Optical electronics for meteor observations

Spectral observations of meteors have been carried out for several years using an optical electronics facility. Interest has centered on faint meteors and their trails in the period of intensive meteor showers. Over 800 meteors were registered during the observation period, with spectrograms obtained for 170 of these. A total of 86 meteors were photographed from two sites and for 25 of these spectrograms of the meteors as well as their trails were obtained. All meteors have undergone routine processing in order to determine atmospheric characteristics. Results are discussed

Hard- and software problems of spaced meteor observations by optical electronics

An optical electronic facility is being used for meteor observations along with meteor radars and astronomical TV. The main parts of the facility are cameras using UM-92 optical electronic image tubes. The three cascade optical electronic image tube with magnetic focusing has a 40 mm cathode and resolution in the center of up to 30 pairs of lines/mm. The photocathode is of a multislit S-20 type. For meteor spectra observations, replica gratings of 200 and 300 lines/mm are used as the dispersive element

Assessment of The Macroeconomic Situation in North African Countries and Their Role in The System of World Economic Relations

In this article, based on the analysis of the macroeconomic situation of the North African countries, their role in the system of world economic relations is determined. It is proved that despite a certain similarity of the economic model of development of the countries of North Africa, based on the use of raw materials, the impact of external shocks causes different reactions and consequences that are incomparable in scale. It has been determined that the political and economic instability of the North African countries is reflected, among other things, in the ratings of socio-economic development published by international organizations and leading expert and analytical centers. It was revealed that the progress that was achieved by the countries of the region in previous years is largely leveled by factors of a political and religious nature, as well as a strong dependence on world markets for raw materials, which in modern conditions adds certain difficulties to these countries in the world economy

NON-HODGKIN'S LYMPHOMAS OF FEMALE REPRODUCTIVE SYSTEM

Non-Hodgkin's lymphomas are extremely rare among all tumors of female reproductive system. Diagnostic mistakes and inadequate therapeu- tic tactics in these diseases are results of usual absence of alertness of gynecologists. The aims are to analyze reasons of diagnostic mistakes in patients with non-Hodgkin's lymphomas of female reproductive system and to discover definitive clinical and morphological characteristics of female reproductive system lymphoid tumors. During the period between 1989 and 2006, 305 cases of primary extranodal non-Hodgkin's lym- phomas were detected; female reproductive system was affected in 7% of patients (totally 40 patients), which were included in investigated group. In the whole analyzed group of women (n=40, median age 43 yrs, range 17-84 yrs), patients with primary lesion of female reproductive system had median age of 40 yrs and with secondary involvement - 46 yrs. Most of patients were fertile (60%, n=24). Such tumors was localized in breast in 40% of cases (n=16), in ovaries - 20% (n=8), in uterine corpus - 12,5% (n=5), in uterine cervix - 15% (n=6), and in vagina - remaining 12,5% (n=5). Average time from diagnosis to beginning of the treatment was 7,5 months. As a result, the onset of specific therapy was delayed in 65% cases (n=26) and 50% (n=20) underwent unneeded surgery. Diagnostic mistakes lead to inadequate treatment. Extranodal non-Hodgkin’s lymphomas of female reproductive system, both primary and secondary, are rare pathology. Primary lesion is more typical for older women, sec- ondary is mainly affecting younger women (in reproductive period). Chemotherapy response and prognosis are better in primary cases