Respiratory Training and Guiding System using Head Mount Display Device to improve the regularity of breathing

In this paper we discuss a model to estimate the power consumption and lifetime (LT) of an OLED display based on its pixel value and the brightness setting of the screen (scbr). This model is used to illustrate the effect of OLED aging on display color characteristics. Model parameters are based on power consumption measurement of a given display for a number of pixel and scbr combinations. OLED LT is often given for the most stressful display operating situation, i.e. white image at maximum scbr, but having the ability to predict the LT for other configurations can be meaningful to estimate the impact and quality of new image processing algorithms. After explaining our model we present a use case to illustrate how we use it to evaluate the impact of an image processing algorithm for brightness adaptation.

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Eddy Current Effects on the Guiding System of High-Speed Maglev Train

2019 22nd International Conference on Electrical Machines and Systems (ICEMS) ◽

10.1109/icems.2019.8922563 ◽

2019 ◽

Author(s):

Yongpan Hu ◽

Jiewei Zeng ◽

Zhiqiang Long ◽

Mingda Zhai

Keyword(s):

Eddy Current ◽

High Speed ◽

Maglev Train ◽

Guiding System

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Cross-Modal Effect of Presenting Visual and Force Feedback That Create the Illusion of Stair-Climbing

Applied Sciences ◽

10.3390/app11072987 ◽

2021 ◽

Vol 11 (7) ◽

pp. 2987

Author(s):

Takumi Okumura ◽

Yuichi Kurita

Keyword(s):

Visual Information ◽

Force Feedback ◽

Activity Level ◽

Experimental Results ◽

Stair Climbing ◽

Mirror Therapy ◽

Visual Condition ◽

Stroke Patients ◽

Head Mount Display ◽

The Brain

Image therapy, which creates illusions with a mirror and a head mount display, assists movement relearning in stroke patients. Mirror therapy presents the movement of the unaffected limb in a mirror, creating the illusion of movement of the affected limb. As the visual information of images cannot create a fully immersive experience, we propose a cross-modal strategy that supplements the image with sensual information. By interacting with the stimuli received from multiple sensory organs, the brain complements missing senses, and the patient experiences a different sense of motion. Our system generates the sense of stair-climbing in a subject walking on a level floor. The force sensation is presented by a pneumatic gel muscle (PGM). Based on motion analysis in a human lower-limb model and the characteristics of the force exerted by the PGM, we set the appropriate air pressure of the PGM. The effectiveness of the proposed system was evaluated by surface electromyography and a questionnaire. The experimental results showed that by synchronizing the force sensation with visual information, we could match the motor and perceived sensations at the muscle-activity level, enhancing the sense of stair-climbing. The experimental results showed that the visual condition significantly improved the illusion intensity during stair-climbing.

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Multiclass emotion prediction using heart rate and virtual reality stimuli

Journal Of Big Data ◽

10.1186/s40537-020-00401-x ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Aaron Frederick Bulagang ◽

James Mountstephens ◽

Jason Teo

Keyword(s):

Heart Rate ◽

Virtual Reality ◽

Nearest Neighbor ◽

Subject Classification ◽

Support Vector ◽

Display Device ◽

K Nearest Neighbor ◽

Potential Applications ◽

Health Rehabilitation ◽

Emotion Model

Abstract Background Emotion prediction is a method that recognizes the human emotion derived from the subject’s psychological data. The problem in question is the limited use of heart rate (HR) as the prediction feature through the use of common classifiers such as Support Vector Machine (SVM), K-Nearest Neighbor (KNN) and Random Forest (RF) in emotion prediction. This paper aims to investigate whether HR signals can be utilized to classify four-class emotions using the emotion model from Russell’s in a virtual reality (VR) environment using machine learning. Method An experiment was conducted using the Empatica E4 wristband to acquire the participant’s HR, a VR headset as the display device for participants to view the 360° emotional videos, and the Empatica E4 real-time application was used during the experiment to extract and process the participant's recorded heart rate. Findings For intra-subject classification, all three classifiers SVM, KNN, and RF achieved 100% as the highest accuracy while inter-subject classification achieved 46.7% for SVM, 42.9% for KNN and 43.3% for RF. Conclusion The results demonstrate the potential of SVM, KNN and RF classifiers to classify HR as a feature to be used in emotion prediction in four distinct emotion classes in a virtual reality environment. The potential applications include interactive gaming, affective entertainment, and VR health rehabilitation.

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A Dual-Wavelength Electrochromic Film Based on Pt(II) Complex for Optical Modulation at Telecommunication Wavelength and Dark Solid-State Display Device

Journal of Materials Chemistry C ◽

10.1039/d1tc01425k ◽

2021 ◽

Author(s):

Qiaozhen Pi ◽

Dongqin Bi ◽

dongfang qiu ◽

Hongwei Wang ◽

Xinfeng Cheng ◽

...

