An Extensible Open-Source Framework for Social Network Analysis

Abstract Online communities that form social networks became extremely important in many tasks related with information processing, presentation, navigation, especially in context of web-based information systems. Web-based information systems employing communities could benefit from the classical studies of human social interactions – social network analysis. In this paper, we present an extensible open-source JAVA-based framework for social network analysis which can be used either a a stand-alone application with its own GUI as well as a library within third-party software projects developed in JAVA. We provide not only a standalone desktop application, but the whole framework, which allows anyone to incorporate results of social networks analysis into their own project, which would possibly boost up its functionality, enhance the results etc.

Enhancing Learning with Off-Task Social Dialogues

Abstract. In Peoplia, a socially intelligent tutoring agent helps students learn by augmenting learning opportunities with social features. The tutoring agent engages in off-task conversations with the students before and after the instructional activities, motivating them to work with the system more successfully. We describe the tutor's architecture and early experiments in the domain of middle school mathematics. Students who engaged with the socially intelligent agent liked the system more, and attained higher learning gains

Elektro – optický monitoring citrátu sodného aplikovatelného v hemodialýze

V této práci se popisují naše počáteční experimenty ve vývoji „on-line“ senzoru na monitoring koncentrace citrátu sodného (Na3C6H2O7) v mimo mozkovém proudění krve v průběhu hemodialýzy. Přesný a rychlý monitoring by umožnil regulaci koncentrace citrátu a návrat do krevního řečiště těla v jeho původních hodnotách, tím pacienta významně méně zatíženého než v přítomnosti. Nedávno jsme se soustředili na stanovení koncentrace měřením elektrické impedance a odrazivosti ve zkoumané krvi. Našim cílem je zkoumat trendy vlivu těchto signálů na koncentraci a vyvinout vhodnou metodiku, která může být použita později v senzorech. Částečně začínáme pracovat také na citlivosti metodiky, přičemž bychom rádi výpočtem dosáhli ekvivalentní elektrický model řešení. To je založeno na elektrochemickém dvouvrstvém modelu a korespondenci s Cole-Cole grafyIn this paper, we describe our initial steps in the development of online sensor to monitor the tri-sodium citrate concentration in extra-cerebral blood flow during haemodialysis. Accurate and fast monitoring would allow the regulation of the concentration of citrate returning to the human bloodstream to its original values, thereby, making the patient significantly less burdened than at present. In the early stages, we focused on the determination of concentration by measuring of electrical impedance and reflection in the collected blood. Our aim is to study the trends of influencing these signals by concentration and to develop a suitable methodology that can be used later in the sensor. In part, we begin working on the selectivity of the methodology that we would like to achieve by calculating the equivalent electrical model of the solution. It is based on the electrochemical double layer model and the corresponding Cole-Cole graphs