WorldWideScience

Sample records for adaptive mobile user

  1. Adaptive User Interface for Mobile Devices

    Mitrovic, Nikola; Mena Nieto, Eduardo

    2009-01-01

    Adapting a graphical user interface (GUI) to a variety of resources with different capabilities is one of the most interesting questions of today's mobile computation. The GUI constructed for one application should be usable on different interactive devices, e.g. WebTV terminals, WAP phones or Java-enabled devices. In this paper, we discuss existing solutions and present a solution based on mobile agents. Mobile agents construct their GUI using third-party eXtensible User interface Language (...

  2. Detecting users handedness for ergonomic adaptation of mobile user interfaces

    Löchtefeld, Markus; Schardt, Phillip; Krüger, Antonio;

    2015-01-01

    Often, we operate mobile devices using only one hand. The hand thereby serves two purposes: holding the device and operating the touch screen with the thumb. The current trend of increasing screen sizes however, makes it close to impossible to reach all parts of the screen (especially the top are...

  3. Context-based service adaptation platform: Improving the user experience towards mobile location services

    Schou, Saowanee

    2008-01-01

    Back in 2000 and the, following two or three years, mobile location services gained a great deal of interest and they were considered as one of the few service categories where users would be willing to pay for the usage. Since 2000 countless mobile location services have been launched in different...... parts of the world. However, the mobile location services have obviously not yet met the hyped expectation of mass-market adoption that was expressed in 2000. The lack of adaptability and offerings tailored to different user requirements in specific contexts of use is one of the factors inhibiting the...

  4. Adaptive algorithm for mobile user positioning based on environment estimation

    Grujović Darko

    2014-01-01

    Full Text Available This paper analyzes the challenges to realize an infrastructure independent and a low-cost positioning method in cellular networks based on RSS (Received Signal Strength parameter, auxiliary timing parameter and environment estimation. The proposed algorithm has been evaluated using field measurements collected from GSM (Global System for Mobile Communications network, but it is technology independent and can be applied in UMTS (Universal Mobile Telecommunication Systems and LTE (Long-Term Evolution networks, also.

  5. Context-based service adaptation platform: Improving the user experience towards mobile location services

    Schou, Saowanee

    Back in 2000 and the, following two or three years, mobile location services gained a great deal of interest and they were considered as one of the few service categories where users would be willing to pay for the usage. Since 2000 countless mobile location services have been launched in different...... parts of the world. However, the mobile location services have obviously not yet met the hyped expectation of mass-market adoption that was expressed in 2000. The lack of adaptability and offerings tailored to different user requirements in specific contexts of use is one of the factors inhibiting the...... take-off of the existing mobile location services both in Asia and Western Europe. Adaptability is envisioned by Wireless World Research Forum (WWRF) as one of the keys to the success of any service beyond year 2010 and one of the service capabilities that should be made available on the next...

  6. User-Adapted Recommendation of Content on Mobile Devices Using Bayesian Networks

    Iwasaki, Hirotoshi; Mizuno, Nobuhiro; Hara, Kousuke; Motomura, Yoichi

    Mobile devices, such as cellular phones and car navigation systems, are essential to daily life. People acquire necessary information and preferred content over communication networks anywhere, anytime. However, usability issues arise from the simplicity of user interfaces themselves. Thus, a recommendation of content that is adapted to a user's preference and situation will help the user select content. In this paper, we describe a method to realize such a system using Bayesian networks. This user-adapted mobile system is based on a user model that provides recommendation of content (i.e., restaurants, shops, and music that are suitable to the user and situation) and that learns incrementally based on accumulated usage history data. However, sufficient samples are not always guaranteed, since a user model would require combined dependency among users, situations, and contents. Therefore, we propose the LK method for modeling, which complements incomplete and insufficient samples using knowledge data, and CPT incremental learning for adaptation based on a small number of samples. In order to evaluate the methods proposed, we applied them to restaurant recommendations made on car navigation systems. The evaluation results confirmed that our model based on the LK method can be expected to provide better generalization performance than that of the conventional method. Furthermore, our system would require much less operation than current car navigation systems from the beginning of use. Our evaluation results also indicate that learning a user's individual preference through CPT incremental learning would be beneficial to many users, even with only a few samples. As a result, we have developed the technology of a system that becomes more adapted to a user the more it is used.

  7. Mobile adaptations for a multi-user framework supporting video-based avatars

    Quax, Peter; JEHAES, Tom; Wijnants, Maarten; Lamotte, Wim

    2005-01-01

    Networked Virtual Environment technology has pushed the boundaries of a number of currently popular applications on the Internet. On-line virtual communities and large-scale on-line games are representative examples of the commercial appeal of the research in this area. However, these applications have not yet made it into the mobile scene . In general, when analyzing the current market for mobile applications, the type of applications that can be distinguished is twofold. On the one end, ex...

  8. Adaptive Mobile Work Processes

    Hauso, Frode; Røed, Øivind

    2005-01-01

    Systems that efficiently provide support for adaptive work processes in a mobile environment do not exist according to our knowledge. Such systems would increase efficiency and safety in environments where work is inherently mobile, ad-hoc, and requires input from a set of heterogeneous sources. Traditional work support systems are normally not capable of dynamic change and plans must be made before work is started. This conflicts with most work processes, which are dynamic and where plans ca...

  9. Exploring the Mobility of Mobile Phone Users

    Csáji, Balázs Cs; Traag, V A; Delvenne, Jean-Charles; Huens, Etienne; Van Dooren, Paul; Smoreda, Zbigniew; Blondel, Vincent D

    2013-01-01

    Mobile phone datasets allow for the analysis of human behavior on an unprecedented scale. The social network, temporal dynamics and mobile behavior of mobile phone users have often been analyzed independently from each other using mobile phone datasets. In this article, we explore the connections between various features of human behavior extracted from a large mobile phone dataset. Our observations are based on the analysis of communication data of 100000 anonymized and randomly chosen individuals in a dataset of communications in Portugal. We show that clustering and principal component analysis allow for a significant dimension reduction with limited loss of information. The most important features are related to geographical location. In particular, we observe that most people spend most of their time at only a few locations. With the help of clustering methods, we then robustly identify home and office locations and compare the results with official census data. Finally, we analyze the geographic spread ...

  10. User Experience of Mobile Devices

    Raptis, Dimitrios

    that the overall physical form of a mobile device has a significant effect on the perceived usability of an application: the more attractive the physical form, the higher the perceived usability. The other study validated the effect of a particular physical form element on usability and showed that the screen size......This thesis focuses on mobile devices and it specifically investigates the effect of their physical form on two perceived user experience qualities, usability and coolness. With the term mobile devices, I refer to interactive products that users interact with while being on the move......, and with the term physical form I refer to the physical elements that constitute a mobile device as a whole, such as weight, size and materials. The selected research area was addressed through two research questions, one focusing on effects of physical form on usability and the other on effects on coolness...

  11. Exploring the mobility of mobile phone users

    Csáji, Balázs Cs.; Browet, Arnaud; Traag, V. A.; Delvenne, Jean-Charles; Huens, Etienne; Van Dooren, Paul; Smoreda, Zbigniew; Blondel, Vincent D.

    2013-03-01

    Mobile phone datasets allow for the analysis of human behavior on an unprecedented scale. The social network, temporal dynamics and mobile behavior of mobile phone users have often been analyzed independently from each other using mobile phone datasets. In this article, we explore the connections between various features of human behavior extracted from a large mobile phone dataset. Our observations are based on the analysis of communication data of 100,000 anonymized and randomly chosen individuals in a dataset of communications in Portugal. We show that clustering and principal component analysis allow for a significant dimension reduction with limited loss of information. The most important features are related to geographical location. In particular, we observe that most people spend most of their time at only a few locations. With the help of clustering methods, we then robustly identify home and office locations and compare the results with official census data. Finally, we analyze the geographic spread of users’ frequent locations and show that commuting distances can be reasonably well explained by a gravity model.

  12. ADAPTING LINUX AS MOBILE OPERATING SYSTEM

    Kaushik Velusamy

    2013-01-01

    Full Text Available In this fast growing world, people are increasingly mobile; everything is fast, connected and highly secured. All these have put up the requirements on mobile devices and leads to several features being added in the mobile operating systems and its architecture. The development of the next generation software platform based on Linux for mobile phones provides enhanced user experience, power management, cloud support and openness in the design. In spite of many studies on Linux, the investigations on the challenges and benefits of reusing and adapting the Linux kernel to mobile platforms is very less. In this study, a study on architecture of the Linux, its adaptations for a mobile operating system, requirements and analysis for Linux mobile phones, comparison with android and solution technologies to satisfy the requirements for a Linux mobile operating system are analysed and discussed."

  13. Adapting to changing user expectations

    Poland, Jean

    2004-01-01

    Results of user surveys indicate that science and technology library user needs differ from those of humanists and social scientists and are changing rapidly. Science and technology libraries are taking the lead in adapting the public services model accordingly. Science and technology library users are most interested in easy-to-use access tools and library Web sites that enable them to find information on their own as well as easy access to materials from home and office. Their expectations ...

  14. Case Study Of Mobile Internet User Experience

    Ali, Waqas

    2012-01-01

    Mobile Internet is currently considered as the future for the Internet. Apparently the number of mobile handset sold as compared to desktop PCs is noticeable. These hints depict the potential of mobile Internet and the future market strongly relying on mobile devices. But at the same time mobile internet users are growing slower in numbers. Particularly in market where the internet access is very simple through computers, mobile internet users seems not very enthusiastic to use internet on mo...

  15. Towards personalized adaptive user interfaces

    An approach towards standardization of the general rules for synthesis and design of man machine interfaces that include dynamic adaptive behavior is presented. The link between the personality type (Myers-Briggs or Kersey Temperament sorter) and the personal preferences of the users (Kansei) for the purpose of building Graphical User Interface (GU]) was investigated. The rules for a personalized el-notional GUI based on the subjective preferences of the users were defined. The results were tested on a modified TETRIS game that displayed background characters capable of emotional response. When the system responded to a user in a manner that is customized to his or her preferences, the reaction time was smaller and the information transfer was faster. Usability testing methods were used and it was shown that development of pleasant cartoon face GUI based on the users inborn personality tendencies was feasible. (Author)

  16. Conceptual Model of User Adaptive Enterprise Application

    Inese Šūpulniece

    2015-07-01

    Full Text Available The user adaptive enterprise application is a software system, which adapts its behavior to an individual user on the basis of nontrivial inferences from information about the user. The objective of this paper is to elaborate a conceptual model of the user adaptive enterprise applications. In order to conceptualize the user adaptive enterprise applications, their main characteristics are analyzed, the meta-model defining the key concepts relevant to these applications is developed, and the user adaptive enterprise application and its components are defined in terms of the meta-model. Modeling of the user adaptive enterprise application incorporates aspects of enterprise modeling, application modeling, and design of adaptive characteristics of the application. The end-user and her expectations are identified as two concepts of major importance not sufficiently explored in the existing research. Understanding these roles improves the adaptation result in the user adaptive applications.

  17. Android Based Mobile Environment for Moodle Users

    de Clunie, Gisela T.; Clunie, Clifton; Castillo, Aris; Rangel, Norman

    2013-01-01

    This paper is about the development of a platform that eases, throughout Android based mobile devices, mobility of users of virtual courses at Technological University of Panama. The platform deploys computational techniques such as "web services," design patterns, ontologies and mobile technologies to allow mobile devices communicate…

  18. Cost based optimization of mobile user experience

    Oberstar, Klavdij

    2014-01-01

    The monthly cost of mobile services can easily exceed the designated limit. Therefore, we set a goal to create smart mobile assistant. Smart mobile assistant would advise user how and in what manner he should use mobile services, so he will get the lowest monthly cost. We have implemented a prototype, which use methods of data mining and user profiling so that can show user consumption, statistics and advises on making better use of mobile services, according to his way of consumption of mobi...

  19. International User Acquisition Processes of Mobile Games

    Kesto, Kiira

    2015-01-01

    This thesis is about the user acquisition of mobile games, more specifically marketing them in different regions of the world. The main research question was “How to successfully market to different parts of the world from the point of view of user acquisition”. The objective of the thesis was to research the differences in user acquisition marketing in different regions of the world. The focus was on bought media, specifically user acquisition done through user acquisition agencies and netwo...

  20. INTERNET MOBILE USERS FROM ROMANIA AND MOBILE APPS

    MIHAELA TUTUNEA

    2011-01-01

    The development of mobile technologies triggered also the development of the software industry for mobile devices. Any mobile phone, depending on its features, has preinstalled basic applications, which make it functional. Along these, the user can install more applications according to his needs. Must be noticed the current trend: companies developing and offering their own mobile applications, which can be downloaded directly from the mobile websites. The present study tries to identify the...

  1. Fractal Adaptive Web Service for Mobile Learning

    Ichraf Tirellil

    2006-06-01

    Full Text Available This paper describes our proposition for adaptive web services which is based on configurable, re-usable adaptive/personalized services. To realize our ideas, we have developed an approach for designing, implementing and maintaining personal service. This approach enables the user to accomplish an activity with a set of services answering to his preferences, his profiles and to a personalized context. In this paper, we describe the principle of our approach that we call fractal adaptation approach, and we discuss the implementation of personalization services in the context of mobile and collaborative scenario of learning. We have realized a platform in this context -a platform for mobile and collaborative learning- based on fractal adaptable web services. The platform is tested with a population of students and tutors, in order to release the gaps and the advantages of the approach suggested.

  2. Adaptive mobility aids for the elderly

    Wasson, Glenn; Gunderson, James; Cvetanovich, Michael; Kell, Steven; Graves, S.; Felder, Robin A.

    2001-10-01

    Loss of mobility in the elderly causes a significant economic burden to caregivers and is one of the most significant determinants of depression and loss of muscle strength and productivity in this age group. Mobility aids can assist with locomotion by providing physical support, however they fail to provide direction guidance and avoidance of obstacles and hazards. This talk will focus on design of intelligent adaptive wheeled walkers. By allowing the user varying degrees of control, from complete to collaborative, these walkers afford the user with the feeling of control, while helping to increase the ease and safety of their daily travels. The control systems of these walkers differ from those of other mobility aids and mobile robots because they must both assist in mobility and provide balance and support, but also give directional aid if necessary. These functions must be performed in a tight loop adaptation with a human whose input may be difficult to predict. Through the use of a wheeled walker equipped with force and sonar sensors, we were able to develop an intelligent self-guided mobility aid that can provide improved independence, autonomy, and quality of life for the elderly.

  3. Unobtrusive user modeling for adaptive hypermedia

    H.J. Holz; K. Hofmann; C. Reed

    2008-01-01

    We propose a technique for user modeling in Adaptive Hypermedia (AH) that is unobtrusive at both the level of observable behavior and that of cognition. Unobtrusive user modeling is complementary to transparent user modeling. Unobtrusive user modeling induces user models appropriate for Educational

  4. Mobility-related participation and user satisfaction

    Brandt, Aase; Kreiner, Svend; Iwarsson, Susanne

    2010-01-01

    Purpose. The aim of this study was to investigate the constructs of mobility-related participation and user satisfaction, two important outcome dimensions within praxis and research on mobility device interventions. Method. To fulfill this aim, validity and reliability of a 12-item scale on...... mobility-related participation and a 10-item scale on user satisfaction were examined in the context of older people’s powered wheelchair use (n¼111). Rasch analysis and correlation analysis were applied. Results. Construct validity of both scales was confirmed.The reliability of the user satisfaction...... scale was good,while themobilityrelated participation scalewas not optimal in discriminating between personswith a high degree ofmobility-related participation. It was demonstrated that mobility-related participation and user satisfaction are separate, not related constructs. Conclusions. It can be...

  5. Context aware adaptation of user interfaces

    Genaro Motti, Vivian; Vanderdonckt, Jean

    2014-01-01

    Context-aware Adaptation (CAA) of user interfaces involves the identification of the relevant context information that surrounds the user during her interaction in order to properly adapt elements of an interactive system aiming at enhancing the end user interaction. The main goals of CAA are improving the usability levels of the system by using the relevant information of the user context to properly transform a system.In this special issue the authors are presenting various model-based appr...

  6. Adaptive Behavior for Mobile Robots

    Huntsberger, Terrance

    2009-01-01

    The term "System for Mobility and Access to Rough Terrain" (SMART) denotes a theoretical framework, a control architecture, and an algorithm that implements the framework and architecture, for enabling a land-mobile robot to adapt to changing conditions. SMART is intended to enable the robot to recognize adverse terrain conditions beyond its optimal operational envelope, and, in response, to intelligently reconfigure itself (e.g., adjust suspension heights or baseline distances between suspension points) or adapt its driving techniques (e.g., engage in a crabbing motion as a switchback technique for ascending steep terrain). Conceived for original application aboard Mars rovers and similar autonomous or semi-autonomous mobile robots used in exploration of remote planets, SMART could also be applied to autonomous terrestrial vehicles to be used for search, rescue, and/or exploration on rough terrain.

  7. Mobile, Flexible, and Adaptable

    Agergaard, Jytte; Thao, Thi Vu

    2011-01-01

    Industrialisation and urban growth are constitutive aspects of Vietnam's new economy and are important driving forces behind increasing rural-to-urban migration. Growth in informal sector employment is a significant aspect of this development, which has provided for both male and female migrants...... networking, and remittance practices. The paper is organised around why and how migrants have entered the informal labour market in Hanoi and how they make their livings there while also maintaining ties with their rural homes. In conclusion, we discuss how the migration networks and remittance practices of...... the female porters demonstrate a particular way of adapting to the migration process. Also, it is emphasised how women's flexible practices are facilitated by women's own village-based networks. It is suggested that ‘in-betweenness’, which stands for the simultaneous and overlapping presence of urban...

  8. User driven innovation in mobile technologies?

    Larsen, Casper Schultz; Koch, Christian

    2007-01-01

    site practises, and headquarters - inspired by specific user needs for optimizing work processes. The most important mechanisms evoked for creating the mediating found in the paper are ‘hybrids’ where professionals from AEC establishes a software house, developing ICT-products for specific on......Developing dedicated mobile technology systems for AEC demands the introduction of user driven innovation. A Danish research project collected international examples and user-experiences of mobile and handheld ICT in the building industry i.a. by reading off the functionality of the mobile...... by systems already in function. Stories of prior business successes can be an important tool to ensure further innovative investments since lack of enterprise strategies is often an obstacle for innovation, especially user driven. Both small and large software houses develops dedicated software for coupling...

  9. Adaptive Text Entry for Mobile Devices

    Proschowsky, Morten Smidt

    for mobile devices and a framework for adaptive context-aware language models. Based on analysis of current text entry methods, the requirements to the new text entry methods are established. Transparent User guided Prediction (TUP) is a text entry method for devices with one dimensional touch input....... It can be touch sensitive wheels, sliders or similar input devices. The interaction design of TUP is done with a combination of high level task models and low level models of human motor behaviour. Three prototypes of TUP are designed and evaluated by more than 30 users. Observations from the...... evaluations are used to improve the models of human motor behaviour. TUP-Key is a variant of TUP, designed for 12 key phone keyboards. It is introduced in the thesis but has not been implemented or evaluated. Both text entry methods support adaptive context-aware language models. YourText is a framework for...

  10. CUSTOMERS SATISFACTION OF SAMSUNG MOBILE HANDSET USERS

    Nidhi P. Shah

    2013-01-01

    The main aim of this research paper is to find customers satisfactions with relations to some variables like individual features, price, brand name etc. In this study researcher has focused on the customer of Bhavnagar city and research is carried out by primary data analysis tools like Correlation, study indicates an average satisfactions of customers toward MOBILE HANDSET USERS OF SAMSUNG. Key words: Mobile handset, Karl Pearson's Correlation, frequency, Samsung

  11. Identifying users profiles from mobile calls habits

    Furletti, Barbara; Gabrielli, Lorenzo; Rinzivillo, Salvatore; Renso, Chiara

    2012-01-01

    The huge quantity of positioning data registered by our mobile phones stimulates several research questions, mainly originating from the combination of this huge quantity of data with the extreme heterogeneity of the tracked user and the low granularity of the data. We propose a methodology to partition the users tracked by GSM phone calls into profiles like resident, commuters, in transit and tourists. The methodology analyses the phone calls with a combination of top-down and bottom up tech...

  12. Online kiosks: the alternative to mobile technologies for mobile users

    Slack, Frances; Rowley, J.

    2002-01-01

    Online kiosks have the potential to be a significant alternative to mobile technologies in retailing, information provision and service delivery. This article describes the development and use of different types of online kiosk in contexts where users are on the move and away from fixed technologies. A case study of a major UK airport terminal is used to illustrate different types of kiosk applications. Comparisons are made with mobile phone technologies. Online kiosks have a niche in allowin...

  13. Object-oriented user interfaces for personalized mobile learning

    Alepis, Efthimios

    2014-01-01

    This book presents recent research in mobile learning and advanced user interfaces. It is shown how the combination of this fields can result in personalized educational software that meets the requirements of state-of-the-art mobile learning software. This book provides a framework that is capable of incorporating the software technologies, exploiting a wide range of their current advances and additionally investigating ways to go even further by providing potential solutions to future challenges. The presented approach uses the well-known Object-Oriented method in order to address these challenges. Throughout this book, a general model is constructed using Object-Oriented Architecture. Each chapter focuses on the construction of a specific part of this model, while in the conclusion these parts are unified. This book will help software engineers build more sophisticated personalized software that targets in mobile education, while at the same time retaining a high level of adaptivity and user-friendliness w...

  14. LOGGING AND ANALYZING LONG-TERM MOBILE USER BEHAVIOR

    Hui-Yin Wu

    2014-12-01

    Full Text Available With the rapid evolution of mobile devices, the usage patterns of applications on these devices also change over time. Recently, the topic of how user behavior and usage patterns of applications has adapted to new mobile devices such as smartphones has attracted much attention. This work presents an experimental platform that can log and analyze all user operations on a smartphone used in a real-life context over long periods of time. The collected data are transmitted to a server periodically whenever an Internet connection is available. Analytic tools such as charting, log query, and real-time log pattern analysis have also been developed to facilitate the study of user behavior. This paper illustrates the functionalities of the proposed platform through several examples and a sample case study.

  15. Adaptive media content architecture regarding users capabilities

    Cuenca Gil, David

    2009-01-01

    Nowadays, it's common that each user has different capabilities and each media content has different requirements. So, in this project will be studied and implement a first approach how to adapt media content stored in repositories to users capabilities. Different kinds of video content will be studied, and how their requirements can be changed with a good subjective quality for the user. Depending on the kind of content, different types of changes could be done in order to decrease the video...

  16. The Coevolution of Mobile OS User Market and Mobile Application Developer Community

    Liguo Yu

    2013-02-01

    Full Text Available Mobile computing is becoming increasingly popular. Accordingly, mobile OS (operating systems are becoming standard platforms for regular computer and phone users. This paper studies the evolution and the current status of mobile OS user market and mobile application developer community. In particular, we study how smartphone mobile OS user market coevolves with its application developer community. Through this study, we highlight the symbiosis relations between mobile OS user market and mobile apps developer community.

  17. User applications unique to mobile satellites

    Castiel, David

    1990-01-01

    As AMSC enters the market with its mobile satellite services, it faces a sophisticated user group that has already experimented with a wide range of communications services, including cellular radio and Ku-band satellite messaging. AMSC's challenge is to define applications unique to the capabilities of its dedicated L band satellite and consistent with the provisions outlined in its FCC license. Through a carefully researched approach to its three main markets (aeronautical, land mobile, and maritime) AMSC is discovering a wellspring of interest in corporate and general aviation, trucking companies, pipeline monitoring and control companies, maritime management firms, telecommunications companies, and government agencies. A general overview is provided of AMSC's FCC license and corporate history, and the specific applications unique to each user group is discussed.

  18. SMS advertisements\\\\\\' adoption among Tehran mobile users

    Manizheh Haghighinasab

    2014-05-01

    Full Text Available Mobile marketing and SMS (short message services advertising in particular, have been recently used. Even though SMS-based advertising is inexpensive, interactive, and able to yield a high response rate, middle or big size companies do not use it in Iran. For as much as its adoption was unclear, this study was organized to find it out. Since the most populated city in our country, Tehran, is a good multicultural instance to study in many fields, this research has aimed at its citizens' intention to use SMS advertisement. The statistical populations included are mobile users, who came to Mobile Customer Service located in north, south, west, east and centre of Tehran. From which 384 were considered as samples. Technology Acceptance Model (TAM was used for making hypothesizes. Survey's data was collected by questionnaire with cluster and random sampling. Collected data was analyzed regarding to the method: Structural Equation Modeling (SEM in order to do which, the technique Partial List Squares (PLS were used. The results revealed that: despite the lack of adoption for the SMS advertising among mobile users in Tehran, there could be chances to improve it by better perceived usefulness as well as its ease of use. Innovativeness of the people and their trust has indirect impact on their intention to use. Moreover, getting prior permission, making a profile, and individualizing the context with richness of information and entertainers are recommended. Using the new generation 3G and shortcuts will be able to improve SMS advertisement's adoption as well.

  19. The Coevolution of Mobile OS User Market and Mobile Application Developer Community

    Liguo Yu

    2013-01-01

    Mobile computing is becoming increasingly popular. Accordingly, mobile OS (operating systems) are becoming standard platforms for regular computer and phone users. This paper studies the evolution and the current status of mobile OS user market and mobile application developer community. In particular, we study how smartphone mobile OS user market coevolves with its application developer community. Through this study, we highlight the symbiosis relations between mobile OS user...

  20. WIRELESS ADVERTISING: A STUDY OF MOBILE PHONE USERS

    Gurau Calin

    2011-01-01

    Topic: Using a qualitative methodology, this study attempts to provide a general framework of the functions of mobile communication, and to identify the specific preferences of mobile phone users regarding the commercial messages received on their personal devices. Research objectives: (1) To identify the specific characteristics of mobile communication as perceived by mobile users; (2) to define and analyze the functions of wireless communication as perceived by mobile phone users; and (3) t...

  1. Adapting Content Delivery to Limited Resources and Inferred User Interest

    Cezar Plesca

    2008-10-01

    Full Text Available This paper discusses adaptation policies for information systems that are subject to dynamic and stochastic contexts such as mobile access to multimedia web sites. In our approach, adaptation agents apply sequential decisional policies under uncertainty. We focus on the modeling of such decisional processes depending on whether the context is fully or partially observable. Our case study is a movie browsing service in a mobile environment that we model by using Markov decision processes (MDPs and partially observable MDP (POMDP. We derive adaptation policies for this service, that take into account the limited resources such as the network bandwidth. We further refine these policies according to the partially observable users' interest level estimated from implicit feedback. Our theoretical models are validated through numerous simulations.

  2. Engineering Adaptive Model-Driven User Interfaces

    Akiki, Pierre A.; Bandara, Arosha K.; Yu, Yijun

    2016-01-01

    Software applications that are very large-scale, can encompass hundreds of complex user interfaces (UIs). Such applications are commonly sold as feature-bloated off-the-shelf products to be used by people with variable needs in the required features and layout preferences. Although many UI adaptation approaches were proposed, several gaps and limitations including: extensibility and integration in legacy systems, still need to be addressed in the state-of-the-art adaptive UI development syste...

  3. Extraction of Web Content to Adapt Web Pages for Mobile Devices

    Neha Gupta; Saba Hilal

    2011-01-01

    Now a day's mobile phones are replacing conventional PCs' as users are browsing and searching the Internet via their mobile handsets. Web based services and information can be accessed from any location with the help of these Mobile devices such as mobile phones, Personal Digital Assistants (PDA) with relative ease. To access the educational data on mobile devices, web page adaptation is needed, keeping in mind security and quality of data. Various researchers are working on adaptation techni...

  4. ADAPTING LINUX AS MOBILE OPERATING SYSTEM

    Kaushik Velusamy; Shriram K. Vasudevan; Sankari Gopalakrishnan; Subashri Vasudevan; Balachandran Arumugam

    2013-01-01

    In this fast growing world, people are increasingly mobile; everything is fast, connected and highly secured. All these have put up the requirements on mobile devices and leads to several features being added in the mobile operating systems and its architecture. The development of the next generation software platform based on Linux for mobile phones provides enhanced user experience, power management, cloud support and openness in the design. In spite of many studies on Linux, the investigat...

  5. Technology for the Next-Generation-Mobile User Experience

    Delagi, Greg

    specialized circuits, highly parallel architectures, and new packaging design. Another concern of the smart-mobile-companion user will be that their device is able to deliver an always-on, always-aware environment in a way that is completely seamless and transparent. These handsets will automatically determine the best and most appropriate modem link from the multiple choices on the device, including WiFi, LTE, 5G, and mmWave, based on which link will optimize performance, battery life, and network charges to deliver the best possible user experience. In the future, adaptive connectivity will require many different solutions, including the standard modem technologies of today, as well as new machine-machine interfaces and body-area-networks. All of the new and exciting applications and features of these mobile-companion devices are going to require additional energy due to added computational requirements. However, a gap in energy efficiency is quickly developing between the energy that can be delivered by today's battery technologies, and the energy needed to deliver all-day operation or 2-day always-on standby without a recharge. New innovations ranging from low-voltage digital and analog circuits, non-volatile memory, and adaptive power management, to energy harvesting, will be needed to further improve the battery life of these mobile companion devices. Increased bandwidth combined with decreased latency, higher power efficiency, energy harvesting, massive multimedia processing, and new interconnect technologies will all work together to revolutionize how we interact with our smart-companion devices. The implementation challenges in bringing these technologies to market may seem daunting and numerous at first, but with the strong collaboration in research and development from universities, government agencies, and corporations, the smart-mobile-companion devices of the future will likely become reality within 5 years!

  6. A New Mobile Learning Adaptation Model

    Mohamd Hassan Hassan; Jehad Al-Sadi

    2009-01-01

    This paper introduces a new model for m- Learning context adaptation due to the need of utilizing mobile technology in education. Mobile learning; m-Learning for short; in considered to be one of the hottest topics in the educational community, many researches had been done to conceptualize this new form of learning. We are presenting a promising design for a model to adapt the learning content in mobile learning applications in order to match the learner context, preferences and the educatio...

  7. Mobile Phone Usage for M-Learning: Comparing Heavy and Light Mobile Phone Users

    Suki, Norbayah Mohd; Suki, Norazah Mohd

    2007-01-01

    Purpose: Mobile technologies offer the opportunity to embed learning in a natural environment. The objective of the study is to examine how the usage of mobile phones for m-learning differs between heavy and light mobile phone users. Heavy mobile phone users are hypothesized to have access to/subscribe to one type of mobile content than light…

  8. User Friendly Access Solutions for Mobile WiMAX

    Tukkensæter, Brage Rønning

    2009-01-01

    Today, WiMAX networks are deployed several places worldwide. To get access to these networks, users have to buy equipment specialized for one operator with a subscription. User equipment has earlier been stationary or mounted, but with the Mobile WiMAX amendment, smaller receivers are made possible. Mobile WiMAX allows users to move between different operators, making user access and roaming a more challenging task. In this thesis, several Mobile WiMAX access solutions are discussed, emphasi...

  9. Sports video summarization and adaptation for application in mobile communication

    GAO Wen; HUANG Qing-ming; JIANG Shu-qiang; ZHANG Peng

    2006-01-01

    Sports video appeals to large audiences due to its high commercial potentials. Automatically extracting useful semantic information and generating highlight summary from sports video to facilitate users' accessing requirements is an important problem, especially in the forthcoming broadband mobile communication and the need for users to access their multimedia information of interest from anywhere at anytime with their most convenient digital equipments. In this paper, a system to generate highlight summaries oriented for mobile applications is introduced, which includes highlight extraction and video adaptation. In this system, several highlight extraction techniques are provided for field sports video and racket sports video by using multi-modal information. To enhance users' viewing experience and save bandwidth, 3D animation from highlight segment is also generated. As an important procedure to make video analysis results universally applicable, video transcoding techniques are applied to adapt the video for mobile communication environment and user preference. Experimental results are encouraging and show the advantage and feasibility of the system for multimedia content personalization, enhancement and adaptation to meet different user preference and network/device requirements.

  10. A Framework for Mobile User Experiences in Theme Parks

    Østergaard, Claus Møller

    This paper proposes a framework, which contributes to a better theoretical understanding of mobile user experience in theme parks that is not limited to (a) personal smartphones, (b) a specific theme park, or (c) specific mobile content. Thus, the paper contributes to the field of mobile user...

  11. Mobile user-preference-based data dissemination on mobile P2P networks

    Kim Dohoon

    2011-01-01

    Full Text Available Abstract A considerable number of studies have been performed recently on mobile peer-to-peer networks (MOPNETs, as the number of services based on mobile devices has increased. However, existing studies still reveal numerous shortcomings, such as bandwidth overhead, and redundant transmission in terms of multi-broadcast between peers. Especially, owing to the characteristics of MOPNETs, it is extremely important to determine broadcast size and to disseminate data within the limited environment of the network. The mechanism directly affects how well resource information in a mobile device is discovered and how data are transmitted. In this context, it is vital to efficiently disseminate data to be able to arrange hierarchal sequences of resource information of each mobile device for better search performance. Especially, it is also vital to determine the broadcast size, considering the consumption patterns of mobile users. In this article, we propose an adaptable algorithm that determines weighted values and disseminates data using the high-order Markov chain (HoMC. We apply weighted values in consideration of the MOPNET environment. In addition, the proposed HoMC-based Mobile User-preference-based Data Dissemination algorithm was simulated with a Qualnet simulator. Results show that the proposed algorithm performs 17.3% better, on average, in terms of data dissemination, than the existing dissemination methods.

  12. User Movement Behavior Analysis in Mobile Service Environment

    Mohbey Krishna K.; Thakur G.S.

    2013-01-01

    Mobile services are very important and useful to users for accessing desired information as well as performing some transactions. There are different kinds of mobile services which are used using the mobile devices. These mobile services are capable to mine the required knowledge from the huge amount of data. In this paper, mobile access pattern generation approach is proposed, which has capability to generate strong patterns between the four different parameters called mobile use...

  13. Adaptive user displays for intelligent tutoring software.

    Beal, Carole R

    2004-12-01

    Intelligent tutoring software (ITS) holds great promise for K-12 instruction. Yet it is difficult to obtain rich information about users that can be used in realistic educational delivery settings--public school classrooms--in which eye tracking and other user sensing technologies are not suitable. We are pursuing three "cheap and cheerful" strategies to meet this challenge in the context of an ITS for high school math instruction. First, we use detailed representations of student cognitive skills, including tasks to assess individual users' proficiency with abstract reasoning, proficiency with simple math facts and computational skill, and spatial ability. Second, we are using data mining and machine learning algorithms to identify instructional sequences that have been effective with previous students, and to use these patterns to make decisions about current students. Third, we are integrating a simple focus-of-attention tracking system into the software, using inexpensive, web cameras. This coarse-grained information can be used to time the display of multimedia hints, explanations, and examples when the user is actually looking at the screen, and to diagnose causes of problem-solving errors. The ultimate goal is to create non-intrusive software that can adapt the display of instructional information in real time to the user's cognitive strengths, motivation, and attention. PMID:15687804

  14. Characterizing User Mobility in Wireless Networks

    Nunes, Bruno Astuto Arouche

    2012-01-01

    n this work we study mobile wireless networks by looking at mobility management and analysis of human mobility, focusing on the main goal of understanding human mobility and applying our findings on developing new realistic mobility models for simulations. In our work, we start by analyzing Wireless Local Area Networks (WLAN) and GPS traces that record mobility in a variety of network environments. We observe that from a macroscopic level, human mobility is symmetric. We also study the direct...

  15. Adaptive Locking Protocols for Mobile Databases

    Skjerven, Steinar

    2006-01-01

    Denne diplomoppgaven har undersøkt hvordan en adaptiv låseprotokoll kan hjelpe mobile databaser til å håndtere forskjellige problemer som eksisterer i det mobile miljøet. Diplomoppgaven har også undersøkt hvordan andre låseprotokoller løser problemer i det mobile miljøet. En av disse andre låseprotokollene er låseprotokollen online-offline, som den adaptive låseprotokollen har tatt utgangspunkt i. Den adaptive låseprotokollen har også hentet ideer fra de andre låseprotokollene. Design og impl...

  16. Development of the Specific Adaptation Mobility Cane.

    Arrington, S.

    1995-01-01

    A travel cane was adapted for use by a 10-year-old boy with cortical blindness, severe mental retardation and cerebral palsy affecting his left arm and leg. The Specific Adaptation Mobility Cane utilizes the affected arm to hold the cane while leaving the other hand free for trailing walls, opening doors, carrying objects, and holding handrails.…

  17. E-Commerce Mobile Marketing Model Resolving Users Acceptance Criteria

    Veronica S. Moertini; Criswanto D. Nugroho

    2012-01-01

    The growth of e-commerce and mobile services has been creating business opportunities. Among these,mobile marketing is predicted to be a new trend of marketing. As mobile devices are personal tools suchthat the services ought to be unique, in the last few years, researches have been conducted studies relatedto the user acceptance of mobile services and produced results. This research aims to develop a model ofmobile e-commerce mobile marketing system, in the form of computer-based information...

  18. A mobile design lab for user-driven innovation

    Christiansen, Ellen; Kanstrup, Anne Marie

    2007-01-01

    The paper presents the history and conceptual foundation for the Mobile Design Lab, ment to support both designers and users in the acts of user-driven innovation. The Mobile Design Lab is based on Vygotsky's theory of tool- and language-mediation, and was created in 2004 to support research...

  19. Detection of mobile user location on next generation wireless networks

    Schou, Saowanee; Olesen, Henning

    2005-01-01

    Mobile IPv6 device can be determined by mapping the geographical location information with the two care-of-addresses and the physical address of the access point where the user is connected. Such a mechanism makes location services for mobile entities available on a global IP network. The end-users can...

  20. Detection of mobile user location on next generation wireless networks

    Schou, Saowanee; Olesen, Henning

    2005-01-01

    of a Mobile IPv6 device can be determined by mapping the geographical location information with the two care-of-addresses and the physical address of the access point where the user is connected. Such a mechanism makes location services for mobile entities available on a global IP network. The end-users can...

  1. User Interface Cultures of Mobile Knowledge Workers

    Petri Mannonen

    2008-01-01

    Information and communication tools (ICTs) have become a major influencer of how modern work is carried out. Methods of user-centered design do not however take into account the full complexity of technology and the user interface context the users live in. User interface culture analysis aims providing to designers new ways and strategies to better take into account the current user interface environment when designing new products. This paper describes the reasons behind user interface cult...

  2. The Adaptation of Mobile Learning System Based on Business Rules

    2010-01-01

    <正>In the mobile learning system,it is important to adapt to mobile devices.Most of mobile learning systems are not quickly suitable for mobile devices.In order to provide adaptive mobile services,the approach for adaptation is proposed in this paper.Firstly,context of mobile devices and its influence on mobile learning system are analized and business rules based on these analysis are presented.Then,using the approach,the mobile learning system is constructed.The example implies this approach can adapt the mobile service to the mobile devices flexibly.

  3. A Foundation for Mobile User Experiences in Theme Parks

    Østergaard, Claus Møller

    Based on case studies, this paper proposes a theoretical understanding of three essential aspects, which affect mobile user experiences in theme parks. The aspect are (a) the controllability of the mobile content, (b) the balance in the hybrid space of proximate physical place and remote digital...... space, and (c) the social space. Furthermore, the social space is exceptionally important in understanding mobile user experiences in theme parks. Thus, this paper proposes to extract the social space from the physical place. This means, that mobile user experiences in theme parks can be understood as...

  4. Raster image adaptation for mobile devices using profiles

    Rosenbaum, René; Hamann, Bernd

    2012-02-01

    Focusing on digital imagery, this paper introduces a strategy to handle heterogeneous hardware in mobile environments. Constrained system resources of most mobile viewing devices require contents that are tailored to the requirements of the user and the capabilities of the device. Appropriate image adaptation is still an unsolved research question. Due to the complexity of the problem, available solutions are either too resource-intensive or inflexible to be more generally applicable. The proposed approach is based on scalable image compression and progressive refinement as well as data and user profiles. A scalable image is created once and used multiple times for different kinds of devices and user requirements. Profiles available on the server side allow for an image representation that is adapted to the most important resources in mobile computing: screen space, computing power, and the volume of the transmitted data. Options for progressively refining content thereby allow for a fluent viewing experience during adaptation. Due to its flexibility and low complexity, the proposed solution is much more general compared to related approaches. To document the advantages of our approach we provide empirical results obtained in experiments with an implementation of the method.

  5. Designing the Mobile Web: Guidelines for User Interactionand Experience

    Ring, Lisa

    2013-01-01

    The area of mobile web is evolving rapidly but there are still no consensus regarding recommendations or best practices within the topic. Therefore this thesis is focused on interaction design within mobile web and compiles many dierent theories into guidelines for mobileweb design. The thesis may also be used as a foundation when deciding whether to developa native mobile application or a mobile adapted web application, or when choosing betweena separate mobile web application and a responsi...

  6. User cooperation, virality and gaming in a social mobile network

    Varga, C; Blazovics, L; Charaf, H;

    2012-01-01

    Social networks and mobile systems are both rapidly developing areas nowadays. In this chapter, we will introduce Gedda-Headz, a novel social mobile gaming concept that brings these two areas together. Gedda-Headz is a social mobile network that mainly focuses on multiplayer mobile gaming. First we...... will thoroughly discuss how users may cooperate with each other in Gedda-Headz, as cooperation is very important in a mobile environment. Among other benefits, it may help users to use services that would otherwise be unreachable for them, or greatly decrease the energy cost of certain activities...

  7. Fog Computing: Focusing on Mobile Users at the Edge

    Luan, Tom H.; Gao, Longxiang; Li, Zhi; Xiang, Yang; Wei, Guiyi; Sun, Limin

    2015-01-01

    With smart devices, particular smartphones, becoming our everyday companions, the ubiquitous mobile Internet and computing applications pervade people daily lives. With the surge demand on high-quality mobile services at anywhere, how to address the ubiquitous user demand and accommodate the explosive growth of mobile traffics is the key issue of the next generation mobile networks. The Fog computing is a promising solution towards this goal. Fog computing extends cloud computing by providing...

  8. Adaptive Hybrid Mobile Agent Protocol for Wireless Multihop Internet Access

    A. Velmurugan

    2006-01-01

    Full Text Available Internet-based Mobile Ad Hoc Networking (MANET is an emerging technology that supports self-organizing mobile networking infrastructures. This is expected to be of great use in commercial applications for the next generation Internet users. A number of technical challenges are faced today due to the heterogeneous, dynamic nature of this hybrid MANET. A new hybrid routing scheme AODV_ALMA is proposed, which act simultaneously combining mobile agents to find path to the gateway to establish connection with Internet host and on-demand distance vector approach to find path in local MANET is one of the unique solution. An adaptive gateway discovery mechanism based on mobile agents making use of pheromone value, pheromone decay time and balance index is used to estimate the path and next hop to the gateway. The mobile nodes automatically configure the address using mobile agents first selecting the gateway and then using the gateway prefix address. The mobile agents are also used to track changes in topology enabling high network connectivity with reduced delay in packet transmission to Internet. The performance tradeoffs and limitations with existing solutions for various mobility conditions are evaluated using simulation."

  9. WIRELESS ADVERTISING: A STUDY OF MOBILE PHONE USERS

    Gurau Calin

    2011-07-01

    Full Text Available Topic: Using a qualitative methodology, this study attempts to provide a general framework of the functions of mobile communication, and to identify the specific preferences of mobile phone users regarding the commercial messages received on their personal devices. Research objectives: (1 To identify the specific characteristics of mobile communication as perceived by mobile users; (2 to define and analyze the functions of wireless communication as perceived by mobile phone users; and (3 to investigate users preference regarding the content of commercial wireless communication. Previous research: Bauer et al. (2002 identified time, location, information and personalization as relevant acceptance factors for mobile advertising. Barwise and Strong (2002 developed a conceptual model, arguing that social norms, user's motives, mode, time, location and personal characteristics will affect the processing of mobile information by consumers. Tsang et al. (2004 evidenced the influence of entertainment, informativeness and irritation, while Bauer et al. (2005 argued that consumer attitudes are influenced by perceived information, entertainment, and social utility. In a similar study, Xu and Gutierrez (2006 tested the effect of entertainment, irritation, informativeness, credibility and personalization on the attitudes of Chinese consumers. Research methodology: First, a series of academic and practical articles and reports have been accessed in order to assess the existing knowledge on this topic. Second, five focus groups have been organized with six mobile phone users, aged between 20 and 40 years old. Each focus group comprised an equal number of male and female participants. The focus groups lasted between 45 and 60 minutes and addressed three main issues: the specific characteristics of the mobile phones as a commercial communication media, the functions of mobile phone communication, and the specific preferences of mobile phones users regarding the

  10. Simple adaptive tracking control for mobile robots

    Bobtsov, Alexey; Faronov, Maxim; Kolyubin, Sergey; Pyrkin, Anton

    2014-12-01

    The problem of simple adaptive and robust control is studied for the case of parametric and dynamic dimension uncertainties: only the maximum possible relative degree of the plant model is known. The control approach "consecutive compensator" is investigated. To illustrate the efficiency of proposed approach an example with the mobile robot motion control using computer vision system is considered.

  11. User-centred design of flexible hypermedia for a mobile guide: reflections on the hyperaudio experience

    Petrelli, D.; Not, E.

    2005-01-01

    A user-centred design approach involves end-users from the very beginning. Considering users at the early stages compels designers to think in terms of utility and usability and helps develop a system based on what is actually needed. This paper discusses the case of HyperAudio, a context-sensitive adaptive and mobile museum guide developed in the late 1990s. User requirements were collected via a survey to understand visitors' profiles and visit styles in natural science museums. The knowled...

  12. The kindest cut: enhancing the user experience of mobile TV through adequate zooming

    Knoche, H.; Papaleo, M.; Sasse, M.A.; Vanelli-Coralli, A.

    2007-01-01

    The growing market of Mobile TV requires automated adaptation of standard TV footage to small size displays. Especially extreme long shots (XLS) depicting distant objects can spoil the user experience, e.g. in soccer content. Automated zooming schemes can improve the visual experience if the resulting footage meets user expectations in terms of the visual detail and quality but does not omit valuable context information. Current zooming schemes are ignorant of beneficial zoom ranges for a giv...

  13. Mobile Phone Brand Categorization vs. Users' Security Practices

    G. Kandus; Androulidakis, I

    2011-01-01

    In the present paper, we correlated the brand of mobile phone to users’ security practices, statistically processing a large pool of the responses of 7172 students in 17 Universities of 10 Eastern and Southern Europe countries. Users show different behavior in an array of characteristics, according to the brand of the mobile phone they are using. As such, there is a categorization of areas, different for each brand, where users are clearly lacking security mind, possibly due to lack of ...

  14. Mobile money system design for illiterate users in rural Ethiopia

    Woldmariam, MF; Ghinea, G.; Atnafu, S; Grønli, T-M

    2014-01-01

    Current mobile money systems provide users with hierarchical user interface and represent money as a positive rational numbers of the form 1, 3, 4.87.N. However, research indicates that rural communities that cannot read and write have a challenge entering such numbers in to mobile money system. Navigating through hierarchical text menu is also difficult to illiterate individuals. The present study uses concepts like memory placeholders, dragging & dropping; swiping, temporary holding space, ...

