scholarly journals Selected Goal – Scoring Characteristics in the National Hockey League

2021 ◽  
Vol 61 (2) ◽  
pp. 228-237
Author(s):  
Silvio Parničan ◽  
Pavol Peráček ◽  
Igor Tóth
Keyword(s):  
Ice Hockey ◽  
National Hockey League ◽  
Training Process ◽  
Significance Level ◽  
Game Situation ◽  
Post Hoc ◽  
Number Of Passes ◽  
Determining Factor ◽  
One Way Anova ◽  
Location Zone

Summary The variables impacting the efficiency of the offensive phase of the game in ice hockey may be determining factor for both the training process and game strategies. The research aimed to acquire and expand the knowledge about selected goal-scoring characteristics in the National Hockey League. A total of 511 even-strength goals were recorded in 129 randomly selected games in a regular-season 2020/2021 by indirect observation. Goals were differentiated by selected variable dimensions: location of the offensive team’s puck possession gain before scoring a goal, game situation preceding a goal, and the number of passes of the offensive team preceding a goal. Data were analyzed by performing a one–way ANOVA. Post hoc multiple comparisons were performed using the Tukey HSD test. The significance level of p ≤ 0.05 was used. Significant differences were found within all variable dimensions (p= 0.00001). In terms of the puck possession gain location, zone 1 (along the boards in the offensive zone) was the zone with the significantly highest mean score (p= 0.00305). Offensive zone play was significantly the game situation preceding most of the goals (p= 0.00000). The interval of the passes that preceded most of the recorded goals was the interval of 1 – 2 passes (p= 0.00000). Acquired results point out the dominance of particular variables and may help coaches to determine the content of the training process and game strategies. Based on the assumption of the realization of similar research in different environments in terms of the quality and age category, if the analogy would be found between the results of the present study and the results of potential studies, we can state the trends applicable to youth training.

scholarly journals MORPHOLOGICAL ADJUSTMENTS OF THE RADIAL NERVE ARE INTENSITY-DEPENDENT

2017 ◽  
Vol 23 (1) ◽  
pp. 55-59 ◽  
Author(s):  
Patrícia Oliva Carbone ◽  
Walter Krause Neto ◽  
Eliane Florencio Gama ◽  
Wellington de Assis Silva ◽  
Thatiana Lacerda Nobre ◽  
...  
Keyword(s):  
Radial Nerve ◽  
Morphological Analysis ◽  
Morphological Changes ◽  
The Other ◽  
Significance Level ◽  
Training Groups ◽  
Transmission Electron ◽  
Post Hoc ◽  
And Training ◽  
One Way Anova

ABSTRACT Introduction: Peripheral nerve adaptation is critical for strength gains. However, information about intensity effects on nerve morphology is scarce. Objective: To compare the effects of different intensities of resistance training on radial nerve structures. Methods: Rats were divided into three groups: control (GC), training with 50% (GF1) and training 75% (GF2) of the animal’s body weight. The morphological analysis of the nerve was done by light and transmission electron microscopy. One-way ANOVA and the Tukey’s post hoc test were applied and the significance level was set at p≤0.05. Results: Training groups had an increase of strength compared to GC (p≤0.05). All measured nerve components (mean area and diameter of myelin fibers and axons, mean area and thickness of the myelin sheath, and of neurofilaments and microtubules) were higher in GF2 compared to the other (p≤0.05). Conclusion: Results demonstrated greater morphological changes on radial nerve after heavier loads. This can be important for rehabilitation therapies, training, and progression.

scholarly journals Game Spacing and Density in Relation to the Risk of Injuries in the National Hockey League

2021 ◽  
Vol 9 (4) ◽  
pp. 232596712199940
Author(s):  
Benjamin N. Blond ◽  
Joshua B. Blond ◽  
Paul J. Loscalzo
Keyword(s):  
Injury Severity ◽  
Ice Hockey ◽  
National Hockey League ◽  
Significant Group ◽  
Injury Rates ◽  
Significant Group Difference ◽  
Increased Risk ◽  
Significant Difference ◽  
Density Analysis ◽  
Post Hoc

