scholarly journals Asymmetries in Football: The Pass—Goal Paradox

Symmetry ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1052
Author(s):  
Daniel R. Antequera ◽  
David Garrido ◽  
Ignacio Echegoyen ◽  
Roberto López del Campo ◽  
Ricardo Resta Serra ◽  
...  
Keyword(s):  
Football Team ◽  
National League ◽  
Number Of Passes ◽  
Strong Asymmetry ◽  
Made In

We investigate the relation between the number of passes made by a football team and the number of goals. We analyze the 380 matches of a complete season of the Spanish national league “LaLiga" (2018/2019). We observe how the number of scored goals is positively correlated with the number of passes made by a team. In this way, teams on the top (bottom) of the ranking at the end of the season make more (less) passes than the rest of the teams. However, we observe a strong asymmetry when the analysis is made depending on the part of the match. Interestingly, fewer passes are made in the second half of a match, while, at the same time, more goals are scored. This paradox appears in the majority of teams, and it is independent of the number of passes made. These results confirm that goals in the first half of matches are more “costly” in terms of passes than those scored in second halves.

scholarly journals Effectiveness of goalball athletes throwing in the Chilean National League

2021 ◽  
Vol 19 (2) ◽  
pp. e46651
Author(s):  
Kevin Isaías Campos Campos ◽  
Luis Felipe Castelli Correia de Campos ◽  
Marcio Pereira Morato ◽  
Alessandro Tosim ◽  
Mónica Fernández Muñoz ◽  
...  
Keyword(s):  
Physical Condition ◽  
Digital Camera ◽  
The Other ◽  
Final Phase ◽  
Effectiveness Rate ◽  
Other Hand ◽  
National League ◽  
Paralympic Sport ◽  
Made In

Goalball is a collective Paralympic sport with oppositional characteristics but without invasion by the athletes that, despite requiring great physical condition in offensive and defensive actions, is also identified as a tactical sport, where the administration of technique in the various game situations determines success in competition. The objective of the study was to analyze the effectiveness of the attack of the Chilean National Goalball League, according to type of shot and trajectory. Four Goalball matches of the final phase of a national tournament were filmed. For this, a digital camera was used behind an arch located in height. The matches were analyzed following the diagrams proposed by Morato et al. (2016) and Morato (2012). The front throw (FRO) was used the most (88.9%) with an effectiveness rate of 6.2%. Longer trajectories were made in short diagonals (SD) and parallel (PA) (31.3% and 23.2%, respectively). The FRO throw was directed in SD (34.5%) and PA (22.4%), while on the other hand, the spinning throws (SP) were directed preferably in PA (30.4%) and SD (29.1%). The FRO throw was more effective in PA (10.6%), whereas the SP throw was more effective in the middle diagonal (MD) (12.5%). The lateral positions execute throws, preferably FRO, but in defense the central positions are protagonists. Throws are most effective when they are directed in PA and SD.

Terrorizing defences: Sport in the Liberian civil conflict

2012 ◽  
Vol 47 (3) ◽  
pp. 358-378 ◽  
Author(s):  
Gary Armstrong ◽  
James Rosbrook-Thompson
Keyword(s):  
Civil Conflict ◽  
Charles Taylor ◽  
World Cup ◽  
Team Games ◽  
Football Team ◽  
The World ◽  
National League ◽  
Fault Lines ◽  
The One ◽  
Rules Of The Game

The democratically elected President of Liberia was between 1997 and 2004 also the country’s ‘Chief Patron of Sport’. Enjoying tennis more than team games, the one-time President, Charles Taylor, realized that the electorate’s enthusiasm for the game of football meant that the game could be a useful vehicle with which to associate. As well as funding the salaries of the national ‘Lone Star’ football team, Taylor also sponsored a football team in the national league drawn from his personal militia known as the ‘Anti-Terrorist Unit’ (ATU). Prone to random murder by night, the same players, out of their recognizable uniform and in match kit, respected the rules of the game and the position of the referee. Others seeking the same sporting enjoyment were, when on the field of play in 2003, captured and forced to join the Presidential militia when rebel forces sought to overthrow Taylor. Players of another team – mainly children – were killed mid-match when a rocket-propelled grenade – origins contested – landed in their midst. The Liberian nation’s most famous citizen and one-time FIFA World Footballer of the Year, George Weah, twice fled the country in terror, once when threatened by the forces of the President, and again years later when an angry mob of irate football supporters blamed him for their national football team’s failure to qualify for the World Cup Finals. There was no shortage of incidents in Liberia in the aforementioned years that could be classed as ‘terrorist’ and indeed terrifying; sporting practice at times exemplified the alternatives available to conflict, yet at other times it accentuated the fault lines in what BBC political journalist Fergal Keane famously called Africa’s ‘basket case’.

scholarly journals Defining a historic football team: Using Network Science to analyze Guardiola’s F.C. Barcelona

