scholarly journals Análisis del rendimiento a través de la utilización de patrones de actividad temporal en jugadores de elite de vóley playa (Performance analysis through the use of temporal activity patterns of elite players in beach volleyball)

Retos ◽  
2015 ◽  
pp. 67-69
Author(s):  
José Antonio Pérez Turpin ◽  
Juan Manuel Cortell Tormo ◽  
Juan José Chinchilla Mira ◽  
Roberto Cejuela Anta ◽  
Concepción Suárez Llorca
Keyword(s):  
Performance Analysis ◽  
Average Length ◽  
Activity Patterns ◽  
Total Duration ◽  
Specific Training ◽  
The Real ◽  
Absolute Time ◽  
Video Recordings ◽  
Playing Time ◽  
Do So

Para conocer los componentes actuales del rendimiento en vóley playa, es preciso conocer la estructura temporal de la competición. Por ello, el objetivo del presente estudio fue conocer la distribución del tiempo de juego real y absoluto durante el partido, los sets y los puntos en jugadores de vóley playa profesionales. Para esto, se realizaron video grabaciones de 10 jugadores durante cuatro encuentros disputados en el Campeonato de Europa de vóley playa (Valencia 2005). Se cuantificó la duración total de los partidos, sets y puntos al tiempo que se diferenció del tiempo real de juego. Como resultado se observó que la media de tiempo absoluto por partido fue de 37min 17,4s±11min 16,2s mientras que el tiempo real fue de 8min 12s±2min 24s. La duración media del total del tiempo de duración de los sets fue de16min 19,8s±2min 27s. y la real de 3min 25,8s±43,20s. La media de tiempo invertida en la realización del punto fue de 6±0,95s. El conocimiento mejorado del tiempo absoluto y real de juego en los jugadores puede aportar una valiosa información que permita establecer patrones de entrenamiento específicos para el vóley playa.Abstract: In order to identify the real components of beach volleyball performance, we need to know the time structure of the competition. This study was designed to identify the distribution of time in real and absolute play during the matches, sets and points played by professional beach volleyball players. To do so, we made video recordings of 10 players playing four matches at the European Beach Volleyball Championships (Valencia 2005). We measured the total length of the matches, sets and points while differentiating real playing time. We observed that the absolute time per match was 37min 17.4sec±11min 16.2sec, while real playing time was 8min 12sec±2min 24sec. The average length of the total duration of the sets was 16min 19.8sec±2min 27sec and real playing time was 3min 25.8sec±43.20sec. The average time taken to play a point was 6±0.95sec. An improved understanding of absolute and real playing time provides valuable information that allows us to create specific training patterns for beach volleyball.

The Player Load Associated With Typical Activities in Elite Netball

2017 ◽  
Vol 12 (9) ◽  
pp. 1218-1223 ◽  
Author(s):  
Jared A. Bailey ◽  
Paul B. Gastin ◽  
Luke Mackey ◽  
Dan B. Dwyer
Keyword(s):  
Training Programs ◽  
Data Sets ◽  
Specific Training ◽  
Start Time ◽  
Total Load ◽  
Future Design ◽  
Design And Implementation ◽  
Video Recordings ◽  
Wearable Accelerometers

Context:Most previous investigations of player load in netball have used subjective methodologies, with few using objective methodologies. While all studies report differences in player activities or total load between playing positions, it is unclear how the differences in player activity explain differences in positional load. Purpose:To objectively quantify the load associated with typical activities for all positions in elite netball. Methods:The player load of all playing positions in an elite netball team was measured during matches using wearable accelerometers. Video recordings of the matches were also analyzed to record the start time and duration of 13 commonly reported netball activities. The load associated with each activity was determined by time-aligning both data sets (load and activity). Results:Off-ball guarding produced the highest player load per instance, while jogging produced the greatest player load per match. Nonlocomotor activities contributed least to total match load for attacking positions (goal shooter [GS], goal attack [GA], and wing attack [WA]) and most for defending positions (goalkeeper [GK], goal defense [GD], and wing defense [WD]). Specifically, centers (Cs) produced the greatest jogging load, WA and WD accumulated the greatest running load, and GS and WA accumulated the greatest shuffling load. WD and Cs accumulated the greatest guarding load, while WD and GK accumulated the greatest off-ball guarding load. Conclusions:All positions exhibited different contributions from locomotor and nonlocomotor activities toward total match load. In addition, the same activity can have different contributions toward total match load, depending on the position. This has implications for future design and implementation of position-specific training programs.

