According to the Thomson Reuter report on 28 June 2012, the 2011 Impact Factor of Journal of Natural Gas Chemistry is 1.348, which ranks first among chemistry journals in China. We would like to express our appreciati...According to the Thomson Reuter report on 28 June 2012, the 2011 Impact Factor of Journal of Natural Gas Chemistry is 1.348, which ranks first among chemistry journals in China. We would like to express our appreciation to all the authors who have contributed their good work to the Journal. The following is the list of the articles published in 2009 and 2010 which received the most citations and thus contributed the most to the new impact factor.展开更多
AIM:To determine and evaluate the features of highly cited articles(HCAs)in the ophthalmology category in the Science Citation Index Expanded(SCI-EXPANDED)from 1991 to 2020.METHODS:The Web of Science Core Collection d...AIM:To determine and evaluate the features of highly cited articles(HCAs)in the ophthalmology category in the Science Citation Index Expanded(SCI-EXPANDED)from 1991 to 2020.METHODS:The Web of Science Core Collection documents with at least 100 citations from their publication year until December 31,2020,were evaluated as highly cited.The examined features were the distribution of yearly output and its average number of per publication,HCAs,authors,institutions,journals,and nations.The publication performance of nations and organizations was assessed using six publication indicators.The Y-index was employed to compare the research outputs of various authors.RESULTS:Publications that had cited the most references were highly published in high-impact factor journals.The United States of America came out on top across all six publication indicators,and it was home to eight of the top 10 most productive institutions.The articles written by Breivik et al(2006)and Farrar et al(2001)were highly cited and had a significant impact in 2020.The authors had a higher number of highly cited articles published as corresponding authors than as first authors.CONCLUSION:The findings of the present study highlight the current scope of global research in ophthalmology.The findings can help policy-makers and advisory groups of research centers to develop future policies.In addition,the findings can guide researchers in this field.展开更多
Purpose:Recently,a vast number of scientific publications have been produced in cities in emerging countries.It has long been observed that the publication output of Beijing has exceeded that of any other city in the ...Purpose:Recently,a vast number of scientific publications have been produced in cities in emerging countries.It has long been observed that the publication output of Beijing has exceeded that of any other city in the world,including such leading centres of science as Boston,New York,London,Paris,and Tokyo.Researchers have suggested that,instead of focusing on cities'total publication output,the quality of the output in terms of the number of highly cited papers should be examined.However,in the period from 2014 to 2016,Beijing produced as many highly cited papers as Boston,London,or New York.In this paper,another method is proposed to measure cities'publishing performance by focusing on cities'publishing efficiency(i.e.,the ratio of highly cited articles to all articles produced in that city).Design/methodology/approach:First,554 cities are ranked based on their publishing efficiency,then some general factors influencing cities'publishing efficiency are revealed.The general factors examined in this paper are as follows:the linguistic environment of cities,cities'economic development level,the location of excellent organisations,cities'international collaboration patterns,and their scientific field profile.Furthermore,the paper examines the fundamental differences between the general factors influencing the publishing efficiency of the top 100 most efficient cities and the bottom 100 least efficient cities.Findings:Based on the research results,the conclusion can be drawn that a city's publishing efficiency will be high if meets the following general conditions:it is in a country in the Anglosphere-Core;it is in a high-income country;it is home to top-ranked universities and/or world-renowned research institutions;researchers affiliated with that city most intensely collaborate with researchers affiliated with cities in the United States,Germany,England,France,Canada,Australia,and Italy;and the most productive scientific disciplines of highly cited articles are published in high-impact multidisciplinary journals,disciplines in health sciences(especially general internal medicine and oncology),and disciplines in natural sciences(especially physics,astronomy,and astrophysics).Research limitations:It is always problematic to demarcate the boundaries of cities(e.g.,New York City vs.Greater New York),and regarding this issue there is no consensus among researchers.The Web of Science presents the name of cities in the addresses reported by theauthors of publications.In this paper cities correspond to the spatial units between the country/state level and the institution level as indicated in the Web of Science.Furthermore,it is necessary to highlight that the Web of Science is biased towards English-language journals and journals published in the field of biomedicine.These facts may influence the outcome of the research.Practical implications:Publishing efficiency,as an indicator,shows how successful a city is at the production of science.Naturally,cities have limited opportunities to compete for components of the science establishment(e.g.,universities,hospitals).However,cities can compete to attract innovation-oriented companies,high tech firms,and R&D facilities of multinational companies by for example establishing science parks.The positive effect of this process on the city's performance in science can be observed in the example of Beijing,which publishing efficiency has been increased rapidly.Originality/value:Previous scientometric studies have examined cities'publication output in terms of the number of papers,or the number of highly cited papers,which are largely size dependent indicators;however this paper attempts to present a more quality-based approach.展开更多
