Hand Eye Research Articles

Hubungan Power Otot Lengan dan Koordinasi Mata Tangan terhadap Hasil Pukulan Groundstroke Backhand Tenis Lapangan pada Mahasiswa Pendidikan Jasmani Universitas Tanjungpura

This study aims to determine the relationship between arm muscle power and hand eye coordination on backhand groundstrokes in Physical Education students at Tanjungpura University. This research uses quantitative methods with a correlational approach. Based on statistical analysis, it was found that there is a correlation between arm muscle power and backhand groundstrokes, this can be seen from the results of the product moment correlation test rx_1y which was obtained, namely 0.683, a significant relationship can be seen from the obtained value of r calculated = 0.683 > r table = 0.632, and There is also a significant relationship between eye-hand coordination and backhand groundstrokes, this can be seen from the results of the product moment correlation test rx_2y which was obtained at 0.744, therefore there is a very significant relationship as seen from the obtained value of r calculated = 0.744 > r table = 0.632 . After the results x_1Y and x_2Y are obtained, they are tested again using the multiple correlation test, which is useful for getting how big the correlation is. The results of the research show that arm muscle power and eye-hand coordination have coefficient values for backhand groundstrokes, this can be seen from the results of the multiple correlation test obtained which is 0.81. If the calculation results are seen from the r value interpretation table, then a value of 0.81 indicates a high correlation category. Keywords: Hand Eye Coordination, Arm Muscle Power, Backhand Groundstroke

Analysis of Eye Coordination, Arm Power and VO2max in Archery Athletes in Terms of Gender

Archery is a sport that prioritizes endurance, strength, accuracy, coordination, flexibility and balance to form archery techniques. These factors must all be supported by training, excellent and long-lasting physical condition. Therefore, every archery athlete must have excellent physical condition when facing a competition or championship. In performance sports, a person or athlete needs good physical condition in addition to technical ability. The physical training provided must be in accordance with the characteristics of the number being developed and in accordance with the physical condition of the swimming athlete himself. Strength is an important basic element in supporting movement skills. Strength is required in all sports for all activities that depend on strength. The strength that works more in archery is muscle strength. Muscle strength refers to a muscle group that is capable of carrying out long contractions. Arm muscle strength is the ability of a muscle or group of muscles to contract dynamically or statically by pulling a weight for a relatively long time, to provide encouragement to create consistency of movement from the beginning to the end of archery. Therefore, the strength of the arm muscles and the physical condition of the archer are very important to achieve optimal results. Through this research, researchers are interested in conducting research with the title analysis of hand eye coordination, arm power and vo2max of archery athletes in terms of gender. After the results of the physical condition analysis are obtained, the researchers hope that archery coaches and athletes can further optimize competition preparation and achieve the best performance. The method in this research program is quantitative descriptive. With physical condition test instruments for archery athletes. This study aims to determine the results of the analysis of hand eye coordination, arm power and vo2max of archery athletes in terms of gender. The population in this study was the KONI archery athletes from Bantul Regency, totaling 24 athletes. Based on the research results, it can be concluded that arm length, eye-hand coordination and VO2max of KONI archery athletes in Bantul Regency are in the medium category.

Effect of Immersive Virtual Reality Environment on Reaction Time, Agility and Coordination among Collegiate Students

Background: Virtual reality is the sum of the hardware and software systems that seek to perfect an all-inclusive, sensory illusion of being present in another environment which is applied to a broad range of sports such as skiing, goalkeeping rugby union, baseball and basketball, pistol shooting and cycling speed. Reaction time is the elapsed time between stimulus onset and an individual’s response on elementary cognitive tasks. Coordination is the capability to perform a sequence of movements rhythmically smoothly and accurately. Agility refers to the capacity to quickly change the location of the entire body in space with quickness and accuracyObjectives: The main objective of this study was to see the effect of virtual reality table tennis on coordination, reaction time and agility among collegiate students.Material and Methods: Based on inclusion and exclusion criteria, 60 collegiate students of age group 18-24 years were taken. The subjects were divided into two groups as group A and group B of 30 each. Group A played table tennis game in real environment and group B played table tennis in virtual environment. Pre and post score were taken for coordination, reaction time and agility using hand eye coordination test, plate tapping test and Davies test respectively. The data was collected, compiled and analyzed.Result:Descriptive statistics, paired & unpaired ‘t’ test were used for the intra-group and intergroup comparison.Significant improvements were seen in post scores of coordination, reaction time and agility in both groups at 0.05 level in both real and virtual table tennis groups. However, when both groups were compared, non-significant differences were observed in all the variables.Conclusion:The study concluded that virtual reality table tennis is as effective as real table tennis in improving reaction time, coordination and agility among collegiate students.

