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In this paper, we investigate the memory properties of two popular gated units: long short term memory (LSTM) and gated recurrent units (GRU), which have been used in recurrent neural networks (RNN) to achieve state-of-the-art performance on several machine learning tasks. We propose five basic tasks for isolating and examining specific capabilities relating to the implementation of memory. Results...
Quality of Experience (QoE) of Internet services is affected by human, system, and context influence factors. While most QoE studies so far are focused on system factors only, this work will assess the impact of context factors of video streaming on QoE. As video streaming is mostly consumed from web pages, such as video portals, the investigated test conditions are applied to the web page, which...
Vehicular safety applications require reliable and up-to-date knowledge of the local neighborhood. Under IEEE 802.11p, this is attained through single-hop broadcasts of safety beacons in the control channel. However, high transmission power and node mobility can cause regions of node density to form rapidly. In such situations, excessive load on the control channel must be avoided to prevent performance...
In this paper, we address the problem of deriving test suites for checking components of interacting finite state machines with timed guards (TFSMs). Given a component TFSM, a corresponding test is derived for the composition of TFSMs under the assumption that all other components are fault-free.
In Ambient Assisted Living scenarios, elderly people are supported by pervasive and smart environments in their daily mobility and activities, with which they interact by means of a variety of devices and services deployed in the house. These devices, in addition to their particular function, can provide useful context information about the user behavior. In this paper we propose an indoor localization...
Wireless sensor networks (WSNs) face a number of security challenges that can compromise their operation. A typical security attack that can be launched by an adversary, in order to affect the network's communication, is the selective forwarding attack. If compromisation occurs, it is essential to recover the network to a stable state. In the context of mission-critical WSNs the challenge is not just...
This study establishes the use of software to provide efficiency for turnkey electrification projects in Ghana. A correlation design method is employed to a sample of thirty one stakeholders in the power distribution sector in Ghana, and it reveals that there is negative perceived ease of use of software for managements of electrical turnkey projects. T-Test conducted on usage of PM software indicated...
This paper presents a simple broadcast algorithm suited to dynamic systems where links can repeatedly appear and disappear. The algorithm is proved correct and a simple improvement is introduced, that reduces the number and the size of control messages. As it extends in a simple way a classical network traversal algorithm to the dynamic context, the proposed algorithm has also pedagogical flavor.
In Mobile Ad hoc Network (MANET) [1], packet loss rate is high because of frequent changes in the network topology and the lossy nature of radio links. In this context, it is very delicate, for reactive routing protocols, to support multimedia communication. Route request process, as well as route breakage notification, is frequently repeated. This contributes to congestion and degradation of communication...
Context management systems allow services and application easy access to remote dynamic context elements, in turns allow these to adapt to the users context. The fact that most information is dynamic and changes value over time, leads to potential risk of obtaining information mismatching the true value due to the communication delay. The probability for this we call the mismatch probability. Obtaining...
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