The Ultra-Rapid Testing of Rubber. The Testing of its Oxidizability in One Quarter of an Hour

1939 ◽  
Vol 12 (3) ◽  
pp. 568-575
Author(s):  
Ch Dufraisse ◽  
J. Le Bras
Keyword(s):  
Present State ◽  
The Other ◽  
Testing Time ◽  
Control Laboratory ◽  
Rapid Testing ◽  
Oxidation Curve ◽  
Resistance To Oxidation

Abstract It is hardly necessary to go into further detail to demonstrate the great advantages of such a test when used in a practical way. In the control laboratory, it will supplement and confirm the various other routine tests and, most important, immediately detect an error which the other tests will not do, particularly the omission, insufficiency or incomplete distribution of antioxygen. It will also reveal the presence of harmful impurities. For specifications and in manufacture, it will enable the article itself to be tested, either by removing a small piece or by providing a cavity for this purpose in the mould. Of course it is not necessary to limit the testing time to a quarter of an hour. If greater differences in the manometric levels are desired, the oxidation curve may be continued for a longer period, one hour, for example. Finally this oxidizability test at 120° C. would appear to fulfill the requirements of rapidity and precision of control testing, at least in the present state of stability of rubber products. Only in case of greatly increased resistance to oxidation would it be necessary to prolong the test for more than one quarter of an hour.

scholarly journals Assessing a Linear Nanosystem's Limiting Reliability from its Components

2008 ◽  
Vol 45 (03) ◽  
pp. 879-887 ◽  
Author(s):  
Nader Ebrahimi
Keyword(s):  
Present State ◽  
Size Range ◽  
Two Dimensions ◽  
The Other ◽  
One Dimension ◽  
Present Moment ◽  
One Dimensional ◽  
The One ◽  
Fixed Moment ◽  
Nanosized Systems

Nanosystems are devices that are in the size range of a billionth of a meter (1 x 10-9) and therefore are built necessarily from individual atoms. The one-dimensional nanosystems or linear nanosystems cover all the nanosized systems which possess one dimension that exceeds the other two dimensions, i.e. extension over one dimension is predominant over the other two dimensions. Here only two of the dimensions have to be on the nanoscale (less than 100 nanometers). In this paper we consider the structural relationship between a linear nanosystem and its atoms acting as components of the nanosystem. Using such information, we then assess the nanosystem's limiting reliability which is, of course, probabilistic in nature. We consider the linear nanosystem at a fixed moment of time, say the present moment, and we assume that the present state of the linear nanosystem depends only on the present states of its atoms.

Neolithic Pottery and other Remains from Pangbourne, Berks., and Caversham, Oxon

1929 ◽  
Vol 6 (1) ◽  
pp. 30-39 ◽  
Author(s):  
Stuart Piggott
Keyword(s):  
Present State ◽  
The Other ◽  
Neolithic Period ◽  
Human Skeleton ◽  
Animal Bones ◽  
Tennis Court ◽  
Made In ◽  
Neolithic Pottery

In the present state of our knowledge of the Neolithic period in England, and especially as regards its pottery, any light that can be thrown upon it is welcome, and it is on that account that I have brought before the Society a report on two discoveries of Neolithic remains: at Pangbourne, Berks., and Caversham, Oxon.It is greatly to be regretted that owing to the circumstances of the discovery accurate observations could not be made. In May, 1928, workmen were engaged in levelling ground to make a tennis court, at “Farmhili,” Courtlands Hill, Pangbourne, and in doing so came upon, and, as is unhappily so often the case, disturbed and partly smashed a human skeleton, other animal bones, of which a few only survive, and a large bowl of coarse pottery, definitely of Neolithic type. It would seem that when found the bowl was imore or less complete, but Mr. G. W. Smith, of Reading, who visited the spot the day after the discovery, was only able to find about two-thirds of the vessel, in fragments, on the rubbish heaps of excavated material. These fragments, together with the other remains, were presented by the owner of the land, Lt.-Com. W. S. Macilwaine, R.N., to the Reading Museum, where the writer had the opportunity of examining them.

scholarly journals I.—Notes on the Phylogeny of the Graptolites

1895 ◽  
Vol 2 (12) ◽  
pp. 529-539 ◽  
Author(s):  
H. A. Nicholson ◽  
J. E. Marr
Keyword(s):  
Present State ◽  
The Other ◽  
Other Hand ◽  
The Family ◽  
The Future ◽  
Geological Magazine

