scholarly journals Photoelectric Observations of Stellar Occultations at Abastumani Observatory

1983 ◽  
Vol 62 ◽  
pp. 91-92
Author(s):  
A. N. Korol ◽  
V. P. Dzhapiashvili
Keyword(s):  
High Efficiency ◽  
Small Aperture ◽  
Counting System ◽  
Pulse Counting ◽  
Stellar Occultations ◽  
Photoelectric Observations ◽  
Different Characteristics

The occultations observations are traditional at Abastumani Observatory. About 3 years ago the work was started on the development of the observational equipment for measuring different characteristics of various events under investigations with as high efficiency as possible, but using relatively small aperture telescope. The program is in progress, so, at present, the following pulse-counting system is built and put into operation.

scholarly journals Using a delayed coincidence counting system to determine ²²³Ra, ²²⁴Ra in seawater sample

2021 ◽  
Vol 8 (3) ◽  
pp. 29-35
Author(s):  
Tham Vo Thi Mong ◽  
Hai Phan Son ◽  
Phuc Nguyen Van ◽  
Dao Nguyen Minh ◽  
Trung Phan Quang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Analytical Data ◽  
Nuclear Research ◽  
System Efficiency ◽  
Nuclear Research Institute ◽  
Coincidence Counting ◽  
Counting System ◽  
Radium Isotopes ◽  
Coincidence Counter ◽  
Seawater Samples

A Radium Delayed Coincidence Counter (RaDeCC) includes 3 channels (223Ra channel,224Ra channel, and total channel). It has been newly designed and assembled at Nuclear Research Institute. To determine 223Ra and 224Ra in seawater samples, the system efficiency at all 3 channels were investigated and calibrated. The research results showed that the RaDeCC operates stably and reliably with high efficiency of 26%. In this project, a procedure for measuring short half-life radium isotopes was established with a low detection limit (LOD (223Ra) = 0.002 Bq; LOD (224Ra) = 0.01 Bq), good reproducibility, and high precision. The technique is suitable for qualitative analysis of 223Ra, 224Ra in seawater samples at low concentration. The 11 coastal water samples were collected in a coastal of Ninh Thuan province. The analytical data of short-lived radium isotopes concentration in seawater at Ninh Thuan coastal area are 11.2 × 10-3 ÷ 45.5 × 10-3 mBq/L for 223Ra, and 34.7 × 10-2 ÷ 21.9 × 10-1 mBq/L for 224Ra.

scholarly journals PENGARUH JUMLAH DAN SUDUT PEMASANGAN SUDU TERHADAP DAYA TURBIN ANGIN SAVONIUS

2021 ◽  
Vol 9 (2) ◽  
pp. 17-21
Author(s):  
Purwoko ◽  
Santoso ◽  
Nurchajat
Keyword(s):  
Wind Speed ◽  
Energy Conservation ◽  
Wind Turbine ◽  
Wind Power ◽  
Urban Area ◽  
High Efficiency ◽  
Different Types ◽  
Angle Blade ◽  
Different Characteristics ◽  
Storey Building

The problem in Energy conservation is finding new opportunities for high-efficiency energy generation including wind power generating machines. This study aims to determine the effect of the number and curv angle of blade mounting on the output power of a Savonius type wind turbine. This low speed wind turbine is intended to get energy at the top of a multi-storey building in an urban area. Tests were carried out on a laboratory scale, using savonius wind turbines with a diameter of 400 mm and a height of 500 mm. The driving wind speed of the turbine is set between 1.5 to 8.5 m / s. While the number of blades used is 2 types, namely rotor with three blades and rotor with 4 blades, each of which is tested on 3 different types of curv angle blade. The investigation results are expected to show that the wind tubing from each experiment will give different characteristics. The results showed that there was an increase in efficiency in the savonius turbine with blades. The highest rotation and power occur when the turbine uses 2 blades and -50 curv angle of blade mounting

scholarly journals Efficiency of the use of perfluorocarbon gas transport drugs for various forms of anemia in animals

2021 ◽  
Vol 12 (32) ◽  
pp. 24-34
Author(s):  
Sergej V. Votrin ◽  
Sergej I. Vorobyev ◽  
Sergey B. Bolevich ◽  
Aleksandra S. Orlova ◽  
Denis D. Gudanovich
Keyword(s):  
Blood Loss ◽  
High Efficiency ◽  
Gas Transport ◽  
Clinical Analysis ◽  
Severe Anemia ◽  
Intravascular Hemolysis ◽  
Counting System ◽  
Transport Agent

Purpose: The purpose of the article is to determine the effectiveness of the use of perfluorocarbon gas vehicles in acute, severe anemia in animals caused by external blood loss and autoimmune intravascular hemolysis. Methodology: The effectiveness of the use of perfluorocarbon gas transport agents in acute, severe anemia in animals caused by external blood loss and autoimmune intravascular hemolysis was carried out based on the assessment of lethality in groups, biochemical criteria that were determined using an automatic biochemical blood analyzer and an assessment of hematocrit, which was determined using an automatic an analyzer of a general clinical analysis of blood with an impedance counting system. Results: The high efficiency of the use of perfluorocarbon gas transport drug - Perftoran in acute and severe anemia caused by external blood loss and autoimmune intravascular hemolysis was revealed on the basis of an assessment of the lethality of animals in groups in comparison with a blood preparation - donor erythrocyte mass. The lethality in the groups of animals that used the perfluorocarbon gas transport agent was significantly lower than that in the animals that used the erythrocyte mass, especially in acute and severe anemia caused by autoimmune intravascular hemolysis.

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