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In order to make improvements to teaching, it is vital to know what students think of the way they are taught. With that purpose in mind, exhaustively analyzing the forums associated with the subjects taught at the Universitat Oberta de Cataluya (UOC) would be extremely helpful, as the university's students often post comments on their learning experiences in them. Exploiting the content of such forums...
Replicas of a multimedia object are characterized in terms of not only data structure but also quality of service (QoS). Multimedia replicas are updated by two types of write operations, i.e. enriching and impoverishing types, where some data is added and removed in a replica, respectively. Computation resources are spent to materialize, i.e. physically update multimedia replicas by encoding and decoding...
This work is the first step of a research aimed at the creation of instruments for empathy measurement in the learning - teaching process. In this context, the present article contributes to investigation towards the phenomenological approach to empathy concept (spatial theory of empathy[1]) and to the relationship between empathy and learning. The paper documents the choices made in the design stage...
This paper is concerned with the numerical simulation for electric field distributions computed by the 1-ray model combined with the 2-ray model where we have introduced amplitude modification factor alpha, propagation order of distance beta and field matching factor gamma. First, we show that the path loss Lp can be determined from alpha alone, since beta depends only on the source antenna height...
In order to have an effective utilization of the radio wave resources, it is important to estimate propagation path in the urban area. In our previous works, we have shown that the shape and material of wedges do not affect the diffracted fields. In this paper, we analyze the reflected and diffracted fields by one or two wedges and compare the effects that wedge shapes and materials give to the reflected...
The reliability of information in health social network sites (HSNs) is an imperative concern since false information can cause tremendous damage to health consumers. To mitigate the damages, we utilize our previous trust framework that captures both human trust level and its uncertainty. We show how our previously presented trust framework can be applied to several security mechanisms in HSNs including...
Estimation of the scattering of electromagnetic waves by buildings and other obstacles is very important for wireless communications in urban area. In our previous work, we have examined the diffracted fields by two horizontal edges with an arbitrary angle. In this paper, we consider the diffracted fields by two edges with an arbitrary angle which change in both horizontal and vertical directions...
Network education's examination pass rate is one of the most significant indicators of experimental college's standard of education and service. In this paper, we analyze the current network education's examination result of student from Junior Professional College to Undergraduate College, and point out the existing problems and causing reasons. To solve these problems, we suggest to construct supporting...
Nowadays, Authentication mechanism is widely applied to digital images. In this paper, we propose a self authentication mechanism with recovery ability for digital images, which is employed to protect the image during transmission over the internet. In the scheme, the image is to authenticate whether the area is modified by comparing the generated authentication code and hidden authentication code...
Personal Health Systems (PHS) allow to move the point of care from hospitals to the patient's home. Moreover, a PHS usually handles much more information and provides more appropriate diagnostic and personalized treatments to individuals. In this paper, we present the objectives, structure and expected innovations of the TAMESIS project. TAMESIS aims to contribute in advancing the state of the art...
The demand for low-cost, large-scale storage is increasing. Recently, several low-throughput storage services such as the Pogo plug Cloud have been developed. These services are based on Amazon Glacier. They have low throughput, but low cost and large capacity. Therefore, these services are suitable for backups or archiving big data and can be used instead of offline storage tiers. To utilize such...
This work describes the security architecture of MOSAIC, a protocol for clinical data exchange with multilateral agreement support. The blocks of the architecture are derived from a series of common attacks that can be done to the protocol. The fair exchange problem of the protocol is analyzed introducing the management messages that the agents must exchange in order to authorize or not the use of...
Machine Type Communication (MTC) devices perform the attach procedure without bit rate limitations, congestion arise at the core network. To prevent such congestion, Long Term Evolution (LTE) takes advantages of the group-based policing to regulate the maximum bit rate of all traffic generated by a group of MTC devices. But previous researches on Access Point Name-Aggregate Maximum Bit Rate (APN-AMBR)...
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