1. From the Editor-in-Chief

   • Kimon P. Valavanis

   Editorial 31 August 2021 Article: 20

2. A Hybrid Planning Approach for Accompanying Information-gathering in Plan Execution Monitoring

   • Shuo Yang
   • Xinjun Mao
   • Yuhong Huang

   Regular paper 28 August 2021 Article: 19

3. Topological Map Building with Multiple Agents Having Abilities of Dropping Indexed Markers

   • Jonghoek Kim

   Short paper 27 August 2021 Article: 18

4. Image-based Action Generation Method using State Prediction and Cost Estimation Learning

   • Yu Ishihara
   • Masaki Takahashi

   Regular paper 24 August 2021 Article: 17

   

5. Maturity Levels of Public Safety Applications using Unmanned Aerial Systems: a Review

   • Merlin Stampa
   • Andreas Sutorma
   • Christof Röhrig

   Review Paper Open access 23 August 2021 Article: 16

6. Exponentially Stable Motion Control for Multirotor UAVs with Rotor Drag and Disturbance Compensation

   • Amir Moeini
   • Alan F. Lynch
   • Qing Zhao

   Regular Paper 18 August 2021 Article: 15

7. Labriform Swimming Robot with Steering and Diving Capabilities

   • Farah Abbas Naser
   • Mofeed Turky Rashid

   Short paper 18 August 2021 Article: 14

8. Comparative Analysis of Deep Neural Networks for the Detection and Decoding of Data Matrix Landmarks in Cluttered Indoor Environments

   • Tiago Almeida
   • Vitor Santos
   • Bernardo Lourenço

   Regular Paper Open access 11 August 2021 Article: 13

9. Visual Simultaneous Localization and Mapping (SLAM) Based on Blurred Image Detection

   • Huaiyuan Yu
   • Haijiang Zhu
   • Fengrong Huang

   Short paper 11 August 2021 Article: 12

10. Robust Composite-Disturbance Observer Based Flight Control of Quadrotor Attitude

    • Nigar Ahmed
    • Abid Raza
    • Rameez Khan

    Short Paper 09 August 2021 Article: 11

11. Rotation Estimation for Omni-directional Cameras Using Sinusoid Fitting

    • Qingwen Xu
    • Xiaoling Long
    • Sören Schwertfeger

    Short paper 09 August 2021 Article: 10

    

12. Multibody-Dynamic Modeling and Stability Analysis for a Bird-scale Flapping-wing Aerial Vehicle

    • Yaolei Shen
    • Wenjie Ge
    • Pu Miao

    Short Paper 06 August 2021 Article: 9

13. The State of Lifelong Learning in Service Robots:

    • S. Hamidreza Kasaei
    • Jorik Melsen
    • Klemen Voncina

    Survey Paper Open access 04 August 2021 Article: 8

14. Behavioral Decision-Making of Mobile Robot in Unknown Environment with the Cognitive Transfer

    • Dongshu Wang
    • Kai Yang
    • Lei Liu

    Regular Paper 04 August 2021 Article: 7

15. Robust Adaptive Control for A Novel Fully-Actuated Octocopter UAV with Wind Disturbance

    • Panfeng Shu
    • Feng Li
    • Masahiro Oya

    Regular Paper 04 August 2021 Article: 6

16. AL-TUNE: A Family of Methods to Effectively Tune UAV Controllers in In-flight Conditions

    • Dariusz Horla
    • Wojciech Giernacki
    • Martin Saska

    Short Paper Open access 03 August 2021 Article: 5

17. Machine Learning and Data Visualization to Evaluate a Robotics and Programming Project Targeted for Women

    • Danielli A. Lima
    • Maria Eugênia A. Ferreira
    • Aline Fernanda F. Silva

    Regular Paper 03 August 2021 Article: 4

18. Reporting and Investigation of Unmanned Aircraft Systems (UAS) Accidents and Serious Incidents. Regulatory Perspective

    • Piotr Jan Kasprzyk
    • Anna Konert

    Regular Paper Open access 03 August 2021 Article: 3

19. Towards Automated 3D Search Planning for Emergency Response Missions

    • Savvas Papaioannou
    • Panayiotis Kolios
    • Marios M. Polycarpou

    Regular Paper 03 August 2021 Article: 2

20. Spatio-temporal Data Association for Object-augmented Mapping

    • Felipe D. B. de Oliveira
    • Marcondes R. da Silva Jr.
    • Aluizio F. R. Araújo

    Regular Paper 03 August 2021 Article: 1