Timeline Analysis Research Articles

Knowledge graph analysis of pyroptosis research in traditional Chinese medicine based on VOSviewer and CiteSpace

To explore the research hotspots and frontier directions of pyroptosis in the field of traditional Chinese medicine(TCM), the authors searched CNKI and Web of Science for literature related to pyroptosis in TCM, screened literature according to the search strategy and inclusion criteria, and analyzed the publication trend of the included literature. VOSviewer was used to draw author cooperation and keyword co-occurrence network diagrams, and CiteSpace was employed for keyword clustering, emergence, and timeline view. Finally, 507 Chinese literature and 464 English literature were included, and it was found that the number of Chinese and English literature was increasing rapidly year by year. The co-occurrence of the authors showed that in terms of Chinese literature, there was a representative research team composed of DU Guan-hua, WANG Shou-bao and FANG Lian-hua, and for English literature, the representative research team was composed of XIAO Xiao-he, BAI Zhao-fang and XU Guang. The network visualization of Chinese and English keywords revealed that inflammation, apoptosis, oxidative stress, autophagy, organ damage, fibrosis, atherosclerosis, and ischemia-reperfusion injury were the primary research diseases and pathological processes in TCM; berberine, resveratrol, puerarin, na-ringenin, astragaloside Ⅳ, and baicalin were the representative active ingredients; NLRP3/caspase-1/GSDMD, TLR4/NF-κB/NLRP3, and p38/MAPK signaling pathways were the main research pathways. Keyword clustering, emergence, and timeline analysis indicated that the pyroptosis research in TCM focused on the mechanism of TCM monomers and compounds intervening in diseases and pathological processes. Pyroptosis is a research hotspot in the area of TCM, and the current discussion mainly focuses on the mechanism of the therapeutic effect of TCM.

Preservice teachers’ TPACK learning trajectories in an online educational technology course

This mixed-methods study analyzed Technological Pedagogical Content Knowledge (TPACK) learning trajectories of preservice teachers enrolled in an online seven-week long educational technology course. Timeline analysis was used to identify and interpret emerged patterns of learning trajectories. The study suggests that continuous growth of the group mean TPACK could be attributed to the inclusion of immersion - theory - analysis - digital content development cycles, focus on high-impact teaching strategies, and a choice of interactive online platform. Level of participation, support from the instructors, and confidence in using technology for teaching and learning moderated the course influence leading to several distinct patterns in individual TPACK learning trajectories.

MOOCs as a Research Agenda: Changes Over Time

MOOCs (massive open online courses) have attracted considerable attention from researchers. Fueled by constant change and developments in educational technology, the trends of MOOCs have varied greatly over the years. To detect and visualize the developments and changes in MOOC research, 4,652 articles published between 2009 and 2021 were retrieved from Web of Science and Scopus with the aid of CiteSpace. This study sought to explore the number of publications, co-citation network, cluster analysis, timeline analysis, burstness analysis, and dual-map overlays based on co-citation relationships. The first finding was that the number of publications on MOOCs had increased consistently, and grew especially quickly between 2013 and 2015. Second, the main topic of the top 10 co-cited studies revolved around the problem of learner continuance. Third, blended programs, task-technology fit, and comparative analysis have emerged as popular subjects. Fourth, the development of MOOC research has followed distinct phases, with 2009 to 2012 the starting phase, 2013 to 2015 the high growth phase, 2016 to 2018 the plateau phase, and 2019 to 2021 another peak phase. Lastly, both cluster analysis and dual-map overlays provided empirical evidence of cross-disciplinary research. Our findings provided an in-depth and dynamic understanding of the development and evolution of MOOC research and also proposed novel ideas for future studies.

Expropriation between a legal figure and an approach for urban development: global trends and Egyptian reflections

