scholarly journals The Fit Matters: Influence of Accelerometer Fitting and Training Drill Demands on Load Measures in Rugby League Players

2018 ◽  
Vol 13 (8) ◽  
pp. 1083-1089 ◽  
Author(s):  
Blake D. McLean ◽  
Cloe Cummins ◽  
Greta Conlan ◽  
Grant Duthie ◽  
Aaron J. Coutts
Keyword(s):  
Team Sport ◽  
Rugby League ◽  
Two Dimensional ◽  
Vertical Load ◽  
3 Dimensional ◽  
Sport Activities ◽  
Load Unit ◽  
Load Vector ◽  
The Relationship ◽  
And Training

Purpose: To determine the relationship between drill type and accelerometer-derived loads during various team-sport activities and examine the influence of unit fitting on these loads. Methods: Sixteen rugby league players were fitted with microtechnology devices in either manufacturer vests or playing jerseys before completing standardized running, agility, and tackling drills. Two-dimensional (2D) and 3-dimensional (3D) accelerometer loads (BodyLoad™) per kilometer were compared across drills and fittings (ie, vest and jersey). Results: When fitted in a vest, 2D BodyLoad was higher during tackling (21.5 [14.8] AU/km) than during running (9.5 [2.5] AU/km) and agility (10.3 [2.7] AU/km). Jersey fitting resulted in more than 2-fold higher BodyLoad during running (2D = 9.5 [2.7] vs 29.3 [14.8] AU/km, 3D = 48.5 [14.8] vs 111.5 [45.4] AU/km) and agility (2D = 10.3 [2.7] vs 21.0 [8.1] AU/km, 3D = 40.4 [13.6] vs 77.7 [26.8] AU/km) compared with a vest fitting. Jersey fitting also produced higher BodyLoad during tackling drills (2D = 21.5 [14.8] vs 27.8 [18.6] AU/km, 3D = 42.0 [21.4] vs 63.2 [33.1] AU/km). Conclusions: This study provides evidence supporting the construct validity of 2D BodyLoad for assessing collision/tackling load in rugby league training drills. Conversely, the large values obtained from 3D BodyLoad (which includes the vertical load vector) appear to mask small increases in load during tackling drills, rendering 3D BodyLoad insensitive to changes in contact load. Unit fitting has a large influence on accumulated accelerometer loads during all drills, which is likely related to greater incidental unit movement when units are fitted in jerseys. Therefore, it is recommended that athletes wear microtechnology units in manufacturer-provided vests to provide valid and reliable information.

scholarly journals Building Rubiks Cube: A Function Of Production

2008 ◽  
Vol 12 (1) ◽  
pp. 25-32
Author(s):  
Jose Villacis Gonzalez
Keyword(s):  
The Other ◽  
Two Dimensional ◽  
3 Dimensional ◽  
Production Processes ◽  
Key Factor ◽  
Final Design ◽  
Dimensional Cube ◽  
The One ◽  
The Cost ◽  
The Relationship

The Rubiks cube is a special game and a very particular puzzle. The 3-dimensional cube is made up of six faces, or boundary sections, of the same size. Each face, or section, consists of several two dimensional square parts, or cubelets. Every cubelet has the same surface area, and each of the six faces has the same number of cubelets. Therefore, the cubes surface is entirely covered with isocubelets. The cubelets are painted in six different colours, and it is possible to create a design where each face shows only one colour. Such is the object of the game: to turn the cubelets and sections of the cube so that only one (different) colour shows on each one of the six faces. If one manages to master the puzzle, the cube will show six faces of the same size, each coloured differently. The cubelets and sections of the cube can be turned both horizontally and vertically in order to change colours while trying to determine the appropriate combination to complete the puzzle. This approach is linked to a particular function in microeconomics that deals with the relationship between two magnitudes: on the one hand, the moves needed to achieve the desired final design; and on the other hand, the cost linked to the required production processes. This analytical model must use combinatorial mathematics equipment because, after all, the key factor in solving the Rubiks cube is the way in which the cubelets and sections are arranged.

