The Influence of Vulcanization on Oxidizability in Relation to Aging. A Preliminary Study

1938 ◽  
Vol 11 (2) ◽  
pp. 282-309 ◽  
Author(s):  
Charles Dufraisse ◽  
André Étienne
Keyword(s):  
The Past ◽  
Preliminary Study ◽  
The Many

Abstract Because of its preliminary character, the present investigation does not admit any definite conclusions. Rather, by bringing out clearly the various complications which arise in studying the oxidizability of rubber, especially when the aim is to establish a parallelism between oxidizability and the ill-defined phenomenon of aging, the investigation has shown the many difficulties in general involved in the problem. These complications are to a certain extent attributable to the nature of the phenomenon itself which has been measured, i. e., the oxidizability; but for the most part they owe their origin to the nature of the substance studied, and especially to its heterogeneous character. For these reasons the uncertainty in the results is increased by vulcanization, and the more vigorous the treatment, the greater is this uncertainty. As a result, considerable fluctuation in the measurements occurred. This is the reason why, in the past as well as now, so much emphasis has has been laid on the advisability of considering as significant only relatively large differences in measurements when drawing conclusions from them. With these reservations in mind, the facts which emerge from this opening work may be reviewed briefly. First of all, it may be stated that, as a principle, the higher the percentage of combined sulfur, the greater is the oxidizability of rubber. In other words, it is, in a different guise, the principle accepted by the majority of technologists, and which Martin expressed in a particularly clear fashion, viz., that the lower its state of vulcanization, the more stable is rubber.

On Future Directions in Pathology

1982 ◽  
Vol 40 ◽  
pp. 274-277
Author(s):  
Benjamin F. Trump ◽  
Irene K. Berezesky ◽  
Raymond T. Jones
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Clinical Pathology ◽  
Future Directions ◽  
Diagnostic Pathology ◽  
The Past ◽  
Transmission Electron ◽  
Organ Systems ◽  
The Many

The role of electron microscopy and associated techniques is assured in diagnostic pathology. At the present time, most of the progress has been made on tissues examined by transmission electron microscopy (TEM) and correlated with light microscopy (LM) and by cytochemistry using both plastic and paraffin-embedded materials. As mentioned elsewhere in this symposium, this has revolutionized many fields of pathology including diagnostic, anatomic and clinical pathology. It began with the kidney; however, it has now been extended to most other organ systems and to tumor diagnosis in general. The results of the past few years tend to indicate the future directions and needs of this expanding field. Now, in addition to routine EM, pathologists have access to the many newly developed methods and instruments mentioned below which should aid considerably not only in diagnostic pathology but in investigative pathology as well.

A 200-Year History of the Study of Childhood Language Disorders of Unknown Origin: Changes in Terminology

2020 ◽  
Vol 5 (1) ◽  
pp. 6-11 ◽  
Author(s):  
Laurence B. Leonard
Keyword(s):  
Language Impairment ◽  
Specific Language Impairment ◽  
Scientific Literature ◽  
Language Disorder ◽  
Language Disorders ◽  
Unknown Origin ◽  
Developmental Language Disorder ◽  
The Past ◽  
History Of ◽  
The Many

Purpose The current “specific language impairment” and “developmental language disorder” discussion might lead to important changes in how we refer to children with language disorders of unknown origin. The field has seen other changes in terminology. This article reviews many of these changes. Method A literature review of previous clinical labels was conducted, and possible reasons for the changes in labels were identified. Results References to children with significant yet unexplained deficits in language ability have been part of the scientific literature since, at least, the early 1800s. Terms have changed from those with a neurological emphasis to those that do not imply a cause for the language disorder. Diagnostic criteria have become more explicit but have become, at certain points, too narrow to represent the wider range of children with language disorders of unknown origin. Conclusions The field was not well served by the many changes in terminology that have transpired in the past. A new label at this point must be accompanied by strong efforts to recruit its adoption by clinical speech-language pathologists and the general public.

