Search results

1 – 10 of over 3000
To view the access options for this content please click here
Article
Publication date: 1 July 1990

Harold M. George

The use of chlorfluorocarbons (CFC) propellants are reputed to cause depletion of the ozone layer in the upper atmosphere, whilst the use of hydrocarbons (propane/butane…

Abstract

The use of chlorfluorocarbons (CFC) propellants are reputed to cause depletion of the ozone layer in the upper atmosphere, whilst the use of hydrocarbons (propane/butane blends) and carbon dioxide (CO2) are likewise reputed to add to the suspected greenhouse effect.

Details

Pigment & Resin Technology, vol. 19 no. 7
Type: Research Article
ISSN: 0369-9420

To view the access options for this content please click here
Article
Publication date: 1 February 1972

R.D. Singer, G.T. Williams and G. Angerer

The results of research conducted into air‐dried terpolymer films shows the effect of various factors on degradation under accelerated weathering conditions

Abstract

The results of research conducted into air‐dried terpolymer films shows the effect of various factors on degradation under accelerated weathering conditions

Details

Pigment & Resin Technology, vol. 1 no. 2
Type: Research Article
ISSN: 0369-9420

To view the access options for this content please click here
Article
Publication date: 1 November 1963

Since world attention has been focussed on the quality and safety of drugs, thought is being given to improving the methods of dealing with this branch of control under…

Abstract

Since world attention has been focussed on the quality and safety of drugs, thought is being given to improving the methods of dealing with this branch of control under the Food and Drugs Act, 1955. This work is entirely different to the several projects now being undertaken, such as the Government‐sponsored “safety committee” dealing with the clinical testing of new drugs before sale; this deals mainly with toxicity trials, therapeutic efficiency and adverse reactions and is designed to prevent such catastrophies as the recent drug‐induced deformities of babies. The recently proposed scheme of the Association of British Pharmaceutical Industry for an advisory centre had similar objectives.

Details

British Food Journal, vol. 65 no. 11
Type: Research Article
ISSN: 0007-070X

To view the access options for this content please click here
Article
Publication date: 1 February 1967

ANDREW MUIR

To the outsider, the buyer's decision taking processes would seem to be highly empirical with little use being made of the scientific management techniques that are now…

Abstract

To the outsider, the buyer's decision taking processes would seem to be highly empirical with little use being made of the scientific management techniques that are now available. Since the potential savings must be very high, it is very important to ask ourselves why operational research in particular has made so little impact.

Details

Management Decision, vol. 1 no. 2
Type: Research Article
ISSN: 0025-1747

To view the access options for this content please click here
Article
Publication date: 1 April 1973

From time to time we have had occasion to refer to earnings per share in terms of the new ‘imputation’ system of company taxation. This is a somewhat complex system and we…

Abstract

From time to time we have had occasion to refer to earnings per share in terms of the new ‘imputation’ system of company taxation. This is a somewhat complex system and we have asked our Financial Correspondent to explain in some detail what is involved. In attempting an explanation, he has found it useful to compare the present system not only, as others have done, with the preceding corporation tax system inaugurated by Mr Callaghan in his 1965 Budget, but also with the earlier profits‐cum‐ income tax system. There are of course many other systems of company taxation, but for purposes of explanation a comparison of the three systems — profits‐plus‐income tax, the Callaghan‐type corporation tax, and the imputation system—is sufficient.

Details

Retail and Distribution Management, vol. 1 no. 4
Type: Research Article
ISSN: 0307-2363

To view the access options for this content please click here
Book part
Publication date: 11 June 2021

Christy M. K. Cheung, Dimple R. Thadani and Zach W. Y. Lee

With growing interest in the uses of hedonic technologies and gamification in system design, the concept of cognitive absorption (CA) has become increasingly salient in…

Abstract

With growing interest in the uses of hedonic technologies and gamification in system design, the concept of cognitive absorption (CA) has become increasingly salient in the information systems literature. However, little effort has been made to evaluate the research status and consolidate the current literature findings. To fill these research gaps, the authors conducted a literature review on CA. The authors then proposed an integrative framework that summarises the key elements of and variables related to CA and their relationships. The major findings of the study are discussed, and an agenda for future research is proposed.

