Mitrovic, Nikola; Mena Nieto, Eduardo
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 (...
Löchtefeld, Markus; Schardt, Phillip; Krüger, Antonio;
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...
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...
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.
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...
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.
Quax, Peter; JEHAES, Tom; Wijnants, Maarten; Lamotte, Wim
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...
Hauso, Frode; Røed, Øivind
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...
Csáji, Balázs Cs; Traag, V A; Delvenne, Jean-Charles; Huens, Etienne; Van Dooren, Paul; Smoreda, Zbigniew; Blondel, Vincent D
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 ...
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...
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."
Csáji, Balázs Cs.; Browet, Arnaud; Traag, V. A.; Delvenne, Jean-Charles; Huens, Etienne; Van Dooren, Paul; Smoreda, Zbigniew; Blondel, Vincent D.
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.
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 ...
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...
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)
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.
de Clunie, Gisela T.; Clunie, Clifton; Castillo, Aris; Rangel, Norman
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…
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...
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.
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...
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...
Wasson, Glenn; Gunderson, James; Cvetanovich, Michael; Kell, Steven; Graves, S.; Felder, Robin A.
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.
H.J. Holz; K. Hofmann; C. Reed
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
Brandt, Aase; Kreiner, Svend; Iwarsson, Susanne
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...
Genaro Motti, Vivian; Vanderdonckt, Jean
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...
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.
Agergaard, Jytte; Thao, Thi Vu
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...
Larsen, Casper Schultz; Koch, Christian
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...
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...
Nidhi P. Shah
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
Furletti, Barbara; Gabrielli, Lorenzo; Rinzivillo, Salvatore; Renso, Chiara
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...
Slack, Frances; Rowley, J.
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...
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...
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.
Cuenca Gil, David
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...
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.
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.
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.
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...
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...
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.
Neha Gupta; Saba Hilal
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...
Akiki, Pierre A.; Bandara, Arosha K.; Yu, Yijun
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...
Kaushik Velusamy; Shriram K. Vasudevan; Sankari Gopalakrishnan; Subashri Vasudevan; Balachandran Arumugam
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...
Mohamd Hassan Hassan; Jehad Al-Sadi
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...
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!
Suki, Norbayah Mohd; Suki, Norazah Mohd
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…
Tukkensæter, Brage Rønning
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...
GAO Wen; HUANG Qing-ming; JIANG Shu-qiang; ZHANG Peng
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.
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...
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.
Mohbey Krishna K.; Thakur G.S.
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...
Beal, Carole R
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
Nunes, Bruno Astuto Arouche
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...
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...
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.…
Veronica S. Moertini; Criswanto D. Nugroho
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...
<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.
Christiansen, Ellen; Kanstrup, Anne Marie
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...
Schou, Saowanee; Olesen, Henning
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...
Schou, Saowanee; Olesen, Henning
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...
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...
Rosenbaum, René; Hamann, Bernd
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.
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...
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...
Varga, C; Blazovics, L; Charaf, H;
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...
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."
Luan, Tom H.; Gao, Longxiang; Li, Zhi; Xiang, Yang; Wei, Guiyi; Sun, Limin
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...
Bobtsov, Alexey; Faronov, Maxim; Kolyubin, Sergey; Pyrkin, Anton
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.
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
Petrelli, D.; Not, E.
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...
Knoche, H.; Papaleo, M.; Sasse, M.A.; Vanelli-Coralli, A.
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...
Woldmariam, MF; Ghinea, G.; Atnafu, S; Grønli, T-M
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, ...
G. Kandus; Androulidakis, I
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 ...
Veronica S. Moertini
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.
Y. Norouzzadeh Ravari; I. Markov; A. Grotov; M. Clements; M. de Rijke
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
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.
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.
Munoz-Garcia, Samuel G.; Ruiz, Javier Benedicto
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
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…
O'Grady, M.; O'Hare, G. M. P.; Sas, Corina
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, ...
Pérez-Amaral, Teodosio; Gijón, Covadonga; Garín-Muñoz, Teresa; López, Rafael
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...
Mehrnezhad, Maryam; Toreini, Ehsan; Shahandashti, Siamak F.; Hao, Feng
Gao, Wei; Lu, Haoyang
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.
Nascimento, Andrea; Sofia C., Rute; Condeixa, Tiago; Sargento, Susana
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...
Bischoff, Alexander S.
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...
Reps, Jenna; Aickelin, Uwe; Garibaldi, Jonathan M.; Damski, Chris
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...
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
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 ...
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...
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...