  15. E-Commerce Mobile Marketing Model Resolving Users Acceptance Criteria

    Veronica S. Moertini

    2012-12-01

    Full Text Available The growth of e-commerce and mobile services has been creating business opportunities. Among these,mobile marketing is predicted to be a new trend of marketing. As mobile devices are personal tools suchthat the services ought to be unique, in the last few years, researches have been conducted studies relatedto the user acceptance of mobile services and produced results. This research aims to develop a model ofmobile e-commerce mobile marketing system, in the form of computer-based information system (CBISthat addresses the recommendations or criteria formulated by researchers. In this paper, the criteriaformulated by researches are presented then each of the criteria is resolved and translated into mobileservices. A model of CBIS, which is an integration of a website and a mobile application, is designed tomaterialize the mobile services. The model is presented in the form of business model, system procedures,network topology, software model of the website and mobile application, and database models.

  16. User behavior in location search on mobile devices

    Y. Norouzzadeh Ravari; I. Markov; A. Grotov; M. Clements; M. de Rijke

    2015-01-01

    Location search engines are an important part of GPS-enabled devices such as mobile phones and tablet computers. In this paper, we study how users behave when they interact with a location search engine by analyzing logs from a popular GPS-navigation service to find out whether mobile users’ locatio

  17. Mobile Broadcast DRM Based on User Identity Card

    Byung-Rae Lee

    2007-11-01

    Full Text Available The current mobile broadcast systems do not provide efficient solution for consumption of service and content based on the user identity card such as a smartcard. This prevents users from consuming broadcast service and contents independent of a specific terminal (e.g., the one used for registration or purchase. To provide usage of broadcast services based on the user identity card, mutual authentication needs to be established among the service provider, the terminal, and the user identity card whenever the terminal is changed. The crucial element for this is assuring the service provider, the terminal, and the user identity card by authenticating each entity to the other entities. In this paper, we propose the new authentication scheme, which provides efficient scheme for three kinds of mutual authentications among the service provider, the terminal, and the user identity card. We also construct mobile broadcast DRM system based on the proposed authentication scheme for consumption of broadcast services with multiple terminals.

  18. Usable SPACE: Security, Privacy, and Context for the Mobile User

    Jutla, Dawn

    Users breach the security of data within many financial applications daily as human and/or business expediency to access and use information wins over corporate security policy guidelines. Recognizing that changing user context often requires different security mechanisms, we discuss end-to-end solutions combining several security and context mechanisms for relevant security control and information presentation in various mobile user situations. We illustrate key concepts using Dimitri Kanevskys (IBM Research) early 2000s patented inventions for voice security and classification.

  19. Adaptive digital beamforming for a CDMA mobile communications payload

    Munoz-Garcia, Samuel G.; Ruiz, Javier Benedicto

    1993-01-01

    In recent years, Spread-Spectrum Code Division Multiple Access (CDMA) has become a very popular access scheme for mobile communications due to a variety of reasons: excellent performance in multipath environments, high scope for frequency reuse, graceful degradation near saturation, etc. In this way, a CDMA system can support simultaneous digital communication among a large community of relatively uncoordinated users sharing a given frequency band. Nevertheless, there are also important problems associated with the use of CDMA. First, in a conventional CDMA scheme, the signature sequences of asynchronous users are not orthogonal and, as the number of active users increases, the self-noise generated by the mutual interference between users considerably degrades the performance, particularly in the return link. Furthermore, when there is a large disparity in received powers - due to differences in slant range or atmospheric attenuation - the non-zero cross-correlation between the signals gives rise to the so-called near-far problem. This leads to an inefficient utilization of the satellite resources and, consequently, to a drastic reduction in capacity. Several techniques were proposed to overcome this problem, such as Synchronized CDMA - in which the signature sequences of the different users are quasi-orthogonal - and power control. At the expense of increased network complexity and user coordination, these techniques enable the system capacity to be restored by equitably sharing the satellite resources among the users. An alternative solution is presented based upon the use of time-reference adaptive digital beamforming on board the satellite. This technique enables a high number of independently steered beams to be generated from a single phased array antenna, which automatically track the desired user signal and null the unwanted interference source. In order to use a time-reference adaptive antenna in a communications system, the main challenge is to obtain a

  20. Adapting Web Information to Disabled and Elderly Users.

    Kobsa, Alfred

    This paper describes work aimed at catering the content of World Wide Web (WWW) pages to the needs of different users, including elderly people and users with vision and motor impairments. An overview is provided of the AVANTI system, a European WWW-based tourist information system that adapts Web pages to each user's individual needs before…

  1. Mobile Agents for Mobile Tourists: A User Evaluation of Gulliver's Genie

    O'Grady, M.; O'Hare, G. M. P.; Sas, Corina

    2005-01-01

    How mobile computing applications and services may be best designed, implemented and deployed remains the subject of much research. One alternative approach to developing software for mobile users that is receiving increasing attention from the research community is that of one based on intelligent agents. Recent advances in mobile computing technology have made such an approach feasible. We present an overview of the design and implementation of an archetypical mobile computing application, ...

  2. Residential mobile phone users complaints' in Spain

    Pérez-Amaral, Teodosio; Gijón, Covadonga; Garín-Muñoz, Teresa; López, Rafael

    2013-01-01

    Consumer satisfaction is a key determinant of customer retention, profitability of operators, consumer welfare and a strategic variable for competition and international comparisons. Spain's mobile customer satisfaction is the lowest in the European Union according to recent EU studies (SMREC, 2013). Consumer complaints are numerous according to official statistics. In turn, consumer complaints (and how well they are dealt with) influence customer satisfaction and retention. This paper analyz...

  3. Stealing PINs via Mobile Sensors: Actual Risk versus User Perception

    Mehrnezhad, Maryam; Toreini, Ehsan; Shahandashti, Siamak F.; Hao, Feng

    2016-01-01

    In the first part of this paper, we propose PINlogger.js which is a JavaScript-based side channel attack revealing user PINs on an Android mobile phone. In this attack, once the user visits a website controlled by an attacker, the JavaScript code embedded in the web page starts listening to the motion and orientation sensor streams without needing any permission from the user. By analysing these streams, it infers the user's PIN using an artificial neural network. Based on a test set of fifty...

  4. User-centric incentive design for participatory mobile phone sensing

    Gao, Wei; Lu, Haoyang

    2014-05-01

    Mobile phone sensing is a critical underpinning of pervasive mobile computing, and is one of the key factors for improving people's quality of life in modern society via collective utilization of the on-board sensing capabilities of people's smartphones. The increasing demands for sensing services and ambient awareness in mobile environments highlight the necessity of active participation of individual mobile users in sensing tasks. User incentives for such participation have been continuously offered from an application-centric perspective, i.e., as payments from the sensing server, to compensate users' sensing costs. These payments, however, are manipulated to maximize the benefits of the sensing server, ignoring the runtime flexibility and benefits of participating users. This paper presents a novel framework of user-centric incentive design, and develops a universal sensing platform which translates heterogenous sensing tasks to a generic sensing plan specifying the task-independent requirements of sensing performance. We use this sensing plan as input to reduce three categories of sensing costs, which together cover the possible sources hindering users' participation in sensing.

  5. User-experience-aware system optimisation for mobile systems

    Bischoff, Alexander S.

    2016-01-01

    This thesis considers the concept of Quality of Experience (QoE) in the context of mobile electronic consumer devices, such as smartphones. The modern smartphone is expected to deliver a high level of user experience across a wide variety of tasks, whilst remaining as power efficient as possible. Commonly, mobile devices undergo runtime optimisation to achieve the required level of performance, with the energy consumption being a secondary concern. In this thesis, we stress that it is vital t...

  6. A Characterization of Mobility Management in User-centric Networks

    Nascimento, Andrea; Sofia C., Rute; Condeixa, Tiago; Sargento, Susana

    2011-01-01

    Mobility management is a key aspect to consider in future Internet architectures, as these architectures include a highly nomadic end-user which often relies on services provided by multi-access networks. In contrast, today’s mobility management solutions were designed having in mind simpler scenarios and requirements from the network and where roaming could often be taken care of with previously established agreements. With a more dynamic behavior in the network, and also with a more p...

  7. Personalising Mobile Advertising Based on Users Installed Apps

    Reps, Jenna; Aickelin, Uwe; Garibaldi, Jonathan M.; Damski, Chris

    2015-01-01

    Mobile advertising is a billion pound industry that is rapidly expanding. The success of an advert is measured based on how users interact with it. In this paper we investigate whether the application of unsupervised learning and association rule mining could be used to enable personalised targeting of mobile adverts with the aim of increasing the interaction rate. Over May and June 2014 we recorded advert interactions such as tapping the advert or watching the whole advert video along with t...

  8. User-Centric Indoor Air Quality Monitoring on Mobile Devices

    Jiang, Yifei; University of Colorado, Boulder; Li, Kun; University of Colorado, Boulder; Piedrahita, Ricardo; University of Colorado, Boulder; Yun, Xiang; University of Michigan; Tian, Lei; University of Colorado, Boulder; Mansata, Omkar M.; University of Michigan; Lv, Qin; University of Colorado, Boulder; Dick, Robert P.; University of Michigan; Hannigan, Michael; University of Colorado, Boulder; Shang, Li; University of Colorado, Boulder

    2013-01-01

    Since people spend a majority of their time indoors, indoor air quality (IAQ) can have a significant impact on human health, safety, productivity, and comfort. Due to the diversity and dynamics of people's indoor activities, it is important to monitor IAQ for each individual. Most existing air quality sensing systems are stationary or focus on outdoor air quality. In contrast, we propose MAQS, a user-centric mobile sensing system for IAQ monitoring. MAQS users carry portable, indoor location ...

  9. Fuzzy Logic Based Multi User Adaptive Test System

    2014-01-01

    The present proliferation of e-learning has been actively underway for the last 10 years. Current research in Adaptive Testing System focuses on the development of psychometric models with items selection strategies applicable to adaptive testing processes. The key aspect of proposed Adaptive Testing System is to develop an increasingly sophisticated latent trait model which can assist users in developing and enhancing their skills. Computerized Adaptive Test (CAT) System requires a lot of in...

  10. How Users Adapt to Natural Language Interfaces

    Karlgren, Jussi

    1992-01-01

    Posing complex database queries in informal natural language is a nontrivial task, and users have to learn a language to do this in. This study of natural language database queries indicates that people seem to recycle vocabulary and even syntactic constructions from the system output. A consequence for system design is that an interactive system should output language that a user can use, and set right interaction breakdowns with examples of acceptable language rathe...

  11. Utilization Possibilities of Area Definition in User Space for User-Centric Pervasive-Adaptive Systems

    Krejcar, Ondrej

    The ability to let a mobile device determine its location in an indoor environment supports the creation of a new range of mobile information system applications. The goal of my project is to complement the data networking capabilities of RF wireless LANs with accurate user location and tracking capabilities for user needed data prebuffering. I created a location based system enhancement for locating and tracking users of indoor information system. User position is used for data prebuffering and pushing information from a server to his mobile client. All server data is saved as artifacts (together) with its indoor position information. The area definition for artifacts selecting is described for current and predicted user position along with valuating options for artifacts ranging. Future trends are also discussed.

  12. A user profile ontology based approach for assisting people with dementia in mobile environments.

    Skillen, Kerry-Louise; Chen, Liming; Nugent, Chris D; Donnelly, Mark P; Solheim, Ivar

    2012-01-01

    Personalization and context-aware applications have attracted increasing amounts of attention over recent years due to the emergence of pervasive computing applications. Nevertheless, it still remains a challenge to meet the needs of users while they are on the move. This paper introduces a novel approach for providing personalized, context-aware assistance services for users in mobile environments. Central to the approach is the use of ontological user profile modeling which captures various characteristics of a user in order to create a unique set of profile information. In addition, user profiles can adapt to changing user behavior, thus enabling services to respond to evolving user needs and preferences. We describe the overall system architecture of the proposed approach with special emphasis being placed on the user profile modelling and its expected utility based on a typical use case scenario, i.e., using a smart-phone to address the problem of the outdoor mobility of a person with Dementia. A prototype based on the Android OS is used to illustrate the application. The use of everyday technology for a real world problem highlights the potential and utility of our approach. PMID:23367391

  13. Adaptive Mobile Positioning in WCDMA Networks

    Dong B.

    2005-01-01

    Full Text Available We propose a new technique for mobile tracking in wideband code-division multiple-access (WCDMA systems employing multiple receive antennas. To achieve a high estimation accuracy, the algorithm utilizes the time difference of arrival (TDOA measurements in the forward link pilot channel, the angle of arrival (AOA measurements in the reverse-link pilot channel, as well as the received signal strength. The mobility dynamic is modelled by a first-order autoregressive (AR vector process with an additional discrete state variable as the motion offset, which evolves according to a discrete-time Markov chain. It is assumed that the parameters in this model are unknown and must be jointly estimated by the tracking algorithm. By viewing a nonlinear dynamic system such as a jump-Markov model, we develop an efficient auxiliary particle filtering algorithm to track both the discrete and continuous state variables of this system as well as the associated system parameters. Simulation results are provided to demonstrate the excellent performance of the proposed adaptive mobile positioning algorithm in WCDMA networks.

  14. User's proximity effects for talk mode in mobile phones

    Pelosi, Mauro; B. Knudsen, Mikael; Pedersen, Gert Frølund

    Thanks to a recent grip study, 3D CAD model of the human hand have been generated, investigating user's proximity effects for talk mode in mobile phones. The simulation results show that the human hand exhibits a major contribution in determining the total loss when compared to the phantom head...

  15. A Refined Experience Sampling Method to Capture Mobile User Experience

    Cherubini, Mauro; Oliver, Nuria

    2009-01-01

    This paper reviews research methods used to understand the user experience of mobile technology. The paper presents an improvement of the Experience Sampling Method and case studies supporting its design. The paper concludes with an agenda of future work for improving research in this field. Keywords: Research methods, topology, case study, contrasting graph, Experience Sampling Method

  16. Study of some physiological parameters among mobile phone users

    Forty male mobile users in additional to twenty males as control group similar in age and socio economically matched were chosen for this study. Blood pressure, complete blood picture, five parameters of semen quality and four sex hormones (LH, FSH, prolactin and testosterone)were measured. Elevated significant differences for blood pressure (P<0.01) for the exposed group and some changes in mean values of haematologic parameters, although all values were within the normal range. Minor semen quality and hormonal levels changes between the two groups, including a higher mean follicle-stimulating hormone level; for mobile users (8.10 vs 6.00 mIU/mL), and a slightly higher mean luteinizing hormone level (11.73 vs 10.16 mLU/mL) were noted in the user group

  17. Creation and documentation analysis of Mobile shopper guide system: administrative and user portal

    Charževskytė, Egidija

    2008-01-01

    Mobile shopper guide system consists of two parts mainly: mobile map, administrative and user portal. Mobile map consists of Vilnius city map and the points, which shows the location of the shops. Administrative and user portal supports mobile map. In the paper the analysis of documentation templates was done.During this work administrative and user portal was created and analyzed.

  18. Entropy-Based Privacy against Profiling of User Mobility

    Alicia Rodriguez-Carrion

    2015-06-01

    Full Text Available Location-based services (LBSs flood mobile phones nowadays, but their use poses an evident privacy risk. The locations accompanying the LBS queries can be exploited by the LBS provider to build the user profile of visited locations, which might disclose sensitive data, such as work or home locations. The classic concept of entropy is widely used to evaluate privacy in these scenarios, where the information is represented as a sequence of independent samples of categorized data. However, since the LBS queries might be sent very frequently, location profiles can be improved by adding temporal dependencies, thus becoming mobility profiles, where location samples are not independent anymore and might disclose the user’s mobility patterns. Since the time dimension is factored in, the classic entropy concept falls short of evaluating the real privacy level, which depends also on the time component. Therefore, we propose to extend the entropy-based privacy metric to the use of the entropy rate to evaluate mobility profiles. Then, two perturbative mechanisms are considered to preserve locations and mobility profiles under gradual utility constraints. We further use the proposed privacy metric and compare it to classic ones to evaluate both synthetic and real mobility profiles when the perturbative methods proposed are applied. The results prove the usefulness of the proposed metric for mobility profiles and the need for tailoring the perturbative methods to the features of mobility profiles in order to improve privacy without completely loosing utility.

  19. Analyzing User Awareness of Privacy Data Leak in Mobile Applications

    Youngho Kim

    2015-01-01

    Full Text Available To overcome the resource and computing power limitation of mobile devices in Internet of Things (IoT era, a cloud computing provides an effective platform without human intervention to build a resource-oriented security solution. However, existing malware detection methods are constrained by a vague situation of information leaks. The main goal of this paper is to measure a degree of hiding intention for the mobile application (app to keep its leaking activity invisible to the user. For real-world application test, we target Android applications, which unleash user privacy data. With the TaintDroid-ported emulator, we make experiments about the timing distance between user events and privacy leaks. Our experiments with Android apps downloaded from the Google Play show that most of leak cases are driven by user explicit events or implicit user involvement which make the user aware of the leakage. Those findings can assist a malware detection system in reducing the rate of false positive by considering malicious intentions. From the experiment, we understand better about app’s internal operations as well. As a case study, we also presents a cloud-based dynamic analysis framework to perform a traffic monitor.

  20. UCSB FEL user mode adaption project

    Jaccarino, Vincent

    1992-04-01

    This research sponsored by the SDIO Biomedical and Materials Sciences FEL Program held the following objectives: Provide a facility in which in-house and outside user research in the materials and biological sciences can be carried out in the Far Infrared using-the unique properties of the UCSB electrostatic accelerator-driven FEL; Develop and implement new FEL concepts and FIR technology and encourage the transfer and application of this research; Train graduate students, post doctoral researchers and technical personnel in varied aspects of scientific user disciplines, FEL science and FIR technology in a cooperative, interdisciplinary environment. In summary, a free electron laser facility has been developed which is operational from 200 GHz, (6.6 cm exp -1), to 4.8 THz, (160 cm exp -1) tunable under computer control and able to deliver kilowatts of millimeter wave and far-infrared power. This facility has a well equipped user lab that has been used to perform ground breaking experiments in scientific areas as diverse as bio-physics. Nine graduate students and post doctoral researchers have been trained in the operation, use and application of these free-electron lasers.

  1. Prevalence of sensorineural deafness in habitual mobile phone users

    G C Sahoo

    2011-01-01

    Full Text Available Introduction : Mobile phone usage is widespread and concerns have been raised on the safety of its long-term usage. The electromagnetic fields emitted from mobile can penetrate skull and deposit energy 4-6 cm into the brain resulting in heating of the tissue. In this study, we explore a possible relationship between prolonged mobile phone usage and sensorineural deafness. Materials and Methods: The study was conducted in a medical college situated in rural India. A total of 100 persons between the age group of 20-45years using mobile phone for at least 5 years are selected and screened for sensorineural deafness. Use of cellular phones was assessed by a questionnaire. Mean number of daily calls and minutes were asked for to calculate the cumulative use in hours for all years. The most frequently used ear during cellular phone calls was noted, or whether both ears were used equally. Otoscopic examinations were performed by an otolaryngologist before testing in order to rule out any external or middle ear pathology that could affect audiometric measurements. The hearing levels of subjects were tested using pure tone audiometry. Results : One hundred subjects who are habitual mobile phone users were screened by pure tone audiometry. It is found that the prevalence of sensorineural deafness was 3% and there is a linear relationship between the duration of mobile phone use and the degree of the severity of deafness. Conclusion : The prevalence of sensorineural deafness in our study in habitual mobile users is 3%. It is not clearly known whether mobile phone use is the direct cause of deafness in these subjects but the absence of other causes might point towards its etiological role.

  2. Chromosomal aberrations in mobile phone users in Tamilnadu, southern India

    Complete text of publication follows. Radiofrequency (RF) waves have long been used for different types of information exchange via the airwaves-wireless Morse code, radio, television, and wireless telephony. Increasingly larger numbers of people rely on mobile telephone technology, and health concerns about the associated RF exposure have been raised, particularly because the mobile phone handset operates in close proximity to the human body, and also because large numbers of base station antennas are required to provide widespread availability of service to large populations. In the present study chromosomal damage investigations were carried out on the peripheral blood lymphocytes of individuals using mobile phones, being exposed to MW frequency ranging from 800 to 2000 MHz. The aim of this study is to establish whether mobile phone use (n = 27) increases the frequency of chromosome aberrations (CA) in peripheral blood lymphocytes compared with controls (n = 27) in Tamilnadu, India. After signing a consent form, volunteers provided blood samples (5 ml) to establish cell cultures at 52 hrs. For CA analysis, 100 complete metaphase cells from each subject were evaluated. In the present study, in mobile phone users highly significant results were obtained when compared to control groups. These results highlight a correlation between mobile phone use (exposure to RFR) and genetic damage and require interim public health actions in the wake of widespread use of mobile telephony.

  3. Barriers and facilitators to community mobility for assistive technology users.

    Layton, Natasha

    2012-01-01

    Mobility is frequently described in terms of individual body function and structures however contemporary views of disability also recognise the role of environment in creating disability. Aim. To identify consumer perspectives regarding barriers and facilitators to optimal mobility for a heterogeneous population of impaired Victorians who use assistive technology in their daily lives. Method. An accessible survey investigated the impact of supports or facilitators upon actual and desired life outcomes and health-related quality of life, from 100 AT users in Victoria, Australia. This paper reports upon data pertaining to community mobility. Results. A range of barriers and enablers to community mobility were identified including access to AT devices, environmental interventions, public transport, and inclusive community environs. Substantial levels of unmet need result in limited personal mobility and community participation. Outcomes fall short of many principles enshrined in current policy and human rights frameworks. Conclusion. AT devices as well as accessible and inclusive home and community environs are essential to maximizing mobility for many. Given the impact of the environment upon the capacity of individuals to realise community mobility, this raises the question as to whether rehabilitation practitioners, as well as prescribing AT devices, should work to build accessible communities via systemic advocacy. PMID:23029617

  4. Barriers and Facilitators to Community Mobility for Assistive Technology Users

    Natasha Layton

    2012-01-01

    Full Text Available Mobility is frequently described in terms of individual body function and structures however contemporary views of disability also recognise the role of environment in creating disability. Aim. To identify consumer perspectives regarding barriers and facilitators to optimal mobility for a heterogeneous population of impaired Victorians who use assistive technology in their daily lives. Method. An accessible survey investigated the impact of supports or facilitators upon actual and desired life outcomes and health-related quality of life, from 100 AT users in Victoria, Australia. This paper reports upon data pertaining to community mobility. Results. A range of barriers and enablers to community mobility were identified including access to AT devices, environmental interventions, public transport, and inclusive community environs. Substantial levels of unmet need result in limited personal mobility and community participation. Outcomes fall short of many principles enshrined in current policy and human rights frameworks. Conclusion. AT devices as well as accessible and inclusive home and community environs are essential to maximizing mobility for many. Given the impact of the environment upon the capacity of individuals to realise community mobility, this raises the question as to whether rehabilitation practitioners, as well as prescribing AT devices, should work to build accessible communities via systemic advocacy.

  5. Adaptive Mobile Video Streaming and Efficient Social Video Sharing in Cloud

    Mr.Prabhu R

    2014-03-01

    Full Text Available The mobile phones grow to be an essential part of our everyday life, with smart phone sales at present greater than before very much and also user demands to run lots of applications have enhanced. The victory of next invention mobile phone communication based on the capability of service suppliers to engineer innovative added worth to video services. The Streams are programmed by the Scalable Video Coding expansion of the H.264/AVC model. Adding or removing the layer is determined on the basis of user behaviour environment of the mobile system. The current advances in the mobile video streams greater than mobile networks have been souring more than these new trends, the wireless connection service not basically hold up with the rising traffic demand. The hole among the traffic load and the wireless connection facility, along with time-changeable link circumstances, results reduced superiority of mobile video streams more than mobile networks, such as extensive buffering delays and discontinuous disruptions. The innovative cloud computing technology, we suggest a novel framework to get enhanced quality of video services for the mobile users, which has two parts: A newly distributed web User Behaviour Prediction model is bring in to cognize and guess user behaviour and additional Adaptive Policy Pre-fetching and Caching method is addressed for a well-organized cloud supervision. We can able to apply a new framework model to illustrate significant development in terms of lesser loss rate, decrease delay and buffering time. For all mobile user, make a private agent in the cloud data centre to alter the mobile video streams flow by the Scalable Video Coding method based on the reply from the mobile customer and perform the video prefetching based on the social network examination. In addition, the essential tools for providing temporal, spatial, and quality are described in feature and experimentally analyse their difficulty and effectiveness.

  6. LTE Adaptation for Mobile Broadband Satellite Networks

    Bastia Francesco

    2009-01-01

    Full Text Available One of the key factors for the successful deployment of mobile satellite systems in 4G networks is the maximization of the technology commonalities with the terrestrial systems. An effective way of achieving this objective consists in considering the terrestrial radio interface as the baseline for the satellite radio interface. Since the 3GPP Long Term Evolution (LTE standard will be one of the main players in the 4G scenario, along with other emerging technologies, such as mobile WiMAX; this paper analyzes the possible applicability of the 3GPP LTE interface to satellite transmission, presenting several enabling techniques for this adaptation. In particular, we propose the introduction of an inter-TTI interleaving technique that exploits the existing H-ARQ facilities provided by the LTE physical layer, the use of PAPR reduction techniques to increase the resilience of the OFDM waveform to non linear distortion, and the design of the sequences for Random Access, taking into account the requirements deriving from the large round trip times. The outcomes of this analysis show that, with the required proposed enablers, it is possible to reuse the existing terrestrial air interface to transmit over the satellite link.

  7. A modified decision tree algorithm based on genetic algorithm for mobile user classification problem.

    Liu, Dong-sheng; Fan, Shu-jiang

    2014-01-01

    In order to offer mobile customers better service, we should classify the mobile user firstly. Aimed at the limitations of previous classification methods, this paper puts forward a modified decision tree algorithm for mobile user classification, which introduced genetic algorithm to optimize the results of the decision tree algorithm. We also take the context information as a classification attributes for the mobile user and we classify the context into public context and private context classes. Then we analyze the processes and operators of the algorithm. At last, we make an experiment on the mobile user with the algorithm, we can classify the mobile user into Basic service user, E-service user, Plus service user, and Total service user classes and we can also get some rules about the mobile user. Compared to C4.5 decision tree algorithm and SVM algorithm, the algorithm we proposed in this paper has higher accuracy and more simplicity. PMID:24688389

  8. Earthquake Early Warning Beta Users: Java, Modeling, and Mobile Apps

    Strauss, J. A.; Vinci, M.; Steele, W. P.; Allen, R. M.; Hellweg, M.

    2014-12-01

    Earthquake Early Warning (EEW) is a system that can provide a few to tens of seconds warning prior to ground shaking at a user's location. The goal and purpose of such a system is to reduce, or minimize, the damage, costs, and casualties resulting from an earthquake. A demonstration earthquake early warning system (ShakeAlert) is undergoing testing in the United States by the UC Berkeley Seismological Laboratory, Caltech, ETH Zurich, University of Washington, the USGS, and beta users in California and the Pacific Northwest. The beta users receive earthquake information very rapidly in real-time and are providing feedback on their experiences of performance and potential uses within their organization. Beta user interactions allow the ShakeAlert team to discern: which alert delivery options are most effective, what changes would make the UserDisplay more useful in a pre-disaster situation, and most importantly, what actions users plan to take for various scenarios. Actions could include: personal safety approaches, such as drop cover, and hold on; automated processes and procedures, such as opening elevator or fire stations doors; or situational awareness. Users are beginning to determine which policy and technological changes may need to be enacted, and funding requirements to implement their automated controls. The use of models and mobile apps are beginning to augment the basic Java desktop applet. Modeling allows beta users to test their early warning responses against various scenarios without having to wait for a real event. Mobile apps are also changing the possible response landscape, providing other avenues for people to receive information. All of these combine to improve business continuity and resiliency.

  9. On adaptive control of mobile slotted aloha networks

    Lim J.-T.

    1995-01-01

    Full Text Available An adaptive control scheme for mobile slotted ALOHA is presented and the effect of capture on the adaptive control scheme is investigated. It is shown that with the proper choice of adaptation parameters the adaptive control scheme can be made independent of the effect of capture.

  10. MuZeeker - Adapting a music search engine for mobile phones

    Larsen, Jakob Eg; Halling, Søren Christian; Sigurdsson, Magnus Kristinn;

    2010-01-01

    We describe MuZeeker, a search engine with domain knowledge based on Wikipedia. MuZeeker enables the user to refine a search in multiple steps by means of category selection. In the present version we focus on multimedia search related to music and we present two prototype search applications (web......-based and mobile) and discuss the issues involved in adapting the search engine for mobile phones. A category based filtering approach enables the user to refine a search through relevance feedback by category selection instead of typing additional text, which is hypothesized to be an advantage in the...... mobile MuZeeker application. We report from two usability experiments using the think aloud protocol, in which N=20 participants performed tasks using MuZeeker and a customized Google search engine. In both experiments web-based and mobile user interfaces were used. The experiment shows that participants...

  11. MuZeeker - Adapting a music search engine for mobile phones

    Larsen, Jakob Eg; Halling, Søren Christian; Sigurdsson, Magnus Kristinn; Hansen, Lars Kai

    We describe MuZeeker, a search engine with domain knowledge based on Wikipedia. MuZeeker enables the user to refine a search in multiple steps by means of category selection. In the present version we focus on multimedia search related to music and we present two prototype search applications (web......-based and mobile) and discuss the issues involved in adapting the search engine for mobile phones. A category based filtering approach enables the user to refine a search through relevance feedback by category selection instead of typing additional text, which is hypothesized to be an advantage in the...... mobile MuZeeker application. We report from two usability experiments using the think aloud protocol, in which N=20 participants performed tasks using MuZeeker and a customized Google search engine. In both experiments web-based and mobile user interfaces were used. The experiment shows that participants...

  12. Knowledge on adaptation process of users of hearing aid

    Sant'Anna, Leandro Machado

    2008-09-01

    Full Text Available Introduction: Professionals that work in this area know how important the orientation to the use of auditory device is, which involves the care required to handle and use the equipment and aspects aiming at the adaptation. Objective: To compare the knowledge of both long-term and new users about the adaptation process to the use of auditory device, so as to provide speech and language pathologists with a greater knowledge about the aspects that most influence the adaptation process. Method: This research is an observational, descriptive, cross-sectional, contemporary, retrospective study. The new and old users answered a questionnaire with information on the auditory device conservation and the adaptation process. The results were compared quantitatively through statistical review and qualitatively. Results: The age of the individuals in this study varied between 28 and 90 years. In some aspects, old and new users presented the same knowledge level. Conclusion: New users of auditory devices have been looking for hearing (re habilitation increasingly later. The action of phonoaudiology in the process of selection and adaptation to auditory devices among experienced and new users is extremely important to an effective acclimatization.

  13. Access point selection game with mobile users using correlated equilibrium.

    Sohn, Insoo

    2015-01-01

    One of the most important issues in wireless local area network (WLAN) systems with multiple access points (APs) is the AP selection problem. Game theory is a mathematical tool used to analyze the interactions in multiplayer systems and has been applied to various problems in wireless networks. Correlated equilibrium (CE) is one of the powerful game theory solution concepts, which is more general than the Nash equilibrium for analyzing the interactions in multiplayer mixed strategy games. A game-theoretic formulation of the AP selection problem with mobile users is presented using a novel scheme based on a regret-based learning procedure. Through convergence analysis, we show that the joint actions based on the proposed algorithm achieve CE. Simulation results illustrate that the proposed algorithm is effective in a realistic WLAN environment with user mobility and achieves maximum system throughput based on the game-theoretic formulation. PMID:25785726

  14. Development of Adaptive Kanji Learning System for Mobile Phone

    Li, Mengmeng; Ogata, Hiroaki; Hou, Bin; Hashimoto, Satoshi; Liu, Yuqin; Uosaki, Noriko; Yano, Yoneo

    2010-01-01

    This paper describes an adaptive learning system based on mobile phone email to support the study of Japanese Kanji. In this study, the main emphasis is on using the adaptive learning to resolve one common problem of the mobile-based email or SMS language learning systems. To achieve this goal, the authors main efforts focus on three aspects:…

  15. Entropy-Based Privacy against Profiling of User Mobility

    Alicia Rodriguez-Carrion; David Rebollo-Monedero; Jordi Forné; Celeste Campo; Carlos Garcia-Rubio; Javier Parra-Arnau; Das, Sajal K

    2015-01-01

    Location-based services (LBSs) flood mobile phones nowadays, but their use poses an evident privacy risk. The locations accompanying the LBS queries can be exploited by the LBS provider to build the user profile of visited locations, which might disclose sensitive data, such as work or home locations. The classic concept of entropy is widely used to evaluate privacy in these scenarios, where the information is represented as a sequence of independent samples of categorized data. However, sinc...

  16. Adaptive Device Context Based Mobile Learning Systems

    Pu, Haitao; Lin, Jinjiao; Song, Yanwei; Liu, Fasheng

    2011-01-01

    Mobile learning is e-learning delivered through mobile computing devices, which represents the next stage of computer-aided, multi-media based learning. Therefore, mobile learning is transforming the way of traditional education. However, as most current e-learning systems and their contents are not suitable for mobile devices, an approach for…

  17. Adaptive scheduling with postexamining user selection under nonidentical fading

    Gaaloul, Fakhreddine

    2012-11-01

    This paper investigates an adaptive scheduling algorithm for multiuser environments with statistically independent but nonidentically distributed (i.n.d.) channel conditions. The algorithm aims to reduce feedback load by sequentially and arbitrarily examining the user channels. It also provides improved performance by realizing postexamining best user selection. The first part of the paper presents new formulations for the statistics of the signal-to-noise ratio (SNR) of the scheduled user under i.n.d. channel conditions. The second part capitalizes on the findings in the first part and presents various performance and processing complexity measures for adaptive discrete-time transmission. The results are then extended to investigate the effect of outdated channel estimates on the statistics of the scheduled user SNR, as well as some performance measures. Numerical results are provided to clarify the usefulness of the scheduling algorithm under perfect or outdated channel estimates. © 1967-2012 IEEE.

  18. Personal drivers and factors influencing the attitude toward mobile advertising: A Study on Mobile phone users

    Manijeh Bahrainizadeh; Abdolmajid Mosleh; Adel Pourdehghan

    2014-01-01

    Today, mobile advertising is considered one of the most important and influential marketing activities, because marketers through the small media ability to individual access and have direct contact with users at any time and place. In this regard, businesses need to focus on the lead to effective results advertise acceptance by customers according to their needs and tendencies. The aim of this study is to analyze individual drivers influencing attitudes toward mobile advertising. The pres...

  19. Adaptive learning fuzzy control of a mobile robot

    In this report a problem is studied to construct a fuzzy controller for a mobile robot to move autonomously along a given reference direction curve, for which control rules are generated and acquired through an adaptive learning process. An adaptive learning fuzzy controller has been developed for a mobile robot. Good properties of the controller are shown through the travelling experiments of the mobile robot. (author)

  20. A NFR-based Framework for User-Centered Adaptation

    Dalpiaz F; Serral E.; Valderas P.; Giorgini P.; Pelechano V.

    2012-01-01

    Pervasive environments support users’ daily routines in an invisible and unobtrusive way. To do so, they include a technical pervasive infrastructure, which is aware of and adaptive to both the operational context and the users at hand. Non-Functional Requirements (NFRs) have been effectively used to inform decision-making in software engineering: functional alternatives are compared in terms of their contribution to NFRs satisfaction. In this work, we consider user preferences over NFRs as a...

  1. Learning User Intention in Networked Mobile Robot Control

    2007-01-01

    Teleoperated networked robot often has unpredictable behaviors due to uncertain time delay from data transmission over Internet. The robot cannot accomplish the desired actions of the remote operator in time, which severely impairs reliability and efficiency of the robot system. This paper investigated a novel approach, learning user intention, to compensate the uncertain time delay with the autonomy of a mobile robot. The user intention to control and operate the robot was modeled and incrementally inferred based on Bayesian techniques so that the desired actions could be recognized and completed by the robot autonomously. Thus the networked robot is able to fulfill the task assigned without frequent interaction with the user, which decreases data transmission and improves the efficiency of the whole system. Experimental results show the validity and feasibility of the proposed method.

  2. OneWeb: web content adaptation platform based on W3C Mobile Web Initiative guidelines

    Francisco O. Martínez P.

    2011-01-01

    Full Text Available  Restrictions regardingnavigability and user-friendliness are the main challenges the Mobile Web faces to be accepted worldwide. W3C has recently developed the Mobile Web Initiative (MWI, a set of directives for the suitable design and presentation of mobile Web interfaces. This article presents the main features and functional modules of OneWeb, an MWI-based Web content adaptation platform developed by Mobile Devices Applications Development Interest Group’s  (W@PColombia research activities, forming part of the Universidad de Cauca’s Telematics Engineering Group.Some performance measurementresults and comparison with other Web content adaptation platforms are presented. Tests have shown suitable response times for Mobile Web environments; MWI guidelines were applied to over twenty Web pages selected for testing purposes.  

  3. Learner Open Modeling in Adaptive Mobile Learning System for Supporting Student to Learn English

    Van Cong Pham

    2011-10-01

    Full Text Available This paper represents a personalized context-aware mobile learning architecture for supporting student to learn English as foreign language in order to prepare for TOEFL test. We consider how to apply open learner modeling techniques to adapt contents for different learners based on context, which includes location, amount of time to learn, the manner as well as learner's knowledge in learning progress. Through negotiation with system, the editable learner model will be updated to support adaptive engine to select adaptive contents meeting learner's demands. Empirical testing results for students who used application prototype indicate that interaction user modeling is helpful in supporting learner to learn adaptive materials.

  4. Distributed Demand Response and User Adaptation in Smart Grids

    Fan, Zhong

    2010-01-01

    This paper proposes a distributed framework for demand response and user adaptation in smart grid networks. In particular, we borrow the concept of congestion pricing in Internet traffic control and show that pricing information is very useful to regulate user demand and hence balance network load. User preference is modeled as a willingness to pay parameter which can be seen as an indicator of differential quality of service. Both analysis and simulation results are presented to demonstrate the dynamics and convergence behavior of the algorithm.

  5. Developing a Mobile Adaptive Test (MAT in an M-Learning Environment for Android Based 3G Mobile Devices

    Shanmugapriya M

    2012-02-01

    Full Text Available M-Learning (e-Learning through mobile device is gaining its importance worldwide among the Learning Community owing to the ubiquitous and powerful computing nature of the Mobile Devices.In an M-Learning environment, Student Assessment and Evaluation of their knowledge acquisition is a vital factor. Adaptive Testing helps the instructor to obtain an accurate estimation of the student’s levelof knowledge and learning ability. The significant advantage of Adaptive Tests is that each student receives different questions and the number of questions also varies depending on their performancelevel. The tests are designed according to the instructor’s specification for the selection of question, the marks awarded for each question and the evaluation technique. The Adaptive Tests have to include various question and answer formats like drop down list, fill-in the blanks, Yes/No and multiple choice question etc. and the test content should support multimedia objects. The Android Platform for 3rd Generation Mobile Devices provides a rich set of User Interfaces (UI, gestures and 2-D and 3-D graphic capabilities. The goal of this paper is to design and evaluate the Mobile Adaptive Test (MAT in an MLearning environment for Android Based Mobile Devices.

  6. Location Aware Opportunistic Bandwidth Sharing between Static and Mobile Users with Stochastic Learning in Cellular Networks

    Chattopadhyay, Arpan; Błaszczyszyn, Bartłomiej; Altman, Eitan

    2016-01-01

    We consider location-dependent opportunistic bandwidth sharing between static and mobile downlink users in a cellular network. Each cell has some fixed number of static users. Mobile users enter the cell, move inside the cell for some time and then leave the cell. In order to provide higher data rate to mobile users, we propose to provide higher bandwidth to the mobile users at favourable times and locations, and provide higher bandwidth to the static users in other times. We formulate the pr...

  7. Extraction of Web Content to Adapt Web Pages for Mobile Devices

    Neha Gupta

    2011-03-01

    Full Text Available Now a day's mobile phones are replacing conventional PCs' as users are browsing and searching the Internet via their mobile handsets. Web based services and information can be accessed from any location with the help of these Mobile devices such as mobile phones, Personal Digital Assistants (PDA with relative ease. To access the educational data on mobile devices, web page adaptation is needed, keeping in mind security and quality of data. Various researchers are working on adaptation techniques. Educational web miner aims to develop an interface for kids to use mobile devices in a secure way. This paper presents a framework for adapting the web pages as part of educational web miner so that educational data can be accessed accurately, securely and concisely. The present paper is a part of the project whose aim is to develop an interface for kids, so that they can access the current knowledge bases from mobile devices in a secure way and to get accurate and concise information at ease. The related studies for adaptation technique are also presented in this paper.

  8. A user interface for mobile robotized tele-echography

    Ultrasound imaging allows the evaluation of the degree of emergency of a patient. However, in many situations no experienced sonographer is available to perform such echography. To cope with this issue, the OTELO project 'mObile Tele-Echography using an ultra-Light rObot' (OTELO) aims to develop a fully integrated end-to-end mobile tele-echography system using an ultralight, remotely controlled six degree-of-freedom (DOF) robot. In this context, this paper deals with the user interface environment of the OTELO system, composed by the following parts: an ultrasound video transmission system providing real-time images of the scanned area at each moment, an audio/video conference to communicate with the paramedical assistant and the patient, and finally a virtual reality environment, providing visual and haptic feedback to the expert, while capturing the expert's hand movements with a one-DOF hand free input device

  9. A Modified Decision Tree Algorithm Based on Genetic Algorithm for Mobile User Classification Problem

    Dong-sheng Liu; Shu-jiang Fan

    2014-01-01

    In order to offer mobile customers better service, we should classify the mobile user firstly. Aimed at the limitations of previous classification methods, this paper puts forward a modified decision tree algorithm for mobile user classification, which introduced genetic algorithm to optimize the results of the decision tree algorithm. We also take the context information as a classification attributes for the mobile user and we classify the context into public context and private context cla...

  10. Evaluating the user experience in mobile games using session recording tools

    Börjesson, Veronica; Jonsson, Karolin

    2015-01-01

    This thesis work examines how the user experience of mobile games can be evaluated with the use of session recording tools. The thesis project was carried out at the mobile games development company MAG Interactive, and the aim was to produce a workflow for the company with guidelines for how to conduct user testing with session recording tools for mobile devices. In order to evaluate the tools and services, and to develop the workflow, several user tests have been conducted. When using mobil...

  11. [Spanish adaptation of the "Mobile Phone Problem Use Scale" for adolescent population].

    López-Fernández, Olatz; Honrubia-Serrano, Ma Luisa; Freixa-Blanxart, Montserrat

    2012-01-01

    Problematic use of the mobile telephone is an emerging phenomenon in our society, and one which particularly affects the teenage population. Knowledge from research on the problematic use of this technology is necessary, since such use can give rise to a behavioural pattern with addictive characteristics. There are hardly any scales for measuring possible problematic use of mobile phones, and none at all adapted exclusively for the Spanish adolescent population. The scale most widely used internationally is the Mobile Phone Problem Use Scale (MPPUS). The aim of the present study is to adapt the MPPUS for use with Spanish adolescents. The Spanish version of the questionnaire was administered to a sample of 1132 adolescents aged 12 to 18. Reliability and factorial validity were comparable to those obtained in adult population, so that the measure of problematic mobile phone use in Spanish teenagers is one-dimensional. A prevalence of 14.8% of problematic users was detected. PMID:22648315

  12. Mobile Tourism Consumer Profile: An approach to experienced users

    M. Vallespín-Arán

    2015-11-01

    Full Text Available The aim of this paper is to analyze socio demographic and behavioral variables that affect the use of mobile commerce for travel planning. From the review of the theoretical framework and the empirical analysis, the influence of some of the variables traditionally used as segmentation variables is shown. Based on an online survey of 616 tourism consumers services who use a smartphone, we discovered that these consumers present different characteristics related to the following variables: a experience of using Internet via mobile phone, b age, c family life cycle, d employment status, e hours of Internet access, f trips done per year, g number of people living in the household and h household income. Practical implications for tourism companies are reached which allow companies to adapt better segmentation strategies to each target market.

  13. Adaptive Approaches to Context Aware Mobile Learning Applications

    P. Govindarajulu

    2008-04-01

    Full Text Available Learning has gone through major changes from its inception in the human race. Among all such major changes mobile learning is the latest to happen with the advent of mobile learning technologies that have the potential to revolutionize distance education by bringing the concept of anytime and anywhere to reality. From the learner’s perceptive, mobile learning is “any sort of leaning that happens when the learner is not at a fixed, pre-determined location or learning that happens when the learner takes advantage of learning opportunities offered by mobile technologies”. Research in context aware mobile learning has concentrated on how to adapt applications to context. This paper reviews and discusses few mobile learning systems the approach in implementing context awareness and adaptation

  14. Weather effects on mobile social interactions: a case study of mobile phone users in Lisbon, Portugal

    Phithakkitnukoon, Santi; Leong, Tuck; Smoreda, Zbigniew; Olivier, Patrick

    2012-01-01

    The effect of weather on social interactions has been explored through the analysis of a large mobile phone use dataset. Time spent on phone calls, numbers of connected social ties, and tie strength were used as proxies for social interactions; while weather conditions were characterized in terms of temperature, relative humidity, air pressure, and wind speed. Our results are based on the analysis of a full calendar year of data for 22,696 mobile phone users (53.2 million call logs) in Lisbon...

  15. High dynamic adaptive mobility network model and performance analysis

    LIU Hui; ZHANG Jun

    2008-01-01

    Since mobile networks are not currently deployed on a large scale, research in this area is mostly by simulation. Among other simulation parameters, the mobility model plays a very important role in determining the protocol performance in MANET. Based on random direction mobility model, a high dynamic adaptive mo-bility network model is proposed in the paper. The algorithms and modeling are mainly studied and explained in detail. The technique keystone is that normal dis-tribution is combined with uniform distribution and inertial feedback control is combined with kinematics, through the adaptive control on nodes speed and pre-diction tracking on nodes routes, an adaptive model is designed, which can be used in simulations to produce realistic and dynamic network scenarios. It is the adaptability that nodes mobile parameters can be adjusted randomly in three-dimensional space. As a whole, colony mobility can show some rules. Such ran-dom movement processes as varied speed and dwells are simulated realistically. Such problems as sharp turns and urgent stops are smoothed well. The model can be adapted to not only common dynamic scenarios, but also high dynamic sce-narios. Finally, the mobility model performance is analyzed and validated based on random dynamic scenarios simulations.

  16. Adaptive Multimedia Learning Delivered in Mobile Cloud Computing Environment

    Karadimce, Aleksandar; Davcev, Danco

    2013-01-01

    Abstract: Abstract— The process of integrating multimedia files, such as different types of learning objects (video, images, audio, animation, etc.) to m-learning systems requires more computational resources than mobile devices can provide. Considering mobile device limitations, such as storage, computing power and bandwidth, we propose a mobile cloud computing in order to deliver adaptive multimedia learning courses to students. In this paper, we propose a PaaS cloudbased framework, w...

  17. Revised and Extended Mobile Commerce Technology Adaption Model

    Mohammad Othman Nassar; Feras Fares Al Mashagba; Mohammad Ali Habahbeh; Eman Fares Al Mashagba

    2014-01-01

    This research is designed to cover literature gaps in the intention to adopt mobile commerce in Jordan as development country. In one hand we explored and identified the non-technological factors that affect the intention to adopt mobile commerce. In the other hand we introduced a revised and extended mobile commerce technology adaption model based on the available literature and based on the Technology Acceptance Model (TAM). Our result shows that our proposed model is valid. Our model valid...

