scholarly journals Application of a Validated Innovative Smart Wearable for Performance Analysis by Experienced and Non-Experienced Athletes in Boxing

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7882
Author(s):  
Tobias Menzel ◽  
Wolfgang Potthast
Keyword(s):  
Performance Analysis ◽  
Field Method ◽  
Punch Force ◽  
Punch Velocity ◽  
Intergroup Comparison ◽  
Objective Feedback ◽  
Important Means ◽  
State Of Research ◽  
Expert Novice ◽  
Smart Wearable

An athlete’s sporting performance depends to a large extent on the technical execution of the athletic motion in order to achieve maximum effectiveness in physical performance. Performance analysis provides an important means of classifying and quantifying athletic prowess in terms of the significant performance aspects of the sport to provide objective feedback. This study aimed to analyze technical execution in terms of punch trajectory, force, velocity and time, considering the expert-novice paradigm by investigating the technical execution of 31 experienced and non-experienced athletes for the four main punching techniques of the cross, jab, uppercut and hook strike. The kinetic and kinematic data were collected by means of a boxing monitoring system developed and validated for in-field use. The research revealed significant correlation for executed punching trajectory and punch force in intragroup comparison and significant differences in intergroup comparison. No significant differences were detected for punch velocity in either inter- or intra-group paradigms. This study, through use of the sensor system, aligns with the results of existing publications conducted in laboratory conditions, in the assessment of punch force, punch speed and punch time and thus extends the state of research by use of a smart wearable in field method.

Performance Analysis of GAN Architecture for Effective Facial Expression Synthesis

2021 ◽  
pp. 290-316
Author(s):  
Karthik R. ◽  
Nandana B. ◽  
Mayuri Patil ◽  
Chandreyee Basu ◽  
Vijayarajan R.
Keyword(s):  
Deep Learning ◽  
Performance Analysis ◽  
Facial Expressions ◽  
Data Distribution ◽  
Loss Functions ◽  
Human Beings ◽  
Learning Networks ◽  
Open Mouth ◽  
Important Means

Facial expressions are an important means of communication among human beings, as they convey different meanings in a variety of contexts. All human facial expressions, whether voluntary or involuntary, are formed as a result of movement of different facial muscles. Despite their variety and complexity, certain expressions are universally recognized as representing specific emotions - for instance, raised eyebrows in combination with an open mouth are associated with surprise, whereas a smiling face is generally interpreted as happy. Deep learning-based implementations of expression synthesis have demonstrated their ability to preserve essential features of input images, which is desirable. However, one limitation of using deep learning networks is that their dependence on data distribution and the quality of images used for training purposes. The variation in performance can be studied by changing the optimizer and loss functions, and their effectiveness is analysed based on the quality of output images obtained.

THE EFFECT OF PUNCH GEOMETRY ON PUNCHING PROCESS IN TITANIUM SHEET

2020 ◽  
Vol 82 (2) ◽  
Author(s):  
Yani Kurniawan ◽  
Muslim Mahardika ◽  
Suyitno Suyitno
Keyword(s):  
Surface Quality ◽  
Work Hardening ◽  
Pure Titanium ◽  
Shear Angle ◽  
Commercially Pure Titanium ◽  
Punch Force ◽  
Double Shear ◽  
Punch Velocity ◽  
Punching Process ◽  
Punch Geometry

Reducing punch force, increasing the sheared surface, and improving the work hardening have been real challenges in developing a punching process, and the right selection of punch geometry can resolve these challenges. Selecting the appropriate geometry, however, has been difficult to do since the effect of punch geometry on the punching process is rarely studied, and therefore, this study aims to investigate the effect of punch force, sheared surface, and work hardening by using commercially pure titanium sheets. The punching process under the study employed three different punch geometries, namely flat (FLAT), single shear angle (SSA) and double shear angle (DSA) with a shear angle of 17°, while the Punch velocity used was 35mm/s and 70 mm/s. The results show that the punching process using SSA and DSA punch geometry with the punch velocity of 35 mm/s reduces the punch force by 18% and 13% consecutively compared to that of FLAT with the same velocity. However, the sheared surface quality seems to decline as the rollover height increases by about 48% and 32%. Moreover, the burnish height decreases by 34% and 7% and the resulted work hardening improves by 4.7% and 2.3% respectively. The study concludes that SSA and DSA punch geometry can be best used to reduce punch force and increase work hardening, but apparently fail in increasing the sheared surface quality.

scholarly journals Smart Wearables for Tennis Game Performance Analysis

2020 ◽  
Author(s):  
Marko Kos ◽  
Iztok Kramberger
Keyword(s):  
Performance Analysis ◽  
Skin Temperature ◽  
Arm Movements ◽  
Wearable Device ◽  
Sports Activity ◽  
Essential Information ◽  
Recorded Data ◽  
Biometric Information ◽  
Game Performance ◽  
Smart Wearable

