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Distribution systems are naturally unbalanced as a consequence of unbalanced loads and the electrical network itself, where the use of single-phase or two-phase sections is not uncommon. In addition, a detailed representation of a typical distribution system can have tens of thousands of nodes, depending on the area selected for study and whether a three-phase representation is employed. This contrasts...
To investigate the relationship between trading volume and prices volatility in second-hand ship total markets, bulk ship, tanker and containership market, regression, VAR and EGARCH model are constructed to analyze the contemporaneous relationships, lead-lag relationships and returns volatility-volume dynamics. The positive contemporaneous relationships are identified in the four second-ship market,...
In the strategic management field, the ecosystem concept is increasing significance. This paper provides an overview of 90 previous studies on the ecosystem concept published in leading academic journals in strategic management field and clarifies the four major research streams. The first perspective is the industrial ecosystem perspective, which is based on the concept of industrial ecology. The...
In the past few decades, traditional RDBMS(Relational Database Management Systems) was a predominant technology used for storing and retrieving structured data in web and business applications since 1980. However, relational databases have started squandering its importance due to strict schema reliance and costly infrastructure. This has collectively led to the problem in upgrade hardware-software...
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...
To solve the problem of pattern matching method damage completeness which was difficult to achieve in practice, the concept of virtual damage characteristics (VDC) was presented through abstracting and refining metal structure common damage characteristics. VDC in different locations were designed and then analyzed to obtain the strain fields and build the characteristic vectors which reflected the...
Freight transport modelling is always a challenge since its complexity and the often scarce data availability, and the varying rate of detail in available databases. After a long EU wide research and development period the TRANS-TOOLS model system was developed on European continental scale with extensions to the eastern Mediterranean countries, however it raised a number of concerns during the former...
Average diurnal variations of ionospheric profile parameters B0 and B1 in 2009 are studied over Chumphon province, Thailand, and compared those variations with IRI-2012 model. The thickness parameter (B0) and the shape parameter (B1) are two main parameters to compute and depict the F2-layer electron density profile. IRI-2012, the latest version of IRI model, offers three options to provide B0 and...
This paper presents an evaluation on the reliability of the bench-mark datasets for outdoor crowd analytic surveillance systems. The credibility of the databases are assessed based on their diverseness to yield challenges of dynamic environments. The main object of this paper is to assess the challenges imposed by the databases for sudden illumination variance and effect of wavering trees. Two bench-mark...
Financial services companies are concerned with identifying when customers have moved because of customer service and marketing concerns. Knowing when customers have moved can create opportunities for these companies to better market their financial products and provide improved customer service. This paper focuses on identifying features of customers who have moved for the purpose of predicting customer...
This paper presents a generalized i-vector representation framework using the mixture of Gaussian (MoG) factor analysis for speaker verification. Conventionally, a single standard factor analysis is adopted to generate a low rank total variability subspace where the mean supervector is assumed to be Gaussian distributed. The energy that can't be represented by the low rank space is modeled by a single...
Model Based System Engineering (MBSE) approach has been frequently put in to practice for the development of embedded systems in order to achieve the business objectives like productivity and time-to-market factors. However, the selection of appropriate UML profile for system modeling is a complicated process. Furthermore, it is also critical to apply the appropriate model transformation technique...
Model-Based Testing (MBT) is a method for automating software testing and improving fault detection by using an abstracted model of the system under test to systematically generate and execute test cases. One of the main challenges in MBT is the efficient locating of fundamental causes of errors, which can be achieved using root cause analysis. As MBT is being applied to many diverse domains using...
A Networked Society based on the Internet of Things is a significant paradigm shift in the early 21st century. The advanced modern engineered systems, constituent of the networked society, within the areas of Utility, Transport, Telecommunication and Enterprise are becoming increasingly dynamic and complex. These encompass various smart devices components, including both software and hardware such...
We investigate the usage of a history-based specification approach for concurrent and distributed systems. In particular, we compare two approaches on checking that those systems behave according to their specification. Concretely, we apply runtime assertion checking and static deductive verification on two small case studies to detect specification violations, respectively to ensure that the system...
In research, many barriers to BITA are presented based on different theoretical frameworks. However, these barriers are studied either from a pure theoretical perspective or with limited empirical scope. This consequently hinders the achievement of BITA in organizations. In this paper the practitioners view of barriers to BITA are investigated aiming at producing a list of barriers which practitioners...
As scientific applications like Computational Fluid Dynamics (CFD) simulations generate more and more data, co-processing becomes the most cost effective way to process the vast amount of data generated by these simulation. In a co-processing environment, analysis and/or visualization of intermediate results occur concurrently to the simulation itself. Improved efficiency and early insight into the...
IoT/Bigdata is a hot research topic all over the world in recent years and is expecting to change the world greatly in the near future. Comparing with the data in traditional websites, Bigdata from IoT devices have 4 big V-features, i.e., volume, velocity, variety, and veracity. Due to the above four features, it is hard to provide timely services to users by data analysis, especially with the great...
Data partitioning is a popular technique to horizontally or vertically split table attributes of a Cloud database cluster to evenly distribute increasing workloads. However, hot-spots can be created due to inappropriate partitioning scheme and static partition management without considering the dynamic workload characteristics. In this paper, an automatic database partition management scheme -- APM...
The growing number and size of clinical medical records (CMRs) represents new opportunities for finding meaningful patterns and patient treatment pathways while at the same time presenting a huge challenge for clinicians. Indeed, CMR repositories share many characteristics of the classical ‘big data’ problem, requiring specialised expertise for data management, extraction, and modelling. In order...
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