scholarly journals Oscillating K Giants with the WIRE Satellite: Determination of Their Asteroseismic Masses

2008 ◽  
Vol 674 (1) ◽  
pp. L53-L56 ◽  
Author(s):  
D. Stello ◽  
H. Bruntt ◽  
H. Preston ◽  
D. Buzasi
Keyword(s):  
Satellite Determination ◽  
The Wire ◽  
K Giants

scholarly journals IX. The thermal emissivity of thin wires in air

1892 ◽  
Vol 183 ◽  
pp. 371-405 ◽  
Keyword(s):  
Unit Area ◽  
Large Change ◽  
Horizontal Cylinder ◽  
The Body ◽  
Excess Temperature ◽  
Thermal Emissivity ◽  
Thin Wires ◽  
Valuable Book ◽  
The Wire

In 1884 it was observed experimentally that whereas the electric current required to maintain a thick wire of given material, under given conditions, at a given temperature, was roughly proportional to the diameter of the wire raised to the power three-halves, the current was more nearly proportional to the first power of the diameter if the wire were thin . When this difference in the behaviour of a thick and a thin wire was first noticed it was regarded as quite unexpected. But, as pointed out by one of us in the course of a discussion at a meeting of the Royal Society, the unexpected character of the result was due to people having assumed that the loss of heat from radiation and convection per square centimetre of surface per 1° excess temperature was a constant for a given kind of surface and independent of the size and shape of the cooling body, although as early as 1868 Box had drawn attention to the great difference that existed between the rate of loss of heat from unit area of a horizontal cylinder and per unit area of a sphere. The interchange of heat between unit area of a body and the enclosure might be independent of the shape of the body as far as radiation alone was concerned, but it seemed nearly obvious that the cooling by convection must be materially affected by the shape of the cooling body. The very valuable investigations that have been made on emissivity by Mr. Macfarlane, Professor Tait, Mr. Crookes, Mr. J. T. Bottomley, and by Mr. Schleiermacher, had for their object the determination of the variation of the emissivity with changes of the surface and with change in the density of the gas surrounding the cooling body, but it was not part of these investigations to determine the change in the emissivity that is produced by change in the shape and size of the cooling body. Indeed, so little has been the attention devoted to the very large change that can be brought about in the value of the emissivity by simply changing the dimensions of the cooling body, that in Professor Everett’s very valuable book on Units and Physical Constants, the absolute results obtained by Mr. Macfarlane are given as the “results of experiments on the loss of heat from blackened and polished copper in air at atmosphere pressure,” and no reference is made either to the shape or to the size of the cooling body.

Performance analysis of the “intelligent” Kirchhoff-Law-Johnson-Noise secure key exchange

2014 ◽  
Vol 33 ◽  
pp. 1460368
Author(s):  
Janusz Smulko
Keyword(s):  
Performance Analysis ◽  
Distribution System ◽  
Key Distribution ◽  
Key Exchange ◽  
Johnson Noise ◽  
Statistical Tools ◽  
Information Theoretic ◽  
The Wire ◽  
Averaging Time

The Kirchhoff-Law-Johnson-Noise (KLJN) secure key distribution system provides a way of exchanging information theoretic secure keys by measuring the random voltage and current through the wire connecting two different resistors at Alice's and Bob's ends. Recently new advanced protocols for the KLJN method have been proposed with enhanced performance. In this paper we analyze the KLJN system and compare with “intelligent” KLJN (iKLJN) scheme. This task requires the determination of the applied resistors and the identification of the various superpositions of known and unknown noise components. Some statistical tools to determine how the duration of the bit exchange window (averaging time) influences the performance of secure bit exchange will be explored.

scholarly journals The determination of the stresses in the wire of steel wire rope at clash on the block

2021 ◽  
Vol 1 (92) ◽  
pp. 184
Author(s):  
Nataliia Fidrovska ◽  
Andrii Lomakin ◽  
Serhii Khursenko ◽  
Viktoriia Nesterenko
Keyword(s):  
Considerable Increase ◽  
Steel Wire ◽  
Tensile Force ◽  
Point Contact ◽  
Considerable Influence ◽  
Compression Force ◽  
Method Of Calculation ◽  
Extra Effort ◽  
The Wire

