A New Cold-Process Roofing System: Description and Performance

2009 ◽  
pp. 3-3-10 ◽  
Author(s):  
DA Davis ◽  
MP Krenick
Keyword(s):  
System Description ◽  
And Performance ◽  
Roofing System

scholarly journals The Hvee 14C System at Groningen

Radiocarbon ◽  
1995 ◽  
Vol 37 (2) ◽  
pp. 649-656 ◽  
Author(s):  
Andreas Gottdang ◽  
Dirk J. W. Mous ◽  
Johannes Van Der Plicht
Keyword(s):  
Mass Spectrometry ◽  
High Throughput ◽  
High Voltage ◽  
Accelerator Mass Spectrometry ◽  
Performance Measurements ◽  
System Description ◽  
Accelerator Mass Spectrometer ◽  
And Performance ◽  
High Voltage Engineering ◽  
New Generation

Since May 1994, a new-generation accelerator mass spectrometer (AMS) has been fully operational at the Centre for Isotope Research in Groningen, The Netherlands. The fully automated and high-throughput accelerator mass spectrometry (AMS) system, manufactured by High Voltage Engineering Europa (HVEE) is dedicated to radiocarbon analysis. The HVEE 4130 14C AMS is able to analyze up to 3000 samples per year. The system is characterized by simultaneous transport of all three isotopes (12C, 13C, 14C) and 14C analysis with a precision below 0.5 pMC and a daily stability below 0.5 pMC. We present here a system description together with stability and performance measurements.

scholarly journals The Quaternary Isotope Laboratory Thermal Diffusion Enrichment System: Description and Performance

Radiocarbon ◽  
1979 ◽  
Vol 21 (2) ◽  
pp. 139-164 ◽  
Author(s):  
Pieter M Grootes ◽  
Minze Stuiver
Keyword(s):  
Gas Exchange ◽  
Thermal Diffusion ◽  
Total Sample ◽  
Effective Length ◽  
Sample Mass ◽  
System Description ◽  
Wire Temperature ◽  
In Series ◽  
Equilibrium Separation ◽  
And Performance

The thermal diffusion enrichment system of the Quaternary Isotope Laboratory consists of 23 hot wire columns of 3m effective length combined to 2 separate systems of 3 and 3 separate systems of 4 columns at the top, each system in series with 1 bottom column. From ≈ 130 L NTP of CO (∼ 65g of carbon) it produces ≈ 8 L NTP of CO (~ 4g of carbon) enriched in12C18O by a factor 6 to 7 and in14C16O by a factor 7 to 8 in about 5 weeks. For12C18O the system has a theoretical equilibrium separation factor of about 250 and a theoretical equilibrium enrichment of about 15. For14C16O these values are 1300 and 16, respectively. The dependence of thermal diffusion transport on gas exchange between top and bottom section and between columns and reservoirs and on wire temperature is given. Forced gas exchange and a higher wire temperature gave a more rapidly increasing enrichment without substantially increasing its final value of 6 to 7 for12C18O. A comparison with the Groningen enrichment system shows that the two systems behave very similarly and that not the system geometry but individual column parameters and the ratio total sample mass/enriched sample mass are the dominant factors determining the enrichment.

Control system description and performance of a phased array telescope

1990 ◽  
Author(s):  
Charles A. Tipton ◽  
Joseph A. Meinhardt ◽  
Mohammad Jamshidi
Keyword(s):  
Control System ◽  
Phased Array ◽  
System Description ◽  
And Performance

Photon Counting Reticon System-Description And Performance

1982 ◽  
Author(s):  
A. R. Jorden ◽  
P. D. Read ◽  
I. G. vanBreda
Keyword(s):  
Photon Counting ◽  
System Description ◽  
And Performance

An Automatic Car Heater System-Description and Performance Prediction

1968 ◽  
Vol 183 (1) ◽  
pp. 125-135
Author(s):  
A. G. Plackett
Keyword(s):  
Performance Prediction ◽  
Digital Computer ◽  
System Parameter ◽  
Operating Conditions ◽  
Comfort Level ◽  
System Description ◽  
Wide Range ◽  
System Components ◽  
Overall Performance ◽  
And Performance

The objective of the system is to control the car heater temperature to ensure an optimum comfort level, without the need for periodic adjustment, despite variations in ambient temperature and vehicle usage. Reasons for choosing a particular type of system are explained. The operation is analysed, and expressed in terms of an equation. Difficulties in solution due to non-linear terms are overcome with the aid of a digital computer. Test data on the system components and vehicle characteristics are used in the computer program to obtain a prediction of the accuracy of temperature control over a wide range of operating conditions. Predicted performance is compared with actual road tests results for an installation. Design optimization is facilitated by using the computer to examine the effect of system parameter changes on the overall performance.

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