EXPERIMENTAL INVESTIGATION OF THE NM-64 NEUTRON MONITOR

A comprehensive experimental study has been made of the NM-64 neutron monitor. The counting rate has been measured as a function of the thickness of the reflector, of the separation of the counters, of the thickness of the inner moderator, and of the gas pressure in the counters. It is shown that the figures given in the internationally approved specification represent a satisfactory optimization of the design. The counting rate of the NM-64 monitor is found to be 3.3 times that of an IGY monitor of the same horizontal area. The origin and movement of both fast and thermal neutrons within the monitor have been investigated using cadmium sheets and by studying events producing counts in more than one counter.

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An Experimental Investigation of the Efficacy of Lawyers' Letters

Auditing A Journal of Practice & Theory ◽

10.2308/aud.2002.21.1.79 ◽

2002 ◽

Vol 21 (1) ◽

pp. 79-93 ◽

Cited By ~ 6

Author(s):

Jack L. Krogstad ◽

Mark H. Taylor ◽

Maribeth J. Stock

Keyword(s):

Experimental Study ◽

Experimental Investigation ◽

Lower Bound ◽

Financial Statements ◽

Law Students ◽

Potential Loss

This experimental study investigates the efficacy of lawyers' letters in providing auditors with corroborating evidence about litigation contingencies. Fifty second- and third-year law students indicate their willingness to provide auditors with estimates of the likelihoods of unfavorable outcomes and potential damages for two realistic litigation cases. The findings indicate that (1) the potential loss of attorney-client privilege and (2) likelihoods of unfavorable litigation outcomes that approach auditors' lower bound for accrual both may inhibit lawyers' responses to auditors. Overall, these findings raise doubts about the efficacy of this widely utilized auditing procedure and lead to concerns about whether litigation contingencies and corresponding losses may be underreported in financial statements.

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Experimental Investigation of Microcutting Mechanisms in Marble Grinding

Journal of Manufacturing Science and Engineering ◽

10.1115/1.4000619 ◽

2009 ◽

Vol 131 (6) ◽

Cited By ~ 8

Author(s):

LJ. Tanovic ◽

P. Bojanic ◽

R. Puzovic ◽

S. Klimenko

Keyword(s):

Experimental Study ◽

Experimental Investigation ◽

Cutting Force ◽

Surface Finish ◽

Normal Component ◽

Natural Material ◽

Grinding Process ◽

Force Component ◽

Diamond Grain

This paper offers an experimental study of the microcutting mechanisms in marble grinding to aid the optimization of the marble grinding process. The necessity for investigating these mechanisms is dictated by the increased use of marble in many applications and the fact that grinding and polishing processes are the dominant technologies used to meet surface finish requirements in this natural material. The experiments are aimed at the determination of the normal component of the cutting force and of the grain traces in microcutting with a single diamond grain. The investigations carried out make provisions for establishing critical grain penetration and cutting depths and allow the prediction of the normal cutting force component as a function of grain penetration speed and depth.

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An Experimental Investigation on the Initiation of a Single Bubble and its Growth by Laser Beam Heating : 1st Report, An Experimental Study under the Constant Pressure Phenomenon

Transactions of the Japan Society of Mechanical Engineers ◽

10.1299/kikai1938.39.955 ◽

1973 ◽

Vol 39 (319) ◽

pp. 955-961

Author(s):

Masayuki NIINO ◽

Saburo TODA ◽

Tatsuo EGUSA

Keyword(s):

Experimental Study ◽

Experimental Investigation ◽

Laser Beam ◽

Constant Pressure ◽

Single Bubble ◽

Beam Heating ◽

Laser Beam Heating

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Experimental Study on Sand and Cement Replacement by Termite Mound Soil

International Research Journal of Multidisciplinary Technovation ◽

10.34256/irjmtcon38 ◽

2019 ◽

pp. 279-287

Author(s):

Harish R ◽

Ramesh S ◽

Tharani A ◽

Mageshkumar P

Keyword(s):

Experimental Study ◽

Experimental Investigation ◽

Compressive Strength ◽

Natural Environment ◽

Fine Aggregate ◽

Test Results ◽

Termite Mound ◽

Cement Concrete ◽

Cement Ratio ◽

Compressive Strength Of Concrete

This paper presents the results of an experimental investigation of the compressive strength of concrete cubes containing termite mound soil. The specimens were cast using M20 grade of concrete. Two mix ratios for replacement of sand and cement are of 1:1.7:2.7 and 1:1.5:2.5 (cement: sand: aggregate) with water- cement ratio of 0.45 and varying combination of termite mound soil in equal amount ranging from 30% and 40% replacing fine aggregate (sand) and cement from 10%,15%,20% were used. A total of 27 cubes, 18 cylinders and 6 beams were cast by replacing fine aggregate, specimens were cured in water for 7,14 and 28 days. The test results showed that the compressive strength of the concrete cubes increases with age and decreases with increasing percentage replacement of cement and increases with increasing the replacement of sand with termite mound soil cured in water. The study concluded that termite mound cement concrete is adequate to use for construction purposes in natural environment.

