Timothy J. Callahan

2.2k total citations
68 papers, 1.6k citations indexed

About

Timothy J. Callahan is a scholar working on Fluid Flow and Transfer Processes, Automotive Engineering and Biomedical Engineering. According to data from OpenAlex, Timothy J. Callahan has authored 68 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 25 papers in Fluid Flow and Transfer Processes, 16 papers in Automotive Engineering and 16 papers in Biomedical Engineering. Recurrent topics in Timothy J. Callahan's work include Advanced Combustion Engine Technologies (25 papers), Biodiesel Production and Applications (15 papers) and Vehicle emissions and performance (15 papers). Timothy J. Callahan is often cited by papers focused on Advanced Combustion Engine Technologies (25 papers), Biodiesel Production and Applications (15 papers) and Vehicle emissions and performance (15 papers). Timothy J. Callahan collaborates with scholars based in United States, United Kingdom and Poland. Timothy J. Callahan's co-authors include Thomas W. Ryan, John Wawrzynek, John R. Hauser, Lee G. Dodge, Seth Copen Goldstein, C. A. Moses, André DeHon, Mihai Budiu, Girish Venkataramani and Darius Mehta and has published in prestigious journals such as Environmental Health Perspectives, Optics Express and Journal of Applied Crystallography.

In The Last Decade

Timothy J. Callahan

64 papers receiving 1.4k citations

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author Last Decade Papers Cites
Timothy J. Callahan 806 557 499 451 407 68 1.6k
Mahabubul Alam 856 1.1× 879 1.6× 73 0.1× 207 0.5× 39 0.1× 53 1.8k
Liu Hu 108 0.1× 211 0.4× 24 0.0× 232 0.5× 20 0.0× 68 588
Byung Chul Choi 343 0.4× 88 0.2× 22 0.0× 338 0.7× 3 0.0× 50 1.0k
Longxiang Chen 206 0.3× 350 0.6× 7 0.0× 73 0.2× 24 0.1× 57 1.4k
Ahmed Abdelhafez 691 0.9× 112 0.2× 3 0.0× 792 1.8× 51 0.1× 92 1.2k
Brian Kaul 545 0.7× 208 0.4× 2 0.0× 356 0.8× 26 0.1× 57 851
Yue-Yun Wang 254 0.3× 105 0.2× 4 0.0× 45 0.1× 16 0.0× 71 828
Niklas Andersson 12 0.0× 268 0.5× 29 0.1× 397 0.9× 19 0.0× 129 1.1k
Ali Habibi 47 0.1× 132 0.2× 47 0.1× 172 0.4× 10 0.0× 31 640
Limin Wang 9 0.0× 214 0.4× 28 0.1× 101 0.2× 323 0.8× 63 991

Countries citing papers authored by Timothy J. Callahan

Since Specialization
Citations

This map shows the geographic impact of Timothy J. Callahan'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 Timothy J. Callahan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Timothy J. Callahan more than expected).

Fields of papers citing papers by Timothy J. Callahan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Timothy J. Callahan. 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 Timothy J. Callahan. The network helps show where Timothy J. Callahan may publish in the future.

Co-authorship network of co-authors of Timothy J. Callahan

This figure shows the co-authorship network connecting the top 25 collaborators of Timothy J. Callahan. A scholar is included among the top collaborators of Timothy J. Callahan 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 Timothy J. Callahan. Timothy J. Callahan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Gaudet, Jonathan, et al.. (2024). High-Bandwidth IJTAG over SSN. 167–176. 1 indexed citations
2.
3.
Brooks, Bryan W., et al.. (2019). Environmental Health Practice Challenges and Research Needs for U.S. Health Departments. Environmental Health Perspectives. 127(12). 125001–125001. 11 indexed citations
4.
Amatya, Devendra M., et al.. (2018). Assessment of Spatial and Temporal Variation of Potential Evapotranspiration Estimated by Four Methods for South Carolina. TigerPrints (Clemson University). 3–24. 7 indexed citations
5.
Callahan, Timothy J., et al.. (2017). Measuring and Modeling Flow Rates in Tidal Creeks: A Case Study from the Central Coast of South Carolina. TigerPrints (Clemson University). 21–39. 4 indexed citations
6.
Callahan, Timothy J., et al.. (2016). Dual Fuel Combustion Study Using 3D CFD Tool. SAE technical papers on CD-ROM/SAE technical paper series. 1. 8 indexed citations
7.
8.
Lee, Taewoo, et al.. (2013). Imaging of director fields in liquid crystals using stimulated Raman scattering microscopy. Optics Express. 21(10). 12129–12129. 8 indexed citations
9.
Callahan, Timothy J., et al.. (2006). Tartan. 163–174. 68 indexed citations
10.
Callahan, Timothy J., et al.. (2002). Technical Path Evaluation for High Efficiency, Low Emission Natural Gas Engine. Defense Technical Information Center (DTIC). 2 indexed citations
11.
Gadeken, L.L., et al.. (1996). Solvent removes downhole NORM-contaminated BaSO{sub 4} scale. Oil & gas journal. 94(17). 65–68. 5 indexed citations
12.
Callahan, Timothy J., Eric S. Swanson, & Terry P. Lybrand. (1996). MD display: An interactive graphics program for visualization of molecular dynamics trajectories. Journal of Molecular Graphics. 14(1). 39–41. 11 indexed citations
13.
Ryan, Thomas W. & Timothy J. Callahan. (1996). Homogeneous Charge Compression Ignition of Diesel Fuel. SAE technical papers on CD-ROM/SAE technical paper series. 1. 375 indexed citations
14.
Callahan, Timothy J., et al.. (1995). Free-piston engine linear generator for hybrid vehicles modeling study. 4 indexed citations
15.
Callahan, Timothy J.. (1991). Effects of gas composition on engine performance and emissions. NASA STI/Recon Technical Report N. 93. 12936. 6 indexed citations
16.
Callahan, Timothy J., et al.. (1987). Comparison of Predicted and Measured Diesel Exhaust Emission Levels During Transient Operation. SAE technical papers on CD-ROM/SAE technical paper series. 1. 3 indexed citations
17.
Ryan, Thomas W., Timothy J. Callahan, & C. A. Moses. (1983). Combustion of fourteen different vegetable oils in two different diesel engines. 20(12). 1053–1053. 3 indexed citations
18.
Callahan, Timothy J., et al.. (1983). Control of Diesel Exhaust Emissions in Underground Coal Mines - Single-Cylinder Engine Optimization for Water-in-Fuel Miscroemulsions. SAE technical papers on CD-ROM/SAE technical paper series. 6 indexed citations
19.
Callahan, Timothy J., et al.. (1982). Performance and Emissions of Ethanol and Ethanol-Diesel Blends in Direct-Injected and Pre-Chamber Diesel Engines. SAE technical papers on CD-ROM/SAE technical paper series. 1. 56 indexed citations
20.
Callahan, Timothy J., et al.. (1982). Characterization of vegetable oils for use as fuels in diesel engines. 70–81. 23 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Mahabubul Alam Breakdown of academic impact, for papers by Liu Hu Breakdown of academic impact, for papers by Byung Chul Choi Breakdown of academic impact, for papers by Longxiang Chen Breakdown of academic impact, for papers by Ahmed Abdelhafez Breakdown of academic impact, for papers by Brian Kaul Breakdown of academic impact, for papers by Yue-Yun Wang Breakdown of academic impact, for papers by Niklas Andersson Breakdown of academic impact, for papers by Ali Habibi Breakdown of academic impact, for papers by Limin Wang
Rankless by CCL
2026