New standard temperature lamps with tungsten ribbon filaments

1979 ◽  
Vol 22 (9) ◽  
pp. 1089-1091
Author(s):  
N. S. Vdovin ◽  
T. I. Gracheva ◽  
M. M. Nikulin
2016 ◽  
Vol 2016 ◽  
pp. 1-15 ◽  
Author(s):  
Xiaoxiong Zha ◽  
Yang Zuo

This paper does some research on the mechanical property of multilayer container structure under high temperature and gives some suggestions on how to make fire protection based on the performance-based fire design. Firstly, using the software of FDS (Fire Dynamics Simulator), the fire background and fire heating release curve are determined. Through the simulation, the actual temperature curves (of the top and bottom temperature curves of the middle, door, and corner position in the container) are obtained and compared with the standard temperature curve of ISO-834. Secondly, using the software of Abaqus, a full scale finite element model of multilayer container structure is established. Two temperature fields under the standard temperature curve of ISO-834 and the actual temperature curve (of the most unfavorable curve of the top temperature curve of the middle position in the container) are obtained, respectively. Thirdly, the thermal-mechanical coupled analysis is carried out for the container structure under the wind loading and temperature field. The research result can be feasible in design and construction of container buildings and provides some references to corresponding specification preparation.


1912 ◽  
Vol 49 (1) ◽  
pp. 26-44
Author(s):  
J. Y. Buchanan

The instrument being closed, its true weight is constant.Let it be assumed that our experiments are actually made in vacuo, at the sea-level in lat. 45°. In these conditions the standard gram exerts a vertical pressure of 1 gram (true).We weigh the hydrometer and find its weight to be W grams. We now float it in distilled water contained in a suitable cylinder. In the construction of the hydrometer the internal load has been so adjusted that, when immersed in distilled water of the standard temperature T, which is to remain unaltered during the whole of the experiments, the surface of the water shall cut the stem in some line C, near its junction with the body of the instrument. Then the weight of the water displaced by the hydrometer is exactly W grams.


2014 ◽  
Vol 308 ◽  
pp. 216-220 ◽  
Author(s):  
Aniruddha Kumar ◽  
V.R. Sonar ◽  
D.K. Das ◽  
R.B. Bhatt ◽  
P.G. Behere ◽  
...  

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
S. Allam ◽  
M. Åbom

Microperforated plate (MPP) absorbers are perforated plates with holes typically in the submillimeter range and perforation ratios around 1%. The values are typical for applications in air at standard temperature and pressure (STP). The underlying acoustic principle is simple: It is to create a surface with a built in damping, which effectively absorbs sound waves. To achieve this, the specific acoustic impedance of a MPP absorber is normally tuned to be of the order of the characteristic wave impedance in the medium (∼400 Pa s/m in air at STP). The traditional application for MPP absorbers has been building acoustics often combined with a so called panel absorber to create an absorption peak at a selected frequency. However, MPP absorbers made of metal could also be used for noise control close to or at the source for noise control in ducts. In this paper, the possibility to build dissipative silencers, e.g., for use in automotive exhaust or ventilation systems, is investigated.


The Surgeon ◽  
2016 ◽  
Vol 14 (3) ◽  
pp. 164-173 ◽  
Author(s):  
Abdul R. Hakeem ◽  
Theodore Birks ◽  
Qasim Azeem ◽  
Filippo Di Franco ◽  
Szabolcs Gergely ◽  
...  

2018 ◽  
Vol 163 ◽  
pp. 07004 ◽  
Author(s):  
Wojciech Węgrzyński ◽  
Piotr Turkowski

The origins of standardised fire testing can be traced back to 1870’s, and the origin of the standard temperature-time curve to 1917. This approach, based on a 19th-century intuition is still in use up to this day, to design the 21st-century structures. Standardized fire-testing ultimately disregards the conservation of energy in the fire, as in every test the resulting temperature of the test must be the same (precisely as the temp.-time curve). To maintain this, different amount of heat is required in every test, which means that every time a different fire is modelled within the furnace. The differences between furnace fire sizes are ignored in the certification process, but can be interesting for fire researchers to understand how different materials behave in fire conditions. In this paper, Authors explore this topic by investigating the energy balance within the furnace, and comparing different fire tests together.


1976 ◽  
Vol 19 (4) ◽  
pp. 526-527
Author(s):  
V. V. Kandyba ◽  
A. N. Kisel' ◽  
V. E. Finkel'shtein
Keyword(s):  

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