Effects of a 2-Week High-Intensity Training Camp on Sleep Activity of Professional Rugby League Athletes

2017 ◽  
Vol 12 (7) ◽  
pp. 928-933 ◽  
Author(s):  
Heidi R. Thornton ◽  
Grant M. Duthie ◽  
Nathan W. Pitchford ◽  
Jace A. Delaney ◽  
Dean T. Benton ◽  
...  
Keyword(s):  
Sleep Onset ◽  
Sleep Time ◽  
Rugby League ◽  
Training Camp ◽  
High Intensity Training ◽  
Time In Bed ◽  
Nighttime Sleep ◽  
Relationship Of ◽  
The Relationship ◽  
And Training

Purpose:To investigate the effects of a training camp on the sleep characteristics of professional rugby league players compared with a home period.Methods:During a 7-d home and 13-d camp period, time in bed (TIB), total sleep time (TST), sleep efficiency (SE), and wake after sleep onset were measured using wristwatch actigraphy. Subjective wellness and training loads (TL) were also collected. Differences in sleep and TL between the 2 periods and the effect of daytime naps on nighttime sleep were examined using linear mixed models. Pearson correlations assessed the relationship of changes in TL on individuals’ TST.Results:During the training camp, TST (–85 min), TIB (–53 min), and SE (–8%) were reduced compared with home. Those who undertook daytime naps showed increased TIB (+33 min), TST (+30 min), and SE (+0.9%). Increases in daily total distance and training duration above individual baseline means during the training camp shared moderate (r = –.31) and trivial (r = –.04) negative relationships with TST.Conclusions:Sleep quality and quantity may be compromised during training camps; however, daytime naps may be beneficial for athletes due to their known benefits, without being detrimental to nighttime sleep.

scholarly journals On symmetry reduction and some classes of invariant solutions of the (1+3)-dimensional homogeneous Monge-Ampère equation

2021 ◽  
Vol 14 (3) ◽  
pp. 206-218
Author(s):  
Vasyl Fedorchuk ◽  
Volodymyr Fedorchuk
Keyword(s):  
Lie Algebra ◽  
Structural Properties ◽  
Symmetry Reduction ◽  
Two Dimensional ◽  
Invariant Solutions ◽  
Smooth Functions ◽  
3 Dimensional ◽  
Reduced Equations ◽  
Monge Ampere ◽  
The Relationship

We study the relationship between structural properties of the two-dimensional nonconjugate subalgebras of the same rank of the Lie algebra of the Poincaré group P(1,4) and the properties of reduced equations for the (1+3)-dimensional homogeneous Monge-Ampère equation. In this paper, we present some of the results obtained concerning symmetry reduction of the equation under investigation to identities. Some classes of the invariant solutions (with arbitrary smooth functions) are presented.

scholarly journals SARS-CoV-2 transmission during team-sport: Do players develop COVID-19 after participating in rugby league matches with SARS-CoV-2 positive players?

2020 ◽  
Author(s):  
Ben Jones ◽  
Gemma Phillips ◽  
Simon PT Kemp ◽  
Brendan Payne ◽  
Brian Hart ◽  
...  
Keyword(s):  
Team Sport ◽  
Rugby League ◽  
Rt Pcr ◽  
Video Footage ◽  
Proximity Analysis ◽  
Close Proximity ◽  
Sport Activities ◽  
Community Transmission ◽  
Close Contacts