  18. Developing a responsive mobile-first design guide for e-commerce with the users in focus

    Aktan, Mathias; Wirén-Hallqvist, Ulf

    2014-01-01

    Mobile e-commerce is an increasing trend. Still, many sales sites are not adapted to mobile interfaces. Important factors in the design of successful e-commerce applications are trust, high quality graphics, and easy navigation. However, a typical design approach is to strip down functionality and this can have a negative impact on the user experience. The goal of this thesis was to create a style guide that can be used to develop responsive e-commerce sites through a mobile first implementat...

  19. Mobile Phone Programming-Based on Mobile Sensor API for User Interface

    Bai, Gang

    2010-01-01

    Recently, it is a popular trend to incorporate sensors into personal consumer devices. This action provides more interaction with users and optimizes users’ experiences. For instance, the remote controller of Wii employs an accelerometer that enables players to simulate motions in real life. The ipod touch can automatically change the screen to display vertically or horizontally according to the placement of the device. Also, various kinds of sensors are embedded in mobile devices to provi...

  20. Model based approach for context aware and adaptive user interface generation

    Hanumansetty, Reena Gowri

    2004-01-01

    User interface design and development for ubiquitous software applications is challenged by the presence of varying contexts. Context comprises of user'­s computing platform, the environment in which the user is interacting with the application and user characteristics which comprise of user's behavior during interaction and user preferences for interface display and interaction. We present a framework for adaptive user interface generation where adaptation occurs when context changes. ...

  1. A New Adaptive Checkpointing Strategy for Mobile Computing

    MENChaoguang; ZUODecheng; YANGXiaozong

    2005-01-01

    Adaptive checkpointing strategy is an efficient recovery scheme, which is suitable for mobile computing system. However, all existing adaptive checkpointing schemes are not correct to recover system when failure occurs in some special period. In this paper, the issues that will lead to system inconsistency are first discussed and then a new adaptive strategy that can recover system to correct consistent state is proposed. Our algorithm improves system recovery performance because only failure process needs rollback through logging.

  2. A user interface for mobile robotized tele-echography

    Triantafyllidis, G.A. [Informatics and Telematics Institute ITI-CERTH, Thessaloniki (Greece)]. E-mail: gatrian@iti.gr; Thomos, N. [Informatics and Telematics Institute ITI-CERTH, Thessaloniki (Greece); Canero, C. [Computer Vision Center, UAB, Barcelona (Spain); Vieyres, P. [Laboratoire Vision and Robotique Universite d' Orleans, Bourges (France); Strintzis, M.G. [Informatics and Telematics Institute ITI-CERTH, Thessaloniki (Greece)

    2006-12-20

    Ultrasound imaging allows the evaluation of the degree of emergency of a patient. However, in many situations no experienced sonographer is available to perform such echography. To cope with this issue, the OTELO project 'mObile Tele-Echography using an ultra-Light rObot' (OTELO) aims to develop a fully integrated end-to-end mobile tele-echography system using an ultralight, remotely controlled six degree-of-freedom (DOF) robot. In this context, this paper deals with the user interface environment of the OTELO system, composed by the following parts: an ultrasound video transmission system providing real-time images of the scanned area at each moment, an audio/video conference to communicate with the paramedical assistant and the patient, and finally a virtual reality environment, providing visual and haptic feedback to the expert, while capturing the expert's hand movements with a one-DOF hand free input device.

  3. Image Content in Location-Based Shopping Recommender Systems For Mobile Users

    Tranos Zuva; Sunday O. Ojo; Seleman M. Ngwira; Oludayo O. Olugbara

    2012-01-01

    This paper shows how image content can be used to realize a shopping recommender system for intuitively supporting mobile users in decision making. A mobile user equipped with a camera enabled smart phone combined with Global Positioning System (GPS) capabilities would benefit in using a recommender system for mobile users. This recommender system is queried by image sent by a smart phone together with the smart phone’s GPS coordinates then the system returns a recommended retail shop togethe...

  4. Do Smartphone Power Users Protect Mobile Privacy Better than Nonpower Users? Exploring Power Usage as a Factor in Mobile Privacy Protection and Disclosure.

    Kang, Hyunjin; Shin, Wonsun

    2016-03-01

    This study examines how consumers' competence at using smartphone technology (i.e., power usage) affects their privacy protection behaviors. A survey conducted with smartphone users shows that power usage influences privacy protection behavior not only directly but also indirectly through privacy concerns and trust placed in mobile service providers. A follow-up experiment indicates that the effects of power usage on smartphone users' information management can be a function of content personalization. Users, high on power usage, are less likely to share personal information on personalized mobile sites, but they become more revealing when they interact with nonpersonalized mobile sites. PMID:26783875

  5. Mobile user environment and satellite diversity for NGSO S-PCN's

    Werner, Markus; Bischl, Hermann; Lutz, Erich

    1995-01-01

    The performance of satellite diversity under the influence of the mobile user environment is analyzed. To this end, a digital channel model is presented which takes into account the elevation angle as well as the user mobility in a given environment. For different LEO and MEO systems and for varying mobile user environments, some crucial benefits and drawbacks of satellite diversity are discussed. Specifically, the important GW service area concept is introduced. The conclusions are validated by numerical results from computer simulations. Globalstar (LEO) and Inmarsat (MEO) are compared in terms of visibility, service availability and equivalent handover complexity for different environments and user mobility.

  6. A Context-Aware Mobile User Behavior-Based Neighbor Finding Approach for Preference Profile Construction

    Qian Gao

    2016-01-01

    Full Text Available In this paper, a new approach is adopted to update the user preference profile by seeking users with similar interests based on the context obtainable for a mobile network instead of from desktop networks. The trust degree between mobile users is calculated by analyzing their behavior based on the context, and then the approximate neighbors are chosen by combining the similarity of the mobile user preference and the trust degree. The approach first considers the communication behaviors between mobile users, the mobile network services they use as well as the corresponding context information. Then a similarity degree of the preference between users is calculated with the evaluation score of a certain mobile web service provided by a mobile user. Finally, based on the time attenuation function, the users with similar preference are found, through which we can dynamically update the target user’s preference profile. Experiments are then conducted to test the effect of the context on the credibility among mobile users, the effect of time decay factors and trust degree thresholds. Simulation shows that the proposed approach outperforms two other methods in terms of Recall Ratio, Precision Ratio and Mean Absolute Error, because neither of them consider the context mobile information.

  7. Adaptive navigation and motion planning for autonomous mobile robots

    Aboshosha, Ashraf

    2004-01-01

    Exploring autonomy in robotics is a meaningful task. The intuitive definition of autonomy is the capability of a robot to make a decision based on its own knowledge, acquired by its distributed sensors, without any human interference. Throughout this framework we discuss some algorithms and techniques underlying the subjects of adaptive navigation and motion planning for autonomous mobile robots. Mobile Robots will play an important role in many future applications, such as ...

  8. Comparing the capabilities and performance of the ultra high frequency follow-on system with the mobile user objective system

    Matassa, Christopher K.

    2011-01-01

    Approved for public release; distribution is unlimited. The Mobile User Objective System (MUOS) is the DoD's next generation military Ultra High Frequency (UHF) Satellite Communication (SATCOM) system being designed to augment and eventually replace the currently oversubscribed UHF Follow-On (UFO) System. MUOS adapts a commercial third generation (3G) Wideband Code Division Multiple Access (WCDMA) cellular phone network architecture and combines it with geosynchronous satellites (in place ...

  9. Freegaming: Mobile, Collaborative, Adaptive and Augmented Exergaming

    Levent Görgü

    2012-01-01

    Full Text Available Addressing the obesity epidemic that plagues many societies remains an outstanding public health issue. One innovative approach to addressing this problem is Exergaming. A combination of Exercise and Gaming, the objective is to motivate people participate in exercise regimes, usually in their home environment. In this article a more holistic interpretation of this exercise paradigm is proposed. Freegaming augments Exergaming in a number of key dimensions but especially through the promotion of games in outdoor mobile contexts and within a social environment. The design and implementation of a platform for Freegaming is described and illustrated through the description of a sample game.

  10. Revised and Extended Mobile Commerce Technology Adaption Model

    Mohammad Othman Nassar

    2014-04-01

    Full Text Available This research is designed to cover literature gaps in the intention to adopt mobile commerce in Jordan as development country. In one hand we explored and identified the non-technological factors that affect the intention to adopt mobile commerce. In the other hand we introduced a revised and extended mobile commerce technology adaption model based on the available literature and based on the Technology Acceptance Model (TAM. Our result shows that our proposed model is valid. Our model validity was confirmed using Loading Factor and Kaiser-Mayer-Olkin (KMO. The result of this research shows that Perceived Usefulness (PU, Perceived Ease of Use (PEOU, privacy, compatibility, government policy, legal protection, risk, cost and social-culture values factors have a direct significant effect in the intention to adopt mobile commerce. This research also finds that those factors are different in their effect in the mobile commerce adoption decision where legal protection factor has the highest impact in mobile commerce adoption decision while perceived usefulness factor has the lowest impact in making such decision. The result also shows that there is a positive relationship between all study factors and the intention to adapt mobile commerce except for risk and cost factors.

  11. Development of a Mobile User Interface for Image-based Dietary Assessment

    Kim, Sungye; Schap, TusaRebecca; Bosch, Marc; Maciejewski, Ross; Delp, Edward J; Ebert, David S.; Boushey, Carol J.

    2010-01-01

    In this paper, we present a mobile user interface for image-based dietary assessment. The mobile user interface provides a front end to a client-server image recognition and portion estimation software. In the client-server configuration, the user interactively records a series of food images using a built-in camera on the mobile device. Images are sent from the mobile device to the server, and the calorie content of the meal is estimated. In this paper, we describe and discuss the design and...

  12. Creating a Seamless Cross-Platform Online Experience for Mobile Users

    Katherine Lynch

    2012-02-01

    Full Text Available In creating a mobile-optimized website for Drexel University Libraries, we have strived to preserve the seamless transition between platforms that our desktop users experience. We employ separate technology and coding solutions to make Drupal, WordPress, and HTML sections mobile optimized, while continuously improving the mobile user experience in terms of design, usability, and site performance. This paper details how, through extensive research, design, and development, we found the best solution for creating a steady mobile experience for our users.

  13. Mobile Banking in Russia: User Intention towards Adoption

    Veronika Belousova; Nikolay Chichkanov

    2015-01-01

    Mobile banking is one of the most dynamic developing types of distance banking services. For the recent years in Russia, the amount of individual bank accounts with the ability of the distance access through mobile devices increased more than by 20 times. Every year more and more banks start to offer mobile banking services. Despite this, the popularity of mobile banking applications is lower than the popularity of other banking services. Thus the problem of mobile ...

  14. Mobile Banking in Russia: User Intention towards Adoption

    Veronika Belousova; Nikolay Chichkanov

    2015-01-01

    Mobile banking is currently one of the most dynamic and rapid growth types of distance banking services. In recent years in Russia, the number of individual bank accounts that can be accessed remotely using mobile devices has increased by more than 20 times. With every year, an increasing number of banks offer mobile banking services. Nevertheless, the popularity of mobile banking applications is lower than the popularity of other banking services. Thus the problem of mobile banking adoption ...

  15. Weather effects on mobile social interactions: a case study of mobile phone users in Lisbon, Portugal.

    Santi Phithakkitnukoon

    Full Text Available The effect of weather on social interactions has been explored through the analysis of a large mobile phone use dataset. Time spent on phone calls, numbers of connected social ties, and tie strength were used as proxies for social interactions; while weather conditions were characterized in terms of temperature, relative humidity, air pressure, and wind speed. Our results are based on the analysis of a full calendar year of data for 22,696 mobile phone users (53.2 million call logs in Lisbon, Portugal. The results suggest that different weather parameters have correlations to the level and character of social interactions. We found that although weather did not show much influence upon people's average call duration, the likelihood of longer calls was found to increase during periods of colder weather. During periods of weather that were generally considered to be uncomfortable (i.e., very cold/warm, very low/high air pressure, and windy, people were found to be more likely to communicate with fewer social ties. Despite this tendency, we found that people are more likely to maintain their connections with those they have strong ties with much more than those of weak ties. This study sheds new light on the influence of weather conditions on social relationships and how mobile phone data can be used to investigate the influence of environmental factors on social dynamics.

  16. An Ambient Intelligence Framework for the Provision of Geographically Distributed Multimedia Content to Mobility Impaired Users

    Kehagias, Dionysios D.; Giakoumis, Dimitris; Tzovaras, Dimitrios; Bekiaris, Evangelos; Wiethoff, Marion

    This chapter presents an ambient intelligence framework whose goal is to facilitate the information needs of mobility impaired users on the move. This framework couples users with geographically distributed services and the corresponding multimedia content, enabling access to context-sensitive information based on user geographic location and the use case under consideration. It provides a multi-modal facility that is realized through a set of mobile devices and user interfaces that address the needs of ten different types of user impairments. The overall ambient intelligence framework enables users who are equipped with mobile devices to access multimedia content in order to undertake activities relevant to one or more of the following domains: transportation, tourism and leisure, personal support services, work, business, education, social relations and community building. User experience is being explored against those activities through a specific usage scenario.

  17. Performance Analysis of Adaptive DOA Estimation Algorithms For Mobile Applications

    A.M.Prasanna kumar,

    2015-07-01

    Full Text Available Spatial filtering for mobile communications has attracted a lot of attention over the last decade and is currently considered a very promising technique that will help future cellular networks achieve their amb itious goals. One way to accomplish this is via array signal processing with algorithms which estimate the Direction-Of-Arrival (DOA of the received waves from the mobile users. This paper evaluates the pe rformance of a number of DOA estimation algorithms. In all cases a linear antenna array at the base station is assumed to be operating typical cellular environment.

  18. Data for Users of Handheld Ion Mobility Spectrometers

    Chemical detection technology end-user surveys conducted by Idaho National Laboratory (INL) in 2005 and 2007 indicated that first responders believed manufacturers claims for instruments sometimes were not supported in field applications, and instruments sometimes did not meet their actual needs. Based on these findings, the Department of Homeland Security (DHS) asked INL to conduct a similar survey for handheld ion mobility spectrometers (IMS), which are used by a broad community of first responders as well as for other applications. To better access this broad community, the INL used the Center for Technology Commercialization, Inc. (CTC), Public Safety Technology Center (PSTC) to set up an online framework to gather information from users of handheld IMS units. This framework (Survey Monkey) was then used to perform an online Internet survey, augmented by e-mail prompts, to get information from first responders and personnel from various agencies about their direct experience with handheld IMS units. Overall, 478 individuals responded to the survey. Of these, 174 respondents actually owned a handheld IMS. Performance and satisfaction data from these 174 respondents are captured in this report. The survey identified the following observations: (1) The most common IMS unit used by respondents was the Advanced Portable Detector (APD 2000), followed by ChemRae, Sabre 4000, Sabre 2000, Draeger Multi IMS, Chemical Agent Monitor-2, Chemical Agent Monitor, Vapor Tracer, and Vapor Tracer 2. (2) The primary owners were HazMat teams (20%), fire services (14%), local police (12%), and sheriffs departments (9%). (3) IMS units are seldom used as part of an integrated system for detecting and identifying chemicals but instead are used independently. (4) Respondents are generally confused about the capabilities of their IMS unit. This is probably a result of lack of training. (5) Respondents who had no training or fewer than 8 hours were not satisfied with the overall operation

  19. Impact of mobile app user acquisition on managerial decisions: Evidence from empirical experiment

    Cabral, Francisco Manuel da Silva Brás Gaspar Vieira

    2015-01-01

    In this research we conducted a mixed research, using qualitative and quantitative analysis to study the relationship and impact between mobile advertisement and mobile app user acquisition and the conclusions companies can derive from it. Data was gathered from management of mobile advertisement campaigns of a portfolio of three different mobile apps. We found that a number of implications can be extracted from this intersection, namely to product development, internationalisa...

  20. Personalized Behavior Pattern Recognition and Unusual Event Detection for Mobile Users

    Junho Ahn

    2013-01-01

    Full Text Available Mobile phones have become widely used for obtaining help in emergencies, such as accidents, crimes, or health emergencies. The smartphone is an essential device that can record emergency situations, which can be used for clues or evidence, or as an alert system in such situations. In this paper, we focus on mobile-based identification of potentially unusual, or abnormal events, occurring in a mobile user's daily behavior patterns. For purposes of this research, we have classified events as “unusual” for a mobile user when an event is an infrequently occurring one from the user's normal behavior patterns–all of which are collected and recorded on a user's mobile phone. We build a general unusual event classification model to be automated on the smartphone for use by any mobile phone users. To classify both normal and unusual events, we analyzed the activity, location, and audio sensor data collected from 20 mobile phone users to identify these users' personalized normal daily behavior patterns and any unusual events occurring in their daily activity. We used binary fusion classification algorithms on the subjects' recorded experimental data and ultimately identified the most accurately performing fusion algorithm for unusual event detection.

  1. Constructing a user experience user experience-based mobile learning environment

    Shen, Ruimin

    2014-01-01

    Mobile learning, in the past defined as learning with mobile devices, now refers to any type of learning-on-the-go or learning that takes advantage of mobile technologies. This new definition shifted its focus from the mobility of technology to the mobility of the learner (O'Malley and Stanton 2002; Sharples, Arnedillo-Sanchez et al. 2009). Placing emphasis on the mobile learner’s perspective requires studying “how the mobility of learners augmented by personal and public technology can contr...

  2. Mobile Commerce Adoption: A Novel Buyer-User-Service Payer Metric

    Qi-Ying Su; Carl Adams

    2009-01-01

    Existing technology adoption models do not explicitly differentiate between the buyer and user of technology, seemingly assuming that the users and the buyers are the same. This article reports on an investigation into cell phone/mobile phone use, with samples from China and the UK, the results of which show that the assumption that technology users can be automatically classed as the purchasers, is flawed. Further, there seem to be three distinct stakeholders, the user, the initial purchaser...

  3. Augmented Reality user interface analysis in mobile devices

    Guzmán Guzmán, José Daniel

    2014-01-01

    [ENGLISH] The presence of high-end phones in the telephony market, has allowed consumers to have access to the computational power of mobile smart-phone devices. Powerful processors, combined with cameras and ease of development encourage an increasing number of Augmented Reality (AR) researchers to adopt mobile smart-phones as AR platform. The same way, Augmented Reality on mobile devices has become increasingly popular for many applications, including search and location, tourism, and shopp...

  4. Conceptual service architecture for adaptive mobile location services

    Schou, Saowanee

    This paper presents a conceptual service architecture for adaptive mobile location services designed to be used on the next generation wireless network. The developed service architecture consists of a set of concepts, principles, rules and guidelines for constructing, deploying, and operating the...... mobile location services. The service architecture identifies the components required to build the mobile location services and describes how these components are combined and how they should interact. As a means of exploring the developed conceptual service architecture, an illustrative case study of a...... new-concept tracking service is chosen to demonstrate the applicability of the architecture. Through the case study, the service request and response processes will be illustrated. New possible service functions provided by the developed service architecture will be examined and discussed in...

  5. PERFORMANCES OF ADAPTIVE MODULATION AND CODING IN SATELLITE MOBILE CHANNEL

    Yu Fangyuan; Yang Mingchuan; Guo Qing

    2011-01-01

    Given that satellite mobile channel is a time-varying channel,Adaptive Modulation and Coding (AMC) was proposed to provide robust and spectrally efficient transmission over satellite mobile channel.Three different kinds of channel environment were considered in this paper:the urban area,the rural area,and the open space.Four combinations of modulation and coding were designed to meet reliable communication on time-varying channel,and spectral efficiency and system throughput of these three kinds of channel environment were simulated.Based on the simulation results,this paper analysed the results and compared the performances of AMC with non-AMC system in these three kinds of channel environment.At last,we come to the conclusions:a system with AMC can achieve higher spectral efficiency and better system throughput; and the spectral efficiency and system throughput of AMC system will be higher on better satellite mobile channel.

  6. Tool-Supported User-Centred Prototyping of Mobile Applications

    Leichtenstern, Karin; André, Elisabeth; Rehm, Matthias

    2011-01-01

    PeDT (Pervasive Interface Development Toolkit for Mobile Phones) that provides assistance to interface developers of applications where mobile phones are used as interaction devices to a user’s everyday pervasive environment. Based on found tool features for UCP tools, a feature study is described between related...

  7. Power mobility with collision avoidance for older adults: User, caregiver, and prescriber perspectives

    Rosalie H. Wang, BSc (OT, PhD

    2013-12-01

    Full Text Available Collision avoidance technology has the capacity to facilitate safer mobility among older power mobility users with physical, sensory, and cognitive impairments, thus enabling independence for more users. Little is known about consumers’ perceptions of collision avoidance. This article draws on interviews (29 users, 5 caregivers, and 10 prescribers to examine views on design and utilization of this technology. Data analysis identified three themes: "useful situations or contexts," "technology design issues and real-life application," and "appropriateness of collision avoidance technology for a variety of users." Findings support ongoing development of collision avoidance for older adult users. The majority of participants supported the technology and felt that it might benefit current users and users with visual impairments, but might be unsuitable for people with significant cognitive impairments. Some participants voiced concerns regarding the risk for injury with power mobility use and some identified situations where collision avoidance might be beneficial (driving backward, avoiding dynamic obstacles, negotiating outdoor barriers, and learning power mobility use. Design issues include the need for context awareness, reliability, and user interface specifications. User desire to maintain driving autonomy supports development of collaboratively controlled systems. This research lays the groundwork for future development by illustrating consumer requirements for this technology.

  8. Content retrieval and mobile users: An outdoor investigation of an ambient travel guide

    Goker, A.S.; Cumming, H.; Myrhaug, H.I.

    2004-01-01

    People's information needs change as they encounter new situations. The need for an ambient information environment becomes more evident in the case of the mobile traveller where situated information access is one of the main challenges. The motivation for this work has been to provide relevant information to the right situation and user in an ambient manner. Our way to solve this is to deliver personalised and context-aware information to the mobile user. To this end we have developed a...

  9. Leveraging Mobile Interaction with Multimodal and Sensor-Driven User Interfaces

    Möller, Andreas

    2015-01-01

    The dissertation investigates the potential and benefits of multimodal and sensor-driven (MUSED) interaction with the goal of leveraging the user experience with mobile devices in the context of Ubiquitous Computing. It presents an in-depth analysis of MUSED user interfaces for diverse application areas, based on exemplary implementations. Moreover, methods, tools, and best practices covering the entire development process of mobile multimodal systems are provided, from design over implementa...

  10. Mobile Context-Aware Support for Public Transportation Users

    von Buchwald, Esben; Larsen, Jakob Eg; Murray-Smith, Roderick

    compass bearing, in addition to a distance range chosen by a physical gesture. The main application tested in this paper is a system to support public transport users in Copenhagen. Users can point at any bus-stop or train station and be given timetables, next departure times, and buy a ticket via SMS...

  11. An adaptable navigation strategy for Virtual Microscopy from mobile platforms.

    Corredor, Germán; Romero, Eduardo; Iregui, Marcela

    2015-04-01

    Real integration of Virtual Microscopy with the pathologist service workflow requires the design of adaptable strategies for any hospital service to interact with a set of Whole Slide Images. Nowadays, mobile devices have the actual potential of supporting an online pervasive network of specialists working together. However, such devices are still very limited. This article introduces a novel highly adaptable strategy for streaming and visualizing WSI from mobile devices. The presented approach effectively exploits and extends the granularity of the JPEG2000 standard and integrates it with different strategies to achieve a lossless, loosely-coupled, decoder and platform independent implementation, adaptable to any interaction model. The performance was evaluated by two expert pathologists interacting with a set of 20 virtual slides. The method efficiently uses the available device resources: the memory usage did not exceed a 7% of the device capacity while the decoding times were smaller than the 200 ms per Region of Interest, i.e., a window of 256×256 pixels. This model is easily adaptable to other medical imaging scenarios. PMID:25684128

  12. A service-oriented medical framework for fast and adaptive information delivery in mobile environment.

    Park, Eunjeong; Nam, Hyo Suk

    2009-11-01

    The need for fast treatment of patients in critical conditions motivates the use of mobile devices to provide prompt and consistent communication between hospitals and physicians. We propose a framework that supports ubiquitous access to medical systems using personalized mobile services and integrated medical systems. The proposed service-oriented medical framework provides dynamically composed services that are adapted to contextual variables such as the user's role, the network bandwidth, and resources available at mobile devices while supporting task allocation in distributed servers for massive resource-consuming services. It also manages accurate patient data by integrating local medical systems using medical information standards such as Digital Imaging and Communications in Medicine and Health Level 7. We have demonstrated the effectiveness of our framework by building a prototype of context-based adaptation of computerized tomography image retrieval for acute stroke treatments, which allows images to be viewed on mobile devices with WiMax wireless network. The proposed medical framework reduces hospital delays of patients and facilitates treatments in the absence of medical specialists. PMID:19775976

  13. User Profile-Driven Data Warehouse Summary for Adaptive OLAP Queries

    Rym Khemiri; Fadila Bentayeb

    2013-01-01

    Data warehousing is an essential element of decision support systems. It aims at enabling the user knowledge to make better and faster daily business decisions. To improve this decision support system and to give more and more relevant information to the user, the need to integrate user's profiles into the data warehouse process becomes crucial. In this paper, we propose to exploit users' preferences as a basis for adapting OLAP (On-Line Analytical Processing) queries to the user. For this, w...

  14. Location Based Recommendation for Mobile Users Using Language Model and Skyline Query

    Qiang Pu

    2012-09-01

    Full Text Available Location based personalized recommendation has been introduced for the purpose of providing a mobile user with interesting information by distinguishing his preference and location. In most cases, mobile user usually does not provide all attributes of his preference or query. In extreme case, especially when mobile user is moving, he even does not provide any preference or query. Meanwhile, the recommendation system database also does not contain all attributes that can express what the user needs. In this paper, we design an effective location based recommendation system to provide the most possible interesting places to a user when he is moving, according to his implicit preference and physical moving location without the user’s providing his preference or query explicitly. We proposed two circle concepts, physical position circle that represents spatial area around the user and virtual preference circle that is a non-spatial area related to user’s interests. Those skyline query places in physical position circle which also match mobile user’s implicit preference in virtual preference circle will be recommended. User’s implicit preference will be estimated under language modeling framework according to user’s historical visiting behaviors. Experiments show that our method is effective in recommending interesting places to mobile users. The main contribution of the paper comes from the combination of using skyline query and information retrieval to do an implicit location-based personalized recommendation without user’s providing explicit preference or query.

  15. Semi-autonomous competency assessment of powered mobility device users.

    Miro, Jaime Valls; Black, Ross; De Bruijn, Freek; Dissanayake, Dissanayake

    2011-01-01

    This paper describes a stand-alone sensor package and algorithms for aiding the assessment by an occupational therapist whether a person has the capacity to safely and effectively operate a powered mobility device such as a walking aid or a wheelchair. The sensor package employed consists of a laser range finder, an RGB camera and an inertial measurement unit that can be attached to any mobility device with minimal modifications. Algorithms for capturing the data received by the sensor package and for generating the map of the environment as well as the trajectory of the mobility device have been developed. Such information presents occupational therapists with the capability to provide a quantitative assessment of whether patients are ready to be safely deployed with mobile aids for their daily activities. Preliminary evaluation of the sensor package and associated algorithms based on experiments, conducted at the premises of the Prince of Wales Hospital in Sydney, are presented. PMID:22275568

  16. Empirical Study and Model of Users Acceptance for Mobile Commerce in China

    Hua Zheng; Ying Li; Dandan Jiang

    2012-01-01

    Merchants urgently need to investigate consumers willingness to accept mobile commerce and what factors influence their acceptance since the spring up of mobile commerce. By means of surveying Chinese consumers with questionnaire, this paper take consumer as research object to analyze their attitude toward using and influence factors about mobile commerce based on the user acceptance theory. The research result shows that consumers attitude toward using is influenced significantly by perceive...

  17. An application to estimate the cyber-risk detection skill of mobile device users (IDEA)

    Schaff, G.; Harpes, C.; Martin, R.; Junger, M.

    2013-01-01

    According to experts’ predictions, mobile devices (smartphones, tablet computers) will replace the widespread personal computer by 2017 for personal and work tasks (emergence of BYOD). In parallel, the expert community has observed an increase of cyber-attacks against mobile devices. Mobile device users are increasingly required to develop new skills to manage their equipment correctly. Towards this goal, the 21st Century Skills framework redefines the essential knowledge and skills, which pe...

  18. Joint Uplink/Downlink Optimization for Backhaul-Limited Mobile Cloud Computing with User Scheduling

    Al-Shuwaili, Ali Najdi; Simeone, Osvaldo; Bagheri, Alireza; Scutari, Gesualdo

    2016-01-01

    Mobile cloud computing enables the offloading of computationally heavy applications, such as for gaming, object recognition or video processing, from mobile users (MUs) to cloudlet or cloud servers, which are connected to wireless access points, either directly or through finite-capacity backhaul links. In this paper, the design of a mobile cloud computing system is investigated by proposing the joint optimization of computing and communication resources with the aim of minimizing the energy ...

  19. Personalized Behavior Pattern Recognition and Unusual Event Detection for Mobile Users

    Junho Ahn; Richard Han

    2013-01-01

    Mobile phones have become widely used for obtaining help in emergencies, such as accidents, crimes, or health emergencies. The smartphone is an essential device that can record emergency situations, which can be used for clues or evidence, or as an alert system in such situations. In this paper, we focus on mobile-based identification of potentially unusual, or abnormal events, occurring in a mobile user's daily behavior patterns. For purposes of this research, we have classified events as “u...

  20. Fingerprint Quality Evaluation in a Novel Embedded Authentication System for Mobile Users

    Giuseppe Vitello; Vincenzo Conti; Salvatore Vitabile; Filippo Sorbello

    2015-01-01

    The way people access resources, data and services, is radically changing using modern mobile technologies. In this scenario, biometry is a good solution for security issues even if its performance is influenced by the acquired data quality. In this paper, a novel embedded automatic fingerprint authentication system (AFAS) for mobile users is described. The goal of the proposed system is to improve the performance of a standard embedded AFAS in order to enable its employment in mobile devices...

  1. Per-user Policy Enforcement on Mobile Apps through Network Functions Virtualization

    Sapio, Amedeo; Risso, Fulvio Giovanni Ottavio; Baldi, Mario

    2014-01-01

    Due to the increasing popularity of smartphones and tablets, mobile apps are becoming the preferred portals for users to access various network services in both residential and enterprise environments. Predominantly using generic HTTP or HTTPS protocols, traffic from different mobile apps is largely indistinguishable. This loss of visibility into mobile app traffic brings new challenges to network management and traffic analysis. It has became very hard to implement network policies based on ...

  2. Towards Emotionally Adapted Games based on User Controlled Emotion Knobs

    Saari, Timo

    2005-01-01

    In this paper, we present a framework for a gaming personalization system to systematically facilitate user-selected desired emotional states during gameplay with control knobs that regulate the emotional impact of the game. Underlying the framework is a Psychological Customization system. It entails personalization of the way of presenting information (user interface, visual layouts, modalities, narrative structures and other factors) per user or user group to create desired transient psycho...

  3. INVESTIGATION THE ROLE OF MOBILE USER’S GENDER ON ACCEPTANCE OF PERMISSION BASE MOBILE MARKETING ON IRANIAN MOBILE USERS AND CONSUMER RIGHTS PROTECTION GUIDELINES

    Amir Bigdeli

    2014-05-01

    Full Text Available Recent progression on Internet, mobile phones and also the other communication tools allow companies to gain benefit from new applications such as SMS advertisement. Despite of these commercial opportunities, development of SMS advertisements are limited by some barriers such as invasion of mobile user’s consumer rights with unsolicited sms advertising. On one hand in developed countries, there are regulations for mobile user’s privacy protection, but on the other hand, these rules do not apply in Iran. According to the previous researches in this field, mobile user’s gender has a moderator role on acceptance of permission base mobile marketing. In this paper, the literature of mobile user’s consumer rights and effective factors on permission base mobile marketing such as Institutional Trust, Personal Trust, Mobile User’s Experience, Percieved Behavioral Control and Mobile User’s Gender are investigated through a trust base research model. Then, the hypothesized model is empirically tested using data collected from a standard questionary base survey in Tehran theater-e-shahr audiences. Structural Equation Modeling (SEM was used by the Lisrel 8.8 to evaluate the causal model and Confirmatory Factor Analysis (CFA was performed to examine the reliability and validity of the measurement model. It is concluded that Iranian mobile users due to the lack of appropriate regulations on mobile user’s consumer rights and also, receiving a lot of unsolicited sms advertising, have persecutor and negative experience about sms advertising. Because of the mentioned situation in Iran, on the both male and female research model, mobile marketing experience extremely affects the process of gaining mobile users’ permission. Thus, it is absolutely necessary to correct implementation of permission base mobile marketing and making positive and useful experience about the sms advertising for Iranian male and female mobile users.

  4. EXPLOITING IMAGE CONTENT IN LOCATION-BASED SHOPPING RECOMMENDER SYSTEMS FOR MOBILE USERS

    O. O. OLUGBARA; S. O. OJO; M. I. MPHAHLELE

    2010-01-01

    This paper demonstrates how image content can be used to realize a location-based shopping recommender system for intuitively supporting mobile users in decision making. Generic Fourier Descriptors (GFD) image content of an item was extracted to exploit knowledge contained in item and user profile databases for learning to rank recommendations. Analytic Hierarchy Process (AHP) was used to automatically select a query item from a user profile. Single Criterion Decision Ranking (SCDR) and Multi...

  5. User Perception of Reliability and Design of a Mobile Pension Application

    Jonsson, Annika

    2012-01-01

    The increasing acceptance of using mobile devices and applications to perform every day tasks has created a market for applications handling personal assets of a user. Applicationsmanaging transactions and personal and financial information place demands on the design and implementation. One issue to consider is how to support the user perception of reliability. A literature review, accompanied by a user study, show that important aspects to have in mind are trust, privacy, familiarity and se...

  6. Efficient Multi-User Computation Offloading for Mobile-Edge Cloud Computing

    Chen, Xu; Jiao, Lei; Li, Wenzhong; Fu, Xiaoming

    2015-01-01

    Mobile-edge cloud computing is a new paradigm to provide cloud computing capabilities at the edge of pervasive radio access networks in close proximity to mobile users. In this paper, we first study the multi-user computation offloading problem for mobile-edge cloud computing in a multi-channel wireless interference environment. We show that it is NP-hard to compute a centralized optimal solution, and hence adopt a game theoretic approach for achieving efficient computation offloading in a di...

  7. Effect of the Primary User Traffic on Cognitive Relaying with Adaptive Transmission

    Rao, Anlei

    2012-09-08

    In a cognitive-relay system, the secondary user is permitted to transmit data via a relay when the spectrum bands are detected to be free. The miss detection of spectrum sensing and the primary user traffic will affect the data transmission performance of the secondary user. In this paper, we investigate the impact of the status change of the primary user on the bit error rate (BER) of the adaptive transmission of the secondary user in a cognitive-relay system. Numerical results show that the primary user traffic can significantly degrade the BER of the secondary user transmission.

  8. A DYNAMIC APPROACH FOR RATE ADAPTATION IN MOBILE ADHOC NETWORKS

    Suganya Subramaniam

    2013-01-01

    Full Text Available A Mobile Ad hoc Network (MANET is a collection of mobile nodes with no fixed infrastructure. The absence of central authorization facility in dynamic and distributed environment affects the optimal utilization of resources like, throughput, power and bandwidth. Rate adaptation is the key technique to optimize the resource throughput. Some recently proposed rate adaptations use Request to Send/Clear to Send (RTS/CTS to suppress the collision effect by differentiating collisions from channel errors. This study presents a methodology to detect the misbehavior of nodes in MANET and proposed the new dynamic algorithm for rate adaptation which in turn can improve the throughput. The proposed approach is implemented in the distributed stipulating architecture with core and access routers. This method does not require additional probing overhead incurred by RTS/CTS exchanges and may be practically deployed without change in firmware. The collision and channel error occurrence will be detected by core router and intimated to the access router to choose alternate route and retain the current rate for transmission. The extensive simulation results demonstrate the effectiveness of proposed method by comparing with existing approaches.

  9. Resource Optimization in Mobile Communication Networks With User Profile-Based Algorithms

    R. Bajcsy,

    2012-04-01

    Full Text Available In mobile communications networks, Location Management enables the roaming of the user in the coverage area. The employment of the call and mobility patterns of the user can help minimize the signaling costs involved in Location Management, and optimize the available radio resources. In this paper, we carry out an exhaustive analysis of the location update costs involved in a user profile-based Location Management algorithm, and compare its performance with the classical strategy of static location areas. As original contributions, we introduce two new algorithms to obtain the β parameters, useful for the calculation of the Location Management signaling costs. Making use of these new algorithms, we show the convenience of the application of user profile-based strategies for Location Management in order to optimize the available radio resources, and we obtain practical guidelines for the optimum design of mobile communications networks.

  10. Beyond adaptive-critic creative learning for intelligent mobile robots

    Liao, Xiaoqun; Cao, Ming; Hall, Ernest L.

    2001-10-01

    Intelligent industrial and mobile robots may be considered proven technology in structured environments. Teach programming and supervised learning methods permit solutions to a variety of applications. However, we believe that to extend the operation of these machines to more unstructured environments requires a new learning method. Both unsupervised learning and reinforcement learning are potential candidates for these new tasks. The adaptive critic method has been shown to provide useful approximations or even optimal control policies to non-linear systems. The purpose of this paper is to explore the use of new learning methods that goes beyond the adaptive critic method for unstructured environments. The adaptive critic is a form of reinforcement learning. A critic element provides only high level grading corrections to a cognition module that controls the action module. In the proposed system the critic's grades are modeled and forecasted, so that an anticipated set of sub-grades are available to the cognition model. The forecasting grades are interpolated and are available on the time scale needed by the action model. The success of the system is highly dependent on the accuracy of the forecasted grades and adaptability of the action module. Examples from the guidance of a mobile robot are provided to illustrate the method for simple line following and for the more complex navigation and control in an unstructured environment. The theory presented that is beyond the adaptive critic may be called creative theory. Creative theory is a form of learning that models the highest level of human learning - imagination. The application of the creative theory appears to not only be to mobile robots but also to many other forms of human endeavor such as educational learning and business forecasting. Reinforcement learning such as the adaptive critic may be applied to known problems to aid in the discovery of their solutions. The significance of creative theory is that it

  11. Blind Adaptive Subcarrier Combining Technique for MC-CDMA Receiver in Mobile Rayleigh Channel

    Shakya, Indu; Stipidis, Elias

    2011-01-01

    A new subcarrier combining technique is proposed for MC -CDMA receiver in mobile Rayleigh fading channel. It exploits the structure formed by repeating spreading sequences of users on different subcarriers to simultaneously suppress multiple access interference (MAI) and provide implicit channel tracking without any knowledge of the channel amplitudes or training sequences. This is achieved by adaptively weighting each subcarrier in each symbol period by employing a simple gradient descent algorithm to meet the constant modulus (CM) criterion with judicious selection of step-size. Improved BER and user capacity performance are shown with similar complexity in order of O(N) compared with conventional maximum ratio combining and equal gain combining techniques even under high channel Doppler rates.

  12. Age Based User Interface in Mobile Operating System

    Sharma, Sumit; Singh, Paramjit; Mahajan, Aditya; 10.5121/ijcsea.2012.2215

    2012-01-01

    This paper proposes the creation of different interfaces in the mobile operating system for different age groups. The different age groups identified are kids, elderly people and all others. The motive behind creating different interfaces is to make the smartphones of today's world usable to all age groups.

  13. Power and Mobility-Aware Adaptive Dynamic Source Routing in Mobile Ad Hoc Network

    XULi; ZHENGBaoyu; YANGZhen

    2005-01-01

    MANET (Mobile ad hoc network) is characterized by a highly dynamic network topology. This makes routing discovery and maintenance challenging for routing protocol design. On the other hand, energy efficient routing may be another important design criterion for MANET since most of nodes are usually powered by battery with limited capacity. With optimization of DSR (Dynamic source routing) protocol, this paper proposes Power and mobility-aware adaptive dynamic source routing (PMADSR). The new routing protocol can be aware of the mobility and remaining battery capacity of nodes. Performance simulation results show that the proposed PMADSR protocol can dynamically balance the traffic load inside the whole network, so as to prolong the network lifetime, as well as achieve higher throughput.

  14. Perceived usefulness, perceived ease of use, and perceived enjoyment as drivers for the user acceptance of interactive mobile maps

    Hussain, Azham; Mkpojiogu, Emmanuel O. C.; Yusof, Muhammad Mat

    2016-08-01

    This study examines the user perception of usefulness, ease of use and enjoyment as drivers for the users' complex interaction with map on mobile devices. TAM model was used to evaluate users' intention to use and their acceptance of interactive mobile map using the above three beliefs as antecedents. Quantitative research (survey) methodology was employed and the analysis and findings showed that all the three explanatory variables used in this study, explain the variability in the user acceptance of interactive mobile map technology. Perceived usefulness, perceived ease of use, and perceived enjoyment each have significant positive influence on user acceptance of interactive mobile maps. This study further validates the TAM model.

  15. The assessment of electromagnetic field radiation exposure for mobile phone users

    Buckus Raimondas

    2014-01-01

    Full Text Available Background/Aim. During recent years, the widespread use of mobile phones has resulted in increased human exposure to electromagnetic field radiation and to health risks. Increased usage of mobile phones at the close proximity raises questions and doubts in safety of mobile phone users. The aim of the study was to assess an electromagnetic field radiation exposure for mobile phone users by measuring electromagnetic field strength in different settings at the distance of 1 to 30 cm from the mobile user. Methods. In this paper, the measurements of electric field strength exposure were conducted on different brand of mobile phones by the call-related factors: urban/rural area, indoor/outdoor setting and moving/stationary mode during calls. The different types of mobile phone were placed facing the field probe at 1 cm, 10 cm, 20 cm and 30 cm distance. Results. The highest electric field strength was recorded for calls made in rural area (indoors while the lowest electric field strength was recorded for calls made in urban area (outdoors. Calls made from a phone in a moving car gave a similar result like for indoor calls; however, calls made from a phone in a moving car exposed electric field strength two times more than that of calls in a standing (motionless position. Conclusion. Electromagnetic field radiation depends on mobile phone power class and factors, like urban or rural area, outdoor or indoor, moving or motionless position, and the distance of the mobile phone from the phone user. It is recommended to keep a mobile phone in the safe distance of 10, 20 or 30 cm from the body (especially head during the calls.

  16. Adaptation of Problem Mobile Phone Use Scale to Turkish

    Ali Haydar Şar

    2012-07-01

    Full Text Available The aim of the study is adaptation of the “Problem Mobile Phone Use Scale ” which was developed by Bianchi ve Phillips (2005 to Turkish. In order to adapt the scale, firstly scale items were translated to Turkish by the researcher. Then translation form was further developed by consulting ten specialists. English and Turkish forms of scale were both filled by 30 undergraduate students with two-week intervals respectively. Two forms were accepted as equal since the correlation between them was 0.78. Turkish version of the scale was implemented on 300 students for validity and reliability studies. In Turkish version of the scale alpha valid value was calculated as 0.94, and reliable value vas calculated 0.88. Therefore, it can be concluded that Turkish version of the scale was reliable and valid.

  17. Adaptation of problem mobile phone use scale to Turkish

    Ali Haydar Sar

    2012-08-01

    Full Text Available The aim of the study is adaptation of the “Problem Mobile Phone Use Scale ” which was developed by Bianchi ve Phillips (2005 to Turkish. In order to adapt the scale, firstly scale items were translated to Turkish by the researcher. Then translation form was further developed by consulting ten specialists. English and Turkish forms of scale were both filled by 30 undergraduate students with two-week intervals respectively. Two forms were accepted as equal since the correlation between them was 0.78. Turkish version of the scale was implemented on 300 students for validity and reliability studies. In Turkish version of the scale alpha valid value was calculated as 0.94, and reliable value vas calculated 0.88. Therefore, it can be concluded that Turkish version of the scale was reliable and valid.

  18. Predicting the Location and Time of Mobile Phone Users by Using Sequential Pattern Mining Techniques

    Ozer, Mert; Keles, Ilkcan; Toroslu, Hakki;

    2015-01-01

    , predicting the location of the next activity of the user when the location of the user changes, and predicting both the location and the time of the activity of the user when the user’s location changes. We have developed sequential pattern mining-based techniques for these three problems and validated the......In recent years, using cell phone log data to model human mobility patterns became an active research area. This problem is a challenging data mining problem due to huge size and non-uniformity of the log data, which introduces several granularity levels for the specification of temporal and...... spatial dimensions. This paper focuses on the prediction of the location of the next activity of the mobile phone users. There are several versions of this problem. In this work, we have concentrated on the following three problems: predicting the location and the time of the next user activity...

  19. Personal drivers and factors influencing the attitude toward mobile advertising: A Study on Mobile phone users

    Manijeh Bahrainizadeh

    2014-07-01

    Based on the results of the path analysis the relationship between the variables in the model is investigated and results suggest that indicators of social influence, innovativeness, mobile phone technology and the general attitude towards advertising have a significant positive effect on attitude toward mobile advertising, while individual knowledge has a negative impact on attitude toward mobile advertising.

  20. MOBILE CONTENT AND ADVERTISEMENT CHOICES OF TURKISH SPEAKING MOBILE MEDIA USERS

    Osman Köroğlu

    2011-01-01

    Turkish speaking mobile communication device users’ mobile content and advertisement choices researched via a questionnaire prepared in the light of reasoned action theory, technology acceptance model, diffusion of innovations theory, unified technology acceptance and usage theory, and uses and gratifications approach. Findings of research analyzed and explained descriptively and statistically. In mobile content choices, economic viability, environment, function and context are important issu...

  1. Pervasive games in modern mobile technology: A user study

    Akselsen, Are Sæterbø; Kristiansen, Kenneth

    2010-01-01

    Abstract. This master thesis presents the results from investigating usage patterns on portable devices and finding gamers attitudes towards different pervasive game elements.The main motivation of this project is to help developers create a better game experience with the use of pervasive elements and mobile technology, finding some pointers as to what players are likely to enjoy (or not). At the same time, the usage patterns will help us understand how players currently use games, which is ...

  2. Mobile Applications and Multi-User Virtual Reality Simulations

    Gordillo, Orlando Enrique

    2016-01-01

    This is my third internship with NASA and my second one at the Johnson Space Center. I work within the engineering directorate in ER7 (Software Robotics and Simulations Division) at a graphics lab called IGOAL. We are a very well-rounded lab because we have dedicated software developers and dedicated 3D artist, and when you combine the two, what you get is the ability to create many different things such as interactive simulations, 3D models, animations, and mobile applications.

  3. Mobile Tourism Consumer Profile: An approach to experienced users

    M. Vallespín-Arán; S. Molinillo; F. Muñoz-Leiva

    2015-01-01

    The aim of this paper is to analyze socio demographic and behavioral variables that affect the use of mobile commerce for travel planning. From the review of the theoretical framework and the empirical analysis, the influence of some of the variables traditionally used as segmentation variables is shown. Based on an online survey of 616 tourism consumers services who use a smartphone, we discovered that these consumers present different characteristics related to the following var...