Background: Ice hockey has significant workload demands. Research of other sports has suggested that decreased rest between games as well as an increased workload may increase the risk of injuries. Purpose: To evaluate whether condensed game schedules increase the frequency and severity of injuries in the National Hockey League (NHL). Study Design: Descriptive epidemiology study. Methods: Data were obtained from publicly available online sources on game schedules and injuries for all NHL teams for the 2005-2006 through 2018-2019 seasons. Injury rates (per team per game) and the proportion of severe and nonsevere injuries were determined. The game-spacing analysis assessed the risk of injuries in relation to the number of days between games played (range, 0-≥6 days). The game-density analysis assessed the risk of injuries in relation to the number of games played within 7 days (range, 1-5 games). Results were assessed by analysis of variance, the post hoc Tukey test, and the chi-square test of distribution. Results: The game-spacing analysis included 33,170 games and 7224 injuries, and a significant group difference was found ( P = 1.44×10–5), with the post hoc test demonstrating an increased risk of injuries when games were spaced with <1 day of rest. There was no significant difference in the ratio of severe to nonsevere injuries. The game-density analysis included 33,592 games and 10,752 injuries, and a significant group difference was found ( P = 8.22×10–48), demonstrating an increased risk of injuries with an increased number of games in all conditions except for the comparison between 4 versus 5 games in 7 days. There was also a significant difference in injury severity ( P = .008), indicating that the least dense condition had a higher ratio of severe to nonsevere injuries compared with the other game-density conditions. Finally, the game-density analysis was repeated after excluding games played with <1 day of rest, and the finding of increased injury rates with increasingly condensed schedules remained significant ( P = 9.52×10–46), with significant differences between all groups except for the comparison between 1 versus 2 games in 7 days. Conclusion: We found that a condensed schedule and <1 day of rest between games were associated with an increased rate of injuries in the NHL. These findings may help in the design of future game schedules.

scholarly journals The absence of fans removes the home advantage associated with penalties called by National Hockey League referees

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0256568
Author(s):  
Joël Guérette ◽  
Caroline Blais ◽  
Daniel Fiset
Keyword(s):  
Decision Making ◽  
Professional Sports ◽  
Ice Hockey ◽  
National Hockey League ◽  
Ecological Context ◽  
Home Team ◽  
Home Advantage ◽  
Using Data ◽  
Post Hoc ◽  
New Evidence

The COVID-19 pandemic has had a major impact on professional sports, notably, forcing the National Hockey League to hold its 2020 playoffs in empty arenas. This provided an unprecedented opportunity to study how crowds may influence penalties awarded by referees in an ecological context. Using data from playoff games played during the COVID-19 pandemic and the previous 5 years (n = 547), we estimate the number of penalties called by referees depending on whether or not spectators were present. The results show an interaction between a team’s status (home; away) and the presence or absence of crowds. Post-hoc analyses reveal that referees awarded significantly more penalties to the away team compared to the home team when there is a crowd present. However, when there are no spectators, the number of penalties awarded to the away and home teams are not significantly different. In order to generalize these results, we took advantage of the extension of the pandemic and the unusual game setting it provided to observe the behavior of referees during the 2020–2021 regular season. Again, using data from the National Hockey League (n = 1639), but also expanding our sample to include Canadian Hockey League games (n = 1709), we also find that the advantage given to the home team by referees when in front of a crowd fades in the absence of spectators. These findings provide new evidence suggesting that social pressure does have an impact on referees’ decision-making, thus contributing to explain the phenomenon of home advantage in professional ice hockey.

scholarly journals Evaluation of Perception and Care in the Sanitation of Toothbrushes

2018 ◽  
Vol 20 (1) ◽  
pp. 20
Author(s):  
Beatriz Cavalcante Pereira ◽  
Gabriela Evangelista de Vasconcelos ◽  
Diala Aretha de Sousa Feitosa
Keyword(s):  
Descriptive Analysis ◽  
Dental Students ◽  
Significance Level ◽  
Adequate Information ◽  
The Subject ◽  
Knowledge And Practice ◽  
Post Hoc ◽  
And Storage ◽  
One Way Anova ◽  
The Ideal

