Mathematics in Library and Review Classification Systems: An Historical Overview

2020 ◽  
Vol 47 (4) ◽  
pp. 334-356
Author(s):  
Craig Fraser
Keyword(s):  
United States ◽  
Classification Scheme ◽  
The United States ◽  
Classification Systems ◽  
General Level ◽  
Historical Overview ◽  
Modern Classification ◽  
Subject Areas ◽  
Different Parts

The modern classification of mathematical subjects occurred within the larger framework of library classification, a project receiving sustained attention in the period from 1870 to the present. The early work of the library cataloguers was carried out against the background of a broad nineteenth-century interest in the classification of knowledge. We explore different views during this period concerning the position of mathematics in the overall scheme of knowledge, the scope of mathematics and the internal organization of the different parts of mathematics. We examine how mathematical books were classified, from the most general level down to the level of particular subject areas in analysis. The focus is on the Library of Congress Classification in its various iterations from 1905 to the present. The article ends with an examination of the Mathematics Subject Classification Scheme employed today by reviewing services Mathematical Reviews in the United States and Zentralblatt in Germany.

Cordon approach to rivers

2020 ◽  
pp. 198-241
Author(s):  
S. Nazrul Islam
Keyword(s):  
United States ◽  
Case Studies ◽  
The United States ◽  
River Channels ◽  
The World ◽  
Different Types ◽  
Levee System ◽  
The Relationship ◽  
Different Parts

Chapter 9 presents the Cordon approach, describing its methods, reviewing its spread across the world, and analyzing its consequences. It discusses the general relationship between river channels and their floodplains and explains the nurturing functions that regular river inundations perform. The chapter then outlines the instruments of the Cordon approach, such as embankments, floodwalls, channelization, and canalization. It goes on to explain the relationship between the Cordon and the Polder approaches and offers a classification of cordons into different types. The chapter reviews the consequences of the Cordon approach, distinguishing between those for river channels and for floodplains. It provides an overview of the experience of the Cordon approach in different parts of the world, focusing on the United States, Europe, and India. It also presents two case studies of the Cordon approach: the Mississippi levee system in the United States and the Huang He River embankments in China.

Folklore and Folklife of European Americans

2019 ◽  
pp. 776-805
Author(s):  
Anthony Bak Buccitelli ◽  
Cory Thomas Hutcheson
Keyword(s):  
United States ◽  
The United States ◽  
European American ◽  
Traditional Practices ◽  
Historical Overview ◽  
The Core ◽  
Folk Traditions ◽  
European Americans ◽  
Local Traditions ◽  
Different Parts

This article covers the traditional practices of groups who trace their heritage to Europe. It includes a historical overview of immigration from Europe to the United States, as well as consideration of how European national, regional, and local traditions were reproduced, adapted, or recreated in different parts of the United States. It gives an overview of contemporary ethnic traditions as they have been studied across the country. Consideration is given to groups such as Italian, Irish, Polish, and German Americans, who have typically been studied as part of the core of European ethnic cultures in the United States. But at the same time, the essay poses questions of how European folk traditions were maintained and adapted by groups not often placed as “European American” ethnics. These include Latinx peoples, British Americans, and African Americans. In doing so, this article will underline the fluidity of ethnic boundaries, a fluidity that is mirrored in the traditions of folklore and folklife.

Significant Differences in Proved Reserves Estimates Using SPE/WPC Definitions Compared to United States Securities and Exchange Commission (SEC) Definitions

2005 ◽  
Vol 8 (06) ◽  
pp. 520-527 ◽  
Author(s):  
D.R. Harrell ◽  
Thomas L. Gardner
Keyword(s):  
United States ◽  
Oil And Gas ◽  
The United States ◽  
Securities And Exchange Commission ◽  
Classification Systems ◽  
Direct Function ◽  
Oil Companies ◽  
Publicly Owned ◽  
Hydrocarbon Reserves ◽  
The U.S

