Television Astronomical Observations at the Pulkovo Observatory

1962 ◽  
Vol 14 ◽  
pp. 361-368
Author(s):  
N. F. Kuprevich
Keyword(s):  
Adverse Effects ◽  
High Speed ◽  
The Other ◽  
Resolving Power ◽  
Television System ◽  
Atmospheric Disturbance ◽  
Pulkovo Observatory ◽  
Astronomical Observations ◽  
Video Signals ◽  
Very High

In recent years we witnessed in science and technology a wide application of the methods of television in intensifying the brightness of faint images. The increase in brightness of the image makes it, in turn, possible to shorten considerably the time of exposure. In astronomical observations using photographic techniques this proves to be very important, since it enables us to lessen the adverse effects of the atmospheric disturbance and thereby to bring the resolving power of the telescope closer to its theoretical value. Besides, in the television system the image is converted into a series of electrical signals, one following the other with very high speed. This makes it possible to perform any kind of a manipulation with the video signals—for example, to add them, to subtract them, etc., and to examine the results in the form of an image on the screen of the kinescope. On it, it is possible to view at the same time several images of simultaneous phenomena occurring at different points in space. This characteristic of the television system distinguishes it from other methods and possibilities for electron amplification of the brightness of images used in practice.

scholarly journals Deadly injuries through recoilless anti-tank weapons while military shooting practice—two case studies from Germany and Switzerland

2020 ◽  
Vol 134 (6) ◽  
pp. 2199-2204
Author(s):  
Katharina Jellinghaus ◽  
Charlotte Scherer ◽  
Edouard Stauffer ◽  
Petra Urban ◽  
Michael Bohnert ◽  
...  
Keyword(s):  
High Speed ◽  
Causes Of Death ◽  
The Body ◽  
The Other ◽  
Gas Jet ◽  
Severe Injuries ◽  
First Case ◽  
Wound Morphology ◽  
Very High ◽  
Case Versus

Abstract In this casuistry, two accidents from Germany and Switzerland are presented that happened during the shot of recoilless anti-tank weapons. In both cases, the injuries led to the death of two soldiers: A 22-year-old soldier in Germany was struck by the counter mass of a so-called Davis gun which had been fired by a comrade during a firing exercise; he died from his severe injuries, especially in the abdominal part of the body. As a peculiarity of the wound morphology, it was found to be a thick-layered, metallic, gray material in the wound cavity, which corresponded to the material of the counter mass that was ejected opposite to the shooting direction. The other case took place in Switzerland, where a 24-year-old soldier was seriously injured during an exercise with portable anti-tank rockets. At the time the shot was fired, he stood behind the launcher and was hit by the propulsion jet of the rocket motor. He died as well from his severe injuries, which were located at the chest done by the gas jet and by the very high pressure. In both cases, two different causes of death were present: massive blunt violence in the first case versus a jet of hot gases of very high speed and temperature in the second case.

scholarly journals A Character Validation Proposal for High-Speed Visual Monitoring of Expiration Codes on Beverage Cans

Proceedings ◽  
2019 ◽  
Vol 31 (1) ◽  
pp. 56
Author(s):  
Rodríguez-Rodríguez ◽  
Blasio ◽  
García ◽  
Quesada-Arencibia
Keyword(s):  
Adverse Effects ◽  
Metal Surface ◽  
High Speed ◽  
Feature Vector ◽  
General Purpose ◽  
Industrial Plant ◽  
Visual Monitoring ◽  
Specific Strategy ◽  
Printed Text ◽  
Very High

Character recognizers have generally focused on printed text on paper with an emphasis on generality rather than speed. This makes the proposed algorithms not applicable in the context of the very high-speed industrial validation of expiration codes printed on the metal surface of a can. The extreme demands of speed and the adverse effects of lighting and movement, among other things, make it necessary to develop an original and specific strategy. The strategy presented in this paper first selects which of the segmented shapes of a printed can are the best candidates for comparison with expected characters. This is followed by a technique based on the comparison of templates (templates matching), which we call “morphologies”, and are represented as bitmaps to take advantage of the hardware capabilities of general-purpose processors. The use of templates has the advantage of avoiding the construction of a feature vector. In an acquisition test in a real industrial plant, we have been able to successfully treat 438 cans in 44 s, with only one validation error in one character, achieving a compromise between speed and quality that is sufficient for industrial validation in the conditions cited.

scholarly journals DESIGN AND ANALYSIS OF LOW-POWER, HIGH-SPEED BAUGH WOOLEY MULTIPLIER

2019 ◽  
Vol 2019 (02) ◽  
pp. 60-70
Author(s):  
Karuppusamy P
Keyword(s):  
Performance Analysis ◽  
Power Consumption ◽  
Low Power ◽  
High Speed ◽  
Paper Analysis ◽  
The Other ◽  
Very High

The fundamental operations of the communication are the multiplication and division. The multiplier usually consumes a larger area and power and poses a very high latency. As all the above mentioned characteristics of the multiplier depends on the techniques utilized for the multiplication. It becomes necessary to put into effect a proper multiplier that reduces both the latency and the power consumption. So the paper analysis the performance of the various multipliers and scopes to develop a low power high speed multiplier based on the Baugh Wooley algorithm. The Performance analysis of the Baugh Wooley multiplier and the other existing multipliers is done and was found that the performance of the Baugh Wooley in terms of the latency and the power consumption was convincing compared to the other existing methods.

scholarly journals The hyperfine structure of the lines of the arc spectrum of rubidium

1933 ◽  
Vol 139 (839) ◽  
pp. 673-682 ◽  
Keyword(s):  
Fine Structure ◽  
High Frequency ◽  
The Other ◽  
Resolving Power ◽  
Nuclear Moment ◽  
Very High Frequency ◽  
Centre Of Gravity ◽  
Helium Neon ◽  
Very High ◽  
Echelon Grating