The Many Pasts of Detective Fiction

2020 ◽  
Vol 1 (2) ◽  
pp. 157-172
Author(s):  
Thomas Leitch
Keyword(s):  
Detective Fiction ◽  
Golden Age ◽  
Public History ◽  
Detective Novel ◽  
Sherlock Holmes ◽  
Detective Story ◽  
The Past ◽  
Wide Range ◽  
Detective Novels ◽  
The Many

Building on Tzvetan Todorov's observation that the detective novel ‘contains not one but two stories: the story of the crime and the story of the investigation’, this essay argues that detective novels display a remarkably wide range of attitudes toward the several pasts they represent: the pasts of the crime, the community, the criminal, the detective, and public history. It traces a series of defining shifts in these attitudes through the evolution of five distinct subgenres of detective fiction: exploits of a Great Detective like Sherlock Holmes, Golden Age whodunits that pose as intellectual puzzles to be solved, hardboiled stories that invoke a distant past that the present both breaks with and echoes, police procedurals that unfold in an indefinitely extended present, and historical mysteries that nostalgically fetishize the past. It concludes with a brief consideration of genre readers’ own ambivalent phenomenological investment in the past, present, and future each detective story projects.

Law as a Field of Tension

2018 ◽  
Author(s):  
Andrea Gamberini
Keyword(s):  
Public Authority ◽  
The Public ◽  
The Past ◽  
Political Cultures ◽  
The Many

As it had been in the communal age, so, in the Visconti-Sforza era, law was the instrument that the public authority relied upon in order to subordinate the many actors present and to subjugate their political cultures. There is, therefore, the attempt to tighten a vice around competing powers—a vice that is at the same time legislative, doctrinal, and judicial. And yet, it is difficult to escape the impression of an effort whose outcomes were somewhat more uncertain than had been the case in the past. The chapter focuses on all these aspects of the deployment of legal and other stratagems to consolidate or to wrest power.

Evidence-based Assessment

2010 ◽  
pp. 76-98
Author(s):  
John Hunsley ◽  
Eric J. Mash
Keyword(s):  
Decision Making ◽  
Clinical Assessment ◽  
Assessment Process ◽  
Evidence Based ◽  
The Past ◽  
Specific Assessment ◽  
The Many ◽  
Selection Of ◽  
Made In

Evidence-based assessment relies on research and theory to inform the selection of constructs to be assessed for a specific assessment purpose, the methods and measures to be used in the assessment, and the manner in which the assessment process unfolds. An evidence-based approach to clinical assessment necessitates the recognition that, even when evidence-based instruments are used, the assessment process is a decision-making task in which hypotheses must be iteratively formulated and tested. In this chapter, we review (a) the progress that has been made in developing an evidence-based approach to clinical assessment in the past decade and (b) the many challenges that lie ahead if clinical assessment is to be truly evidence-based.

CPT-based liquefaction case histories compiled from three earthquakes in Canterbury, New Zealand

2021 ◽  
pp. 875529302199636
Author(s):  
Mertcan Geyin ◽  
Brett W Maurer ◽  
Brendon A Bradley ◽  
Russell A Green ◽  
Sjoerd van Ballegooy
Keyword(s):  
New Zealand ◽  
Case History ◽  
Prediction Models ◽  
Free Field ◽  
Case Histories ◽  
Cone Penetration ◽  
History Data ◽  
The Past ◽  
Surface Manifestation ◽  
The Many

Earthquakes occurring over the past decade in the Canterbury region of New Zealand have resulted in liquefaction case-history data of unprecedented quantity. This provides the profession with a unique opportunity to advance the prediction of liquefaction occurrence and consequences. Toward that end, this article presents a curated dataset containing ∼15,000 cone-penetration-test-based liquefaction case histories compiled from three earthquakes in Canterbury. The compiled, post-processed data are presented in a dense array structure, allowing researchers to easily access and analyze a wealth of information pertinent to free-field liquefaction response (i.e. triggering and surface manifestation). Research opportunities using these data include, but are not limited to, the training or testing of new and existing liquefaction-prediction models. The many methods used to obtain and process the case-history data are detailed herein, as is the structure of the compiled digital file. Finally, recommendations for analyzing the data are outlined, including nuances and limitations that users should carefully consider.

Research trends in sociological studies on social security and welfare

2021 ◽  
pp. 026858092110053
Author(s):  
Koichi Hiraoka
Keyword(s):  
Social Security ◽  
Research Trends ◽  
Important Research ◽  
Research Results ◽  
The Past ◽  
Active Research ◽  
The Many ◽  
Sociological Studies ◽  
Broad Overview

This article reviews the research trends in welfare sociology (sociological studies on social security and welfare), one of the many subfields of active research in sociology in Japan. For this purpose, several research streams formed from the 1970s to the 2000s are described, and some of the most important research results produced within these in the past two decades are introduced. In the latter part of this article, a broad overview of the research trends in Japanese welfare sociology is attempted by focusing on the contents of the journal published by the Japan Welfare Sociology Association (JWSA).