Over the past decade, the Journal of Natural Gas Chem- istry has become more and more international and has received large numbers of manuscripts concerning energy chemistry. In deed, nowadays energy chemistry is beco...Over the past decade, the Journal of Natural Gas Chem- istry has become more and more international and has received large numbers of manuscripts concerning energy chemistry. In deed, nowadays energy chemistry is becoming one of the hot topics. To extensively report the most important and latest devel- opments in energy chemistry, the journal has renamed as Jour- nal of Energy Chemistry from January 2013. The main contents include new developments in fields of optimized chemical utiliza- tion of both conventional and unconventional fossil energies; re- search and utilization of hydrogen energy; conversion and stor- age of electrochemical energy; capturing, storage and chemi- cal utilization of C02; new materials and nanotechnologies re- lated to energy utilization; chemical conversion of biomasses; and chemical approaches related to photo-catalysis, and so on.展开更多
Scientific journals are more likely to publish those articles which will be highly cited after theirpublication. To improve the quality and the impact of the Chinese Medical Journal （CMJ）, the distribution of highly...Scientific journals are more likely to publish those articles which will be highly cited after theirpublication. To improve the quality and the impact of the Chinese Medical Journal （CMJ）, the distribution of highly cited articles published in CMJ in 2010 was analyzed and reported in this article.展开更多
Lithium-sulfur batteries have been regarded as the next-generation rechargeable batteries due to their high theoretical energy density and specific capacity.Nevertheless,the shuttle effect of lithium polysulfides has ...Lithium-sulfur batteries have been regarded as the next-generation rechargeable batteries due to their high theoretical energy density and specific capacity.Nevertheless,the shuttle effect of lithium polysulfides has hindered the development of lithium-sulfur batteries.Herein,a novel zirconium-based metal-organic framework-801 film on carbon cloth was developed as a versatile interlayer for lithium-sulfur batteries.This interlayer has a hierarchical porous structure,suitable for the immobilization of lithium polysulfides and accommodating volume expansion on cycling.Moreover,the MOF-801 material is capable of strongly adsorbing lithium polysulfides and promoting their catalytic conversion,which can be enhanced by the abundant active sites provided by the continuous structure of the MOF-801 films.Based on the above advantages,the lithium-sulfur battery,with the proposed interlayer,delivers an initial discharge capacity of 927 mAh·g^(-1) at 1 C with an extremely low decay rate of 0.04%over 500 cycles.Additionally,a high area capacity of 4.3 mAh·cm^(-2) can be achieved under increased S loading.展开更多
文摘According to the Thomson Reuter report on 28 June 2012, the 2011 Impact Factor of Journal of Natural Gas Chemistry is 1.348, which ranks first among chemistry journals in China. We would like to express our appreciation to all the authors who have contributed their good work to the Journal. The following is the list of the articles published in 2009 and 2010 which received the most citations and thus contributed the most to the new impact factor.
文摘AIM:To determine and evaluate the features of highly cited articles(HCAs)in the ophthalmology category in the Science Citation Index Expanded(SCI-EXPANDED)from 1991 to 2020.METHODS:The Web of Science Core Collection documents with at least 100 citations from their publication year until December 31,2020,were evaluated as highly cited.The examined features were the distribution of yearly output and its average number of per publication,HCAs,authors,institutions,journals,and nations.The publication performance of nations and organizations was assessed using six publication indicators.The Y-index was employed to compare the research outputs of various authors.RESULTS:Publications that had cited the most references were highly published in high-impact factor journals.The United States of America came out on top across all six publication indicators,and it was home to eight of the top 10 most productive institutions.The articles written by Breivik et al(2006)and Farrar et al(2001)were highly cited and had a significant impact in 2020.The authors had a higher number of highly cited articles published as corresponding authors than as first authors.CONCLUSION:The findings of the present study highlight the current scope of global research in ophthalmology.The findings can help policy-makers and advisory groups of research centers to develop future policies.In addition,the findings can guide researchers in this field.
