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The leaky integrate-and-fire model (LIF), which consists of a leaky integrator followed by a threshold-based comparator, is analyzed from a mathematical metric analysis point of view. The question is addressed whether metric properties are preserved under this non-linear operator that maps input signals to spike trains, or, synonymously, event sequences. By measuring the distance between input signals...
Twitter sentiment analysis provides organizations with real-time monitoring of public feelings towards particular products and events related to them. Most existing research is focused on extraction of sentiment features through analysis of lexical and syntactic features that are expressed explicitly through words, emoticons, exclamation marks etc. Single machine learning classifiers are usually employed...
Uncovering the topics over short text corpus has become increasingly important with the bursty development of online communications. However, conventional topic mining methods may fail due to the lack of contexts in each of the short text. Fortunately, a large proportion of online short texts often co-occur with lengthy texts, such as reviews with product descriptions and comments with news articles...
A Maturity Model is a widely used technique that is proved to be valuable to assess business processes or certain aspects of organizations, as it represents a path towards an increasingly organized and systematic way of doing business. A maturity assessment can be used to measure the current maturity level of a certain aspect of an organization in a meaningful way, enabling stakeholders to clearly...
As German TSOs are faced with the threat of north-south transmission line overloading, the option of a national bidding zone reconfiguration in the form of a separate northern and southern bidding zone is investigated. By imposing a limit on north-south transactions during market clearing, less redispatch actions are necessary afterwards, as such resulting in more efficient congestion management....
A Data Warehouse (DW) is widely used as a consistent and integrated data repository in Business Intelligence systems. Under today's dynamic and competitive business context, warehoused data alone no longer provide enough information for decision-making processes. Business analyses should be enhanced by including Linked Open Data (LOD) to offer multiple perspectives to decision-makers. This paper provides...
Continuous assessment of the quality of health-related life (HRQoL) of patients is an important aspect of health and gives rise to several readings. On one hand, the enormous amount of information that is generated allows the extraction of knowledge with great accuracy concerning the disease, the treatments and the impact it has on society, on the other hand, this continuous monitoring allows effective...
Process flexibility has been investigated in depth in the context of intra-organisational processes, but it is still an open issue when processes cross the boundaries of companies. In this paper, we address the modelling of flexible inter-organisational processes using a version-based approach. Indeed, versions are known to be a powerful technique to deal with variability, evolution and adaptation...
Providing individual and immediate feedback to students is a critical factor for improving knowledge and skills acquisition in higher education. However, a growing number of students with very different heterogeneous profiles and unequal problem solving skills, as well as the lack of teaching resources, make it very challenging and sometimes even impossible to give immediate feedback at individual...
This paper analyzes the factors technological context that uses Spanish hotels in the e-CRM systems. It is built on the model of Chang, Liao and Hsiao (2005). The data are collected from corporate web and analyzed using Rasch Model (1961). The results indicate that the technological context of e-CRM is based more on the analysis of customer information than in the integration of e-CRM technologies...
Energy consumption is a major problem in Wireless Sensor Networks (WSNs) since in most scenarios nodes operate on batteries with reduced size and low capacity. Battery lifetime estimation is therefore crucial to evaluate the network behavior over time. In addition, battery lifetime estimation is a major challenge since it depends on many factors, such as the duty cycle of supported applications and...
This paper investigates the network offloading capability of Device to Device (D2D) communication when combined with content caching. We consider a mobile network where a proportion of users are equipped with caches from which other users can retrieve contents using direct D2D communications. In this case, the offloading capacity depends both on the cache performance and the quality of the D2D links...
Due to complex and heterogeneous nature of a software being used in present-day scenario, the need for developing solution to the design related problems, where solutions were made earlier can be reused in a recurring manner. For solving various design problems, it is observed that design pattern helps to find a better solution to many of the recurring design problems. Generally, design patterns are...
The article describes the factor model of Tomsk region schools functioning which was developed and investigated using the STATISTICA system. The constructed model describes an impact of different variables (context factors) on educational results of Tomsk school graduates. At the preliminary stage the most significant variables were determined, the exploratory data analysis was made using the method...
An analysis of MATLAB® integration into mathematical modules at two UK universities is carried out. Both MATLAB integration projects appear to be successful, despite the fact that the two institutions in question are quite different, with one being a well-established research intensive institution and the other a teaching-oriented institution that gained university status in 1992. Despite these differences...
It has been stated that industrial-grade modelling tools are unsuitable for teaching modelling. We assume, however, that the experiences of the teachers and the students is strongly connected to the support available. In this paper, we present our experience with a university course on software modelling. In the first year of the course, we used a commercial modelling tool, in the second year the...
Our project COMMOOP aims to develop a competency structure model and appropriate measurement instruments for the field of object-oriented programming (OOP). We started by reviewing existing literature on competency modelling in other subject areas regarding the development methodology as well as the model structures, identified common structural elements, verified, expanded and refined these based...
IMS (IP Multimedia Subsystem) contains a variety of services and information to better fit the needs and expectation of subscribers. Based on the fact that IMS subsystem contains huge amount of available services and that similarities between them are current, we should consider risks of discovering and exposing services that may not be well oriented to subscriber profile. Beside service information,...
Littoral combat is a critical component of naval warfare that has gained importance since the late 20th century due to a shift from matched blue-water combat to agile, asymmetric warfare near the coast. With the increased relevance of this type of naval combat, the ability of a networked naval warfare System-of-Systems (SoS) to operate effectively given the challenges of operations in the littoral...
This paper presents a method to validate the insertion of a new concept in an ontology. This method is based on our previous works which add new concepts in a basic ontology using a general ontology (genaral ontology contains all the concepts of the basic ontology). To verify the semantic relevance of an ontology, we have proposed a method with three steps. First, we have found the neighborhood of...
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