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
J. M. Buldú ◽  
J. Busquets ◽  
I. Echegoyen ◽  
F. Seirul.lo
Keyword(s):  
Path Length ◽  
Network Science ◽  
Social Systems ◽  
Clustering Coefficient ◽  
Algebraic Connectivity ◽  
Football Team ◽  
National League ◽  
Network Properties ◽  
New Methodologies ◽  
Network Metrics

Abstract The application of Network Science to social systems has introduced new methodologies to analyze classical problems such as the emergence of epidemics, the arousal of cooperation between individuals or the propagation of information along social networks. More recently, the organization of football teams and their performance have been unveiled using metrics coming from Network Science, where a team is considered as a complex network whose nodes (i.e., players) interact with the aim of overcoming the opponent network. Here, we combine the use of different network metrics to extract the particular signature of the F.C. Barcelona coached by Guardiola, which has been considered one of the best teams along football history. We have first compared the network organization of Guardiola’s team with their opponents along one season of the Spanish national league, identifying those metrics with statistically significant differences and relating them with the Guardiola’s game. Next, we have focused on the temporal nature of football passing networks and calculated the evolution of all network properties along a match, instead of considering their average. In this way, we are able to identify those network metrics that enhance the probability of scoring/receiving a goal, showing that not all teams behave in the same way and how the organization Guardiola’s F.C. Barcelona is different from the rest, including its clustering coefficient, shortest-path length, largest eigenvalue of the adjacency matrix, algebraic connectivity and centrality distribution.

Proxy president may mean inefficient policy in Myanmar

2016 ◽  
Keyword(s):  
Ethnic Groups ◽  
National Government ◽  
Vice Presidents ◽  
Content Type ◽  
Presidential Politics ◽  
Political Interests ◽  
National League ◽  
The Military ◽  
Made In ◽  
Regulatory Reforms

Subject Myanmar presidential politics and the outlook for the transfer of power. Significance On March 10, nominations will be made in the Union parliament for Myanmar's next president and two vice presidents. Following this, the National League for Democracy (NLD) will assume the national government. Impacts The prospect of two presidential successions before 2020 may constrain regulatory reforms and worry investors. The NLD may put a Suu Kyi presidency ahead of ethnic peace, inadvertently alienating ethnic groups. The military will push back against any attempts to undermine its economic or political interests.

scholarly journals Spatial and Temporal Entropies in the Spanish Football League: A Network Science Perspective

Entropy ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 172 ◽  
Author(s):  
Johann H. Martínez ◽  
David Garrido ◽  
José L Herrera-Diestra ◽  
Javier Busquets ◽  
Ricardo Sevilla-Escoboza ◽  
...  
Keyword(s):  
Network Science ◽  
Permutation Entropy ◽  
Network Parameter ◽  
Temporal Fluctuations ◽  
Entropy Changes ◽  
Network Parameters ◽  
Spatial Entropy ◽  
Statistical Complexity ◽  
Football Team ◽  
Number Of Passes

We quantified the spatial and temporal entropy related to football teams and their players by means of a pass-based interaction. First, we calculated the spatial entropy associated to the positions of all passes made by a football team during a match, obtaining a spatial entropy ranking of Spanish teams during the 2017/2018 season. Second, we investigated how the player’s average location in the field is related to the amount of entropy of his passes. Next, we constructed the temporal passing networks of each team and computed the deviation of their network parameters along the match. For each network parameter, we obtained the permutation entropy and the statistical complexity of its temporal fluctuations. Finally, we investigated how the permutation entropy (and statistical complexity) of the network parameters was related to the total number of passes made by a football team. Our results show that (i) spatial entropy changes according to the position of players in the field, and (ii) the organization of passing networks change during a match and its evolution can be captured measuring the permutation entropy and statistical complexity of the network parameters, allowing to identify what parameters evolve more randomly.

scholarly journals Identification of Explanatory Variables in Possession of the Ball in High-Performance Women’s Football

2021 ◽  
Vol 18 (11) ◽  
pp. 5922
Author(s):  
Rubén Maneiro ◽  
José Luís Losada ◽  
Claudio A. Casal ◽  
Antonio Ardá
Keyword(s):  
Logistic Regression ◽  
Decision Tree ◽  
High Performance ◽  
Outcome Variable ◽  
World Cup ◽  
Explanatory Variables ◽  
Proposed Model ◽  
Number Of Passes ◽  
Made In ◽  
Women's Football

Women’s football is a phenomenon that is experiencing an unstoppable increase in recent years. The objective of this study was to analyze how ball possessions are performed in high-performance women’s football. For this, the 52 matches played by all the national teams participating in the Women’s World Cup 2015 were analyzed. A total of 3740 ball possessions were examined. Using the “move outcome” variable as a reference criterion, a statistically significant relationship was found between possessions that ended in success and possessions that have failed. Specifically, the successful possessions were those that were made in the offensive zone, with a clear intention to progress towards the rival goal, with a low number of passes, and made in the second half of the matches. The results of the logistic regression showed that the proposed model is statistically significant, with an acceptable explanatory capacity. Finally, the results of the decision tree evidence the success of those possessions aiming at a quick completion, with very few passes and the offensive zone as a priority area for the possession.