  4. Awareness on Mobile Groupware Systems

    Kirsch-Pinheiro, Manuele; Gensel, Jerôme; Martin, Hervé

    2004-01-01

    Mobile Groupware Systems employ devices such as PDAs and cellular phones to explore the opportunities that mobile technologies grant for cooperative work. However, due to the physical constraints related to these devices, such systems must adapt the content of information to user's context. This adaptation usually takes into account user's location and device. As for the users of Groupware Systems, mobile users need to be aware of what is going on inside the group in order to better perform t...

  5. Image Content in Location-Based Shopping Recommender Systems For Mobile Users

    Tranos Zuva

    2012-08-01

    Full Text Available This paper shows how image content can be used to realize a shopping recommender system for intuitively supporting mobile users in decision making. A mobile user equipped with a camera enabled smart phone combined with Global Positioning System (GPS capabilities would benefit in using a recommender system for mobile users. This recommender system is queried by image sent by a smart phone together with the smart phone’s GPS coordinates then the system returns a recommended retail shop together with its GPS coordinates, the image similar to the query image and other items on special offer. This recommender system shows a drastic reduction if not elimination of usage of text by mobileusers using mobile devices when accessing the system. This paper presents the proposed recommender system and the simulated results of the recommender system. In summary the main contribution of this paper is to show how image retrieval, image content and camera enabled smart mobile device with GPS capabilities can be used to realize a location-based shopping recommender system for mobile users.

  6. Comparative Perspective of Human Behavior Patterns to Uncover Ownership Bias among Mobile Phone Users

    Ayumi Arai

    2016-06-01

    Full Text Available With the rapid spread of mobile devices, call detail records (CDRs from mobile phones provide more opportunities to incorporate dynamic aspects of human mobility in addressing societal issues. However, it has been increasingly observed that CDR data are not always representative of the population under study because it only includes device users alone. To understand the discrepancy between the population captured by CDRs and the general population, we profile principal populations of CDRs by analyzing routines based on time spent at key locations and compare these data with those of the general population. We employ a topic model to estimate typical routines of mobile phone users using CDRs as topics. The routines are extracted from field survey data and compared between those of the general population and mobile phone users. We found that there are two main population groups of mobile phone users in Dhaka: males engaged in an income-generating activity at a specific location other than home and females performing household tasks and spending most of their time at home. We determine that CDRs tend to omit students, who form a significant component of the Dhaka population.

  7. Subband Adaptive Array for DS-CDMA Mobile Radio

    Tran Xuan Nam

    2004-01-01

    Full Text Available We propose a novel scheme of subband adaptive array (SBAA for direct-sequence code division multiple access (DS-CDMA. The scheme exploits the spreading code and pilot signal as the reference signal to estimate the propagation channel. Moreover, instead of combining the array outputs at each output tap using a synthesis filter and then despreading them, we despread directly the array outputs at each output tap by the desired user's code to save the synthesis filter. Although its configuration is far different from that of 2D RAKEs, the proposed scheme exhibits relatively equivalent performance of 2D RAKEs while having less computation load due to utilising adaptive signal processing in subbands. Simulation programs are carried out to explore the performance of the scheme and compare its performance with that of the standard 2D RAKE.

  8. Which Users Should Be the Focus of Mobile Personal Health Records? Analysis of User Characteristics Influencing Usage of a Tethered Mobile Personal Health Record

    Lee, Guna; Park, Joong Yeol; Shin, Soo-Yong; Hwang, Jong Su; Ryu, Hyeon Jeong; Bates, David W.

    2016-01-01

    Abstract Background: This study was conducted to analyze the usage pattern of a hospital-tethered mobile personal health records (m-PHRs) application named My Chart in My Hand (MCMH) and to identify user characteristics that influence m-PHR usage. Materials and Methods: Access logs to MCMH and its menus were collected for a total of 18 months, from August 2011 to January 2013. Usage patterns between users without a patient identification number (ID) and users with a patient ID were compared. Users with a patient ID were divided into light and heavy user groups by the median number of monthly access. Multiple linear regression models were used to assess MCMH usage pattern by characteristics of MCMH user with a patient ID. Results: The total number of MCMH logins was 105,603, and the median number of accesses was 15 times. Users (n = 7,096) mostly accessed the “My Chart” menu, but “OPD [outpatient department] Service Support” and “Health Management” menus were also frequently used. Patients with chronic diseases, experience of hospital visits including emergency room and OPD, and age group of 0–19 years were more frequently found among users with a patient ID (n = 2,186) (p < 0.001). A similar trend was found in the heavy user group (n = 1,123). Submenus of laboratory result, online appointment, and medication lists that were accessed mostly by users with a patient ID were associated with OPD visit and chronic diseases. Conclusions: This study showed that focuses on patients with chronic disease and more hospital visits and empowerment functions in a tethered m-PHR would be helpful to pursue the extensive use. PMID:26447775

  9. Educational Multimedia Profiling Recommendations for Device-Aware Adaptive Mobile Learning

    Moldovan, Arghir-Nicolae; Ghergulescu, Ioana; Muntean, Cristina Hava

    2014-01-01

    Mobile learning is seeing a fast adoption with the increasing availability and affordability of mobile devices such as smartphones and tablets. As the creation and consumption of educational multimedia content on mobile devices is also increasing fast, educators and mobile learning providers are faced with the challenge to adapt multimedia type…

  10. TrPF: Location Aware Participation System For Mobile Users

    Anju Augustine

    2014-10-01

    Full Text Available The ubiquity of the various cheap embedded sensors on mobile devices, such as cameras, microphones, accelerometers, and so on , is enabling the emergence of participatory sensing applications . During participatory sensing individuals can collect and analyse the participator’s location as well as trajectory privacy which break the participators privacy. In the proposed system we improve a trajectory privacy preserving framework. For that we improve a the oritical mix zone model with considering the time factor from the perspective of graph theory. It does not reveal the participators information. Here considers the dummy locations also.

  11. Mobile user forecast and power-law acceleration invariance of scale-free networks

    Guo Jin-Li; Guo Zhao-Hua; Liu Xue-Jiao

    2011-01-01

    This paper studies and predicts the number growth of China's mobile users by using the power-law regression.We find that the number growth of the mobile users follows a power law.Motivated by the data on the evolution of the mobile users,we consider scenarios of self-organization of accelerating growth networks into scale-free structures and propose a directed network model,in which the nodes grow following a power-law acceleration.The expressions for the transient and the stationary average degree distributions are obtained by using the Poisson process.This result shows that the model generates appropriate power-law connectivity distributions.Therefore,we find a power-law acceleration invariance of the scale-free networks.The numerical simulations of the models agree with the analytical results well.

  12. Supporting User Generated Content for Mobile News Services: A Case Study

    Christos K. Georgiadis

    2012-07-01

    Full Text Available Web 2.0 applications encourage users to contribute to the production of richer content. In this context, our work mainly focuses on providing mobile users the ability to share content and to support user generated content production. Specifically, in our case study, features both for a mobile Web and for a mobile native application are implemented, capable of providing news services enriched with indicative social networking elements. The results of our work are largely related to the understanding of the required proper solutions, based on the investigation of serious technical challenges: the XML‐RPC library for the Android platform is exploited, as well as a specific Backend Joomla! component is built (Rsstoa to handle consistently external content sources, such as feeds and multipart emails.

  13. Factors influence customer satisfaction in mobile commerce : a research on Vietnamese mobile users

    Chu, Phuong Anh

    2015-01-01

    Mobile commerce – a relative new commerce mode, has become a major topic for many researchers. Along with it, measuring customer satisfaction in m- commerce is important for a wide range of firms, for it is a key element to ensure firms’ success. This thesis seeks to elucidate mobile customer’s perceptions regarding mobile commerce in Vietnam. The thesis provides an explanation on whether these customers are satisfied with m-commerce. In addition, features and challenges of m-commerce are...

  14. Platform Independent User Interface Development for Mobile Systems

    2004-01-01

    An important trend today is the demand for increased flexibility of where and how work is done. The physical work environments become more diverse and the border between work and leisure decrease. This demands flexibility of how, where, in which situations, and from what types of devices applications and services can be accessed. It is assumed that there will be a need for richer and more dynamic user interfaces on new information processing devices than are possible with HTML/XML. As a conse...

  15. User-independent accelerometer-based gesture recognition for mobile devices

    Eduardo METOLA

    2013-07-01

    Full Text Available Many mobile devices embed nowadays inertial sensors. This enables new forms of human-computer interaction through the use of gestures (movements performed with the mobile device as a way of communication. This paper presents an accelerometer-based gesture recognition system for mobile devices which is able to recognize a collection of 10 different hand gestures. The system was conceived to be light and to operate in a user-independent manner in real time. The recognition system was implemented in a smart phone and evaluated through a collection of user tests, which showed a recognition accuracy similar to other state-of-the art techniques and a lower computational complexity. The system was also used to build a human-robot interface that enables controlling a wheeled robot with the gestures made with the mobile phone

  16. The risk of subjective symptoms in mobile phone users in Poland – An epidemiological study

    Agata Szyjkowska

    2014-04-01

    Full Text Available Objectives: To assess the type and incidence of subjective symptoms related to the use of mobile phones in Polish users. Material and Methods: The study was conducted in 2005 using a questionnaire survey. Although it has been quite a long time, up to now, no such data have been published for Poland. The questionnaire consisted of 53 questions concerning sex, age, education, general health, characteristics of a mobile phone (hand-held, loud-speaking unit as well as the habits associated with its use (frequency and duration of calls, text messages, etc. and complaints associated with using a mobile phone. Results: As many as 1800 questionnaires were sent. The response was obtained from 587 subjects aged 32.6±11.3 (48.9% women, 51.1% men; the age did not differ significantly between men and women. The subjects owned a cell phone for an average of 3 years. Majority of the respondents used the phone intensively, i.e. daily (74% or almost daily (20%. Headaches were reported significantly more often by the people who talked frequently and long in comparison with other users (63.2% of the subjects, p = 0.0029, just like the symptoms of fatigue (45%, p = 0.013. Also, the feeling of warmth around the ear and directly to the auricle was reported significantly more frequently by the intensive mobile phone users, compared with other mobile phone users (47.3%, p = 0.00004 vs. 44.6%, p = 0.00063, respectively. Most symptoms appeared during or immediately after a call and disappeared within 2 h after the call. Continuous headache, persisting for longer than 6 h since the end of a call, was reported by 26% of the subjects. Conclusions: Our results show that the mobile phone users may experience subjective symptoms, the intensity of which depends on the intensity of use of mobile phones.

  17. MOBILE CONTENT AND ADVERTISEMENT CHOICES OF TURKISH SPEAKING MOBILE MEDIA USERS

    Osman Köroğlu

    2011-06-01

    Full Text Available Turkish speaking mobile communication device users’ mobile content and advertisement choices researched via a questionnaire prepared in the light of reasoned action theory, technology acceptance model, diffusion of innovations theory, unified technology acceptance and usage theory, and uses and gratifications approach. Findings of research analyzed and explained descriptively and statistically. In mobile content choices, economic viability, environment, function and context are important issues. In mobile advertisement and marketing choices, privacy of personal information and choices, permission based advertisement and marketing contents are important issues.

  18. Adaptive network traffic management for multi user virtual environments

    Oliver, Iain Angus

    2011-01-01

    Multi User Virtual Environments (MUVE) are a new class of Internet application with a significant user base. This thesis adds to our understanding of how MUVE network traffic fits into the mix of Internet traffic, and how this relates to the application's needs. MUVEs differ from established Internet traffic types in their requirements from the network. They differ from traditional data traffic in that they have soft real-time constraints, from game traffic in that their bandwidth requi...

  19. Designing a Tourism Recommender System Based on Location, Mobile Device and User Features in Museum

    Maede Kiani Sarkaleh; Mehregan Mahdavi; Mahsa Baniardalan

    2012-01-01

    Today, mobile devices are widely used by many tourists. They can use mobile for accessing information about all sightseeing around the world. On the other hand, it seems essential to personalize the content due to diversity of learners and variation of the tools they use. On the whole, the goal for personalization is to suggest a collection of comprehensive activities, taking into consideration factors such as location, user preferences and interests and so on. One of the applications of rec...

  20. Proposition of an M-Business Procedure Model for the Development of Mobile User Interfaces

    Glissmann, Susanne; Smolnik, Stefan; Schierholz, Ragnar; Kolbe, Lutz; Brenner, Walter

    2005-01-01

    In the design of desktop applications, developers successfully deploy structured software life cycle models to simplify the development process. Applying these models in m-business often does not result in usable software. M-business applications differ from desktop applications mainly in their limited user interface as well as the new mobile and dynamic application context. Traditional software life cycle models do not consider these characteristics. Although, current mobile literature descr...

  1. Adoption of Mobile Commerce: The Impact of End User Satisfaction on System Acceptance

    Morteza Ghobakhloo; Tang S.H.; Norzima Zulkifli

    2013-01-01

    Although voluntary individual usage behavior of information system and technology is well studied in the literature, further theoretical development is needed to account for the specific characteristics of the mobile commerce. This study presents an extended technology acceptance and satisfaction model presented by Wixom and Todd (2005) that integrates technology acceptance and technology satisfaction into unified model to investigate what determines user mobile commerce acceptance and usage....

  2. STUDY ON THE DECISION PROCESS OF THE MOBILE TELECOMMUNICATIONS SERVICES’ USERS

    Georgeta-Madalina Meghisan; Flaviu Meghisan

    2014-01-01

    The current research has as starting point the decision process model and innovation adoption process, applied on the specific of mobile telecommunications users, focusing on mobile telephones/ smartphones. The decision process model has the following steps: perception of need, expectations, looking for information, alternatives evaluation, creation of preferences, choice, purchase, consumption, assessment after purchase. On the other hand, the model of innovation adoption focus on the follow...

  3. The Privacy Calculus: Mobile Apps and User Perceptions of Privacy and Security

    Elizabeth Fife; Juan Orjuela

    2012-01-01

    A continuing stream of new mobile data services are being released that rely upon the collection of personal data to support a business model. New technologies including facial recognition, sensors and Near Field Communications (NFC) will increasingly become a part of everyday services and applications that challenge traditional concepts of individual privacy. The average person as well as the “tech‐savvy” mobile phone user may not yet be fully aware of the extent to which their privacy and s...

  4. Recruiting and Retaining Mobile Young Injection Drug Users in a Longitudinal Study

    Lankenau, Stephen E.; Sanders, Bill; Hathazi, Dodi; Jackson Bloom, Jennifer

    2011-01-01

    Longitudinal studies that research homeless persons or transient drug users face particular challenges in retaining subjects. Between 2005 and 2006, 101 mobile young injection drug users were recruited in Los Angeles into a 2-year longitudinal study. Several features of ethnographic methodology, including fieldwork and qualitative interviews, and modifications to the original design, such as toll-free calls routed directly to ethnographer cell phones and wiring incentive payments, resulted in retention of 78% of subjects for the first follow-up interview. Longitudinal studies that are flexible and based upon qualitative methodologies are more likely to retain mobile subjects while also uncovering emergent research findings. PMID:20222779

  5. Minimizing the impact of the handover for mobile users in WLAN: a study on performance optimization

    Zola, Enrica Valeria; Kassler, Andreas

    2016-01-01

    IEEE 802.11 based Wireless LANs are an important piece in today’s communication infrastructure in order to provide high speed wireless Internet access to static or quasi mobile users. For large WLAN deployments (i.e., Campus or enterprise WLAN), it is important to understand the impact of user mobility and handovers on the system performance. In this article, we have developed a performance model for a set of networked 802.11 based WLAN Access Points, which is based on a Mixed Integer Linear ...

  6. Lightweight Adaptation of Classifiers to Users and Contexts: Trends of the Emerging Domain

    Elena Vildjiounaite

    2015-01-01

    Full Text Available Intelligent computer applications need to adapt their behaviour to contexts and users, but conventional classifier adaptation methods require long data collection and/or training times. Therefore classifier adaptation is often performed as follows: at design time application developers define typical usage contexts and provide reasoning models for each of these contexts, and then at runtime an appropriate model is selected from available ones. Typically, definition of usage contexts and reasoning models heavily relies on domain knowledge. However, in practice many applications are used in so diverse situations that no developer can predict them all and collect for each situation adequate training and test databases. Such applications have to adapt to a new user or unknown context at runtime just from interaction with the user, preferably in fairly lightweight ways, that is, requiring limited user effort to collect training data and limited time of performing the adaptation. This paper analyses adaptation trends in several emerging domains and outlines promising ideas, proposed for making multimodal classifiers user-specific and context-specific without significant user efforts, detailed domain knowledge, and/or complete retraining of the classifiers. Based on this analysis, this paper identifies important application characteristics and presents guidelines to consider these characteristics in adaptation design.

  7. Lightweight Adaptation of Classifiers to Users and Contexts: Trends of the Emerging Domain

    Vildjiounaite, Elena; Gimel'farb, Georgy; Kyllönen, Vesa; Peltola, Johannes

    2015-01-01

    Intelligent computer applications need to adapt their behaviour to contexts and users, but conventional classifier adaptation methods require long data collection and/or training times. Therefore classifier adaptation is often performed as follows: at design time application developers define typical usage contexts and provide reasoning models for each of these contexts, and then at runtime an appropriate model is selected from available ones. Typically, definition of usage contexts and reasoning models heavily relies on domain knowledge. However, in practice many applications are used in so diverse situations that no developer can predict them all and collect for each situation adequate training and test databases. Such applications have to adapt to a new user or unknown context at runtime just from interaction with the user, preferably in fairly lightweight ways, that is, requiring limited user effort to collect training data and limited time of performing the adaptation. This paper analyses adaptation trends in several emerging domains and outlines promising ideas, proposed for making multimodal classifiers user-specific and context-specific without significant user efforts, detailed domain knowledge, and/or complete retraining of the classifiers. Based on this analysis, this paper identifies important application characteristics and presents guidelines to consider these characteristics in adaptation design. PMID:26473165

  8. Sensor-based user interface concepts for continuous, around-device and gestural interaction on mobile devices

    Kratz, Sven

    2012-01-01

    A generally observable trend of the past 10 years is that the amount of sensors embedded in mobile devices such as smart phones and tablets is rising steadily. Arguably, the available sensors are mostly underutilized by existing mobile user interfaces. In this dissertation, we explore sensor-based user interface concepts for mobile devices with the goal of making better use of the available sensing capabilities on mobile devices as well as gaining insights on the types of sensor technologies ...

  9. Context Prediction of Mobile Users Based on Time-Inferred Pattern Networks: A Probabilistic Approach

    Yong-Hyuk Kim; Yourim Yoon

    2013-01-01

    We present a probabilistic method of predicting context of mobile users based on their historic context data. The presented method predicts general context based on probability theory through a novel graphical data structure, which is a kind of weighted directed multigraphs. User context data are transformed into the new graphical structure, in which each node represents a context or a combined context and each directed edge indicates a context transfer with the time weight inferred from corr...

  10. Managing the safe mobility of older road users: How to cope with their diversity?

    Haustein, Sonja; Marin-Lamellet, Claude

    2014-01-01

    attract groups who are already users and improve their (safe) use of the preferred transport mode. However, they do not seem to succeed in increasing mobility options, e.g. by encouraging car-reliant users to cycle or use public transport or by helping older women to continue to drive. We advise that...... assistance systems, a lack of programmes to increase perceived security, as well as a comprehensive scheme for older drivers who have to stop driving....

  11. Mobile Commerce User Acceptance Study in China: A Revised UTAUT Model

    MIN Qingfei; JI Shaobo; QU Gang

    2008-01-01

    User acceptance is one of the key fundamentals for development and success of mobile commerce (m-commerce). Based on the revised unified theory of acceptance and use of technology (UTAUT) model, we described a theoretical framework that incorporates the unique characteristics of m-commerce to enhance our understanding of m-commerce acceptance and usage in China. The revised UTAUT includes the characteristics of m-commerce, inclusion and consideration of information system user satisfaction theory, and Chinese culture and context.

  12. Understanding touch screen mobile phone users by Taxonomy of Experience (ToE)

    Wang, W-C; Young, M; S. Love; Coxon, I; Human Centred Design Institute (HCDI) Research Seminar Series

    2011-01-01

    This seminar was delivered on 25th January 2011 by Wen-Chia Wang, a PhD researcher in the School of Engineering and Design at Brunel University. During her PhD, Wen-Chia worked on several projects with the telecommunication company 3 in the UK to understand user experience with mobile phones. Her PhD research addresses the importance of understanding users before conducting design; especially how individual differences of cognitive styles (holistic - serialistic) affect human operational beha...

  13. Adaptive Data Gathering in Mobile Sensor Networks Using Speedy Mobile Elements

    Yongxuan Lai

    2015-09-01

    Full Text Available Data gathering is a key operator for applications in wireless sensor networks; yet it is also a challenging problem in mobile sensor networks when considering that all nodes are mobile and the communications among them are opportunistic. This paper proposes an efficient data gathering scheme called ADG that adopts speedy mobile elements as the mobile data collector and takes advantage of the movement patterns of the network. ADG first extracts the network meta-data at initial epochs, and calculates a set of proxy nodes based on the meta-data. Data gathering is then mapped into the Proxy node Time Slot Allocation (PTSA problem that schedules the time slots and orders, according to which the data collector could gather the maximal amount of data within a limited period. Finally, the collector follows the schedule and picks up the sensed data from the proxy nodes through one hop of message transmissions. ADG learns the period when nodes are relatively stationary, so that the collector is able to pick up the data from them during the limited data gathering period. Moreover, proxy nodes and data gathering points could also be timely updated so that the collector could adapt to the change of node movements. Extensive experimental results show that the proposed scheme outperforms other data gathering schemes on the cost of message transmissions and the data gathering rate, especially under the constraint of limited data gathering period.

  14. Hidden Markov Model based Mobility Learning for Improving Indoor Tracking of Mobile Users

    Pedersen, Nikolaj Bisgaard; Laursen, Troels; Nielsen, Jimmy Jessen;

    2012-01-01

    Indoors, a user's movements are typically confined by walls, corridors, and doorways, and further he is typically repeating the same movements such as walking between certain points in the building. Conventional indoor localization systems do usually not take these properties of the user's moveme...

  15. BLAST: Battery Lifetime-constrained Adaptation with Selected Target in Mobile Devices

    Pietro Mercati

    2015-08-01

    Full Text Available Mobile devices today contain many power hungry subsystems and execute different applications. Standard power management is not aware of the desired battery lifetime and has no visibility into which applications are executing. However, power consumption is strongly dependent on which applications are executed. In this work, we propose a novel power characterization strategy for mobile devices called application-dependent power states (AP-states. Based on that, we formulate a management problem to improve performance under battery lifetime constraints, and we implement the management framework on a real Android device. We call our framework BLAST: Battery Lifetime-constrained Adaptation with Selected Target. The goal of such framework is to maximize performance while letting the device battery to last at least for a certain required lifetime, and only requires the user to select the desired target lifetime. The implementation does not require OS modifications and can be ported and installed to any Android device. We experimentally verify that our strategy can still meets user experience requirements with a selected target battery lifetime extension of at least 25%.

  16. Mobile Integrated Data Acquisition System (MIDAS). Version 1.0, User Guide

    Jordan, C.J.; Bee, E.J.; Smith, N. A.; Lawrie, K.I.G.; J Ford; Marchant, A.P.

    2006-01-01

    This report serves as a user guide to the Mobile Integrated Data Acquisition System (MIDAS) otherwise known as the digital field slip, which was developed within the SIGMA (System for Integrated Geospatial Mapping) programme. This document is designed to accompany a two-day training course that introduces staff to the hardware and software.

  17. Engineering of Data Acquiring Mobile Software and Sustainable End-User Applications

    Smith, Benton T.

    2013-01-01

    The criteria for which data acquiring software and its supporting infrastructure should be designed should take the following two points into account: the reusability and organization of stored online and remote data and content, and an assessment on whether abandoning a platform optimized design in favor for a multi-platform solution significantly reduces the performance of an end-user application. Furthermore, in-house applications that control or process instrument acquired data for end-users should be designed with a communication and control interface such that the application's modules can be reused as plug-in modular components in greater software systems. The application of the above mentioned is applied using two loosely related projects: a mobile application, and a website containing live and simulated data. For the intelligent devices mobile application AIDM, the end-user interface have a platform and data type optimized design, while the database and back-end applications store this information in an organized manner and manage access to that data to only to authorized user end application(s). Finally, the content for the website was derived from a database such that the content can be included and uniform to all applications accessing the content. With these projects being ongoing, I have concluded from my research that the applicable methods presented are feasible for both projects, and that a multi-platform design for the mobile application only marginally drop the performance of the mobile application.

  18. Mobile Money in developing markets : What should Mobile Money providers consider when trying to drive activity from the already registered user base?

    Fallah, Milad; Luo, Johanna

    2014-01-01

    For the past decade, there has been many innovations made to the mobile phone and new features such as payments have been added to the mobile phone’s capabilities. East Africa is the region with the fastest uptake and highest adoption rates of mobile money in the world. Despite the success, the amount of active users of mobile money is still low in comparison to the number of registered users. The purpose of this master thesis is to analyze what mobile money providers should consider when try...

  19. Developing a Mobile Adaptive Test (MAT) in an M-Learning Environment for Android Based 3G Mobile Devices

    Shanmugapriya M; Dr.Tamilarasi A

    2012-01-01

    M-Learning (e-Learning through mobile device) is gaining its importance worldwide among the Learning Community owing to the ubiquitous and powerful computing nature of the Mobile Devices.In an M-Learning environment, Student Assessment and Evaluation of their knowledge acquisition is a vital factor. Adaptive Testing helps the instructor to obtain an accurate estimation of the student’s levelof knowledge and learning ability. The significant advantage of Adaptive Tests is that each student rec...

  20. Predicting the Location and Time of Mobile Phone Users by Using Sequential Pattern Mining Techniques

    Ozer, Mert; Keles, Ilkcan; Toroslu, Hakki; Karagoz, Pinar; Davulcu, Hasan

    2015-01-01

    In recent years, using cell phone log data to model human mobility patterns became an active research area. This problem is a challenging data mining problem due to huge size and non-uniformity of the log data, which introduces several granularity levels for the specification of temporal and...... spatial dimensions. This paper focuses on the prediction of the location of the next activity of the mobile phone users. There are several versions of this problem. In this work, we have concentrated on the following three problems: predicting the location and the time of the next user activity...... success of these methods with real data obtained from one of the largest mobile phone operators in Turkey. Our results are very encouraging, since we were able to obtain quite high accuracy results under small prediction sets....

  1. NORKLIMA user forum on adaptation to climatic changes

    The conference contains 7 presentations focusing on climatic changes and regional, national and international adaptations to them, research particularly simulations, and various applications and finally various consequences of climatic changes. 4 of the 7 papers have been indexed for the database (tk)

  2. Information behavior in the mobile environment:A study of undergraduate smartphone users in China

    Ziming; LIU; Xiaobing; HUANG; Yue’an; FU

    2014-01-01

    Purpose:As smartphones become ubiquitous,it is important to understand emerging information behavior as a result of wide spread use of smartphones.The purpose of this study is to investigate information behavior in the mobile environment by studying undergraduate smartphone users in China.Design/methodology/approach:This study is based on a survey of 205 undergraduate students in China.Findings:Smartphones are used predominantly for accessing news and connecting to social media,rather than for academic purposes such as accessing library resources or researching.While students use smartphones for reading e-books,much of this reading is recreational during their spare time.Research limitations:The inherent limitations of self-reported measures and the small sample size of this study mean that the results cannot be generalized across different age groups and cultures.Practical implications:When targeting users on the move,information professionals should be aware that the needs and behaviors of smartphone readers are significantly different compared to users of fixed devices,and should provide services in a mobile-friendly way.Originality/value:The younger generation is accustomed to instant information access.For libraries to relevant,they must redesign their services.It is important for libraries to leverage the strengths of mobile technology and to balance traditional services with mobile delivery.Even though many mobile users will use desktop or laptop computers to access library resources,they will benefit from the availability of mobile-friendly library services.

  3. Exploring the influence of reference situations and reference pricing on mobile service user behaviour

    Blechar, Jennifer; Constantiou, Ioanna; Damsgaard, Jan

    2006-01-01

    Despite widespread proliferation of mobile devices providing access to a variety of advanced and data-rich services, adoption of those services remains low in most of the Western world. Thus, research related to the acceptance and use of mobile technology and services continues to develop. Tradit...... situations and reference prices. The article suggests that users cognitive referencing is an influential factor that must be considered when exploring their usage behaviour in the mobile services market.......Despite widespread proliferation of mobile devices providing access to a variety of advanced and data-rich services, adoption of those services remains low in most of the Western world. Thus, research related to the acceptance and use of mobile technology and services continues to develop....... Traditional research in this domain has been useful for exploring adoption and use related to individual technologies or novel services. However, our research efforts indicate that users often reflect on former experiences with similar technologies or services when choosing mobile services. This suggests that...

  4. Adaptive user interfaces for smart environments with the support of model-based languages

    Bongartz, Sara; Jin, Yucheng; Patern?, Fabio; Rett, Joerg; Santoro, Carmen; Spano, Lucio Davide

    2012-01-01

    This article presents a solution for supporting adaptive user interfaces in work environments. Its architecture is built upon the concept of model-based UI design extended by context aware and adaptive features. Model-based languages provide the software development process with useful support for, building design prototypes and actual implementations for devices with various interaction resources. The proposed architecture is able to adapt to selected aspects of the context during run-time b...

  5. Multi-user cognitive radio network resource allocation based on the adaptive niche immune genetic algorithm

    Zu Yun-Xiao; Zhou Jie

    2012-01-01

    Multi-user cognitive radio network resource allocation based on the adaptive niche immune genetic algorithm is proposed,and a fitness function is provided.Simulations are conducted using the adaptive niche immune genetic algorithm,the simulated annealing algorithm,the quantum genetic algorithm and the simple genetic algorithm,respectively.The results show that the adaptive niche immune genetic algorithm performs better than the other three algorithms in terms of the multi-user cognitive radio network resource allocation,and has quick convergence speed and strong global searching capability,which effectively reduces the system power consumption and bit error rate.

  6. Multi-user cognitive radio network resource allocation based on the adaptive niche immune genetic algorithm

    Multi-user cognitive radio network resource allocation based on the adaptive niche immune genetic algorithm is proposed, and a fitness function is provided. Simulations are conducted using the adaptive niche immune genetic algorithm, the simulated annealing algorithm, the quantum genetic algorithm and the simple genetic algorithm, respectively. The results show that the adaptive niche immune genetic algorithm performs better than the other three algorithms in terms of the multi-user cognitive radio network resource allocation, and has quick convergence speed and strong global searching capability, which effectively reduces the system power consumption and bit error rate. (geophysics, astronomy, and astrophysics)

  7. Adapting a Database of Text Messages to a Mobile-Based Weight Loss Program: The Case of the Middle East

    Selma Limam Mansar

    2014-01-01

    Full Text Available Obesity has become a worldwide epidemic. Qatar, a rapidly developing country in the Middle East, has seen a sharp increase in the prevalence of obesity. The increase can be attributed to several reasons, including sedentary lifestyles imposed by a harsh climate and the introduction of Western fast food. Mobile technologies have been used and studied as a technology to support individuals’ weight loss. The authors have developed a mobile application that implements three strategies drawn from proven theories of behavioral change. The application is localized to the cultural context of its proposed users. The objective of this paper is to present a method through which we adapted the messaging content of a weight loss application to the context of its users while retaining an effective degree of automation. The adaptation addressed body image, eating and physical exercise habits, and regional/cultural needs. The paper discusses how surveying potential users can be used to build a profile of a target population, find common patterns, and then develop a database of text messages. The text messages are automated and sent to the users at specific times of day, as suggested by the survey results.

  8. Empirical Study and Model of Users Acceptance for Mobile Commerce in China

    Hua Zheng

    2012-11-01

    Full Text Available Merchants urgently need to investigate consumers willingness to accept mobile commerce and what factors influence their acceptance since the spring up of mobile commerce. By means of surveying Chinese consumers with questionnaire, this paper take consumer as research object to analyze their attitude toward using and influence factors about mobile commerce based on the user acceptance theory. The research result shows that consumers attitude toward using is influenced significantly by perceived usefulness, perceived cost, perceived entertainment and its own development of mobile commerce, especially the factor of perceived usefulness. Although the trial ability of service doesnt influence attitude toward using directly, it has indirect effect on attitude toward using through perceived usefulness.

  9. Cognitive Support using BDI Agent and Adaptive User Modeling

    Hossain, Shabbir

    2012-01-01

    The need of constant support and care for the elderly people with special needs is gradually increasing. It is becoming the primary challenge for most of the western countries and research society to innovate new eective approaches and develop novel technologies to address the demographics...... challenges of an ageing population. This thesis work is one attempt towards that. The thesis focused on research the approaches to provide cognitive support for users with cognitive disabilities through ICT-based technological solutions. The recent advancement of Articial Intelligence and wireless sensor...

  10. Multimodal user interfaces to improve social integration of elderly and mobility impaired.

    Dias, Miguel Sales; Pires, Carlos Galinho; Pinto, Fernando Miguel; Teixeira, Vítor Duarte; Freitas, João

    2012-01-01

    Technologies for Human-Computer Interaction (HCI) and Communication have evolved tremendously over the past decades. However, citizens such as mobility impaired or elderly or others, still face many difficulties interacting with communication services, either due to HCI issues or intrinsic design problems with the services. In this paper we start by presenting the results of two user studies, the first one conducted with a group of mobility impaired users, comprising paraplegic and quadriplegic individuals; and the second one with elderly. The study participants carried out a set of tasks with a multimodal (speech, touch, gesture, keyboard and mouse) and multi-platform (mobile, desktop) system, offering an integrated access to communication and entertainment services, such as email, agenda, conferencing, instant messaging and social media, referred to as LHC - Living Home Center. The system was designed to take into account the requirements captured from these users, with the objective of evaluating if the adoption of multimodal interfaces for audio-visual communication and social media services, could improve the interaction with such services. Our study revealed that a multimodal prototype system, offering natural interaction modalities, especially supporting speech and touch, can in fact improve access to the presented services, contributing to the reduction of social isolation of mobility impaired, as well as elderly, and improving their digital inclusion. PMID:22942026

  11. THE STAKEHOLDERS OF A USER-CENTRED DESIGN PROCESS IN MOBILE SERVICE DEVELOPMENT

    Ari Alamaki

    2015-10-01

    Full Text Available The use of agile methods in mobile service development has gained much attention in software design research. In addition, involving the potential stakeholders of the mobile service in the design and development process has become vital in achieving the best service experience. Many application development methodologies, such as user-centred design (UCD, ensure that stakeholders have direct involvement in the design and development. This paper describes experiences of designing a mobile concept where various stakeholders, such as tourism companies, target application users, business experts and the application developers, were involved in the design and development process. The main focus of this paper is the roles and contributions of stakeholders in mobile services for outdoor activities such as kayaking, hiking and biking. These outdoor activities are associated with different functional and non-functional requirements that are essential considerations during the design and development process. Therefore, we utilized the UCD principle as an appropriate method of involving all stakeholders in the design process, and we show that hearing the stakeholders’ voice is vital in the design of outdoor-based mobile service development.

  12. Multimedia Traffic Scheduling in DVB-S2 Networks with Mobile Users

    Fairhurst, Gorry; Giambene, Giovanni; Giannetti, Samuele; Parraga Niebla, Cristina; Sali, Aduwati

    2008-01-01

    DVB-S2 is a second-generation standard for satellite transmissions, developed to improve the performance of DVBS. Recently, research efforts have been devoted to extend this standard for mobile usage. In this paper we consider a scenario composed of a Ku-band GEO bent-pipe satellite, a gateway and some mobile users. The interest is here in investigating the performance of a scheduling scheme to manage DVB-S2 resources on the forward channel for the delivery of video CBR a...

  13. Exploiting multi-agent systems in realizing adaptivity in the mobile tourist domain

    O'Hare, G. M. P.; O'Grady, Michael J; Poslad, Stefan; Titkov, Leonid

    2009-01-01

    Ongoing developments in an array of mobile computing technologies have rendered the deployment of intelligent agents feasible on lightweight computational devices such as mobile phones. This development extends the Multi-Agent System (MAS) paradigm to a new frontier, opening up significant avenues of research in intelligent mobile computing, amongst others. To demonstrate the potential of this approach, the practical realization of adaptivity in two classic agent-based mobile computing ...

  14. CP-ABE Based Privacy-Preserving User Profile Matching in Mobile Social Networks.

    Cui, Weirong; Du, Chenglie; Chen, Jinchao

    2016-01-01

    Privacy-preserving profile matching, a challenging task in mobile social networks, is getting more attention in recent years. In this paper, we propose a novel scheme that is based on ciphertext-policy attribute-based encryption to tackle this problem. In our scheme, a user can submit a preference-profile and search for users with matching-profile in decentralized mobile social networks. In this process, no participant's profile and the submitted preference-profile is exposed. Meanwhile, a secure communication channel can be established between the pair of successfully matched users. In contrast to existing related schemes which are mainly based on the secure multi-party computation, our scheme can provide verifiability (both the initiator and any unmatched user cannot cheat each other to pretend to be matched), and requires few interactions among users. We provide thorough security analysis and performance evaluation on our scheme, and show its advantages in terms of security, efficiency and usability over state-of-the-art schemes. PMID:27337001

  15. CP-ABE Based Privacy-Preserving User Profile Matching in Mobile Social Networks.

    Weirong Cui

    Full Text Available Privacy-preserving profile matching, a challenging task in mobile social networks, is getting more attention in recent years. In this paper, we propose a novel scheme that is based on ciphertext-policy attribute-based encryption to tackle this problem. In our scheme, a user can submit a preference-profile and search for users with matching-profile in decentralized mobile social networks. In this process, no participant's profile and the submitted preference-profile is exposed. Meanwhile, a secure communication channel can be established between the pair of successfully matched users. In contrast to existing related schemes which are mainly based on the secure multi-party computation, our scheme can provide verifiability (both the initiator and any unmatched user cannot cheat each other to pretend to be matched, and requires few interactions among users. We provide thorough security analysis and performance evaluation on our scheme, and show its advantages in terms of security, efficiency and usability over state-of-the-art schemes.

  16. CP-ABE Based Privacy-Preserving User Profile Matching in Mobile Social Networks

    Cui, Weirong; Du, Chenglie; Chen, Jinchao

    2016-01-01

    Privacy-preserving profile matching, a challenging task in mobile social networks, is getting more attention in recent years. In this paper, we propose a novel scheme that is based on ciphertext-policy attribute-based encryption to tackle this problem. In our scheme, a user can submit a preference-profile and search for users with matching-profile in decentralized mobile social networks. In this process, no participant’s profile and the submitted preference-profile is exposed. Meanwhile, a secure communication channel can be established between the pair of successfully matched users. In contrast to existing related schemes which are mainly based on the secure multi-party computation, our scheme can provide verifiability (both the initiator and any unmatched user cannot cheat each other to pretend to be matched), and requires few interactions among users. We provide thorough security analysis and performance evaluation on our scheme, and show its advantages in terms of security, efficiency and usability over state-of-the-art schemes. PMID:27337001

  17. Cross-standard user description in mobile, medical oriented virtual collaborative environments

    Ganji, Rama Rao; Mitrea, Mihai; Joveski, Bojan; Chammem, Afef

    2015-03-01

    By combining four different open standards belonging to the ISO/IEC JTC1/SC29 WG11 (a.k.a. MPEG) and W3C, this paper advances an architecture for mobile, medical oriented virtual collaborative environments. The various users are represented according to MPEG-UD (MPEG User Description) while the security issues are dealt with by deploying the WebID principles. On the server side, irrespective of their elementary types (text, image, video, 3D, …), the medical data are aggregated into hierarchical, interactive multimedia scenes which are alternatively represented into MPEG-4 BiFS or HTML5 standards. This way, each type of content can be optimally encoded according to its particular constraints (semantic, medical practice, network conditions, etc.). The mobile device should ensure only the displaying of the content (inside an MPEG player or an HTML5 browser) and the capturing of the user interaction. The overall architecture is implemented and tested under the framework of the MEDUSA European project, in partnership with medical institutions. The testbed considers a server emulated by a PC and heterogeneous user devices (tablets, smartphones, laptops) running under iOS, Android and Windows operating systems. The connection between the users and the server is alternatively ensured by WiFi and 3G/4G networks.

  18. SMR-Based Adaptive Mobility Management Scheme in Hierarchical SIP Networks

    KwangHee Choi; Joon-Min Gil

    2014-01-01

    In hierarchical SIP networks, paging is performed to reduce location update signaling cost for mobility management. However, the cost efficiency largely depends on each mobile node’s session-to-mobility-ratio (SMR), which is defined as a ratio of the session arrival rate to the movement rate. In this paper, we propose the adaptive mobility management scheme that can determine the policy regarding to each mobile node’s SMR. Each mobile node determines whether the paging is applied or not after...

  19. A Neural Network Approach to Intention Modeling for User-Adapted Conversational Agents.

    Griol, David; Callejas, Zoraida

    2016-01-01

    Spoken dialogue systems have been proposed to enable a more natural and intuitive interaction with the environment and human-computer interfaces. In this contribution, we present a framework based on neural networks that allows modeling of the user's intention during the dialogue and uses this prediction to dynamically adapt the dialogue model of the system taking into consideration the user's needs and preferences. We have evaluated our proposal to develop a user-adapted spoken dialogue system that facilitates tourist information and services and provide a detailed discussion of the positive influence of our proposal in the success of the interaction, the information and services provided, and the quality perceived by the users. PMID:26819592

  20. Using the Userʼs Point of View for Interaction on Mobile Devices

    Francone, Jérémie; Nigay, Laurence

    2011-01-01

    We study interaction modalities for mobile devices (smartphones and tablets) that rely on a camera-based head tracking. This technique defines new possibilities for input and output interaction. For output, by computing the position of the device according to the user's head, it is for example possible to realistically control the viewpoint on a 3D scene (Head-Coupled Perspective, HCP). This technique improves the output interaction bandwidth by enhancing the depth perception and by allowing ...

  1. User Behaviour Before Mobile Phone Disposal and Recycling in the State of São Paulo

    Guilherme Akio Koga

    2014-12-01

    Full Text Available Given the privatization of the Telebras system in 1998 and the constant development of new technologies, mobile phone consumption picked up in the form of a craze in Brazil to the extent of in 2010 mile stoning 100% density, i.e., more than 190 million units were then in use within the domestic market. On the other hand, it seems appropriate to wonder what happens to this equipment once their lifecycle ends. Sheltered by this context, the prime purpose of this study is not only to evaluate user behaviour in the State of São Paulo in as much as mobile phone disposal and recycling is concerned, but also to contribute with the improvement of the current scenario. To this effect, some aspects of existing Brazilian mobile telephony market post-consumption reverse logistics practices were diagnosed. A quantitative exploratory survey centred on São Paulo State respondents was also conducted so as to pinpoint their behaviour in terms of mobile phone recycling and assess the factors that influence their disposal and recycling. Outcomes unveiled that although 60% of respondents are aware of the fact that mobile phones are recyclable, only 7% have so done with their old phones. Finally, the study sought to contribute with suggested mobile phone market actions so as to increase post-consumption recycling. 

  2. How to Gamify Information Systems - Adapting Gamification to Individual User Preferences

    Schöbel, Sofia; Söllner, Matthias

    2016-01-01

    Gamification refers to the use of game elements in a non-entertainment-based context, and is a well- known approach to motivate users of information systems. Despite the positive effects of games in daily life, more gamification projects fail. A possible explanation for this observation is that game elements are often designed without considering the needs of different groups of users. Consequently, we aim to develop a gamification approach that allows us to adapt the gamification elements to...

  3. An Efficient SDN Load Balancing Scheme Based on Variance Analysis for Massive Mobile Users

    Hong Zhong

    2015-01-01

    Full Text Available In a traditional network, server load balancing is used to satisfy the demand for high data volumes. The technique requires large capital investment while offering poor scalability and flexibility, which difficultly supports highly dynamic workload demands from massive mobile users. To solve these problems, this paper analyses the principle of software-defined networking (SDN and presents a new probabilistic method of load balancing based on variance analysis. The method can be used to dynamically manage traffic flows for supporting massive mobile users in SDN networks. The paper proposes a solution using the OpenFlow virtual switching technology instead of the traditional hardware switching technology. A SDN controller monitors data traffic of each port by means of variance analysis and provides a probability-based selection algorithm to redirect traffic dynamically with the OpenFlow technology. Compared with the existing load balancing methods which were designed to support traditional networks, this solution has lower cost, higher reliability, and greater scalability which satisfy the needs of mobile users.

  4. Utilizing Mobile Sensing to Investigate the Effects of Urban Space on Users Behavior

    Hijazi, I. H.; El Meouche, R.; Khan, A.; Aboud, N.

    2015-10-01

    Space syntax theory was used by many researcher to determine the correlation between people behaviour and urban configuration. However, The data collected for these studies using traditional data collection methods such as questionnaire and interviews, this is associated with inaccurate and biased in data. Wireless devices and smart phones and their sensing capabilities now can be involved in solving several issue. Many mobile applications have been developed with which people are able to keep track of their daily life details. In this research mobile sensing is used to track the location and activities of users in university campuses, the collected data is correlated to space properties to interfere the open space effects on student activities in a university campus. The paper utilize Mobile GPS and accelerometer sensors to sense people behaviour in urban configuration.

  5. Designing a Tourism Recommender System Based on Location, Mobile Device and User Features in Museum

    Maede Kiani Sarkaleh

    2012-06-01

    Full Text Available Today, mobile devices are widely used by many tourists. They can use mobile for accessing information about all sightseeing around the world. On the other hand, it seems essential to personalize the content due to diversity of learners and variation of the tools they use. On the whole, the goal for personalization is to suggest a collection of comprehensive activities, taking into consideration factors such as location, user preferences and interests and so on. One of the applications of recommender systems is in tourism industry. Mobile devices can be used in sites such as museums. Demands of different people such as students, tourists and ordinary people can be met in spite of their diverse features and preferences. The purpose of this paper is to give a model which is able to recommend new locations to visitors in a museum while the visitor is given essential information about the certain features of the suggested site.

  6. The Privacy Calculus: Mobile Apps and User Perceptions of Privacy and Security

    Elizabeth Fife

    2012-07-01

    Full Text Available A continuing stream of new mobile data services are being released that rely upon the collection of personal data to support a business model. New technologies including facial recognition, sensors and Near Field Communications (NFC will increasingly become a part of everyday services and applications that challenge traditional concepts of individual privacy. The average person as well as the “tech‐savvy” mobile phone user may not yet be fully aware of the extent to which their privacy and security are being affected through their mobile activities and how comparable this situation is to personal computer usage. We investigate perceptions and usage of mobile data services that appear to have specific privacy and security sensitivities, specifically social networking,\tbanking/payments\tand\thealth‐related activities. Our annual survey of smartphone users in the U.S. and Japan is presented from 2011. This nationally representative survey data is used to show demographic and cultural differences, and substantiate our hypotheses about the links between use and privacy concerns

  7. End-User Quality of Experience Oriented Adaptive E-learning System

    Hava Muntean, Cristina; McManis, Jennifer

    2006-01-01

    In the context of new devices and with a variety of network technologies that allow access to the Internet, the providers of e-learning materials have to ensure that the users have a positive experience using their e-learning systems and they are happy to re-use them. Adaptive Hypermedia research aims to provide personalised educational material that ensures a positive learning experience for the end-users. However, user experience is dependent not only on the content served to them, but also...

  8. A new user-centered design approach: a hair washing assistive device design for users with shoulder mobility restriction.

