scholarly journals Advanced Hand Gesture Prediction Robust to Electrode Shift with an Arbitrary Angle

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1113 ◽  
Author(s):  
Zhenjin Xu ◽  
Linyong Shen ◽  
Jinwu Qian ◽  
Zhen Zhang
Keyword(s):  
Hand Gesture ◽  
Arbitrary Angle ◽  
Promising Candidate ◽  
Practical Applications ◽  
Signal Collection ◽  
Trained Classifier ◽  
Shift Detection ◽  
Peak Location ◽  
Bioelectric Signals ◽  
Insight Into

Recent advances in myoelectric controlled techniques have made the surface electromyogram (sEMG)-based sensing armband a promising candidate for acquiring bioelectric signals in a simple and convenient way. However, inevitable electrode shift as a non-negligible defect commonly causes a trained classifier requiring continuous recalibrations. In this study, a novel hand gesture prediction is firstly proposed; it is robust to electrode shift with arbitrary angle. Unlike real-time recognition which outputs target gestures only after the termination of hand motions, our proposed advanced prediction can provide the same results, even before the completion of signal collection. Moreover, by combining interpolated peak location and preset synchronous gesture, the developed simplified rapid electrode shift detection and correction at random rather than previous fixed angles are realized. Experimental results demonstrate that it is possible to achieve both electrode shift detection with high precision and gesture prediction with high accuracy. This study provides a new insight into electrode shift robustness which brings gesture prediction a step closer to practical applications.

scholarly journals Electromyogram-based hand gesture recognition robust to various arm postures

2018 ◽  
Vol 14 (7) ◽  
pp. 155014771879075 ◽  
Author(s):  
Kiwon Rhee ◽  
Hyun-Chool Shin
Keyword(s):  
Gesture Recognition ◽  
Recognition Accuracy ◽  
Hand Gesture Recognition ◽  
Hand Gesture ◽  
Hand Gestures ◽  
Practical Applications ◽  
Electrode Positioning ◽  
Recognition Technique

In the recognition of electromyogram-based hand gestures, the recognition accuracy may be degraded during the actual stage of practical applications for various reasons such as electrode positioning bias and different subjects. Besides these, the change in electromyogram signals due to different arm postures even for identical hand gestures is also an important issue. We propose an electromyogram-based hand gesture recognition technique robust to diverse arm postures. The proposed method uses both the signals of the accelerometer and electromyogram simultaneously to recognize correct hand gestures even for various arm postures. For the recognition of hand gestures, the electromyogram signals are statistically modeled considering the arm postures. In the experiments, we compared the cases that took into account the arm postures with the cases that disregarded the arm postures for the recognition of hand gestures. In the cases in which varied arm postures were disregarded, the recognition accuracy for correct hand gestures was 54.1%, whereas the cases using the method proposed in this study showed an 85.7% average recognition accuracy for hand gestures, an improvement of more than 31.6%. In this study, accelerometer and electromyogram signals were used simultaneously, which compensated the effect of different arm postures on the electromyogram signals and therefore improved the recognition accuracy of hand gestures.

Market Opportunity Analysis in Thailand: Case of Individual Power Sources by Thermoelectric-Generator Technology for Portable Electronics

2019 ◽  
Vol 16 (03) ◽  
pp. 1950027
Author(s):  
Surapree Maolikul ◽  
Thira Chavarnakul ◽  
Somchai Kiatgamolchai
Keyword(s):  
Thermoelectric Generator ◽  
Electrical Power ◽  
Technology Commercialization ◽  
Market Opportunity ◽  
Business Research ◽  
Power Sources ◽  
Practical Applications ◽  
Portable Electronics ◽  
Decision Factors ◽  
Insight Into

Thermoelectrics, an energy-conversion technology, has been developed for its potential to support portable electronics with an innovative power source. Primarily focusing on the metropolitan market in Thailand, the study, thus, aimed at the market insight into portable electronics users’ characteristics and opinions of thermoelectric-generator (TEG) technology commercialization. The business research was conducted to analyze their behaviors for power-supply lacking problems, encountering heat or cold sources, purchasing decision for a TEG-based charger and key decision factors. For practical applications, an innovative TEG-based charger should be more flexible by harnessing various heat or cold sources from ambient situations to generate electrical power.