Since the remarkable paper by Professor Lapworth “On an Improved Classification of the Rhabdophora” was published in the Geological Magazine for 1873, a great deal of fresh information has been gathered as to these interesting fossils; but the classification given in that paper, though to some extent confessedly artificial, is still generally adhered to. Observations made by the authors in recent years lead them to suppose that that classification will in the future undergo considerable modification; but in the present state of our knowledge it serves a purpose so useful, that it is not our intention to propose any immediate change in it. Our object, on the other hand, is to bring forward certain conclusions which we have independently reached, and which will, we believe, enhance the value of Graptolites to the stratigraphical geologist, and lead to results important to the biologist. Our conclusions are based upon an examination of a large number of forms generally referred to the family Dichograptidæ; but, as we propose very briefly to indicate, they affect the relationships of Graptolites belonging to other families also.

1. On the Philological Genius and Character of the Neo-Hellenic Dialect

1875 ◽  
Vol 8 ◽  
pp. 31-31
Author(s):  
Blackie
Keyword(s):  
Middle Ages ◽  
Present State ◽  
Historical Review ◽  
Popular Literature ◽  
The Other ◽  
Greek Language ◽  
Modern Language ◽  
The Past ◽  
History Of ◽  
Of Greece

The Author showed by a historical review of the fortunes of Greece, through the Middle Ages, and under the successive influences of Turkish conquest and Turkish oppression, how the Greek language had escaped corruption to the degree that would have caused the birth of a new language in the way that Italian and the other Roman languages grew out of Latin. He then analysed the modern language, as it existed in current popular literature before the time of Coraes, that is, from the time of Theodore Ptochoprodromus to nearly the end of the last century, and showed that the losses and curtailments which it had unquestionably suffered in the course of so many centuries, were not such as materially to impair the strength and beauty of the language, which in its present state was partly to be regarded as a living bridge betwixt the present and the past, and as an altogether unique phenomenon in the history of human speech.

scholarly journals Variation of positiveness to enhance testing of specimens during an epidemic

2020 ◽  
Author(s):  
Usama Kadri
Keyword(s):  
Disease Management ◽  
Suggested Method ◽  
Testing Time ◽  
Rapid Testing ◽  
False Negatives ◽  
Numerical Tests ◽  
Specific Configuration ◽  
And Control ◽  
Natural Virus

Rapid testing of appropriate specimens from patients suspected for a disease during an epidemic, such as the current Coronavirus outbreak, is of a great importance for the disease management and control. We propose a method to enhance processing large amounts of collected samples. The method is based on mixing samples in testing tubes in a specific configuration, as opposed to testing single samples in each tube, and accounting for natural virus amounts in infected patients from variation of positiveness in test tubes. To illustrate the efficiency of the suggested method we carry out numerical tests for actual scenarios under various tests. Applying the proposed method enhances the number of tests by order of magnitudes, where all positives are identified with no false negatives, and the effective testing time can be reduced drastically even when the uncertainty in the test is relatively high.

Investigation Into Cavitation Erosion Pits

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
A. Abouel-Kasem ◽  
A. Ezz El-Deen ◽  
K. M. Emara ◽  
S. M. Ahmed
Keyword(s):  
Stainless Steel ◽  
Cavitation Erosion ◽  
Pure Aluminum ◽  
The Other ◽  
304 Stainless Steel ◽  
Testing Time ◽  
Limited Effect ◽  
Fatigue Process

Cavitation erosion pits and their effects on erosion progression were investigated in detail for SUS 304 stainless steel, α+β brass (60/40), and pure aluminum (Al-99.999 and Al-99.92) by means of vibratory erosion. Two kinds of erosion pits were found on the specimen surfaces, one by microjet impact and the other by shockwave blow. Systematic observations of the feature of microjet-pits with the testing time showed that the sizes and shapes of microjet-pits did not change at all and such pits scarcely played an important role in developing the erosion. Moreover, the feature morphology of eroded surfaces, and dislodged particles and their large sizes revealed that microjet-pits had a limited effect on erosion and that the predominant failure was a fatigue process.

