scholarly journals Solenoid actuated Five-fingered robotic hand design: evaluating the capability of solenoid actuators in generating basic finger motions

2019 ◽  
Vol 15 (3) ◽  
pp. 1273
Author(s):  
Syed Zainal Abidin Syed Kamarul Bahrin ◽  
Khairul Salleh Mohamed Sahari
Keyword(s):  
Reaction Time ◽  
Emerging Technologies ◽  
Robotic Hand ◽  
Fast Reaction ◽  
Stroke Length ◽  
Fast Reaction Time ◽  
Similar Appearance ◽  
Operational Concept ◽  
Fast Motions ◽  
Human Hands

<span lang="EN-GB">There are numerous robotic hand designs but the five-fingered robotic hand design is the most dexterous robotic hand design due to its similar appearance and motions with the human hands. The fingers' motions are commonly driven by geared motors or other types of emerging technologies. However, the motions are yet to be driven directly by solenoid actuators due to its limited stroke length and also general perceptions of its applications as an actuator. Nevertheless, solenoid actuators are known for their fast reaction time and strong holding force which are useful to generate fast motions and strong grasping actions. To realise this concept, previous research and developments had been done by the authors but the outcome was not convincing enough due to the absence of a working prototype. Therefore, this paper introduced a new solenoid actuated robotic hand design and its prototype. The prototype was then tested and evaluated in accordance to the operational concept where the findings showed that the solenoid actuators were capable of generating basic finger motions</span><span>.</span>

scholarly journals Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

2014 ◽  
Vol 16 (37) ◽  
pp. 20127-20137 ◽  
Author(s):  
F. A. La Porta ◽  
J. Andrés ◽  
M. S. Li ◽  
J. R. Sambrano ◽  
J. A. Varela ◽  
...  
Keyword(s):  
Optical Properties ◽  
Reaction Time ◽  
Cost Effective ◽  
Phase Control ◽  
Degree Of Crystallinity ◽  
Zns Nanoparticles ◽  
Fast Reaction ◽  
Tetrabutylammonium Hydroxide ◽  
Fast Reaction Time ◽  
Zinc Blende

We demonstrated phase control, mediated by the presence of tetrabutylammonium hydroxide, in the growth of ZnS crystals by using a cost effective MAS method; a very moderate temperature (140 °C) and a very fast reaction time are sufficient to produce nanostructures with a good degree of crystallinity.

Correlation between temporal response of fMRI and fast reaction time in a language task

2004 ◽  
Vol 22 (4) ◽  
pp. 451-455 ◽  
Author(s):  
Ho-Ling Liu ◽  
Wan-Ting Liao ◽  
Shin-Yi Fang ◽  
Tieh-Chi Chu ◽  
Li Hai Tan
Keyword(s):  
Reaction Time ◽  
Temporal Response ◽  
Fast Reaction ◽  
Fast Reaction Time

scholarly journals Initial Development of a Master-Slave Controller for a Five-Fingered Robotic Hand Design by Using Pressure Sensors Comparator Technique

2018 ◽  
Vol 7 (4.35) ◽  
pp. 765
Author(s):  
Syed Zainal Abidin Syed Kamarul Bahrin ◽  
Khairul Salleh Mohamed Sahari
Keyword(s):  
Pressure Sensors ◽  
Robotic Hand ◽  
Robotic Hands ◽  
Initial Finding ◽  
Initial Development ◽  
Future Developments ◽  
Physiological Diversity ◽  
Advanced Technologies ◽  
Novel Approach ◽  
Similar Appearance

There are numerous robotic hand designs but the five-fingered robotic hand design is the most dexterous robotic hand design due to its similar appearance and motions with the human hands. The five-fingered robotic hands are commonly controlled or governed through a master-slave system that can be accomplished by using simple preset motions or other complicated and advanced technologies. However, a five-fingered robotics hand can also be controlled by a novel approach known as pressure sensors comparator technique. This technique compares the values from the pressure sensors that are strategically located at the glove (master) and robotic hand (slave). If the values differ, the actuators will generate motions accordingly. The initial finding based on the master and slave prototypes showed that applying this technique is very challenging due to the humans' physiological diversity. Nevertheless, a solution was proposed for further studies and future developments by introducing an offset.

scholarly journals Assessing Cognitive Performance in Badminton Players: A Reproducibility and Validity Study

2017 ◽  
Vol 55 (1) ◽  
pp. 149-159 ◽  
Author(s):  
Tanja van de Water ◽  
Barbara Huijgen ◽  
Irene Faber ◽  
Marije Elferink-Gemser
Keyword(s):  
Reaction Time ◽  
Inhibitory Control ◽  
Concurrent Validity ◽  
Sports Performance ◽  
Fast Reaction ◽  
General Reaction ◽  
Specific Reaction ◽  
National Ranking ◽  
Elite Sports ◽  
Reaction Inhibition

AbstractFast reaction and good inhibitory control are associated with elite sports performance. To evaluate the reproducibility and validity of a newly developed Badminton Reaction Inhibition Test (BRIT), fifteen elite (25 ± 4 years) and nine non-elite (24 ± 4 years) Dutch male badminton players participated in the study. The BRIT measured four components: domain-general reaction time, badminton-specific reaction time, domain-general inhibitory control and badminton-specific inhibitory control. Five participants were retested within three weeks on the badminton-specific components. Reproducibility was acceptable for badminton-specific reaction time (ICC = 0.626, CV = 6%) and for badminton-specific inhibitory control (ICC = 0.317, CV = 13%). Good construct validity was shown for badminton-specific reaction time discriminating between elite and non-elite players (F = 6.650, p < 0.05). Elite players did not outscore non-elite players on domain-general reaction time nor on both components of inhibitory control (p > 0.05). Concurrent validity for domain-general reaction time was good, as it was associated with a national ranking for elite (p = 0.70, p < 0.01) and non-elite (p = 0.70, p < 0.05) players. No relationship was found between the national ranking and badminton-specific reaction time, nor both components of inhibitory control (p > 0.05). In conclusion, reproducibility and validity of inhibitory control assessment was not confirmed, however, the BRIT appears a reproducible and valid measure of reaction time in badminton players. Reaction time measured with the BRIT may provide input for training programs aiming to improve badminton players’ performance.

