Crossmark policy page

2020 ◽  

DECENT Database is a participating member of CrossRef, which is a multi-publisher initiative that provides a standard method for readers to locate the most updated versions of an article through CrossMark Services. The Crossmark button situated on all published digital formats (HTML, PDF and ePub) of DECENT Database indicates membership in CrossRef. Application of the CrossMark button to all articles on DECENT Database affirms a commitment to uphold publishing integrity by maintaining the content of scholarly articles and promptly registering any updates. Clicking the CrossMark icon will inform the reader of the current status of a document and may also provide additional publication record information about the document.

2018 ◽  
Vol 44 (4) ◽  
pp. 363-389
Author(s):  
Hans M. Zell

Abstract No less than three international meetings on publishing in Africa have taken place recently, which have been followed with detailed action plawns. Among many other recommendations, calls for action to find solutions to perennial problems, as well as discussions focusing on sectorial innovation and revitalization of the African book industries, pwarticipants in all three meetings were strongly urged to start collecting and disseminating book industry data. It is true that reliable figures of book publishing output for the continent of Africa do not exist at the present time, with the exception of a very small number of countries, notably South Africa and Morocco. Meantime the state of African national bibliographies, which can form the groundwork of book industry data, presents a picture of neglect for the most part, with many national bibliographies seriously in arrears, currently dormant, or having ceased publication altogether. Only a small number are accessible in digital formats. Book publishing data and book production statistics are important elements in measuring the growth and vitality of indigenous publishing in any part of the world. In the absence of such data for most of the African continent, there is a need for research, analysis, documentation, and systematic gathering of current, reliable data and statistics on the whole book sector in Africa. However, there are huge challenges and complexities in the goal of collecting data for book industry surveys, which must not be underestimated. Many questions will need to be asked: for example, how is data going to be collected and analysed; what will be the parameters; and what are going to be the sources and the methods? Who should be responsible for undertaking the research and the compilation of such book industry data; and, crucially, who is going to fund the research and the data gathering process on a systematic and ongoing basis? Collecting book industry data is closely interrelated with the publication of national bibliographies and, in addition to examining the issues and challenges relating to the creation of book industry statistics, this paper also provides an analysis of the current state of national bibliographies in Africa, as well as linked matters such as legal deposit legislation, and compliance of legal deposit. Most national libraries and bibliographic agencies in Africa continue to operate under severe constraints, and have been chronically underfunded by their governments for the past four decades or more. An analysis of the current status of African national bibliographies sadly presents a dismal picture. It is unlikely that reliable data for the African book industries can be collected and published without the input and full cooperation of national libraries or bibliographic agencies. There is equally an urgent need for much more active collaboration and interaction between the agencies producing national bibliographies with publishers and book trade associations in each African country. Any attempts to revive the fortunes of African national libraries, and the resumption of publication of high quality and timely national bibliographies, will amount to a formidable task. This paper offers a range of suggestions and recommendations how the situation might be addressed and improved, but also points out that regular compilation of a national bibliography, and effective maintenance of legal deposit, necessitates adequate staff in terms of both numbers and expertise, which is not the case at this time.


1966 ◽  
Vol 25 ◽  
pp. 266-267
Author(s):  
R. L. Duncombe

An examination of some specialized lunar and planetary ephemerides has revealed inconsistencies in the adopted planetary masses, the presence of non-gravitational terms, and some outright numerical errors. They should be considered of temporary usefulness only, subject to subsequent amendment as required for the interpretation of observational data.


Author(s):  
Martin Peckerar ◽  
Anastasios Tousimis

Solid state x-ray sensing systems have been used for many years in conjunction with scanning and transmission electron microscopes. Such systems conveniently provide users with elemental area maps and quantitative chemical analyses of samples. Improvements on these tools are currently sought in the following areas: sensitivity at longer and shorter x-ray wavelengths and minimization of noise-broadening of spectral lines. In this paper, we review basic limitations and recent advances in each of these areas. Throughout the review, we emphasize the systems nature of the problem. That is. limitations exist not only in the sensor elements but also in the preamplifier/amplifier chain and in the interfaces between these components.Solid state x-ray sensors usually function by way of incident photons creating electron-hole pairs in semiconductor material. This radiation-produced mobile charge is swept into external circuitry by electric fields in the semiconductor bulk.


2021 ◽  
Author(s):  
Yuanhong Ma ◽  
Shao-Jie Lou ◽  
Zhaomin Hou

This review article provides a comprehensive overview to recognise the current status of electron-deficient boron-based catalysis in C–H functionalisations.


Sign in / Sign up

Export Citation Format

Share Document