Decomps and De Caumont
THERE seems to be little point in describing the ’product' which is the subject of this thesis since the Sud‐Aviation S.E.210 Caravelle twin‐jet, medium‐range aircraft is known…
Abstract
THERE seems to be little point in describing the ’product' which is the subject of this thesis since the Sud‐Aviation S.E.210 Caravelle twin‐jet, medium‐range aircraft is known the world over.
Vinod Nistane and Suraj Harsha
In rotary machines, the bearing failure is one of the major causes of the breakdown of machinery. The bearing degradation monitoring is a great anxiety for the prevention of…
Abstract
Purpose
In rotary machines, the bearing failure is one of the major causes of the breakdown of machinery. The bearing degradation monitoring is a great anxiety for the prevention of bearing failures. This paper aims to present a combination of the stationary wavelet decomposition and extra-trees regression (ETR) for the evaluation of bearing degradation.
Design/methodology/approach
The higher order cumulants features are extracted from the bearing vibration signals by using the stationary wavelet decomposition (stationary wavelet transform [SWT]). The extracted features are then subjected to the ETR for obtaining normal and failure state. A dominance level curve build using the dissimilarity data of test object and retained as health degradation indicator for the evaluation of bearing health.
Findings
Experiment conducts to verify and assess the effectiveness of ETR for the evaluation of performance of bearing degradation. To justify the preeminence of recommended approach, it is compared with the performance of random forest regression and multi-layer perceptron regression.
Originality/value
The experimental results indicated that the presently adopted method shows better performance for detecting the degradation more accurately at early stage. Furthermore, the diagnostics and prognostics have been getting much attention in the field of vibration, and it plays a significant role to avoid accidents.
Details
Keywords
Heat‐ and corrosion‐resistant alloy. At elevated temperature the creep characteristic of structural alloys is frequently of importance, and also their resistance to corrosion and…
Abstract
Heat‐ and corrosion‐resistant alloy. At elevated temperature the creep characteristic of structural alloys is frequently of importance, and also their resistance to corrosion and oxidation, and, for example, by adding cobalt to an iron‐chromium‐nickel alloy, tungsten being present, the hot‐strength characteristic of the corrosion‐resistant alloy is enhanced. Furthermore, molybdenum, titanium and columbium are absent in the new alloy. A typical heat‐and corrosion‐resistant alloy is quoted (in per cent) as: (0.4–0.6) carbon, (0.5–2) silicon, (34–38) nickel, (25–28) chromium, (3–7) tungsten, (10–20) cobalt and the balance iron. (920,137— American Brake Shoe Co., U.S.A.)
The death-positive movement can be described as a de-centralised contemporary social movement originating and operating predominantly in the global West, specifically the United…
Abstract
The death-positive movement can be described as a de-centralised contemporary social movement originating and operating predominantly in the global West, specifically the United States, connecting death workers, educators, artists, journalists, etc., and geared towards encouraging open dialogue about death and dying. It has succeeded in capturing significant media attention over the last few years and is largely driven by its strong social media presence. This chapter looks at ‘playfulness’ within the death-positive movement. Examining the dimension of ‘playfulness’ addresses the affective aspect of communication that in this movement is inseparable from the message. First, the author investigates the aesthetics of representation through death-positive merchandise, produced and advertised by The Order of the Good Death’s (subsequently – The Order) core members. Second, the author considers some of the cultural output produced under the umbrella of death-positivity, but not by the core movement members, specifically taking the first video game to be explicitly marketed as death-positive – A Mortician’s Tale (Laundry Bear Games, 2017) as a case study. Finally, the author analyses the role of entertainment value in the movement’s leaders’ discourse on death, taking leader of The Order Caitlin Doughty’s playful rhetoric on her YouTube channel, Twitter profile, and Instagram pages. The manifesto, found on the movement’s official website (http://www.orderofthegooddeath.com/) encourages its participants to break the ‘culture of silence’ around death, indicating that the whole premise of the movement is based on the supposed presence of death denial in Western countries. Ultimately, the author argues that by eliciting playfulness, this challenge to the social climate becomes a somewhat jovial and enjoyable endeavour and generates response from outside the movement.
Details
Keywords
SOCIAL scientists have not yet been able to formulate any general laws about behaviour in industry that are capable of broad application. In recent years, however, they have made…
Abstract
SOCIAL scientists have not yet been able to formulate any general laws about behaviour in industry that are capable of broad application. In recent years, however, they have made many useful case studies of which the one just published by the Department of Scientific and Industrial Research is typical. It is an approach to the problem which can do much to increase the understanding of the way in which people react to common industrial situations.
THERE have been official links for the past twelve years between the Institute of Incorporated Work Study Technologists and Time and Motion Study. Many of its members have been…
Abstract
THERE have been official links for the past twelve years between the Institute of Incorporated Work Study Technologists and Time and Motion Study. Many of its members have been valued contributors to our pages and the Institute has had editorial space for its news.
Future legislation relating to the control of the national milk supply formed the subject of discussion in the House of Commons on the 5th March. Although no new points were…
Abstract
Future legislation relating to the control of the national milk supply formed the subject of discussion in the House of Commons on the 5th March. Although no new points were brought out, the need for fresh legislation was emphasised in this discussion, especially the need for a general Act that would, while giving the central authority increased powers, do away “with the piecemeal, voluntary, and local enactments at present in existence. It is evident that if any radical change in the present system is to be effective it must not only be general as regards this country, but it must also be imperial” and international; inasmuch as it must deal both with the supplies that are produced at home and with those imported from abroad. It would obviously be in the highest degree unfair to the English farmer to make his stock, workpeople, and premises liable to the frequent expert inspection demanded, and, at the same time, to allow milk to enter this country from abroad without the application of an equally rigorous inspection on this side, and without some form of guarantee from the government of the country of origin. In all matters connected with food supply improved methods of preserving and sterilising as well as increased facilities for international commerce have resulted, as time has gone on, in a large number of food preparations of all kinds being thrown upon the markets. The trade in cheese and butter substitutes as well as that in canned and otherwise preserved meats, and the supply of cereal preparations, afford well known instances, and the milk trade is not singular in the circumstance that a considerable and increasing amount of, milk is treated in various ways, both at home and abroad, for consumption in this country.