Expropriation of land is considered a crucial instrument of any development practice. The legitimacy of expropriation is essentially reinforced as it is employed for the public interest, often implied as infrastructure and public services. While in the private property on one side and the public interest on the other, urban development acts to be the art of getting the right balance. Despite urban development paradigms significantly affecting expropriation practices, most reviewed literature focused on legal aspects of expropriation. However, few were attentive to addressing the relation between expropriation and the urban universe. What are the current trends of the expropriation function and how extensively is it used for urban development? It can be elaborated as the study’s core question, while the research aims at mapping the development of the expropriation function and how extensively expropriation is used across time and space. Therefore, the study adopts a qualitative comparative approach to explore the global trends of expropriation for urban development and map convergence and deviations. The proposed criteria for comparison aim to discover how extensively expropriation is used, the legal changes and the institutional contexts. In addition, the applied part of the study uses a case study analysis method. A chronological timeline analysis of the Egyptian case was conducted to explore the nature of expropriation practices of Nasser’s time (1956–1970) to Mubarak’s time (1981–2011) in Egypt.Globally, expropriation practices have a heterogeneous nature. Certain features, however, are common enough to justify classifying practices for this study. The research comes up with a schematic mapping intending not to be comprehensive but flexible enough to be applied as a framework to analyse and compare other cases in different contexts. Finally, the research concludes by comparing and positioning the Egyptian case in the light of the global trends and provides principal lessons to planners, governmental parties, and policy-makers.

Evolution, status, and trends of exergy research: a systematic analysis during 1997–2020

Exergy analysis, as a core evaluation tool to improve energy efficiency and system sustainability, has been applied in various fields over the last decades, leading to a significant increase of exergy-related publications. However, the existing reviews only analyzed part of publications related to a specific topic and lack a systematic analysis. To fill this research gap, a coupled bibliometric analysis and knowledge map method was conducted on 13,941 exergy-related publications during 1997-2020. Results show that publications increased from 54 in 1997 to 1976 in 2020. Journal of Energy is the most productive journals (1543 publications), and Energy & Fuels is the most popular subject category (9204 publications). Three developing countries in Asia (China, Iran, and Turkey) are the most productive, accounting for 45.87%. The main research objects and methods in this field were identified by cluster analysis. Furthermore, timeline analysis and burst detection analysis show that the new research hotspots or research frontiers will focus on organic Rankine cycle, building industry, multi-objective optimization, and sustainable development. This study further pointed out the future direction of the exergy field: in-depth application of the coupled exergy and exergoeconomic analysis; technologies development for efficient utilization of renewable energy, clean energy, and waste heat; enrichment of exergy framework incorporating environmental perspectives and mathematical methods; adaptation of theoretical research; and system optimization to the needs of social development. Through the review of exergy-related publications, results of this study can help to better identify the research hotspots and provide a valuable reference for future research.

Controversial Themes and Issues Surrounding Autism: A Chronological Timeline Analysis

Controversial Themes and Issues Surrounding Autism: A Chronological Timeline Analysis

Sustainable Building Design Development Knowledge Map: A Visual Analysis Using CiteSpace

Based on the Web of Science (WoS) core collection database, this article compares the research results in this subject area since 2000 with the literature data on the theme of sustainable architectural design and conducts an in-depth investigation into the research themes, basic literature, development trends, and research frontiers. Qualitative and quantitative analyses were conducted through the CiteSpace scientific visualization software, and the degree of collaboration between authors, institutions, and countries was analysed through research power. The topical research hotspots and their evolution were explored through a word frequency analysis, cluster analysis, and timeline analysis; the origins and development of a particular issue in sustainable building design were explored in conjunction with mutation analysis; and the frontier hotspots were explored. The analysis of co-citations was used to identify important knowledge bases in the field; the flow of knowledge between disciplines was explored through biplot overlay analysis. By interpreting the scientific visualization knowledge map, it was concluded that the research trends in sustainable building design are mainly in the areas of resource control, energy consumption, renewable building materials, evaluation systems, and computer-aided tools, and so on. The major topics of future research related to sustainable building design are discussed and summarized.

Molecular genotypic analysis of porcine circovirus type 2 reveals the predominance of PCV2d in Vietnam (2018-2020) and the association between PCV2h, the recombinant forms, and Vietnamese vaccines.

