Article history: Received 25 March 2009 Received in revised form 23 September 2009 Available online 23 February 2010

The semiclassical geometry of charged black holes is studied in the context of a two-dimensional dilaton gravity model where effects due to pair-creation of charged particles can be included in a systematic way. The classical mass-inflation instability of the Cauchy horizon is amplified and we find that gravitational collapse of charged matter results in a spacelike singularity that precludes a...

In this paper we provide a method for evaluating interest point detectors independently of image descriptors. This is possible because we have compiled a unique data set enabling us to determine if common interest points are found. The data contains 60 scenes of a wide range of object types, and for each scene we have 119 precisely located camera positions obtained from a camera mounted on an i...

Stereo matching with regions is a master method for binocular image matching of wide baseline. It is most difficult that extracting invariant region. Stable extremal region(SER) is proposed in this paper, and its extracting algorithm. To magnify the intensity change and identify its edge easily, the exponent transform has been used. Then, the affine invariant moments of SER and the Euclid-dista...

<p>Localizing and recognizing arbitrarily oriented text in natural scene images is the biggest challenge. It because texts are often erratic shapes. This paper presents a simple effective graph representational algorithm for detecting arbitrary-oriented location to smoothen recognition process of its high impact simplicity representation. An can be horizontal, vertical, perspective, curve...

This paper presents explicit equations over Q for 32 extremal semistable elliptic K3 surfaces. They are realized as pull-back of non-semi-stable extremal rational elliptic surfaces via base change. Together with work of J. Top and N. Yui which exhibited the same procedure for the semi-stable extremal rational elliptic surfaces, this exhausts this approach to produce extremal semi-stable ellipti...

Abstract Background Minimally invasive spine surgery is dependent on accurate navigation. Computer-assisted navigation increasingly used in minimally (MIS), but current solutions require the use of reference markers surgical field for both patient and instruments tracking. Purpose To improve reliability facilitate clinical workflow, this study proposes a new marker-free tracking framework based...

We give simple exact descriptions of the null controllable regions for general linear systems with saturating actuators. The description is in terms of a set of extremal trajectories of the anti-stable subsystem. For lower order systems or systems with only real eigenvalues, this description is further simpli6ed to result in explicit formulae for the boundaries of the null controllable regions....