In this paper, necessary and sufficient conditions are stated for the Craig-Sakamoto equation det(I − sA − tB) = det(I − sA)det(I − tB) to hold for all scalars s, t ∈ C. Moreover, spectral properties for matrices A and B that satisfy this equation are investigated.

The concept of development as freedom can be seen as an expansion process of real freedoms people enjoy, associated with their freedom of choices in social, political and economical spheres. Certain international agencies propose that Information and Communication Technology (ICT) allow this development to be reached more efficiently and quickly. While there are success stories galore, there is...

When was the last time you read a newspaper and was bombarded with articles you would rather not see? Current news media shows massive number of news every day. But from tragedies to happy stories, people might want to choose to read only those articles that fit their current mood. The purpose of this project is to present the Magnet News, a Web tool in which users can choose if they want to se...

In this paper we sketch a multi-step scenario of a teacher and her classroom, who uses a few computer-based learning tools and their attached teaching analytics views. The tools that are described are extensions of the toolset of the authors (ComIn-M and SMALA) and others; the scenarios should thus serve as user-story in the design of future analytical softwares that support the teacher’s manag...

Shakespeare's Romeo and Juliet starts out as a classic love story: boy meets girl, boy falls in love with girl, boy and girl get married. Of course, it turns into a tragedy when they realize that their relationship is destined to fail. Surprisingly, many offices in corporate America follow a similar-though less morbid--trend. A 2005 survey revealed that 58% of employees had dated someone at wor...

Translation of a literary text is a difficult task, for understanding literature requires knowledge of various linguistic levels of a literary text in addition to strategies and methods of translation. To this should still be added cognitive-based translation training which helps practitioners preserve the aesthetic aspects of a literary text. Focusing on short story as a genre with both ...

We use twisted stable maps to answer the following question. Let E ⊂ P2 be a smooth cubic. How many rational degree d curves pass through a general points of E , have b specified tangencies with E and c unspecified tangencies, and pass through 3d − 1 − a − 2b − c general points of P2? The answer is given as a generalization of Kontsevich’s recursion. We also investigate more general enumerative...

Dieser Artikel beschreibt die Verwendung von User Stories für die Beschreibung von Anforderungen aus Sicht des e-Learning im Kontext der Einführung eines integrierten Campusmanagementsystems. Die User Stories bilden die Grundlage für die Kommunikation zwischen den Akteuren des e-Learning und den technischen Entwicklern des Campusmanagementsystems.