scholarly journals Variation of match statistics and football teams’ match performance in the group stage of the UEFA Champions League from 2010 to 2017

Kinesiology ◽  
2019 ◽  
Vol 51 (2) ◽  
pp. 170-181 ◽  
Author(s):  
Qing Yi ◽  
Miguel-Ángel Gómez ◽  
Hongyou Liu ◽  
Jaime Sampaio
Keyword(s):  
Correlation Analysis ◽  
Linear Model ◽  
Specific Training ◽  
Stable Match ◽  
Training Interventions ◽  
Coefficients Of Variation ◽  
Function Correlation ◽  
Key Indicators ◽  
Performance Results ◽  
Negative Relationships

The aim of this study was to identify the relationships between the variation of match variables and teams’ match performance. Data from all 768 matches played at the group stage of the UEFA Champions League from season 2009/1010 to 2016/2017 were analysed. The non-clinical magnitude-based inferences were used to identify the differences of technical variation between the teams. Autocorrelation function, correlation analysis and generalised linear model were used to examine the relationships between the variation of match variables and teams’ match performance. Results showed that the qualified teams demonstrated a more stable match performance on the variables related to goal scoring, attacking and passing, while the non-qualified teams displayed a more stable match performance on the variables related to defending. The coefficients of variation (CV) of all the variables related to goal scoring and the variables related to attacking and passing showed negative relationships with the teams’ match performance, while the CVs of the variables related to defending showed positive relationships with the teams’ match performance. Findings of this study can provide useful information about the fluctuation of match variables, contributing to the development of specific training interventions to enhance teams’ performance in key indicators.

scholarly journals Studying the Influences of Bus Stop Type and Specifications on Bicycle Flow and Capacity for Better Bicycle Efficiency

Information ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 370
Author(s):  
Xingchen Yan ◽  
Jun Chen ◽  
Xiaofei Ye ◽  
Tao Wang ◽  
Zhen Yang ◽  
...  
Keyword(s):  
Correlation Analysis ◽  
Comparative Study ◽  
Traffic Flow ◽  
Video Recording ◽  
Width Ratio ◽  
Total Width ◽  
Track Width ◽  
Bus Stop ◽  
Negative Relationships ◽  
Setting Parameters

This study aimed to explore the effects of type and specifications of bus stop on bicycle speed and cycle track capacity. This paper investigates the traffic flow operations of tracks at basic sections, curbside stops, and bus bays by video recording. T-test and comparative study were used to analyze the influences of stop types on bicycle speed and capacity of track. The relationships between stop specifications and speed and capacity of track are analyzed with correlation analysis. The main results are as follows: (1) Without passengers crossing, bus bays have significant impact on bicycle speed, while it is not for curbside stops; (2) except platform length, there are strong negative relationships between bicycle speed and density of platform access, total width of platform accesses (TWPA), total width of platform accesses-to-platform length ratio (TWPA-to-PL ratio), total width of platform accesses-to-track width ratio (TWPA-to-TW ratio); (3) curbside stop and bus bay reduce track capacities by 32% and 13.5% on average, respectively; and (4) in contrast to bus bays, curbside stops have more significant impact on capacity of track, which also presents in the influence of the setting parameters of stops. Based the results above, some suggestions on stop specifications are finally proposed.

scholarly journals Determinants of Capital Structure in Bahrain Stock Market

2016 ◽  
Vol 3 (2) ◽  
pp. 177
Author(s):  
Abdelrhman Ahmad Meero
Keyword(s):  
Regression Analysis ◽  
Correlation Analysis ◽  
Stock Market ◽  
Capital Structure ◽  
Linear Model ◽  
Significant Relationship ◽  
Correlation And Regression Analysis ◽  
Dependent Variables ◽  
The Relationship ◽  
Industrial Investment

The aim of this paper is to examine the determinants of capital structure (profitability, size, risk and growth). The sample is composed of 39 Bahraini firms listed in Bahrain Stock Market. The study covered the period 2011-2015. Correlation and regression analysis have been used to identify the relationship between the capital structure determinants and debt leverages (book leverage and market leverage). Correlation analysis aims to identify this relationship at market level and at sectorial level. Regression analysis objective is to anticipate the models characterizing the relationships between determinants and capital leverages. Results of the analysis shows negative significant relationship between profitability and dependent variables, with more significance relationship with market leverage. This relationship is demonstrated in market level and in insurance and services sectors between profitability and book leverage. When the market leverage is the dependent variable this relationship is valid in market level and in banking, hotels, insurance and services sectors. Positive significant relationship has been found between size and both leverages in market level. Similar result is detected on sectorial level in banking, industrial, investment and services when the dependent variable is book leverage. Size-market leverage relationship is positive and significant also in insurance, investment and services sectors. The relationship risk—book leverage is significant only on sectorial level in Industrial, insurance and investment sectors. In term of market leverage—risk relationship, significant relationship is detected in market level and in investment and services sectors. Regression analysis results present a significant linear model reflecting the relationship between determinants of capital structure and leverages.