    Wu, Fong-Gong; Ma, Min-Yuan; Chang, Ro-Han

    2009-09-01

    This study utilized a user-centered design approach as the foundation for a new Assistive Device (AD) design process. Observation and evaluation results from a Usability Context Analysis (UCA) was used to improve the analysis of Strengths, Weaknesses, Opportunities and Threats (SWOT Analysis) and the matrix of Threats, Opportunities, Weaknesses, and Strengths (TOWS matrix), resulting in two assistive device design methods named AD-SWOT and AD-TOWS. Thus, an AD-design process, tailored for designing assistive devices, was both established and tested. Owing to the information gained from using the design processes and evaluating product efficiency with various cases in the early part of the research, it was decided to use the AD-design process for the entire design process. Using this process, an adjustable hair washer for physically disabled individuals to wash their hair using normal postures was developed. Furthermore, the method derived in this study can also be applied to users suffering from single-sided shoulder-joint mobility disabilities, such as frontal flexion, scapular plan elevation, and restricted abductors. PMID:19232409

  9. A mobile phone user interface for image-based dietary assessment

    Ahmad, Ziad; Khanna, Nitin; Kerr, Deborah A.; Boushey, Carol J.; Delp, Edward J.

    2014-02-01

    Many chronic diseases, including obesity and cancer, are related to diet. Such diseases may be prevented and/or successfully treated by accurately monitoring and assessing food and beverage intakes. Existing dietary assessment methods such as the 24-hour dietary recall and the food frequency questionnaire, are burdensome and not generally accurate. In this paper, we present a user interface for a mobile telephone food record that relies on taking images, using the built-in camera, as the primary method of recording. We describe the design and implementation of this user interface while stressing the solutions we devised to meet the requirements imposed by the image analysis process, yet keeping the user interface easy to use.

  10. A Framework for the Development of Context-Adaptable User Interfaces for Ubiquitous Computing Systems

    Varela, Gervasio; Paz-Lopez, Alejandro; Becerra, Jose A.; Duro, Richard

    2016-01-01

    This paper addresses the problem of developing user interfaces for Ubiquitous Computing (UC) and Ambient Intelligence (AmI) systems. These kind of systems are expected to provide a natural user experience, considering interaction modalities adapted to the user abilities and preferences and using whatever interaction devices are present in the environment. These interaction devices are not necessarily known at design time. The task is quite complicated due to the variety of devices and technologies, and the diversity of scenarios, and it usually burdens the developer with the need to create many different UIs in order to consider the foreseeable user-environment combinations. Here, we propose an UI abstraction framework for UC and AmI systems that effectively improves the portability of those systems between different environments and for different users. It allows developers to design and implement a single UI capable of being deployed with different devices and modalities regardless the physical location. PMID:27399711

  11. AeDEn : An Adaptive Framework for Dynamic Distribution over Mobile Environments

    Le Mouël, Frédéric; André, Françoise; Segarra, Maria-Teresa

    2002-01-01

    Mobile computing is a domain in great expansion. Wireless networks (GSM, satellite, etc) and Portable Information Appliances PIAs (laptops, PDAs, cellular phones, etc) are developing very rapidly. More and more mobile users would like to execute their applications with the same quality of service as on their desktop station, whatever their needs in memory and computing power. Using such applications in a mobile environment raises new challenges. Some of these applications are extremely costly...

  12. EduMCA: an approach to Educational Mobile Content Adaptation

    Queirós, Ricardo; Pinto, Mário

    2009-01-01

    As the variety of mobile devices connected to the Internet growts there is a correponding increase in the need to deliver content tailored to their heterogeneous characteristics. At the same time, we watch to the increase of e-learning in universities through the adoption of electronic platforms and standards. Not surprisingly, the concept of mLearning (Mobile Learning) appeared in recent years decreasing the limitation of learning location with the mobility of general portable devices. Howev...

  13. A Context-Based Adaptation In Mobile Learning

    Soualah-Alila, Fayrouz; Mendes, Florence; Nicolle, Christophe

    2013-01-01

    International audience Recent developments on mobile devices and wireless technologies enable new technical capabilities for the learning domain. Nowadays, learners are able to learn anywhere and at any time. The dynamic and continually changing learning setting in learner's mobile environment gives rise to many different learning contexts. The challenge in context-aware mobile learning is to develop an approach building the best learning content according to dynamic learning situations. T...

  14. Resource allocation, health mobility and adaptation to illness

    Hauck, K.; Hollingsworth, B.; Tsuchiya, A.

    2008-01-01

    The increased availability of panel data has made it possible to estimate and measure health mobility for population subgroups who may have systematically different levels of mobility. The objective of this paper is to stimulate discussion on what estimated differences across subgroups may mean for resource allocation. We use a straightforward hypothetical example to investigate the implications of different levels of health mobility on health outcomes, considering in addition the effects of ...

  15. Mobile Education: Towards Affective Bi-modal Interaction for Adaptivity

    Efthymios Alepis

    2009-04-01

    Full Text Available One important field where mobile technology can make significant contributions is education. However one criticism in mobile education is that students receive impersonal teaching. Affective computing may give a solution to this problem. In this paper we describe an affective bi-modal educational system for mobile devices. In our research we describe a novel approach of combining information from two modalities namely the keyboard and the microphone through a multi-criteria decision making theory.

  16. User modeling and adaptation for daily routines providing assistance to people with special needs

    Martín, Estefanía; Carro, Rosa M

    2013-01-01

    User Modeling and Adaptation for Daily Routines is motivated by the need to bring attention to how people with special needs can benefit from adaptive methods and techniques in their everyday lives. Assistive technologies, adaptive systems and context-aware applications are three well-established research fields. There is, in fact, a vast amount of literature that covers HCI-related issues in each area separately. However, the contributions in the intersection of these areas have been less visible, despite the fact that such synergies may have a great impact on improving daily living.Presentin

  17. Enabling Adaptive Rate and Relay Selection for 802.11 Mobile Ad Hoc Networks

    Mehta, Neil; Wang, Wenye

    2011-01-01

    Mobile ad hoc networks (MANETs) are self-configuring wireless networks that lack permanent infrastructure and are formed among mobile nodes on demand. Rapid node mobility results in dramatic channel variation, or fading, that degrades MANET performance. Employing channel state information (CSI) at the transmitter can improve the throughput of routing and medium access control (MAC) protocols for mobile ad hoc networks. Several routing algorithms in the literature explicitly incorporate the fading signal strength into the routing metric, thus selecting the routes with strong channel conditions. While these studies show that adaptation to the time-variant channel gain is beneficial in MANETs, they do not address the effect of the outdated fading CSI at the transmitter. For realistic mobile node speeds, the channel gain is rapidly varying, and becomes quickly outdated due the feedback delay. We analyze the link throughput of joint rate adaptation and adaptive relay selection in the presence of imperfect CSI. Mor...

  18. ICCS 2009 User Guide for the International Database. Supplement 2: National Adaptations of International Questionnaires

    Brese, Falk; Jung, Michael; Mirazchiyski, Plamen; Schulz, Wolfram; Zuehlke, Olaf

    2011-01-01

    This supplement describes national adaptations made to the international version of the International Civic and Citizenship Education Study (ICCS) 2009 questionnaires. This information provides users with a guide to evaluate the availability of internationally comparable data for use in secondary analyses involving the ICCS 2009 questionnaire…

  19. Context-aware adaptive and personalized mobile learning delivery supported by UoLmP

    Sergio Gómez; Panagiotis Zervas; Sampson, Demetrios G.; Ramón Fabregat

    2014-01-01

    Over the last decade, several research initiatives have investigated the potentials of the educational paradigm shift from the traditional one-size-fits-all teaching approaches to adaptive and personalized learning. On the other hand, mobile devices are recognized as an emerging technology to facilitate teaching and learning strategies that exploit individual learners’ context. This has led to an increased interest on context-aware adaptive and personalized mobile learning systems aiming to p...

  20. Learning design implementation in context-aware and adaptive mobile learning

    Gómez Ardila, Sergio Eduardo

    2013-01-01

    Mobile learning (m-learning) is still in its infancy, and great efforts should be made so as to investigate the potentials of an educational paradigm shift from the traditional one-size-fits-all teaching approaches to an adaptive learning that can be delivered via mobile devices. Thus, the next challenge has been identified from this implication: How learning design can be implemented so as to benefit from the m-learning characteristics and achieve adaptation and personalization of the indivi...

  1. An Adaptive Game Algorithm for an Autonomous, Mobile Robot

    Hansen, Søren Tranberg; Bak, Thomas; Risager, Claus

    2012-01-01

    This paper presents a field study of a physical ball game for elderly based on an autonomous, mobile robot. The game algorithm is based on Case Based Reasoning and adjusts the game challenge to the player’s mobility skills by registering the spatio-temporal behaviour of the player using an on boa...

  2. An experiment on brand loyalty among mobile phone users in the basque region of Spain

    M.Z.Ye. Salem

    2016-03-01

    Full Text Available The aim of the article. This paper attempts to examine brand loyalty among mobile phone users – the case of the main six mobile phone companies operating in the Basque region of Spain. The results of the analysis. Marketers always try to develop a strong and healthy brand in the mind of existing as well as potential consumers. There are different views regarding the meanings and measurement of brand loyalty depending on the professional backgrounds of the individuals conducting the research. More research is necessary about brand loyalty because conceptual and empirical gaps remain in the marketing literature. Competitive studies are vital considering the differences between nations' cultures, governments and economies which affect the way companies and customers respond to markets. An empirical study was conducted to collect the primary data using a questionnaire as a tool in order to test the hypotheses. The questionnaire was distributed to 400 respondents who were randomly selected from the population. Conclusions and directions of further researches. The findings proved that there is low loyalty toward phone mobile companies according to users' attitudes through: they have moderate confidence in the services of the companies, they consider themselves moderate loyal to the companies in return for the excellent service, the companies improve its services by a moderate way, promotion of competitive companies affect their attitudes, and they will not remain committed to the companies' brands, if prices increase. In addition, there is no loyalty among mobile phone users toward companies they deal with according to users' behaviors through: the respondents intend to sign out of the companies they deal with in the next few years, they will switch to competitors if they face problems regarding the companies' services, they will intend to sign up with competitors that offer better prices, they do not encourage others to sign up for these companies

  3. Analysis of Malware Families on Android Mobiles: Detection Characteristics Recognizable by Ordinary Phone Users and How to Fix It

    Hieu Le Thanh

    2013-01-01

    The sale of products using the android Operation System (OS) phone is increasing in rate: the fact is that its price is cheaper but its configured hardware is higher, users easily buy it and the approach to this product increases the risk of the spread of mobile malware. The understanding of majority of the users of this mobile malware is still limited. While they are growing at a faster speed in the number and level of sophistication, especially their variations have crea...

  4. Adaptive Trajectory Tracking Control of Wheeled Mobile Robots with Nonholonomic Constraint

    LI Jian-hua; WANG Sun-an

    2005-01-01

    A mobile robot is one of the well-known nonholonomic systems. In this paper, a new adaptive tracking controller for the kinematic model of a nonholonomic mobile robot with unknown parameters is proposed. Stability of the rule is proved through the use of a Liapunov function. The artificial electrostatic field cooperates with error posture in steering in the controller. At last, this method is implemented on the simulations and the wheeled mobile robot. Results show the effectiveness of the controllers.

  5. An Authentication Protocol for Mobile IPTV Users Based on an RFID-USB Convergence Technique

    Jeong, Yoon-Su; Kim, Yong-Tae

    With the growing trend towards convergence in broadcast and communications media, Internet Protocol television (IPTV) that delivers real-time multimedia content over diverse types of communications networks (e.g., broadband Internet, cable TV, and satellite TV) has become a mainstream technology. Authenticating mobile IPTV subscribers who are continuously on the move is a challenge. A complex authentication process often impairs conditional access security or service quality as increasing illegal users and delaying service. This paper proposes an RFID-USB authentication protocol, for mobile IPTV users, combined with USIM-based personalized authentication and lightweight authentication that utilizes the RFID-USB technology with an implanted agent module (called an "agent tag") which temporarily enhanced user status information. The proposed authentication protocol adopts a plug-and-play security agent module that is placed in both an RFID tag and an RFID-USB. The implanted security agents cooperate in such a way that multiple RFID tags are connected seamlessly to an RFID-USB.

  6. Psycho-pedagogіcal characteristic of adaptive mobile games for deaf children of primary school age

    Іvahnenko A.A.

    2010-11-01

    Full Text Available Conducted psycho-pedagogical and medico-biological basis of usage specially adapted mobile games in the psychophysical development of deaf children of primary school age. Determine the importance of mobile gaming as a means of physical education for this children's category. As a result of research found wellness, educational, educate and correctional importance of mobile games adapted deaf schoolchildren. Adaptive mobile games are effective media for psychophysical development of deaf children that brings to improvement of cognitions.

  7. Modeling and Analyzing Adaptive User-Centric Systems in Real-Time Maude

    Wirsing, Martin; Schroeder, Andreas; 10.4204/EPTCS.36.1

    2010-01-01

    Pervasive user-centric applications are systems which are meant to sense the presence, mood, and intentions of users in order to optimize user comfort and performance. Building such applications requires not only state-of-the art techniques from artificial intelligence but also sound software engineering methods for facilitating modular design, runtime adaptation and verification of critical system requirements. In this paper we focus on high-level design and analysis, and use the algebraic rewriting language Real-Time Maude for specifying applications in a real-time setting. We propose a generic component-based approach for modeling pervasive user-centric systems and we show how to analyze and prove crucial properties of the system architecture through model checking and simulation. For proving time-dependent properties we use Metric Temporal Logic (MTL) and present analysis algorithms for model checking two subclasses of MTL formulas: time-bounded response and time-bounded safety MTL formulas. The underlyin...

  8. User evaluation of two electronic mobility aids for persons who are visually impaired: a quasi-experimental study using a standardized mobility course.

    Roentgen, Uta R; Gelderblom, Gert Jan; de Witte, Luc P

    2012-01-01

    This study was conducted to enhance insight into the functionality, usability, and efficacy of two systematically selected Electronic Mobility Aids (EMA) aimed at obstacle detection and orientation. Eight persons who are visually impaired participated in a user evaluation of the UltraCane and the Miniguide. The participants' mobility performance was observed while completing a standardized indoor mobility course with their regular mobility aid, then with each EMA, and assessed in terms of speed, Percentage Preferred Walking Speed (PPWS), type and number of mobility incidents made. Interviews were administered to ascertain users' satisfaction with the functionality, effectiveness and specific features of the assistive devices. Walking speed and PPWS declined when using an EMA compared to the long cane. The mean total number of previously defined mobility incidents decreased significantly and also the type of mobility incidents changed. Generally, participants were quite satisfied with the use of the EMA, and detailed advantageous as well as disadvantageous aspects concerning functionality and certain features of both devices. The UltraCane and the Miniguide have proven to be effective on an indoor mobility course. Individual users' characteristics and preferences appear to be critical for their appraisal of the devices. PMID:22876733

  9. Adaptable mobile applications through SATIN: exploiting logical mobilityin mobile computing middleware

    Zachariadis, S.; Mascolo, C.

    2003-01-01

    With the recent developments in wireless networks (Wavelan, Bluetooth) and the sales of mobile computers of any kind (such as laptopcomputers, Personal Digital Assistants (PDAs), mobile phones etc.) soaring, we are experiencing the availability of increasinglypowerful mobile computing environments that can roam across different types of networks. We have also recently witnessed theacceptance of Logical Mobility (LM) techniques, or the ability to ship part of an application or even a complete ...

  10. Architecting mobile enterprise app: a modeling approach to adapt enterprise applications to the mobile

    Dugerdil, Philippe

    2014-01-01

    Mobile business applications have become the trend of the day. However, studies suggest that most of the mobile business appli-cations so far are lightweight, consisting of a few thousand lines of code. Indeed, most of these mobile business apps are nothing more than specialized information query engines relying on the backend server to process the queries. However, we now see a trend toward making enterprise-size apps mobile . But if the "design while coding" approach may have worked for lim...

  11. Towards Situation Driven Mobile Tutoring System for Learning Languages and Communication Skills: Application to Users with Specific Needs

    Khemaja, Maha; Taamallah, Aroua

    2016-01-01

    Current advances in portable devices and wireless technologies had drastically impacted mobile and pervasive computing development and use. Nowadays, mobile and or pervasive applications, are increasingly being used to support users' everyday activities. These apps either distributed or standalone are characterized by the variability of the…

  12. Analysis of mobile health applications for a broad spectrum of consumers: a user experience approach.

    García-Gómez, Juan M; de la Torre-Díez, Isabel; Vicente, Javier; Robles, Montserrat; López-Coronado, Miguel; Rodrigues, Joel J

    2014-03-01

    Mobile health (m-health) apps can bring health prevention and promotion to the general population. The main purpose of this article is to analyze different m-health apps for a broad spectrum of consumers by means of three different experiences. This goal was defined following the strategic documents generated by the main prospective observatories of Information and Communications Technology for health. After a general exploration of the app markets, we analyze the entries of three specific themes focused in this article: type 2 diabetes, obesity, and breast-feeding. The user experiences reported in this study mostly cover the segments of (1) chronically monitored consumers through a Web mobile app for predicting type 2 diabetes (Diab_Alert app), (2) information seekers through a mobile app for maternity (Lactation app) and partially (3) the motivated healthy consumers through a mobile app for a dietetic monitoring and assessment (SapoFit app). These apps were developed by the authors of this work. PMID:24550566

  13. Assessment of auditory evoked potential in long-term mobile phone users.

    Sevi, E Chandra; Kumar, P Sai; Mariam, Yasmin

    2014-01-01

    Mobile phones emit strong electromagnetic wave which causes structural and functional changes in the cell membrane within the central nervous system especially auditory system. The effect of duration of mobile phone use on auditory function was examined One hundred and seventy three long-term mobile phone users aged around 17-39 yrs (both male and female) were recruited in this study. The subjects were divided into three groups according to their age Group I (17-19 yrs), Group II (20-29 yrs), Group III (30-39 yrs). After getting informed consent the subjects were instructed to fill the questionnaire for the history related to our study, conduction deafness auditory brainstem response in both the ears were assessed. Significant difference was observed among three groups in their duration of mobile phone use. Latency of Waves in three groups showed significant difference. The average latency (both right and left ear) of waves I-V was found to be prolonged in Group II when compared to Group I and Group III. Interpeak latencies I-V and I-III showed differences among three groups. The findings of present study showed abnormalities in the conduction of electrical signals in different levels of auditory pathway. PMID:26215013

  14. Impact of Primary User Traffic on Adaptive Transmission for Cognitive Radio with Partial Relay Selection

    Rao, Anlei

    2012-09-08

    In a cognitive relay system, the secondary user is permitted to transmit data via a relay when licensed frequency bands are detected to be free. Previous studies mainly focus on reducing or limiting the interference of the secondary transmission on the primary users. On the other hand, however, the primary user traffic will also affect the data transmission performance of the secondary users. In this paper, we investigate the impact of the primary user traffic on the bit error rate (BER) of the secondary transmission, when the secondary user adopts adaptive transmission with a relay partially selected. From the numerical results, we can see that the primary user traffic seriously degrades average BER. The worse-link partial selection can perform almost as well as the global selection when the channel conditions of the source-relay links and the relay-destination links differ a lot. In addition, although the relay selection improves the spectral efficiency of the secondary transmission, numerical results show that it only has slight impact on the overall average BER, so that the robustness of the system will not be affected by the relay selection.

  15. Location-Based Learning Management System for Adaptive Mobile Learning

    Frederick Ako-Nai; Qing Tan

    2013-01-01

    E-learning and distance learning are all forms of learning that take place outside of a traditional learning environment and can be alternatives for learners who are not able to study in a traditional environment for various reasons. With advancement in technologies and increased use of smart phone, mobile learning has gained popularity as another form of learning and has enabled learners to learn anywhere and anytime. Ubiquitous learning takes mobile learning to another level by providing co...

  16. Adapting Mobile Beacon-Assisted Localization in Wireless Sensor Networks

    Wei Dong; Kougen Zheng; Guodong Teng

    2009-01-01

    The ability to automatically locate sensor nodes is essential in many Wireless Sensor Network (WSN) applications. To reduce the number of beacons, many mobile-assisted approaches have been proposed. Current mobile-assisted approaches for localization require special hardware or belong to centralized localization algorithms involving some deterministic approaches due to the fact that they explicitly consider the impreciseness of location estimates. In this paper, we first propose a range-free,...

  17. Enhancing user acceptance of mandated mobile health information systems: the ePOC (electronic point-of-care project) experience.

    Burgess, Lois; Sargent, Jason

    2007-01-01

    From a clinical perspective, the use of mobile technologies, such as Personal Digital Assistants (PDAs) within hospital environments is not new. A paradigm shift however is underway towards the acceptance and utility of these systems within mobile-based healthcare environments. Introducing new technologies and associated work practices has intrinsic risks which must be addressed. This paper contends that intervening to address user concerns as they arise throughout the system development lifecycle will lead to greater levels of user acceptance, while ultimately enhancing the deliverability of a system that provides a best fit with end user needs. It is envisaged this research will lead to the development of a formalised user acceptance framework based on an agile approach to user acceptance measurement. The results of an ongoing study of user perceptions towards a mandated electronic point-of-care information system in the Northern Illawarra Ambulatory Care Team (TACT) are presented. PMID:17911883

  18. Fusion of gait and fingerprint for user authentication on mobile devices

    Derawi, Mohammad; Gafurov, Davrondzhon; Larsen, Rasmus;

    2010-01-01

    A new multi-modal biometric authentication approach using gait signals and fingerprint images as biometric traits is proposed. The individual comparison scores derived from the gait and fingers are normalized using four methods (min-max, z-score, median absolute deviation, tangent hyperbolic) and...... capacitive line sensor, an optical sensor with total internal reflection and a touch-less optical sensor. The fusion results of these two biometrics show an improved performance and a large step closer for user authentication on mobile devices....... then four fusion approaches (simple sum, user-weighting, maximum score and minimum core) are applied. Gait samples are obtained by using a dedicated accelerometer sensor attached to the hip. The proposed method is evaluated using 7200 fingerprint images and gait samples. Fingerprints are collected by a...

  19. Efficient Proximity Detection among Mobile Users via SelfTuning Policies

    Yiu, Man Lung; Hou U, Leong; Saltenis, Simonas;

    2010-01-01

    Given a set of users, their friend relationships, and a distance threshold per friend pair, the proximity detection problem is to find each pair of friends such that the Euclidean distance between them is within the given threshold. This problem plays an essential role in friend-locator applicati......Given a set of users, their friend relationships, and a distance threshold per friend pair, the proximity detection problem is to find each pair of friends such that the Euclidean distance between them is within the given threshold. This problem plays an essential role in friend...... client with a mobile region. We then design a self-tuning policy to adjust the radius of the region automatically, in order to minimize communication cost. In addition, we analyze the communication cost of our solutions, and provide valuable insights on their behaviors. Extensive experiments suggest that...

  20. Spatio-Temporal Techniques for User Identification by means of GPS Mobility Data

    Rossi, Luca; Musolesi, Mirco

    2015-01-01

    One of the greatest concerns related to the popularity of GPS-enabled devices and applications is the increasing availability of the personal location information generated by them and shared with application and service providers. Moreover, people tend to have regular routines and be characterized by a set of "significant places", thus making it possible to identify a user from his/her mobility data. In this paper we present a series of techniques for identifying individuals from their GPS movements. More specifically, we study the uniqueness of GPS information for three popular datasets, and we provide a detailed analysis of the discriminatory power of speed, direction and distance of travel. Most importantly, we present a simple yet effective technique for the identification of users from location information that are not included in the original dataset used for training, thus raising important privacy concerns for the management of location datasets.

  1. Adaptive Control for Autonomous Navigation of Mobile Robots Considering Time Delay and Uncertainty

    Armah, Stephen Kofi

    Autonomous control of mobile robots has attracted considerable attention of researchers in the areas of robotics and autonomous systems during the past decades. One of the goals in the field of mobile robotics is development of platforms that robustly operate in given, partially unknown, or unpredictable environments and offer desired services to humans. Autonomous mobile robots need to be equipped with effective, robust and/or adaptive, navigation control systems. In spite of enormous reported work on autonomous navigation control systems for mobile robots, achieving the goal above is still an open problem. Robustness and reliability of the controlled system can always be improved. The fundamental issues affecting the stability of the control systems include the undesired nonlinear effects introduced by actuator saturation, time delay in the controlled system, and uncertainty in the model. This research work develops robustly stabilizing control systems by investigating and addressing such nonlinear effects through analytical, simulations, and experiments. The control systems are designed to meet specified transient and steady-state specifications. The systems used for this research are ground (Dr Robot X80SV) and aerial (Parrot AR.Drone 2.0) mobile robots. Firstly, an effective autonomous navigation control system is developed for X80SV using logic control by combining 'go-to-goal', 'avoid-obstacle', and 'follow-wall' controllers. A MATLAB robot simulator is developed to implement this control algorithm and experiments are conducted in a typical office environment. The next stage of the research develops an autonomous position (x, y, and z) and attitude (roll, pitch, and yaw) controllers for a quadrotor, and PD-feedback control is used to achieve stabilization. The quadrotor's nonlinear dynamics and kinematics are implemented using MATLAB S-function to generate the state output. Secondly, the white-box and black-box approaches are used to obtain a linearized

  2. A channel- and QoS-adaptive turbo coded modulation architecture for mobile multimedia communication

    Zuo Jiancun; Song Wentao; Luo Hanwen; Xu Youyun

    2009-01-01

    This paper proposed a cross-layer dual adaptive coded modulation architecture using turbo codes for mobile multimedia communication, which simultaneously adapted to both the varying channel characteristics and the quality of service (QoS) of various mobile multimedia services to increase the average system throughput substantially. A pragmatic channel-adaptive turbo coded modulation scheme, which comes within 2.5dB of the Shannon limit, was optimally designed, and then a QoS-adaptive scheme was superimposed to build the dual adaptive architecture. Simulation results show that the novel dual adaption reduces the difference with the fading channel capacity to 2dB when assuming different services occur in equal probability and the service duration follows the exponential distribution.

  3. Mobile Based User-Centered Learning Environment for Adult Absolute Illiterates

    Inayat ur-Rehman

    2016-01-01

    Full Text Available Education plays a vital role in the success of any community. Countries with increased literacy rate have improved their status on the world map. In recent years, the use of e-learning methodologies has been significant. However, majority of the previous methodologies are focused on the formal education or toddlers. The technoliteracy solutions for children are not suitable for adults and those designed specifically for adults are text dominant and require the users of these applications to be functional literate. Moreover, users’ interest (sense of belonging is not taken into consideration in existing solutions. To address the aforementioned issues, a user study is conducted to collect users’ interests. Another highlight of our study is that we develop our system as a mobile device application to facilitate our target user group. Based on the collected interests, a 3D virtual learning environment is designed and developed for adult illiterate learners. To evaluate the effectiveness of the proposed environment, an experimental study is carried out with users. The results show that the proposed learning environment significantly improves adults learning.

  4. Green heterogeneous small-cell networks: Toward reducing the CO2 emissions of mobile communications industry using uplink power adaptation

    Shakir, Muhammad Zeeshan

    2013-06-01

    Heterogeneous small cell networks, or Het- SNets, are considered as a standard part of future mobile networks in which multiple lowpower low-cost user deployed base stations complement the existing macrocell infrastructure. This article proposes an energy-efficient deployment of the cells where the small cell base stations are arranged around the edge of the reference macrocell, and the deployment is referred to as cell-on-edge (COE) deployment. The proposed deployment ensures an increase in the network spectral and energy efficiency by facilitating cell edge mobile users with small cells. Moreover, COE deployment guarantees reduction of the carbon footprint of mobile operations by employing adaptive uplink power control. In order to calibrate the reduction in CO2 emissions, this article quantifies the ecological and associated economical impacts of energy savings in the proposed deployment. Simulation results quantify the improvements in CO2 emissions and spectral and energy gains of the proposed COE deployment compared to macro-only networks and typical small cell deployment strategies where small cells are randomly deployed within a given macrocell. © 2013 IEEE.

  5. LPTA: Location Predictive and Time Adaptive Data Gathering Scheme with Mobile Sink for Wireless Sensor Networks

    Chuan Zhu

    2014-01-01

    Full Text Available This paper exploits sink mobility to prolong the lifetime of sensor networks while maintaining the data transmission delay relatively low. A location predictive and time adaptive data gathering scheme is proposed. In this paper, we introduce a sink location prediction principle based on loose time synchronization and deduce the time-location formulas of the mobile sink. According to local clocks and the time-location formulas of the mobile sink, nodes in the network are able to calculate the current location of the mobile sink accurately and route data packets timely toward the mobile sink by multihop relay. Considering that data packets generating from different areas may be different greatly, an adaptive dwelling time adjustment method is also proposed to balance energy consumption among nodes in the network. Simulation results show that our data gathering scheme enables data routing with less data transmission time delay and balance energy consumption among nodes.

  6. Articulated navigation testbed (ANT): an example of adaptable intrinsic mobility

    Brosinsky, Chris A.; Hanna, Doug M.; Penzes, Steven G.

    2000-07-01

    An important but oft overlooked aspect of any robotic system is the synergistic benefit of designing the chassis to have high intrinsic mobility which complements rather than limits, its system capabilities. This novel concept continues to be investigated by the Defence Research Establishment Suffield (DRES) with the Articulated Navigation Testbed (ANT) Unmanned Ground Vehicle (UGV). The ANT demonstrates high mobility through the combination of articulated steering and a hybrid locomotion scheme which utilizes individually powered wheels on the edge of rigid legs; legs which are capable of approximately 450 degrees of rotation. The configuration can be minimally configured as a 4x4 and modularly expanded to 6x6, 8x8, and so on. This enhanced mobility configuration permits pose control and novel maneuvers such as stepping, bridging, crawling, etc. Resultant mobility improvements, particularly in unstructured and off-road environments, will reduce the resolution with which the UGV sensor systems must perceive its surroundings and decreases the computational requirements of the UGV's perception systems1 for successful semi-autonomous or autonomous terrain negotiation. This paper reviews critical vehicle developments leading up to the ANT concept, describes the basis for its configuration and speculates on the impact of the intrinsic mobility concept for UGV effectiveness.

  7. Augmented reality user interface for mobile ground robots with manipulator arms

    Vozar, Steven; Tilbury, Dawn M.

    2011-01-01

    Augmented Reality (AR) is a technology in which real-world visual data is combined with an overlay of computer graphics, enhancing the original feed. AR is an attractive tool for teleoperated UGV UIs as it can improve communication between robots and users via an intuitive spatial and visual dialogue, thereby increasing operator situational awareness. The successful operation of UGVs often relies upon both chassis navigation and manipulator arm control, and since existing literature usually focuses on one task or the other, there is a gap in mobile robot UIs that take advantage of AR for both applications. This work describes the development and analysis of an AR UI system for a UGV with an attached manipulator arm. The system supplements a video feed shown to an operator with information about geometric relationships within the robot task space to improve the operator's situational awareness. Previous studies on AR systems and preliminary analyses indicate that such an implementation of AR for a mobile robot with a manipulator arm is anticipated to improve operator performance. A full user-study can determine if this hypothesis is supported by performing an analysis of variance on common test metrics associated with UGV teleoperation.

  8. Adapted User-Centered Design: A Strategy for the Higher User Acceptance of Innovative e-Health Services

    Dejan Dinevski

    2012-08-01

    Full Text Available Being familiar with all the benefits of e-Health and the strategic plan for the Slovenian health sector’s informatization, Telekom Slovenia and the Faculty of Medicine from the University of Maribor, along with other partners, have initiated an e-Health project. The project group is developing various e-Health services that are based on modern ICT (information and communications technology solutions and will be available on several screens. In order to meet the users’ needs and expectations and, consequently, achieve the high acceptance of e-Health services, the user-centered design (UCD approach was employed in the e-Health project. However, during the research it was found that conventional UCD methods are not completely appropriate for older adults: the target population of the e-Health services. That is why the selected UCD methods were modified and adapted for older adults. The modified UCD methods used in the research study are presented in this paper. Using the results of the adapted UCD methods, a prototype for a service named MedReminder was developed. The prototype was evaluated by a group of 12 study participants. The study participants evaluated the MedReminder service as acceptable with a good potential for a high adoption rate among its target population, i.e., older adults.

  9. A novel smartphone ophthalmic imaging adapter: User feasibility studies in Hyderabad, India

    Ludwig, Cassie A.; Murthy, Somasheila I.; Pappuru, Rajeev R.; Alexandre Jais; Myung, David J; Chang, Robert T

    2016-01-01

    Aim of Study: To evaluate the ability of ancillary health staff to use a novel smartphone imaging adapter system (EyeGo, now known as Paxos Scope) to capture images of sufficient quality to exclude emergent eye findings. Secondary aims were to assess user and patient experiences during image acquisition, interuser reproducibility, and subjective image quality. Materials and Methods: The system captures images using a macro lens and an indirect ophthalmoscopy lens coupled with an iPhone 5S. We...

  10. RBUIS: simplifying enterprise application user interfaces through engineering role-based adaptive behavior

    P. Akiki; Bandara, A. K.; Yu, Y.

    2013-01-01

    Enterprise applications such as customer relationship management (CRM) and enterprise resource planning (ERP) are very large scale, encompassing millions of lines-of-code and thousands of user interfaces (UI). These applications have to be sold as feature-bloated off-the-shelf products to be used by people with diverse needs in required feature-set and layout preferences based on aspects such as skills, culture, etc. Although several approaches have been proposed for adapting UIs to various c...

  11. User experiences of mobile controlled games for activation, rehabilitation and recreation of elderly and physically impaired.

    Sirkka, Andrew; Merilampi, Sari; Koivisto, Antti; Leinonen, Markus; Leino, Mirka

    2012-01-01

    The purpose of this paper was to study how aged people experience mobile controlled game as a method of rehabilitation and recreation. The target group contained persons 70+ years of age living in assisted living conditions (N=34). The average age of the participants was 85.9 years. Women (n=17) and men (n=17) were equally presented in the sample group. Only 12 % (n=4) of participants were involved in an active weekly-based rehabilitation, light physical sitting exercises 38% (n=13). Three (n=3) of the participants (9%) used computers (net banking), and 20 (59%) used mobile phones on daily basis. Social activities and physical activation seem to be rather inadequate and traditional in assisted living organizations. The overall experiences of mobile controlled game described in this paper appeared to be a successful experiment also proving that the elderly are not as reluctant to use technical devices or playing virtual games as often thought. The game was reckoned very motivating, interesting, and entertaining both by the aged and the staff. Activation, rehabilitation and recreation in the elderly homes or assisted living organizations could benefit from utilization of new technology providing new ways and solutions that motivate the users and offer also possibilities for measuring and follow-up of the physical impacts. The future goals to improve the game were set according to the feedback given in this survey: a) wider variety of controlling modes for the game, b) developing various difficulty levels, c) developing the game to support different kinds of body movements, d) easily modified according to the individual user's exercising or rehabilitation needs as well as e) emphasizing the social aspects of the game by producing multiplayer versions. PMID:22942069

  12. Adaptation and Validation of the Sexual Assertiveness Scale (SAS) in a Sample of Male Drug Users.

    Vallejo-Medina, Pablo; Sierra, Juan Carlos

    2015-01-01

    The aim of the present study was to adapt and validate the Sexual Assertiveness Scale (SAS) in a sample of male drug users. A sample of 326 male drug users and 322 non-clinical males was selected by cluster sampling and convenience sampling, respectively. Results showed that the scale had good psychometric properties and adequate internal consistency reliability (Initiation = .66, Refusal = .74 and STD-P = .79). An evaluation of the invariance showed strong factor equivalence between both samples. A high and moderate effect of Differential Item Functioning was only found in items 1 and 14 (∆R 2 Nagelkerke = .076 and .037, respectively). We strongly recommend not using item 1 if the goal is to compare the scores of both groups, otherwise the comparison will be biased. Correlations obtained between the CSFQ-14 and the safe sex ratio and the SAS subscales were significant (CI = 95%) and indicated good concurrent validity. Scores of male drug users were similar to those of non-clinical males. Therefore, the adaptation of the SAS to drug users provides enough guarantees for reliable and valid use in both clinical practice and research, although care should be taken with item 1. PMID:25896498

  13. Hardware Platform for Mobile Adaptable Surveillance System for Critical Areas

    Megersa, Tamene Tujuba

    2012-01-01

    Smart Environment is built with the help of embedded system that can give an access to the environment in which it is placed. The embedded systems are electronic systems constituting electronic devices which are specially built to facilitate certain processes such as the human interaction with an environment. These systems play a vital role in an electronic application systems such as  medical diagnosis, geological investigation, surveillances, cash records, play stations and etc. The Mobile ...

  14. Adaptive routing for intermittently connected mobile ad hoe networks

    M. Musolesi; Hailes, S; Mascolo, C.

    2005-01-01

    The vast majority of mobile ad hoc networking research makes a very large assumption: that communication can only take place between nodes that are simultaneously accessible within in the same connected cloud (i.e., that communication is synchronous). In reality, this assumption is likely to be a poor one, particularly for sparsely or irregularly populated environments.In this paper we present the Context-Aware Routing (CAR) algorithm. CAR is a novel approach to the provision of asynchronous ...

  15. Adaptive search in mobile peer-to-peer databases

    Wolfson, Ouri (Inventor); Xu, Bo (Inventor)

    2010-01-01

    Information is stored in a plurality of mobile peers. The peers communicate in a peer to peer fashion, using a short-range wireless network. Occasionally, a peer initiates a search for information in the peer to peer network by issuing a query. Queries and pieces of information, called reports, are transmitted among peers that are within a transmission range. For each search additional peers are utilized, wherein these additional peers search and relay information on behalf of the originator of the search.

  16. Web content adaptation for mobile device: A fuzzy-based approach

    Frank C.C. Wu

    2012-03-01

    Full Text Available While HTML will continue to be used to develop Web content, how to effectively and efficiently transform HTML-based content automatically into formats suitable for mobile devices remains a challenge. In this paper, we introduce a concept of coherence set and propose an algorithm to automatically identify and detect coherence sets based on quantified similarity between adjacent presentation groups. Experimental results demonstrate that our method enhances Web content analysis and adaptation on the mobile Internet.

  17. A Framework of Auto-Adapting Distributed Object for Mobile Computing

    WANG Chen; ZHOU Ying; ZHANG Defu

    1999-01-01

    The low bandwidth hinders thedevelopment of mobile computing. Besides providing relatively higherbandwidth on communication layer, constructing adaptable upperapplication is important. In this paper, a framework of auto-adaptingdistributed object is proposed, and evaluating methods of objectperformance are given as well. Distributed objects can adjust theirbehaviors automatically in the framework and keep in relatively goodperformance to serve requests of remote applications. It is an efficientway to implement the performance transparency for mobile clients.

  18. Adaptive Tracking and Obstacle Avoidance Control for Mobile Robots With Unknown Sliding

    Mingyue Cui; Dihua Sun; Weining Liu; Min Zhao; Xiaoyong Liao

    2012-01-01

    An adaptive control approach is proposed for trajectory tracking and obstacle avoidance for mobile robots with consideration given to unknown sliding. A kinematic model of mobile robots is established in this paper, in which both longitudinal and lateral sliding are considered and processed as three time‐varying parameters. A sliding model observer is introduced to estimate the sliding parameters online. A stable tracking control law for this nonholonomic system is proposed to compensate the ...

  19. Decentralized identification and control of networks of coupled mobile platforms through adaptive synchronization of chaos

    Bezzo, Nicola; Davalos, Patricio J. Cruz; Sorrentino, Francesco; Fierro, Rafael

    2013-01-01

    In this paper we propose an application of adaptive synchronization of chaos to detect changes in the topology of a mobile robotic network. We assume that the network may evolve in time due to the relative motion of the mobile robots and due to unknown environmental conditions, such as the presence of obstacles in the environment. We consider that each robotic agent is equipped with a chaotic oscillator whose state is propagated to the other robots through wireless communication, with the goa...

  20. Factors influencing academic library users’ intention to use mobile systems: A comparison of current users and potential adopters

    Haijuan; YANG; Sisi; GUI

    2014-01-01

    Purpose: The study intends to examine the factors influencing the behavioral intention to use academic libraries’ mobile systems from the perspective of current users and potential adopters, respectively. Design/methodology/approach: Our study investigates the mobile library system’s acceptance by using a context-specific extension of the theory of reasoned action(TRA) and the technology acceptance model(TAM), which includes such factors as mobile self-efficacy, personal innovativeness and perceived playfulness. Structural equation modeling was used to test the validity of the proposed model based on the empirical data which was collected from 210 questionnaire survey participants.Findings: The result shows that 1) for both current users and potential adopters, attitude toward use and subjective norm both have a significant and positive impact on behavioral intention to use; 2) perceived usefulness and perceived ease of use are significantly correlated to potential adopters’ attitude toward use whereas perceived usefulness and perceived playfulness are significantly related to current users’ attitude toward use; 3) as for the comparison between the two groups of users, personal innovativeness not only affects perceived usefulness of both current users and potential adopters, but also affects potential adopters’ perceived playfulness positively. Mobile self-efficacy has a significant effect on perceived ease of use for both types of users.Research limitations: Although the sample size met the basic statistics requirements for the social research, the participants were mainly college students, and other mobile system users like faculty members and researchers were not investigated. In addition, some influencing factors, such as information quality, system quality and service quality were not considered in the research model.Practical implications: This study reveals main factors which influence both current users and potential adopters’ intention to use

  1. A mobile communication device adapted to provide a dynamic display arrangement

    2011-01-01

    part comprises means for correcting a skew angle in the multi-coloured image projected onto a surface. Thereby is achieved that the mobile communication device is able to provide RGB full colour dynamic image projection which is preferred over monochromatic laser projection because it is a speckle free......The invention relates to a mobile communication device comprising a light projector adapted to project a multi-coloured image onto a surface; a hinged mirror comprising a first mirror part adapted to be tilted around the hinge into the light path of the light projector; wherein the first mirror...

  2. SMR-Based Adaptive Mobility Management Scheme in Hierarchical SIP Networks

    KwangHee Choi

    2014-10-01

    Full Text Available In hierarchical SIP networks, paging is performed to reduce location update signaling cost for mobility management. However, the cost efficiency largely depends on each mobile node’s session-to-mobility-ratio (SMR, which is defined as a ratio of the session arrival rate to the movement rate. In this paper, we propose the adaptive mobility management scheme that can determine the policy regarding to each mobile node’s SMR. Each mobile node determines whether the paging is applied or not after comparing its SMR with the threshold. In other words, the paging is applied to a mobile node when a mobile node’s SMR is less than the threshold. Therefore, the proposed scheme provides a way to minimize signaling costs according to each mobile node’s SMR. We find out the optimal threshold through performance analysis, and show that the proposed scheme can reduce signaling cost than the existing SIP and paging schemes in hierarchical SIP networks.

  3. Mismatch negativity and adaptation measures of the late auditory evoked potential in cochlear implant users.

    Zhang, Fawen; Hammer, Theresa; Banks, Holly-Lolan; Benson, Chelsea; Xiang, Jing; Fu, Qian-Jie

    2011-05-01

    A better understanding of the neural correlates of large variability in cochlear implant (CI) patients' speech performance may allow us to find solutions to further improve CI benefits. The present study examined the mismatch negativity (MMN) and the adaptation of the late auditory evoked potential (LAEP) in 10 CI users. The speech syllable /da/ and 1-kHz tone burst were used to examine the LAEP adaptation. The amount of LAEP adaptation was calculated according to the averaged N1-P2 amplitude for the LAEPs evoked by the last 3 stimuli and the amplitude evoked by the first stimulus. For the MMN recordings, the standard stimulus (1-kHz tone) and the deviant stimulus (2-kHz tone) were presented in an oddball condition. Additionally, the deviants alone were presented in a control condition. The MMN was derived by subtracting the response to the deviants in the control condition from the oddball condition. Results showed that good CI performers displayed a more prominent LAEP adaptation than moderate-to-poor performers. Speech performance was significantly correlated to the amount of LAEP adaptation for the 1-kHz tone bursts. Good performers displayed large MMNs and moderate-to-poor performers had small or absent MMNs. The abnormal electrophysiological findings in moderate-to-poor performers suggest that long-term deafness may cause damage not only at the auditory cortical level, but also at the cognitive level. PMID:21129468

  4. User Affinity of Choice-Features of Mobile Device Graphical Password Scheme Anti-Shoulder Surfing Mechanism

    Lim Kah Seng; Norafida Ithnin; Hazinah Kutty Mammi

    2011-01-01

    Presently, there are various types of graphical password schemes and anti-shoulder surfing mechanisms are available. Unfortunately, the features best suited for anti-shoulder surfing mechanism on mobile devices are still an uncertainty. Furthermore, it is futile to try embedding every single available feature into a single graphical password anti-shoulder surfing mechanism for mobile devices. In this paper, a survey of user affinity was conducted to investigate the features best suited for an...

  5. Radial Nerve Mobilization Reduces Lateral Elbow Pain and Provides Short-Term Relief in Computer Users§

    Arumugam, Vanitha; Selvam, Senthil; MacDermid, Joy C

    2014-01-01

    Study Design : Prospective Experimental Study. Background : Computer users may be at risk of lateral elbow pain. It is theorized that adverse mechanical tension can arise in the radial nerve with sustained keyboarding due to sustained static work of the elbow extensor muscles. Neural mobilization has been suggested as a potential treatment. Purpose : The purpose of this study was to evaluate the effect of neural mobilization of the radial nerve on a single occasion in terms of its ability to ...

  6. Weather effects on the patterns of people's everyday activities: a study using GPS traces of mobile phone users

    Horanont, Teerayut; Phithakkitnukoon, Santi; Leong, Tuck W.; Sekimoto, Yoshihide; Shibasaki, Ryosuke

    2013-01-01

    This study explores the effects that the weather has on people's everyday activity patterns. Temperature, rainfall, and wind speed were used as weather parameters. People's daily activity patterns were inferred, such as place visited, the time this took place, the duration of the visit, based on the GPS location traces of their mobile phones overlaid upon Yellow Pages information. Our analysis of 31,855 mobile phone users allowed us to infer that people were more likely to stay longer at eate...

  7. A Flow-Level Performance Model for Mobile Networks Carrying Adaptive Streaming Traffic

    Bonald, Thomas; Elayoubi, Salah-Eddine; Lin, Yu-Ting

    2015-01-01

    International audience This paper proposes a performance model for mobile networks carrying adaptive streaming traffic. The proposed model takes into account the flow dynamics in addition to the main parameters influencing the performance of adaptive streaming, such as the playout buffer and the video bit rates. We show how to compute several performance metrics like the average video bit rate, the deficit rate, defined as the probability of having an instantaneous throughput lower than th...

  8. On channel-adaptive multiple burst admission control for mobile computing based on wideband CDMA

    Lau, VKN; Kwok, YK

    2001-01-01

    Mobile computing systems built using third generation wireless standards are mostly based on the wideband CDMA platform to support high bit rate packet data services. One important component offering packet data service in CDMA is a burst admission control algorithm. We formulate the multiple-burst admission control problem as an integer programming problem, which induces our novel jointly adaptive burst admission algorithm, called the jointly adaptive burst admission-spatial dimension algori...

  9. Mobility Prediction and Load Balancing Based Adaptive Handovers for LTE Systems

    Qi-Ping Yang; Jae-Woo Kim; Tae-Hyong Kim

    2012-01-01

    In cellular networks including Long Term Evolution (LTE) systems, how to balance the load is indispensable because traffic load and local user densities vary dynamically. A load balancing problem occurs when available wireless resources are not enough to support the requirements of users. Such a problem may lead to blocked or dropped calls and degrade the quality of service. This paper proposes amobility technique with adaptive handovers based on load balancing. In the proposed technique, a h...