The article considers the problem of determining the extra effort that occurs when the steel weir rope runsng and the bend on the block. In spite of that what questions of determining the strain in ropes of carrying machines dedicate very many of works different sciences to our time no definition method of calculation of additional strains of bend in rope in the time of bend on block. For define overall increase of length wire obtain at cover of rope on the block was examine site of rope from its point contact since block to exceed widen of elongation in side of straight rope. On transition site the rope have certain curvature which is small value in comparison since curvature rope at increase additional effort on transition site not create important influence. On this score extend additional effort on transition site examine however for the straight rope. On value overall increase of the length wire transition site can have considerable influence because on this site the wire can have considerable increase of the length which summarize with value elongation receipt widen which is in rope curve on block. Although the question of defining the forces of the ropes of  Considered  steel weir rope element, which goes from a straight section to the curved on the block is a subject of very many works. In this case there arise tensile force (or compression force), which leads to the destruction of weirs of the steel weir rope. The proposed new calculation, which is based on the classical theory, namely Hooke's law. A comparison of the calculated values with the experimental ones is made.

To the Question of Evaluation of the Anode Voltage Drop

2018 ◽  
Vol 284 ◽  
pp. 519-522
Author(s):  
A.M. Osipov ◽  
Yu.V. Bezgans
Keyword(s):  
Experimental Determination ◽  
Anode Voltage ◽  
Steel Plate ◽  
Voltage Drop ◽  
Wire Electrode ◽  
Open Burning ◽  
The Wire

The paper presents the results of the evaluation of the drop of anode voltage while the open burning arc between the steel plate (cathode) and the wire electrode CuSi3Mn1. Experiments were performed to determine the temperature of metal of electrode droplets at manual and mechanized deposit welding. The results of experimental determination of heat contents and temperature of metal of electrode droplets are represented on the chart.

Investigation of Bond-Pad Etching Chemistries for Determination of Probe/Bonding Related Sub-Pad Cracks

2007 ◽  
Author(s):  
Valentina Korchnoy
Keyword(s):  
Comparative Analysis ◽  
Environmental Stress ◽  
Barrier Layer ◽  
High Reliability ◽  
Wire Bonding ◽  
Bonding Process ◽  
Microelectronic Devices ◽  
The Wire

Abstract Bond-pad integrity directly affects the performance of microelectronic devices. Bond-pad cracking and the related sub-pad cracking of Inter-Metal Dielectric (IMD) may introduce a high reliability risk and cause units to fail at environmental stress. Bond-pad cracks may be initiated by probing during wafer sort and the wire bonding process during assembly. This paper presents a comparative analysis of the various chemistries used for exposure and decoration of pad cracks. The investigation showed that a tri-iodine etch provides clean and artifact-free exposure of the TiN barrier layer of the pad and is the best (of the methods tried herein) for pad crack observation.

scholarly journals Determination of the impact of the wire velocity on the surface damage of diamond wire sawn silicon wafers

2015 ◽  
Vol 77 ◽  
pp. 881-890 ◽  
Author(s):  
Sindy Würzner ◽  
Annemarie Falke ◽  
Rajko Buchwald ◽  
Hans Joachim Möller
Keyword(s):  
Surface Damage ◽  
Silicon Wafers ◽  
Diamond Wire ◽  
The Wire ◽  
The Impact

scholarly journals B (2). Local Structure: Work in High Latitudes

1955 ◽  
Vol 1 ◽  
pp. 31-32
Keyword(s):  
Density Distribution ◽  
Local Structure ◽  
Galactic Plane ◽  
The Sun ◽  
High Latitudes ◽  
Proper Motions ◽  
K Giants

The potential possibilities of research in Kapteyn's Selected Areas at intermediate and high latitudes, where magnitudes and proper motions are already available, could be fully exploited if a more accurate spectral and luminosity classification would become available, especially for the later type stars. The purpose of work on faint stars in these latitudes is manifold. At the highest latitudes the improved data can serve for a new determination of the density distribution and of the force perpendicular to the galactic plane as a function of the distance z to the plane, K(z). The limiting magnitude may be set here at m = 13.0 (photographic). At intermediate latitudes one would hope to find the correlation between the density at some distance above the galactic plane with the density in the plane. Here the limit should be set at 13.5 or 14.0, so that G and K giants can be reached up to distances of 2 to 3 kparsecs from the Sun.

Sign in / Sign up

Export Citation Format

Share Document