As critical discourse analysis/studies move into the second decade of the 21st century, there is a need to reflect on their evolution and envision their future development. In this paper, CiteSpace and VOSviewer are employed to gain holistic insights into CDA/CDS research and capture the recent research foci. The Web of Science core collection database is a prominent resource for collecting data. It was found that (1) CDA has broadly absorbed the theories of other disciplines and increasingly developed into a super-discipline; (2) corpus building, the advent of computer technology, and the development of linguistic analysis software have provided effective analytical tools for critical discourse research, making it possible for overall and partial analyses to complement each other and for complementary qualitative and quantitative approaches to be used to enhance the thoroughness and precision of research; and (3) the research methods for conducting CDA tend to be diverse and comprehensive.
Aiming at the current queuing problem in large theme parks and the insufficient utilization of facilities, a dynamic virtual queuing model is proposed, which can recommend the most time-saving tour route for visitors based on each visitor’s interest points and combined with the real-time dynamic changes of crowd flow in each facility. An improved data structure is proposed to transform the Dynamic Travelling Salesman Problem into Travelling Salesman Problem; the traditional genetic algorithm is also improved by proposing the Optimal Replication Method to optimally adjust the population before the selection operation, and the Parent-Child Competition Method is introduced in crossover and mutation to guarantee that the evolutionary process always proceeds in a beneficial direction. The improved data structure greatly improves the efficiency of the algorithm; the improved genetic algorithm can achieve convergence faster and find a better tour route in a faster time, thus improving the visitor experience.
BACKGROUND Melanin plays an essential role in determining human skin color. Melanogenesis is a process in which tyrosine is catalyzed by a variety of enzymes to form melanin granules. Dysfunction in melanogenesis leads to skin diseases including abnormal skin pigmentation – melasma, and vitiligo among others. The research progress of melanogenesis affects the development of skincare products. Hence, the research field of melanogenesis has become a hotspot in dermatology in the past decade. OBJECTIVE This study aimed to set up a bibliometric analysis of melanogenesis research in the latest 10 years. METHODS We downloaded the articles from the Web of Science Core Collection, using the subject term "melanogenesis", with a timespan starting from 2012 to 2022. The “bibliometrix” package of R, “Citespace” and “VOSviewer” software were used to perform content and bibliometric mapping analysis in melanogenesis research. RESULTS After refining, 2930 articles were retained. The distribution of annual publications showed an increased tendency. The geographical distribution revealed that scientific productions in Asia got ahead of Europe, North America and other areas in the field. The USA has cooperated most with other countries. The Seoul Natl University was the most productive organization. 70 % of melanogenesis-related papers were published in journals with impact factor (IF) 0-4, 27% within IF 5-9 and 3% in journals with IF above 10. The main research contents probe into ultraviolet radiation, mechanism, medicines and therapy, genes, melanosome development, microenvironment, signal pathways, inflammation factors, and skin whitening from 830 high-frequency keywords. The number of research themes increased over years. Early studies focused on melanogenesis inhibitors or tyrosinase activity and symptoms of melanogenesis disorders. However, in recent years, miRNA, RNA seq, microenvironment, aging, immunity and other aspects have been continuously studied. CONCLUSIONS The research field of melanogenesis is in a booming stage. As the quality of published articles increases, the diversity of research topics is increasing. CLINICALTRIAL None
Social semiotics is now widely regarded as one of the leading research areas. This study is the first attempt to present a holistic overview of social semiotics based on the data in the Web of Science core collection database from 2001 to 2020. The study investigates, among other issues, social semiotics’ publishing tendency, the most productive authors, countries, institutions, and hotspots. The results exhibit a steady rise in its publications and citations. The current analysis verifies the growing quantitative and qualitative research contributions and influences of this field. Furthermore, what the journal focuses on are the innovative and contemporary themes, manifested predominantly in sign, multimodality, gender, experimental semiotics, advertising, culture, and social media, which involve a wide range of methodologies to make the research more acceptable and constructive. These results are expected to offer refreshing insights that inspire scholars in formulating scientific agendas and advising their research strategies, thereby facilitating substantial contributions to the domain.
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