As escovas dentais são contaminadas diariamente por bactérias presentes na cavidade oral ou no meio externo, por isso são consideradas depósitos de microorganismos, capazes de causar e transmitir doenças. O presente trabalho teve como objetivo avaliar o conhecimento e práticas quanto à higienização e armazenamento das escovas dentais, a fim de comparar ações executadas por grupos diferentes, e identificar falta de informações adequadas frente ao assunto. Os dados foram coletados através de questionários, em que foram avaliados três grupos experimentais: 1- Pacientes (n=50) atendidos no Sistema Único de Saúde (SUS), 2- Acadêmicos de Odontologia (n=50) do Centro Universitário Doutor Leāo Sampaio e 3- Cirurgiões-dentistas (n=50) de Juazeiro do Norte, Ceará. Foi realizada análise descritiva de distribuição de frequência, Anova 1 critério e teste post hoc de Bonferroni foram os testes utilizados, adotando-se um nível de significância de 5%. Na presente pesquisa, constatou-se que o grupo dos Cirurgiões-dentistas tem maior conhecimento e praticam melhores ações quanto às práticas de higienização das escovas dentais, superior ao grupo dos Acadêmicos e esses dos Pacientes. Porém, em relação ao armazenamento, os grupos demostraram não ter conhecimento acerca do local mais adequado e da maneira ideal para armazenar suas escovas. Conclui-se que, o grupo dos Cirurgiões-dentistas realiza a maior parte das manobras aconselháveis sobre os cuidados frente a higienização das escovas dentais relacionado aos outros grupos em questão, apesar de não ter conhecimento acerca de novas tecnologias para desinfecção das escovas.Palavras-chave: Contaminação. Escovação Dentária. Saúde Bucal.Abstract Toothbrushes are daily contaminated by bacteria in the oral cavity or outside, therefore they are considered containers for microorganisms, capable of causing and transmitting diseases. The current work aimed to evaluate the knowledge and practices regarding hygiene and storage of toothbrushes, in order to compare actions executed by different groups, and identify the lack of adequate information when facing the subject. Data were collected through a questionnaire, in which three experimental groups were evaluated: 1- patients (n=50) treated at Sistema Único de Saúde (SUS), 2- Dental students (n=50) from Centro Universitário Doutor Leão Sampaio and 3- Dental clinicians (n=50) from Juazeiro do Norte. A descriptive analysis of frequency distribution was performed, and One Way Anova and Bonfrerroni Post Hoc tests were performed, at a significance level of 5%. In the current research, it was found that the group of Dentists has a greater knowledge and practice better actions regarding the toothbrushes sanitation , higher than that of the group of Students, which was better that that of the group of Patients. However, regarding storage, the groups demonstrated to have not enough information regarding the adequate place and the ideal manner of storing their toothbrushes. It was concluded that, the group of Dentists performs the most part of recommended maneuvers regarding the care for toothbrushes hygiene compared to the other evaluated groups.Keywords: Contamination. Toothbrushing. Oral Health.

scholarly journals Effect of COVID-19 Pandemic on the Levels of Empathy among Undergraduate Dental Students in Pakistan

2020 ◽  
Vol 14 (S 01) ◽  
pp. S110-S115
Author(s):  
Sundas Ghaus ◽  
Madiha Abdul Waheed ◽  
Shahreen Zahid Khan ◽  
Laila Mustafa ◽  
Sohaib Siddique ◽  
...  
Keyword(s):  
Dental Students ◽  
Cross Sectional Survey ◽  
Chi Square ◽  
Cross Sectional ◽  
Significance Level ◽  
Significant Difference ◽  
Chi Square Test ◽  
Post Hoc ◽  
The Impact ◽  
One Way Anova

Abstract Objective The purpose of our study is to determine the effect of coronavirus disease 2019 (COVID-19) on the levels of empathy toward patients among undergraduate dental students in Pakistan. Materials and Methods A cross-sectional, survey-based study was conducted at Islamic International Dental College, Islamabad, Pakistan. After taking an informed consent, a validated and pretested Toronto Empathy Questionnaire (TEQ) was distributed amongst the undergraduate dental students at two points, one before the COVID-19 existed, and the other after August 7th, 2020, when the COVID-19 cases dropped in Pakistan. Responses were indicated on a five point Likert Scale. Statistical Analysis A one-way ANOVA (analysis of variance) was used to compare the TEQ scores between the different years of education at the dental school. Difference within the groups was analyzed using the post-hoc Tukey test. Pre- and post-COVID-19 comparison was done using the Chi-square test (significance level p < 0.05). Results A total of 221 out of 260 students in the pre-COVID-19 group, while 210 out of 260 students in the post-COVID-19 group enrolled in the dentistry program participated in the study. Significant difference in the empathy levels was observed in the pre- and post-COVID-19 groups of the same population, i.e., (p < 0.05). The response rate was 85%. Conclusions This study showed an increase in mean empathy scores among the undergraduate dental students after COVID-19, indicating a significant improvement in their empathy levels during the time of COVID-19. It highlights the impact of the pandemic, whereby death and chaos seem to have brought about an improvement in interpersonal harmony.

scholarly journals The Effect of Problem Based Learning and Teams Games Tournaments Model to Improve Competencies

