E.P. Ryan

4.6k total citations
115 papers, 3.4k citations indexed

About

E.P. Ryan is a scholar working on Control and Systems Engineering, Numerical Analysis and Statistical and Nonlinear Physics. According to data from OpenAlex, E.P. Ryan has authored 115 papers receiving a total of 3.4k indexed citations (citations by other indexed papers that have themselves been cited), including 105 papers in Control and Systems Engineering, 17 papers in Numerical Analysis and 14 papers in Statistical and Nonlinear Physics. Recurrent topics in E.P. Ryan's work include Stability and Controllability of Differential Equations (60 papers), Adaptive Control of Nonlinear Systems (46 papers) and Stability and Control of Uncertain Systems (36 papers). E.P. Ryan is often cited by papers focused on Stability and Controllability of Differential Equations (60 papers), Adaptive Control of Nonlinear Systems (46 papers) and Stability and Control of Uncertain Systems (36 papers). E.P. Ryan collaborates with scholars based in United Kingdom, United States and Germany. E.P. Ryan's co-authors include Achim Ilchmann, Hartmut Logemann, Chris Sangwin, Bayu Jayawardhana, M. Corless, G. Leitmann, Stephan Trenn, José Rodellar, Stuart Townley and A. Steinberg and has published in prestigious journals such as IEEE Transactions on Automatic Control, Automatica and Computer Physics Communications.

In The Last Decade

E.P. Ryan

107 papers receiving 3.2k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
E.P. Ryan United Kingdom 32 3.0k 402 395 341 263 115 3.4k
Rama K. Yedavalli United States 25 1.6k 0.5× 365 0.9× 187 0.5× 301 0.9× 213 0.8× 164 2.2k
Andy Packard United States 28 3.3k 1.1× 429 1.1× 138 0.3× 511 1.5× 323 1.2× 64 3.9k
L.H. Keel United States 20 2.0k 0.7× 316 0.8× 288 0.7× 120 0.4× 148 0.6× 133 2.4k
Achim Ilchmann Germany 29 2.6k 0.9× 467 1.2× 385 1.0× 177 0.5× 311 1.2× 120 3.1k
Joseph Bentsman United States 24 1.9k 0.7× 294 0.7× 364 0.9× 179 0.5× 359 1.4× 176 2.8k
Jean Lévine France 18 3.4k 1.1× 186 0.5× 240 0.6× 425 1.2× 544 2.1× 57 4.1k
Sabine Mondié Mexico 26 2.4k 0.8× 412 1.0× 770 1.9× 113 0.3× 236 0.9× 191 3.0k
C.D. Johnson United States 21 1.7k 0.6× 310 0.8× 123 0.3× 356 1.0× 161 0.6× 129 2.1k
J.D. Aplevich Canada 14 1.2k 0.4× 309 0.8× 167 0.4× 220 0.6× 140 0.5× 45 1.8k
Yury Orlov Mexico 34 3.6k 1.2× 736 1.8× 739 1.9× 239 0.7× 330 1.3× 176 4.0k

Countries citing papers authored by E.P. Ryan

Since Specialization
Citations

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

Fields of papers citing papers by E.P. Ryan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by E.P. Ryan. 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 E.P. Ryan. The network helps show where E.P. Ryan may publish in the future.

Co-authorship network of co-authors of E.P. Ryan

This figure shows the co-authorship network connecting the top 25 collaborators of E.P. Ryan. A scholar is included among the top collaborators of E.P. Ryan 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 E.P. Ryan. E.P. Ryan 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.
Jayawardhana, Bayu, Hartmut Logemann, & E.P. Ryan. (2008). The Circle Criterion and Input-to-State Stability for Infinite-Dimensional Systems. University of Groningen research database (University of Groningen / Centre for Information Technology). 1 indexed citations
2.
Ilchmann, Achim & E.P. Ryan. (2008). High‐gain control without identification: a survey. GAMM-Mitteilungen. 31(1). 115–125. 90 indexed citations
3.
Ilchmann, Achim & E.P. Ryan. (2006). Adaptive and non-adaptive control without identification: a survey. Common Library Network (Der Gemeinsame Bibliotheksverbund). 1 indexed citations
4.
Logemann, Hartmut & E.P. Ryan. (2003). Non-autonomous systems: asymptotic behaviour and weak invariance principles. Journal of Differential Equations. 189(2). 440–460. 14 indexed citations
5.
Logemann, Hartmut & E.P. Ryan. (2003). Systems with hysteresis in the feedback loop: existence, regularity and asymptotic behaviour of solutions. ESAIM Control Optimisation and Calculus of Variations. 9. 169–196. 32 indexed citations
6.
Logemann, Hartmut, et al.. (2001). Low-Gain Integral Control of Well-Posed Linear Infinite-Dimensional Systems with Input and Output Nonlinearities. Journal of Mathematical Analysis and Applications. 261(1). 307–336. 7 indexed citations
7.
Logemann, Hartmut, et al.. (2001). Adaptive low-gain integral control of linear systems with input and output nonlinearities. Systems & Control Letters. 44(1). 1–12. 3 indexed citations
8.
Logemann, Hartmut & E.P. Ryan. (2000). Time-Varying and Adaptive Integral Control of Infinite-Dimensional Regular Linear Systems with Input Nonlinearities. SIAM Journal on Control and Optimization. 38(4). 1120–1144. 27 indexed citations
9.
Logemann, Hartmut, E.P. Ryan, & Stuart Townley. (1998). Integral Control of Infinite-Dimensional Linear Systems Subject to Input Saturation. SIAM Journal on Control and Optimization. 36(6). 1940–1961. 23 indexed citations
10.
Ryan, E.P.. (1995). Universal stabilization of a class of nonlinear systems with homogeneous vector fields. Systems & Control Letters. 26(3). 177–184. 54 indexed citations
11.
Barbat, Horia Alejandro Barbat, et al.. (1994). Seismic performance of buildings with a class of adaptive nonlinear hybrid systems. 1(1-2). 117–141. 1 indexed citations
12.
Rodellar, José, G. Leitmann, & E.P. Ryan. (1993). Output feedback control of uncertain coupled systems. International Journal of Control. 58(2). 445–457. 20 indexed citations
13.
Ryan, E.P.. (1991). Finite-time stabilization of uncertain nonlinear planar systems. 1(1). 83–94. 49 indexed citations
14.
Leitmann, G. & E.P. Ryan. (1987). Output Feedback Control of a Class of Singularly Perturbed Uncertain Dynamical Systems. American Control Conference. 24(24). 1590–1594. 8 indexed citations
15.
Corless, M., et al.. (1985). Model-Following Controls for a Class of Uncertain Dynamical Systems. IFAC Proceedings Volumes. 18(5). 1895–1899. 17 indexed citations
16.
Ryan, E.P.. (1980). On the sensitivity of a time-optimal switching function. IEEE Transactions on Automatic Control. 25(2). 275–277. 14 indexed citations
17.
Ichikawa, A. & E.P. Ryan. (1979). Sensor and controller location problems for distributed parameter systems. Automatica. 15(3). 347–352. 17 indexed citations
18.
Ryan, E.P.. (1978). Quasi-Time-Optimal Feedback Control of Some Fifth-Order Systems. Journal of Dynamic Systems Measurement and Control. 100(3). 201–208.
19.
Ryan, E.P.. (1977). Minimum-time isochronal surfaces for certain third-order systems. International Journal of Control. 26(3). 421–443. 1 indexed citations
20.
Ryan, E.P.. (1976). Time-optimal control of certain plants with positive real eigenvalues. International Journal of Control. 23(6). 775–783.

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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