Training using a commercial immersive virtual reality system on hand–eye coordination and reaction time in students: a randomized controlled trial

The implementation of VR games opens up a wide range of opportunities for the development of dexterity, speed and precision of movements among various professional groups. The aim of this study was to investigate the effects of a commercial immersive VR music game on hand–eye coordination and reaction time speed in students. This study enrolled 32 individuals, randomly assigned to the experimental or control group. The intervention consisted of a 15-min training session of the immersive music game “Beat Saber”, once a day for 5 consecutive days. The primary outcomes included reaction time measurements: the plate tapping test and the ruler-drop test (Ditrich's test), trial making test (TMT) A and TMT B to assess coordination and visual attention, likewise VR sickness assessment by Virtual Reality Sickness Questionnaire (VRSQ). The secondary outcome included an energy expenditure assessment (SenseWear Armband). The data analysis revealed a statistically significant improvement in hand–eye coordination in the experimental group, with no improvement in the control group. The results were similar in measurements of reaction time. Analysis of the VRSQ questionnaire results showed a statistically significant reduction in oculomotor domain symptoms and total score during successive training days. The immersive VR music game has the potential to improve reaction time and hand–eye coordination in students.Graphical abstract

A comparative study to assess diagnostic efficacy of micro typing gel technique versus conventional tube technique in blood cross-match in blood bank at a tertiary care hospital

Abstract: BACKGROUND: In transfusion medicine, cross-matching and compatibility are determined using the conventional tube approach. The goal of the current study is to compare the microtyping gel approach to the conventional tube method for studying blood cross-match. OBJECTIVES: The objective of the study was to assess the compatibility of donor’s blood with recipient blood by microtyping gel technique and conventional tube technique and comparison of advantages and disadvantages of the two techniques. MATERIALS AND METHODS: This observational, cross-sectional study investigation was carried out in a tertiary care facility’s blood bank for 1½ years. It was decided to compare the effectiveness of the traditional tube and gel techniques. RESULTS: In the current investigation, we evaluated the age of the study participants and found that the majority of the study participants were male (63.17%) and most of them were between the ages of 21 and 40 years. The men-to-women ratio in this study was 1.71:1. About 2300 blood samples were subjected to compatibility testing using both the traditional test tube technology and the microtyping gel technology. The conventional method and the gel card approach are equivalent in terms of sensitivity and specificity. However, the gel card approach is simple to use, quick, reliable, and allows for the recording of data. The spin saline tube approach, in comparison, takes longer and produces unreliable results. This makes the gel card approach preferable to the conventional method. The findings were examined. CONCLUSIONS: Although the conventional tube technology is still regarded as the gold standard for pretransfusion analysis, it nevertheless has several drawbacks and relies on the precise hand–eye coordination of the laboratory staff. We advise using the microtyping gel approach due to its ease of use, stability of outcomes, dispensing of controls and absence of washing process, and equivalent specificity and sensitivity.

Defocus Force-Guided Precision Autofocus of Hand–Eye Robot System

Defocus Force-Guided Precision Autofocus of Hand–Eye Robot System

Point Cloud Registration-Enabled Globally Optimal Hand–Eye Calibration

Point Cloud Registration-Enabled Globally Optimal Hand–Eye Calibration

A study on eye hand coordination of all India inter university women ball badminton players

A study on eye hand coordination of all India inter university women ball badminton players

Hubungan koordinasi mata tangan dan kekuatan otot lengan terhadap ketepatan shooting disiplin 1 (station 1) pada atlet petanque

