Optimal location of Hybrid Flow Controller considering modified steady-state model

This paper introduces a modified power flow model for Hybrid Flow Controller (HFC) as an energy flow controller. The existing power flow models for Hybrid Flow Controller are suitable only for conventional power flow analysis, and are not applicable for OPF and optimal location analysis of FACTS devices. In this paper, some modifications were applied to the existing models to promote the accuracy and improve their conformability on any power system and hence leading to a precise steady-state analysis. The modified model and the existing model are investigated using different IEEE test systems and the results are compared together. The optimization method is numerically solved using Matlab and General Algebraic Modelling System (GAMS) software environments. The solution procedure uses Mixed Integer Non-Linear Programming (MINLP) and Relaxed Mixed Integer Non-Linear Programming (RMINLP) to solve the optimal location and setting of HFC incorporated in OPF problem considering the total fuel cost, power losses, and the system loadability as objective functions for single objective optimization problem and improve the power system operation.Hybrid Flow Controller (HFC) FACTS Power flow model OPF Optimal location

Design and usability analysis of gesture-based control for common desktop tasks

We have designed and implemented a vision-based system capable of interacting with user's natural arm and finger gestures. Using depth-based vision has reduced the effect of ambient disturbances such as noise and lighting condition. Various arm and finger gestures are designed and a system capable of detection and classification of gestures is developed and implemented. Finally the gesture recognition routine is linked to a simplified desktop for usability and human factor studies. Several factors such as precision, efficiency, ease-of-use, pleasure, fatigue, naturalness, and overall satisfaction are investigated in detail. Through different simple and complex tasks, it is concluded that finger-based inputs are superior to arm-based ones in the long run. Furthermore, it is shown that arm gestures cause more fatigue and appear less natural than finger gestures. However, factors such as time, overall satisfaction, and easiness were not affected by selecting one over the other

Usability study of static/dynamic gestures and haptic input as interfaces to 3D games

In this paper, the quality of the interaction of users with a 3D game using different modalities is studied. Three different interaction methods with a 3D virtual environment are considered: a haptic 3D mouse, natural static gestures (postures), and natural dynamic (kinetics) gestures. Through a comprehensive user experiment we compared the pre-defined natural gestures to each other and also to a haptic interface which is designed for the same game. The experiments analyze precision (error), efficiency (time), ease-of-use, pleasantness, fatigue, naturalness, mobility, and overall satisfaction as evaluation criteria. We also used user-selected ranks of importance as weight values for evaluation criteria to measure the overall satisfaction. Finally, our user experiment presents a learning curve for each of the three input methods which along with the other findings can be a good source for further research in the field of natural multimodal Human-Computer Interaction