Keyword(s):

Solid State ◽

Dual Wavelength ◽

Optical Modulation ◽

Display Device ◽

Redox Behaviour ◽

Diffusion Controlled ◽

Telecommunication Wavelength

A cyclometalated platinum phenylacetylide [(L)Pt(C≡C-ph)] {L = 4-[p-(diphenylamino)phenyl]-6-phenyl-2,2’-bipyridine} has been successfully synthesized and characterized. And its oxidative electropolymerization film with a non-diffusion controlled redox behaviour and an inverse dependence of...

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Investigation of X and Y Configuration Modal and Dynamic Response to Velocity Excitation of the Nanometer Resolution Linear Servo Motor Stage with Quasi-Industrial Guiding System in Quasi-Stable State

Mathematics ◽

10.3390/math9090951 ◽

2021 ◽

Vol 9 (9) ◽

pp. 951

Author(s):

Artur Piščalov ◽

Edgaras Urbonas ◽

Darius Vainorius ◽

Jonas Matijošius ◽

Artūras Kilikevičius

Keyword(s):

Dynamic Response ◽

System Analysis ◽

Operating Time ◽

Stable State ◽

Degree Of Freedom ◽

Diagnostic Tools ◽

Nanometer Scale ◽

Positioning Systems ◽

Industrial Enterprises ◽

Guiding System

Research institutions and industrial enterprises demand high accuracy and precision positioning systems to fulfil cutting edge requirements of up-to-date technological processes in the field of metrology and optical fabrication. Linear motor system design with high performance mechanical guiding system and optical encoder ensures nanometer scale precision and constant static error, which can be calibrated by optical instruments. Mechanical guiding systems has its benefits in case of control theory and its stability; unfortunately, on the other hand, there exists high influence of structure geometry and tribological effects such as friction and modal response. The aforementioned effect cannot be straightforwardly identified during the assembly process. Degradation of dynamic units can be detected only after certain operating time. Single degree of freedom systems are well investigated and the effect of degradation can be predicted, but there exists a gap in the analysis of nanometer scale multi degree of freedom dynamic systems; therefore, novel diagnostic tools need to be proposed. In this particular paper, dual axes dynamic system analysis will be presented. The main idea is to decouple standard stacked XY stage and analyse X and Y configuration as two different configurations of the same object, while imitators of corresponding axes are absolutely solid and stationary. As storage and analysis of time domain data is not efficient, main attention will be concentrated on frequency domain data, while, of course, statistical and graphical representation of dynamic response will be presented. Transfer function, dynamic response, spectral analysis of dynamic response, and modal analysis will be presented and discussed. Based on the collected data and its analysis, comparison of X and Y responses to different velocity excitation will be presented. Finally, conclusions and recommendations of novel diagnostic way will be presented.

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Waves in a guiding system with azimuthally magnetized ferrite

Radiophysics and Quantum Electronics ◽

10.1007/bf01034627 ◽

1978 ◽

Vol 21 (10) ◽

pp. 1051-1055

Author(s):

V. P. Prudkin ◽

Yu. M. Terent'ev

Keyword(s):

Guiding System

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Multibody Dynamic Model of Web Guiding System With Moving Web

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.4001797 ◽

2010 ◽

Vol 132 (5) ◽

Cited By ~ 3

Author(s):

Lei Yu ◽

Zhihua Zhao ◽

Gexue Ren

Keyword(s):

Dynamic Model ◽

Lateral Displacement ◽

Dynamical Behavior ◽

Contact Forces ◽

Lagrangian Formulation ◽

Pi Control ◽

Control Law ◽

Reference Surface ◽

Multibody Dynamic ◽

Guiding System

In this paper, a multibody dynamic model is established to simulate the dynamics and control of moving web with its guiding system, where the term moving web is used to describe thin materials, which are manufactured and processed in a continuous, flexible strip form. In contrast with available researches based on Eulerian description and beam assumption, webs are described by Lagrangian formulation with the absolute nodal coordinate formulation (ANCF) plate element, which is based on Kirchhoff’s assumptions that material normals to the original reference surface remain straight and normal to the deformed reference surface, and the nonlinear elasticity theory that accounts for large displacement, large rotation, and large deformation. The rollers and guiding mechanism are modeled as rigid bodies. The distributed frictional contact forces between rollers and web are considered by Hertz contact model and are evaluated by Gauss quadrature. The proportional integral (PI) control law for web guiding is also embedded in the multibody model. A series of simulations on a typical web-guide system is carried out using the multibody dynamics approach for web guiding system presented in this study. System dynamical information, for example, lateral displacement, stress distribution, and driving moment for web guiding, are obtained from simulations. Parameter sensitivity analysis illustrates the effect of influence variables and effectiveness of the PI control law for lateral movement control of web that are verified under different gains. The present Lagrangian formulation of web element, i.e., ANCF element, is not only capable of describing the large movement and deformation but also easily adapted to capture the distributed contact forces between web and rollers. The dynamical behavior of the moving web can be accurately described by a small number of ANCF thin plate elements. Simulations carried out in this paper show that the present approach is an effective method to assess the design of web guiding system with easily available desktop computers.

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