Every competition that is held requires good shooting qualifications. The aim of this research is to determine the relationship between hand eye coordination and shooting accuracy, to determine the relationship between arm muscle strength and shooting accuracy, to determine the relationship between hand eye coordination and arm muscle strength to shooting accuracy in Discipline 1 (station 1).) in petanque athletes. The research approach used by researchers is a quantitative research approach, with a non-experimental quantitative research type with a correlational research design. The results of the analysis of the hypothesis test data with a total number of respondents as many as 11 petanque athletes, the results obtained are Fcount (10.91) > Ftable (4.46), thus it can be stated that between the variables hand eye coordination (X1) and arm muscle strength ( X2) has a positive and significant correlation with the shooting accuracy variable (Y). Based on the results of the data analysis above, there is a relationship between hand eye coordination and arm muscle strength on shooting accuracy.

Demonstrating mathematics learning as the emergence of eye–hand dynamic equilibrium

Demonstrating mathematics learning as the emergence of eye–hand dynamic equilibrium

Construction and Optimization of a Collaborative Harvesting System for Multiple Robotic Arms and an End-Picker in a Trellised Pear Orchard Environment

In order to meet the needs of intensive mechanized picking in trellised pear orchards, this paper designed a pick-place integrated end-picker based on the analysis of agronomic characteristics of trellised pear gardens and fruit. In order to realize the accurate positioning of pears in picking, based on the kinematic analysis of robot arms and the construction of a private dataset, the YOLOv5s object detection algorithm was used in conjunction with a depth camera to achieve fruit positioning. The hand–eye system calibration was carried out. Aiming at solving the problems of redundancy, inefficiency, and uneven distribution of task volume in the conventional multiple robot arms algorithm, a simulated annealing algorithm was introduced to optimize the picking sequence, and a task allocation method was proposed. On the basis of studying several key parameters affecting the performance of the algorithm, the picking efficiency was greatly optimized. And the effectiveness of the proposed multi-robot collaborative picking method in a trellised pear orchard environment was demonstrated through experiments and simulation verification. The experiments showed that the picking efficiency of the integrated end-picker was increased by about 30%, and the success rate was significantly higher than that of the flexible grippers. The results of this study can be utilized to advance robotic pear-picking research and development.

Examining the Relationship Between the Dominant Eye and the Dominant Hand

Background and Objectives: This study aims to determine the relationship between hand dominance and ocular dominance (OD) using different test formats of handedness and ocular dominance. Methods: Three OD test formats were administered to 74 healthy young adult subjects, hole-in-card test for sighting dominance, near-point-of-convergence (NPC) test for motor dominance, and +1.50 to blur test for sensory dominance. All of these tests were performed while the best correction was in front of the subject’s eyes. An interview for preferred dominance and a finger-tapping test for performance dominance were administered to determine the dominant hand. Results: Right eye dominance was indicated in 66.2% with the hole-in-card test, 56.8% with the NPC test, and 51.4% of cases with the +1.50-to-blur test. Statistically, a significant nonrandom relationship was observed between the results of hole-in-card and NPC tests (P=0.000), hole-in-card and +1.50-to-blur tests (P=0.003), and also between the results of NPC and +1.50-to-blur tests (P=0.003). In addition, it was found that in 52.7% of the cases, all three dimensions of eye dominance (sighting, sensory, and motor) are not in the same eye and do not have pure eye dominance. In examining the dominant hand, the majority of subjects were right-handed both in the preference (62 of 74 [83.8%]) and in the performance dimension (63 of 74 [85.1%]). Statistical analysis shows a significant nonrandom relationship between the pure dominant hand and the pure dominant eye (P=0.000). In addition, the pure dominant hand (0.813) and pure dominant eye (P=0.126) are independent of gender. Conclusion: Determining the OD, similar to determining the hand dominance based on their different dimensions, can have different results. According to the results, in all dimensions of ocular and hand dominance, both the dominant eye and the dominant hand are more on the right side of people. Furthermore, the pure dominant eye and pure dominant hand are not independent of each other.

The DNA repair enzyme, aprataxin, plays a role in innate immune signaling.