2018 ◽  
Vol 24 (1) ◽  
pp. 137-146
Author(s):  
Eko Swi Damarwan ◽  
Haryanto Haryanto ◽  
La Tara
Keyword(s):  
Problem Based Learning ◽  
Significance Level ◽  
Analysis Techniques ◽  
Instrument Validity ◽  
Tukey Test ◽  
Learning Teams ◽  
Quasi Experimental ◽  
Post Hoc ◽  
Instrument Reliability ◽  
One Way Anova

This paper explores the potential of problem based learning and teams games tournaments model to improve students’ competencies. The objective of the study was to know the differences in the achievement of basic electrical and electronic competencies of students in terms of cognitive and psychomotor aspects using problem based learning model, teams games tournaments, and conventional learning. This was a quasi-experimental study. Instrument validity was measured through expert judgments and instrument reliability with Spearman Brown. Data collection used a pretest, a posttest, and skill observations. Data analysis techniques used one way ANOVA and a Tukey's post hoc test with a significance level of 0.05. The results revealed (1) differences in the achievement of basic electrical and electronic competencies of students in terms of cognitive and psychomotor aspects between using problem based learning, Teams Games Tournaments, and conventional learning, and (2) the results of the Tukey test showed the sequence of achievement of cognitive and psychomotor aspects of the best as follow: the model of teams games tournaments, problem based learning, and conventional learning.

scholarly journals Comparison of Screw-In Forces during Movement of Endodontic Files with Different Geometries, Alloys, and Kinetics

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1506 ◽  
Author(s):  
Sang Won Kwak ◽  
Chan-Joo Lee ◽  
Sung Kyo Kim ◽  
Hyeon-Cheol Kim ◽  
Jung-Hong Ha
Keyword(s):  
Rotation Speed ◽  
Nickel Titanium ◽  
Sectional Area ◽  
Cross Sectional ◽  
Significance Level ◽  
Contact Points ◽  
Heat Treated ◽  
Working Length ◽  
Post Hoc ◽  
One Way Anova

This study compared the maximum screw-in forces of various instruments during their movements. Forty simulated canals in resin blocks were randomly divided into four groups (n = 10): ProTaper Universal F2, ProTaper Gold F2, WaveOne Primary, and WaveOne Gold Primary. To standardize a lumen size, all artificial canals were prepared with ProTaper Universal F1. The rotation speed was set at 350 rpm with an automated 4 mm pecking motion at a speed of 1 mm/s. The pecking depth was increased by 1 mm for each pecking motion until the file reached the working length. During instrumentation, screw-in forces were automatically recorded by customized software. Maximum screw-in forces were analyzed by one-way ANOVA and Tukey’s post hoc comparison with the significance level at 0.05. WaveOne Gold files generated the lowest maximum screw-in forces, followed by ProTaper Gold, WaveOne, and ProTaper Universal (p < 0.05). Under the condition of this study, heat-treated nickel–titanium (NiTi) files with smaller cross-sectional area, fewer contact points, and reciprocating movements resulted in a lower screw-in effect.

scholarly journals Effects of repeated sterilization cycles on the surface alterations of ProTaper Next, TF Adaptive, HyFlex CM, and 2Shape instruments

2021 ◽  
Vol 15 (2) ◽  
pp. 76-81
Author(s):  
Olcay Özdemir ◽  
Sibel Koçak ◽  
Mustafa Murat Koçak ◽  
Baran Can Sağlam
Keyword(s):  
Statistical Significance ◽  
Three Dimensional ◽  
Maximum Height ◽  
Significance Level ◽  
Atomic Force ◽  
Surface Topographies ◽  
Superior Surface ◽  
Group 2 ◽  
Post Hoc ◽  
One Way Anova

Background. This study aimed to evaluate the effects of repeated sterilization cycles on the surface alterations of various nickel-titanium instruments, including ProTaper Next (PTN), TF Adaptive (TFA), HyFlex CM (HCM), and 2Shape (2S). Methods. Twenty-four new NiTi files of four different alloys were selected. The instruments in each group were divided into two equal groups, as follows: control and sterilization. The first group was chosen as the control without applying any sterilization procedure, while in group 2, five cycles of sterilization procedures were applied. The surface topographies were evaluated using scanning electron microscope (SEM) and atomic force microscope (AFM). The root mean square (RMS) and maximum height (MH) values and three-dimensional images were recorded. The data were analyzed with the Shapiro-Wilk test, one-way ANOVA, and post hoc Tukey tests. The statistical significance level was set at P≤0.05. Results. Before the experiment, HCM demonstrated the highest RMS value, and 2S showed the lowest. After the procedures, the RMS and MH values deteriorated on the surface of PTX, TFA, and 2S (P<0.001). The HCM was not affected by sterilization processes (P>0.05). Conclusion. The initial irregularity on the surface did not affect the rate of alteration. The HCM files demonstrated superior surface properties after several cycles of sterilization. The PTN, TFA, and 2S presented similar surface responses after five cycles of autoclave sterilization.