Improving Techniques in Statically Equivalent Serial Chain Modeling for Center of Mass Estimation

2014 ◽  
Author(s):  
Bingjue Li ◽  
Andrew P. Murray ◽  
David H. Myszka
Keyword(s):  
Center Of Mass ◽  
Original System ◽  
Rigid Bodies ◽  
Joint Angles ◽  
Practical Applications ◽  
Serial Chain ◽  
System Of Rigid Bodies ◽  
Final Development ◽  
Data Error ◽  
Insight Into

Any articulated system of rigid bodies defines a Statically Equivalent Serial Chain (SESC). The SESC is a virtual chain that terminates at the center of mass (CoM) of the original system of bodies. A SESC may be generated experimentally without knowing the mass, CoM, or length of each link in the system given that its joint angles and overall CoM may be measured. This paper presents three developments toward recognizing the SESC as a practical modeling technique. Two of the three developments improve utilizing the technique in practical applications where the arrangement of the joints impacts the derivation of the SESC. The final development provides insight into the number of poses needed to create a usable SESC in the presence of data collection errors. First, modifications to a matrix necessary in computing the SESC are proposed. Second, the problem of generating a SESC experimentally when the system of bodies includes a mass fixed in the ground frame are presented and a remedy is proposed for humanoid-like systems. Third, an investigation of the error of the experimental SESC versus the number of data readings collected in the presence of errors in joint readings and CoM data is conducted. By conducting the method on three different systems with various levels of data error, a general form of the function for estimating the error of the experimental SESC is proposed.

The Temporal and the Eternal

2005 ◽  
pp. 611-636
Keyword(s):  
Rational Decision ◽  
Practical Applications ◽  
The World ◽  
The Universe ◽  
Insight Into

This chapter, taken from Josiah Royce's Gifford Lectures of 1899, argues that any rational decision as between a pessimistic and an optimistic view of the world, any account of the relations between God and Man, any view of the sense in which the evils and imperfections of the Universe can be comprehended or justified, any account of our ethical consciousness in terms reconcilable with our Idealism must turn in part upon a distinction between the Temporal and the Eternal, and upon an insight into their unity in the midst of their contrast. The problem at issue is one of the most delicate and, at the same time, one of the simplest of the great issues of philosophy. The chapter deals with it at first in a purely theoretical fashion and then proceeds to its practical applications.

scholarly journals Process-Induced Nanostructures on Anatase Single Crystals via Pulsed-Pressure MOCVD

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1668 ◽  
Author(s):  
Rukmini Gorthy ◽  
Susan Krumdieck ◽  
Catherine Bishop
Keyword(s):  
Metalorganic Chemical Vapor Deposition ◽  
Crystal Size ◽  
Chemical Vapor ◽  
Competitive Growth ◽  
Promising Candidate ◽  
Columnar Crystal ◽  
Practical Applications ◽  
Global Pandemic ◽  
Crystal Diameter ◽  
Plate Width

The recent global pandemic of COVID-19 highlights the urgent need for practical applications of anti-microbial coatings on touch-surfaces. Nanostructured TiO2 is a promising candidate for the passive reduction of transmission when applied to handles, push-plates and switches in hospitals. Here we report control of the nanostructure dimension of the mille-feuille crystal plates in anatase columnar crystals as a function of the coating thickness. This nanoplate thickness is key to achieving the large aspect ratio of surface area to migration path length. TiO2 solid coatings were prepared by pulsed-pressure metalorganic chemical vapor deposition (pp-MOCVD) under the same deposition temperature and mass flux, with thickness ranging from 1.3–16 μm, by varying the number of precursor pulses. SEM and STEM were used to measure the mille-feuille plate width which is believed to be a key functional nano-dimension for photocatalytic activity. Competitive growth produces a larger columnar crystal diameter with thickness. The question is if the nano-dimension also increases with columnar crystal size. We report that the nano-dimension increases with the film thickness, ranging from 17–42 nm. The results of this study can be used to design a coating which has co-optimized thickness for durability and nano-dimension for enhanced photocatalytic properties.

Literature Review of Clergy Resilience and Recommendations for Future Research

2020 ◽  
pp. 009164712096813
Author(s):  
Andrea M. Sielaff ◽  
Kate Rae Davis ◽  
J. Derek McNeil
Keyword(s):  
Literature Review ◽  
Traumatic Stress ◽  
Well Being ◽  
Work Life ◽  
Future Research ◽  
Review Of The Literature ◽  
Practical Applications ◽  
Insight Into ◽  
Professional Ministry

Clergy often experience a call to help others; however, this passion is hard to sustain because of the chronic and traumatic stress that are components of the job. Because of the unique stressors that are part of professional ministry, clergy need targeted support that is systemic as well as individual to practice resilience. This review of the research provides insight into what factors most impact clergy well-being; as congregations, supervisors, and denominations learn more about these factors, they can more effectively create environments in which clergy can be resilient. This review of the literature also illuminates what clergy might do for themselves to create a sustainable work life that supports their growth and thriving in the midst of adversity in ministry. In addition to articulating the specific stressors clergy face, this review resources congregations, clergy, and supervisors with practical applications of resilience research.

