# Special Issue on Human-Computer Interactions 2.0
## 2 The Topics of the Special Issue \"Human Computer Interactions 2.0\"
This method can also reduce the cost of obtaining the optimized turning parameters corresponding with the predicted machining error. [PERSON] et al. present the paper \"Application of Virtual Reality Method in Aircraft Maintenance Service--Taking Dornier 228 as an Exam\" [9]. In this study, an aircraft maintenance virtual reality (AMVR) system was developed. For a Dornier-228 aircraft, a walk-around visual inspection of its fuel system was designed and tested in a virtual environment. For the system, CATIA V5 and Unity 3D software were used for designing the 3D model of the aircraft and developing the visual environment, respectively. With the software, the visual environment of the aircraft hangar was created for the system. The developed system was tested by students to validate the effectiveness of using the AMVR system in training. The students acknowledged that the system was beneficial to their learning, which proved that the developed system is highly effective for training students to improve aircraft maintenance skills. [PERSON] et al. present \"Hardware Development and Safety Control Strategy Design for a Mobile Rehabilitation Robot\" [10]. This study presents a prototype and a safety controller for a mobile rehabilitation robot (MRR). The prototype integrates an autonomous mobile bodyweight support system (AMBSS) with a lower-limb exoskeleton system (LES) to simultaneously achieve natural over-ground gait training and motion relearning. Human-centered rehabilitation robots must guarantee the safety of patients in the presence of significant tracking errors. It is difficult for traditional stiff controllers to ensure safety and excellent tracking accuracy concurrently because they cannot explicitly guarantee smooth, safe, and overdamped motions without overshoot. This paper integrated a linear extended state observer (LESO) into proxy-based sliding mode control (ILESO-PSMC) to overcome this problem. The LESO was used to observe the system's unknown states and total disturbance simultaneously, ensuring that the \"proxy\" tracks the reference target accurately and avoids the unsafe control of the MRR. Based on the Lyapunov theorem to prove the closed-loop system stability, the proposed safety control strategy has three advantages: (1) it provides an accurate and safe control without worsening tracking performance during regular operation, (2) it guarantees safe recoveries and overdamped properties after abnormal events, and (3) it does not need to identify the system model and measure unknown system states as well as external disturbance, which is quite difficult for human-robot interaction (HRI) systems. The results demonstrate the feasibility of the proposed ILESO-PSMC for MRR. The experimental comparison also indicates a better safety performance for the ILESO-PSMC than for the conventional proportional-integral-derivative (PID) control. [PERSON] et al. present \"Visual Management and Gamification: An Innovation for Disseminating Information about Production to Construction Professionals\" [11]. The purpose of this paper was to evaluate a gamified model for disseminating production information in the construction industry using visual management. This is a qualitative exploratory study that employed the Design Science methodology and the Design Science Research method. The model was designed, developed, and evaluated by 35 people, including 10 off-site users who focused on usability, user experience, and model promotability, 15 engineers, and 10 workers who considered user experience and promotability. Employees and managers thought the model was excellent, while outside users thought it was good. Furthermore, the evaluators made suggestions for improvements. The authors conclude that the proposed model improves production information dissemination in construction by considering the target audience's digital inclusion and knowledge diffusion within work teams. All authors contributed equally to this paper. All authors have read and agreed to the published version of the manuscript. Not applicable.