In this paper we discuss the effect of chemical reaction and thermal radiation on unsteady free convective heat and mass transfer flow through a porous medium in a vertical wavy channel. The unsteadiness in the flow is due to the oscillatory flux in the flow region. The coupled equations governing the flow, heat and mass transfer have been solved by using a perturbation technique with the slope...

CCD BV RI photometry is presented for two type Ia supernovae 2000E and 2001V, for SN Ib 2001B and SN II-P 2001X. The parameters of light curves and absolute magnitudes at maximum light are estimated. It is shown that all four supernovae are typical for their classes considering the shape of their light curves and maximum luminosity.

Real Options were firstly formulated using traditional financial option models, however in practice an investor can confront with exotic dynamics. Nowadays, approaches based on simulations have been proposed for solving complex options. This paper proposes an alternative appraisal based on a Continuous-state Markov Process Approximation (CMPA) for multivariate Real Option problems. We discuss t...

V2540 Oph (Nova Oph 2002) was independently discovered by Katsumi Haseda and Yuji Nakamura at magnitude 9.0 on 2002 January 24 (Haseda et al. 2002). Retter et al. (2002) detected emission lines of hydrogen and Fe II, indicating that the object is an Fe II class nova caught in the early decline stage. Later examination of photographs revealed that the nova was already at magnitude 8.9 on 2002 Ja...

We present CCD photometry of the long period asteroid 1689 Floris-Jan. On the light curve from nights 1997.02.10/11 and 1997.02.11/12 we detected coherent sinelike oscillations with a period P=4.98 ± 0.01 minutes and full range amplitude of about 0.11 mag. The observations from night 1997.03.07/08 show no light variations with this period.

In this paper we present the results of our participation to the Trecvid tasks Copy Detection and Multimedia Event Detection. It focus, in particular, on the comparison of systems for the CCD task, by analyzing the importance of 1) the audio module, 2) the video module and of 3) the fusion module.

The study of charge symmetry violation in nuclear physics is a potentially enormous subject. Through a few topical examples we aim to show that it is not a subject of peripheral interest but rather goes to the heart of our understanding of hadronic systems.

Long slit spectroscopy and imaging of Mkn 423 and Mkn 739 have been performed at the 2.2 m and 3.5 m telescopes of the Calar Alto Observatory using both CCD and photographic detectors. Low and medium resolution spectra (l.8A, 3 . d ) 6.0A) together with V images have permitted to demonstrate the merging nature of Mkn 423 and the double structure of the NLR of its Seyfert component. This last fe...

This paper presents the results of observations of the inner Jovian satellites Thebe, Amalthea, Adrastea and Metis made in October–November 1999 and in November 2000. We provide ∆α and ∆δ of Thebe and Amalthea with respect to the Galilean satellites, while the positions of Adrastea and Metis are referred to either the Galilean moons or to Thebe or to Amalthea. All observed positions are compare...

A new three-point combined compact difference (CCD) scheme is developed for numerical models. The major features of the CCD scheme are: three point, implicit, sixth-order accuracy, and inclusion of boundary values. Due to its combination of the first and second derivatives, the CCD scheme becomes more compact and more accurate than normal compact difference schemes. The efficient twin-tridiagon...