  10. A novel smartphone ophthalmic imaging adapter: User feasibility studies in Hyderabad, India

    Cassie A Ludwig

    2016-01-01

    Full Text Available Aim of Study: To evaluate the ability of ancillary health staff to use a novel smartphone imaging adapter system (EyeGo, now known as Paxos Scope to capture images of sufficient quality to exclude emergent eye findings. Secondary aims were to assess user and patient experiences during image acquisition, interuser reproducibility, and subjective image quality. Materials and Methods: The system captures images using a macro lens and an indirect ophthalmoscopy lens coupled with an iPhone 5S. We conducted a prospective cohort study of 229 consecutive patients presenting to L. V. Prasad Eye Institute, Hyderabad, India. Primary outcome measure was mean photographic quality (FOTO-ED study 1–5 scale, 5 best. 210 patients and eight users completed surveys assessing comfort and ease of use. For 46 patients, two users imaged the same patient's eyes sequentially. For 182 patients, photos taken with the EyeGo system were compared to images taken by existing clinic cameras: a BX 900 slit-lamp with a Canon EOS 40D Digital Camera and an FF 450 plus Fundus Camera with VISUPAC™ Digital Imaging System. Images were graded post hoc by a reviewer blinded to diagnosis. Results: Nine users acquired 719 useable images and 253 videos of 229 patients. Mean image quality was ≥ 4.0/5.0 (able to exclude subtle findings for all users. 8/8 users and 189/210 patients surveyed were comfortable with the EyeGo device on a 5-point Likert scale. For 21 patients imaged with the anterior adapter by two users, a weighted κ of 0.597 (95% confidence interval: 0.389–0.806 indicated moderate reproducibility. High level of agreement between EyeGo and existing clinic cameras (92.6% anterior, 84.4% posterior was found. Conclusion: The novel, ophthalmic imaging system is easily learned by ancillary eye care providers, well tolerated by patients, and captures high-quality images of eye findings.

  11. Going to where the users are! Making the collaborative resource management and science workspace mobile

    Osti, D.; Osti, A.

    2013-12-01

    People are very busy today and getting stakeholders the information they need is an important part of our jobs. The BDL application is the mobile extension of the California collaborative resource management portal www.baydeltalive.com. BDL has been visited by more than 250,000 unique visitors this past year from various areas of water use and management including state and federal agencies, agriculture, scientists, policy makers, water consumers, voters, operations management and more. The audience is a qualified user group of more than 15,000 individuals participating in California hydrological ecosystem science, water management and policy. This is an important effort aimed to improve how scientists and policy makers are working together to understand this complicated and divisive system and how they are becoming better managers of that system. The BayDetaLive mobile application gives California watershed management stakeholders and water user community unprecedented access to real time natural resource management information. The application provides user with the following: 1. Access to Real Time Environmental Conditions from the more than the 600 California Data Exchange Sensors including hydrodynamic, water quality and meteorological data. Save important stations as favorites for easy access later. 2. Daily Delta Operations Data including estimated hydrology, daily exports, status of infrastructure operations, reservoir storage, salvage data, major stations, drinking water quality reports, weather forecasts and more. 3. Photos/Videos/Documents: Browse and share from the more than 1000 current documents in the BDL library. Relevant images, videos, science journals, presentations and articles. 4. Science: Access the latest science articles, news, projects and journals. 5. Data Visualizations: View recently published real time data interpolations of Delta Conditions. From 30-day turbidity models to daily forecasts. This service is published as conditions

  12. Impacts of Different Mobile User Interfaces on Students’ Satisfaction for Learning Dijkstra’s Shortest Path Algorithm

    Mazyar Seraj; Chui Yin Wong

    2014-01-01

    This paper describes an experimental study of learning Dijkstra’s shortest path algorithm on mobile devices. The aim of the study is to investigate and compare the impacts of two different mobile screen user interfaces on students’ satisfaction for learning the technical subject. A mobile learning prototype was developed for learning Dijkstra’s shortest path algorithm on Apple iPhone 4 operated on iPhone operating system (iOS), and Acer Inconia Tab operated on an Android operating system. Thi...

  13. 移动社交游戏的用户体验研究%User Experience of Mobile Social Game

    赵雅鹏; 李世国

    2012-01-01

    以随着移动互联网的快速发展,移动社交游戏广受人们的关注与欢迎为启示,从现今用户心理需求切入,分析了2012年2款最‘欠爆的移动社交游戏“DrawS{mmthing”和“CityVilleHo,nett,wn”的用户体验,对比2种类型的移动社交游戏特点,论述了移动社交游戏丰富用户游戏体验,增加社交体验模块的方法,.在此基础上,提出了从增强游戏体验感、提升用户粘合度等角度丰富移动社交游戏的用户体验的设计方法。%With the rapid development of the mobile internet, mobile social game is very popular in the attention of people and welcome as revelation, and from the present into the psychological needs of users, it analyzed the 2012 annual two of the most popular mobile social game "Draw Something" and "CityVille Hometown" user experience, compared with two kinds of types of mobile social game characteristics, discussed the mobile social game rich user gaming experience, and increased social experience module method. Based on this, it put forward from strengthen game experience feeling, to improve user bonding degree angle which could enrich mobile social game user experience design method.

  14. Impacts of Different Mobile User Interfaces on Students’ Satisfaction for Learning Dijkstra’s Shortest Path Algorithm

    Mazyar Seraj

    2014-10-01

    Full Text Available This paper describes an experimental study of learning Dijkstra’s shortest path algorithm on mobile devices. The aim of the study is to investigate and compare the impacts of two different mobile screen user interfaces on students’ satisfaction for learning the technical subject. A mobile learning prototype was developed for learning Dijkstra’s shortest path algorithm on Apple iPhone 4 operated on iPhone operating system (iOS, and Acer Inconia Tab operated on an Android operating system. Thirty students, who are either currently studying or had previously studied Computer Networks, were recruited for the usability trial. At the end of each single session, students’ satisfaction interacting with the two mobile devices was measured using QUIS questionnaire. Although there is no significant difference in students’ satisfaction between the two different mobile screen interfaces, the subjective findings indicate that Acer Inconia Tab gained higher scores as compared to Apple iPhone 4.

  15. Modeling and Simulation of An Adaptive Neuro-Fuzzy Inference System (ANFIS) for Mobile Learning

    Al-Hmouz, A.; Shen, Jun; Al-Hmouz, R.; Yan, Jun

    2012-01-01

    With recent advances in mobile learning (m-learning), it is becoming possible for learning activities to occur everywhere. The learner model presented in our earlier work was partitioned into smaller elements in the form of learner profiles, which collectively represent the entire learning process. This paper presents an Adaptive Neuro-Fuzzy…

  16. Factors affecting a Mobile Application’s Acceptance : An empirical study of user acceptance of WeChat in China

    Zeng, Zili; HU Xin; Mei, Shuo

    2013-01-01

    Along with the development of smart phones and smart phones operating systems, users of smart phones are able to install software, games and other programs provided by third-party providers. WeChat as a third party software that exists in the current market, is an in-stant messaging application that enables users to send voice, video, pictures and text to their contacts through mobile network. Being a new application, the user acceptance of WeChat has not been studied. Therefore, the result o...

  17. Adaptability of the Logistics System in National Economic Mobilization Based on Blocking Flow Theory

    Xiangyuan Jing

    2014-01-01

    Full Text Available In the process of national economic mobilization, the logistics system usually suffers from negative impact and/or threats of such emergency events as wars and accidents, which implies that adaptability of the logistics system directly determines realization of economic mobilization. And where the real-time rescue operation is concerned, heavy traffic congestion is likely to cause a great loss of or damage to human beings and their properties. To deal with this situation, this article constructs a blocking-resistance optimum model and an optimum restructuring model based on blocking flow theories, of which both are illustrated by numerical cases and compared in characteristics and application. The design of these two models is expected to eliminate or alleviate the congestion situation occurring in the logistics system, thus effectively enhancing its adaptability in the national economic mobilization process.

  18. Improved Adaptive Position Update for Geographic Routing in Mobile Ad Hoc Networks

    Mr.C.Nallusamy*1

    2014-06-01

    Full Text Available In geographic routing, the nodes ought to maintain up-to-date positions of their immediate neighbors. Periodic broadcasting of beacon packets that contain the geographic location coordinates of the nodes may be a new technique utilized by most geographic routing protocols to keep up neighbor positions. The traditional routing schemes demonstrate that periodic beaconing regardless of the node mobility and traffic patterns in the network are not attractive from both update cost and routing performance point of view. Since the Adaptive Position Update (APU strategy for geographic routing, which energetically regulates the frequency of position updates based on the mobility dynamics of the nodes and the forwarding patterns in the network. Generally in Mobile Ad Hoc Networks, if forwarding nodes have high mobility then it may have many chances to make local topology inaccurate in nature. Hence this new Improved Adaptive Position Update (IAPU technique for Geographic routing mainly enhances the APU with low mobility based forwarding node selection. This overcomes the link failure of the entire network in high mobility routing. Thus the experimental results exemplifies that the proposed approach drastically improves the performance of the existing APU.

  19. Device-aware Adaptation of Websites

    Barsomo, Milad; Hurtig, Mats

    2014-01-01

    The use of handheld devices such as smart phones and tablets have exploded in the last few years. These mobile devices differ from regular desktops by having limited battery power, processing power, bandwidth, internal memory, and screen size. With many device types and with mobile adaptation being done in many ways, it is therefore important for websites to adapt to mobile users. This thesis characterise how websites currently are adapting to mobile devices. For our analysis and data collect...

  20. Transferring an educational board game to a multi-user mobile learning game to increase shared situational awareness

    Klemke, Roland; Kurapati, Shalini; Lukosch, Heide; Specht, Marcus

    2015-01-01

    This paper analyses how multi-user mobile games can be beneficial to educational scenarios. It does so in several steps: Firstly, we introduce the field of logistics as a problem domain for an educational challenge. Secondly, we describe the design of an educational board game for the field of disru

  1. Transferring an educational board game to a multi-user mobile learning game to increase shared situational awareness

    Klemke, Roland; Kurapati, Shalini; Kolfschoten, Gwendolyn

    2013-01-01

    Klemke, R., Kurapati, S., & Kolfschoten, G. (2013, 6 June). Transferring an educational board game to a multi-user mobile learning game to increase shared situational awareness. Presentation at the 3rd Irish Symposium on Game Based Learning, Dublin, Ireland. Please see also http://hdl.handle.net/182

  2. Transferring an educational board game to a multi-user mobile learning game to increase shared situational awareness

    Klemke, Roland; Kurapati, Shalini; Kolfschoten, Gwendolyn

    2013-01-01

    Klemke, R., Kurapati, S., & Kolfschoten, G. (2013, 6 June). Transferring an educational board game to a multi-user mobile learning game to increase shared situational awareness. In P. Rooney (Ed.), Proceedings of the 3rd Irish Symposium on Game Based Learning (pp. 8-9). Dublin, Ireland. Please see

  3. StoryStream: unrestricted mobile exploration of city neighbourhoods enriched by the oral presentation of user-generated stories

    T. Vriesede; F. Nack

    2011-01-01

    In this paper we present the StoryStream system, a mobile application that constructs a documentary type of narrative of user generated non-fiction stories, which are orally presented to a visitor of a neighbourhood while he or she freely explores the surroundings. The aim of the system is to enhanc

  4. Adaptive Remote-Sensing Techniques Implementing Swarms of Mobile Agents

    Cameron, S.M.; Loubriel, G.M.; Rbinett, R.D. III; Stantz, K.M.; Trahan, M.W.; Wagner, J.S.

    1999-04-01

    This paper focuses on our recent work at Sandia National Laboratories toward engineering a physics-based swarm of mobile vehicles for distributed sensing applications. Our goal is to coordinate a sensor array that optimizes sensor coverage and multivariate signal analysis by implementing artificial intelligence and evolutionary computational techniques. These intelligent control systems integrate both globally operating decision-making systems and locally cooperative information-sharing modes using genetically-trained neural networks. Once trained, neural networks have the ability to enhance real-time operational responses to dynamical environments, such as obstacle avoidance, responding to prevailing wind patterns, and overcoming other natural obscurants or interferences (jammers). The swarm realizes a collective set of sensor neurons with simple properties incorporating interactions based on basic community rules (potential fields) and complex interconnecting functions based on various neural network architectures, Therefore, the swarm is capable of redundant heterogeneous measurements which furnishes an additional degree of robustness and fault tolerance not afforded by conventional systems, while accomplishing such cognitive tasks as generalization, error correction, pattern recognition, and sensor fission. The robotic platforms could be equipped with specialized sensor devices including transmit/receive dipole antennas, chemical or biological sniffers in combination with recognition analysis tools, communication modulators, and laser diodes. Our group has been studying the collective behavior of an autonomous, multi-agent system applied to emerging threat applications. To accomplish such tasks, research in the fields of robotics, sensor technology, and swarms are being conducted within an integrated program. Mission scenarios under consideration include ground penetrating impulse radar (GPR) for detection of under-ground structures, airborne systems, and plume

  5. Adaptive Remote-Sensing Techniques Implementing Swarms of Mobile Agents

    Asher, R.B.; Cameron, S.M.; Loubriel, G.M.; Robinett, R.D.; Stantz, K.M.; Trahan, M.W.; Wagner, J.S.

    1998-11-25

    In many situations, stand-off remote-sensing and hazard-interdiction techniques over realistic operational areas are often impractical "and difficult to characterize. An alternative approach is to implement an adap- tively deployable array of sensitive agent-specific devices. Our group has been studying the collective be- havior of an autonomous, multi-agent system applied to chedbio detection and related emerging threat applications, The current physics-based models we are using coordinate a sensor array for mukivanate sig- nal optimization and coverage as re,alized by a swarm of robots or mobile vehicles. These intelligent control systems integrate'glob"ally operating decision-making systems and locally cooperative learning neural net- works to enhance re+-timp operational responses to dynarnical environments examples of which include obstacle avoidance, res~onding to prevailing wind patterns, and overcoming other natural obscurants or in- terferences. Collectively',tkensor nefirons with simple properties, interacting according to basic community rules, can accomplish complex interconnecting functions such as generalization, error correction, pattern recognition, sensor fusion, and localization. Neural nets provide a greater degree of robusmess and fault tolerance than conventional systems in that minor variations or imperfections do not impair performance. The robotic platforms would be equipped with sensor devices that perform opticaI detection of biologicais in combination with multivariate chemical analysis tools based on genetic and neural network algorithms, laser-diode LIDAR analysis, ultra-wideband short-pulsed transmitting and receiving antennas, thermal im- a:ing sensors, and optical Communication technology providing robust data throughput pathways. Mission scenarios under consideration include ground penetrating radar (GPR) for detection of underground struc- tures, airborne systems, and plume migration and mitigation. We will describe our

  6. Clustering of Mobile Ad Hoc Networks: An Adaptive Broadcast Period Approach

    Gavalas, Damianos; Konstantopoulos, Charalampos; Mamalis, Basilis

    2011-01-01

    Organization, scalability and routing have been identified as key problems hindering viability and commercial success of mobile ad hoc networks. Clustering of mobile nodes among separate domains has been proposed as an efficient approach to address those issues. In this work, we introduce an efficient distributed clustering algorithm that uses both location and energy metrics for cluster formation. Our proposed solution mainly addresses cluster stability, manageability and energy efficiency issues. Also, unlike existing active clustering methods, our algorithm relieves the network from the unnecessary burden of control messages broadcasting, especially for relatively static network topologies. This is achieved through adapting broadcast period according to mobile nodes mobility pattern. The efficiency, scalability and competence of our algorithm against alternative approaches have been demonstrated through simulation results.

  7. Web maps adaptation for smart phones

    Berkopec, Katja

    2015-01-01

    This thesis presents the web maps viewer adaption for smartphones. The first part describes development of the media maps, with the emphasis on mobile cartography description. The concept of mobile cartography, user tasks in a mobile environment, design and adaptation of mobile maps are described. The second part introduces smartphones, their connection to the Internet and their operating systems. Practical part of the thesis includes the presentation of the mobile tourist map of ...

  8. Toward Mobile Web 2.0-based business methods: Collaborative QoS-information sharing for mobile service users

    Wac, Katarzyna; Bults, Richard; Beijnum, van Bert-Jan; Chen, Hong; Konstantas, Dimitri; Head, M.; Li, Eldon

    2009-01-01

    Mobile service providers (MoSPs) emerge, driven by the ubiquitous availability of mobile devices and wireless communication infrastructures. MoSPs’ customers satisfaction and consequently their revenues, largely depend on the quality of service (QoS) provided by wireless network providers (WNPs) ava

  9. Adaptive Measurement of Well-Being: Maximizing Efficiency and Optimizing User Experience during Individual Assessment.

    Kraatz, Miriam; Sears, Lindsay E; Coberley, Carter R; Pope, James E

    2016-08-01

    Well-being is linked to important societal factors such as health care costs and productivity and has experienced a surge in development activity of both theories and measurement. This study builds on validation of the Well-Being 5 survey and for the first time applies Item Response Theory, a modern and flexible measurement paradigm, to form the basis of adaptive population well-being measurement. Adaptive testing allows survey questions to be administered selectively, thereby reducing the number of questions required of the participant. After the graded response model was fit to a sample of size N = 12,035, theta scores were estimated based on both the full-item bank and a simulation of Computerized Adaptive Testing (CAT). Comparisons of these 2 sets of score estimates with each other and of their correlations with external outcomes of job performance, absenteeism, and hospital admissions demonstrate that the CAT well-being scores maintain accuracy and validity. The simulation indicates that the average survey taker can expect a reduction in number of items administered during the CAT process of almost 50%. An increase in efficiency of this extent is of considerable value because of the time savings during the administration of the survey and the potential improvement of user experience, which in turn can help secure the success of a total population-based well-being improvement program. (Population Health Management 2016;19:284-290). PMID:26674396

  10. Earth science big data at users' fingertips: the EarthServer Science Gateway Mobile

    Barbera, Roberto; Bruno, Riccardo; Calanducci, Antonio; Fargetta, Marco; Pappalardo, Marco; Rundo, Francesco

    2014-05-01

    The EarthServer project (www.earthserver.eu), funded by the European Commission under its Seventh Framework Program, aims at establishing open access and ad-hoc analytics on extreme-size Earth Science data, based on and extending leading-edge Array Database technology. The core idea is to use database query languages as client/server interface to achieve barrier-free "mix & match" access to multi-source, any-size, multi-dimensional space-time data -- in short: "Big Earth Data Analytics" - based on the open standards of the Open Geospatial Consortium Web Coverage Processing Service (OGC WCPS) and the W3C XQuery. EarthServer combines both, thereby achieving a tight data/metadata integration. Further, the rasdaman Array Database System (www.rasdaman.com) is extended with further space-time coverage data types. On server side, highly effective optimizations - such as parallel and distributed query processing - ensure scalability to Exabyte volumes. In this contribution we will report on the EarthServer Science Gateway Mobile, an app for both iOS and Android-based devices that allows users to seamlessly access some of the EarthServer applications using SAML-based federated authentication and fine-grained authorisation mechanisms.

  11. A Location-Based Service Using Geometric Location Methods to Unite Mobile Users

    Wen-Chen Hu

    2016-02-01

    Full Text Available Since the introduction of iPhone in 2007, many location-based services (LBSs have been created and new LBSs are found every day. This research proposes yet another LBS, which is practical and was not found before to the best of authors' knowledge. The problem is described as follows. It happens all the times while several groups of people are traveling towards a destination, they lose contact from each other on the way. This research tries to have the groups travel as closely as possible until they reach the destination. It uses a method of minimum covering ellipses to find whether the groups are separated by more than a threshold/distance. If they are, the system will find a convenient rendezvous for all groups by using a method of geometric median. After meeting at the rendezvous, the groups reset the service and continue their journey. By using this LBS, travelers do not need to worry about losing connections with others. This method can also be applied to the problem of finding a convenient meeting place for mobile users.

  12. A New Concept for Mobile Environmental Education

    Ruchter, Markus

    2007-01-01

    The new concept for mobile environmental education extends the traditional media-based environmental interpretation by means of a mobile context-aware computer. This mobile nature guide system can assist its user during self-determined exploration by adapting its presentation to the usage situation, preferences and current environmental conditions. The impact of the prototype mobile nature guide on environmental literacy and user satisfaction has been compared to traditional media in the field.

  13. Analysis of chromosomal aberrations, micronuclei and hematological disorders among workers of wireless communication instruments and cell phone (Mobile) users

    This study was carried out to investigate the hazardous effect of electromagnetic radiation (EMR) such as chromosomal aberration, disturbed micronucleus formation and hematological disorders that may detected among workers of wireless communication instruments and mobile phone users. Seven individuals ( 3 males and 4 females) of a central workers in the microwave unit of the wireless station and 7 users of Mobil phone (4 males and 3 females ) were volunteered to give blood samples. Chromosomes and micronucleus were prepared for cytogenetic analysis as well as blood film for differential count. The results obtained in the microwave group indicated that, the total summation of all types of aberrations (chromosomes and chromatid aberrations) had a frequency of 6. 14% for the exposed group, whereas, the frequency in the control group amounted to 1.57%. In Mobil phone users, the total summation of all types of aberrations(chromosome and chromatid aberrations) had a frequency of 4.43% for the exposed group and 1.71% for the control group. The incidence of the total number of micronuclei in the exposed microwave group was increased 4.3 folds as compared with those of the control group The incidence of the total number of micronuclei in the exposed mobile phone group was increased 2 fold as compared with those in the control group. On the other hand, normal ranges of total white blood cells counts were determined for mobile phone users but abnormalities in the differential counts of the different types of the white blood cells such as neutropenia, eosinophilia and lymphocytosis were observed in the individuals number 1,2,3,7 in microwave group

  14. Mobile Multimodal Service for a 3G-terminal

    Schie, Thormod

    2006-01-01

    This thesis presents a mobile multimodal service platform, which enable users to interact with automated services using a standard mobile terminal in a user friendly and efficient way. The concept of multimodality was introduced to the world of mobile devices and services because one saw the limitations that conventional interaction methods posed. There is a merging trend that people want to be more mobile and have access to different services when on the move. To adapt to the user needs, the...

  15. Adaptive Image-Based Leader-Follower Approach of Mobile Robot with Omnidirectional Camera

    Dejun Guo; Hesheng Wang; Weidong Chen; Xinwu Liang

    2014-01-01

    This paper focuses on the problem of the adaptive image-based leader-follower formation control of mobile robot with on-board omnidirectional camera. A calibrated omnidirectional camera is fixed on the follower in any position, and a feature point representing the leader can be chosen in any position. An adaptive image-based controller without depending on the velocity of the leader is proposed based on a filter technology. In other words, only by relying on the projection of the feature on t...

  16. Distributed Consensus-Based Robust Adaptive Formation Control for Nonholonomic Mobile Robots with Partial Known Dynamics

    Zhaoxia Peng

    2014-01-01

    Full Text Available This paper investigates the distributed consensus-based robust adaptive formation control for nonholonomic mobile robots with partially known dynamics. Firstly, multirobot formation control problem has been converted into a state consensus problem. Secondly, the practical control strategies, which incorporate the distributed kinematic controllers and the robust adaptive torque controllers, are designed for solving the formation control problem. Thirdly, the specified reference trajectory for the geometric centroid of the formation is assumed as the trajectory of a virtual leader, whose information is available to only a subset of the followers. Finally, numerical results are provided to illustrate the effectiveness of the proposed control approaches.

  17. Traffic-Adaptive Proactive Sp ectrum Handoff Strategy for Graded Secondary Users in Cognitive Radio Networks

    ZHANG Lei; SONG Tiecheng; WU Ming; BAO Xu; GUO Jie; HU Jing

    2015-01-01

    In order to meet diff erent delay require-ments of various communication services in Cognitive ra-dio (CR) networks, Secondary users (SUs) are divided into two classes according to the priority of accessing to spec-trum in this paper. Based on the proactive spectrum hand-off scheme, the Preemptive resume priority (PRP) M/G/1 queueing is used to characterize multiple spectrum hand-off s under two diff erent spectrum handoff strategies. The traffic-adaptive spectrum handoff strategy is proposed for graded SUs so as to minimize the average cumulative hand-off delay. Simulation results not only verify that our theo-retical analysis is valid, but also show that the strategy we proposed can reduce the average cumulative handoff delay evidently. The eff ect of service rate on the proposed spec-trum switching point and the admissible access region are provided.

  18. Adaptive RBFNN Formation Control of Multi-mobile Robots with Actuator Dynamics

    Li Yan-dong

    2013-04-01

    Full Text Available We study the problem of formation control and trajectory tracking for multiple nonholonomic mobile robots with actuator and formation dynamics. An adaptive neural-network (NN control strategy that integrated kinematic controller with input voltages controller of actuator was proposed. A control law was designed by backstepping technique based on separation-bearing formation control structure of leader-follower. The radial basis function neural network (RBFNN was adopted to achieve on-line estimation for the dynamics nonlinear uncertain part for follower and leader robots. The adaptive robust controller was adopted to compensate modeling errors of NN. This strategy not only overcomed all kinds of uncertainties of mobile robots, but also ensured the desired trajectory tracking of robot formation in the case of maintaining formation. The stability and convergence of the control system were proved by using the Lyapunov theory. The simulation results showed the effectiveness of this proposed method.

  19. CONTEXTUAL ADAPTABILITY PLATFORM FOR MOBILE AND UBIQUITOUS LEARNING:A STEP TOWARDS A PERVASIVE LEARNING ENVIRONMENT

    Amal Elhamdaoui

    2011-01-01

    Full Text Available The evolution and convergence of wireless technologies, mobile devices and sensors, has caused profound mutation in applications. Applications for e-learning are no exception to this trend; the mobile, ubiquitous and ambient learning have appeared next to the e-learning. Far from being simple extensions of distance learning, they pose several challenges. Most of learning content used in learning platforms are built to be consumed on broadband networks and powerful terminals. However, technological advances have allowed their consumption over low flow wireless networks, and terminals with limited resources. Consequently, there is a strong need for learning content adaptation systems. Within this article we study the learning pervasive environment that provides an access to information and activities through different context. We define the different dimensions of this context and describe our platform for dynamic adaptation of learning content that representing a brick of MADAR-Learning project.

  20. Fuzzy-Logic Adaptive Queuing for a Heuristic TCP Performance in Mobile Wireless Networks

    Ghaida A. AL-Suhail

    2012-06-01

    Full Text Available In this paper, we propose a new Fuzzy-Logic Adaptive Queuing controller (FLAQ based on a classical Random Early Detection (RED algorithm in wireless cellular network. The controller predicts dynamically the packet dropping rate and the corresponding average queue length. It relies on the average queue length at the base station router and the packet loss rate caused by the channel variations in mobile environment; assuming there is no buffer overflow due to the congestion. Using this model, a heuristic TCP performance can be estimated over a time-varying channel under different conditions of user’s mobility. The results show a significant improvement in TCP throughput performance when the user’s mobility is below 5 m/s; and becomes constant (i.e., close to i.i.d beyond this speed especially at 5% of predefined packet error rate.

  1. Welcome message for the Special Issue "USCIAMO: Urban Sustainable, CollaboratIve, and Adaptive MObility"

    Silvia Gabrielli

    2014-10-01

    Full Text Available Transportation is a key domain to address for promoting sustainability as it accounts for about one third of the energy consumption in the EU and in the US. Nevertheless, changing the transportation habits of citizens is a hard challenge. In this Special Issue of the EAI Endorsed Transactions on Ambient Systems, we present a selection of high-quality papers presented at the workshop on “Urban Sustainable, CollaboratIve, and Adaptive MObility” (USCIAMO, held at the COOP 2014 Conference. The articles address different topics related to the design and deployment of innovative systems and techniques for behavior change in the domain of sustainable mobility, from gamification models and mechanics to encourage sustainable travel behavior to segmentation techniques for personalizing mobility behavior interventions, from participatory design of sustainable mobility applications to innovative frameworks for sustainable commuting at work and transport mode detection.

  2. An energy efficient adaptive HELLO algorithm for mobile ad hoc networks

    He, Danping; Mitton, Nathalie; Simplot-Ry, David

    2013-01-01

    International audience HELLO protocol or neighborhood discovery is essential in wireless ad hoc networks. It makes the rules for nodes to claim their existence/aliveness. In the presence of node mobility, no x optimal HELLO frequency and optimal transmission range exist to maintain accurate neighborhood tables while reducing the energy consumption and bandwidth occupation. Thus a Turnover based Frequency and transmission Power Adaptation algorithm (TFPA) is presented in this paper. The met...

  3. A Turnover based Adaptive HELLO Protocol for Mobile Ad Hoc and Sensor Networks

    Ingelrest, François; Mitton, Nathalie; Simplot-Ryl, David

    2007-01-01

    International audience We present a turnover based adaptive HELLO protocol (TAP), which enables nodes in mobile networks to dynamically adjust their HELLO messages frequency depending on the current speed of nodes. To the best of our knowledge, all existing solutions are based on specific assumptions (\\eg{} slotted networks) and/or require specific hardware (\\eg{} GPS) for speed evaluation. One of the key aspects of our solution is that no additional hardware is required since it does not ...

  4. A Hybrid Adaptive Protocol for Reliable Data Delivery in WSNs with Multiple Mobile Sinks

    Anastasi, Giuseppe; Borgia, Eleonora; Conti, Marco; Gregori, Enrico

    2010-01-01

    In this paper we deal with reliable and energy-efficient data delivery in sparse Wireless Sensor Networks with multiple Mobile Sinks (MSs). This is a critical task, especially when MSs move randomly, as interactions with sensor nodes are unpredictable, typically of short duration, and affected by message losses. In this paper we propose an adaptive data delivery protocol that combines efficiently erasure coding with an ARQ scheme. The key features of the proposed protocol are: (i) the use of ...

  5. Learner Open Modeling in Adaptive Mobile Learning System for Supporting Student to Learn English

    Van Cong Pham; Viet Anh Nguyen

    2011-01-01

    This paper represents a personalized context-aware mobile learning architecture for supporting student to learn English as foreign language in order to prepare for TOEFL test. We consider how to apply open learner modeling techniques to adapt contents for different learners based on context, which includes location, amount of time to learn, the manner as well as learner's knowledge in learning progress. Through negotiation with system, the editable learner model will be updated to support ada...

  6. Model-based provisioning and management of adaptive distributed communication in mobile cooperative systems

    Ramanathan, Sakkaravarthi; Bouassida Rodriguez, Ismael; Drira, Khalil; Chassot, Christophe; Michelle, Sibilla; DESPRATS, Thierry

    2011-01-01

    Adaptation of communication is required to maintain the reliable connection and to ensure the minimum quality in collaborative activities. Within the framework of wireless environment, how can host entities be handled in the event of a sudden unexpected change in communication and reliable sources? This challenging issue is addressed in the context of Emergency rescue system carried out by mobile devices and robots during calamities or disaster. For this kind of scenario, this book proposes a...

  7. Application of Adaptive Extended Kalman Smoothing on INS/WSN Integration System for Mobile Robot Indoors

    Xiyuan Chen; Yuan Xu; Qinghua Li

    2013-01-01

    The inertial navigation systems (INS)/wireless sensor network (WSN) integration system for mobile robot is proposed for navigation information indoors accurately and continuously. The Kalman filter (KF) is widely used for real-time applications with the aim of gaining optimal data fusion. In order to improve the accuracy of the navigation information, this work proposed an adaptive extended Kalman smoothing (AEKS) which utilizes inertial measuring units (IMUs) and ultrasonic positioning syste...

  8. Adaptive Hybrid Visual Servo Regulation of Mobile Robots Based on Fast Homography Decomposition

    Chunfu Wu

    2015-01-01

    Full Text Available For the monocular camera-based mobile robot system, an adaptive hybrid visual servo regulation algorithm which is based on a fast homography decomposition method is proposed to drive the mobile robot to its desired position and orientation, even when object’s imaging depth and camera’s position extrinsic parameters are unknown. Firstly, the homography’s particular properties caused by mobile robot’s 2-DOF motion are taken into account to induce a fast homography decomposition method. Secondly, the homography matrix and the extracted orientation error, incorporated with the desired view’s single feature point, are utilized to form an error vector and its open-loop error function. Finally, Lyapunov-based techniques are exploited to construct an adaptive regulation control law, followed by the experimental verification. The experimental results show that the proposed fast homography decomposition method is not only simple and efficient, but also highly precise. Meanwhile, the designed control law can well enable mobile robot position and orientation regulation despite the lack of depth information and camera’s position extrinsic parameters.

  9. Self-expression, group affiliation, pleasure and memory as predictors of consumer product attachment and satisfaction among mobile phone users

    Kagiso Tlhabano; Morekwe Selemogwe; Shyngle K. Balogun; Oluwasola Adewale Ibrahim

    2013-01-01

    In the post-purchase behaviour of a product, there are challenges with change in the degree of consumer product attachment, and these challenges affect consumer product satisfaction overtime. This study investigated how self-expression, group affiliation, memory, and demographic variables predicted consumer product attachment and satisfaction among mobile phone users in Ibadan. Three hundred students of the University of Ibadan were selected using convenient random selection. Their mean age w...

  10. An Adaptive Handover Prediction Scheme for Seamless Mobility Based Wireless Networks

    Ali Safa Sadiq

    2014-01-01

    Full Text Available We propose an adaptive handover prediction (AHP scheme for seamless mobility based wireless networks. That is, the AHP scheme incorporates fuzzy logic with AP prediction process in order to lend cognitive capability to handover decision making. Selection metrics, including received signal strength, mobile node relative direction towards the access points in the vicinity, and access point load, are collected and considered inputs of the fuzzy decision making system in order to select the best preferable AP around WLANs. The obtained handover decision which is based on the calculated quality cost using fuzzy inference system is also based on adaptable coefficients instead of fixed coefficients. In other words, the mean and the standard deviation of the normalized network prediction metrics of fuzzy inference system, which are collected from available WLANs are obtained adaptively. Accordingly, they are applied as statistical information to adjust or adapt the coefficients of membership functions. In addition, we propose an adjustable weight vector concept for input metrics in order to cope with the continuous, unpredictable variation in their membership degrees. Furthermore, handover decisions are performed in each MN independently after knowing RSS, direction toward APs, and AP load. Finally, performance evaluation of the proposed scheme shows its superiority compared with representatives of the prediction approaches.

  11. Learning from adaptive neural network output feedback control of a unicycle-type mobile robot.

    Zeng, Wei; Wang, Qinghui; Liu, Fenglin; Wang, Ying

    2016-03-01

    This paper studies learning from adaptive neural network (NN) output feedback control of nonholonomic unicycle-type mobile robots. The major difficulties are caused by the unknown robot system dynamics and the unmeasurable states. To overcome these difficulties, a new adaptive control scheme is proposed including designing a new adaptive NN output feedback controller and two high-gain observers. It is shown that the stability of the closed-loop robot system and the convergence of tracking errors are guaranteed. The unknown robot system dynamics can be approximated by radial basis function NNs. When repeating same or similar control tasks, the learned knowledge can be recalled and reused to achieve guaranteed stability and better control performance, thereby avoiding the tremendous repeated training process of NNs. PMID:26830003

  12. INVESTIGATION THE ROLE OF MOBILE USER’S GENDER ON ACCEPTANCE OF PERMISSION BASE MOBILE MARKETING ON IRANIAN MOBILE USERS AND CONSUMER RIGHTS PROTECTION GUIDELINES

    Amir Bigdeli; Pejman Jafari; Farhad Ghaffari

    2014-01-01

    Recent progression on Internet, mobile phones and also the other communication tools allow companies to gain benefit from new applications such as SMS advertisement. Despite of these commercial opportunities, development of SMS advertisements are limited by some barriers such as invasion of mobile user’s consumer rights with unsolicited sms advertising. On one hand in developed countries, there are regulations for mobile user’s privacy protection, but on the other hand, these rule...

  13. Adaptive Slot Allocation And Bandwidth Sharing For Prioritized Handoff Calls In Mobile Netwoks

    Malathy, S; Murugan, K; Lokesh, S

    2010-01-01

    Mobility management and bandwidth management are two major research issues in a cellular mobile network. Mobility management consists of two basic components: location management and handoff management. To Provide QoS to the users Handoff is a key element in wireless cellular networks. It is often initiated either by crossing a cell boundary or by deterioration in the quality of signal in the current channel. In this paper, a new admission control policy for cellular mobile network is being proposed. Two important QoS parameter in cellular networks are Call Dropping Probability (CDP) and Handoff Dropping Probability (HDP). CDP represents the probability that a call is dropped due to a handoff failure. HDP represents the probability of a handoff failure due to insufficient available resources in the target cell. Most of the algorithms try to limit the HDP to some target maximum but not CDP. In this paper, we show that when HDP is controlled, the CDP is also controlled to a minimum extent while maintaining lowe...

  14. The Development of a Digital Marketing Strategy to Gain Active Mobile Game Users in Japan

    Rönkkö, Makiyo

    2014-01-01

    Japan is the world’s biggest spender on mobile apps. This makes it an attractive market, but entering the Japan market is very difficult for Finnish mobile software developers. The goal of this thesis is to identify possible constraints that limit mobile game companies in the Japanese market, and analyze the means of increasing brand awareness and acquiring active game players. The focus is on finding the key elements required for building a digital marketing strategy targeted towards Japanes...

  15. Efficient Authoring of SCORM Courseware Adapted to User Learning Style: The Case of ProPer SAT

    Kazanidis, Ioannis; Satratzemi, Maya

    Online courses are the most popular way to deliver knowledge for distance learning. New researches attempt to personalize the educational process with the use of the Adaptive Educational Hypermedia Systems. Moreover, due to the significant amount of time, money and effort devoted to creating online courses, developers strive to incorporate standards, such as SCORM, for the reusability, interoperability and durability of the educational content. However, it is a difficult task for teachers without programming knowledge to design and author adaptive courses. This work presents ProPer SAT, an authoring tool implemented for quick and easy SCORM courseware construction which can also be adapted to specific user learning styles.

  16. What leads to readers’ satisfaction with the mobile news apps service? An investigation into the roles of content originality and user experience

    Wenjing; HE; Xiaoyu; CHEN; Yichen; LI; Yueyi; QIU

    2015-01-01

    Purpose: This study aims to explore whether content originality and user experience have positive effects on online news readers’ satisfaction with the mobile apps service.Design/methodology/approach: Data was collected via a Web-based survey. Data analysis of this study can be divided into two stages. In the first stage, a descriptive statistical analysis was conducted based on a sample of 612 respondents. In the second stage, the correlation among content originality, user experience and satisfaction was analyzed based on a sample of 377 mobile news apps users. Findings: Results of the first stage showed that social media and mobile news apps were the most important tools for users to access news, and different types of media were playing complementary roles in information transmission. Users held a positive attitude toward their mobile news reading experience and they described news they read on mobile apps with such words as "interesting", "instant", "positive", "profound", and "ironic". Results of the second stage confirmed our hypothesis that content originality and user experience both had positive impacts on user satisfaction.Research limitations: The questionnaires were distributed entirely online, so the sample may not be representative of the general population being studied and thus undermine the reliability and generalization of the findings to some extent. Moreover, this study adopted only one method(survey) and more methods such as interviews can be used to improve the accuracy of the results.Practical implications: The findings of this study can not only provide insights into a better understanding of users’ mobile reading behavior, but also help mobile information service providers attract more users.Originality/value: This is one of the first studies to explore the effects of content originality and user experience on online news readers’ satisfaction with the mobile apps service.

  17. Map-based mobile services design, interaction and usability

    Meng, Liqui; Winter, Stephan; Popovich, Vasily

    2008-01-01

    Reports the research and technical achievements on the following theme blocks: Design of mobile map services and its constraints; Typology and usability of mobile map services; Visualization solutions on small displays for time-critical tasks; Mobile map users; Interaction and adaptation in mobile environments; and more.

  18. TEDS-M 2008 User Guide for the International Database. Supplement 2: National Adaptations of the TEDS-M Questionnaires

    Brese, Falk, Ed.

    2012-01-01

    This supplement contains all adaptations made by countries to the international version of the TEDS-M questionnaires under careful supervision of and approval by the TEDS-M International Study Center at Michigan State University. This information provides users of the TEDS-M International Database with a guide to evaluate the availability of…

  19. End-User Attitudes towards Location-Based Services and Future Mobile Wireless Devices: The Students’ Perspective

    Bogdan Cramariuc

    2011-07-01

    Full Text Available Nowadays, location-enabled mobile phones are becoming more and more widespread. Various players in the mobile business forecast that, in the future, a significant part of total wireless revenue will come from Location-Based Services (LBS. An LBS system extracts information about the user’s geographical location and provides services based on the positioning information. A successful LBS service should create value for the end-user, by satisfying some of the users’ needs or wants, and at the same time preserving the key factors of the mobile wireless device, such as low costs, low battery consumption, and small size. From many users’ perspectives, location services and mobile location capabilities are still rather poorly known and poorly understood. The aim of this research is to investigate users’ views on the LBS, their requirements in terms of mobile device characteristics, their concerns in terms of privacy and usability, and their opinion on LBS applications that might increase the social wellbeing in the future wireless world. Our research is based on two surveys performed among 105 students (average student age: 24 years from two European technical universities. The survey questions were intended to solicit the youngsters’ views on present and future technological trends and on their perceived needs and wishes regarding Location-Based Services, with the aim of obtaining a better understanding of designer constraints when building a location receiver and generating new ideas related to potential future killer LBS applications.

  20. Overcoming the language barrier in mobile user interface design: A case study on a mobile health app

    Ross, Jason; Gao, Jing

    2016-01-01

    This research report proposes a structured solution to address the need for awareness of cultural and language in user design. It will include evaluated research on established methods that already exist. Discussed ideas about how to address this situation include: what others have found to take into consideration when using design principles to develop an interface, detailed troubles and critical issues that have been previously identified and also ways that have been found already to overco...

  1. User Acceptance of Mobile Technology: A Campus-Wide Implementation of Blackboard's Mobile™ Learn Application

    Chen, Baiyun; Sivo, Stephen; Seilhamer, Ryan; Sugar, Amy; Mao, Jin

    2013-01-01

    Mobile learning is a fast growing trend in higher education. This study examined how an extended technology acceptance model (TAM) could evaluate and predict the use of a mobile application in learning. A path analysis design was used to measure the mediating effects on the use of Blackboard's Mobile™ Learn application in coursework (N = 77). The…

  2. Adaptation of the Monetary Choice Questionnaire to accommodate extreme monetary discounting in cocaine users.

    Towe, Sheri L; Hobkirk, Andréa L; Ye, Daniel G; Meade, Christina S

    2015-12-01

    Delay discounting, which refers to the phenomenon that rewards decrease in subjective value as the delay associated with their receipt increases, is a paradigm that has been used extensively in substance abuse research to understand impulsive decision making. One common measure to assess delay discounting is the Monetary Choice Questionnaire (MCQ) developed by Kirby, Petry, and Bickel (1999). While the MCQ has great utility because of its simplicity and brief administration time, it is possible that the MCQ produces a ceiling effect in estimating delay discounting parameters in highly impulsive individuals. In the present study, we adapted the MCQ to attempt to address this ceiling effect by extending the original scale with 9 items, and we then compared scores on the original MCQ with the extended MCQ in a sample of active cocaine users. The ceiling effect, while observed in the original MCQ scores for over a quarter of the sample, was largely eliminated with the extended scale. Highly impulsive participants, whose scores on the extended scale exceeded the highest possible score on the original scale, had higher levels of sensation seeking compared to other participants, but not trait impulsivity. The extended MCQ may be useful in populations with high rates of impulsivity, where the original measure may underestimate discounting rates due to a ceiling effect. PMID:26191820

  3. Client Mobile Software Design Principles for Mobile Learning Systems

    Qing Tan

    2009-01-01

    Full Text Available In a client-server mobile learning system, client mobile software must run on the mobile phone to acquire, package, and send student’s interaction data via the mobile communications network to the connected mobile application server. The server will receive and process the client data in order to offer appropriate content and learning activities. To develop the mobile learning systems there are a number of very important issues that must be addressed. Mobile phones have scarce computing resources. They consist of heterogeneous devices and use various mobile operating systems, they have limitations with their user/device interaction capabilities, high data communications cost, and must provide for device mobility and portability. In this paper we propose five principles for designing Client mobile learning software. A location-based adaptive mobile learning system is presented as a proof of concept to demonstrate the applicability of these design principles.

  4. Green Mobile Clouds: Network Coding and User Cooperation for Improved Energy Efficiency

    Heide, Janus; Fitzek, Frank; Pedersen, Morten Videbæk;

    2012-01-01

    This paper highlights the benefits of user cooperation and network coding for energy saving in cellular networks. It is shown that these techniques allow for reliable and efficient multicast services from both a user and network perspective. The working principles and advantages in terms of energ...

  5. An Adaptive Control Scheme for Nonholonomic Mobile Robot with Parametric Uncertainty

    F. Touati

    2008-11-01

    Full Text Available This paper addresses the problem of stabilizing the dynamic model of a nonholonomic mobile robot. A discontinuous adaptive state feedback controller is derived to achieve global stability and convergence of the trajectories of the of the closed loop system in the presence of parameter modeling uncertainty. This task is achieved by a non smooth transformation in the original system followed by the derivation of a smooth time invariant control in the new coordinates. The stability and convergence analysis is built on Lyapunov stability theory.

  6. Design and Test of a Hybrid Foot Force Sensing and GPS System for Richer User Mobility Activity Recognition

    Stefan Poslad

    2013-11-01

    Full Text Available Wearable and accompanied sensors and devices are increasingly being used for user activity recognition. However, typical GPS-based and accelerometer-based (ACC methods face three main challenges: a low recognition accuracy; a coarse recognition capability, i.e., they cannot recognise both human posture (during travelling and transportation mode simultaneously, and a relatively high computational complexity. Here, a new GPS and Foot-Force (GPS + FF sensor method is proposed to overcome these challenges that leverages a set of wearable FF sensors in combination with GPS, e.g., in a mobile phone. User mobility activities that can be recognised include both daily user postures and common transportation modes: sitting, standing, walking, cycling, bus passenger, car passenger (including private cars and taxis and car driver. The novelty of this work is that our approach provides a more comprehensive recognition capability in terms of reliably recognising both human posture and transportation mode simultaneously during travel. In addition, by comparing the new GPS + FF method with both an ACC method (62% accuracy and a GPS + ACC based method (70% accuracy as baseline methods, it obtains a higher accuracy (95% with less computational complexity, when tested on a dataset obtained from ten individuals.

  7. Fuzzy adaptive Kalman filter for indoor mobile target positioning with INS/WSN integrated method

    杨海; 李威; 罗成名

    2015-01-01

    Pure inertial navigation system (INS) has divergent localization errors after a long time. In order to compensate the disadvantage, wireless sensor network (WSN) associated with the INS was applied to estimate the mobile target positioning. Taking traditional Kalman filter (KF) as the framework, the system equation of KF was established by the INS and the observation equation of position errors was built by the WSN. Meanwhile, the observation equation of velocity errors was established by the velocity difference between the INS and WSN, then the covariance matrix of Kalman filter measurement noise was adjusted with fuzzy inference system (FIS), and the fuzzy adaptive Kalman filter (FAKF) based on the INS/WSN was proposed. The simulation results show that the FAKF method has better accuracy and robustness than KF and EKF methods and shows good adaptive capacity with time-varying system noise. Finally, experimental results further prove that FAKF has the fast convergence error, in comparison with KF and EKF methods.

