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"English Practice" is a mobile learning app that allows learners to test their English grammar usage. In this study, we observed 97,746 users and the results showed there are some factors might have certain influence on taking quiz score such as continent, country, time taking Quiz, and device screen size. First, learners who are from Europe tend to have the highest score. Asian learners...
In this paper we present a decision feedback channel estimation way for the mobile satellite communication system in order to improve the bit error performance. The transmission is disturbed not only by shadowing and multipath effects and additive white Gaussian noise, but also by the weather attenuation. The conventional Least Square(LS) is not well suited to detect the transmitter sequence, whereas...
In order to solve the problem of introducing additional Total Degradation (TD) in adaptive satellite system caused by fixed High Power Amplifier (HPA) operating point, the paper proposes an adaptive HPA Input Back-Off (IBO) algorithm carried out on the gateway side in the Forward Link of the system based on Adaptive Coding and Modulation (ACM) techniques. On the other hand, the traditional way of...
In this study, we evaluated the effect of push notifications on mobile app engagement. Over the duration of a month, we collected data from 12,071 online users of an English learning app named 'English Practice' which can be freely installed from the Google Play store. Four criteria of app engagement used by us were as follows: session count, session length, time consumption and retention. In addition,...
In this paper, we examined users' behavior and perception in a mobile English learning application called "English Practice" (EP app). EP app has been placed on Google Play store over four years and has more than 800.000 installed. The study was conducted over two months from October 2015 to December 2015 through Google Analytic by drawing on random sample of 106,912 active users from 208...
Rapid demands for large capacity services and shortage spectrum resources have motivated the deployment of small cells in LTE-A network. Small cells are low-cost, low power nodes with limited coverage region, as the existence of small cells, more sophisticated network architecture increases the difficulty in dealing with mobility management. The contradiction between traffic demands and network resources...
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