A review is given of methods used for generating coherent far-infrared radiation. They include
the isolation of the frequency difference between two lasers, SRS by polaritons, optical …

This article examines whether volatility targeting can improve returns, decrease tail loss,
and deliver a more stable risk profile for risk assets using the example of US equities. The …

In an experimental study of the self-excited current oscillations of a glow discharge in an
electronegative gas flowing transverse to the discharge axis, bright layers (''domains'') are …

We report on conical refraction (CR) with low-coherence light sources, such as light-emitting
diodes and decoherentized HeNe laser radiation, and demonstrate different CR patterns. In …

This article presents a practitioner's view of the evidence on the predictability of US bond
returns, using forward rates found in the academic literature. The author examines this …

[en] A glow discharge at low pressure (<= 1 torr) is investigated rather well, nevertheless
discharge properties in a gas flow at pressures 10-100 torr and higher are poorly known. …

Radiation in the far-infrared region (2 to 100 cm -1 ) has been obtained by phase matched
mixing of radiation from two TEA-CO 2 lasers in a Ga As crystal at room temperature. …

A multipass cell was used in optical pumping of ammonia molecules by CO 2 laser radiation.
Several new lasing lines were observed in the case of two-photon optical pumping of the …

For the period of 6 years we have 110 patients with recurrent bile duct stones (BDS). Were
evaluated the changes of the bile duct and bile papilla (BP), predisposing to the recurrence of …

An advantages of optical systems of information processing are the high rate of performing
transformation of 2-D images (like Fourier transform and so on) and a possibility to obtain …