Tracing the Rift: Heidegger, Hölderlin, and “The Origin of the Work of Art”

2019 ◽  
Vol 53 ◽  
pp. 295-307
Author(s):  
Will McNeill ◽  
Keyword(s):  
Central Concept ◽  
Work Of Art ◽  
The Real ◽  
Philosophical Significance ◽  
To Come ◽  
Central Claim ◽  
Do So

Heidegger’s 1936 essay “The Origin of the Work of Art” is notoriously dense and difficult. In part this is because it appears to come almost from nowhere, given that Heidegger has relatively little to say about art in his earlier work. Yet the essay can only be adequately understood, I would argue, in concert with Heidegger’s essay on Hölderlin from the same year, “Hölderlin and the Essence of Poetizing.” Without the Hölderlin essay, for instance, the central claim of “The Origin of the Work of Art” to the effect that all art is in essence poetizing, Dichtung, can hardly be appreciated in its philosophical significance without the discussions of both essence and poetizing that appear in the Hölderlin essay. This is true of other concepts also. The central concept of the rift (Riß)—the fissure or tear—that appears in “The Origin of the Work of Art” might readily be assumed to be adopted from Albrecht Dürer, whose use of the term Heidegger cites at a key point in the 1936 essay. Here, however, I argue that the real source of the concept for Heidegger is Hölderlin, and that the Riß is, moreover—quite literally—an inscription of originary, ekstatic temporality; that is, of temporality as the “origin” of Being and as the poetic or poetizing essence of art. I do so, first, by briefly considering Heidegger’s references to Dürer in “The Origin of the Work of Art” and other texts from the period, as well as his understanding of the Riß and of the tearing of the Riß in that essay and in its two earlier versions. I then turn to Heidegger’s 1936 Rome lecture “Hölderlin and the Essence of Poetizing,” in order to show the Hölderlinian origins of this concept for Heidegger.

The moral construction of worry about radiation exposure: Emotion, knowledge, and tests

2017 ◽  
Vol 28 (6) ◽  
pp. 635-656 ◽  
Author(s):  
Aug Nishizaka
Keyword(s):  
Radiation Exposure ◽  
Conversation Analysis ◽  
Internal Exposure ◽  
Test Results ◽  
Communication Tool ◽  
Work Related ◽  
Video Recordings ◽  
Moral Construction ◽  
Fukushima Disaster ◽  
Do So

In the analysis of video recordings of the interactions between a doctor and the examinees following internal radiation exposure tests at a hospital in Fukushima Prefecture, I explore how the participants address one of the most serious consequences of the Fukushima disaster, that is, their concerns about radioactive materials. To do so, this study employs conversation analysis. The doctor’s presentation of the test results provides the examinees with a place to express relief and also makes relevant the justification work related to the expression of relief. In conclusion, I consider how the internal exposure tests also function as a communication tool in the context in which residents from affected areas face potential difficulties in expressing their worry about radiation.

scholarly journals Data-driven filtration and segmentation of mesoscale neural dynamics

2021 ◽  
Author(s):  
Sydney C. Weiser ◽  
Brian R. Mullen ◽  
Desiderio Ascencio ◽  
James B. Ackman
Keyword(s):  
Time Series ◽  
Information Flow ◽  
Background Noise ◽  
Activity Patterns ◽  
Data Driven ◽  
Neural Dynamics ◽  
Cortical Surface ◽  
Cerebral Function ◽  
Spatial Segmentation ◽  
Video Recordings

Recording neuronal group activity across the cortical hemispheres from awake, behaving mice is essential for understanding information flow across cerebral networks. Video recordings of cerebral function comes with challenges, including optical and movement-associated vessel artifacts, and limited references for time series extraction. Here we present a data-driven workflow that isolates artifacts from calcium activity patterns, and segments independent functional units across the cortical surface. Independent Component Analysis utilizes the statistical interdependence of pixel activation to completely unmix signals from background noise, given sufficient spatial and temporal samples. We also utilize isolated signal components to produce segmentations of the cortical surface, unique to each individual’s functional patterning. Time series extraction from these maps maximally represent the underlying signal in a highly compressed format. These improved techniques for data pre-processing, spatial segmentation, and time series extraction result in optimal signals for further analysis.