Summary A casual reading of the SPE/WPC (World Petroleum Congresses) Petroleum Reserves Definitions (1997) and the U.S. Securities and Exchange Commission(SEC) definitions (1978) would suggest very little, if any, difference in the quantities of proved hydrocarbon reserves estimated under those two classification systems. The differences in many circumstances for both volumetric and performance-based estimates may be small. In 1999, the SEC began to increase its review process, seeking greater understanding and compliance with its oil and gas reserves reporting requirements. The agency's definitions had been promulgated in 1978 in connection with the Energy Policy and Conservation Act of 1975 and at a time when most publicly owned oil and gas companies and their reserves were located in the United States. Oil and gas prices were relatively stable, and virtually all natural gas was marketed through long-term contracts at fixed or determinable prices. Development drilling was subject to well-spacing regulations as established through field rules set by state agencies. Reservoir-evaluation technology has advanced far beyond that used in 1978;production-sharing contracts were uncommon then, and probabilistic reserves assessment was not widely recognized or appreciated in the U.S. These changes in industry practice plus many other considerations have created problems in adapting the 1978 vintage definitions to the technical and commercial realities of the 21st century. This paper presents several real-world examples of how the SEC engineering staff has updated its approach to reserves assessment as well as numerous remaining unresolved areas of concern. These remaining issues are important, can lead to significant differences in reported quantities and values, and may result in questions about the "full disclosure" obligations to the SEC. Introduction For virtually all oil and gas producers, their company assets are the hydrocarbon reserves that they own through various forms of mineral interests, licensing agreements, or other contracts and that produce revenues from production and sale. Reserves are almost always reported as static quantities as of a specific date and classified into one or more categories to describe the uncertainty and production status associated with each category. The economic value of these reserves is a direct function of how the quantities are to be produced and sold over the physical or contract lives of the properties. Reserves owned by private and publicly owned companies are always assumed to be those quantities of oil and gas that can be produced and sold at a profit under assumed future prices and costs. Reserves under the control of state-owned or national oil companies may reflect quantities that exceed those deemed profitable under the commercial terms typically imposed on private or publicly owned companies.

scholarly journals Classification of Wetlands and Deepwater Habitats of the United States

2005 ◽  
Author(s):  
Lewis M. Cowardin ◽  
Virginia Carter ◽  
Francis C. Golet ◽  
Edward T. Laroe
Keyword(s):  
United States ◽  
The United States

scholarly journals The Banff Working Group Classification of Definitive Polyomavirus Nephropathy: Morphologic Definitions and Clinical Correlations

2017 ◽  
Vol 29 (2) ◽  
pp. 680-693 ◽  
Author(s):  
Volker Nickeleit ◽  
Harsharan K. Singh ◽  
Parmjeet Randhawa ◽  
Cinthia B. Drachenberg ◽  
Ramneesh Bhatnagar ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Working Group ◽  
Classification Scheme ◽  
Clinical Presentation ◽  
Interstitial Fibrosis ◽  
The United States ◽  
Systematic Analysis ◽  
Definition Of ◽  
Morphologic Classification

Polyomavirus nephropathy (PVN) is a common viral infection of renal allografts, with biopsy-proven incidence of approximately 5%. A generally accepted morphologic classification of definitive PVN that groups histologic changes, reflects clinical presentation, and facilitates comparative outcome analyses is lacking. Here, we report a morphologic classification scheme for definitive PVN from the Banff Working Group on Polyomavirus Nephropathy, comprising nine transplant centers in the United States and Europe. This study represents the largest systematic analysis of definitive PVN undertaken thus far. In a retrospective fashion, clinical data were collected from 192 patients and correlated with morphologic findings from index biopsies at the time of initial PVN diagnosis. Histologic features were centrally scored according to Banff guidelines, including additional semiquantitative histologic assessment of intrarenal polyomavirus replication/load levels. In-depth statistical analyses, including mixed effects repeated measures models and logistic regression, revealed two independent histologic variables to be most significantly associated with clinical presentation: intrarenal polyomavirus load levels and Banff interstitial fibrosis ci scores. These two statistically determined histologic variables formed the basis for the definition of three PVN classes that correlated strongest with three clinical parameters: presentation at time of index biopsy, serum creatinine levels/renal function over 24 months of follow-up, and graft failure. The PVN classes 1–3 as described here can easily be recognized in routine renal biopsy specimens. We recommend using this morphologic PVN classification scheme for diagnostic communication, especially at the time of index diagnosis, and in scientific studies to improve comparative data analysis.

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