E. B. Christoffel, Gesammelte mathematische Abhandlungen, Unter Mitwirkung von A. KRAZER und G. FABER, herausgegeben von L. MAURER. Zwei Bande. B. G. Teubner, Leipzig, 1910. WHEN one turns over the pages of the collected works of a mathematician such as this one, arranged in chronological order, and notes the varied fields in which the author worked, he feels an impulse to follow the methods of...

The paper deals with the technical background and the pedagogical issues of a specific implementation for the collection, assessment and archiving of the students' assignments written in Java. The implemented system automatically applies objectoriented metrics on the collected works in order to measure the characteristic features of the assignments. Tutors use these results for the detection of...

This paper presents results of a near-infrared imaging survey for low mass stellar and substellar companions to white dwarfs. A wide field proper motion survey of 261 white dwarfs was capable of directly detecting companions at orbital separations between ∼ 100 and 5000 AU with masses as low as 0.05 M⊙, while a deep near field search of 86 white dwarfs was capable of directly detecting companio...

A heptagonal triangle is a non-isosceles triangle formed by three vertices of a regular heptagon. Its angles are π 7 , 2π 7 and 4π 7 . As such, there is a unique choice of a companion heptagonal triangle formed by three of the remaining four vertices. Given a heptagonal triangle, we display a number of interesting companion pairs of heptagonal triangles on its nine-point circle and Brocard circ...

Aging involves a deterioration of cell functions and changes that may predispose the cell to undergo an oncogenic transformation. The carcinogenic risks following radiation exposure rise with age among adults. Increasing inflammatory response, loss of oxidant/antioxidant equilibrium, ongoing telomere attrition, decline in the DNA damage response efficiency, and deleterious nuclear organization ...

No wonder you activities are, reading will be always needed. It is not only to fulfil the duties that you need to finish in deadline time. Reading will encourage your mind and thoughts. Of course, reading will greatly develop your experiences about everything. Reading spacecraft attitude determination and control quaternion based method is also a way as one of the collective books that gives ma...

This study investigates perceptions of organizational image and attractiveness among 200 potential applicants for the Belgian Defense and the person (e.g., friend, parent) accompanying them to a job fair. The instrumental-symbolic framework is applied to conceptualize the key dimensions of an organization‟s image as an employer. The results indicate that instrumental image attributes predict pe...

Educational agents (including animal companions) are a kind of interface agent, which is a significant component in educational systems, and has great impacts on student learning. However, with the development of emerging technologies (e.g., tangible technology), few studies have yet investigated how tangible technology can be used to combine with animal companions to foster student learning an...

This paper describes the evaluation of our fully integrated virtual game companions framework (ERiSA) [4]. We conducted three user studies with different scenarios using two versions of The Smile Game[4] in semi-public and public spaces. In our study, we show that the game companions’ personality was successfully perceived by the participants while interacting and playing with the game companio...

The masses of compact objects like white dwarfs, neutron stars and black holes are fundamental to astrophysics, but very difficult to measure. We present the results of an analysis of subluminous B (sdB) stars in close binary systems with unseen compact companions to derive their masses and clarify their nature. Radial velocity curves were obtained from time resolved spectroscopy. The atmospher...