scholarly journals The Photobiomodulation Effect of 940nm Laser Irradiation on Enterococcus faecalis in Human Root Dentin Slices of Varying Thicknesses

2021 ◽  
Vol 12 (1) ◽  
pp. e48-e48
Author(s):  
Bryan Martin Sher ◽  
Riaan Mulder ◽  
Norbert Gutknecht
Keyword(s):  
Laser Irradiation ◽  
Enterococcus Faecalis ◽  
Continuous Wave ◽  
Laser Energy ◽  
Positive Control ◽  
Significance Level ◽  
Colony Forming Units ◽  
Root Dentin ◽  
Post Hoc ◽  
One Way Anova

Introduction: An increase in dentine thickness could result in an inadequate depth of laser energy penetration. This study aimed to evaluate the effect of a 940 nm laser on Enterococcus faecalis through varying thicknesses of human root dentin slices. Methods: Thirty-five dentin slices of root dentin with thicknesses ranging between 500 and 3000 µm were produced. Six experimental groups (500, 1000, 1500, 2000, 2500, and 3000 µm (n=5 each) were lased and the seventh, non-lased group served as the positive control with a dentine thickness of 2000 µm. The slices were inoculated with 2 µL of E. faecalis suspension of 1.5 × 108 E. faecalis cells/mL. All the lased slices were lased from the opposing side of the inoculation. A non-initiated 200 μm bare end fibre at the power of 1 W, in a continuous wave was used. Four doses of laser irradiation of 5 seconds with a side to side movement with the tip held at a 5º angle to the dentine slice were performed. The colony-forming units of E. faecalis were determined and the bacterial photobiomodulation effect analysed using one-way ANOVA with a Bonferroni and Holm post hoc test at a significance level of P>0.05. Results: There were statistical differences between the dentin slices of 500, 1000, and 1500 μm treated with the laser compared to the positive control (P<0.01). However, there were no statistical differences between the lased 2000 and 2500 μm slices compared to the positive control. There was significantly more photobiomodulation of the E. faecalis for the dentine slices of 3000 μm than the positive control (P<0.01). Conclusion: Laser treatment through dentine slices of 2000 μm and thinner significantly reduced bacterial growth. The photobiomodulation effects started to occur in dentine slices thicker than 2500 μm compared to the positive control.

scholarly journals Female Athletes And Performance-Enhancer Usage

2007 ◽  
Vol 4 (12) ◽  
Author(s):  
Barbara K. Fralinger ◽  
Genevieve Pinto-Zipp ◽  
Valerie Olson ◽  
Susan Simpkins
Keyword(s):  
Female Athletes ◽  
School Level ◽  
Spearman Correlation ◽  
High School Level ◽  
Chi Square ◽  
Significance Level ◽  
Prevention Education ◽  
Athletic Coaches ◽  
Post Hoc ◽  
One Way Anova

The purpose of this study was to develop a knowledge base on factors associated with performance-enhancer usage among female athletes at the high school level in order to identify markers for a future prevention-education program.  The study used a pretest-only, between-subjects Likert Scale survey to rank the importance of internal and external pressures that may lead to performance-enhancer usage among this population.  Subjects included 122 female athletes from top-ranked sport programs at 7 New Jersey high schools.  Descriptive and quantitative statistics were used to analyze the data at a p<.05 significance level.  The Chi Square Test of Homogeneity, Spearman Correlation Coefficient, Kruskal-Wallis One-Way ANOVA, and Scheffé Post-Hoc Test were used to analyze associations between the nine survey issues and five levels of importance.  Results indicated that subjects rated the pressure to win and self-induced competitive pressures as the two most important factors in leading to performance-enhancer usage.  Chi-Square results showed significant differences in the level of importance for each of the nine issues presented, while the Spearman Correlation revealed several correlations among certain issues.  The Kruskal-Wallis One-Way ANOVA showed significant differences in ranks when data were grouped by school and sport.  Post-Hoc analysis supported findings of the Kruskal-Wallis One-Way ANOVA.  This study provided descriptive and quantitative data that added to the existing research.  The findings may be used by health educators and athletic coaches for performance-enhancer prevention-education programs.

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