Ataxia with oculomotor apraxia type 1 (AOA1) is a progressive neurodegenerative disorder characterized by a gradual loss of coordination of hand movements, speech, and eye movements. AOA1 is caused by an inactivation mutation in the APTX gene. APTX resolves abortive DNA ligation intermediates. APTX deficiency may lead to the accumulation of 5'-AMP termini, especially in the mitochondrial genome. The consequences of APTX deficiency includes impaired mitochondrial function, increased DNA single-strand breaks, elevated reactive oxygen species production, and altered mitochondrial morphology. All of these processes can cause misplacement of nuclear and mitochondrial DNA, which can activate innate immune sensors to elicit an inflammatory response. This study explores the impact of APTX knockout in microglial cells, the immune cells of the brain. RNA-seq analysis revealed significant differences in the transcriptomes of wild-type and APTX knockout cells, especially in response to viral infections and innate immune pathways. Specifically, genes and proteins involved in the cGAS-STING and RIG-I/MAVS pathways were downregulated in APTX knockout cells, which suggests an impaired immune response to cytosolic DNA and RNA. The clinical relevance of these findings was supported by analyzing publicly available RNA-seq data from AOA1 patient cell lines. Comparisons between APTX-deficient patient cells and healthy control cells also revealed altered immune responses and dysregulated DNA- and RNA-sensing pathways in the patient cells. Overall, this study highlights the critical role of APTX in regulating innate immunity, particularly in DNA- and RNA-sensing pathways. Our findings contribute to a better understanding of the underlying molecular mechanisms of AOA1 pathology and highlights potential therapeutic targets for this disease.

Dual quaternion operations for rigid body motion and their application to the hand–eye calibration

Dual quaternion operations for rigid body motion and their application to the hand–eye calibration

Real-Time Robotic Presentation Skill Scoring Using Multi-Model Analysis and Fuzzy Delphi-Analytic Hierarchy Process.

Existing methods for scoring student presentations predominantly rely on computer-based implementations and do not incorporate a robotic multi-classification model. This limitation can result in potential misclassification issues as these approaches lack active feature learning capabilities due to fixed camera positions. Moreover, these scoring methods often solely focus on facial expressions and neglect other crucial factors, such as eye contact, hand gestures and body movements, thereby leading to potential biases or inaccuracies in scoring. To address these limitations, this study introduces Robotics-based Presentation Skill Scoring (RPSS), which employs a multi-model analysis. RPSS captures and analyses four key presentation parameters in real time, namely facial expressions, eye contact, hand gestures and body movements, and applies the fuzzy Delphi method for criteria selection and the analytic hierarchy process for weighting, thereby enabling decision makers or managers to assign varying weights to each criterion based on its relative importance. RPSS identifies five academic facial expressions and evaluates eye contact to achieve a comprehensive assessment and enhance its scoring accuracy. Specific sub-models are employed for each presentation parameter, namely EfficientNet for facial emotions, DeepEC for eye contact and an integrated Kalman and heuristic approach for hand and body movements. The scores are determined based on predefined rules. RPSS is implemented on a robot, and the results highlight its practical applicability. Each sub-model is rigorously evaluated offline and compared against benchmarks for selection. Real-world evaluations are also conducted by incorporating a novel active learning approach to improve performance by leveraging the robot's mobility. In a comparative evaluation with human tutors, RPSS achieves a remarkable average agreement of 99%, showcasing its effectiveness in assessing students' presentation skills.

A Precise Calibration Method for the Robot-Assisted Percutaneous Puncture System

The precision and stability of the Robot-Assisted Percutaneous Puncture (RAPP) system have become increasingly crucial with the widespread integration of robotic technology in the field of medicine. The accurate calibration of the RAPP system prior to surgery significantly influences target positioning performance. This study proposes a novel system calibration method that simultaneously addresses system hand–eye calibration and robot kinematic parameters calibration, thereby enhancing the surgery success rate and ensuring patient safety. Initially, a Closed-loop Hand–eye Calibration (CHC) method is employed to rapidly establish transformation relationships among system components. These CHC results are then integrated with nominal robot kinematic parameters to preliminarily determine the system calibration parameters. Subsequently, a hybrid algorithm, combining the regularized Levenberg–Marquardt (LM) algorithm and a particle filtering algorithm, is utilized to accurately estimate the system calibration parameters in stages. Numerical simulations and puncture experiments were conducted using the proposed system calibration method and other comparative methods. The experimental results revealed that, among several comparative methods, the approach presented in this paper yields the greatest improvement in the puncture accuracy of the RAPP system, demonstrating the accuracy and effectiveness of this method. In conclusion, this calibration method significantly contributes to enhancing the precision, operational capability, and safety of the RAPP system in practical applications.