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.
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.
Skillen, Kerry-Louise; Chen, Liming; Nugent, Chris D; Donnelly, Mark P; Solheim, Ivar
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
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...
Cherubini, Mauro; Oliver, Nuria
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
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.
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
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.
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.
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.
G C Sahoo
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.
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.
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.
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.
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
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.
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.
Liu, Dong-sheng; Fan, Shu-jiang
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
Strauss, J. A.; Vinci, M.; Steele, W. P.; Allen, R. M.; Hellweg, M.
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.
Larsen, Jakob Eg; Halling, Søren Christian; Sigurdsson, Magnus Kristinn;
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...
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...
Sant'Anna, Leandro Machado
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.
Li, Mengmeng; Ogata, Hiroaki; Hou, Bin; Hashimoto, Satoshi; Liu, Yuqin; Uosaki, Noriko; Yano, Yoneo
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:…
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
Alicia Rodriguez-Carrion; David Rebollo-Monedero; Jordi Forné; Celeste Campo; Carlos Garcia-Rubio; Javier Parra-Arnau; Das, Sajal K
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...
Pu, Haitao; Lin, Jinjiao; Song, Yanwei; Liu, Fasheng
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…
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)
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.
Manijeh Bahrainizadeh; Abdolmajid Mosleh; Adel Pourdehghan
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...
Francisco O. Martínez P.
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.
Dalpiaz F; Serral E.; Valderas P.; Giorgini P.; Pelechano V.
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...
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.
Van Cong Pham
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.
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.
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.
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.
Chattopadhyay, Arpan; Błaszczyszyn, Bartłomiej; Altman, Eitan
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...
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
Dong-sheng Liu; Shu-jiang Fan
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...
Börjesson, Veronica; Jonsson, Karolin
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...
López-Fernández, Olatz; Honrubia-Serrano, Ma Luisa; Freixa-Blanxart, Montserrat
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
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.
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 learnerÃ¢â‚¬â„¢s perceptive, mobile learning is Ã¢â‚¬Å“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 technologiesÃ¢â‚¬Â. 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
LIU Hui; ZHANG Jun
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.
Karadimce, Aleksandar; Davcev, Danco
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...
Mohammad Othman Nassar; Feras Fares Al Mashagba; Mohammad Ali Habahbeh; Eman Fares Al Mashagba
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...
Phithakkitnukoon, Santi; Leong, Tuck; Smoreda, Zbigniew; Olivier, Patrick
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...
Aktan, Mathias; Wirén-Hallqvist, Ulf
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...
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...
Hanumansetty, Reena Gowri
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. ...
MENChaoguang; ZUODecheng; YANGXiaozong
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.
Tranos Zuva; Sunday O. Ojo; Seleman M. Ngwira; Oludayo O. Olugbara
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...
Triantafyllidis, G.A. [Informatics and Telematics Institute ITI-CERTH, Thessaloniki (Greece)]. E-mail: email@example.com; 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)
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.
Kang, Hyunjin; Shin, Wonsun
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
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.
Werner, Markus; Bischl, Hermann; Lutz, Erich
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.
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 ...
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.
Matassa, Christopher K.
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 ...
Mohammad Othman Nassar
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.
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.
Kim, Sungye; Schap, TusaRebecca; Bosch, Marc; Maciejewski, Ross; Delp, Edward J; Ebert, David S.; Boushey, Carol J.
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...
Veronika Belousova; Nikolay Chichkanov
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 ...
Veronika Belousova; Nikolay Chichkanov
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 ...
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.
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.
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.
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
Cabral, Francisco Manuel da Silva Brás Gaspar Vieira
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...
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.
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...
Qi-Ying Su; Carl Adams
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...
Guzmán Guzmán, José Daniel
[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...
Yu Fangyuan; Yang Mingchuan; Guo Qing
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.
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...
Leichtenstern, Karin; André, Elisabeth; Rehm, Matthias
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...
Rosalie H. Wang, BSc (OT, PhD
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.
Goker, A.S.; Cumming, H.; Myrhaug, H.I.
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...
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...
Corredor, Germán; Romero, Eduardo; Iregui, Marcela
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
Park, Eunjeong; Nam, Hyo Suk
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
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...
Rym Khemiri; Fadila Bentayeb
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...
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.
Miro, Jaime Valls; Black, Ross; De Bruijn, Freek; Dissanayake, Dissanayake
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
Giuseppe Vitello; Vincenzo Conti; Salvatore Vitabile; Filippo Sorbello
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...
