This map shows the geographic impact of J. I. Leonard's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by J. I. Leonard with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J. I. Leonard more than expected).
This network shows the impact of papers produced by J. I. Leonard. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by J. I. Leonard. The network helps show where J. I. Leonard may publish in the future.
Co-authorship network of co-authors of J. I. Leonard
This figure shows the co-authorship network connecting the top 25 collaborators of J. I. Leonard.
A scholar is included among the top collaborators of J. I. Leonard based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with J. I. Leonard. J. I. Leonard is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Leonard, J. I., R. J. White, & J. A. Rummel. (1986). Math modelling as a complement to the scientific inquiry of physiological adaptation to space flight: Fluid, endocrine and circulatory regulation. NASA Technical Reports Server (NASA).
Leonard, J. I.. (1984). Mathematical modeling of fluid-electrolyte alterations during weightlessness. NASA STI Repository (National Aeronautics and Space Administration).
6.
Leonard, J. I.. (1983). Causes and consequences of reduced blood volume in space flight - A multi-discipline modeling study. NASA Technical Reports Server (NASA).1 indexed citations
7.
Leonard, J. I.. (1982). Energy balance and the composition of weight loss during prolonged space flight. NASA STI Repository (National Aeronautics and Space Administration).4 indexed citations
8.
Leonard, J. I., C. S. Leach, & J. A. Rummel. (1982). Computer simulations of postural change, water immersion and bedrest - An integrative approach for understanding the spaceflight response. NASA Technical Reports Server (NASA).1 indexed citations
9.
Leonard, J. I.. (1982). Computer simulation analysis of the behavior of renal-regulating hormones during hypogravic stress. NASA Technical Reports Server (NASA).5 indexed citations
10.
Leonard, J. I., et al.. (1981). Dynamic regulation of erythropoiesis: a computer model of general applicability.. PubMed. 9(4). 355–78.6 indexed citations
Leonard, J. I., C. S. Leach, & J. A. Rummel. (1979). Computer simulations of postural change, water immersion and bedrest: an integrative approach for understanding the spaceflight response.. PubMed. 22(6). S31–2.4 indexed citations
13.
Leonard, J. I., et al.. (1978). Development of an hypothesis for simulating anti-orthostatic bed rest. NASA Technical Reports Server (NASA).
14.
Rambaut, P. C., C. S. Leach, & J. I. Leonard. (1977). Observations in energy balance in man during spaceflight. American Journal of Physiology-Regulatory, Integrative and Comparative Physiology. 233(5). R208–R212.56 indexed citations
15.
Leonard, J. I.. (1977). Improvements and validation of the erythropoiesis control model for bed rest simulation. NASA STI Repository (National Aeronautics and Space Administration).1 indexed citations
16.
Leonard, J. I.. (1977). Skylab water balance analysis. NASA STI Repository (National Aeronautics and Space Administration).2 indexed citations
17.
Leonard, J. I.. (1977). Analysis of evaporative water loss in the Skylab astronauts. NASA STI Repository (National Aeronautics and Space Administration).1 indexed citations
18.
Leonard, J. I.. (1976). Validation of a model for investigating red cell mass changes during weightlessness. NASA STI Repository (National Aeronautics and Space Administration).2 indexed citations
19.
Leonard, J. I., et al.. (1975). Study report on interfacing major physiological subsystem models: An approach for developing a whole-body algorithm. NASA Technical Reports Server (NASA).1 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.