ABSTRACTObjectivesEvaluate the interactions between SARS-CoV-2 positive players and other players during rugby league matches, to determine the risk of in-game SARS-CoV-2 transmission.DesignObservational.SettingSuper League rugby league during four matches in which SARS-CoV-2 positive players were retrospectively found to have participated (2nd August and 4th October 2020).Participants136 male elite rugby league players: eight SARS-CoV-2 positive participants, 28 identified close contacts and 100 other players who participated in any of the four matches.Main Outcome measuresClose contacts were defined by analysis of video footage for player interactions and microtechnology (GPS) data for proximity analysis. Close contacts and other players involved in the matches becoming positive for SARS-CoV-2 by RT-PCR within 14 days of the match were reported.ResultsThe eight SARS-CoV-2 positive players were involved in up to 14 tackles with other individual players. SARS-CoV-2 positive players were within a 2 m proximity of other players for up to 316 secs, from 60 interactions. One identified contact returned a positive SARS-CoV-2 result within 14 days of the match (subsequently linked to an outbreak within their club environment, rather than in-match transmission), whereas the other 27 identified contacts returned negative SARS-CoV-2 follow up tests and no one developed COVID-19 symptoms. Ninety-five players returned negative and five players returned positive SARS-CoV-2 RT-PCR routine tests within 14 days of the match. Sources of transmission in the five cases were linked to internal club COVID-19 outbreaks and wider-community transmission.ConclusionDespite a high number of tackle involvements and close proximity interactions between SARS-CoV-2 positive players and players on the same and opposition teams during a rugby league match, these data suggest that in-game SARS-CoV-2 transmission is limited during these types of team sport activities played outdoors.

THE RELATIONSHIP BETWEEN MANAGEMENT SUPPORT, TRAINING MOTIVATION, INTENTION TO TRANSFER, AFFECTIVE REACTION, UTILITY REACTION, SUPERVISOR SUPPORT, AND LEVEL III AND IV LEADERSHIP TRAINING TRANSFER: A CASE IN INDONESIAN MINISTRY OF FINANCE

INFO ARTHA ◽  
2017 ◽  
Vol 2 ◽  
pp. 1-19
Author(s):  
Roby Syaiful Ubed
Keyword(s):  
Training Transfer ◽  
Hierarchical Regression ◽  
Management Support ◽  
Supervisory Support ◽  
Affective Reaction ◽  
Transfer Training ◽  
Training Motivation ◽  
Ministry Of Finance ◽  
The Relationship ◽  
And Training

The purpose of this research is to examine how training transfer is influenced by management support, training motivation, intention to transfer, affective reaction, utility reaction, supervisory support. To achieve this purpose, this study used the employees in Indonesian Ministry of Finance. A sample of 258 employees from level III and level IV leaders completed questionnaires that include measurements such as training motivation, supervisor supports, affective reaction, utility reaction, intention to transfer, training transfer, perceived training transfer, training retention, managerial transfer support, motivation to learn, training self-efficacy, and demographic characteristics. Hypothesis testing was done by using three steps of hierarchical regression analysis. The results of this study indicate that there are significantly positive relationships between the aforementioned independent variables and training transfer. Implications of this study were discussed. 

scholarly journals Template-Free Self-Assembly of Two-Dimensional Polymers into Nano/Microstructured Materials

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3310
Author(s):  
Shengda Liu ◽  
Jiayun Xu ◽  
Xiumei Li ◽  
Tengfei Yan ◽  
Shuangjiang Yu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Recent Progress ◽  
Two Dimensional ◽  
Subsequent Removal ◽  
The Past ◽  
2D Polymers ◽  
Template Free ◽  
Self Assembled ◽  
The Relationship ◽  
Polymer Tubes

In the past few decades, enormous efforts have been made to synthesize covalent polymer nano/microstructured materials with specific morphologies, due to the relationship between their structures and functions. Up to now, the formation of most of these structures often requires either templates or preorganization in order to construct a specific structure before, and then the subsequent removal of previous templates to form a desired structure, on account of the lack of “self-error-correcting” properties of reversible interactions in polymers. The above processes are time-consuming and tedious. A template-free, self-assembled strategy as a “bottom-up” route to fabricate well-defined nano/microstructures remains a challenge. Herein, we introduce the recent progress in template-free, self-assembled nano/microstructures formed by covalent two-dimensional (2D) polymers, such as polymer capsules, polymer films, polymer tubes and polymer rings.