For monitoring the progress of athletes in various sports and disciplines, several different approaches are nowadays available. Recently, miniature wearables have gained popularity for this task due to being lightweight and typically cheaper than other approaches. They can be positioned on the athlete’s body, or in some cases, the devices are incorporated into sports requisites, like tennis racquet handles, balls, baseball bats, gloves, etc. Their purpose is to monitor the performance of an athlete by gathering essential information during match or training. In this chapter, the focus will be on the different possibilities of tennis game monitoring analysis. A miniature wearable device, which is worn on a player’s wrist during the activity, is going to be presented and described. The smart wearable device monitors athletes’ arm movements with sampling the output of the 6 DOF IMU. Parallel to that, it also gathers biometric information like pulse rate and skin temperature. All the collected information is stored locally on the device during the sports activity. Later, it can be downloaded to a PC and transferred to a cloud-based service, where visualization of the recorded data and more detailed game/training statistics can be performed.

scholarly journals Mapping trending topics and leading producers in innovation policy research

2021 ◽  
Vol 26 (3) ◽  
Author(s):  
Pedro López-Rubio ◽  
Alicia Mas-Tur ◽  
Norat Roig-Tierno ◽  
◽  
Keyword(s):  
Performance Analysis ◽  
Innovation Policy ◽  
Policy Research ◽  
Field Method ◽  
Research Field ◽  
Policy Studies ◽  
Science Mapping ◽  
Research Themes ◽  
Wide Range ◽  
Policy Work

Introduction. We investigate the most relevant innovation policy research themes, as well as the authors and journals that produce the most research in this field. Method. We used bibliometrics combining two main procedures: performance analysis and science mapping. Analysis. The 2,929 documents under analysis were gathered from the Web of Science Core Collection database considering all years up to and including 2019. Results. A wide range of bibliometric indicators were used to identify the most cited innovation policy studies, and the most productive and influential authors and journals. Also, bibliometric maps of keyword co-occurrence, authors co-citation and countries co-authorship were depicted to visualize relevant relationships. Conclusions. This study shows that the combination of bibliometric performance analysis and science mapping offers a tool for evaluators to complement qualitative analyses of a research field. We identified four main findings. First, the main innovation policy research themes are based on three pillars: innovation systems and business, science and knowledge, and governance and sustainability transitions. Second, the leading authors in innovation policy work at institutions in Europe. Third, authors working at institutions in countries with a common or similar language, culture or innovation policy tend to collaborate. Fourth, the top journals in innovation policy reveal an increasing influence of sustainable development and transitions within this field.

Evaluation of the dark field method for large association of spread DNA

1978 ◽  
Vol 36 (2) ◽  
pp. 190-191
Author(s):  
Douglas C. Barker
Keyword(s):  
Electron Microscopy ◽  
Molecular Weight ◽  
Mitochondrial Dna ◽  
Extraction Method ◽  
Field Method ◽  
Dark Field ◽  
Kinetoplast Dna ◽  
Field Electron ◽  
Field Electron Microscopy ◽  
Dark Field Electron

A number of satisfactory methods are available for the electron microscopy of nicleic acids. These methods concentrated on fragments of nuclear, viral and mitochondrial DNA less than 50 megadaltons, on denaturation and heteroduplex mapping (Davies et al 1971) or on the interaction between proteins and DNA (Brack and Delain 1975). Less attention has been paid to the experimental criteria necessary for spreading and visualisation by dark field electron microscopy of large intact issociations of DNA. This communication will report on those criteria in relation to the ultrastructure of the (approx. 1 x 10-14g) DNA component of the kinetoplast from Trypanosomes. An extraction method has been developed to eliminate native endonucleases and nuclear contamination and to isolate the kinetoplast DNA (KDNA) as a compact network of high molecular weight. In collaboration with Dr. Ch. Brack (Basel [nstitute of Immunology), we studied the conditions necessary to prepare this KDNA Tor dark field electron microscopy using the microdrop spreading technique.

A Many-Beam Technique for Enhanced Resolution of Partial Dislocations

1972 ◽  
Vol 30 ◽  
pp. 646-647
Author(s):  
J. M. Oblak ◽  
B. H. Kear
Keyword(s):  
Phase Shift ◽  
Field Method ◽  
Dark Field ◽  
Bright Field ◽  
Field Technique ◽  
Weak Beam ◽  
Partial Dislocations ◽  
Enhanced Resolution ◽  
Nickel Base ◽  
Beam Technique

The “weak-beam” and systematic many-beam techniques are the currently available methods for resolution of closely spaced dislocations or other inhomogeneities imaged through strain contrast. The former is a dark field technique and image intensities are usually very weak. The latter is a bright field technique, but generally use of a high voltage instrument is required. In what follows a bright field method for obtaining enhanced resolution of partial dislocations at 100 KV accelerating potential will be described.A brief discussion of an application will first be given. A study of intermediate temperature creep processes in commercial nickel-base alloys strengthened by the Ll2 Ni3 Al γ precipitate has suggested that partial dislocations such as those labelled 1 and 2 in Fig. 1(a) are in reality composed of two closely spaced a/6 <112> Shockley partials. Stacking fault contrast, when present, tends to obscure resolution of the partials; thus, conditions for resolution must be chosen such that the phase shift at the fault is 0 or a multiple of 2π.

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