Purpose:Elaboration of an indicator to include the dynamic aspect of citations in bibliometric indexes.Design/methodology/approach:A new bibliometric methodology—the f^2-index—is applied at the career level and at t...Purpose:Elaboration of an indicator to include the dynamic aspect of citations in bibliometric indexes.Design/methodology/approach:A new bibliometric methodology—the f^2-index—is applied at the career level and at the level of the recent 5 years to analyze the dynamic aspect of bibliometrics.The method is applied,as an illustration,to the field of corporate governance.Findings:The compound F^2-index as an extension of the f^2-index recognizes past achievements but also values new research work with potential.The method is extended to the h-index and the h^2-index.An activity index is defined as the ratio between the recent h'-index to the career h-index.Research limitations:The compound F^2 and H-indexes are PAC,probably approximately correct,and depend on the selection and database.Practical implications:The F^2-and H compound indexes allow identifying the rising stars of a field from a dynamic perspective.The activity ratio highlights the contribution of younger researchers.Originality/value:The new methodology demonstrates the underestimated dynamic capacity of bibliometric research.展开更多
以上海交通大学的Academic Ranking of World University(ARWU)人文社会科学领域排名前50位的研究机构为研究对象,以Web of Science为统计数据来源,应用统计学原理和方法分析h-index与ARWU排名中的各项评价指标以及与传统的文献计量指...以上海交通大学的Academic Ranking of World University(ARWU)人文社会科学领域排名前50位的研究机构为研究对象,以Web of Science为统计数据来源,应用统计学原理和方法分析h-index与ARWU排名中的各项评价指标以及与传统的文献计量指标之间的关联性,结果表明:h-index与ARWU的核心指标、与论文发表总数和被引频次都有着很强的关联性,总被引频次和单篇引用频次分别符合Hirsch模型和Glanzel-Shubert模型,并实际计算出两个模型中的参数α和c。总之,为h-index在人文社会科学领域的适用性研究提供进一步的实证。展开更多
以Web of Science和JCR为数据来源,借助于h-index、五年期影响因子(IF5)和某一期刊的hindex所涵盖的所有论文的被引频次密度中位数hTci-median 3个指标,通过对物理、生命医学基础、财经和社会科学领域在JCR2010年引证报告中IF5排名前50...以Web of Science和JCR为数据来源,借助于h-index、五年期影响因子(IF5)和某一期刊的hindex所涵盖的所有论文的被引频次密度中位数hTci-median 3个指标,通过对物理、生命医学基础、财经和社会科学领域在JCR2010年引证报告中IF5排名前50的期刊的统计分析,确认它们在各自学科期刊中的核心地位,提出对个刊进行三段式评估的途径。此外,用大量的数据深入揭示h-index和IF5及新指标hTci-median在期刊评价中的内涵和属性区别,表明hTci-median成为一个新的期刊评价指标的科学性。展开更多
Based on the foundation laid by the h-index we introduce and study the R- and AR-indices. These new indices eliminate some of the disadvantages of the h-index, especially when they are used in combina-tion with the h-...Based on the foundation laid by the h-index we introduce and study the R- and AR-indices. These new indices eliminate some of the disadvantages of the h-index, especially when they are used in combina-tion with the h-index. The R-index measures the h-core’s citation intensity, while AR goes one step further and takes the age of publications into account. This allows for an index that can actually in-crease and decrease over time. We propose the pair (h, AR) as a meaningful indicator for research evaluation. We further prove a relation characterizing the h-index in the power law model.展开更多
Purpose:Generally,the scientific comparison has been done with the help of the overall impact of scholars.Although it is very easy to compare scholars,but how can we assess the scientific impact of scholars who have d...Purpose:Generally,the scientific comparison has been done with the help of the overall impact of scholars.Although it is very easy to compare scholars,but how can we assess the scientific impact of scholars who have different research careers?It is very obvious,the scholars may gain a high impact if they have more research experience or have spent more time(in terms of research career in a year).Then we cannot compare two scholars who have different research careers.Many bibliometrics indicators address the time-span of scholars.In this series,the h-index sequence and EM/EM’-index sequence have been introduced for assessment and comparison of the scientific impact of scholars.The h-index sequence,EM-index sequence,and EM’-index sequence consider the yearly impact of scholars,and comparison is done by the index value along with their component value.The time-series indicators fail to give a comparative analysis between senior and junior scholars if there is a huge difference in both scholars’research careers.Design/methodology/approach:We have proposed the cumulative index calculation method to appraise the scientific impact of scholars till that age and tested it with 89 scholars data.Findings:The proposed mechanism is implemented and tested on 89 scholars’publication data,providing a clear difference between the scientific impact of two scholars.This also helps in predicting future prominent scholars based on their research impact.Research limitations:This study adopts a simplistic approach by assigning equal credit to all authors,regardless of their individual contributions.Further,the potential impact of career breaks on research productivity is not taken into account.These assumptions may limit the generalizability of our findings Practical implications:The proposed method can be used by respected institutions to compare their scholars impact.Funding agencies can also use it for similar purposes.Originality/value:This research adds to the existing literature by introducing a novel methodology for comparing the scientific impact of scholars.The outcomes of this research have notable implications for the development of more precise and unbiased research assessment frameworks,enabling a more equitable evaluation of scholarly contributions.展开更多