Hua Zheng; Ying Li; Dandan Jiang
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...
Schaff, G.; Harpes, C.; Martin, R.; Junger, M.
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...
Al-Shuwaili, Ali Najdi; Simeone, Osvaldo; Bagheri, Alireza; Scutari, Gesualdo
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 ...
Junho Ahn; Richard Han
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...
Sapio, Amedeo; Risso, Fulvio Giovanni Ottavio; Baldi, Mario
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 ...
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.
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...
O. O. OLUGBARA; S. O. OJO; M. I. MPHAHLELE
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...
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...
Chen, Xu; Jiao, Lei; Li, Wenzhong; Fu, Xiaoming
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...
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.
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.
Liao, Xiaoqun; Cao, Ming; Hall, Ernest L.
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
Shakya, Indu; Stipidis, Elias
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.
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.
XULi; ZHENGBaoyu; YANGZhen
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.
Sharma, Sumit; Singh, Paramjit; Mahajan, Aditya; 10.5121/ijcsea.2012.2215
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.
Ali Haydar Sar
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.
Ali Haydar Şar
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.
Hussain, Azham; Mkpojiogu, Emmanuel O. C.; Yusof, Muhammad Mat
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.
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.
Ozer, Mert; Keles, Ilkcan; Toroslu, Hakki;
, 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...
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...
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.
Tran Xuan Nam
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.
Kirsch-Pinheiro, Manuele; Gensel, Jerôme; Martin, Hervé
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...
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.
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.
Akselsen, Are Sæterbø; Kristiansen, Kenneth
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 ...
Gordillo, Orlando Enrique
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.
M. Vallespín-Arán; S. Molinillo; F. Muñoz-Leiva
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...
Lee, Guna; Park, Joong Yeol; Shin, Soo-Yong; Hwang, Jong Su; Ryu, Hyeon Jeong; Bates, David W.
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
Moldovan, Arghir-Nicolae; Ghergulescu, Ioana; Muntean, Cristina Hava
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…
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.
Guo Jin-Li; Guo Zhao-Hua; Liu Xue-Jiao
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.
Christos K. Georgiadis
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.
Chu, Phuong Anh
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...
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
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...
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.
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.
Oliver, Iain Angus
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...
Maede Kiani Sarkaleh; Mehregan Mahdavi; Mahsa Baniardalan
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...
Glissmann, Susanne; Smolnik, Stefan; Schierholz, Ragnar; Kolbe, Lutz; Brenner, Walter
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...
Morteza Ghobakhloo; Tang S.H.; Norzima Zulkifli
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....
Georgeta-Madalina Meghisan; Flaviu Meghisan
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...
Elizabeth Fife; Juan Orjuela
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...
Lankenau, Stephen E.; Sanders, Bill; Hathazi, Dodi; Jackson Bloom, Jennifer
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
Zola, Enrica Valeria; Kassler, Andreas
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 ...
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.
Vildjiounaite, Elena; Gimel'farb, Georgy; Kyllönen, Vesa; Peltola, Johannes
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
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 ...
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.
MIN Qingfei; JI Shaobo; QU Gang
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.
Wang, W-C; Young, M; S. Love; Coxon, I; Human Centred Design Institute (HCDI) Research Seminar Series
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...
Yong-Hyuk Kim; Yourim Yoon
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...
Haustein, Sonja; Marin-Lamellet, Claude
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....
Pedersen, Nikolaj Bisgaard; Laursen, Troels; Nielsen, Jimmy Jessen;
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...
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%.
Shanmugapriya M; Dr.Tamilarasi A
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...
Fallah, Milad; Luo, Johanna
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...
Jordan, C.J.; Bee, E.J.; Smith, N. A.; Lawrie, K.I.G.; J Ford; Marchant, A.P.
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.
Smith, Benton T.
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.
Ozer, Mert; Keles, Ilkcan; Toroslu, Hakki; Karagoz, Pinar; Davulcu, Hasan
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....
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)
Ziming; LIU; Xiaobing; HUANG; Yue’an; FU
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.
Blechar, Jennifer; Constantiou, Ioanna; Damsgaard, Jan
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...
Bongartz, Sara; Jin, Yucheng; Patern?, Fabio; Rett, Joerg; Santoro, Carmen; Spano, Lucio Davide
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...
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)
Zu Yun-Xiao; Zhou Jie
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.
Selma Limam Mansar
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.
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.
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...
Dias, Miguel Sales; Pires, Carlos Galinho; Pinto, Fernando Miguel; Teixeira, Vítor Duarte; Freitas, João
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