We conducted nucleotide and amino acid sequence alignment and phylogenetic analysis of porcine circovirus ORF2 (Cap protein) from 17 PCV2-positive clinical samples from nine different northern Vietnamese provinces (Mar 2018-Nov 2020), four local vaccines, and 77 reference strains. We identified one PCV2a (1/17 = 5.9%), five PCV2b (5/17 = 29.9%), and 11 PCV2d (11/17 = 64.7%) isolates, while only PCV2d was detected in 2020. Timeline analysis indicated an increasing predominance of PCV2d nationwide (2018-2020). With strong nodal support (98% for nucleotides and 74% for amino acids), the phylogenetic tree topology revealed a distinct PCV2h clade including recombinant/intermediate strains and local vaccines. The Cap protein sequences from 11 PCV2d field strains had the 2d-genotype-typical motif 86SNPLSV91 in loop CD, the motif TGID in loop GH-HI, and the motif 230PLNPK234 in loop CT. The PCV2h isolates (and vaccines) had the 86SNPLSV91, SAID, and 230L(N/H)PK234 motifs. Selection pressure analysis indicated positive selection at seven sites: A68N in immunoreactive region (IRR)-A; 119G and 130V in IRR-B; and 167L, T190(A/S), 194D and 202F in IRR-C. We identified PCV2h as the genotype of the recombinant strains, which resulted from intergenotype recombination of PCV2a, PCV2b, and PCV2d. The current data provide new information about the diversity, distribution, and dominance of the PCV2 genotype in Vietnam.

Quantifying global digital journalism research: a bibliometric landscape

PurposeThe purpose of this paper is to present a comprehensive analysis of the current status and development of the digital journalism field from 1987 to 2021 using the Dimensions database.Design/methodology/approachUsing the Dimensions.ai database, 1734 articles were identified through search strategies which were published from 1987 to 2021. The downloaded results were analysed using specific parameters with the help of bibliometric and science mapping tools: Biblioshiny, VOSviewer and CiteSpace. The key contributions of the present comprehensive bibliometric study of the digital journalism field can be seen in terms of the following aspects: (1) Publication analysis from the perspectives of publication growth, key journals, contributing authors, institutions and countries done through Biblioshiny package. (2) Citation network analysis from the perspective of co-citation structure of papers, authors, countries and institutions done through VOSviewer. (3) Timeline analysis and keywords burst detection to identify hotspots and research trends in digital journalism with the help of CiteSpace.FindingsThe first paper with the keyword digital journalism was published in the year 1989. From 2011 onwards, there has been growth in digital journalism literature. The most popular journal in digital journalism studies is Digital Journalism, Journalism, Journalism Practice, Journalism Studies. Lewis, S.C. has contributed the most number of papers in digital journalism. Further, authors from the countries the USA, Spain, Brazil and UK have contributed immensely. The citation network of authors, institutions and countries contributing to digital journalism studies has also been explored in the study. Through burst analysis, hot topics in digital journalism were identified.Originality/valueThe paper provides a complete overview of the growth of digital journalism literature published from 1987 to 2021. The originality of this work lies in the triangulation of Biblioshiny, VOSviewer and CiteSpace software to present various aspects of bibliometric study. Findings of the study can help the researchers to identify areas as well as journals, authors, institutions working actively in the field of digital journalism.

Visualizing the Intellectual Structure of the Impact of COVID-19 on E-learning

Since the advent of the Internet, the platforms of learning sites have gradually shifted. However the first report of the novel coronavirus (COVID-19) in 2019 became the start of the huge and unknown change in the field of e-learning. In this paper, the research period is divided into two parts for the analysis: pre-COVID-19(2018 - 2019) and post-COVID-19(2020 - 2021). We analyzed the data extracted from Web of Science by using the program called CiteSpace (Chen, 2004) and confirmed the top three sub-areas of the pre-COVID-19. They were “E-learning System”, “Investigating Students Acceptance” and “Case Studies.” The top three sub-areas of post-COVID-19 period were “COVID-19 Pandemic”, “Teacher Behavior” and “Academic Achievement”. Through the timeline analysis the overall changes were identified and the promising clusters were predicted. Burst detection analysis also extracted the most significant documents of the e-learning field.

Minimally Invasive Transpedicular Screw Fixation: Review of 152 Cases in a Single Institution. Steep or Shallow Learning Curve?

In this study, we analyze our institutional experience and personal impressions using minimally invasive spine surgery (MISS) to describe our learning curve and how experience influenced different parameters of the surgical procedure. The study was conducted prospectively and included the first consecutive 152 patients treated with MISS techniques. Patient demographics, surgical data, length of hospital stay, and clinical outcome were reviewed. The cohort was divided into consecutive quarters. Comparison between the quarters and timeline analysis were made to assess the learning curve. Only percutaneous transpedicular screw fixation was performed in 65 cases, minimally invasive transforaminal lumbar interbody fusion (MI-TLIF) in 70 cases, and vertebral body replacement in 4 cases. The average blood loss was 113.3, 115, 106.6, and 107.1 mL for each quarter. The average operative time was 155.0, 143.2, 134.5, and 133.8 minutes for the four quarters, whereas the average radiation exposure time was 105.4, 85.3, 46.2, and 45.2 seconds. Differences in the operative time and radiation exposure time between the first to third and the first to fourth quarters were statistically significant. Some advantages of MISS techniques could be observed with the very first cases and were not related significantly with the surgeon's experience with MISS. With the acquisition of more experience, some disadvantages of MISS techniques such as longer operative time and longer X-ray exposure can be substantially reduced. Surgical experience, familiarity of the team with the MISS instrumentation, and good patient selection are crucial for achieving all the benefits of MISS.