The structure of the lines of the arc spectrum of rubidium was investigated with a reflexion echelon grating of high resolving power, the light source being a tube containing helium neon mixture at about ½ mm. pressure and a small quantity of rubidium; this tube was fitted with external electrodes and excited with an oscillator of very high frequency. The two resonance lines—7947 and 7800—were found to possess the same fine structure, and each possessed four components: at 0·00, —0·09, —0·19 and —0·23 cm. -1 ; the two outer components, 0·00 and —0·23 cm. -1 , are weak and the two inner components are strong. The lines 4215 and 4201 were found to possess three components; at 0·00, —0·09 and —0·20 cm. -1 . The line at the latter point was slightly broadened. This was presumed to correspond to the same structure as that observed in the resonance lines, the broadened line corresponding to —0·19 and —0·23 unresolved. This observed structure is explained as arising from the 5S 1/2 level; the two outer, weak, components arising from the isotope 87 and corresponding to a separation into two levels, 0·23 cm. -1 apart, in the 5S 1/2 level; while the two inner, stronger, components arise from the other isotope, 85, and correspond to a similar separation of 0·10 cm. -1 . The centre of gravity of the levels of Rb 85 is displaced about 0·02 cm. -1 from that of the levels of Rb 87. Measurements on the intensities of the components of 4201 show that the probable value for the nuclear moment of Rb 85 is 3/2, but the accuracy is not sufficiently high to enable the value for the scarcer isotope Rb 87 to be determined with certainty; the probable value is, however, 5/2. The magnetic moment of the nucleus of Rb 87 is shown to be approximately two and a half times as great as that of Rb 85.

Closing the GAP—A 5Å Scanning Microscope

1969 ◽  
Vol 27 ◽  
pp. 6-7
Author(s):  
A. V. Crewe
Keyword(s):  
Normal Form ◽  
The Other ◽  
Resolving Power ◽  
Scanning Microscope ◽  
Conventional Microscope ◽  
Other Hand ◽  
Closing The Gap ◽  
Thermal Sources ◽  
Better Than ◽  
Transmission Microscope

We have become accustomed to differentiating between the scanning microscope and the conventional transmission microscope according to the resolving power which the two instruments offer. The conventional microscope is capable of a point resolution of a few angstroms and line resolutions of periodic objects of about 1Å. On the other hand, the scanning microscope, in its normal form, is not ordinarily capable of a point resolution better than 100Å. Upon examining reasons for the 100Å limitation, it becomes clear that this is based more on tradition than reason, and in particular, it is a condition imposed upon the microscope by adherence to thermal sources of electrons.

Structural changes in silicon-on-insulator material during post-implantation annealing

1986 ◽  
Vol 44 ◽  
pp. 736-737
Author(s):  
C. O. Jung ◽  
S. J. Krause ◽  
S.R. Wilson
Keyword(s):  
Integrated Circuits ◽  
Oxide Layer ◽  
High Speed ◽  
Structural Changes ◽  
Device Fabrication ◽  
Silicon On Insulator ◽  
High Quality ◽  
Radiation Hardened ◽  
Post Implantation ◽  
Very High

Silicon-on-insulator (SOI) structures have excellent potential for future use in radiation hardened and high speed integrated circuits. For device fabrication in SOI material a high quality superficial Si layer above a buried oxide layer is required. Recently, Celler et al. reported that post-implantation annealing of oxygen implanted SOI at very high temperatures would eliminate virtually all defects and precipiates in the superficial Si layer. In this work we are reporting on the effect of three different post implantation annealing cycles on the structure of oxygen implanted SOI samples which were implanted under the same conditions.

Thrombotic Thrombocytopenic Purpura: Mechanism for Effectiveness of Plasmapheresis

1979 ◽  
Author(s):  
J. G. Kelton ◽  
P. B. Neame ◽  
I. Walker ◽  
A. G. Turpie ◽  
J. McBride ◽  
...  
Keyword(s):  
Platelet Count ◽  
Thrombotic Thrombocytopenic Purpura ◽  
The Other ◽  
Unknown Etiology ◽  
Normal Range ◽  
Antiplatelet Antibody ◽  
Thrombocytopenic Purpura ◽  
Serious Illness ◽  
Normal Platelet ◽  
Very High

Thrombotic thrombocytopenic purpura (TTP) is a rare but serious illness of unknown etiology. Treatment by plasmapheresis has been reported to be effective but the mechanism for benefit is unknown. We have investigated the effect of plasmapheresis in 2 patients with TTP by quantitating platelet associated IgG (PAIgG) levels prior to and following plasmapheresis. Both patients had very high levels of PAIgG at presentation (90 and A8 fg IgG/platelet respectively, normal 0-5). in both, the PAIgG levels progressively fell to within the normal range and the platelet count rose following plasmapheresis. One patient remained in remission with normal platelet counts and PAIgG levels. The other relapsed after plasmapheresis and the PAIgG level rose prior to the fall in platelet count. Plasmapheresis was repeated and resulted in normalization of both the platelet count and PAIgG level. It is suggested that plasmapheresis removes antiplatelet antibody or immune complexes which may be of etiological importance in this illness.

YSS HAP72

Alloy Digest ◽  
2019 ◽  
Vol 68 (10) ◽  
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Tool Steel ◽  
High Speed ◽  
High Wear Resistance ◽  
Bend Strength ◽  
Temperature Performance ◽  
Very High

Abstract YSS HAP72 is a powder metallurgy high-speed tool steel with a very high wear resistance. This datasheet provides information on composition, hardness, and bend strength. It also includes information on high temperature performance. Filing Code: TS-779. Producer or source: Hitachi Metals America Ltd.

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