目的分析老年H型高血压患者身体质量指数(Body Mass Index,BMI)与肌少症(Sarcopenia,SA)的关系,探讨BMI对SA的诊断价值并确定其诊断截断值。方法以参与成都某社区卫生服务中心年度体检的≥65岁老年H型高血压患者为研究对象,以2019年亚...目的分析老年H型高血压患者身体质量指数(Body Mass Index,BMI)与肌少症(Sarcopenia,SA)的关系,探讨BMI对SA的诊断价值并确定其诊断截断值。方法以参与成都某社区卫生服务中心年度体检的≥65岁老年H型高血压患者为研究对象,以2019年亚洲肌少症诊断共识(AWGS 2019)标准进行肌少症诊断,采用类病例对照设计,使用多因素条件Logistic回归分析了解BMI对SA的影响,用ROC曲线分析BMI对SA的诊断价值及确定最佳截断值。结果纳入的191例研究对象中,合并肌少症者93例,SA检出率48.69%。体形消瘦、正常、超重、肥胖者肌少症检出率依次为:100.0%,72.2%、23.4%和6.7%。BMI值高是肌少症的保护因素(P<0.05),与消瘦者相比,体型正常者罹患肌少症的风险降低27.8%。男性和女性中BMI诊断SA的AUC分别为0.861(95%CI:0.783~0.938)和0.828(95%CI:0.748~0.909),灵敏度和特异度分别为85.1%、65.2%和76.7%、89.1%,最佳截断值分别为23.60 kg/m2和22.85 kg/m2。结论BMI值越大患SA的风险越低,将BMI用于诊断SA有较好的价值。展开更多
文摘Purpose:Elaboration of an indicator to include the dynamic aspect of citations in bibliometric indexes.Design/methodology/approach:A new bibliometric methodology—the f^2-index—is applied at the career level and at the level of the recent 5 years to analyze the dynamic aspect of bibliometrics.The method is applied,as an illustration,to the field of corporate governance.Findings:The compound F^2-index as an extension of the f^2-index recognizes past achievements but also values new research work with potential.The method is extended to the h-index and the h^2-index.An activity index is defined as the ratio between the recent h'-index to the career h-index.Research limitations:The compound F^2 and H-indexes are PAC,probably approximately correct,and depend on the selection and database.Practical implications:The F^2-and H compound indexes allow identifying the rising stars of a field from a dynamic perspective.The activity ratio highlights the contribution of younger researchers.Originality/value:The new methodology demonstrates the underestimated dynamic capacity of bibliometric research.
文摘以上海交通大学的Academic Ranking of World University(ARWU)人文社会科学领域排名前50位的研究机构为研究对象,以Web of Science为统计数据来源,应用统计学原理和方法分析h-index与ARWU排名中的各项评价指标以及与传统的文献计量指标之间的关联性,结果表明:h-index与ARWU的核心指标、与论文发表总数和被引频次都有着很强的关联性,总被引频次和单篇引用频次分别符合Hirsch模型和Glanzel-Shubert模型,并实际计算出两个模型中的参数α和c。总之,为h-index在人文社会科学领域的适用性研究提供进一步的实证。
文摘以Web of Science和JCR为数据来源,借助于h-index、五年期影响因子(IF5)和某一期刊的hindex所涵盖的所有论文的被引频次密度中位数hTci-median 3个指标,通过对物理、生命医学基础、财经和社会科学领域在JCR2010年引证报告中IF5排名前50的期刊的统计分析,确认它们在各自学科期刊中的核心地位,提出对个刊进行三段式评估的途径。此外,用大量的数据深入揭示h-index和IF5及新指标hTci-median在期刊评价中的内涵和属性区别,表明hTci-median成为一个新的期刊评价指标的科学性。
基金Supported by a Major State Basic Research Special Program China under grant (No. 2004CCC00400)National Natural Science Foundation of China (Grant No. 70376019)
文摘Based on the foundation laid by the h-index we introduce and study the R- and AR-indices. These new indices eliminate some of the disadvantages of the h-index, especially when they are used in combina-tion with the h-index. The R-index measures the h-core’s citation intensity, while AR goes one step further and takes the age of publications into account. This allows for an index that can actually in-crease and decrease over time. We propose the pair (h, AR) as a meaningful indicator for research evaluation. We further prove a relation characterizing the h-index in the power law model.
文摘Purpose:Generally,the scientific comparison has been done with the help of the overall impact of scholars.Although it is very easy to compare scholars,but how can we assess the scientific impact of scholars who have different research careers?It is very obvious,the scholars may gain a high impact if they have more research experience or have spent more time(in terms of research career in a year).Then we cannot compare two scholars who have different research careers.Many bibliometrics indicators address the time-span of scholars.In this series,the h-index sequence and EM/EM’-index sequence have been introduced for assessment and comparison of the scientific impact of scholars.The h-index sequence,EM-index sequence,and EM’-index sequence consider the yearly impact of scholars,and comparison is done by the index value along with their component value.The time-series indicators fail to give a comparative analysis between senior and junior scholars if there is a huge difference in both scholars’research careers.Design/methodology/approach:We have proposed the cumulative index calculation method to appraise the scientific impact of scholars till that age and tested it with 89 scholars data.Findings:The proposed mechanism is implemented and tested on 89 scholars’publication data,providing a clear difference between the scientific impact of two scholars.This also helps in predicting future prominent scholars based on their research impact.Research limitations:This study adopts a simplistic approach by assigning equal credit to all authors,regardless of their individual contributions.Further,the potential impact of career breaks on research productivity is not taken into account.These assumptions may limit the generalizability of our findings Practical implications:The proposed method can be used by respected institutions to compare their scholars impact.Funding agencies can also use it for similar purposes.Originality/value:This research adds to the existing literature by introducing a novel methodology for comparing the scientific impact of scholars.The outcomes of this research have notable implications for the development of more precise and unbiased research assessment frameworks,enabling a more equitable evaluation of scholarly contributions.