The Ecstatic Realism of the Late Schelling

2017 ◽  
Author(s):  
Sean J. McGrath
Keyword(s):  
German Idealism ◽  
The Real ◽  
Do So

This chapter extracts from the philosophy of the late Schelling, a form of realism called ‘ecstatic realism’. After providing an overview of Schelling’s role in the rise and fall of German idealism, it turns to Schelling’s interpretation of kenosis and its corresponding ontology. It shows that the presupposition of Schelling’s ecstatic realism is an idealism that renounces itself, and can only do so because it necessarily asserts itself at the expense of the real. This dynamic defines the paradoxical relation of negative and positive philosophy in Schelling’s late writings and offers an alternative to the either/or of idealism or realism gripping contemporary debates about correlationism.

Chapter XLVI: Friendly Counsels

2008 ◽  
Author(s):  
Anne Brontë
Keyword(s):  
Real Character ◽  
The Real ◽  
Do So

I Felt strongly tempted, at times, to enlighten my mother and sister on the real character and circumstances of the persecuted tenant of Wildfell Hall; and at first I greatly regretted having omitted to ask that lady’s permission to do so; but, on...

scholarly journals Day and night in the subterranean: measuring daily activity patterns of subterranean rodents (Ctenomys aff. knighti) using bio-logging

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Milene G Jannetti ◽  
C Loren Buck ◽  
Veronica S Valentinuzzi ◽  
Gisele A Oda
Keyword(s):  
Daily Activity ◽  
Activity Patterns ◽  
Extreme Environments ◽  
Total Duration ◽  
Time Of Day ◽  
Constant Darkness ◽  
Subterranean Rodents ◽  
Monte Desert ◽  
Direct Observations ◽  
Desert Rodents

Abstract While most studies of the impacts of climate change have investigated shifts in the spatial distribution of organisms, temporal shifts in the time of activity is another important adjustment made by animals in a changing world. Due to the importance of light and temperature cycles in shaping activity patterns, studies of activity patterns of organisms that inhabit extreme environments with respect to the 24-hour cyclicity of Earth have the potential to provide important insights into the interrelationships among abiotic variables, behaviour and physiology. Our previous laboratory studies with Argentinean tuco-tucos from the Monte desert (Ctenomys aff. knighti) show that these subterranean rodents display circadian activity/rest rhythms that can be synchronized by artificial light/dark cycles. Direct observations indicate that tuco-tucos emerge mainly for foraging and for removal of soil from their burrows. Here we used bio-logging devices for individual, long-term recording of daily activity/rest (accelerometry) and time on surface (light-loggers) of six tuco-tucos maintained in outdoor semi-natural enclosures. Environmental variables were measured simultaneously. Activity bouts were detected both during day and night but 77% of the highest values happened during the daytime and 47% of them coincided with time on surface. Statistical analyses indicate time of day and temperature as the main environmental factors modulating time on surface. In this context, the total duration that these subterranean animals spent on surface was high during the winter, averaging 3 h per day and time on surface occurred when underground temperature was lowest. Finally, transport of these animals to the indoor laboratory and subsequent assessment of their activity rhythms under constant darkness revealed a switch in the timing of activity. Plasticity of activity timing is not uncommon among desert rodents and may be adaptive in changing environments, such as the desert where this species lives.

Doing Waiting: An Ethnomethodological Analysis

2020 ◽  
Vol 49 (4) ◽  
pp. 419-455 ◽  
Author(s):  
Ruth Ayaß
Keyword(s):  
Everyday Life ◽  
Empirical Data ◽  
Physical Environment ◽  
Specific Form ◽  
Ordered Structure ◽  
Material Resources ◽  
Video Recordings ◽  
Spatial Resources ◽  
Do So