Knowledge Map of Spatial Planning and Sustainable Development: A Visual Analysis Using CiteSpace

Spatial planning has become an important measure for countries and regions to promote sustainable development. However, there remains a lack of systematic and quantitative research on spatial planning worldwide. In this study, CiteSpace was used to perform bibliometric analysis and visualization research on the Web of Science core collection and China National Knowledge Infrastructure database. It was found that: (1) The number of papers published in global spatial planning research shows an increasing trend, especially after 2018, with China showing an obvious increasing trend. (2) Globally, the United States has the largest number of relevant research results, and Italy has the most cooperation with other countries. The highest research output is from developed countries, while that of developing countries is relatively weak. (3) There is some intersection among countries, disciplines, and authors but it is not strong, indicating that cooperation should be strengthened. (4) Through keyword cluster, timeline, and time zone analysis, global development can be roughly divided into three stages: the first stage is characterized by the study of spatial planning system theory, the second stage is characterized by building green infrastructure and providing ecological services, and the third stage is characterized by an emphasis on public participation and the establishment of justice mechanisms. China’s development corresponds to three stages: the theory and experience learning stage, the spatial planning system focused on economic development stage, and the integration of multiple plans and the sustainable development exploration stage. (5) There are differences in burst words between the world and China, indicating that there are great differences in research hotspots in different countries’ periods and conditions.

Power relations in global supply chains and the unequal distribution of costs during crises: Abandoning garment suppliers and workers during the COVID-19 pandemic.

In early 2020, apparel brands and retailers cancelled US$40 billion worth of orders, with critical consequences for suppliers and workers. Their actions illustrate the power asymmetries in global supply chains and the unequal distribution of costs during crises. This article explores these dynamics through original survey data, supplier questionnaires, stakeholder interviews, a time‐line analysis and trade data analysis. Findings point to certain limits of buyer power, reflected in the effective collaboration between suppliers and worker rights advocates in the “#PayUp” campaign. Yet buyers retain the power to squeeze suppliers with adverse impacts on workers, thus leading to calls for binding agreements.

Estimating the required number of Harbour Pilots to support airline operations of a single pilot commercial aircraft at a UK regional airport

AbstractSingle pilot passenger aircraft concepts are being developed by several manufacturers. Various technological approaches are being explored: One concept is to use a Harbour Pilot dedicated to providing support for departures and arrivals. The Harbour Pilot has comprehensive knowledge of the terminal area airspace, procedures and operations. If a single pilot aircraft is to be viable, however, the number of supporting personnel needs to be significantly smaller than the number of First Officers normally employed for a two-crew aeroplane, but the number such staff has yet to be determined. This study models operations by a UK low-cost operator at a regional airport to determine the optimum number of Harbour Pilots required to support operations throughout the day. The model uses a simplified timeline analysis with task data incorporated into a dynamic discrete event modelling system allowing for multiple replications using various configurations. Results suggest that for this operation six Harbour Pilots per shift used flexibly to support both departures and arrivals would be required.

‘We are not going to shut down, because we cannot postpone pregnancy’: a mixed-methods study of the provision of maternal healthcare in six referral maternity wards in four sub-Saharan African countries during the COVID-19 pandemic

IntroductionReferral hospitals in sub-Saharan Africa are located in crowded urban areas, which were often epicentres of the COVID-19 pandemic. This paper prospectively assesses how maternal healthcare was provided in six...

A mixed-methods study of maternal health care utilisation in six referral hospitals in four sub-Saharan African countries before and during the COVID-19 pandemic

IntroductionIn sub-Saharan Africa, referral hospitals are important sources of key maternal health services, especially during a crisis such as the COVID-19 pandemic. This study prospectively assessed the effect of the...