scholarly journals Determination of the smoothing ability of the vibration mixer on the basis of the correlation analysis

2019 ◽  
Vol 80 (4) ◽  
pp. 30-34
Author(s):  
D. M. Borodulin ◽  
A. B. Shushpannikov ◽  
T. V. Zorina ◽  
E. A. Shushpannikov ◽  
V. N. Ivanets
Keyword(s):  
Correlation Analysis ◽  
Material Balance ◽  
Working Hours ◽  
Bulk Materials ◽  
Continuous Action ◽  
Key Indicators ◽  
Relationship Of ◽  
Ratio Of Components

Now the increasing popularity is received by food semi-finished products from the bulk materials. With increase in volume of their production it is expedient to mix powdery materials in the mixers of continuous action. For the set working hours of the mixers of continuous action the movement of material in the device is considered to be casual stationary processes between which there is relationship of cause and effect. Key indicators for her assessment is the correlation coefficient, population mean and dispersion. Communication between entering and going out of the device signals is established by means of the equations of material balance, describing expenses of streams of bulk stochastic stationary functions X (t). Further, finding probabilistic characteristics of the entering and leaving signals, it is possible to judge "quality" of operation of the mixer or to select the required topology of streams in the hardware environment by comparison of the relations of their dispersions or mean square deviations. In this work the scheme of the movement of material streams in the mixer developed by us realizing a method of "consecutive dilution" is considered. By means of the system of the equations of the material balance displaying process of the movement of material in the mixers of continuous action of vibration type influence of recirculation on the smoothing properties of the device is considered. Values of size of the smoothing ability of S from recirculation coefficient ? and quantities of rounds of n are given. It is revealed that increase in the smoothing ability leads to increase of quantity of rounds, and respectively and dimensions of the mixers of continuous action of vibration type, therefore, it is expedient to use the mixer with quantity of rounds equal 6 and coefficient of recirculation equal 0.7 as at the same time the smoothing ability equal is enough 1753 for receiving qualitative ready mix at a ratio of components 1:50. By means of the correlation analysis it is possible to predict uniformity of a material stream at the device exit at the known values of the time spent in him of material, coefficients of recirculation and dispersion of an entrance signal.

scholarly journals Hemoglobin A1c Point-of-Care Assays; A New World with a Lot of Consequences!

2009 ◽  
Vol 3 (3) ◽  
pp. 418-423 ◽  
Author(s):  
Erna Lenters-Westra ◽  
Robbert J. Slingerland
Keyword(s):  
Nurse Practitioners ◽  
Hemoglobin A1c ◽  
Clinical Laboratory ◽  
Point Of Care ◽  
Care Center ◽  
Venous Blood ◽  
Coefficients Of Variation ◽  
Rapid Result ◽  
Performance Results ◽  
Clinical Laboratory Improvement Amendments

Background: Point-of-care instruments for the measurement of hemoglobin A1c (HbA1c) may improve the glycemic control of people with diabetes by providing a rapid result if the performance of the instruments used is acceptable. A 0.5% HbA1c difference between successive results is considered a clinically relevant change. With this in mind, the In2it from Bio-Rad and the DCA Vantage from Siemens were evaluated according to Clinical and Laboratory Standards Institute (CLSI) protocols. Methods: The CLSI protocols EP-5 and EP-9 were applied to investigate precision, accuracy, and bias. The bias was compared with three certified secondary reference measurement procedures. Differences between capillary and venous blood were investigated by an end-user group consisting of nurse practitioners at a diabetes care center. Results: At HbA1c levels of 5.1 and 11.2%, total coefficients of variation (CV) for the In2it were 4.9 and 3.3%, respectively, and for the DCA Vantage were 1.7 to 1.8% and 3.7 to 5.5% depending on the lot number of the cartridges. Method comparisons showed significant lot number-dependent results for the In2it and the DCA Vantage compared with the three reference methods. No overall difference was observed between capillary and venous blood for both methods. Conclusion: Performance results of the In2it and the DCA Vantage showed variable and lot number-dependent results. To maintain the interlaboratory CV of 5% for HbA1c, the Clinical Laboratory Improvement Amendments rules for waived point-of-care instruments should be revised. An obligation for participating in external quality schemes and taking adequate action should be considered for POC instruments that perform poorly.

scholarly journals Relationships of sire breeding values and cutting parts of progeny in Czech Fleckvieh bulls

2010 ◽  
Vol 53 (4) ◽  
pp. 415-425
Author(s):  
J. Bezdíček ◽  
J. Říha ◽  
J. Kučera ◽  
A. Dufek ◽  
M. Bjelka ◽  
...  
Keyword(s):  
Correlation Analysis ◽  
Linear Combination ◽  
Breeding Value ◽  
Linear Combinations ◽  
Dual Purpose ◽  
Breeding Values ◽  
Strip Loin ◽  
Shoulder Blade ◽  
Negative Relationships ◽  
Daily Gain

