We propose and analyze the possibility of performing two-photon continuouswave Doppler-cooling of hydrogen atoms using the 1S − 2S transition. “Quenching” of the 2S level (by coupling with the 2P state) is used to increase the cycling frequency, and to control the equilibrium temperature. Theoretical and numerical studies of the heating effect due to Doppler-free two-photon transitions evidence...

The development of a theoretical model to describe the scattering mechanisms involved in the remote sensing of rice crops is essential, as it ensures correct application of remote sensing data for rice monitoring. The theoretical model used in this study is based on the radiative transfer theory applied on a layered dense discrete random medium. The dense medium phase and amplitude correction t...

Regions of positive slope in the pressure-discharge characteristics can result in a reduction or even lack of damping of system instabilities. They are therefore one of the major concerns in design and operation of centrifugal pumps as they are limiting the admissible operating range. The considered preliminary hydraulic design of an industrial double suction pump of medium specific speed ν = 0...

This paper analyzes a Monte Carlo algorithm for solving Smoluchowski’s coagulation equation. A finite number of particles approximates the initial mass distribution. Time is discretized and random numbers are used to move the particles according to the coagulation dynamics. Convergence is proved when quasi-random numbers are utilized and if the particles are relabeled according to mass in every...

We propose the notion of the oscillator on Kähler space and consider its supersymmetrization in the presence of a constant magnetic field. Supersymmetric mechanics attracts permanent interest since its introduction witten [1]. However, studies focussed mainly on the mechanics with standard N = 2 supersymmetries (see for the review sukh [2] and refs therein). The systems with N = 4 supersymmetri...

We present three lectures on heterotic M -theory and a fourth lecture extending this theory to more general orbifolds. In Lecture 1, Hořava-Witten theory is briefly discussed. We then compactify this theory on Calabi-Yau threefolds, choosing the “standard” embedding of the spin connection in the gauge connection. We derive, in detail, both the five-dimensional effective action and the associate...

Research in building robulst NLP systems with ambiguity resolution techniques has gained momentum in recent years. In particular, the anaphora resolution initiatives have reached unpreceented heights in last 10 years or so. Mitkov et. al (2001) have reported both rule based knowledge based approaches and machine learning based ‘knowledge poor’ approaches in an ACL issue devoted to this subject....

Asymptotical analysis of concatenated codes with EXIT charts [tB99] or the AMCA [HH02b] is proven to be a powerful tool for the design of power–efficient communication systems. But, usually the result of the asymptotical analysis is a binary decision, whether convergence of iterative decoding is possible at the chosen signal–to– noise ratio, or not. In this paper it is shown how to obtain the I...

Gruber (1996) finds evidence to support selection ability among active fund investors for equity funds listed in 1982. Using a large sample of equity funds, I find evidence that newly invested money is able to predict future fund performance, in that the equally weighted portfolios of funds that receive more money subsequently perform significantly better than those that lose money. There is no...

MAGEAD is a morphological analyzer and generator for the Arabic language family, by which we mean both Modern Standard Arabic (MSA) and the spoken dialects. MAGEAD explicitly addresses the need for processing the morphology of the dialects as well. Furthermore, MAGEAD can model both phonology and orthography explicitly. In this paper, we present in detail the morphophonemic and the orthographic...