Velautham Sivakumar

423 total citations
22 papers, 315 citations indexed

About

Velautham Sivakumar is a scholar working on Molecular Biology, Cellular and Molecular Neuroscience and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Velautham Sivakumar has authored 22 papers receiving a total of 315 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Molecular Biology, 6 papers in Cellular and Molecular Neuroscience and 6 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Velautham Sivakumar's work include Photosynthetic Processes and Mechanisms (9 papers), Photoreceptor and optogenetics research (6 papers) and Spectroscopy and Quantum Chemical Studies (6 papers). Velautham Sivakumar is often cited by papers focused on Photosynthetic Processes and Mechanisms (9 papers), Photoreceptor and optogenetics research (6 papers) and Spectroscopy and Quantum Chemical Studies (6 papers). Velautham Sivakumar collaborates with scholars based in United States, Sri Lanka and Australia. Velautham Sivakumar's co-authors include Gary Hastings, Ruili Wang, P. K. D. D. P. Pitigala, K. Tennakone, P.M. Sirimanne, M. K. Indika Senevirathna, E.V.A. Premalal, T. Wade Johnson, Kevin Redding and Yajing Li and has published in prestigious journals such as Biochemistry, Biophysical Journal and RSC Advances.

In The Last Decade

Velautham Sivakumar

20 papers receiving 297 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Velautham Sivakumar United States 10 169 114 112 89 64 22 315
James O. Sullivan United States 6 262 1.6× 72 0.6× 155 1.4× 62 0.7× 91 1.4× 6 385
Yoshinori Kakitani Japan 12 244 1.4× 54 0.5× 159 1.4× 81 0.9× 121 1.9× 23 363
Nina Ponomarenko United States 11 236 1.4× 82 0.7× 138 1.2× 25 0.3× 75 1.2× 26 334
Smitha Pillai United States 10 192 1.1× 70 0.6× 122 1.1× 35 0.4× 121 1.9× 12 335
Zeus Pendon United States 9 383 2.3× 75 0.7× 178 1.6× 81 0.9× 114 1.8× 10 539
Stephanie M. Hart United States 10 136 0.8× 41 0.4× 119 1.1× 40 0.4× 97 1.5× 17 340
Matteo Capone Italy 10 283 1.7× 124 1.1× 172 1.5× 84 0.9× 69 1.1× 21 378
Sangmoon Lhee United States 7 238 1.4× 27 0.2× 54 0.5× 77 0.9× 58 0.9× 8 352
Martin P. Debreczeny United States 9 274 1.6× 95 0.8× 117 1.0× 102 1.1× 221 3.5× 25 586
Florian Ehlers Germany 10 169 1.0× 35 0.3× 139 1.2× 44 0.5× 97 1.5× 18 380

Countries citing papers authored by Velautham Sivakumar

Since Specialization
Citations

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

Fields of papers citing papers by Velautham Sivakumar

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Velautham Sivakumar. 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 Velautham Sivakumar. The network helps show where Velautham Sivakumar may publish in the future.

