Helena Maria Wilhelm

854 total citations
31 papers, 650 citations indexed

About

Helena Maria Wilhelm is a scholar working on Electrical and Electronic Engineering, Materials Chemistry and Polymers and Plastics. According to data from OpenAlex, Helena Maria Wilhelm has authored 31 papers receiving a total of 650 indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Electrical and Electronic Engineering, 15 papers in Materials Chemistry and 9 papers in Polymers and Plastics. Recurrent topics in Helena Maria Wilhelm's work include Power Transformer Diagnostics and Insulation (15 papers), High voltage insulation and dielectric phenomena (11 papers) and Polymer Nanocomposites and Properties (6 papers). Helena Maria Wilhelm is often cited by papers focused on Power Transformer Diagnostics and Insulation (15 papers), High voltage insulation and dielectric phenomena (11 papers) and Polymer Nanocomposites and Properties (6 papers). Helena Maria Wilhelm collaborates with scholars based in Brazil, Germany and United States. Helena Maria Wilhelm's co-authors include Luiz Pereira Ramos, Emir B. Saad, Maria I. Felisberti, Maria Aparecida F. César‐Oliveira, Hans‐Werner Schock, Roland Scheer, Rilton Alves de Freitas, Tania Mari Bellé Bresolin, Maria Rita Sierakowski and Clóvis Antônio Rodrigues and has published in prestigious journals such as Journal of Applied Physics, Bioresource Technology and Solar Energy Materials and Solar Cells.

In The Last Decade

Helena Maria Wilhelm

30 papers receiving 618 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Helena Maria Wilhelm Brazil 11 331 156 154 142 116 31 650
F. S. M. Sinfrônio Brazil 15 307 0.9× 85 0.5× 132 0.9× 266 1.9× 70 0.6× 29 668
Seong‐Youl Bae South Korea 14 441 1.3× 53 0.3× 220 1.4× 114 0.8× 125 1.1× 31 693
Constanţa Ibănescu Romania 14 282 0.9× 70 0.4× 181 1.2× 115 0.8× 28 0.2× 54 665
Ary S. Maia Brazil 15 182 0.5× 113 0.7× 93 0.6× 266 1.9× 40 0.3× 34 573
Yujuan Cao China 18 212 0.6× 246 1.6× 129 0.8× 326 2.3× 142 1.2× 33 1.0k
Roberlúcia Araújo Candeia Brazil 11 522 1.6× 61 0.4× 279 1.8× 280 2.0× 91 0.8× 22 940
Titus Sobisch United States 11 138 0.4× 80 0.5× 57 0.4× 216 1.5× 64 0.6× 27 735
A. Ramasubbu India 10 322 1.0× 41 0.3× 221 1.4× 99 0.7× 74 0.6× 22 503
Ianatul Khoiroh Malaysia 14 164 0.5× 62 0.4× 93 0.6× 116 0.8× 130 1.1× 48 691
Victor T. Wyatt United States 13 306 0.9× 23 0.1× 116 0.8× 64 0.5× 111 1.0× 32 569

Countries citing papers authored by Helena Maria Wilhelm

Since Specialization
Citations

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

Fields of papers citing papers by Helena Maria Wilhelm

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Helena Maria Wilhelm. 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 Helena Maria Wilhelm. The network helps show where Helena Maria Wilhelm may publish in the future.

Co-authorship network of co-authors of Helena Maria Wilhelm

This figure shows the co-authorship network connecting the top 25 collaborators of Helena Maria Wilhelm. A scholar is included among the top collaborators of Helena Maria Wilhelm 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 Helena Maria Wilhelm. Helena Maria Wilhelm 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
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Bender, Vitor C., et al.. (2022). Artificial Neural Networks Application for Top Oil Temperature and Loss of Life Prediction in Power Transformers. Electric Power Components and Systems. 50(11-12). 549–560. 5 indexed citations
4.
Wilhelm, Helena Maria, et al.. (2021). Initial investigation of a thermal performance qualification method for transformer insulating liquids. 107–111. 2 indexed citations
5.
Wilhelm, Helena Maria, et al.. (2020). Power Transformer Fault Characterization Through Oil Contaminants Evaluation. 335–339. 1 indexed citations
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Wilhelm, Helena Maria, et al.. (2018). Thermal Faults Involving Thermally Upgraded Kraft Paper. 21. 1–4. 1 indexed citations
10.
Wilhelm, Helena Maria, et al.. (2015). Accelerated aging of so<sub>2</sub> switchgear seals. IEEE Electrical Insulation Magazine. 32(1). 21–27. 1 indexed citations
11.
Wilhelm, Helena Maria, Hans‐Werner Schock, & Roland Scheer. (2011). Interface recombination in heterojunction solar cells: Influence of buffer layer thickness. Journal of Applied Physics. 109(8). 84514–84514. 56 indexed citations
12.
Marsen, Björn, Helena Maria Wilhelm, Iver Lauermann, et al.. (2010). Effects of Ti-incorporation in CuInS2 solar cells. Solar Energy Materials and Solar Cells. 94(10). 1730–1733. 30 indexed citations
13.
César‐Oliveira, Maria Aparecida F., et al.. (2007). Ethanolysis of Refined Soybean Oil Assisted by Sodium and Potassium Hydroxides. Journal of the American Oil Chemists Society. 84(4). 385–392. 96 indexed citations
14.
Saad, Emir B., et al.. (2007). Optimization of the ethanolysis of Raphanus sativus (L. Var.) crude oil applying the response surface methodology. Bioresource Technology. 99(6). 1837–1845. 113 indexed citations
15.
Wilhelm, Helena Maria, et al.. (2007). Colorimetric methodology for monitoring the cellulose insulating paper degradation in electrical equipments filled with mineral oil. Cellulose. 15(3). 497–505. 6 indexed citations
16.
Freitas, Rilton Alves de, et al.. (2006). Films of chitosan and N‐carboxymethylchitosan. Part II: effect of plasticizers on their physiochemical properties. Polymer International. 55(8). 970–977. 19 indexed citations
17.
Wilhelm, Helena Maria & Maria I. Felisberti. (2002). Reactive compatibilization of maleated polypropylene and maleated poly(styrene‐b‐butadiene‐b‐styrene) blends. Journal of Applied Polymer Science. 86(2). 366–371. 8 indexed citations
18.
Wilhelm, Helena Maria & Maria I. Felisberti. (2002). Morphology and mechanical properties of polypropylene/maleated styrene–butadiene–styrene triblock copolymer blends. Journal of Applied Polymer Science. 86(2). 359–365. 14 indexed citations
19.
Wilhelm, Helena Maria & Maria I. Felisberti. (2002). Bulk modification of styrene–butadiene–styrene triblock copolymer with maleic anhydride. Journal of Applied Polymer Science. 83(13). 2953–2960. 15 indexed citations
20.
Wilhelm, Helena Maria & Maria I. Felisberti. (2002). Blends of i‐PP and SBS. II. Influence of in situ compatibilization on the mechanical properties. Journal of Applied Polymer Science. 87(3). 516–522. 13 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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