The basic method for the stability analysis of nonlinear time-discrete systems is the Lyapunov functions one, cf. [1,2]. By this method many very strong results are obtained, but finding Lyapunov’s functions is often connected with serious mathematical difficulties. Explicit stability stability conditions for nonlinear multivariable systems are established mainly in the case of autonomous linea...

The growth of Internet commerce has stimulated the use of collaborative filtering (CF) algorithms as recommender systems. A CF algorithm recommends items of interest to the target user by leveraging the votes given by other similar users. In a standard CF framework, it is assumed that the credibility of every voting user is exactly the same with respect to the target user. This assumption is no...

In Recommender Systems research, algorithms are often characterized as either Collaborative Filtering (CF) or Content Based (CB). CF algorithms are trained using a dataset of user explicit or implicit preferences while CB algorithms are typically based on item profiles. These approaches harness very different data sources hence the resulting recommended items are generally also very different. ...

Presented here is a first principles based molecular modeling investigation of the possible role of the side chain in effecting proton transfer in the short-side-chain perfluorosulfonic acid fuel cell membrane under minimal hydration conditions. Extensive searches for the global minimum energy structures of fragments of the polymer having two pendant side chains of distinct separation (with che...

In recommender systems (RSs), explicit information is often preferred over implicit because it much more accurate than or predicted information; for example, the user can enter about his interests directly into system, and system will generate recommendations him. Receiving information, however, may be difficult a system. Explicit demographic might uncomfortable some users, extremely common que...

Calculi of explicit substitutions have almost always been presented using de Bruijn indices with the aim of avoiding α-conversion and being as close to machines as possible. De Bruijn indices however, though very suitable for the machine, are difficult to human users. This is the reason for a renewed interest in systems of explicit substitutions using variable names. We believe that the study o...

Contact Information: Marcel J. T. Reinders, Jun Wang Short Description: Collaborative filtering (CF) is any algorithm that filters information for a user based on a collection of user profiles. Since users having similar profiles may share similar interests. For a user, information can be filtered in/out regarding to his similar users' behaviors. User profiles can be either explicitly obtained ...

It has been suggested that the origins of cognitive modernity in the Middle/Upper Paleolithic following the appearance of anatomically modern humans was due to the onset of dual processing or contextual focus (CF), the ability to shift between different modes of thought: an explicit mode conducive to logical problem solving, and an implicit mode conducive to free-association and breaking out of...

navigational contexts can also help to avoid the problem of links which only make sense in a certain context (cf. Paolini [172], Trigg [206]). For example, if a page is part of two contexts, any links to the context root or other elements of one context will be confusing if they appear in a page which was reached as part of the other context. In the explicit link model on the right side Figure ...

In the field of IT, many competence frameworks exist. An important framework is the European e-Competence Framework (e-CF) that quite recently has been appointed as a standard by the European Committee for Standardization CEN. In this paper we define quality characteristics for competence frameworks and show how the e-CF has been mapped on descriptions of the IT domain. Our conclusion is that t...