Economic effects of African swine fever at Hungarian and European level

Examining the pig sector in Europe, it can be said that the emergence of African swine fever (ASF) has a major impact on the sector. In connection with this, the aim of this article was to highlight the trends of the Hungarian pig sector, as well as the sales prices of Germany for a more accurate analysis, to give a comprehensive picture of how the Hungarian market trends developed with the appearance of ASF.
 For this, a three-year cycle was analyzed using different timeline analysis methods. After evaluating this, it was confirmed that compared to the period before the outbreak of the epidemic in Hungary, market fluctuations increased, and in the trends of weekly sales prices per kilogram, the predictability decreased.
 Based on this, it can be concluded that in such a globalized and price-tracking sector, it is a serious lesson for Hungary that due to its small size and low degree of integration, it is much more disadvantaged during crisis situations than other larger pig-keeping countries. All participants in the sector need to learn from this situation and, together with the policy, change the situation in Hungary as soon as possible, by raising the vertical integration of the sector.

Research Progress and Future Prospect of Dance Movement Therapy in China Based on a Citespace Visual Analysis

The purpose of this study was to (1) explore the research progress of dance movement therapy in China and (2) reveal future development trend of dance movement therapy. With the methods of literature review, logical induction and scientific knowledge mapping, the research results of dance movement therapy in China were analyzed visually. The co-occurrence chart of key words and timeline analysis chart of key words of dance movement therapy in China were created based on the data. The co-occurrence chart of key words showed that the research hotspots centered on "dance therapy", "psychotherapy", "Parkinson's disease", "autism", "special children", "teenagers", "college students" and "college students". The subjects of dance therapy were mainly special children, teenagers and college students. The diseases of dance therapy focused on "Parkinson's disease", "schizophrenia", "autism", "social anxiety". Timeline analysis chart of key words showed that research subjects experienced trended from "psychotherapy", "autism" to "Parkinson's disease" and "dance decompression". The patients in the study expanded from "college students" and "autistic children" to "teenagers" and "college students". The auxiliary elements of dance therapy experienced the expansion from "dance" to "music" and "art". On the basis of summarizing the experience gained from clinical practice, we should further clarify the operational definition and effect evaluation of dance therapy, and establish a complete and systematic dance analysis system. We should explore how to combine drug therapy with dance therapy, and study the best proportion of the two in the treatment. Under the background of the combination of medicine and sports, we should think about how to promote dance therapy, integrate dance therapy into disease prevention and treatment, and accelerate the advancement of the dance therapy industry.

Visual framing of migrants and refugees in Serbia’s media from 2015 until 2020

The research of media presentation of migrants and refugees has been intensified in recent years, especially after 2015 when several million people fled their homes from the war zones in the Middle East and Africa. Contemporary scholarship focusing on journalistic and media reporting on migrant crisis has been mainly researching Western European and the US media context, as well as verbal media narratives of print media outlets. Only a small number of papers examines visual media content, which can have a significant impact on citizens? perceptions about migrants and refugees. In Serbia, a country situated on ?the Balkans route? and which more than a million people from Middle East and Africa had crossed since 2015, visual depiction of migrants and refugees has been rarely researched. Against this background, the paper is based on media framing theory and examines visual framing of migrants and refugees in nine print and online media in Serbia from 2015 until 2020. Methodologically, the paper builds on mixed method research of 469 images analyzed within the denotative, stylistic-semiotic and connotative level of visual media framing (Rodriguez and Dimitrova, 2011), including the timeline analysis of dominant visual media frames and presentation techniques of migrants and refugees in the relevant media outlets in Serbia.

Surfing on Three Waves of MOOCs: An Examination and Snapshot of Research in Massive Open Online Courses

The purpose of this research is to examine the research that has been done on MOOCs by applying data mining and analytic approaches and to depict the current state of MOOC research. The text mining revealed four broad themes: (I) MOOCs as a mainstreaming learning model in HE, (II) motivation and engagement issues in MOOCs, (III) assessment issues in MOOCs, and (IV) MOOCs for social learning. The social network analysis indicated that MOOCs are a significant aspect of online education and that learning analytics are considered a solution to current MOOC handicaps. Both pivotal contribution analysis and timeline analysis demonstrated that MOOC research has a heavy focus on motivation and engagement, high drop out and low retention rates, and instructional quality. Overall, the research concludes that the first wave of MOOC research largely concentrated on the qualitative characteristics of the phenomenon, while the second and third waves of MOOC research concentrated on the quantitative characteristics.