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Over the last few decades, there has been a growing interest in technology assisted multimedia learning. The purpose of this study was to develop an online multimedia learning system, TEDQuiz, for English language learners to practice their listening skills. The system is comprised of an easy-to-use browser extension and a personalized online learning management platform. This can help learners to...
An I/O intensive application is one of the most common applications in cloud computing, which is a dominant type in some occasions. However, few studies have focused on how to improve the processing efficiency of such specific type of applications. We have found out the performance bottlenecks based on the features obtained from I/O-intensive applications. By analyzing the features of files, we put...
People favor network distance education because this education is not restricted to time and place, besides it develops rapidly in recent years. While there is no denying that network distance education exists the shortcoming of the separation between teachers and students. So how to guarantee teachers and students' communication in real-time in the network distance education activities so that students...
Occlusion presents a major challenge in visualizing 3D flow fields using streamlines. Displaying too many streamlines creates a dense visualization filled with occluded structures, but displaying too few streams risks losing important features. A more ideal streamline exploration approach is to visually manipulate the cluttered streamlines by pulling visible layers apart and revealing the hidden structures...
Recently, the literature reported that multimedia learning is more appealing and can increase learning effectiveness. Furthermore, cued retrospective reports (CRRs) can enhance students' learning performance, especially for the novices lacking prior knowledge. In this work, a multimedia learning assistant system is constructed by applying an eye-tracking technique to record and evaluate learner's...
This paper introduces Cloud-Mobile Computing system to realize a real-time video/voice over IP (VVoIP) applications, called Cloud-VVoIP. In addition, access control designs authentication authorization, and accounting mechanism using biometrics technology (including face recognition and fingerprint identification) that is applied to secure legal access from the outsider, giving a safer way to login...
The proposed algorithm is an early termination scheme based on threshold values obtained through fuzzy inference. Using the search patterns of the MDGDS algorithm, we employed the scale factors of fuzzy inference on the three round alternative search pattern on MDGDS. Whether the search is to be terminated early is determined prior to each round of the search process to prevent unnecessary computation...
In this paper a real-time video/voice over IP (VVoIP) applications has implemented in Hadoop cloud computing system and it is denoted CLC-IHU. It really outperforms the previous VVoIP using P2P connection (called SCTP-IHU) due to the easy-to-use and high-performance on video phone call. User does not need to know what is a real IP and web interface achieves interaction by adopt TCP-based RMTP instead...
This paper considers the characteristic of highspeed train about precise timing information, such as arrival time, depending duration on station, traveling time and current location of train, to design a video proxy agent for VoD service in train. Based on the information of current active video flows, a burst prefetching scheme is developed when the high-speed train depends on station. The video...
This paper presents an automated means to predicatively detect service degradation signatures or symptoms of VDSL (Very High Bit-rate Digital Line Subscriber) based on performance monitoring measurements. It describes a management structure and methodology for trouble sectionalization and isolation to verify and confirm problem locations. This paper also provides new computing techniques to determine...
With gradual adoption of “multimedia” technologies on the curriculum designs in modern education, there are increasing needs for in-depth studies thoroughly exploring how different types of multimedia materials affecting learner's emotion and their learning performance. By the introduction of technological advancement on human physiological signals recognizing emotional variances, reliable emotion...
Learning emotion frequently generates variation in learning processes due to the affection of different learning materials or scenes. Many education scholars have pointed out that emotions are directly related to and affect learning performance. Few studies investigated the relationship between the learning emotion with learning materials owing to the difficulty of on-line assessing learning emotion...
With rapid advances in multimedia and wireless network technologies, it is now feasible to provide live video streaming over wireless networks. However, since bandwidth is a scarce resource in wireless networks, it is important to design an adaptive bandwidth allocation scheme for video streams to make efficient use of wireless bandwidth. In this paper, we propose an adaptive bandwidth allocation...
Perceptual visual quality guarantee is of vital concern for the P2P streaming system. One of challenging issues for assuring overall video quality is to design an effective media chunk scheduler. To the best of our knowledge, there is still a lack of studies on integrating video characteristics into P2P media chunk scheduler. In this work, we attempt to integrate video characteristics, i.e. rate-distortion...
This work proposes a complexity-control algorithm that efficiently utilizes encoding tools of an H.264 video coding system under different power status. Experiments performed on a power-scalable embedded system reveal the excellent rate-distortion performance with various power constraints. Specifically, the power consumption can be adjusted around 77% to 100% with PSNR degradation within 1.08 dB...
Digital video stream transferring via the network has become very popular in recent years. However, this frequent use of the Internet may increase the requirement for copyright and security. As a consequence, to prevent video stream which belongs to rightful owners from being intentionally or unknowingly used by others, information protection is indispensable. Digital watermarks have been embedded...
The allowable computational complexity of video encoding is limited in a power-constrained system. Different video frames are associated with different motions and contexts, and so are associated with different computational complexities if no complexity control is utilized. Variation in computational complexity leads to encoding delay jittering. Typically motion estimation (ME) consumes much more...
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