  8. Application of Adaptive Extended Kalman Smoothing on INS/WSN Integration System for Mobile Robot Indoors

    Xiyuan Chen

    2013-01-01

    Full Text Available The inertial navigation systems (INS/wireless sensor network (WSN integration system for mobile robot is proposed for navigation information indoors accurately and continuously. The Kalman filter (KF is widely used for real-time applications with the aim of gaining optimal data fusion. In order to improve the accuracy of the navigation information, this work proposed an adaptive extended Kalman smoothing (AEKS which utilizes inertial measuring units (IMUs and ultrasonic positioning system. In this mode, the adaptive extended Kalman filter (AEKF is used to improve the accuracy of forward Kalman filtering (FKF and backward Kalman filtering (BKF, and then the AEKS and the average filter are used between two output timings for the online smoothing. Several real indoor tests are done to assess the performance of the proposed method. The results show that the proposed method can reduce the error compared with the INS-only, least squares (LS solution, and AEKF.

  9. Spatial narratives from mobile GIS

    Møller-Jensen, Lasse

    Principles of a mobile gps-enabled gis acting as a tourist infor­mation sys­tem are discussed and exemplified with special focus on the narrative aspects of tourist guidance. Flexible adaptation to user movements is accomplished by providing information about objects that the user passes as well as...

  10. Spatial narratives from mobile GIS

    Møller-Jensen, Lasse

    2007-01-01

    Principles of a mobile gps-enabled gis acting as a tourist infor­mation sys­tem are discussed and exemplified with special focus on the narrative aspects of tourist guidance. Flexible adaptation to user movements is accomplished by providing information about objects that the user passes as well as...

  11. Adaptive Control Parameters for Dispersal of Multi-Agent Mobile Ad Hoc Network (MANET) Swarms

    Kurt Derr; Milos Manic

    2013-11-01

    A mobile ad hoc network is a collection of independent nodes that communicate wirelessly with one another. This paper investigates nodes that are swarm robots with communications and sensing capabilities. Each robot in the swarm may operate in a distributed and decentralized manner to achieve some goal. This paper presents a novel approach to dynamically adapting control parameters to achieve mesh configuration stability. The presented approach to robot interaction is based on spring force laws (attraction and repulsion laws) to create near-optimal mesh like configurations. In prior work, we presented the extended virtual spring mesh (EVSM) algorithm for the dispersion of robot swarms. This paper extends the EVSM framework by providing the first known study on the effects of adaptive versus static control parameters on robot swarm stability. The EVSM algorithm provides the following novelties: 1) improved performance with adaptive control parameters and 2) accelerated convergence with high formation effectiveness. Simulation results show that 120 robots reach convergence using adaptive control parameters more than twice as fast as with static control parameters in a multiple obstacle environment.

  12. Identifying Mobile Phone Usability Issues in Informal Swedish Language Learning:What users think about it?

    Aizezi, Zulifuyemu

    2015-01-01

    This thesis studies the usability issues of the mobile phone in informal Swedish language learning. The concept of usability is defined by expanding the technical usability attributes of Jakob Nielsen with other recent attributes derived from considering the technical aspects of mobile learning (m-learning). Thus, the ultimate structure of the usability factors that are discussed in this study consists of: accessibility, easy-to-learn, technical design, efficiency and satisfaction. With the s...

  13. Effects Of Mobile Phones Radiation On The EEG And EMG Of Human Users

    Fathy El-Komey

    2005-01-01

    This study focuses on the effect of mobile phone radiation emissions on the human electroencephalograph (EEG) and electromyogram activity (EMG). EEG and EMG recordings from 50 (male and female) awake subjects were taken during exposure to radiation emissions from a mobile phone. Our results demonstrated that stimulation effects became apparent on EEG at first, and changes varied strongly at the end of the experiment to depression. EEG and EMG showed interesting changes.The results suggested t...

  14. User Intentions to Adopt Mobile Payment Services: A Study of Early Adopters in Thailand

    CHANCHAI PHONTHANUKITITHAWORN; CARMINE SELLITTO; MICHELLE FONG

    2015-01-01

    The adoption and use of M-payment services has become critical for entities involved in the mobile commerce industry in Asian countries. This paper reports on research that investigated the factors affecting consumer intentions to adopt mobile payment (Mpayment) services in Thailand. The study developed a model based on an extended version of the technology acceptance model (TAM) that was modified using constructs that were explained in terms of Hofstede’s cultural dimensions allowing the fin...

  15. Factors affecting mobile gaming adoption - A study of Chinese users and contexts

    Pan, Tianyi

    2011-01-01

    Objective of the Study The objective of the study was to discover the main factors affecting mobile gaming in the Chinese context. The theoretical base of the study was built on the Technology Acceptance Model (TAM) and its later revisions. Special attention was paid on recent TAM studies on mobile gaming in China or other East Asian areas. In addition, to bring the TAM theory closer to marketing applications, the study produced clusters from the respondent data in order to identify diffe...

  16. Mobile Lexicography

    Køhler Simonsen, Henrik

    2015-01-01

    Mobile phones are ubiquitous and have completely transformed the way we live, work, learn and conduct our everyday activities. Mobile phones have also changed the way users access lexicographic data. In fact, it can be argued that mobile phones and lexicography are not yet compatible. Modern users...... are already mobile – but lexicography is not yet fully ready for the mobile challenge, mobile users and mobile user situations. The article is based on empirical data from two surveys comprising 10 medical doctors, who were asked to look up five medical substances with the medical dictionary app...... mobile lexicography....

  17. Assessing the feasibility and scope of community mobilization of injecting drug users in HIV/AIDS prevention: A preliminary study in Manipur and Nagaland

    Ngaihte, Priscilla C

    2010-01-01

    Community mobilization has increasingly become a key strategy and continues to be a proven success to HIV prevention in the realm of sex workers, men having sex with men and transgenders who by a presence of intrinsic factors have enormous benefits in terms of legal recognition, protection, health and human rights by being mobilized as a community. Injecting Drug Users(IDU) are yet to exhibit the same levels of enthusiasm and success in the mobilization approach of thel HIV intervention progr...

  18. Antecedent and Outcomes of Satisfaction with Service Recovery: A Study among Mobile Phone Users in Central Region of Malaysia

    Niriender Kumar Piaralal

    2014-05-01

    Full Text Available Purpose: In a competitive service industry, satisfying customer is paramount for sustainability of the organization. With this understanding this current study is investigating on antecedent and outcomes of satisfaction with service recovery in the mobile phone industry with introduction of Mobile Number Portability (MNP in Malaysia recently.Design/Methodology: Antecedent of satisfaction with service recovery is perception of justice which consists of interactional, procedural and distributive justice. Outcomes of satisfaction with recovery are behavioral outcomes which are consisting of word of mouth (WOM, customer loyalty and trust. In addition this study also added moderator (service failure severity to understand the relationship between perception of justice and satisfaction with service recovery. Data gathered by self-administered questionnaires from 280 mobile phone users in central region of Peninsular Malaysia by using convenience sampling technique. Data was analyzed using multiple and hierarchical regression. Findings: The findings indicate perception of justice is an antecedent to satisfaction with service recovery. Service failure severity was found to have moderating effect between perception of justice and satisfaction with recovery. Findings also indicate outcomes of satisfaction with service recovery are behavioral outcomes which consist of word of mouth, customer loyalty and trust. Limitations: The limitations of this studied noted and further research suggestions are also included that are very important for service recovery. Values: This research had enhanced and widens the understanding on the effect of service failure severity and effect of service recovery on customer satisfaction for mobile industry in Malaysia.

  19. PERFORMANCE ANALYSIS OF USER FAIR-BASED RELAY ADAPTIVE POWER ALLOCATION IN PHYSICAL-LAYER NETWORK CODING COOPERATION

    Cheng Yulun; Yang Longxiang

    2012-01-01

    Network Coding (NC) is an effective technology to enhance the cooperative system spectral efficiency.However,since it is network-oriented,the existing performance metric of single-user outage can not comprehensively evaluate its gain and the impact to the entire network,which affect the user fairness.This paper proposes two novel user fair-based adaptive relay power allocation algorithms in single-relay NC cooperative multiple access channels.Firstly,common outage probability is employed as the performance metric,and to minimize it,a specific condition is deduced.On this basis,the instantaneous channel information-based adaptive relay power allocation scheme and the channel statistic information-based one with lower complexity are designed respectively,which make users' signals superimposed at accurately calculated proportion to maintain fairness.Simulation results show that compared with other existing schemes,the proposed schemes can best maintain user fairness,and effectively improve the common outage performance of the whole system,at the expense of small spectral efficiency.

  20. A mobile Virtual Butler to bridge the gap between users and ambient assisted living: a Smart Home case study.

    Costa, Nuno; Domingues, Patricio; Fdez-Riverola, Florentino; Pereira, António

    2014-01-01

    Ambient Intelligence promises to transform current spaces into electronic environments that are responsive, assistive and sensitive to human presence. Those electronic environments will be fully populated with dozens, hundreds or even thousands of connected devices that share information and thus become intelligent. That massive wave of electronic devices will also invade everyday objects, turning them into smart entities, keeping their native features and characteristics while seamlessly promoting them to a new class of thinking and reasoning everyday objects. Although there are strong expectations that most of the users' needs can be fulfilled without their intervention, there are still situations where interaction is required. This paper presents work being done in the field of human-computer interaction, focusing on smart home environments, while being a part of a larger project called Aging Inside a Smart Home. This initiative arose as a way to deal with a large scourge of our country, where lots of elderly persons live alone in their homes, often with limited or no physical mobility. The project relies on the mobile agent computing paradigm in order to create a Virtual Butler that provides the interface between the elderly and the smart home infrastructure. The Virtual Butler is receptive to user questions, answering them according to the context and knowledge of the AISH. It is also capable of interacting with the user whenever it senses that something has gone wrong, notifying next of kin and/or medical services, etc. The Virtual Butler is aware of the user location and moves to the computing device which is closest to the user, in order to be always present. Its avatar can also run in handheld devices keeping its main functionality in order to track user when s/he goes out. According to the evaluation carried out, the Virtual Butler is assessed as a very interesting and loved digital friend, filling the gap between the user and the smart home. The

  1. Self-expression, group affiliation, pleasure and memory as predictors of consumer product attachment and satisfaction among mobile phone users

    Kagiso Tlhabano

    2013-03-01

    Full Text Available In the post-purchase behaviour of a product, there are challenges with change in the degree of consumer product attachment, and these challenges affect consumer product satisfaction overtime. This study investigated how self-expression, group affiliation, memory, and demographic variables predicted consumer product attachment and satisfaction among mobile phone users in Ibadan. Three hundred students of the University of Ibadan were selected using convenient random selection. Their mean age was 20.7 and standard deviation of 2.52. A structured questionnaire consisting of the socio demographic section, measure of self-expression, group affiliation, memory, pleasure, consumer attachment and product satisfaction was used to collect the data. Using multiple regression analysis, the results showed that self-expression, group affiliation, memories and pleasure jointly predicted consumer attachment among mobile phone users, F (4,299 = 48.47; P<0.05 and they contributed 40% to the variance of consumer attachment. Self-expression (β = 0.26, t = 4.44, P<0.05, memory (β = 0.29, t = 4.97, P<0.05, and pleasure (β = 0.28, t =5.01, P<0.05 independently predicted consumer attachment while group affiliation did not. In addition, self- expression, group affiliation, memories and pleasure jointly predicted product satisfaction, F (4,299 =39.79; P<0.05 and they contributed 35% to the variance of product satisfaction. Pleasure (β=0.596, t =10.35, P<0.05 independently predicted product satisfaction while self-expression, group affiliation and memory did not. Furthermore, age, gender, mobile type, ethnicity and religion did not jointly and independently predict consumer product satisfaction. These findings have implication for mobile phone manufacturers in terms of product improvement and building a strategic marketing channel that would meet the needs of global consumers.

  2. Automated motive-based user review analysis in the context of mobile app acceptance: Opportunities and applications

    Elisabeth Pergler

    2012-06-01

    Full Text Available The increasing amount and importance of user-generated content that is available in the web necessitates methods of its effective and efficient utilization. In this paper a system is presented that enables automated classification of user reviews concerning the usage motives mentioned in the reviews. Four possible applications of the system are discussed in detail in the course of this paper: a learning environment for mobile app development, a download prognosis mechanism, an app prizing decision support system, and a recommendation system. These applications are evaluated concerning state-of-the-art methods that currently address the challenge as well as advantages of the implementation of a motive-based system in the particular business processes.

  3. Applying Task Modeling and Pattern-Based Techniques in Reengineering Processes for Mobile Learning User Interfaces: A Case Study

    Ana Isabel Molina

    2007-06-01

    Full Text Available In the last years there has been a high production of groupware systems. However, most of these systems have been based on the desktop metaphor. We propose a translation process based on the use of the conceptual model (or, particularly, on the task model and the data model of the original application. From this model and by means of a pattern-based reengineering process, we obtain mobile versions of the original systems. In this paper the user interface reengineering process is described and an example of the application of patterns for the evolution of a specific system, Domosim-TPC, is shown.

  4. Mobile tools for Windows: user guide : report produced in the context of the Inventory Data Capture Tools Risk Global Component

    Jordan, C.J.; Adlam, K.; Lawrie, K.; Shelley, W.; Bevington, J.

    2013-01-01

    The aim of this document is to provide guidelines for the use of the digital Windows Mobile Tools that have been designed and built to collect building inventory pre- and post-earthquake events. The guide instructs users how to install the software on a Windows device and provides step-by-step instructions for collecting and managing the data that has been collected. It is expected that the field staff are already experts in collecting building inventory, therefore this guide does not prov...

  5. Quick Local Repair Scheme using Adaptive Promiscuous Mode in Mobile Ad Hoc Networks

    Joo-Sang Youn

    2006-05-01

    Full Text Available In mobile ad hoc networks (MANETs, there is frequently disconnected a route consisting of multi- hop from a source to a destination because of the dynamic nature such as the topology change caused by nodes’ mobility. To overcome this situation, existing routing protocols for MANETs have performed route repair scheme to repair the disconnected route. However, existing reactive routing protocols have the problem which is that a source node unnecessarily performs re-discovers the whole path when just one node moves, even if the rest of path needs not to be re-arranged. Therefore, the time for re-discovery of the whole path may often take too long. To solve the problem, we propose a new local repair scheme using promiscuous mode. Our scheme is mainly composed of two parts: adaptive promiscuous mode and quick local repair scheme. Adaptive promiscuous mode is to repeat the switching processes between promiscuous mode and nonpromiscuous mode to overcome energy limit caused by using promiscuous mode in overall time and quick local repair scheme is to fast perform the local re-route discovery process with the information of the active connection in the local area acquired by promiscuous mode. With simulation in the various number of connection, We demonstrate the better network performances achieved with the proposed schemes as compared with AODV as reference model that do not provide local repair scheme.

  6. Intelligent Broadcasting in Mobile Ad Hoc Networks: Three Classes of Adaptive Protocols

    Michael D. Colagrosso

    2006-11-01

    Full Text Available Because adaptability greatly improves the performance of a broadcast protocol, we identify three ways in which machine learning can be applied to broadcasting in a mobile ad hoc network (MANET. We chose broadcasting because it functions as a foundation of MANET communication. Unicast, multicast, and geocast protocols utilize broadcasting as a building block, providing important control and route establishment functionality. Therefore, any improvements to the process of broadcasting can be immediately realized by higher-level MANET functionality and applications. While efficient broadcast protocols have been proposed, no single broadcasting protocol works well in all possible MANET conditions. Furthermore, protocols tend to fail catastrophically in severe network environments. Our three classes of adaptive protocols are pure machine learning, intra-protocol learning, and inter-protocol learning. In the pure machine learning approach, we exhibit a new approach to the design of a broadcast protocol: the decision of whether to rebroadcast a packet is cast as a classification problem. Each mobile node (MN builds a classifier and trains it on data collected from the network environment. Using intra-protocol learning, each MN consults a simple machine model for the optimal value of one of its free parameters. Lastly, in inter-protocol learning, MNs learn to switch between different broadcasting protocols based on network conditions. For each class of learning method, we create a prototypical protocol and examine its performance in simulation.

  7. Intelligent Broadcasting in Mobile Ad Hoc Networks: Three Classes of Adaptive Protocols

    Colagrosso Michael D

    2007-01-01

    Full Text Available Because adaptability greatly improves the performance of a broadcast protocol, we identify three ways in which machine learning can be applied to broadcasting in a mobile ad hoc network (MANET. We chose broadcasting because it functions as a foundation of MANET communication. Unicast, multicast, and geocast protocols utilize broadcasting as a building block, providing important control and route establishment functionality. Therefore, any improvements to the process of broadcasting can be immediately realized by higher-level MANET functionality and applications. While efficient broadcast protocols have been proposed, no single broadcasting protocol works well in all possible MANET conditions. Furthermore, protocols tend to fail catastrophically in severe network environments. Our three classes of adaptive protocols are pure machine learning, intra-protocol learning, and inter-protocol learning. In the pure machine learning approach, we exhibit a new approach to the design of a broadcast protocol: the decision of whether to rebroadcast a packet is cast as a classification problem. Each mobile node (MN builds a classifier and trains it on data collected from the network environment. Using intra-protocol learning, each MN consults a simple machine model for the optimal value of one of its free parameters. Lastly, in inter-protocol learning, MNs learn to switch between different broadcasting protocols based on network conditions. For each class of learning method, we create a prototypical protocol and examine its performance in simulation.

  8. Joint Downlink Scheduling and Radio Resource Allocation for User-Individual QoS in Adaptive OFDMA Wireless Communication Systems

    LU Yan-hui; YUAN Shu-chong; YIN Chang-chuan; YUE Guang-xin

    2006-01-01

    This paper proposes and analyzes a downlink multi-carrier proportional fair scheduler and an adaptive radio resource allocation algorithm combining the scheduler. This scheduler and algorithm are suitable for orthogonal frequency division multiple access wireless communication systems supporting multiple quality of service classes. Our results demonstrate that the scheduler and algorithm provide user-explicit fairness with user-individual quality of service guarantees, but the joint scheme achieves a higher sum-rate capacity with flexible parameter settings compared with the multi-carrier propartional fair scheduler.

  9. User Research and Game Analytics as a Combined Tool of Business Intelligence in Mobile Game Industry

    Büyükcan, Elif

    2014-01-01

    User studies are important sources of information for companies as they help the companies to understand the customers better when reaching them in many efficient ways. On the other hand, game analytics provide a good understanding about user behavior by making use of in-game statistics. Since both tools set up a good but different knowledge base, game companies can benefit from the combination of these two related information sources. Benefits which can be achieved from this cover gaining bu...

  10. An efficient contents-adaptive backlight control method for mobile devices

    Chen, Qiao Song; Yan, Ya Xing; Zhang, Xiao Mou; Cai, Hua; Deng, Xin; Wang, Jin

    2015-03-01

    For most of mobile devices with a large screen, image quality and power consumption are both of the major factors affecting the consumers' preference. Contents-adaptive backlight control (CABC) method can be utilized to adjust the backlight and promote the performance of mobile devices. Unlike the previous works mostly focusing on the reduction of power consumption, both of image quality and power consumption are taken into account in the proposed method. Firstly, region of interest (ROI) is detected to divide image into two parts: ROI and non-ROI. Then, three attributes including entropy, luminance, and saturation information in ROI are calculated. To achieve high perceived image quality in mobile devices, optimal value of backlight can be calculated by a linear combination of the aforementioned attributes. Coefficients of the linear combination are determined by applying the linear regression to the subjective scores of human visual experiments and objective values of the attributes. Based on the optimal value of backlight, displayed image data are processed brightly and backlight is darkened to reduce the power consumption of backlight later. Here, the ratios of increasing image data and decreasing backlight functionally depend on the luminance information of displayed image. Also, the proposed method is hardware implemented. Experimental results indicate that the proposed technique exhibits better performance compared to the conventional methods.

  11. Evaluation of in-network adaptation of scalable high efficiency video coding (SHVC) in mobile environments

    Nightingale, James; Wang, Qi; Grecos, Christos; Goma, Sergio

    2014-02-01

    High Efficiency Video Coding (HEVC), the latest video compression standard (also known as H.265), can deliver video streams of comparable quality to the current H.264 Advanced Video Coding (H.264/AVC) standard with a 50% reduction in bandwidth. Research into SHVC, the scalable extension to the HEVC standard, is still in its infancy. One important area for investigation is whether, given the greater compression ratio of HEVC (and SHVC), the loss of packets containing video content will have a greater impact on the quality of delivered video than is the case with H.264/AVC or its scalable extension H.264/SVC. In this work we empirically evaluate the layer-based, in-network adaptation of video streams encoded using SHVC in situations where dynamically changing bandwidths and datagram loss ratios require the real-time adaptation of video streams. Through the use of extensive experimentation, we establish a comprehensive set of benchmarks for SHVC-based highdefinition video streaming in loss prone network environments such as those commonly found in mobile networks. Among other results, we highlight that packet losses of only 1% can lead to a substantial reduction in PSNR of over 3dB and error propagation in over 130 pictures following the one in which the loss occurred. This work would be one of the earliest studies in this cutting-edge area that reports benchmark evaluation results for the effects of datagram loss on SHVC picture quality and offers empirical and analytical insights into SHVC adaptation to lossy, mobile networking conditions.

  12. There's not an app for that mobile user experience design for life

    Robinson, Simon; Jones, Matt

    2014-01-01

    There's Not an App for That will make your work stand out from the crowd. It walks you through mobile experiences, and teaches you to evaluate current UX approaches, enabling you to think outside of the screen and beyond the conventional. You'll review diverse aspects of mobile UX: the screens, the experience, how apps are used, and why they're used. You'll find special sections on ""challenging your approach"", as well as a series of questions you can use to critique and evaluate your own designs. Whether the authors are discussing real-world products in conjunction with suggested improvemen

  13. Multi-Layer 5G Mobile Phone Antenna for Multi-User MIMO Communications

    Ojaroudiparchin, Naser; Shen, Ming; Pedersen, Gert F.

    2015-01-01

    In this study, a new design of multi-layer phased array antenna for millimeter-wave (mm-Wave) fifth generation (5G) mobile terminals is proposed. The proposed linear phased array antenna is designed on four layers of the Rogers RT5880 substrates to operate at 28 GHz which is under consideration for 5G wireless communications. Two identical linear sub arrays can be simultaneously used at different sides of the mobile-phone printed circuit board (PCB) for operation in diversity or multiple-inpu...

  14. Effects Of Mobile Phones Radiation On The EEG And EMG Of Human Users

    Fathy El-Komey

    2005-09-01

    Full Text Available This study focuses on the effect of mobile phone radiation emissions on the human electroencephalograph (EEG and electromyogram activity (EMG. EEG and EMG recordings from 50 (male and female awake subjects were taken during exposure to radiation emissions from a mobile phone. Our results demonstrated that stimulation effects became apparent on EEG at first, and changes varied strongly at the end of the experiment to depression. EEG and EMG showed interesting changes.The results suggested that cellular phones may reversibly influence the human brain, as their use induced abnormal slow waves in EEG of awake persons.

  15. A Mobile Virtual Butler to Bridge the Gap between Users and Ambient Assisted Living: A Smart Home Case Study

    Nuno Costa

    2014-08-01

    Full Text Available Ambient Intelligence promises to transform current spaces into electronic environments that are responsive, assistive and sensitive to human presence. Those electronic environments will be fully populated with dozens, hundreds or even thousands of connected devices that share information and thus become intelligent. That massive wave of electronic devices will also invade everyday objects, turning them into smart entities, keeping their native features and characteristics while seamlessly promoting them to a new class of thinking and reasoning everyday objects. Although there are strong expectations that most of the users’ needs can be fulfilled without their intervention, there are still situations where interaction is required. This paper presents work being done in the field of human-computer interaction, focusing on smart home environments, while being a part of a larger project called Aging Inside a Smart Home. This initiative arose as a way to deal with a large scourge of our country, where lots of elderly persons live alone in their homes, often with limited or no physical mobility. The project relies on the mobile agent computing paradigm in order to create a Virtual Butler that provides the interface between the elderly and the smart home infrastructure. The Virtual Butler is receptive to user questions, answering them according to the context and knowledge of the AISH. It is also capable of interacting with the user whenever it senses that something has gone wrong, notifying next of kin and/or medical services, etc. The Virtual Butler is aware of the user location and moves to the computing device which is closest to the user, in order to be always present. Its avatar can also run in handheld devices keeping its main functionality in order to track user when s/he goes out. According to the evaluation carried out, the Virtual Butler is assessed as a very interesting and loved digital friend, filling the gap between the user and the

  16. Exploring Customer Specific KPI Selection Strategies for an Adaptive Time Critical User Interface

    Keck, Ingo; Ross, Robert

    2014-01-01

    Rapid growth in the number of measures available to describe customer-organization relationships has presented a serious challenge for Business Intelligence (BI) interface developers as they attempt to provide business users with key customer information without requiring users to painstakingly sift through many interface windows and layers. In this paper we introduce a prototype Intelligent User Interface that we have deployed to partially address this issue. The interface builds on machine ...

  17. Designing a meta-level architecture in Java for adaptive parallelism by mobile software agents

    Dominic, Stephen Victor

    Adaptive parallelism refers to a parallel computation that runs on a pool of processors that may join or withdraw from a running computation. In this dissertation, a functional system of agents and agent behaviors for adaptive parallelism is developed. Software agents have the properties of robustness and have capacity for fault-tolerance. Adaptation and fault-tolerance emerge from the interaction of self-directed autonomous software agents for a parallel computation application. The multi-agent system can be considered an object-oriented system with a higher-level architectural component, i.e., a meta level for agent behavior. The meta-level object architecture is based on patterns of behavior and communication for mobile agents, which are developed to support cooperative problem solving in a distributed-heterogeneous computing environment. Although parallel processing is a suggested application domain for mobile agents implemented in the Java language, the development of robust agent behaviors implemented in an efficient manner is an active research area. Performance characteristics for three versions of a pattern recognition problem are used to demonstrate a linear speed-up with efficiency that is compared to research using a traditional client-server protocol in the C language. The best ideas from existing approaches to adaptive parallelism are used to create a single general-purpose paradigm that overcomes problems associated with nodefailure, the use of a single-centralized or shared resource, requirements for clients to actively join a computation, and a variety of other limitations that are associated with existing systems. The multi-agent system, and experiments, show how adaptation and parallelism can be exploited by a meta-architecture for a distributed-scientific application that is of particular interest to design of signal-processing ground stations. To a large extent the framework separates concern for algorithmic design from concern for where and

  18. The effects of an adaptive directional BEAM microphone on the mismatch negativity responses of cochlear implant users in noise

    ERDOĞAN*, Asuman; Akdaş, Ferda

    2013-01-01

    To investigate the effects of noise on mismatch negativity (MMN) responses and the possible benefits of an adaptive directional BEAM microphone in noise during MMN recordings, and to compare the cochlear implant-evoked potential results with normal hearing subjects. Materials and methods: /da/ and /di/ speech stimuli were used to elicit MMN responses in 11 Freedom cochlear implant users and in 11 normal hearing subjects. Speech noise was delivered at 80 dB sound pressure level (-10 dB signa...

  19. A Modified User-Oriented Heuristic Evaluation of a Mobile Health System for Diabetes Self-management Support.

    Georgsson, Mattias; Staggers, Nancy; Weir, Charlene

    2016-02-01

    Mobile health platforms offer significant opportunities for improving diabetic self-care, but only if adequate usability exists. Expert evaluations such as heuristic evaluation can provide distinct usability information about systems. The purpose of this study was to complete a usability evaluation of a mobile health system for diabetes patients using a modified heuristic evaluation technique of (1) dual-domain experts (healthcare professionals, usability experts), (2) validated scenarios and user tasks related to patients' self-care, and (3) in-depth severity factor ratings. Experts identified 129 usability problems with 274 heuristic violations for the system. The categories Consistency and Standards dominated at 24.1% (n = 66), followed by Match Between System and Real World at 22.3% (n = 61). Average severity ratings across system views were 2.8 (of 4), with 9.3% (n = 12) rated as catastrophic and 53.5% (n = 69) as major. The large volume of violations with severe ratings indicated clear priorities for redesign. The modified heuristic approach allowed evaluators to identify unique and important issues, including ones related to self-management and patient safety. This article provides a template for one type of expert evaluation adding to the informaticists' toolbox when needing to conduct a fast, resource-efficient and user-oriented heuristic evaluation. PMID:26657618

  20. Adaptive resource allocation scheme using sliding window subchannel gain computation: context of OFDMA wireless mobiles systems

    Multiuser diversity combined with Orthogonal Frequency Division Multiple Access (OFDMA) are a promising technique for achieving high downlink capacities in new generation of cellular and wireless network systems. The total capacity of OFDMA based-system is maximized when each subchannel is assigned to the mobile station with the best channel to noise ratio for that subchannel with power is uniformly distributed between all subchannels. A contiguous method for subchannel construction is adopted in IEEE 802.16 m standard in order to reduce OFDMA system complexity. In this context, new subchannel gain computation method, can contribute, jointly with optimal assignment subchannel to maximize total system capacity. In this paper, two new methods have been proposed in order to achieve a better trade-off between fairness and efficiency use of resources. Numerical results show that proposed algorithms provide low complexity, higher total system capacity and fairness among users compared to others recent methods.

  1. User Acceptance of Mobile Knowledge Management Learning System: Design and Analysis

    Chen, Hong-Ren; Huang, Hui-Ling

    2010-01-01

    Thanks to advanced developments in wireless technology, learners can now utilize digital learning websites at anytime and anywhere. Mobile learning captures more and more attention in the wave of digital learning. Evolving use of knowledge management plays an important role to enhance problem solving skills. Recently, innovative approaches for…

  2. Influence of mobile map size and user capacities on situation awareness tested in a virtual environment

    Smets, N.J.J.M.; Brake, G.M. te; Lindenberg, J.; Neerincx, M.A.

    2007-01-01

    In the near future, first responders may become equipped with mobile devices providing navigation, decision and communication support. Because of the complex and chaotic circumstances in which these devices will be used, the devices should support the creation and maintenance of adequate situation a

  3. Pursuing the Anonymous User: Privacy Rights and Mandatory Registration of Prepaid Mobile Phones

    Gow, Gordon A.; Parisi, Jennifer

    2008-01-01

    In recent years there has been concern among law enforcement and national security organizations about the use of "anonymous" prepaid mobile phone service and its purported role in supporting criminal and terrorist activities. As a result, a number of countries have implemented registration requirements for such service. Privacy rights advocates…

  4. User Influence on the Mean Effective Gain for Data Mode Operation of Mobile Handsets

    Nielsen, Jesper Ødum; Yanakiev, Boyan Radkov; Bonev, Ivan Bonev;

    2012-01-01

    The current paper presents statistics on the mean effective gain (MEG) for mobile handsets. The results are based on a large measurement campaign in an urban environment where the propagation channel from two different base stations to seven different handsets were measured in two bands (776 MHz ...

  5. Mean Effective Gain for Data Mode Operation of Mobile Handsets with Users

    Nielsen, Jesper Ødum; Yanakiev, Boyan; Bonev, Ivan Bonev;

    2010-01-01

    The current paper presents statistics on the mean effective gain (MEG) for mobile handsets. The results are based on a large measurement campaign in an urban environment where the propagation channel from two different base sta- tions to seven different handsets were measured in two bands (776 MH...

  6. Evaluating user preferences for video transfer methods from a mobile device to a TV screen

    Fleury, Alexandre; Pedersen, Jakob Schou; Larsen, Lars Bo

    2013-01-01

    This article reports on the evaluation of four methods for transferring video content from a mobile device to a fixed television. The methods have been investigated in a Wizard-of-Oz approach through two consecutive studies. The first experiment aimed at collecting general opinions toward such a ...

  7. Climate change, adaptation strategies and mobility: evidence from four settlements in Senegal

    Sall, Mohamadou [Universite Cheikh Anta Diop de Dakar (Senegal); Tall, Serigne Mansour [ONU-Habitat (UN); Tandian, Aly [Universite Gaston Berger de Saint-Louis (Senegal); Samb, Al Assane

    2011-11-15

    This research investigates the impact of climate change on the mobility of people in four settlements in Senegal: Ngueye Ngueye, Gandiole, the Senegal River delta and Ourossogui. A qualitative approach involving semi-structured interviews and focus groups was used to determine how daily life in these communities is being affected by environmental change. Some migrants spend long periods as far afield as Mauritania, the Gambia or Spain, while others stay closer to home, going to places like Saint-Louis, Dakar and Mbour for short periods. Mobility is an opportunity for migrants to generate funds and send money home. It is a key factor in adaptation to climate change, as a strategy for survival and for diversifying incomes. The problems encountered in the ecological study zones are not entirely due to climate change, for migration is also triggered by factors such as the opening of the breach in Saint-Louis or lack of support for rural development. However, climate change is certainly accelerating disruptions and transformations in the study sites. Moreover, while migrants' financial transfers help improve daily life for some families, they also increase socio-economic inequalities between households that include migrants and those that do not. People are moving away from (but not necessarily abandoning) purely agricultural livelihoods and seeking to diversify their sources of income. This may come from migration, or from artisanal activities undertaken in the locality - such as metalwork, woodwork, sewing or hairdressing. Another option that many women have taken is using micro-credit facilities to start processing local produce, crushing groundnuts and preparing cereals to sell at the weekly markets. Other adaptation strategies are developed and adopted through technical innovations or awareness-raising and educational activities. These activities often require institutional support from the State or from NGOs involved in implementing projects and helping

  8. Leakiness and Creepiness in App Space: User Perceptions of Privacy and Mobile App Use

    Shklovski, Irina; Mainwaring, Scott; Skúladóttir, Halla Hrund;

    2014-01-01

    confronted with app behaviors and their reactions assessed. Users felt their personal space had been violated in “creepy” ways. Using Altman’s notions of personal space and territoriality, and Nissenbaum’s theory of contextual integrity, we account for these emotional reactions and sug- gest that they point...

  9. A User-Driven and Data-Driven Approach for Supporting Teachers in Reflection and Adaptation of Adaptive Tutorials

    Ben-Naim, Dror; Bain, Michael; Marcus, Nadine

    2009-01-01

    It has been recognized that in order to drive Intelligent Tutoring Systems (ITSs) into mainstream use by the teaching community, it is essential to support teachers through the entire ITS process: Design, Development, Deployment, Reflection and Adaptation. Although research has been done on supporting teachers through design to deployment of ITSs,…

  10. Mobile-supported life charting for bipolar patients - user requirements study.

    Andersen, Per-Øivin Berg; Babic, Ankica

    2013-01-01

    It is assumed that bipolar disorder patients can benefit from monitoring their mood, sleep, medicine intake and behavior which could be both done by patients themselves and in cooperation with health care professionals. This study aims at understanding what is required from a computerized system, as seen from the view of therapists and the patients, and how the newer mobile technologies (smart phones and tablets) can be utilized to support development of such a system. The study focuses on several existing solutions available either freely or on the market. Then these solutions are evaluated by both patients and medical professionals as a part of the system requirements study to be used in a new system development that will utilize mobile technologies to support the performance and patient outcomes. PMID:23920885

  11. The Influence of Service Recovery Strategies on Word Of Mouth: Views of Mobile Phone Users

    Samsudin Wahab; Nor Sabrena Norizan

    2012-01-01

    This study explores the relationship between perceived customer dimensions of justice and word of mouth among the selected university students in mobile phone usage. The respondent used for this study was 500 business students of Malaysian university students located in Kelang Valley. Out of 327 questionnaires distributed, there were 181 complainants. Dimensions of justice act as an independent variable consisted of procedural, interactional and distributional justice. In order to determine t...

  12. Adaptive and Secure Routing Protocol for Emergency Mobile Ad Hoc Networks

    Panaousis, Emmanouil A; Millar, Grant P; Politis, Christos; 10.5121/ijwmn.2010.2205

    2010-01-01

    The nature of Mobile Ad hoc NETworks (MANETs) makes them suitable to be utilized in the context of an extreme emergency for all involved rescue teams. We use the term emergency MANETs (eMANETs) in order to describe next generation IP-based networks, which are deployed in emergency cases such as forest fires and terrorist attacks. The main goal within the realm of eMANETs is to provide emergency workers with intelligent devices such as smart phones and PDAs. This technology allows communication "islets" to be established between the members of the same or different emergency teams (policemen, firemen, paramedics). In this article, we discuss an adaptive and secure routing protocol developed for the purposes of eMANETs. We evaluate the performance of the protocol by comparing it with other widely used routing protocols for MANETs. We finally show that the overhead introduced due to security considerations is affordable to support secure ad-hoc communications among lightweight devices.

  13. Adaptation of Gabor filters for simulation of human preattentive mechanism for a mobile robot

    Kulkarni, Naren; Naghdy, Golshah A.

    1993-08-01

    Vision guided mobile robot navigation is complex and requires analysis of tremendous amounts of information in real time. In order to simplify the task and reduce the amount of information, human preattentive mechanism can be adapted [Nag90]. During the preattentive search the scene is analyzed rapidly but in sufficient detail for the attention to be focused on the `area of interest.' The `area of interest' can further be scrutinized in more detail for recognition purposes. This `area of interest' can be a text message to facilitate navigation. Gabor filters and an automated turning mechanism are used to isolate the `area of interest.' These regions are subsequently processed with optimal spatial resolution for perception tasks. This method has clear advantages over the global operators in that, after an initial search, it scans each region of interest with optimum resolution. This reduces the volume of information for recognition stages and ensures that no region is over or under estimated.

  14. Adaptive and Secure Routing Protocol for Emergency Mobile Ad Hoc Networks

    Emmanouil A. Panaousis

    2010-05-01

    Full Text Available The nature of Mobile Ad hoc NETworks (MANETs makes them suitable to be utilized in the context of anextreme emergency for all involved rescue teams. We use the term emergency MANETs (eMANETs inorder to describe next generation IP-based networks, which are deployed in emergency cases such asforest fires and terrorist attacks. The main goal within the realm of eMANETs is to provide emergencyworkers with intelligent devices such as smart phones and PDAs. This technology allows communication”islets” to be established between the members of the same or different emergency teams (policemen,firemen, paramedics. In this article, we discuss an adaptive and secure routing protocol developed forthe purposes of eMANETs. We evaluate the performance of the protocol by comparing it with otherwidely used routing protocols for MANETs. We finally show that the overhead introduced due to securityconsiderations is affordable to support secure ad-hoc communications among lightweight devices.

  15. Radio frequency exposure in mobile phone users: Implications for exposure assessment in epidemiological studies

    The majority of epidemiological studies investigating correlations between long-term low-level radiofrequency (RF) exposure from mobile phones and health endpoints have followed a case-control design, requiring reconstruction of individual RF exposure. To date, these have employed 'time of use' as an exposure surrogate from questionnaire information or billing records. The present study demonstrates such an approach may not account for variability in mobile phone transmit power, which can be roughly correlated with RF exposure. This variability exists (a) during a single call, (b) between separate calls, (c) between averaged values from individuals within a local study group and (d) between average values from groups in different geographical locations. The present data also suggest an age-related influence on talk time, as well as significant inaccuracy (45-60%) in recalling 'time of use'. Evolving technology and changing use behaviours may add additional complexities. Collectively, these data suggest efforts to identify dose response and statistical correlations between mobile phone use and subtle health endpoints may be significantly challenged. (authors)

  16. Multi-Layer 5G Mobile Phone Antenna for Multi-User MIMO Communications

    Ojaroudiparchin, Naser; Shen, Ming; Pedersen, Gert F.

    2015-01-01

    In this study, a new design of multi-layer phased array antenna for millimeter-wave (mm-Wave) fifth generation (5G) mobile terminals is proposed. The proposed linear phased array antenna is designed on four layers of the Rogers RT5880 substrates to operate at 28 GHz which is under consideration for...... 5G wireless communications. Two identical linear sub arrays can be simultaneously used at different sides of the mobile-phone printed circuit board (PCB) for operation in diversity or multiple-input multiple-output (MIMO) modes. Each sub array contains eight elements of very compact off......-center dipole antennas with dimensions of 5.4×0.67 mm2. The feature of compact design with good beam-steering function makes them well-suited to integrate into the mobile-phone mock-up. The fundamental properties of the proposed antenna have been investigated. Simulations show that the proposed 5G antenna is...

  17. An Optimized Player Taxonomy Model for Mobile MMORPGs with Millions of Users

    Fang You

    2011-01-01

    Full Text Available Massively multiplayer online role-playing games (MMORPGs have great potential as sites for research within the social and human-computer interaction. In the MMORPGs, a stability player taxonomy model is very important for game design. It helps to balance different types of players and improve business strategy of the game. The players in mobile MMORPGs are also connected with social networks; many studies only use the player's own attributes statistics or questionnaire survey method to predict player taxonomy, so lots of social network relations' information will be lost. In this paper, by analyzing the impacts of player's social network, commercial operating data from mobile MMORPGs is used to establish our player taxonomy model (SN model. From the model results, social network-related information in mobile MMORPGs will be considered as important factors to pose this optimized player taxonomy model. As experimental results showed, compared with another player taxonomy model (RA model, our proposed player taxonomy model can achieve good results: classification is more stable.

  18. An Adaptive Fuzzy System in Large Scale Mobile Ad Hoc Networks

    B.G.Obulla Reddy

    2012-04-01

    Full Text Available Multicast protocols in MANETs must consider control overhead for maintenance, energy efficiency of nodes and routing trees managements to frequent changes of network topology. Now-adaysMulticast protocols extended with Cluster based approach. Cluster based multicast tree formation is still research issues. The tree reconstruction of cluster-based multicast routing protocol will take place if any link of the trees has malfunction or the nodes move out of the link, therefore, its robust performance is unsatisfactory. The mobility of nodes will always increase the communication delay because of re-clustering and cluster head selections. For this issue we proposed the new scheme Adaptive Fuzzy System (AFS, its fuzzy based clustering and predicting the next cluster head (CH based their location updates with clustered group. A new location management scheme is proposed to handle the mobility of cluster members, based on a hybrid strategy that includes location updating and location prediction. In a clustered zone predicts movement of members and CH based on Kalman filtering of previously received updates and based on location updates CH will selected. Here location managements will leads to reduce cluster head selections. We used ns2 for our AFS.We present simulation results that demonstrate a significant reduce the communication delay over the traditional cluster based MANETs deployments.

  19. Application of Multiple Description Coding for Adaptive QoS Mechanism for Mobile Cloud Computing

    Ilan Sadeh

    2014-02-01

    Full Text Available Multimedia transmission over cloud infrastructure is a hot research topic worldwide. It is very strongly related to video streaming, VoIP, mobile networks, and computer networks. The goal is a reliable integration of telephony, video and audio transmission, computing and broadband transmission based on cloud computing. One right approach to pave the way for mobile multimedia and cloud computing is Multiple Description Coding (MDC, i.e. the solution would be: TCP/IP and similar protocols to be used for transmission of text files, and Multiple Description Coding “Send and Forget” algorithm to be used as transmission method for Multimedia over the cloud. Multiple Description Coding would improve the Quality of Service and would provide new service of rate adaptive streaming. This paper presents a new approach for improving the quality of multimedia and other services in the cloud, by using Multiple Description Coding (MDC. Firsty MDC Send and Forget Algorithm is compared with the existing protocols such as TCP/IP, UDP, RTP, etc. Then the Achievable Rate Region for MDC system is evaluated. Finally, a new subset of Quality of Service that considers the blocking in multi-terminal multimedia network and fidelity losses is considered.

  20. Mobile visualization of architectural projects: Quality and emotional evaluation based on user experience

    Fonseca Escudero, David; Redondo Domínguez, Ernesto; Navarro Delgado, Isidro; Pifarré, Marc; Villegas, Eva

    2011-01-01

    The visualization of architectural design has always been associated with physical models, exhibition panels and displays on computer screens, usually in a large format. However, technological developments in the past decades have produced new devices such as handheld PCs, pocket PCs, and Smartphones that have increasingly larger screens and more sophisticated technical characteristics. The emergence of these devices has made both the non expert and advanced user a consumer of such devices. T...

  1. Flow-level performance and capacity of wireless networks with user mobility

    Bonald, Thomas; Borst, Sem; Hegde, Nidhi; Jonckheere, Matthieu; Proutière, Alexandre

    2009-01-01

    The performance evaluation of wireless networks is severely complicated by the specific features of radio communication, such as highly variable channel conditions, interference issues, and possible hand-offs among base stations. The latter elements have no natural counterparts in wireline scenarios, and create a need for novel performance models that account for the impact of these characteristics on the service rates of users. Motivated by the above issues, we review several models for char...

  2. Mobile Based User-Centered Learning Environment for Adult Absolute Illiterates

    Inayat ur-Rehman; Azra Shamim; Tamim Ahmed Khan; Manzoor Elahi; Sajjad Mohsin

    2016-01-01

    Education plays a vital role in the success of any community. Countries with increased literacy rate have improved their status on the world map. In recent years, the use of e-learning methodologies has been significant. However, majority of the previous methodologies are focused on the formal education or toddlers. The technoliteracy solutions for children are not suitable for adults and those designed specifically for adults are text dominant and require the users of these applications to b...

  3. User-centered applications: Use of mobile information technologies to promote sustainable school healthcare services

    Alida Veldsman

    2015-07-01

    Full Text Available The youth, especially school going children, are the future of any society. It is therefore important that children should receive adequate healthcare support at an early age in order to strive to preserve and ensure better education and welfare of the children and continuity in societal success. Despite the strategic initiatives that aim at improving the general health of school going children, such as South Africa’s Integrated School Health Policy, there still exist challenges in support programmes meant to alleviate the barriers to effective healthcare towards improved education for the school children. Advances in ICT enable a fundamental redesign of healthcare processes based on the use and integration of electronic communication at all levels. New communication technologies can support a transition from institution centric to user-centric applications. This paper defines key principles and challenges for designers, policy makers, and evaluators of user-centred technologies for healthcare in schools. The paper employs the User Experience Management Model (UXM2 to review the current and emerging trends, and highlights challenges related to the design of a typical m-ICT application that supports delivery of healthcare in schools. The paper reaches conclusions for next steps that will advance the domain.

  4. Characterization of User-Perceived Quality of Service (QOS in Mobile Devices Using Network Pairwise Comparisons

    Carlos E. Otero

    2010-08-01

    Full Text Available This paper presents a user-centric and application-specific QoS assessment methodology for cellularcommunication networks. Specifically, it uses the Analytic Hierarchy Process (AHP to evaluate QoS as amulti-criteria decision problem that represents how well cellular networks’ data services are perceivedgiven particular sets of application classes and relative to other networks servicing in the same area. Aspart of the methodology, drive testing is performed to collect objective measurements associated withidentified QoS criteria for data services. Once drive testing is performed and data collected, multiplenetworks are compared to determine the network that provides higher QoS based on users’ perception ofquality. The selection of the best performing network is based on the output provided by the AHPapproach, which is used as unified measurement of the perceived QoS by users on different networks. Inorder to determine application-specific priorities, the approach presented uses three different applicationclasses, including Emergency, Business, and Personal. For each class, the relative importance of eachquality evaluation criteria is adjusted in the AHP procedure to reflect the priorities of the servicesexpected. Through several case studies, the approach is proven successful in providing a way foranalyzing user-centric QoS for application-specific scenarios.

