Human supervisory control behavior: Verification of a cybernetic model

River regime based on sediment transport concepts

Rational regime relationships for the width, depth and slope of a river in equilibrium are developed using the Ackers and White sediment transport formula and the White, Paris and Bettess friction relationships, together with a principle of maximum sediment transporting capacity. This concept of maximising the sediment transporting capacity is...

Modelling the human operator's supervisory behavior

A New General Method for Predicting the Frictional Characteristics of Alluvial Streams

A new method for predicting the frictional resistance of alluvial channels is developed using experimental data. The method is exhaustively tested on an extensive range of field and flume data and compared with the three existing methods due to Einstein and Barbarossa, Engelund and Raudkivi

Reflection and Transmission Characteristics of Porous Rubble-Mound Breakwaters

This report presents the results of a study of the reflection and transmission characteristics of porous rubble-mound breakwaters. An attempt was made at making the procedures entirely self-contained by introducing empirical relationships for the hydraulic characteristics of the porous material and by establishing experimentally an empirical...

Sediment Transport: an Appraisal of Available Methods: VOLUME 1: Summary of Existing Theories: VOLUME 2: Performance of Theoretical Methods when Applied to Flume and Field Data

In 1972 Ackers and White (Refs 24 and 25) proposed a new sediment transport theory and tested the theory against f1ume data. This data consisted of about 1000 measurements with particle sizes in the range 0.04 < D(mm) < 5 and sediment specific gravities in the range 1.07 < s < 2.65. Subsequent phases in this investigation have included (i) the...

A survey of random methods for parameter optimization

Seakeeping prediction for USCG Hard Chine Patrol Boats

Spontaneous ignition of kerosine (AVTUR) fuel vapour: the effect of vessel size

This report is an extension of earlier work with a 4" diameter cylinder to 1" , 7", 10" and 18" diameter vessels with the object of assesslng the effect of temperature, pressure and vessel size on the spontaneous ignition of Aviation Kerosene (AVTUR). The minimum spontaneous ignition temperature decreases with increase in vessel size from 258°C...

Temperature stable fluids and lubricants: IX. Sym-bis (3-hydroxy-2,2-dimethylpropyl) tetramethyldisiloxane

The synthesis of sym-bis(3-hydroxy-2,2-dimethylpropyl)tetramethyldisiloxane, used earlier for the preparation of a phosphate ester, is described. Same unsuccessful routes to this compound involving the preparation of novel intermediates are also discussed.

Perfluoroplyphenylenes from pentafluorophenylmagnesium bromide

This Note is the text of a paper given at the XIXth International Congress of Pure and Applied Chemistry, London, July 1963. Decomposition of pentafluorophenylmagnesium bromide in tetrahydrofuran gives fluoropolyphenylenes , of relatively high molecular weight; however their structure is uncertain and they always contain bromine. Decomposition...

Spontaneous ignition of kerosene (avtur) fuel vapour within a 4 inch cylindrical vessel

Further laboratory tests using a 4 inch diameter stainless steel cylinder 12 inches long have been done to explore the risk of spontaneous ignition in uniformly heated zones containing Avtur fuel vapour. The effects of temperature, pressure and mixture strength have been investigated over ranges applicable to supersonic aircraft and missiles, a...

Organo-magnesium and -lithium derivatives in organophosphorus chemistry: A literature survey

Some uses of magnesium and lithium, and their organo-derivatives, in organophosphorus chemistry have been reviewed. Emphasis has been laid on published work relating to the ease of displacement of phosphorus ester groupings by these organometallic derivatives. The survey also covers organophosphorus derivatives of these metals. Forty four...