Details

Information Technology in Organisations and Societies: Multidisciplinary Perspectives from AI to Technostress
Type: Book
ISBN: 978-1-83909-812-3

Keywords

To view the access options for this content please click here
Article
Publication date: 1 April 1967

J.D. Smith

The effects of a number of metals and alloys on the thermal stability of Avtur 50 have been evaluated from ASTM‐CRC and high temperature coker tests. The materials tested…

Abstract

The effects of a number of metals and alloys on the thermal stability of Avtur 50 have been evaluated from ASTM‐CRC and high temperature coker tests. The materials tested are used in current aircraft fuel systems or are possible alternatives for fuel systems of supersonic aircraft where they will be in contact with hot fuel. The alloys currently used in aircraft fuel systems have been classified and their probable effects on the stability of hot fuel listed. A number of the materials affected stability adversely, particularly alloys containing significant amounts of copper, and the use of these should be avoided. The pick‐up of copper by Avtur 50 at ambient temperature from alloys such as brass and gun‐metal has also been investigated. The results indicated that sufficient copper to affect thermal stability adversely is readily picked up from these alloys.

Details

Aircraft Engineering and Aerospace Technology, vol. 39 no. 4
Type: Research Article
ISSN: 0002-2667

To view the access options for this content please click here
Article
Publication date: 1 December 1974

J.D. Talati and J.M. Pandya

The inhibition of corrosion of Al‐Cu (4%) alloy B26S in decinormal solutions of phosphoric acid by different amines has been studied. The efficiency of the inhibitors…

Abstract

The inhibition of corrosion of Al‐Cu (4%) alloy B26S in decinormal solutions of phosphoric acid by different amines has been studied. The efficiency of the inhibitors increases in the order: triethylamine, di‐cyclohexylamine, diethylamine, cyclohexylamine, di‐n‐propylamine, isopropylamine, ethylenediamine, trimethylamine, n‐butylamine, dimethylamine, ethylamine, hexamine, n‐propylamine, methylamine. At constant acid concentration, the inhibitor efficiency increases with increase in the concentration of the inhibitor whereas at constant inhibitor concentration the efficiency decreases with increase in the concentration of the acid. Very little correlation appears to exist between either the pKb values or the molecular weight and the extent of inhibition. Maximum inhibition is achieved in those cases where the pH of the inhibited solution lies in the non‐corrosive range (4.5–8.5).

Details

Anti-Corrosion Methods and Materials, vol. 21 no. 12
Type: Research Article
ISSN: 0003-5599

To view the access options for this content please click here
Article
Publication date: 1 February 1958

IN A PAPER ON THE ABOVE SUBJECT presented to The Institute of Petroleum in January by G. A. Dickens and W. B. Broadbent (both of Mobil Oil Co. Ltd.), these authors said…

Abstract

IN A PAPER ON THE ABOVE SUBJECT presented to The Institute of Petroleum in January by G. A. Dickens and W. B. Broadbent (both of Mobil Oil Co. Ltd.), these authors said that the lubrication problems arising from electrification of railway locomotives are not great and although there may be no entirely new lubrication problems, diesel traction on a large scale is new to the U.K. and in this field, service life between overhauls is very dependent on the quality of crankcase lubricating oil. Dividing diesel traction into three categories, namely shunters, railcars, and main line locomotives, they discussed the differing lubrication requirements of each. Shunting diesel engines are mainly 600/800 r.p.m. units developing up to 4,000 h.p. ; main line and mixed traffic locos utilise diesel units of 600/1200 r.p.m. developing from 800 to 2,000 h.p.; railcar and light weight trains use engines of 1,500/2,000 r.p.m. developing up to 250 h.p.

Details

Industrial Lubrication and Tribology, vol. 10 no. 2
Type: Research Article
ISSN: 0036-8792

To view the access options for this content please click here
Article
Publication date: 1 December 1974

IN recent years there has been a revival of interest in aerostatic aircraft. The natural advantages of “displacement type” flying machines have been often repeated but…

Abstract

IN recent years there has been a revival of interest in aerostatic aircraft. The natural advantages of “displacement type” flying machines have been often repeated but particular emphasis has been made on economy and safety. The prime reason is that power is required for propulstion and control and not for aerodynamic lift.

Details

Aircraft Engineering and Aerospace Technology, vol. 46 no. 12
Type: Research Article
ISSN: 0002-2667

1 – 10 of over 3000