  5. Translation and Cross-Cultural Adaptation of the Danish Version: Wheelchair Users Shoulder Pain Index (WUSPI)

    Larsen, Camilla Marie; Bruun, Poul; S Hansen, Sabrina;

    2015-01-01

    Centre, University College Lillebaelt, Denmark. 3Institute of Occupational Therapy, Physiotherapy and Radiography, Bergen University College, Bergen, Norway Introduction The Wheelchair Users Shoulder Pain Index (WUSPI) is a self-report questionnaire designed to assess shoulder pain in wheelchair users...... interviewing of eleven participants (26-63 years, n=1 woman) with SCI. Results The translation processes revealed minor discrepancies concerning wording and understanding in few items. After minor revision the expert committee agreed on a preliminary version for cognitive interviewing. The questionnaire...

  6. A Threshold-Adaptive Reputation System on Mobile Ad Hoc Networks

    Tsai, Hsiao-Chien; Lo, Nai-Wei; Wu, Tzong-Chen

    In recent years huge potential benefits from novel applications in mobile ad hoc networks (MANET) have been discussed extensively. However, without robust security mechanisms and systems to provide safety shell through the MANET infrastructure, MANET applications can be vulnerable and hammered by malicious attackers easily. In order to detect misbehaved message routing and identify malicious attackers in MANET, schemes based on reputation concept have shown their advantages in this area in terms of good scalability and simple threshold-based detection strategy. We observed that previous reputation schemes generally use predefined thresholds which do not take into account the effect of behavior dynamics between nodes in a period of time. In this paper, we propose a Threshold-Adaptive Reputation System (TARS) to overcome the shortcomings of static threshold strategy and improve the overall MANET performance under misbehaved routing attack. A fuzzy-based inference engine is introduced to evaluate the trustiness of a node's one-hop neighbors. Malicious nodes whose trust values are lower than the adaptive threshold, will be detected and filtered out by their honest neighbors during trustiness evaluation process. The results of network simulation show that the TARS outperforms other compared schemes under security attacks in most cases and at the same time reduces the decrease of total packet delivery ratio by 67% in comparison with MANET without reputation system.

  7. User Behaviour Before Mobile Phone Disposal and Recycling in the State of São Paulo

    Koga, Guilherme Akio; Maccari, Emerson Antonio; Kniess, Claudia Terezinha; Ruiz, Mauro Silva

    2014-01-01

    Given the privatization of the Telebras system in 1998 and the constant development of new technologies, mobile phone consumption picked up in the form of a craze in Brazil to the extent of in 2010 mile stoning 100% density, i.e., more than 190 million units were then in use within the domestic market. On the other hand, it seems appropriate to wonder what happens to this equipment once their lifecycle ends. Sheltered by this context, the prime purpose of this study is not only to evaluate us...

  8. X-Learn: An XML-Based, Multi-agent System for Supporting "User-Device" Adaptive E-learning

    De Meo, P; Terracina, G; Ursino, D

    2009-01-01

    In this paper we present X-Learn, an XML-based, multi-agent system for supporting "user-device" adaptive e-learning. X-Learn is characterized by the following features: (i) it is highly subjective, since it handles quite a rich and detailed user profile that plays a key role during the learning activities; (ii) it is dynamic and flexible, i.e., it is capable of reacting to variations of exigencies and objectives; (iii) it is device-adaptive, since it decides the learning objects to present to the user on the basis of the device she/he is currently exploiting; (iv) it is generic, i.e., it is capable of operating in a large variety of learning contexts; (v) it is XML based, since it exploits many facilities of XML technology for handling and exchanging information connected to e-learning activities. The paper reports also various experimental results as well as a comparison between X-Learn and other related e-learning management systems already presented in the literature.

  9. User Intentions to Adopt Mobile Payment Services: A Study of Early Adopters in Thailand

    CHANCHAI PHONTHANUKITITHAWORN

    2015-04-01

    Full Text Available The adoption and use of M-payment services has become critical for entities involved in the mobile commerce industry in Asian countries. This paper reports on research that investigated the factors affecting consumer intentions to adopt mobile payment (Mpayment services in Thailand. The study developed a model based on an extended version of the technology acceptance model (TAM that was modified using constructs that were explained in terms of Hofstede’s cultural dimensions allowing the findings to be reported in context using the Thai national setting. Arguably, the alignment of cultural dimensions with the extended TAM constructs is one that distinguishes the contribution of the paper from previous studies. Responses from 256 early adopters of M-payment services were empirically analyzed using structural equation modelling (SEM to test a set of research hypotheses. The results indicate that consumer adoption of M-payment services in Thailand was determined by four factors—compatibility, subjective norm, perceived trust, and perceived cost. Surprisingly, the construct of perceived risk and the two major TAM constructs—perceived usefulness (PU and perceived ease of use (PEOU were found not to have a direct effect on behavioral intention.

  10. Experience with technology dynamics of user experience with mobile media devices

    al-Azzawi, Ali

    2013-01-01

    With a focus on gaining an empirically derived understanding of the underlying psychological dimensions and processes behind people’s experiences with technology, this book contributes to the debate of user experience (UX) within several disciplines, including HCI, design and marketing. It analyses UX dynamics at various time scales, and explores the very nature of time and meaning in the context of UX.Experience with Technology uses personal construct theory (PCT) as a theoretical and methodological starting point to this project. Major case-studies are described that examine people’s exp

  11. Computer Assisted Language Learning towards 2010 : Mobile Learning, User generated Content and Convergence

    Drabløs, Lars Are Holth

    2008-01-01

    Many topics have been touched in this thesis. I would like to conclude with some answers to the questions raised in the initial problem description and point out further challenges in some cases. We have seen that there exist several approaches for CALL, with virtual learning communities as one example. The community presented here, moodle.org, is an open source framework and let any user register for free and manage a course. In that way may this framework be used by school institutions, pro...

  12. A Location-based Mobile Service utilizing Anonymous Indoor User Location Data : An Empirical Study

    Tran, Hoang Thanh; Thingstad, Trond

    2014-01-01

    In recent years, navigation and location-based services have automatically been integrated into people's lives. The prevalence of devices with GPS-capabilities have exploded since the first device for end-users was presented, and most new smart phones have GPS and Wi-Fi capabilities. New fields such as outdoor and indoor location-based services have come from these opportunities. One area that has not been thoroughly researched is the usage of anonymous location data from indoor position...

  13. The Development of an ICF-Oriented, Adaptive Physician Assessment Instrument of Mobility, Self-care, and Domestic Life

    Farin, Erik; Fleitz, Annette

    2009-01-01

    The objective of this study was development and psychometric testing of an adaptive, International Classification of Functioning, Disability, and Health (ICF)-oriented questionnaire to be processed by the rehabilitation physician that aids in assessing mobility, self-care, and domestic life (Moses-Physician). The intent is to develop a physician…

  14. Reducing interferences in wireless communication systems by mobile agents with recurrent neural networks-based adaptive channel equalization

    Beritelli, Francesco; Capizzi, Giacomo; Lo Sciuto, Grazia; Napoli, Christian; Tramontana, Emiliano; Woźniak, Marcin

    2015-09-01

    Solving channel equalization problem in communication systems is based on adaptive filtering algorithms. Today, Mobile Agents (MAs) with Recurrent Neural Networks (RNNs) can be also adopted for effective interference reduction in modern wireless communication systems (WCSs). In this paper MAs with RNNs are proposed as novel computing algorithms for reducing interferences in WCSs performing an adaptive channel equalization. The method to provide it is so called MAs-RNNs. We perform the implementation of this new paradigm for interferences reduction. Simulations results and evaluations demonstrates the effectiveness of this approach and as better transmission performance in wireless communication network can be achieved by using the MAs-RNNs based adaptive filtering algorithm.

  15. User-centered Service Design for Sustainable Mobility Innovations : Mapping Users’ Needs and Service Requirements for Electric Car Sharing Service Design

    Sopjani, Liridona

    2015-01-01

    Electric car sharing is gradually expanding as an innovative and more sustainable mobility alternative to private cars. Though, the use of such mobility service has not yet reached the desired levels worldwide despite attracting large number of customers. For car sharing operators, thus, it is imperative to understand the users and their needs beyond the existing demographics and quantitative data in order to design more desirable and useful services that expand customer acceptance and usage ...

  16. 基于云计算的移动互联网大数据用户行为分析引擎设计%Design of Mobile Internet Big Data User Behavior Analysis Engine Based on Cloud Computing

    陶彩霞; 谢晓军; 陈康; 郭利荣; 刘春

    2013-01-01

    随着移动互联网的迅速发展,运营商面临的竞争日益激烈,流量经营势在必行,基于用户行为分析的精确营销是重要手段.但在大数据时代,随着移动互联网业务和用户数量的快速增长,传统的架构难以适应海量数据挖掘的要求.本文提出了一种基于云计算的移动互联网大数据用户行为分析引擎解决方案,包括系统总体架构设计、大数据入库与预处理组件、大数据用户行为分析模型等关键模块的设计,最后分析了系统测试效果.%Along with the rapid development of mobile internet, telecom operators face an increasingly competition. So traffic operations are imperative for telecom operators, and precise marketing based on user behavior analysis is an important means. But in the era of big data, with the rapid growth of the mobile internet service and the number of users, the traditional architecture is difficult to adapt to the requirements of mass data mining. A design of mobile internet big data user behavior analysis engine based on cloud computing was provided, including the overall system architecture design solution, the big data loading components and the big data user behavior analysis model components. Additionally, the test results of system performance were analyzed.

  17. Reliability of dynamic sitting balance tests and their correlations with functional mobility for wheelchair users with chronic spinal cord injury

    Kelly L. Gao

    2015-01-01

    Full Text Available The purpose of this study is to develop a reliable and valid tool for measuring the dynamic sitting balance of wheelchair users with spinal cord injury. The balance tests were performed in nine patients with chronic spinal cord injury (average of 17.2 years postinjury between levels C6 and L1, while they were sitting in their wheelchairs and on a standardized stool (unsupported sitting, twice, 7 days apart. Limits of stability (LOS and sequential weight shifting (SWS were designed in this study. The balance tests measured participants' volitional weight shifting in multiple directions within their base of support. Their mobility scores on the Spinal Cord Independence Measure III were correlated with the balance test results. The LOS results showed moderate to excellent test–retest reliability (intraclass correlation coefficients ranged from 0.673 to 0.990 for both the wheelchair and the unsupported sitting. The SWS results showed moderate to excellent reliability (intraclass correlation coefficients ranged from 0.688 to 0.952. The LOS results correlated significantly with the Spinal Cord Independence Measure III mobility scores only in case of unsupported sitting, but the SWS test results showed significant correlations in both sitting conditions. To sum up, the sitting LOS and SWS tests are reliable and valid tools for assessing the dynamic sitting balance control of patients with spinal cord injury.

  18. Mobile Health Apps to Facilitate Self-Care: A Qualitative Study of User Experiences.

    Kevin Anderson

    Full Text Available Consumers are living longer, creating more pressure on the health system and increasing their requirement for self-care of chronic conditions. Despite rapidly-increasing numbers of mobile health applications ('apps' for consumers' self-care, there is a paucity of research into consumer engagement with electronic self-monitoring. This paper presents a qualitative exploration of how health consumers use apps for health monitoring, their perceived benefits from use of health apps, and suggestions for improvement of health apps.'Health app' was defined as any commercially-available health or fitness app with capacity for self-monitoring. English-speaking consumers aged 18 years and older using any health app for self-monitoring were recruited for interview from the metropolitan area of Perth, Australia. The semi-structured interview guide comprised questions based on the Technology Acceptance Model, Health Information Technology Acceptance Model, and the Mobile Application Rating Scale, and is the only study to do so. These models also facilitated deductive thematic analysis of interview transcripts. Implicit and explicit responses not aligned to these models were analyzed inductively.Twenty-two consumers (15 female, seven male participated, 13 of whom were aged 26-35 years. Eighteen participants reported on apps used on iPhones. Apps were used to monitor diabetes, asthma, depression, celiac disease, blood pressure, chronic migraine, pain management, menstrual cycle irregularity, and fitness. Most were used approximately weekly for several minutes per session, and prior to meeting initial milestones, with significantly decreased usage thereafter. Deductive and inductive thematic analysis reduced the data to four dominant themes: engagement in use of the app; technical functionality of the app; ease of use and design features; and management of consumers' data.The semi-structured interviews provided insight into usage, benefits and challenges of

  19. Using Social Networking to Understand Social Networks: Analysis of a Mobile Phone Closed User Group Used by a Ghanaian Health Team

    Kaonga, Nadi Nina; Labrique, Alain; Mechael, Patricia; Akosah, Eric; Ohemeng-Dapaah, Seth; Sakyi Baah, Joseph; Kodie, Richmond; Kanter, Andrew S.; Levine, Orin

    2013-01-01

    Background The network structure of an organization influences how well or poorly an organization communicates and manages its resources. In the Millennium Villages Project site in Bonsaaso, Ghana, a mobile phone closed user group has been introduced for use by the Bonsaaso Millennium Villages Project Health Team and other key individuals. No assessment on the benefits or barriers of the use of the closed user group had been carried out. Objective The purpose of this research was to make the ...

  20. Weather effects on the patterns of people's everyday activities: a study using GPS traces of mobile phone users.

    Horanont, Teerayut; Phithakkitnukoon, Santi; Leong, Tuck W; Sekimoto, Yoshihide; Shibasaki, Ryosuke

    2013-01-01

    This study explores the effects that the weather has on people's everyday activity patterns. Temperature, rainfall, and wind speed were used as weather parameters. People's daily activity patterns were inferred, such as place visited, the time this took place, the duration of the visit, based on the GPS location traces of their mobile phones overlaid upon Yellow Pages information. Our analysis of 31,855 mobile phone users allowed us to infer that people were more likely to stay longer at eateries or food outlets, and (to a lesser degree) at retail or shopping areas when the weather is very cold or when conditions are calm (non-windy). When compared to people's regular activity patterns, certain weather conditions affected people's movements and activities noticeably at different times of the day. On cold days, people's activities were found to be more diverse especially after 10AM, showing greatest variations between 2PM and 6PM. A similar trend is observed between 10AM and midnight on rainy days, with people's activities found to be most diverse on days with heaviest rainfalls or on days when the wind speed was stronger than 4 km/h, especially between 10AM-1AM. Finally, we observed that different geographical areas of a large metropolis were impacted differently by the weather. Using data of urban infrastructure to characterize areas, we found strong correlations between weather conditions upon people's accessibility to trains. This study sheds new light on the influence of weather conditions on human behavior, in particular the choice of daily activities and how mobile phone data can be used to investigate the influence of environmental factors on urban dynamics. PMID:24367481

  1. An Enhanced Profile Management System to Support Adaptability

    Chen Ting; Yang Yun

    2008-01-01

    An integrated management architecture which called Adaptive Agent and Profile Management System (AAPMS) was proposed here. Using this system, users can get an adaptive service list according to their current condition (terminal capability, user preference, etc.). After choosing a service, the users only need to download a simple service agent to their mobile device and install it, and then the service agent will connect to the corresponding service provider. The users and the service providers can also manage their profiles using AAPMS.

  2. Web user interaction : a declarative approach based on XForms

    Honkala, Mikko

    2007-01-01

    This thesis studies next-generation web user interaction definition languages, as well as browser software architectures. The motivation comes from new end-user requirements for web applications: demand for higher interaction, adaptation for mobile and multimodal usage, and rich multimedia content. At the same time, there is a requirement for non-programmers to be able to author, customize, and maintain web user interfaces. Current user interface tools do not support well these new kinds ...

  3. A User-Centric Adaptive Learning System for E-Learning 2.0

    Huang, Shiu-Li; Shiu, Jung-Hung

    2012-01-01

    The success of Web 2.0 inspires e-learning to evolve into e-learning 2.0, which exploits collective intelligence to achieve user-centric learning. However, searching for suitable learning paths and content for achieving a learning goal is time consuming and troublesome on e-learning 2.0 platforms. Therefore, introducing formal learning in these…

  4. Investigation of methods for user adapted visualisation of information in a hypermedia generation system

    Werner, J.

    2005-01-01

    A literature review of user interaction to support creative processes is given. A design for an authoring system for semi-automatically generated hypermedia presentations is developed. The system designed is called SampLe (a Semi-Automatic Multimedia Presentation generation Environment)

  5. The Exploration of APP Design based on Mobile User Experience%基于移动用户体验的 APP 设计

    陆远蓉

    2014-01-01

    The future Internet would be the mobile one centerd round mobile network link.There is growing concern about APP,which is taken as the extension to mobile device capabilities,and simultaneously mobile network shows the tendency of APP state.The paper gets help from user experience case of everyday products to analyze the necessity of user experience in the process of APP design,and proves user experience ,especially mobile user experience,has become the competition soft power of APP.Moreover,the mobile user experience is an indicator to judge the success or not of a product,and is al-so one of the elements to gain its predominance in the fierce market competition of APP,as well as under the background of technological convergence between enterprises.%未来的互联网将是以移动网络链接为主的移动互联网,APP 作为移动设备功能的扩展,受到越来越多用户的关注,移动互联网有 APP 化的趋势。从日常产品的用户体验案例分析 APP 设计中用户体验的必要性,说明用户体验、尤其是移动用户体验成为 APP 的竞争软实力,成为衡量产品成功与否的一项指标,也是助力在激烈 APP 市场竞争、趋同的企业间技术突围而出的要素之一。

  6. The Influence of Service Recovery Strategies on Word Of Mouth: Views of Mobile Phone Users

    Samsudin Wahab

    2012-05-01

    Full Text Available This study explores the relationship between perceived customer dimensions of justice and word of mouth among the selected university students in mobile phone usage. The respondent used for this study was 500 business students of Malaysian university students located in Kelang Valley. Out of 327 questionnaires distributed, there were 181 complainants. Dimensions of justice act as an independent variable consisted of procedural, interactional and distributional justice. In order to determine the relationship between dimensions of justice and customer satisfaction the researcher used multiple regressions. The result showed that distributional justice and interactional justice as a significant unique contribution to the prediction of customer word of mouth. Further research should be carried out to identify the other factors of service recovery strategies that will help in increasing the customer satisfaction towards the organization. As this research was conducted in the telecommunication sector, it would be appropriate if further research can investigate if customers from the other sectors can display similar behavior. It is because different sectors will come out with different outcomes, thus it can help the organization to know the differences between the sectors and then take appropriate actions.

  7. Adaptation Of Web Users Self-Efficacy Scale (Wuse) to Turkish: Validity and Rehability Study

    ALTUN, Taner; Palancı, Mehmet

    2015-01-01

    The aim of this study is to adopt Web Users Self-Efficacy Scale (WUSE) developed by Eachus & Cassidy (2006) to Turkish and analyze its validity and reliability. A total of 706 students studying at Karadeniz Technical University (KTU), Gazi University (GU), Sakarya University (SU) and Kırıkkale University (KU) participated in the study. Validity and reliability analyses were done after completing linguistic equivalency and its appropriateness to Turkish. For the structural validity “Explorator...

  8. The expression of CG9940 affects the adaptation of cardiac function, mobility, and lifespan to exercise in aging Drosophila.

    Wen, Deng-Tai; Zheng, Lan; Ni, Liu; Wang, Hui; Feng, Yue; Zhang, Min

    2016-10-01

    The CG9940 gene, which encodes the NAD(+) synthase protein in Drosophila, is conserved in human, zebra fish, and mosquito. NAD(+) synthase is a homodimer, which catalyzes the final step in de novo nicotinamide adenine dinucleotide (NAD(+)) biosynthesis, an amide transfer from either ammonia or glutamine to nicotinic acid adenine dinucleotide (NaAD). Both the CG9940 and exercise are closely relative to NAD(+) level, and NAD(+) plays important roles not only in energy metabolism and mitochondrial functions but also in aging. In our study, the expression of CG9940 was changed by UAS/GAL4 system in Drosophila. Flies were trained by a training device. Cardiac function was analyzed by M-mode traces, climbing index was measured through negative geotaxis assay, and lifespan was measured via lifespan assays. The important new findings from our present study included the following: (1) the expression of the CG9940 could affect cardiac function, mobility, and lifespan in Drosophila. Over-expression of the CG9940 gene had positive effects on Drosophila, such as enhanced aging cardiac output, reduced heart failure, delayed age-related mobility decline, and prolonged lifespan, but lower-expression of the CG9940 had negative effects on them. (2) Different expressions of the CG9940 resulted in different influences on the adaptation of cardiac function, mobility, and lifespan to exercise in aging Drosophila. Both normal-expression and over-expression of the CG9940 resulted in positive influences on the adaptation of cardiac functions, mobility, and lifespan to exercise in aging Drosophila such as exercise slowed age-related decline of cardiac function, mobility and extent of lifespan in these flies, while lower-expression of the CG9940 led to negative impacts on the adaptation of mobility and lifespan to exercise in Drosophila. PMID:27448710

  9. Adaptive-backstepping force/motion control for mobile-manipulator robot based on fuzzy CMAC neural networks

    Thang-Long MAI; Yaonan WANG

    2014-01-01

    In this paper, an adaptive backstepping fuzzy cerebellar-model-articulation-control neural-networks control (ABFCNC) system for motion/force control of the mobile-manipulator robot (MMR) is proposed. By applying the ABFCNC in the tracking-position controller, the unknown dynamics and parameter variation problems of the MMR control system are relaxed. In addition, an adaptive robust compensator is proposed to eliminate uncertainties that consist of approximation errors, uncertain disturbances. Based on the tracking position-ABFCNC design, an adaptive robust control strategy is also developed for the nonholonomic-constraint force of the MMR. The design of adaptive-online learning algorithms is obtained by using the Lyapunov stability theorem. Therefore, the proposed method proves that it not only can guarantee the stability and robustness but also the tracking performances of the MMR control system. The effectiveness and robustness of the proposed control system are verified by comparative simulation results.

  10. An Evolutionary Study of Rich Mobile Applications

    Abolfazli, Saeid; Sanaei, Zohre; Shiraz, Muhammad; Keshavarz, Hassan; Gani, Abdullah

    2012-01-01

    Delivering Rich User eXperience (RUX) with the current explosion of smartphone as real ubiquitous computing device requires adaptive application architecture. Rich Mobile Application (RMA) is likely the candidate architecture for future mobile applications to deliver rich, immersive experience to the smartphone users. Research and development in domain of RMA has started and results are appearing in literature which advocates its future trend and encourages review of RMAs. This article aims t...

  11. Adaptive Modulation with Best User Selection over Non-Identical Nakagami Fading Channels

    Rao, Anlei

    2012-09-08

    In this paper, we analyze the performance of adaptive modulation with single-cell multiuser scheduling over independent but not identical distributed (i.n.i.d.) Nakagami fading channels. Closed-form expressions are derived for the average channel capacity, spectral efficiency, and bit-error-rate (BER) for both constant-power variable-rate and variable-power variable-rate uncoded M-ary quadrature amplitude modulation (M-QAM) schemes. We also study the impact of time delay on the average BER of adaptive M-QAM. Selected numerical results show that the multiuser diversity brings a considerably better performance even over i.n.i.d. fading environments.

  12. Barcode Payment System in Trusted Mobile Devices

    Vibha Kaw Raina

    2012-11-01

    Full Text Available Mobile payment is an application of mobile commerce which facilitates mobile commerce transactions by providing the mobile customer with a convenient means to pay. Many mobile payment methods have been proposed and implemented like user friendly, customer centric, merchant centric where security concerns are highly addressed. This paper proposes a mobile payment model with barcodes for mobile users to improve mobile user experience in mobile payment. Unlike other existing mobile payment systems, the proposed payment solution provides distinct advantages to support buy-and-sale products and services based on 2D Barcodes. The aim of this work is to integrate a model of payment with the financial services, including payment and banking ones, based on two primary capabilities: the use of computational resources of a trusted mobile device and the establishment of a user controlled channel with the customer’s bank. The proposed architecture is characterized bank-centric, since the bank acts consultatively, informatively and protectively for the end user and it offers flexibility, adaptability and continuous extendibility to open technologies.

  13. Advanced and Effective Learning in Context Aware and Adaptive Mobile Learning Scenarios

    Nagella Uday Bhaskar; Paladugu Govindarajulu

    2010-01-01

    The ability to support students/learners to learn on the move at any place and at any time is new task to be addressed by using the mobile devices of the learners. Mobile technology support has given birth to the concept of mobile learning possessing a wide spectrum of applications and new teaching and learning techniques. This paper discusses a study conducted for undergraduate students on the effect of mobile technology usage in a learning process. The results showcased here indicate accept...

  14. A Plausible Comprehensive Web Intelligent System for Investigation of Web User Behaviour Adaptable to Incremental Mining

    V.V.R. Maheswara Rao

    2010-08-01

    Full Text Available With the continued increase in the usage of the World Wide Web (WWW Web mining has beenestablished as an important area of research. The WWW is a vast repository of unstructured information,in the form of interrelated files, distributed on numerous web servers over wide geographical regions.Web mining deals with the discovering and analyzing of useful information from the WWW. Web usagemining focuses on investigating the potential knowledge from the browsing patterns of users and to findthe correlation between the pages on analysis. To proceed towards web intelligence, obviating the needfor human interaction, need to incorporate and embed artificial intelligence into web tools. Beforeapplying mining techniques, the data in the web log has to be pre-processed, integrated and transformed.The data pre-processing stage is the most important phase in the process of web mining and is criticaland complex in successful extraction of useful data. The web log is non scalable, impractical anddistributed in nature thus conventional data pre-processing techniques are proved to be not suitable asthey assume that the data is static. Hence intelligent system is required for capable of pre processingweblog efficiently. Due to the incremental nature of the web log, it is necessary for web miners to useincremental mining techniques to extract the usage patterns and study the visiting characteristics of user,hence one can require a comprehensive algorithm which reduces the computing cost significantly.This paper introduces an Intelligent System IPS for pre-processing of web log, in addition a learningalgorithm IFP-tree model is proposed for pattern recognition. The Intelligent Pre-processing System(IPS can differentiate human user and web search engine accesses intelligently in less time, and discardssearch engine accesses. The present system reduces the error rate and improves significant learningperformance of the algorithm. The Incremental Frequent Pattern Tree

  15. Advanced and Effective Learning in Context Aware and Adaptive Mobile Learning Scenarios

    Nagella Uday Bhaskar

    2010-01-01

    Full Text Available The ability to support students/learners to learn on the move at any place and at any time is new task to be addressed by using the mobile devices of the learners. Mobile technology support has given birth to the concept of mobile learning possessing a wide spectrum of applications and new teaching and learning techniques. This paper discusses a study conducted for undergraduate students on the effect of mobile technology usage in a learning process. The results showcased here indicate acceptance of the mobile devices into the learning process with a well appreciated enthusiasm from the learners.

  16. Mobilities

    . The selection will cover diverse topics such as theories, concepts, methods, and approaches as well as it will explore various modes of mobilities and the relationship to everyday life practices. The selection also covers the ‘politics of mobilities’ from local urban planning schemes to geopolitical...... issues of refugees and environmental degradation. The spaces and territories marked by mobilities as well as the sites marked by the bypassing of such are explored. Moreover, the architectural and technological dimensions to infrastructures and sites of mobilities will be included as well as the issues...... of power, social exclusion, consumption, surveillance and mobilities history to mention some of the many themes covered by this reference work. This new title will focus on the academic contributions to this understanding by primarily focusing on works and publications in the aftermath of the seminal...

  17. Adapting Coastal State Indicators to end-users: the iCoast Project

    Demarchi, Alessandro; Isotta Cristofori, Elena; Gracia, Vicente; Sairouní, Abdel; García-León, Manuel; Cámaro, Walther; Facello, Anna

    2016-04-01

    The extraordinary development of the built environment and of the population densities in the coastal areas are making coastal communities highly exposed. The sea level rise induced by climate change will worsen this coastal vulnerability scenario and a considerable amount of people are expected to be threatened by coastal flooding in the future. Due to the increasing number of catastrophic events, and the consequent increased number of damages and people affected, over the last decades coastal hazard management has become a fundamental activity in order to improve the resilience of coastal community. In this scenario, iCoast (integrated COastal Alert SysTem) project has been founded to develop a tool able to address coastal risks caused by extreme waves and high sea water levels in European coastal areas. In the framework of iCoast Project, a set of Coastal State Indicators (CSIs) has been developed in order to improve the forecasting and the assessment of coastal risks. CSIs are indeed parameters able to provide end-users with an essential information about coastal hazards and related impacts. Within the iCoast Project, following a comprehensive literature review about existing indicators concerning coastal risks, a list of CSIs have been chosen as parameters that can be derived from the meteorological and the hydrodynamic modules. They include both physical variables used as trigger for meteorological and flood warnings from the majority of the operational National/Regional warning systems and further essential parameters, so called 'storm integrated' coastal-storm indicators, able to describe the physical processes that drive coastal damages, such as erosion, accumulation, flooding, destructions. Nowadays, it is generally acknowledged that communities are not homogenous and hence their different vulnerable groups might need different warnings. Generally, even existing national EWS in developed countries are often ineffective to issue targeted warnings for

  18. Demographic and health related data of users of a mobile application to support drug adherence is associated with usage duration and intensity.

    Stefan Becker

    Full Text Available A wealth of mobile applications are designed to support users in their drug intake. When developing software for patients, it is important to understand the differences between individuals who have, who will or who might never adopt mobile interventions. This study analyzes demographic and health-related factors associated with real-life "longer usage" and the "usage-intensity per day" of the mobile application "Medication Plan".Between 2010-2012, the mobile application "Medication Plan" could be downloaded free of charge from the Apple-App-Store. It was aimed at supporting the regular and correct intake of medication. Demographic and health-related data were collected via an online questionnaire. This study analyzed captured data.App-related activities of 1799 users (1708 complete data sets were recorded. 69% (1183/1708 applied "Medication Plan" for more than a day. 74% were male (872/1183, the median age 45 years. Variance analysis showed a significant effect of the users' age with respect to duration of usage (p = 0.025. While the mean duration of use was only 23.3 days for users younger than 21 years, for older users, there was a substantial increase over all age cohorts up to users of 60 years and above (103.9 days. Sex and educational status had no effect. "Daily usage intensity" was directly associated with an increasing number of prescribed medications and increased from an average of 1.87 uses per day and 1 drug per day to on average 3.71 uses per day for users stating to be taking more than 7 different drugs a day (p<0.001. Demographic predictors (sex, age and educational attainment did not affect usage intensity.Users aged 60+ as well as those with complicated therapeutic drug regimens relied on the service we provided for more than three months on average. Mobile applications may be a promising approach to support the treatment of patients with chronic conditions.

  19. Touch HDR: photograph enhancement by user controlled wide dynamic range adaptation

    Verrall, Steve; Siddiqui, Hasib; Atanassov, Kalin; Goma, Sergio; Ramachandra, Vikas

    2013-03-01

    High Dynamic Range (HDR) technology enables photographers to capture a greater range of tonal detail. HDR is typically used to bring out detail in a dark foreground object set against a bright background. HDR technologies include multi-frame HDR and single-frame HDR. Multi-frame HDR requires the combination of a sequence of images taken at different exposures. Single-frame HDR requires histogram equalization post-processing of a single image, a technique referred to as local tone mapping (LTM). Images generated using HDR technology can look less natural than their non- HDR counterparts. Sometimes it is only desired to enhance small regions of an original image. For example, it may be desired to enhance the tonal detail of one subject's face while preserving the original background. The Touch HDR technique described in this paper achieves these goals by enabling selective blending of HDR and non-HDR versions of the same image to create a hybrid image. The HDR version of the image can be generated by either multi-frame or single-frame HDR. Selective blending can be performed as a post-processing step, for example, as a feature of a photo editor application, at any time after the image has been captured. HDR and non-HDR blending is controlled by a weighting surface, which is configured by the user through a sequence of touches on a touchscreen.

  20. Adaptive sliding mode dynamic controller with integrator in the loop for nonholonomic wheeled mobile robot trajectory tracking

    Asif, Muhammad; Junaid Khan, Muhammad; Cai, Ning

    2014-05-01

    In this paper, novel adaptive sliding mode dynamic controller with integrator in the loop is proposed for nonholonomic wheeled mobile robot (WMR). The modified kinematics controller is used to generate kinematics velocities of WMR which are subsequently used as the input to adaptive dynamic controller. Actuator dynamics are also derived to generate actuator voltage of WMR through torque and velocity vectors. Stability of both kinematics and dynamic controller is presented using Lyapunov stability analysis. The proposed scheme is verified and validated using computer simulations for tracking the desired trajectory of WMR. The performance of proposed scheme is compared with standard backstepping kinematics controller and classical sliding mode control. In addition, the performance is further compared with standard backstepping kinematics controller with adaptive sliding mode controller without integrator. It is shown that the proposed scheme exhibits zero steady state error, fast error convergence and robustness in the presence of continuous disturbances and uncertainties.

  1. User adaptation in long-term, open-loop myoelectric training: implications for EMG pattern recognition in prosthesis control

    He, Jiayuan; Zhang, Dingguo; Jiang, Ning; Sheng, Xinjun; Farina, Dario; Zhu, Xiangyang

    2015-08-01

    Objective. Recent studies have reported that the classification performance of electromyographic (EMG) signals degrades over time without proper classification retraining. This problem is relevant for the applications of EMG pattern recognition in the control of active prostheses. Approach. In this study we investigated the changes in EMG classification performance over 11 consecutive days in eight able-bodied subjects and two amputees. Main results. It was observed that, when the classifier was trained on data from one day and tested on data from the following day, the classification error decreased exponentially but plateaued after four days for able-bodied subjects and six to nine days for amputees. The between-day performance became gradually closer to the corresponding within-day performance. Significance. These results indicate that the relative changes in EMG signal features over time become progressively smaller when the number of days during which the subjects perform the pre-defined motions are increased. The performance of the motor tasks is thus more consistent over time, resulting in more repeatable EMG patterns, even if the subjects do not have any external feedback on their performance. The learning curves for both able-bodied subjects and subjects with limb deficiencies could be modeled as an exponential function. These results provide important insights into the user adaptation characteristics during practical long-term myoelectric control applications, with implications for the design of an adaptive pattern recognition system.

  2. Defining climate modeling user needs: which data are actually required to support impact analysis and adaptation policy development?

    Swart, R. J.; Pagé, C.

    2010-12-01

    Until recently, the policy applications of Earth System Models in general and climate models in particular were focusing mainly on the potential future changes in the global and regional climate and attribution of observed changes to anthropogenic activities. Is climate change real? And if so, why do we have to worry about it? Following the broad acceptance of the reality of the risks by the majority of governments, particularly after the publication of IPCC’s 4th Assessment Report and the increasing number of observations of changes in ecological and socio-economic systems that are consistent with the observed climatic changes, governments, companies and other societal groups have started to evaluate their own vulnerability in more detail and to develop adaptation and mitigation strategies. After an early focus on the most vulnerable developing countries, recently, an increasing number of industrialized countries have embarked on the design of adaptation and mitigation plans, or on studies to evaluate the level of climate resilience of their development plans and projects. Which climate data are actually required to effectively support these activities? This paper reports on the efforts of the IS-ENES project, the infrastructure project of the European Network for Earth System Modeling, to address this question. How do we define user needs and can the existing gap between the climate modeling and impact research communities be bridged in support of the ENES long-term strategy? In contrast from the climate modeling community, which has a relatively long history of collaboration facilitated by a relatively uniform subject matter, commonly agreed definitions of key terminology and some level of harmonization of methods, the climate change impacts research community is very diverse and fragmented, using a wide variety of data sources, methods and tools. An additional complicating factor is that researchers working on adaptation usually closely collaborate with non

  3. Geosocial-Networking App Usage Patterns of Gay, Bisexual, and Other Men Who Have Sex With Men: Survey Among Users of Grindr, A Mobile Dating App

    William C Goedel; Duncan, Dustin T

    2015-01-01

    Background Geosocial-networking apps like Grindr have been used increasingly among men who have sex with men (MSM) to meet anonymous partners. These mobile dating apps employ global positioning system technology to facilitate connections with other users based on their current location. These new technologies have generated quicker and easier modes for men who have sex with men to meet potential partners based on attraction and physical proximity. Objective The aim of this study is to describ...

  4. Context Aware Adaptable Applications - A global approach

    Philippe Roose; Sophie Laplace; Marc Dalmau

    2009-01-01

    Actual applications (mostly component based) requirements cannot be expressed without a ubiquitous and mobile part for end-users as well as for M2M applications (Machine to Machine). Such an evolution implies context management in order to evaluate the consequences of the mobility and corresponding mechanisms to adapt or to be adapted to the new environment. Applications are then qualified as context aware applications. This first part of this paper presents an overview of context and its man...

  5. OneWeb: plataforma de adaptación de contenidos web basada en las recomendaciones del W3C Mobile Web Initiative OneWeb: web content adaptation platform based on W3C Mobile Web Initiative guidelines

    Mosquera P. Fabián L.

    2011-05-01

    Full Text Available  

    Las limitaciones con respecto a la experiencia de navegabilidad y facilidad de uso constituyen los principales obstáculos que enfrenta la web móvil para lograr una amplia aceptación mundial. Recientemente el W3C ha desarrollado una iniciativa conocida como Mobile Web Initiative (MWI, la cual define un conjunto de directrices para el diseño y presentación adecuada de interfaces web dirigidas a dispositivos móviles. El presente artículo describe las principales características y los módulos funcionales de OneWeb, una plataforma de adaptación de contenidos basada en las recomendaciones de MWI, desarrollada por el Grupo de Interés en el Desarrollo de Aplicaciones Móviles para Dispositivos Móviles - W@PColombia, adscrito al Grupo de Ingeniería Telemática de la Universidad del Cauca. Adicionalmente se presentan medidas de rendimiento y una comparación con sistemas de adaptación de contenido que operan actualmente. De manera experimental se obtuvieron tiempos de respuesta satisfactorios para entornos web móviles y se logró el cumplimiento de las recomendaciones de MWI sobre un conjunto de veinte páginas de prueba.

     

     

    Restrictions regardingnavigability and user-friendliness are the main challenges the Mobile Web faces to be accepted worldwide. W3C has recently developed the Mobile Web Initiative (MWI, a set of directives for the suitable design

  6. Adaptive Competency Acquisition: Why LPN-to-ADN Career Mobility Education Programs Work.

    Coyle-Rogers, Patricia G.

    Adaptive competencies are the skills required to effectively complete a particular task and are the congruencies (balance) between personal skills and task demands. The differences between the adaptive competency acquisition of students in licensed practical nurse (LPN) programs and associate degree nurse (ADN) programs were examined in a…

  7. Adaptive Opportunistic Cooperative Control Mechanism Based on Combination Forecasting and Multilevel Sensing Technology of Sensors for Mobile Internet of Things

    Yong Jin

    2014-01-01

    Full Text Available In mobile Internet of Things, there are many challenges, including sensing technology of sensors, how and when to join cooperative transmission, and how to select the cooperative sensors. To address these problems, we studied the combination forecasting based on the multilevel sensing technology of sensors, building upon which we proposed the adaptive opportunistic cooperative control mechanism based on the threshold values such as activity probability, distance, transmitting power, and number of relay sensors, in consideration of signal to noise ratio and outage probability. More importantly, the relay sensors would do self-test real time in order to judge whether to join the cooperative transmission, for maintaining the optimal cooperative transmission state with high performance. The mathematical analyses results show that the proposed adaptive opportunistic cooperative control approach could perform better in terms of throughput ratio, packet error rate and delay, and energy efficiency, compared with the direct transmission and opportunistic cooperative approaches.

  8. A Conceptual Usability Framework for Mobile Service Consumers

    Behrouz Sefid Dashti

    2011-07-01

    Full Text Available Variation and count of mobile devices accrue each day and Service Oriented Architecture (SOA decompose the systems into loosely coupled and platform independent software services that facilitate integration of mobile devices to enterprise systems as a service consumer or provider. The prosperity of interactive systems is relayed on the realization amount of user needs according to User Centered Design (UCD requires the approach of how user prefers doing their tasks instead of forcing them such that the preference effecting factors are user’s experience, ability and so on. Beyond the UCD user’s personality could shape her/his preferences. In this paper we propose our context adaptable User Interface (UI providing framework to enhance usability for various mobile service consumers; our framework include user personality and its dimensions, user movement speed, user role in movement, available bandwidth, memory and processing power as effecting factors in presenting appropriate UI and shifting between access modalities.

  9. Mobile Lexicography

    Køhler Simonsen, Henrik

    2014-01-01

    Users are already mobile, but the question is to which extent knowledge-based dictionary apps are designed for the mobile user situation. The objective of this article is to analyse the characteristics of the mobile user situation and to look further into the stationary user situation and the...... looked up the same five medical terms while walking around a hospital bed. The data collected during the two tests include external and internal recordings, think-aloud data and interview data. The data were analysed by means of the information scientific star model, cf. (Simonsen 2011:565), and it was...

  10. Confidentiality Protection of User Data and Adaptive Resource Allocation for Managing Multiple Workflow Performance in Service-Based Systems

    An, Ho

    2012-01-01

    In this dissertation, two interrelated problems of service-based systems (SBS) are addressed: protecting users' data confidentiality from service providers, and managing performance of multiple workflows in SBS. Current SBSs pose serious limitations to protecting users' data confidentiality. Since users' sensitive data is sent in…

  11. Consumers Intention to Use a Single Platform E-Payment System: A Study Among Malaysian Internet and Mobile Banking Users

    LAI POEY CHIN

    2015-04-01

    Full Text Available This study seeks to explore Malaysian Internet and Mobile banking consumers’ in adopting a single platform E-payment system using TAM model. This research seeks to investigate whether convenience and design influence perceived ease of use and perceived usefulness. We also investigated the relationship between perceived ease of use, perceived usefulness and perceived risk with consumers’ intention to use one single platform that integrates card, internet and mobile. Respondents who used both the Internet and Mobile banking were selected to participate in the survey. AMOS version 22.0 was used to analyze the data. The empirical results suggest that convenience, design, perceived risk, perceived usefulness and perceived ease of use influence consumers’ intention to use single platform E-payment system. Therefore, convenience, design, perceived risk, perceived usefulness and perceived ease of use should be taken into consideration when designing E-payment system in order to increase the Internet and Mobile banking consumers’ intention to use.

  12. Affordances in Mobile Augmented Reality Applications

    Tor Gjøsæter

    2014-10-01

    Full Text Available This paper explores the affordances of augmented reality content in a mobile augmented reality application. A user study was conducted by performing a multi-camera video recording of seven think aloud sessions. The think aloud sessions consisted of individual users performing tasks, exploring and experiencing a mobile augmented reality (MAR application we developed for the iOS platform named ARad. We discuss the instrumental affordances we observed when users interacted with augmented reality content, as well as more complex affordances rising from conventions from media content, AR and the traditional WIMP paradigm. We find that remediation of traditional newspaper content through the MAR medium can provide engaging, pleasing and exciting user experiences. However, the some of the content still suffers from being shoveled onto the MAR platform without adapting it properly. Finally, we discuss what content was most successfully mediated to the user and how the content impacts the user experience.

  13. The Adoption Influencing Factors of Mobile SNS User%移动 SNS 用户采纳影响因素研究

    2013-01-01

    The research model of the mobile SNS user adoption influence was established,based on a number of related studies and combining with the theory of technology acceptance. It modified the model through the method of empirical analysis,which makes model to better fit the real mobile social network.%  以大量相关研究为基础,结合技术接受理论,建立了用户对移动 SNS 的采纳影响研究模型,通过实证分析的方法修正模型,使得模型较好的拟合真实移动社会网络。

  14. Doing the right task: context-aware notification for mobile police teams

    Streefkerk, J.W.

    2011-01-01

    The main argument in this thesis is that mobile technology has to adapt information presentation to the mobile use context and Human Factors (attention, workload and individual characteristics). This will provide better support for work in these domains than non-adaptive systems. We expect such context-aware mobile support (CAMS) systems to improve task performance (decision accuracy, response and handling time) and optimize the user experience (trust, preferences and acceptance). The central...

  15. SENSOR-BASED MOTION CONTROLUSING ADAPTIVE NAVIGATION RULES IN THE DYNAMIC ENVIRONMENT FOR MOBILE ROBOT

    2003-01-01

    In the multi-robots system , it's important for a robot to acquire adaptive navigation rules for reaching the goal and avoiding other robots and obstacles and in the real-time environment.An efficient approach to collision-avoidance in multi-robots system is suggested .It is based on velocity information of moving objects and the distances between the robots and the obstacles in three specified directions and makes the robot navigate adaptively without collision with each other in a complicated situation.The effectiveness of algorithm is proved by the several simple examples in the physical world.

  16. An Adaptive Procedure for Task Scheduling Optimization in Mobile Cloud Computing

    2015-01-01

    Nowadays, mobile cloud computing (MCC) has emerged as a new paradigm which enables offloading computation-intensive, resource-consuming tasks up to a powerful computing platform in cloud, leaving only simple jobs to the capacity-limited thin client devices such as smartphones, tablets, Apple’s iWatch, and Google Glass. However, it still faces many challenges due to inherent problems of thin clients, especially the slow processing and low network connectivity. So far, a number of research stud...

  17. Improved Adaptive Position Update for Geographic Routing in Mobile Ad Hoc Networks

    Mr.C.Nallusamy*1; Dr.A.Sabari2; Suresh, N.

    2014-01-01

    In geographic routing, the nodes ought to maintain up-to-date positions of their immediate neighbors. Periodic broadcasting of beacon packets that contain the geographic location coordinates of the nodes may be a new technique utilized by most geographic routing protocols to keep up neighbor positions. The traditional routing schemes demonstrate that periodic beaconing regardless of the node mobility and traffic patterns in the network are not attractive from both update cost ...

  18. Adaptive Formation Control and Collision Avoidance Using a Priority Strategy for Nonholonomic Mobile Robots

    Yanyan Dai; Kyung Sik Choi; Suk Gyu Lee

    2013-01-01

    This paper presents four novel collision avoidance processes for nonholonomic mobile robots to generate effective collision‐free trajectories when forming and maintaining a formation. A collision priority strategy integrates the static and dynamic collision priorities to avoid a collision efficiently and effectively. In addition, it minimizes the turning angle of the follower robot and decreases system computation time. When avoiding collisions between robots, a novel collision avoidance algo...

  19. Adapting the Needs of the Youht Segment by Mobile Operator in the Czech Republic

    Földesová, Simona

    2013-01-01

    The main goal of the master's thesis is to understand the actual needs of Czech Generation Y and propose a mobile services product fitting the best their needs. The topic is approach from both theoretical and practical perspective. Theoretical part proposes a better understanding of researched topic and conducts a deep market analysis. The practical part follows with the research and precise definition of the target group, its buying habits and the major unmet needs.

  20. Patterns of User Engagement with Mobile- and Web-Delivered Self-Care Interventions for Adults with T2DM: A Review of the Literature.

    Nelson, Lyndsay A; Coston, Taylor D; Cherrington, Andrea L; Osborn, Chandra Y

    2016-07-01

    Technology-delivered interventions can improve the health behaviors and clinical outcomes of persons with diabetes, but only if end users engage with these interventions. To summarize the current knowledge on engagement with technology-based interventions, we conducted a review of recent mobile- and web-delivered intervention studies for adults with type 2 diabetes published from 2011 to 2015. Among 163 identified studies, 24 studies satisfied our inclusion criteria. There was substantial variation in how intervention engagement was reported across studies. Engagement rates were lower among interventions with a longer duration, and engagement decreased over time. In several studies, older age and lower health literacy were associated with less engagement, and more engagement was associated with intervention improvement in at least one outcome, including glycemic control. Future technology-based intervention studies should report on engagement, examine and report on associations between user characteristics and engagement, and aim to standardize how this is reported, particularly in longer trials. PMID:27255269