649,802 research outputs found
Taylor-and-Francis_Impact-Assessment-of-Earth-and-Environmental-Sciences-Research-Author-Survey_Raw-Data_Figshare
No full textAnonymized responses dataset from the Taylor & Francis Impact Assessment of Earth & Environmental Sciences Research: Author Survey.In Spring 2020, Taylor & Francis surveyed authors from across our Earth & Environmental Sciences portfolio.We investigated what benefits publishing in our journals could impart on both the research and on the authors following publication, and we looked at to what extent global challenges, such as those expressed by the UN Sustainable Development Goals (SDGs), were shaping researcher ambitions.</div
The net reproduction rate and the type-reproduction number in multiregional demography
Get PDFIn order to study effects of migration on demographic changes of multiregional populations, multiregional population modelling is a useful traditional tool. Although multiregional mathematical demography has been extensively explored since the beginning of the 1970s, its key concept, the multiregional net reproduction rate, has been long neglected. In this review, we focus on a multiregional stable population system and elaborate the definition of the multiregional net reproduction rate. Next we introduce the type-reproduction number from mathematical epidemiology and show that it becomes a useful index to formulate a simple control relation for a multiregional population. Mathematical ideas presented here will help us to reconsider multiregional mathematical demography, which is a useful theoretical framework to study effects of interregional migration on population dynamics and composition.
Research Section
No full textThis archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposesElectronic reproduction Salem, Or. State Library of Oregon 2023 Electronic reproduction from print version OrMode of access: Internet from the Oregon Government Publications CollectionText in Englis
Childlessness and the concentration of reproduction in Austria
Get PDFIn this paper we study the changes of reproduction concentration among women, the levels of childlessness, individual factors influencing childlessness, and the contribution of childlessness to the concentration of reproduction in Austria for the female age cohorts 1917-1961. International comparative studies find a decline in the concentration of reproduction in the last century for all western countries, a trend that was reversed for the most recent cohorts that have reached the end of their reproductive period. This reversal was mainly triggered by an increase of childlessness, a result that can be confirmed also for Austria. The country has one of the highest levels of childlessness, both currently and historically, and changes in the level of childlessness are very pronounced. Austria has very low fertility, too; between the world wars it even witnessed the lowest period fertility in the world. While cohort fertility rates peaked during the baby-boom with 2.5 children per women, fertility decreased considerably for more recent age cohorts. The recent changes in fertility can be attributed partly to composition effects resulting from the educational expansion of the last decades. As our analysis shows, even in the times of the baby boom, cohort fertility exceeded the reproductive level only for the lowest of eight different educational groups, and this group is rapidly decreasing in size. Besides the strong impact of educational on cohort fertility, childlessness and concentration measures of reproduction, a detailed study based on micro-census data reveals strong urban-rural differentials in the demographic changes of the last decades. We can conclude that the recent re-increase in reproduction concentration is an entirely urban phenomenon. Micro-census data also allow for the study of intergenerational dynamics. Comparing the educational level of women with their parents’ educational attainment, we found a strong positive effect on childlessness of downward mobility in the lower end of the educational spectrum. In the upper end of the educational spectrum we found a strong positive effect on childlessness of upward mobility.Austria, childless couples, first birth
Seabird reproduction and diet
No full textDatasets that contain the raw data that is used for the analysis of the paper 'The most common diet results in low reproduction in a generalist seabird'. Breeding parameters and dietary information are shown per breeding pair and per breeding stage (egg phase or chick phase)
Recommendations and guidelines for applied reproduction trials with rabbit does
Get PDF[EN] This paper consists of a set of recommendations for applied reproduction trials with rabbit does. In the first part, the preparation of the experimental design is particularly developed (animals, size of the sample, housing conditions, breeding and feeding systems, establishing groups, insemination conditions, duration of the experiment). The second part defines some reproductive performances and how to measure them (sexual receptivity, fertility, prolificacy, mortality and growth of young, overall productivity). The last part provides a tool for data analysis. In the final considerations, it is emphasised that nowadays experiments have to take into account the recommendations related to animal welfare as well as the increasing sensitivity of consumers to considerations of meat quality. Reproduction traits are defined in an appendix.C. Robert and J.M Brun are gratefully acknowledged for their cooperation throughout this work. The authors are very grateful for the support of the European Commission (by the COST 848 Action) for facilitating the meetings and discussions between the different teams involved in applied rabbit reproduction experiments.International Rabbit Reproduction Group (2005). Recommendations and guidelines for applied reproduction trials with rabbit does. World Rabbit Science. 13(3). https://doi.org/10.4995/wrs.2005.521SWORD13
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
UNDP/UNFPA/WHO/World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP) : thirteenth meeting of the Scientific and Technical Advisory Group (STAG), Geneva, 26-29 February 1996, report
No full textONLINEHRP/STAG(13)/1996. Unpublished43 p
Mapping the Discipline of the Olympic Games An Author-Cocitation Analysis
Get PDFThe authors conducted an author cocitation analysis on prominent authors writing about the Olympics during the 1990s. Author cocitation is an established bibliometric technique that can be used to measure the relative similarities of topics written about by the cited authors. This enables a visual representation of the “intellectual space” of the discipline, in this case the Olympics, to be created for the period under review. So core and peripheral research areas are identified, along with their major contributors. The representation appears as a two-dimensional cluster-enhanced map. Subject expertise was then applied to the results to place labels on the generated clusters of authors and their topics
Fox reproduction from Grimsö, Centroid of Research Area
No full textInventory on red fox (Vulpes vulpes) reproduction. Approximately 190-220* dens are observed each year (May-June) for reproduction (=confirmed activity and litter) over the Grimsö Research Area; *number of dens varies between years due to destruction of dens by forestry or discovery of new dens.
Grimsö Wildlife Research Station (2025). Fox reproduction from Grimsö, Centroid of Research Area, 1973–2024 [Data set]. Swedish Infrastructure for Ecosystem Science (SITES). https://hdl.handle.net/11676.1/xvXFWr8Q-wTZZU9A8lRp939
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