Historiography: An Introductory Guide

2012 ◽  
Author(s):  
Eileen Ka-May Cheng
Keyword(s):  
Undergraduate Students ◽  
Historical Analysis ◽  
Historical Writing ◽  
Historical Events ◽  
The Past ◽  
Integral Role ◽  
History Of ◽  
American Historian ◽  
Subjective Perspective ◽  
The Many

“What is historiography?” asked the American historian Carl Becker in 1938. Professional historians continue to argue over the meaning of the term. This book challenges the view of historiography as an esoteric subject by presenting an accessible and concise overview of the history of historical writing from the Renaissance to the present. Historiography plays an integral role in aiding undergraduate students to better understand the nature and purpose of historical analysis more generally by examining the many conflicting ways that historians have defined and approached history. By demonstrating how these historians have differed in both their interpretations of specific historical events and their definitions of history itself, this book conveys to students the interpretive character of history as a discipline and the way that the historian’s context and subjective perspective influence his or her understanding of the past.

Cities of Splendour in the Shaping of Sephardi History

2020 ◽  
Author(s):  
Jane S. Gerber
Keyword(s):  
Seventeenth Century ◽  
Interdisciplinary Approach ◽  
Tenth Century ◽  
The Past ◽  
The Many ◽  
At Home

Sephardi identity has meant different things at different times, but has always entailed a connection with Spain, from which the Jews were expelled in 1492. While Sephardi Jews have lived in numerous cities and towns throughout history, certain cities had a greater impact on the shaping of their culture. This book focuses on those that may be considered most important, from Cordoba in the tenth century to Toledo, Venice, Safed, Istanbul, Salonica, and Amsterdam at the dawn of the seventeenth century. Each served as a venue in which a particular dimension of Sephardi Jewry either took shape or was expressed in especially intense form. Significantly, these cities were mostly heterogeneous in their population and culture — half of them under Christian rule and half under Muslim rule — and this too shaped the Sephardi worldview and attitude. While Sephardim cultivated a distinctive identity, they felt at home in the cultures of their adopted lands. The book demonstrates that Sephardi history and culture have always been multifaceted. The book's interdisciplinary approach captures the many contexts in which the life of the Jews from Iberia unfolded, without either romanticizing the past or diluting its reality.

Reporting altered test results in hemolyzed samples: is the cure worse than the disease?

2017 ◽  
Vol 55 (8) ◽  
pp. 1112-1114 ◽  
Author(s):  
Giuseppe Lippi ◽  
Gianfranco Cervellin ◽  
Mario Plebani
Keyword(s):  
Laboratory Data ◽  
Turnaround Time ◽  
Reliable Data ◽  
Test Results ◽  
The Past ◽  
Laboratory Test Results ◽  
Performance Specifications ◽  
Life Threatening ◽  
The Many ◽  
Definition Of

AbstractThe management of laboratory data in unsuitable (hemolyzed) samples remains an almost unresolved dilemma. Whether or not laboratory test results obtained by measuring unsuitable specimens should be made available to the clinicians has been the matter of fierce debates over the past decades. Recently, an intriguing alternative to suppressing test results and recollecting the specimen has been put forward, entailing the definition and implementation of specific algorithms that would finally allow reporting a preanalytically altered laboratory value within a specific comment about its uncertainty of measurement. This approach carries some advantages, namely the timely communication of potentially life-threatening laboratory values, but also some drawbacks. These especially include the challenging definition of validated performance specifications for hemolyzed samples, the need to producing reliable data with the lowest possible uncertainty, the short turnaround time for repeating most laboratory tests, the risk that the comments may be overlooked in short-stay and frequently overcrowded units (e.g. the emergency department), as well as the many clinical advantages of a direct communication with the physician in charge of the patient. Despite the debate remains open, we continue supporting the suggestion that suppressing data in unsuitable (hemolyzed) samples and promptly notifying the clinicians about the need to recollect the samples remains the most (clinically and analytically) safe practice.

Sign in / Sign up

Export Citation Format

Share Document