Automatic Targetless Monocular Camera and LiDAR External Parameter Calibration Method for Mobile Robots

With the continuous development and popularization of sensor-fusion technology for mobile robots, the application of camera and light detection and ranging (LiDAR) fusion perception has become particularly important. Moreover, the calibration of extrinsic parameters between the camera and LiDAR is a crucial prerequisite for fusion. Although traditional target-based calibration methods have been widely adopted, their cumbersome operation and high costs necessitate the development of more efficient and flexible calibration methods. To address this problem, this study proposed a two-stage calibration method based on motion and edge matching. In the first stage, the preliminary estimation of the extrinsic parameters between the camera and LiDAR was performed by matching visual odometry and LiDAR odometry using a hand–eye target method. In the second stage, the calibration results from the first stage were further refined by matching the image edges and discontinuous depth point clouds. The calibration system was then tested in both simulated and actual environments. The experimental results showed that this method, which did not require specially structured targets, could achieve highly flexible and robust automated calibration. Compared to other advanced methods, the accuracy of the proposed method was higher.

Neuronal activity in posterior parietal cortex area LIP is not sufficient for saccadic eye movement production

It is widely recognized that the posterior parietal cortex (PPC) plays a role in active exploration with eye movements, arm reaching, and hand grasping. Whether this role is causal in nature is largely unresolved. One region of the PPC appears dedicated to the control of saccadic eye movement—lateral intraparietal (LIP) area. This area LIP possesses direct projections to well-established oculomotor centers and contains neurons with movement-related activity. In this study, we tested whether these neurons are implicated in saccade initiation and production. The movement-related activity of LIP neurons was tested by recording these neurons while monkeys performed a countermanding task. We found that LIP neuronal activity is not different before the execution or the cancelation of commanded saccades and thereby is not sufficient for the initiation and production of saccades. Consistent with the evolutionarily late emergence of the PPC, this finding relegates the role of this PPC area to processes that can regulate but not trigger eye movements.

Robotic Manipulator‐Assisted Omnidirectional Augmented Reality for Endoluminal Intervention Telepresence

Robotic telemedicine can provide timely treatment to critical patients in geographically remote locations. However, owing to the lack of depth information, occlusion of instrument, and view direction limitations, visual feedback from the patient to the clinician is typically unintuitive, which affects surgical safety. Herein, an omnidirectional augmented reality (AR)‐assisted robotic telepresence for interventional medicine is developed. A monocular camera is used as an AR device with a manipulator, where virtual key anatomies and instruments are superimposed on video images using multiobject hand–eye calibration, iterative closest point, and images superposition algorithms. The view direction of the camera can be changed via the manipulator, which allows the key anatomies and instruments to be viewed from different directions. Structure‐from‐motion and multi‐view stereo algorithms are used to reconstruct the scene on the patient's side, thus providing a virtual reality (VR) interactive interface for the manipulator's safe teleoperation. Two different phantom experiments are conducted to validate the effectiveness of the proposed method. Finally, an ex vivo experiment involving a porcine lumen is performed, in which the operator can view the interventional flexible robot. The proposed method integrates omnidirectional AR and VR with robotic telepresence, which can provide intuitive visual feedback to clinicians.

Comparing proficiency of obstetrics and gynaecology trainees with general surgery trainees using simulated laparoscopic tasks in Health Education England, North-West: a prospective observational study

BackgroundTraining programmes for obstetrics and gynaecology (O&G) and general surgery (GS) vary significantly, but both require proficiency in laparoscopic skills. We sought to determine performance in each specialty.DesignProspective, observational study.SettingHealth...