Modeling and Analysis of Scholar Mobility on Scientific Landscape

Charting mobility patterns in the scientific knowledge landscape

From small steps to great leaps, metaphors of spatial mobility abound to describe discovery processes. Here, we ground these ideas in formal terms by systematically studying scientific knowledge mobility patterns. We use low-dimensional embedding techniques to create a knowledge space made up of 1.5 million articles from the fields of physics, computer science, and mathematics. By analyzing the publication histories of individual researchers, we discover patterns of knowledge mobility that closely resemble physical mobility. In aggregate, the trajectories form mobility flows that can be descri…

前线与断层：俄乌冲突如何重塑科研格局

Frontlines and faultlines: How the Russo-Ukrainian conflict reshapes the landscape of scientific research

本研究通过分析2000-2023年超过180万篇论文、100万学者和2300所机构的数据，追踪学者迁移、研究主题和国际合作网络的变化，揭示了俄乌冲突（特别是2014年和2022年升级）对两国学术生态的破坏性影响，包括人才流失、研究领域分化、全球合作网络重组以及学者职业挑战。

Social media and mobility landscape: uncovering spatial patterns of urban human mobility with multi source data

In this paper, we present a three-step methodological framework, including location identification, bias modification, and out-of-sample validation, so as to promote human mobility analysis with social media data. More specifically, we propose ways of identifying personal activity-specific places and commuting patterns in Beijing, China, based on Weibo (China's Twitter) check-in records, as well as modifying sample bias of check-in data with population synthesis technique. An independent citywide travel logistic survey is used as the benchmark for validating the results. Obvious differences ar…

潜在景观揭示城市流动的时空结构：东京在疫情前和疫情期间的Hodge分解与主成分分析

Potential Landscapes Reveal Spatiotemporal Structure in Urban Mobility: Hodge Decomposition and Principal Component Analysis of Tokyo Before and During COVID-19

本研究通过Hodge分解和PCA分析东京疫情期间的交通流动，揭示了时空结构变化，为城市规划和公共卫生提供新视角。

Eugene Garfield's Scholarly Impact: A Scientometric Review

The concept of citation indexing has become deeply involved in many parts of research itself and the broad environment in which research plays an integral role, ranging from research evaluation, numerous indicators, to an increasingly wider range of scientific disciplines. In this article, we pay tribute to Eugene Garfield and present a scientometric review of the intellectual assets that he brought to us. In addition, we explore the intellectual landscape that has subsequently evolved in connection to many of his ideas. We illustrate what systematic reviews of the scientific literature may re…

Driving forces in researchers mobility

Starting from the dataset of the publication corpus of the APS during the period 1955-2009, we reconstruct the individual researchers trajectories, namely the list of the consecutive affiliations for each scholar. Crossing this information with different geographic datasets we embed these trajectories in a spatial framework. Using methods from network theory and complex systems analysis we characterise these patterns in terms of topological network properties and we analyse the dependence of an academic path across different dimensions: the distance between two subsequent positions, the relati…