Waiting is an activity that is virtually carried out by everybody at every time and everywhere. In contrast to other occupations, such as playing the piano, it does not require painstaking training efforts. Notwithstanding, we do possess methodically employed techniques of indicating to others that we are waiting—that is, we make our waiting recognizable as such. Many forms of waiting in everyday life are bound to specific places: waiting shelters, waiting rooms, waiting halls. The waiting person is thus visible and frequently forms a waiting community with fellow waiting people. Moreover, many forms of waiting take a specific form (a queue). But also in situations where such recognizable social formations are not possible (e.g., when waiting alone), people make clear to themselves and to others that they are waiting. Primarily people waiting in publicly accessible spaces demonstrate to each other and to others what they are doing—that is, waiting. They do so in a methodical way and thus make their actions accountable for themselves and others as an ordered structure. Hence, there is a sense in which waiting people wait competently, making their waiting visible to others as a “doing”—a “doing waiting” in the sense of ethnomethodology. The essay pursues the question of waiting people’s particular handling of the space they are in and the material available to them: which spatial resources are made available to them by the specific locality? Which material resources are provided? In what ways do waiting people make use of this space and the objects to which they have access? How do they use other elements of the physical environment? Which additional resources are brought along? The article addresses these questions by using empirical data of natural situations of waiting (ethnographic fieldnotes, photographs, drawings, and video recordings).

Regular- and postseason comparisons of playing time and measures of running performance in NCAA Division I women soccer players

2015 ◽  
Vol 40 (9) ◽  
pp. 907-917 ◽  
Author(s):  
Adam J. Wells ◽  
Jay R. Hoffman ◽  
Kyle S. Beyer ◽  
Mattan W. Hoffman ◽  
Adam R. Jajtner ◽  
...  
Keyword(s):  
Ncaa Division I ◽  
High Intensity ◽  
High Speed ◽  
Division I ◽  
Soccer Players ◽  
Running Performance ◽  
Transient Motion ◽  
Absolute Time ◽  
Low Intensity ◽  
Playing Time

The management of playing time in National Collegiate Athletic Association (NCAA) soccer athletes may be a key factor affecting running performance during competition. This study compared playing time and running performance between regular-season and postseason competitions during a competitive women’s soccer season. Nine NCAA Division I women soccer players (age, 21.3 ± 0.9 years; height, 170.3 ± 5.7 cm; body mass, 64.0 ± 5.8 kg) were tracked using portable GPS devices across 21 games during a competitive season (regular season (n = 17); postseason (n = 4)). Movements on the field were divided into operationally distinct thresholds defined as standing/transient motion, walking, jogging, low-speed running, moderate-speed running, high-speed running, sprinting, low-intensity running, and high-intensity running. A significant increase in minutes played (+17%, p = 0.010) was observed at postseason compared with the regular season. Concomitant increases in time spent engaged in low-intensity running (LIR: +18%, p = 0.011), standing/transient motion (+35%, p = 0.004), walking (+17%, p = 0.022), distance covered while walking (+14%, p = 0.036), and at low intensity (+11%, p = 0.048) were observed. Performance comparisons between the first and second half within games revealed a significant decrease (p ≤ 0.05) in high-speed and high-intensity runs during the second half of the postseason compared with the regular season. Changes in minutes played correlated significantly with changes in absolute time spent engaged in LIR (r = 0.999, p < 0.001), standing/transient motion (r = 0.791, p = 0.011), walking (r = 0.975, p = 0.001), jogging (r = 0.733, p = 0.025), distance covered while walking (r = 0.898, p < 0.001) and low-intensity activity (r = 0.945, p < 0.001). Negative correlations were observed between minutes played and absolute time sprinting (r = −0.698, p = 0.037) and distance covered sprinting (r = −0.689, p = 0.040). Results indicate that additional minutes played during the postseason were primarily performed at lower intensity thresholds, suggesting running performance during postseason competitions may be compromised with greater playing time in intercollegiate women’s soccer.

Statistical Anomalies Associated with NBA Scorekeepers: A Bootstrap Investigation

2020 ◽  
Vol 14 (1) ◽  
pp. 48-68
Author(s):  
George Diemer ◽  
Jun Woo Kim ◽  
Meredith Kneavel
Keyword(s):  
Prospect Theory ◽  
Trade Negotiations ◽  
Statistical Techniques ◽  
Media Attention ◽  
Playing Time ◽  
Do So

In 2009, a Deadspin article documented how an anonymous NBA scorekeeper skewed statistics for various purposes. This research sets out to test the assertions set forth by the author of the Deadspin piece and uses prospect theory and unique statistical techniques to do so. The findings support the assertions proposed in the Deadspin piece that scorekeepers for various venues are skewing the statistics. The discussion provides suggestions for correcting this bias as well as demonstrates how asymmetric incentives by scorekeepers in favor of the home teams could be misused in determining salaries, playing time, trade negotiations, and media attention.

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