Some Observations on the Phenomena of Life and Mind

1868 ◽  
Vol 13 (64) ◽  
pp. 437-449
Author(s):  
Robert Dunn
Keyword(s):  
Nervous System ◽  
Present State ◽  
The Other ◽  
Mental Life ◽  
States Of Consciousness ◽  
Physical Forces ◽  
Material Conditions ◽  
Living Organisms ◽  
The One

Life and mind, in their abstract nature or essence alike inscrutable to us, are problems which belong to the same category; for, in this world, we know nothing of life apart from an organism, and we have no manifestations of mind independently of a brain and nervous system. Here living organisms are required for the display of the vital phenomena, and a brain and nervous system for the manifestations of mind. Life has accordingly been defined as “the collective expression for a series of phenomena which take place exclusively in bodies that are organized,” and “mind as the functional manifestations of the living brain.” But then, and at the outset, it is to be remembered that in affirming sensation, emotion, thought, and volition to be functions of the nervous system, what is really maintained is this, that the vesicular matter of the encephalic ganglia furnishes the material conditions—the medium through which these mental phenomena are made manifest in this life. It may indeed be asked, Are not the physical forces of external nature, which underlie all vital phenomena, and the changing states of consciousness which constitute our mental life, as inscrutable to us in their nature or essence as are life and mind ? and it must be conceded that they are. Matter and force are coexistent, and are correlative. Nor can we conceive of the one but in association with, by, and through the other, any more than we can conceive of life, in our present state of existence, apart from an organism, or of thought independently of a living brain.

scholarly journals Morphology, Modes of Behavior, and Measures of Market Power: A Framework for Evaluating the Impact of Industrialization of Southern Agriculture on Markets and Market Structure

1970 ◽  
Vol 2 (1) ◽  
pp. 41-45
Author(s):  
Richard A. King
Keyword(s):  
Market Structure ◽  
Market Power ◽  
Empirical Analysis ◽  
Present State ◽  
Model Building ◽  
The Other ◽  
Agricultural Industrialization ◽  
The Arts ◽  
New Ideas ◽  
The Impact

In spite of the volume of literature produced over the years reflecting concern over the present state of the arts, the situation is likely to continue. However, there are several new ideas that offer some promise for improving our understanding and ability to project new relationships in the agribusiness sector of the Southern region.Although the title of this article implies a one-way set of forces working from agricultural industrialization to market structure, some of our colleagues regard this relationship as a two way process with forces at work in each sector having strong impacts on the other. It is these interdependencies that make the task of model building so difficult and empirical analysis so complex.

The Organisation of African Unity: A Progress Report

1966 ◽  
Vol 4 (2) ◽  
pp. 135-153 ◽  
Author(s):  
John Markakis
Keyword(s):  
Present State ◽  
Early Stage ◽  
Progress Report ◽  
The Other ◽  
African Unity ◽  
Other Hand

The Organisation of African Unity is now three years old. In view of the nature of both its scope and its goals, it would obviously be premature to attempt an evaluation of this organisation at such an early stage. On the other hand, the O.A.U. has grown precociously since its birth in May 1963, and the time is ripe for a description of its rapidly multiplying organs, and for some preliminary observations of the multifarious activity in which they have been engaged. To state that the O.A.U. is still in the cradle stage of its development is to emphasise the obvious. It is hardly surprising also that it should suffer the pains of growth, which are likely to be rather severe in the case of a scheme so ambitiously conceived. These facts must be kept in mind while reviewing the O.A.U. at its present state of development.

Evolution of Case in Ossetic

2010 ◽  
Vol 14 (2) ◽  
pp. 287-322 ◽  
Author(s):  
Oleg Belyaev
Keyword(s):  
Present State ◽  
The Other ◽  
Exact Nature ◽  
External Influence ◽  
Systematic Comparison ◽  
Case System

AbstractOssetic sets itself apart from the other New Iranian languages by having a relatively elaborate system of nine cases. Since most of them are relatively late innovations, and only four cases (Nom., Gen, Abl., and Iness.) can be traced back to Proto-Iranian, many scholars tend to ascribe the development of the case system to Caucasian influence. The exact nature of this influence, however, has never been demonstrated. The aim of this paper is, first, to not only reconstruct the etymologies of Ossetic cases, but also to provide a chronology of how the case system developed. The second aim pursued here is to give a systematic comparison of the case system of Ossetic with those of the neighbouring languages and to determine if there is any external influence on the case system and, if so, what languages this influence came from. I conclude that Ossetic developed from a case system identical to those of Khotanese and Sogdian towards the present state under the influence of contact with Georgian and, later, with Turkic and Vaynakh languages. In the process of the discussion, I also argue that two new cases, the Directive and Regressive, are undergoing grammaticalisation in contemporary Ossetic.

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