EQUIVALENCE OF TWO-DIMENSIONAL GRAVITIES

1990 ◽  
Vol 05 (16) ◽  
pp. 1251-1258 ◽  
Author(s):  
NOUREDDINE MOHAMMEDI
Keyword(s):  
Gauge Theory ◽  
Explicit Solution ◽  
Light Cone ◽  
Equations Of Motion ◽  
Two Dimensional ◽  
Induced Gravity ◽  
Light Cone Gauge ◽  
Dimensional Gravity ◽  
The Relationship ◽  
Chern Simons

We find the relationship between the Jackiw-Teitelboim model of two-dimensional gravity and the SL (2, R) induced gravity. These are shown to be related to a two-dimensional gauge theory obtained by dimensionally reducing the Chern-Simons action of the 2+1 dimensional gravity. We present an explicit solution to the equations of motion of the auxiliary field of the Jackiw-Teitelboim model in the light-cone gauge. A renormalization of the cosmological constant is also given.

“Beholding the Man”: Viewing (or is it Marking?) John’s Trial Scene alongside Kitsch Art

2016 ◽  
Vol 24 (2) ◽  
pp. 245-264
Author(s):  
Andrew P. Wilson
Keyword(s):  
Two Dimensional ◽  
Devotional Art ◽  
The People ◽  
Subject And Object ◽  
Ecce Homo ◽  
Small Stories ◽  
John's Gospel ◽  
Relationship Of ◽  
The Relationship ◽  
Point Of Departure

One of the grand scenes of the Passion narratives can be found in John’s Gospel where Pilate, presenting Jesus to the people, proclaims “Behold the man”: “Ecce Homo.” But what exactly does Pilate mean when he asks the reader to “Behold”? This paper takes as its point of departure a roughly drawn picture of Jesus in the “Ecce Homo” tradition and explores the relationship of this picture to its referent in John’s Gospel, via its capacity as kitsch devotional art. Contemporary scholarship on kitsch focuses on what kitsch does, or how it functions, rather than assessing what it is. From this perspective, when “beholding” is understood not for what it reveals but for what it does, John’s scene takes on a very different significance. It becomes a scene that breaks down traditional divisions between big and small stories, subject and object as well as text and context. A kitsch perspective opens up possibilities for locating John’s narrative in unexpected places and experiences. Rather than being a two-dimensional departure from the grandeur of John’s trial scene, kitsch “art” actually provides a lens through which the themes and dynamics of the narrative can be re-viewed with an expansiveness somewhat lacking from more traditional commentary.


Numerical Analysis of Bridge Expansion-Induced Rail Deformation of Ballast Truck

2014 ◽  
Vol 580-583 ◽  
pp. 3208-3214 ◽  
Author(s):  
Zhen Wei Xiong ◽  
Xin Ling Liang ◽  
Xian Xing Dai ◽  
Ping Wang
Keyword(s):  
Granular Flow ◽  
Element Model ◽  
Discrete Element Model ◽  
Board Structure ◽  
Vertical Deformation ◽  
Two Dimensional ◽  
Running Safety ◽  
Bridge Plate ◽  
Ballast Track ◽  
The Relationship

when the ballast track stretch with the bridge, ballast which is near expansion joint will move confusedly. As a result, rail produced vertical deformation. The deformation will affect the running safety and comfortability of train. At present, there are two kinds of treatments which are cover board structure and baffle structure to deal ballast’s movement. Aiming at the different modes of stretching when the two kinds of structures and different arrangement condition of bridge plate are applied, the rail-sleeper-ballast discrete element model is developed by the method of two-dimensional granular flow. The relationship between rail deformation and bridge expansion is analyzed on the foundation of the model. Results show as flows: when bridge extends or shortens, rail always produced upwarp deformation. Bridge plate should arrange asymmetrically. Like this, the rail deformation decrease by 40%. And adopting the baffle structure can effectively reduce the influence of bridge expansion in ballast truck.

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