Key words and their role in information retrieval

Heterogeneity of Spatial-Temporal Distribution of Nitrogen in the Karst Rocky Desertification Soils and Its Implications for Ecosystem Service Support of the Desertification Control—A Literature Review

In recent years, the study of soil nitrogen distribution (SND) in rocky desertification control ecosystems has increased exponentially. Rocky desertification experiences severe environmental degradation due to its fragile nature, and understanding rocky desertification soil nitrogen (SN) is critical for ecosystem services (ES) to support sustainable development. From the perspective of bibliometrics, this paper systematically, comprehensively, qualitatively and quantitatively describes the progress, trends and hotspots of SND in the field of rocky desertification environment. The results show that: 97.40% of the document type is “Article”; the study of rocky desertification SND shows the characteristics of rapid growth, the volume of published articles in the past three years accounted for 34.30% of the total; active countries are mainly China, Germany, United States, Sweden, Finland, etc. The research hotspots in this field include karst and nitrogen, and the future research hotspots tend to focus on karst rocky desertification ecosystem, soil nutrients and vegetation diversity in south China. It is suggested to construct SN management strategy suitable for rocky desertification fragile ecosystems in the future, strengthen theoretical research and comprehensively understand the characteristics of rocky desertification control ecosystem to put forward sustainable management strategy according to local conditions.

Word cloud analysis and single word summarisation as a new paediatric educational tool: Results of a neonatal application

AIMS

To analyse the value of computerised 'word cloud' (WC) generated from spontaneously articulated 'single word summarisation' (SWS) by medical students to assist their learning during the neonatal intensive care unit placement. To highlight WC as a potential new tool in paediatric teaching, improving student engagement and reflective feedback.

METHODS

An observational study was conducted in the neonatal intensive care unit of University Maternity Hospital Limerick, Ireland for 5 years (October 2012 to September 2017). One faculty member prospectively recorded SWS in neonatology by graduate entry medical students. An online 'WC generator' under an open-source licence was used to compute the WC. Hospital audit committee approved the study.

RESULTS

A total of 268 SWS were recorded consecutively from 268 medical students towards the WC generation. Structured multi-response student feedback showed SWS and WC as stimulating, unique and creative. Powerpoint presentation of the computed WC prompted students to reflect on their chosen words and that of peers.

CONCLUSIONS

Visualisation of medical student-generated SWS as a WC could stimulate interaction, reflection and clinical discussion, thus assisting teachers to foster better student engagement. This innovative educational tool equips students to 'convey more with fewer words' and has the potential transferability to other clinical disciplines.

Current status of global research on novel coronavirus disease (COVID-19): a bibliometric analysis and knowledge mapping

Background: Novel coronavirus disease (COVID-19) is a major global health concern due to its pathogenicity and widespread distribution around the world. Despite a growing interest, little is known about the current state of research on COVID-19. This bibliometric study evaluated the contemporary scientific literature to assess the evolution of knowledge on COVID-19, identify the leading research stakeholders, and analyze the conceptual areas of knowledge development in this domain. Methods: Bibliometric data on COVID-19 related studies published until April 1, 2020, were retrieved from Web of Science core collection. Further, a quantitative evaluation and visualizations of knowledge areas in COVID-19 research were created by statistical and text-mining approaches using bibliometric tools and R software. Results: A total of 422 citations were retained in this study, including journal articles, reviews, letters, and other publications. The mean number of authors and citations per document was 3.91 and 2.47, respectively. Also, the top ten articles, authors, and journals were identified based on the frequencies of citations and publications. Networks of contributing authors, institutions, and countries were visualized in maps, which highlight discrete developments in research collaborations. Major areas identified through evaluating keywords and text data included genetic, epidemiological, zoonotic, and other biological topics associated with COVID-19. Conclusions: Current status of COVID-19 research shows early development in different areas of knowledge. More research should be conducted in less-explored areas, including socioeconomic determinants and impacts of COVID-19. Also, global research collaboration should be encouraged for strengthening evidence-based decision-making preventing and addressing the COVID-19 pandemic and aftermath.

USE OF THE BIBLIOGRAPHIC REFERENCE MANAGER IN THE SELECTION OF PRIMARY STUDIES IN INTEGRATIVE REVIEWS

ABSTRACT Objective: present the use of the bibliographic reference manager EndNote( as a support tool in the construction of a database and the selection of primary studies to develop integrative reviews. Method: a reflection study was undertaken, based on the international and the Brazilian literature. Results: the elaboration of an integrative review permits summarizing the knowledge about the theme of interest delimited in the health area, which can contribute by providing recommendations based on research results for clinical practice, as well as by identifying knowledge gaps, driving future research development. The use of bibliographic reference management tools is important for the selection of primary studies, permitting the location of repeated references, identification of languages, selection of publication periods and the creation of citations in the elaboration of the scientific text, among other resources. Conclusion: the advance in technologies, particularly the software EndNote(, has provided resources for the practicability of knowledge synthesis methods, in a transparent and replicable manner, consequently entailing a better quality of this type of study.