Spectrophotometric measurements of objective-prism spectra

1966 ◽  
Vol 24 ◽  
pp. 118-119
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Progress Report ◽  
Two Dimensional ◽  
Objective Prism ◽  
Made In

I should like to give you a very condensed progress report on some spectrophotometric measurements of objective-prism spectra made in collaboration with H. Leicher at Bonn. The procedure used is almost completely automatic. The measurements are made with the help of a semi-automatic fully digitized registering microphotometer constructed by Hög-Hamburg. The reductions are carried out with the aid of a number of interconnected programmes written for the computer IBM 7090, beginning with the output of the photometer in the form of punched cards and ending with the printing-out of the final two-dimensional classifications.

Surface Structure in Microtomed Sections Caused by Glass and Diamond Knives

1971 ◽  
Vol 29 ◽  
pp. 456-457
Author(s):  
J. Temple Black ◽  
William G. Boldosser
Keyword(s):  
Plastic Deformation ◽  
Epoxy Resin ◽  
Carbon Coating ◽  
Surface Damage ◽  
Body Angle ◽  
Normal Manner ◽  
Bottom Side ◽  
Cutting Direction ◽  
Made In ◽  
Diamond Knife

Ultramicrotomy produces plastic deformation in the surfaces of microtomed TEM specimens which can not generally be observed unless special preparations are made. In this study, a typical biological composite of tissue (infundibular thoracic attachment) infiltrated in the normal manner with an embedding epoxy resin (Epon 812 in a 60/40 mixture) was microtomed with glass and diamond knives, both with 45 degree body angle. Sectioning was done in Portor Blum Mt-2 and Mt-1 microtomes. Sections were collected on formvar coated grids so that both the top side and the bottom side of the sections could be examined. Sections were then placed in a vacuum evaporator and self-shadowed with carbon. Some were chromium shadowed at a 30 degree angle. The sections were then examined in a Phillips 300 TEM at 60kv.Carbon coating (C) or carbon coating with chrom shadowing (C-Ch) makes in effect, single stage replicas of the surfaces of the sections and thus allows the damage in the surfaces to be observable in the TEM. Figure 1 (see key to figures) shows the bottom side of a diamond knife section, carbon self-shadowed and chrom shadowed perpendicular to the cutting direction. Very fine knife marks and surface damage can be observed.

Iron storage sites in the myocardium as revealed by cytohistochemistry

1988 ◽  
Vol 46 ◽  
pp. 394-395
Author(s):  
M. Ashraf ◽  
F. Thompson ◽  
S. Miki ◽  
P. Srivastava
Keyword(s):  
Cardiac Tissue ◽  
Coronary Perfusion ◽  
Intracellular Iron ◽  
Ether Anesthesia ◽  
Intense Staining ◽  
Iron Storage ◽  
Thin Sections ◽  
Rat Hearts ◽  
Cacodylate Buffer ◽  
Made In

Iron is believed to play an important role in the pathogenesis of ischemic injury. However, the sources of intracellular iron in myocytes are not yet defined. In this study we have attempted to localize iron at various cellular sites of the cardiac tissue with the ferrocyanide technique.Rat hearts were excised under ether anesthesia. They were fixed with coronary perfusion with 3% buffered glutaraldehyde made in 0.1 M cacodylate buffer pH 7.3. Sections, 60 μm in thickness, were cut on a vibratome and were incubated in the medium containing 500 mg of potassium ferrocyanide in 49.5 ml H2O and 0.5 ml concentrated HC1 for 30 minutes at room temperature. Following rinses in the buffer, tissues were dehydrated in ethanol and embedded in Spurr medium.The examination of thin sections revealed intense staining or reaction product in peroxisomes (Fig. 1).

Microanalysis of precipitates in a ferritic steel

1978 ◽  
Vol 36 (1) ◽  
pp. 618-619
Author(s):  
J.M. Titchmarsh
Keyword(s):  
Ferritic Steel ◽  
Particle Identification ◽  
Energy Dispersive ◽  
Objective Lens ◽  
Ferritic Steels ◽  
Replica Technique ◽  
X Ray ◽  
Large Numbers ◽  
Scanning Transmission ◽  
Made In

The advances in recent years in the microanalytical capabilities of conventional TEM's fitted with probe forming lenses allow much more detailed investigations to be made of the microstructures of complex alloys, such as ferritic steels, than have been possible previously. In particular, the identification of individual precipitate particles with dimensions of a few tens of nanometers in alloys containing high densities of several chemically and crystallographically different precipitate types is feasible. The aim of the investigation described in this paper was to establish a method which allowed individual particle identification to be made in a few seconds so that large numbers of particles could be examined in a few hours.A Philips EM400 microscope, fitted with the scanning transmission (STEM) objective lens pole-pieces and an EDAX energy dispersive X-ray analyser, was used at 120 kV with a thermal W hairpin filament. The precipitates examined were extracted using a standard C replica technique from specimens of a 2¼Cr-lMo ferritic steel in a quenched and tempered condition.

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