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Some package substrates are composed of glass fiber bundles and epoxy resin which have different electrical properties. These differences result in variations in characteristic impedance and propagation speeds, which may be detrimental at high data rates. The insertion loss (IL), within pair skew and differential to common mode conversion ratio of transmission lines may drastically increase due to...
Issues related to power quality of electrical service are becoming more and more concerning, not only because of the impact that they have both for the industrial production system and for the service industry in a globalized and competitive world, but also because of the regulatory authorities' penalty systems that are pushing Distribution System Operators (DSO) to ensure better service standards...
This paper proposes an analytical model for performance evaluation of Cellular-WLAN Heterogeneous Networks (HetNets) based on Continuous Time Markov Chain (CTMC) for variable-bit-rate (VBR) data services. This model considers system specific overheads and limitations such as limited number of supported modulation and coding scheme (MCS) of each network. Moreover, this model includes the traffic density...
The paper researches modeling method of shuttle racking system based on Automod. By analyzing the real system, the system model of shuttle racking system was put forward. A method of simulation modeling of LIFO type and the modeling step for the shuttle racking system are provided. At last, an example of some warehouse of refined grain verifies the feasibility, the effectiveness, and the reusability...
This paper reports on the mechanism design of a compact XYZ parallel flexure sage. First, a new bridge-principle amplifier is proposed by a serial connection of two fundamental bridge amplifiers. Then, a comparison study of three displacement amplifiers in terms of one-stage, two-stage, and three-stage amplifiers is conducted by performing finite-element analysis (FEA) simulations. Owing to a larger...
CPU-intensive application is one of the most commonly used application types in cloud computing. In order to effectively deal with CPU-intensive applications and improve the application efficiency of cloud computing, we researched on CPU-intensive applications. Through this study, we find some common features and characteristics of this kind of applications. Based on these characteristics, we establish...
Computer-supported collaborative learning is one of the most promising innovations to improve teaching and learning with the help of modern information and communication technology. Constructing knowledge via online collaborative and social learning has been realized as one of the ways to nurture students' higher order thinking skills. In the collaborative environment, it normally involves processes...
The introduction of a new learning method called synchronous e-learning in providing learning and training has become popular in today's e-learning environment. However, the effectiveness and learner satisfaction towards its use are still obscure. This study is conducted using the qualitative method to identify the learner satisfaction on the synchronous e-learning style and also to identify what...
Content analysis method has been widely used to assess students' response in online discussion. Selecting appropriate content analysis model is important to ensure the validity of research finding. As one of the ultimate goals in learning is to develop students' cognitive skills, this paper highlights the existing content analysis models adopted in previous studies to assess the cognitive aspect of...
Teachers confront many difficulties in the use, the design and the operationalization of their instructional scenarios on Learning Management Systems (LMSs). They don't often have a competence in IT, so they don't succeed to overcome technical and administrative features in order to concentrate on the instructional design language. In previous publications, we propose necessary analysis and steps...
An efficient graph-based method to analyze fault propagation characteristics in the complex electronic systems is proposed. Firstly, two test node selection methods are proposed to meet different level of diagnosis requirements, and a greedy algorithm is applied to find the best test nodes. Then, a fault propagation characteristics analysis model based on hierarchical signed directed graph is established,...
In this paper we address the diffusion of useful information in generalized networks each consisting of a wireless physical substrate and a social network overlay. Contrary to previous works, we consider the effect of user interest and features thereof on the spreading dynamics of useful information within these complex wireless-social networks, e.g., how interest periodicity affects the diffusion...
This paper provides a summary of the First International Workshop on Model Based Design for Cyber- Physical Systems (MB4CP 2015) in conjunction with DSN 2015 conference in Rio de Janeiro, Brazil.
Self-Organizing TDMA (S-TDMA) is a channel access technique based on a time-slotted channel and distributed slot reservation procedure. It is considered as a valid alternative to the Dedicated Short Range Communication (DSRC) standard for safety-critical (V2X) communications, because of its stable deterministic access opportunity and delay under various channel loads. This paper provides an analytical...
As a major achievement of public transport, highspeed railway (HSR) has brought about great changes on passenger travel behavior in the past decades. Meanwhile, average passenger trip distance are becoming much longer yearly. But not enough is known about passengers' performance and evaluation of the four typical long-distance travel modes, namely, HSR, ordinary train, plane and coach because previous...
Load balancing through proactive offloading users onto small cells is critical for tapping the potential of dense heterogeneous cellular networks (HCNs). However, the impact of such offloading on the uplink performance is not well understood, primarily due to the lack of tractable models. Uplink power control and spatial interference correlation further complicate the mathematical analysis as compared...
We present a performance evaluation of ITLinQ and FlashLinQ, the two most popular schemes proposed to date to channelize D2D transmissions, i.e., to parse transmissions into noninterfering sets to be allocated to separate channels. Recognizing that it captures well the spatial characteristics of D2D networks, a stochastic geometry setting is utilized for this evaluation with the parameters of either...
We present and analyse an architectural migration in the Overture tool, a tool for which the primary internal data structure is an Abstract Syntax Tree (AST). The migration was from a high-cohesion AST with functionality encapsulated in its nodes to an extensible, low-cohesion AST with functionality implemented in visitors. This was motivated by the need for a high degree of extensibility in the tool's...
Provenance captured from E-Science experimentation is often large and complex, for instance, from agent-based simulations that have tens of thousands of heterogeneous components interacting over extended time periods. The subject of study of my dissertation is the use of E-Science provenance at scale. My initial research studied the visualization of large provenance graphs and proposed an abstract...
Topic modeling has seen a surge in use for software comprehension. Although the models inferred from the source code are a great source of knowledge, they fail to fully capture the conceptual relationships between the topics. Here we investigate the use of interactive topic modeling for source code analysis by feeding-in information from the end-users, including developers and architects, to refine...
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