Transforming Human Hand Motion for Telemanipulation

1992 ◽  
Vol 1 (1) ◽  
pp. 63-79 ◽  
Author(s):  
Thomas H. Speeter
Keyword(s):  
Force Feedback ◽  
Robotic Manipulation ◽  
Human Hand ◽  
Robotic Hand ◽  
Robotic Hands ◽  
Automated Control ◽  
Functional Transformation ◽  
Hand Motion ◽  
Computationally Expensive ◽  
Human Hands

Manipulation by teleoperation (telemanipulation) offers an apparently straightforward and less computationally expensive route toward dextrous robotic manipulation than automated control of multifingered robotic hands. The functional transformation of human hand motions into equivalent robotic hand motions, however, presents both conceptual and analytical problems. This paper reviews and proposes algorithmic methods for transforming the actions of human hands into equivalent actions of slave multifingered robotic hands. Forward positional transformation is considered only, the design of master devices, feedforward dynamics, and force feedback are not considered although their importance for successful telemanipulation is understood. Linear, nonlinear, and functional mappings are discussed along with performance and computational considerations.

Kinematic Analysis of a Dexterous Hand

2012 ◽  
Vol 433-440 ◽  
pp. 754-762
Author(s):  
Bibhuti Bhusan Biswal ◽  
P.K. Parida ◽  
K.C. Pati
Keyword(s):  
Kinematic Analysis ◽  
Robotic Hand ◽  
Robotic Hands ◽  
Irregular Shapes ◽  
Soft Objects ◽  
Dexterous Hand ◽  
Human Hands

Handling of objects with irregular shapes and that of flexible/soft objects by ordinary robot grippers is difficult. Multi fingered gripper may be a solution to such handling tasks. However, dexterous grippers will be the appropriate solution to such problems. Although it is possible to develop robotic hands which can be very closely mapped to human hands, it is sometimes not to be done due to control, manufacturing and economic reasons. The present work aims at designing and developing a dexterous robotic hand for manipulation of objects.

scholarly journals Potensi Formulasi Sediaan Sabun Padat Minyak Kelapa dengan Pengisi Kaolin sebagai Media Pembersih Najis Mughallazah

2020 ◽  
Vol 9 (2) ◽  
pp. 70-74
Author(s):  
Vera Diana Panjaitan ◽  
Lilis Sukeksi ◽  
Iriany ◽  
Siswarni
Keyword(s):  
Reaction Time ◽  
Water Content ◽  
Reaction Temperature ◽  
Pcr Analysis ◽  
Analysis Method ◽  
Conventional Pcr ◽  
Dna Electrophoresis ◽  
Quality Requirements ◽  
Human Hands

Qur'an explains najis mughallazah be purified using water as much as 7 times and one of which uses the ground. The addition of clay to the soap helps remove impure DNA attached to the surface of the skin. This study was conducted to determine the effect of an increase in the amount of kaolin and reaction temperature on water content and hardness of soap; determine whether the soap formulas meet the quality requirements of SNI and determine whether the soap formula capable of eliminating the derivatives pig DNA using PCR analysis method. The reaction was designed in 4 reaction temperatures (50ºC - 80ºC), the consistency of kaolin (10% - 20%), 35% NaOH concentration, reaction time 10 minutes and the stirring speed of 250 rpm. The results showed that all variations meet SNI standards. The best results were obtained in 15%; 50ºC and 17.5%; 60ºC. First, rinse the soap can eliminate DNA smeared unclean human hands. DNA washing using water and soap shows the remaining conventional PCR DNA electrophoresis. Kaolin solid soap formulation produced may eliminate DNA and meet the standard SNI 06-3532-2016.

scholarly journals THE STUDY OF THE AGE-RELATED DYNAMICS OF THE REACTION TIME TO VISUAL STIMULI IN SCHOOLCHILDREN

2018 ◽  
pp. 337
Author(s):  
Milutin Parlić ◽  
Aleksandra Ilić ◽  
Vladimir Jakšić ◽  
Milan Parlić ◽  
Vedrana Makević ◽  
...  
Keyword(s):  
Physical Activity ◽  
Reaction Time ◽  
Simple Reaction Time ◽  
Visual Stimuli ◽  
Moderate Physical Activity ◽  
Older Children ◽  
Fast Reaction ◽  
Basketball Players ◽  
Simple Reaction ◽  
Age Related

A fast reaction to visual stimuli is important for the success of any athlete. A fast reaction time enables a quick response in key situations. We have studied how age, sport engagement, moderate physical activity and lateralization affect the simple reaction time to visual stimuli in schoolchildren between the ages of 9 and 13. The reaction time to visual stimuli was statistically significantly shorter in older children compared to younger ones. The sport club basketball players who had been training and playing basketball for several years had a statistically significantly shorter reaction time to visual stimuli compared to schoolchildren of the same age from a rural environment who did not engage in sports. Moderate physical activity and lateralization did not significantly affect the reaction time values. The simple reaction time to visual stimuli was used in this study to evaluate the speed and explosive abilities of young basketball players. By training certain movements, we managed to improve their reaction time and thus influence the quality of their game. Integrating training of these skills into sport clubs and schools would affect the improvement of basketball performance and the prevention of injury.

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