منابع مشابه
Toxicity Evaluation of Smoke Pyrotechnic Compositions Based on the Dimensional Analysis of Solid Combustion Products
The use of smoke pyrotechnic compositions bring during use an intoxication risk to the staff located in the immediate proximity. One of the methods for pyrotechnic composition toxicity evaluation consists in the dimensional analysis of the solid particles resulted from the combustion and the determination of the respiratory system intrusion rate. The experimental determinations were performed f...
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Fluidization of initially segregated binary mixtures has been investigated for particle systems of the same material. This paper reports experiments conducted in 0.055m diameter fluidizes bed for binary mixtures composed of sands whose sizes ranged from 450 to 1450mm. An empirical relationship, Utf = 0.95 UF (dR)0.87, was derived in terms of the minimum fluidization of the smaller particle, UF ...
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One of the central points of the ekpyrotic cosmological scenario based on Hor̆ava-Witten theory is that we live on a negative tension brane. However, the tension of the visible brane in HW theory, as well as in relevant cases of non-standard embedding, is positive. To make this scenario realistic one must solve the problem of the negative cosmological constant on the visible brane and fine-tune ...
متن کاملEnvironmentally Benign Pyrotechnic Delays
Pyrotechnic delays are used in commercial and military items requiring a time delay between two energetic events. For example, US Army hand-held signals (HHS) use a delay element to properly sequence the expulsion of illuminating rounds at the rockets’ apex. Many military delay formulations contain barium, lead, chromates, and perchlorates. The US Army is reformulating pyrotechnic items to remo...
متن کاملA Colorimeter for Pyrotechnic Smokes *
A t ris timulus photoelectric colorimeter has been designed ~o. measure the chromaticities of p yro techni c smokes ha ving hi ghly saturat~d colors. To ~llInllmZe edg,e, effects an.d r~a: wall r efl ection t he smoke chamber was desIgn ed as a 36-111Ch cube: Ihree fil ters " el e designed to approxim.ate .the dayligh~ e I E standard observer Junctl~ns for. t he SOUl'C~ filter -pho\.otube com...
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ژورنال
عنوان ژورنال: Defence Technology
سال: 2021
ISSN: 2214-9147
DOI: 10.1016/j.dt.2020.10.003