Co-authorship network of co-authors of Velautham Sivakumar

This figure shows the co-authorship network connecting the top 25 collaborators of Velautham Sivakumar. A scholar is included among the top collaborators of Velautham Sivakumar 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 Velautham Sivakumar. Velautham Sivakumar 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.
Sivakumar, Velautham, et al.. (2025). Patient‐size based dose optimization in projection radiography examinations: A BMI‐guided approach. Journal of Applied Clinical Medical Physics. 26(7). e70191–e70191.
2.
Sivakumar, Velautham, et al.. (2024). Towards the establishment of national diagnostic reference levels for abdomen, KUB, and lumbar spine x-ray examinations in Sri Lanka: a multi-centric study. Journal of Radiological Protection. 44(2). 21506–21506. 2 indexed citations
3.
Sivakumar, Velautham, et al.. (2024). Patient dose and associated exposure parameters in pelvic x-ray examinations: dependence on radiographic system. Radiation and Environmental Biophysics. 63(3). 433–442. 2 indexed citations
4.
Sivakumar, Velautham, et al.. (2023). Attenuation properties of minerals found in Sri Lanka for high-energy photons. Book of Abstracts. 7 indexed citations
5.
Sivakumar, Velautham, et al.. (2023). Towards the establishment of national diagnostic reference levels for chest x-ray examinations in Sri Lanka: a multi-centric study. Journal of Radiological Protection. 43(4). 41501–41501. 3 indexed citations
6.
Sivakumar, Velautham, et al.. (2022). Evaluation of patient doses for routine digital radiography procedures toward establishing an institutional diagnostic reference levels: A case study in Sri Lanka. Journal of Applied Clinical Medical Physics. 23(12). e13852–e13852. 5 indexed citations
7.
Earle, G. D., D. P. Drob, J. D. Huba, et al.. (2020). Observations and Modeling Studies of Solar Eclipse Effects on Oblique High Frequency Radio Propagation. Space Weather. 19(3). 3 indexed citations
8.
Ponnamma, Deepalekshmi, et al.. (2018). Laser induced periodic surface structures on nano metal oxide filled polyvinylidene fluoride nanocomposites. Optik. 176. 372–383. 7 indexed citations
9.
Sivakumar, Velautham, et al.. (2016). Photoinduced electron transfer interaction of anthraquinones with aniline quenchers: Influence of methyl substitution in aniline donors. Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy. 173. 931–938. 9 indexed citations
10.
El‐Azazy, Marwa, et al.. (2016). Interaction of p-synephrine with p-chloranil: experimental design and multiple response optimization. RSC Advances. 6(69). 64967–64976. 14 indexed citations
11.
Pitigala, P. K. D. D. P., et al.. (2007). Sensitization of TiO2 and ZnO nanocrystalline films with acriflavine. Journal of Photochemistry and Photobiology A Chemistry. 195(2-3). 364–367. 8 indexed citations
12.
Sivakumar, Velautham, et al.. (2006). Modeling the A1 binding site in photosystem. Vibrational Spectroscopy. 42(1). 78–87. 21 indexed citations
13.
Sirimanne, P.M., M. K. Indika Senevirathna, E.V.A. Premalal, et al.. (2005). Utilization of natural pigment extracted from pomegranate fruits as sensitizer in solid-state solar cells. Journal of Photochemistry and Photobiology A Chemistry. 177(2-3). 324–327. 75 indexed citations
14.
Wang, Ruili, Velautham Sivakumar, T. Wade Johnson, & Gary Hastings. (2004). FTIR Difference Spectroscopy in Combination with Isotope Labeling for Identification of the Carbonyl Modes of P700 and P700+ in Photosystem I. Biophysical Journal. 86(2). 1061–1073. 21 indexed citations
15.
Li, Yajing, Tatyana A. Konovalova, Fraser MacMillan, et al.. (2004). Mutation of the Putative Hydrogen-Bond Donor to P700 of Photosystem I. Biochemistry. 43(39). 12634–12647. 29 indexed citations
16.
Sivakumar, Velautham, Ruili Wang, & Gary Hastings. (2003). Photo-Oxidation of P740, the Primary Electron Donor in Photosystem I from Acaryochloris marina. Biophysical Journal. 85(5). 3162–3172. 30 indexed citations
17.
Wang, Ruili, Velautham Sivakumar, Yajing Li, Kevin Redding, & Gary Hastings. (2003). Mutation Induced Modulation of Hydrogen Bonding to P700 Studied Using FTIR Difference Spectroscopy. Biochemistry. 42(33). 9889–9897. 8 indexed citations
18.
Hastings, Gary & Velautham Sivakumar. (2001). Time-resolved Fourier transform infrared difference spectroscopy for the study of A1 reduction in intact photosystem I.. Science Access. 3(1). 1 indexed citations
19.
20.
Hastings, Gary, et al.. (2001). Primary Donor Photo-Oxidation in Photosystem I:  A Re-Evaluation of (P700+ − P700) Fourier Transform Infrared Difference Spectra. Biochemistry. 40(43). 12943–12949. 22 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.

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