Abstract. The aim of this study was to assess the effect of the meat yield breeding values of sires on highly valued parts of carcasses in their progeny. The study was carried out on Czech Fleckviehs, a breed dual purpose milk-beef production. Cutting parts evaluated were: round, strip loin and tender loin (first-class meat); rib, shoulder blade (boneless), fore shank, flank, chuck roll + neck (second-class meat) and separable fat. The correlation analysis showed significant negative relationships only for the relative breeding values of trading classes and the rib (r=−0.2079); relative breeding values of net daily gain with strip loin (r=−0.2433). Although strip loin is an important first-class meat cut, the correlation is rather low. Correlations between other meat cuts with breeding values were non-significant. The correlation between meat cuts and age showed the same pattern as correlations between meat cuts and weight at slaughter. Significant negative correlations were found between first-class meat and increasing age (r=−0.1979) and weight (r=−0.2884). In contrast, for second-class meat there were positive correlation with increasing age and weight (r=0.3489 for age, r=0.4495 for weight). This also corresponds with the correlation between age or weight and specific first-class meat cuts (tender loin r=−0.2804, r=−0.3413, strip loin r=−0.3710, r=−0.2012) and second-class meat (sep. fat r=+0.2360, r=+0.2951, r for correlation with age and weight respectively). Based on the calculations of canonical analysis 27.75 % explained variability was found for variables relative breeding value of net daily gain (RBVndg), relative breeding value of trading class (RBVtc), age and weight using a linear combination of variables for individual cuts. At the same time, 14.25 % explained variability was found for cut variables which can be expressed using linear combinations of RBVndg, RBVtc, age and weight.

scholarly journals The effects of relative food item size on optimal tooth cusp sharpness during brittle food item processing

2014 ◽  
Vol 11 (101) ◽  
pp. 20140965 ◽  
Author(s):  
Michael A. Berthaume ◽  
Elizabeth R. Dumont ◽  
Laurie R. Godfrey ◽  
Ian R. Grosse
Keyword(s):  
Food Item ◽  
Radius Of Curvature ◽  
Fe Model ◽  
Tooth Shape ◽  
Coefficients Of Variation ◽  
Selective Forces ◽  
Item Size ◽  
The Relationship ◽  
Negative Relationships ◽  
Shape Analyses

Teeth are often assumed to be optimal for their function, which allows researchers to derive dietary signatures from tooth shape. Most tooth shape analyses normalize for tooth size, potentially masking the relationship between relative food item size and tooth shape. Here, we model how relative food item size may affect optimal tooth cusp radius of curvature (RoC) during the fracture of brittle food items using a parametric finite-element (FE) model of a four-cusped molar. Morphospaces were created for four different food item sizes by altering cusp RoCs to determine whether optimal tooth shape changed as food item size changed. The morphospaces were also used to investigate whether variation in efficiency metrics (i.e. stresses, energy and optimality) changed as food item size changed. We found that optimal tooth shape changed as food item size changed, but that all optimal morphologies were similar, with one dull cusp that promoted high stresses in the food item and three cusps that acted to stabilize the food item. There were also positive relationships between food item size and the coefficients of variation for stresses in food item and optimality, and negative relationships between food item size and the coefficients of variation for stresses in the enamel and strain energy absorbed by the food item. These results suggest that relative food item size may play a role in selecting for optimal tooth shape, and the magnitude of these selective forces may change depending on food item size and which efficiency metric is being selected.

scholarly journals Lidiando con el burnout: Análisis de relaciones lineales, no lineales y de interacción.

2017 ◽  
Vol 33 (3) ◽  
pp. 722 ◽  
Author(s):  
José García-Arroyo ◽  
Amparo Osca
Keyword(s):  
Linear Model ◽  
Personal Accomplishment ◽  
Future Research ◽  
Interaction Models ◽  
College Professors ◽  
Non Linear ◽  
Adaptive Nature ◽  
The Relationship ◽  
Negative Relationships ◽  
Practical Implications

<p><span style="font-family: Times New Roman; font-size: medium;">This study analyzes the relationship between action-focused coping, emotion-focused coping and burnout dimensions (emotional exhaustion, cynicism and personal accomplishment) by comparing linear, non-linear and interaction models using quadratic regression analysis. The sample consisted of 202 college professors. Variables such as gender or age were not significant when explaining the relationship between coping and burnout. The results show significant negative relationships between emotion-focused coping and exhaustion and cynicism, and positive relationships with personal accomplishment (linear model). They also show that very low or very high levels of emotion-focused coping diminish personal accomplishment significantly (non-linear model), and that the combined effect of strategies is significant, so that when the use of emotion-focused coping is greater than the use of action-focused coping, exhaustion increases and personal accomplishment decreases. These results support the idea that in order to better understand the flexible and adaptive nature of coping and that it operates in a combined process where one strategy affects the other, the application of non-linear and interaction models are very useful. Finally, we discuss the practical implications for future research and for prevention and intervention programs on burnout.</span></p>

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