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Experimental study of the thermochemical treatment of the low-grade coal prior to boiler combustion at coal-fired power station

E3S Web of Conferences ◽

10.1051/e3sconf/201910900119 ◽

2019 ◽

Vol 109 ◽

pp. 00119

Author(s):

Volodymyr Yemelianenko ◽

Vitalii Pertsevyi ◽

Oleksandr Zhevzhyk ◽

Iryna Potapchuk ◽

Oleksandr Lutai

Keyword(s):

Experimental Study ◽

Power Plants ◽

Thermal Power ◽

Thermochemical Treatment ◽

Gas Pressure ◽

Pulverized Coal ◽

Time Range ◽

Low Grade ◽

Boiler Furnace ◽

Coal Fuel

Analysis of the perspectives of the coal fuel for thermal power plants is carried out. The necessity of the experimental study for temperature measurement in the boiler furnace. The results of the experimental study are presented: temperature change over time at the burner outlet for different constant pressure value of the backlighting gas, dependence of the temperature at the burner outlet from the backlighting gas pressure for constant concentration value of pulverized coal in coal-air mixture, dependence of the temperature at the burner outlet from the concentration of pulverized coal in coal-air mixture for constant value of the backlighting gas pressure, temperature measurements for constant backlighting gas pressure value, constant value of the concentration of pulverized coal in coal-air mixture when plasmatron is switched and operates for some time range. The results of the study could be applied to the solid fuel treatment for different thermal units.

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Collisional Relaxation of Fast Electrons Energy in Gas

EPJ Web of Conferences ◽

10.1051/epjconf/202124804002 ◽

2021 ◽

Vol 248 ◽

pp. 04002

Author(s):

Alexander Metel ◽

Enver Mustafaev ◽

Yury Melnik ◽

Khaled Hamdy

Keyword(s):

Experimental Study ◽

Glow Discharge ◽

Electron Energy ◽

Initial Energy ◽

Gas Pressure ◽

Collisional Relaxation ◽

Fast Electrons ◽

Electrostatic Confinement ◽

The Mean

We present results of theoretical and experimental study of collisional relaxation of fast electrons energy in gas. The dependence on the gas pressure p and electron energy ε of the mean pass Λ of fast electrons injected into a gas being sufficient to spend on ionization all their initial energy ε has been calculated. It was found that Λ is directly proportional to ε2 and inversely proportional to the gas pressure. To sustain glow discharge with electrostatic confinement of fast electrons, Λ should be less than the mean way to the anode of emitted by the cathode electrons.

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Experimental Investigation on the Use of Bispectral Analysis in Detecting Nonlinear Faults in Hydraulic Machines

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.606.147 ◽

2014 ◽

Vol 606 ◽

pp. 147-151 ◽

Cited By ~ 1

Author(s):

M.S. Somia Alfatih ◽

M. Salman Leong ◽

L.M. Hee

Keyword(s):

Experimental Study ◽

Experimental Investigation ◽

Signal Processing ◽

Spectral Analysis ◽

Centrifugal Pump ◽

Nonlinear Behavior ◽

Suction Side ◽

Bispectral Analysis ◽

Detection And Identification ◽

Hydraulic Machines

Bispectral analysis is one of the relatively more recent tools in signal processing used for detection and identification of higher harmonics in a signal. It is also acknowledged to be one of Higher Order Spectral Analysis (HOSA) effective tools for detecting nonlinear behavior in mechanical systems. In this study, vibration sources in a hydraulic machine which may have features of nonlinear behavior were investigated. An experimental study was undertaken to formulate a more sensitive and effective method using Bispectral analysis to diagnose cavitation in a centrifugal pump facility. Cavitation was induced on the suction side of the pump. The cavitation signal was analyzed with and without induced cavitation conditions at different locations on the pump, and analyzed using FFT and bispectrum methods. It was observed that bispectral analysis could be used as an early indicator of cavitation with changes for severity of cavitation.

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Experimental investigation of slag/matte/metal/ tridymite equilibria in the Cu–Fe–O–S–Si system at 1473 K (1200°C), 1523 K (1250°C) and 1573 K (1300°C)

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.1515/ijmr-2020-1110502 ◽

2020 ◽

Vol 111 (5) ◽

pp. 365-372

Author(s):

Svetlana Sineva ◽

Jeff Chen ◽

Taufiq Hidayat ◽

Maksym Shevchenko ◽

Peter C. Hayes ◽

...

Keyword(s):

Experimental Study ◽

Experimental Investigation ◽

High Temperature ◽

Gas Phase ◽

Closed System ◽

Electron Probe ◽

Quantitative Measurement ◽

Experimental Information ◽

X Ray ◽

Fast Quenching

Abstract Laboratory experimental study was undertaken to characterise the four-phase slag/matte/metal/tridymite equilibria of the Cu-Fe-O-S-Si system at 1473 K [1200°C], 1523 K [1250° C] and 1573 [1300°C] in a "closed" system without interaction with gas phase. The research methodology involved high temperature equilibration, ultra-fast quenching of the equilibrated samples followed by quantitative measurement of the equilibrated phases by electron probe X-ray microanalysis. Attainment of chemical equilibrium was carefully checked by the 4-points test approach. The results obtained in the present study provide reliable fundamental experimental information, which is crucial for the development and optimisation of the multicomponent thermodynamic database for copper-containing systems.

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