scholarly journals PROperties of FIre Suppressant SYstems “PROFISSY” A Spreadsheet Application for Fire-Suppressant Bottle-Filling Calculations

2021 ◽  
Author(s):  
Marcia L. Huber ◽  
Eric W. Lemmon
Keyword(s):  
Fire Suppressant ◽  
Spreadsheet Application

The critical atomization conditions of high-potential fire suppressant droplets in an air flow

2021 ◽  
Vol 384 ◽  
pp. 505-521
Author(s):  
I.S. Voytkov ◽  
G.V. Kuznetsov ◽  
P.A. Strizhak
Keyword(s):  
Air Flow ◽  
High Potential ◽  
Fire Suppressant

Estimating productivity of earthmoving operations using spatial technologies1This paper is one of a selection of papers in this Special Issue on Construction Engineering and Management.

2012 ◽  
Vol 39 (9) ◽  
pp. 1072-1082 ◽  
Author(s):  
Ali Montaser ◽  
Ibrahim Bakry ◽  
Adel Alshibani ◽  
Osama Moselhi
Keyword(s):  
Real Time ◽  
Spatial Data ◽  
Data Fitting ◽  
Google Earth ◽  
Simulation Software ◽  
Distribution Functions ◽  
Automated Classification ◽  
Cycle Times ◽  
Automated Method ◽  
Spreadsheet Application

This paper presents an automated method for estimating productivity of earthmoving operations in near-real-time. The developed method utilizes Global Positioning System (GPS) and Google Earth to extract the data needed to perform the estimation process. A GPS device is mounted on a hauling unit to capture the spatial data along designated hauling roads for the project. The variations in the captured cycle times were used to model the uncertainty associated with the operation involved. This was carried out by automated classification, data fitting, and computer simulation. The automated classification is applied through a spreadsheet application that classifies GPS data and identifies, accordingly, durations of different activities in each cycle using spatial coordinates and directions captured by GPS and recorded on its receiver. The data fitting was carried out using commercially available software to generate the probability distribution functions used in the simulation software “Extend V.6”. The simulation was utilized to balance the production of an excavator with that of the hauling units. A spreadsheet application was developed to perform the calculations. An example of an actual project was analyzed to demonstrate the use of the developed method and illustrates its essential features. The analyzed case study demonstrates how the proposed method can assist project managers in taking corrective actions based on the near-real-time actual data captured and processed to estimate productivity of the operations involved.

scholarly journals Machinery Space Fire Fighting – Modern Alternatives

2018 ◽  
Author(s):  
T Goode
Keyword(s):  
Fire Suppression ◽  
Health And Safety ◽  
Alternative Methods ◽  
Royal Navy ◽  
Safety Issues ◽  
Fire Extinguishing ◽  
Small Craft ◽  
Accidental Discharge ◽  
Fire Suppressant ◽  
Machinery Space

Machinery spaces in the majority of Royal Navy (RN) vessels use carbon dioxide (CO2) as the primary fire suppressant. While CO2 is very effective for firefighting, particularly in machinery space application, it is harmful to life in the concentrations required for effective fire suppression; exposure to concentrations greater than 15% can cause death within sixty seconds. The use of CO2 and similar fire suppressant systems in machinery spaces presents a risk due to the potential exposure of personnel. This may occur in a fire scenario where personnel are unable to escape the affected compartment, if there is a leak in the system, or due to accidental discharge. These risks are typically mitigated through physical means and procedural controls. However, in the hierarchy of safety controls the primary means should always be the elimination of the hazard. Babcock Energy and Marine undertook a study for the United Kingdom Ministry of Defence (MoD) into alternative methods of firefighting on Royal Navy minor warship machinery spaces with the safety of personnel considered a key requirement. The study identified five alternatives to CO2 available on the market. One particular aerosol fire suppression system was found to be superior to the others for application in small craft. This system is not toxic, non-ozone depleting and leaves almost no residue after application to the affected space, enabling re-entry (provided that the space has been ventilated to remove the products of combustion). The study concluded that traditional methods of fire suppression should be reconsidered across all small craft due to the health and safety issues associated with CO2 and the availability of improved alternatives. This paper considers the use of traditional firefighting systems on naval vessels in light of 21st century health and safety regulations. An assessment of current fire extinguishing agents is presented followed by a case study to determine the most appropriate solution for a minor warship concept with a particular aerosol system being justified as the preferred option. The paper also considers if the same conclusions would be reached for major warships or if the difference in scale results in an alternative solution.

Accounting for Bonds With Accrued Interest in Conformity With Brokers' Valuation Formulas

1999 ◽  
Vol 14 (2) ◽  
pp. 233-253 ◽  
Author(s):  
Mark Rusbarsky ◽  
David B. Vicknair
Keyword(s):  
Balance Sheet ◽  
Fair Value ◽  
Simple Approach ◽  
Present Value ◽  
Valuation Methods ◽  
Interest Payments ◽  
Actual Price ◽  
Spreadsheet Application

This article explains how to apply brokers' valuation methods to accounting for bonds when interest payments do not coincide with settlement or balance sheet dates. We show how to calculate a bond's present value on these dates using a simple approach that conforms with the method used by brokerage institutions to compute the bond's “actual price.” We then clarify how a broker subtracts accrued interest from this actual price to arrive at the quoted price, and how this quoted price relates to the bond's carrying amount and “fair value” (per SFAS Nos. 107, 115 and 124). We also precisely compute the change in a bond's carrying amount over fractional periods after settlement and around balance sheet dates. Finally, we demonstrate how to integrate these refinements into intermediate textbook illustrations. Throughout, we provide instructions for computing bond valuations using spreadsheet application functions.

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