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Because of innovations and improvements in technology, the use of smartphones that make it easier for users to work has become widespread. At this point, companies can reach their customers more easily and can communicate continuously. Once mobile applications are created, the system infrastructure needs to be improved in response to changing needs and demands to actively retain registered users and...
Contrary to popular belief, mobile apps can spend a large fraction of time running "hidden" as background services. And, bugs in services can translate into crashes, energy depletion, device slow-down, etc. Unfortunately, without necessary testing tools, developers can only resort to telemetries from user devices in the wild. To this end, Snowdrop is a testing framework that systematically...
We show that information extracted from crowd-based testing can enhance automated mobile testing. We introduce Polariz, which generates replicable test scripts from crowd-based testing, extracting cross-app ‘motif’ events: automatically-inferred reusable higher-level event sequences composed of lower-level observed event actions. Our empirical study used 434 crowd workers from Mechanical Turk to perform...
We investigate the technology acceptance factors of the AR smart-phone game Pokémon Go with a PLS-SEM approach based on the UTAUT2 model by Venkatesh et al. [1]. Therefore, we conducted an online study in Germany with 683 users of the game. Many other studies rely on the users' imagination of the application's functionality or laboratory environments. In contrast, we asked a relatively large user...
Air traffic and on-board data access services are expected to have tremendous growth, possibly even exponentially in the near future. In order to meet these challenges, Orthogonal Frequency Division Multiplexing (OFDM) can be deployed to enable the increased usage of broadband services on-board. The Doppler effect is one of the major issues in implementing OFDM modulation in aeronautical satellite...
More email is opened on mobile devices today than on other platforms [1]. At the same time, enterprises are constantly investing in approaches to improve employee productivity. In this paper, we consider the problem of automated information suggestions to assist in reply construction. The basic premise of the work is that a significant portion of the information content of a reply is likely to be...
Crowd sensing exploits users' smart devices and human mobility to collect information on a large scale. To realize a crowd sensing campaign, sensing tasks with spatio-temporal requirements are distributed to the devices that can provide the requested information. Typically, the distribution of sensing tasks relies on a centralized communication infrastructure such as cloud servers. However, such an...
In order to provide ubiquitous communication, seamless connectivity is now required in all environments including highly mobile networks. By using vertical handover techniques, it is possible to provide uninterrupted communication as connections are dynamically switched between wireless networks as users move around. However, in a highly mobile environment, traditional reactive approaches to handover...
We consider a mobile-CDN system where base stations (BSs) are equipped with storage for replicating and distributing content. In such a system, BSs cooperation in replying user requests is a widely adopted mechanism. For such cooperative caching, a key issue is the joint optimization of content placement and request redirection, which has been intensively investigated in the literature. However, optimizing...
In wireless coded cache network, data contents are cached in a number of mobile devices using an erasure correcting code, and a user retrieves content from other mobile devices using device-to-device communication. In this paper, we consider the repair problem when multiple devices that cache data contents fail or leave the network. By exploiting the wireless broadcast nature, we formulate the repair...
In cellular networks, tail states are designed for a tradeoff between energy efficiency and latency. However, the energy consumed during tail states becomes a huge energy drainer itself. Traditional energy saving techniques by content prefetching cannot be directly applied to mobile ads, due to the deadline requirements of ads, randomness in user behaviors, different usage patterns of mobile apps...
Mobile devices now rival desktop computers as a method of web browsing. Even so, many web applications are still designed with the desktop setting in mind. As screen sizes of mobile devices continue to get larger, operating smartphones single-handedly becomes increasingly difficult. This paper explores the possibility of automatic operating hand detection by capturing users' touch traces during normal...
Smartphone carrier companies rely on mobile networks for keeping an accurate record of customer data usage for billing purposes. In this paper, we present a vulnerability that allows an attacker to force the victim's smartphone to consume data through the cellular network by starting the data download on the victim's cell phone without the victim's knowledge. The attack is based on switching the victim's...
Dancing is always challenging especially for beginners who may lack sense of rhythm. Salsa, as a popular style of dancing, is even harder to learn due to its unique overlapped rhythmic patterns made by different Latin instruments (e.g., Clave sticks, Conga drums, Timbale drums) together. In order to dance in synchronization with the Salsa beats, the beginners always need prompts (e.g., beat counting...
In this paper, we jointly consider communication, caching and computation in a multi-user cache-assisted mobile edge computing (MEC) system, consisting of one base station (BS) of caching and computing capabilities and multiple users with computation-intensive and latency-sensitive applications. We propose a joint caching and offloading mechanism which involves task uploading and executing for tasks...
High fluctuation of signal strength is evident in wireless channel under mobile environment. IEEE 802.11n and IEEE 802.11ac based wireless technologies experience a challenge for selecting link configuration parameters, like number of spatial streams, channel bonding, advanced modulation and coding schemes, frame aggregation etc., dynamically under mobility. Selection of the best possible data rate...
In the modern information society, accurate prediction of human mobility becomes increasingly essential in various areas such as city planning and resource management. With users' historical trajectories, the inherent patterns of their movements can be extracted and utilized to accurately predict the future movements. In this paper, based on a dataset of 100,000 individuals' actively uploaded location...
The latest approaches for flexible assembly and process-integrated quality control of large components require global metrologic reference systems for various tasks, e.g. navigation of mobile transport units, control of cooperating robots or local inspection with handheld devices. While cooperative and competitive approaches for data fusion of multi-sensor metrologic systems already exist, a reference...
With the development of computers, the Internet and mobile technologies, different needs have emerged for people and different solutions have been discovered to meet these needs. One of the critical areas which are considered as the main factor in creating the tomorrow of human beings where a careful study should be done is the education and teaching. Many technologies are being used and various methods...
This study aims to design a web technology based Emergency System (SmartER) system, which will enable the doctors and nurses to perform the patient related procedures more quickly and smoothly in the emergency departments. SmartER is not just software, it is planned as a system that includes a monitor screen to be mounted on the wall, a barcode bracelet for the patients, mobile devices to be used...
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