基金supported by the EFOP-3.6.1-16-2016-00022 projectproject is co-financed by the European Union and the European Social Fund
文摘Purpose:Recently,a vast number of scientific publications have been produced in cities in emerging countries.It has long been observed that the publication output of Beijing has exceeded that of any other city in the world,including such leading centres of science as Boston,New York,London,Paris,and Tokyo.Researchers have suggested that,instead of focusing on cities'total publication output,the quality of the output in terms of the number of highly cited papers should be examined.However,in the period from 2014 to 2016,Beijing produced as many highly cited papers as Boston,London,or New York.In this paper,another method is proposed to measure cities'publishing performance by focusing on cities'publishing efficiency(i.e.,the ratio of highly cited articles to all articles produced in that city).Design/methodology/approach:First,554 cities are ranked based on their publishing efficiency,then some general factors influencing cities'publishing efficiency are revealed.The general factors examined in this paper are as follows:the linguistic environment of cities,cities'economic development level,the location of excellent organisations,cities'international collaboration patterns,and their scientific field profile.Furthermore,the paper examines the fundamental differences between the general factors influencing the publishing efficiency of the top 100 most efficient cities and the bottom 100 least efficient cities.Findings:Based on the research results,the conclusion can be drawn that a city's publishing efficiency will be high if meets the following general conditions:it is in a country in the Anglosphere-Core;it is in a high-income country;it is home to top-ranked universities and/or world-renowned research institutions;researchers affiliated with that city most intensely collaborate with researchers affiliated with cities in the United States,Germany,England,France,Canada,Australia,and Italy;and the most productive scientific disciplines of highly cited articles are published in high-impact multidisciplinary journals,disciplines in health sciences(especially general internal medicine and oncology),and disciplines in natural sciences(especially physics,astronomy,and astrophysics).Research limitations:It is always problematic to demarcate the boundaries of cities(e.g.,New York City vs.Greater New York),and regarding this issue there is no consensus among researchers.The Web of Science presents the name of cities in the addresses reported by theauthors of publications.In this paper cities correspond to the spatial units between the country/state level and the institution level as indicated in the Web of Science.Furthermore,it is necessary to highlight that the Web of Science is biased towards English-language journals and journals published in the field of biomedicine.These facts may influence the outcome of the research.Practical implications:Publishing efficiency,as an indicator,shows how successful a city is at the production of science.Naturally,cities have limited opportunities to compete for components of the science establishment(e.g.,universities,hospitals).However,cities can compete to attract innovation-oriented companies,high tech firms,and R&D facilities of multinational companies by for example establishing science parks.The positive effect of this process on the city's performance in science can be observed in the example of Beijing,which publishing efficiency has been increased rapidly.Originality/value:Previous scientometric studies have examined cities'publication output in terms of the number of papers,or the number of highly cited papers,which are largely size dependent indicators;however this paper attempts to present a more quality-based approach.
文摘Over the past decade, the Journal of Natural Gas Chem- istry has become more and more international and has received large numbers of manuscripts concerning energy chemistry. In deed, nowadays energy chemistry is becoming one of the hot topics. To extensively report the most important and latest devel- opments in energy chemistry, the journal has renamed as Jour- nal of Energy Chemistry from January 2013. The main contents include new developments in fields of optimized chemical utiliza- tion of both conventional and unconventional fossil energies; re- search and utilization of hydrogen energy; conversion and stor- age of electrochemical energy; capturing, storage and chemi- cal utilization of C02; new materials and nanotechnologies re- lated to energy utilization; chemical conversion of biomasses; and chemical approaches related to photo-catalysis, and so on.
文摘Scientific journals are more likely to publish those articles which will be highly cited after theirpublication. To improve the quality and the impact of the Chinese Medical Journal （CMJ）, the distribution of highly cited articles published in CMJ in 2010 was analyzed and reported in this article.
基金support from the Natural Science Foundation of Hebei Province(Grant Nos.B2019202289,B2019202199)‘Hundred Talents Program’of Hebei Province(Grant NO.E2019050013)the National Natural Science Foundation of China(Grant No.21908039).
文摘Lithium-sulfur batteries have been regarded as the next-generation rechargeable batteries due to their high theoretical energy density and specific capacity.Nevertheless,the shuttle effect of lithium polysulfides has hindered the development of lithium-sulfur batteries.Herein,a novel zirconium-based metal-organic framework-801 film on carbon cloth was developed as a versatile interlayer for lithium-sulfur batteries.This interlayer has a hierarchical porous structure,suitable for the immobilization of lithium polysulfides and accommodating volume expansion on cycling.Moreover,the MOF-801 material is capable of strongly adsorbing lithium polysulfides and promoting their catalytic conversion,which can be enhanced by the abundant active sites provided by the continuous structure of the MOF-801 films.Based on the above advantages,the lithium-sulfur battery,with the proposed interlayer,delivers an initial discharge capacity of 927 mAh·g^(-1) at 1 C with an extremely low decay rate of 0.04%over 500 cycles.Additionally,a high area capacity of 4.3 mAh·cm^(-2) can be achieved under increased S loading.