scholarly journals The Representative Porcine Model for Human Cardiovascular Disease

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Yoriyasu Suzuki ◽  
Alan C. Yeung ◽  
Fumiaki Ikeno
Keyword(s):  
Animal Models ◽  
Porcine Model ◽  
Small Animal ◽  
Large Animal ◽  
Murine Models ◽  
Practical Applications ◽  
Large Animal Models ◽  
Small Animal Models ◽  
Insight Into

To improve human health, scientific discoveries must be translated into practical applications. Inherent in the development of these technologies is the role of preclinical testing using animal models. Although significant insight into the molecular and cellular basis has come from small animal models, significant differences exist with regard to cardiovascular characteristics between these models and humans. Therefore, large animal models are essential to develop the discoveries from murine models into clinical therapies and interventions. This paper will provide an overview of the more frequently used large animal models, especially porcine models for preclinical studies.

scholarly journals Designing multivalent probes for tunable superselective targeting

2015 ◽  
Vol 112 (18) ◽  
pp. 5579-5584 ◽  
Author(s):  
Galina V. Dubacheva ◽  
Tine Curk ◽  
Rachel Auzély-Velty ◽  
Daan Frenkel ◽  
Ralf P. Richter
Keyword(s):  
Binding Sites ◽  
Rational Design ◽  
Cell Surface Receptor ◽  
Molecular Characteristics ◽  
Surface Binding ◽  
Binding Properties ◽  
Practical Applications ◽  
Mechanistic Insight ◽  
Surface Receptor ◽  
Insight Into

Specific targeting is common in biology and is a key challenge in nanomedicine. It was recently demonstrated that multivalent probes can selectively target surfaces with a defined density of surface binding sites. Here we show, using a combination of experiments and simulations on multivalent polymers, that such “superselective” binding can be tuned through the design of the multivalent probe, to target a desired density of binding sites. We develop an analytical model that provides simple yet quantitative predictions to tune the polymer’s superselective binding properties by its molecular characteristics such as size, valency, and affinity. This work opens up a route toward the rational design of multivalent probes with defined superselective targeting properties for practical applications, and provides mechanistic insight into the regulation of multivalent interactions in biology. To illustrate this, we show how the superselective targeting of the extracellular matrix polysaccharide hyaluronan to its main cell surface receptor CD44 is controlled by the affinity of individual CD44–hyaluronan interactions.

scholarly journals An Analytical Insight into the Buckling Paradox for Circular Cylindrical Shells under Axial and Lateral Loading

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Rabee Shamass ◽  
Giulio Alfano ◽  
Federico Guarracino
Keyword(s):  
Analytical Investigation ◽  
Practical Applications ◽  
The Past ◽  
Numerical Studies ◽  
Plates And Shells ◽  
Circular Cylindrical Shells ◽  
Insight Into ◽  
Flow Theory Of Plasticity ◽  
Numerical Approaches ◽  
Number Of Authors

A large number of authors in the past have concluded that the flow theory of plasticity tends to overestimate significantly the buckling load for many problems of plates and shells in the plastic range, while the deformation theory generally provides much more accurate predictions and is consequently used in practical applications. Following previous numerical studies by the same authors focused on axially compressed cylinders, the present work presents an analytical investigation which comprises the broader and different case of nonproportional loading. The analytical results are discussed and compared with experimental and numerical findings and the reason for the apparent discrepancy on the basis of the so-called “buckling paradox” appears once again to lay in the overconstrained kinematics on the basis of the analytical and numerical approaches present in the literature.

scholarly journals Insight into metallic behavior in epitaxial half-metallic NiCo2O4 films

RSC Advances ◽  
2017 ◽  
Vol 7 (57) ◽  
pp. 36026-36033 ◽  
Author(s):  
Kaiqi Zhang ◽  
Congmian Zhen ◽  
Wengang Wei ◽  
Wenzhe Guo ◽  
Guide Tang ◽  
...  
Keyword(s):  
Transport Properties ◽  
Electronic Transport ◽  
Cation Distribution ◽  
Optoelectronic Materials ◽  
Metallic Behavior ◽  
Half Metallic ◽  
Practical Applications ◽  
Electronic Transport Properties ◽  
Insight Into

Understanding the cation distribution and electronic transport properties of half-metallic NiCo2O4 (NCO) films is crucial to advancing their practical applications in optoelectronic materials.

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