Protective capacity of ice hockey helmets at different levels of striking compliance

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Santiago de Grau ◽  
Andrew Post ◽  
Andrew Meehan ◽  
Luc Champoux ◽  
T. Blaine Hoshizaki ◽  
...  
Keyword(s):  
Ice Hockey ◽  
Protective Capacity ◽  
Different Levels

scholarly journals Protective Capacity of Ice Hockey Helmets against Different Impact Events

2016 ◽  
Vol 44 (12) ◽  
pp. 3693-3704 ◽  
Author(s):  
J. Michio Clark ◽  
Andrew Post ◽  
T. Blaine Hoshizaki ◽  
Michael D. Gilchrist
Keyword(s):  
Ice Hockey ◽  
Protective Capacity ◽  
Impact Events

scholarly journals Protective capacity of an ice hockey goaltender helmet for three events associated with concussion

2017 ◽  
Vol 20 (12) ◽  
pp. 1299-1311 ◽  
Author(s):  
J. Michio Clark ◽  
T. Blaine Hoshizaki ◽  
Michael D. Gilchrist
Keyword(s):  
Ice Hockey ◽  
Protective Capacity

scholarly journals Leveling the Ice: The Discrepancy Between Male and Female Athletics at Boston College

Elements ◽  
2018 ◽  
Vol 13 (2) ◽  
Author(s):  
Isabelle Kennedy ◽  
Molly McCabe ◽  
Katelyn Rodgers
Keyword(s):  
Ice Hockey ◽  
Women's Sports ◽  
Male And Female ◽  
Boston College ◽  
Women’S Sports ◽  
University Support ◽  
Spectator Attendance ◽  
Levels Of Support ◽  
Different Levels

This paper explores multiple published articles regarding the societal assumption that women’s sports are less competitive and less engaging than men’s sports. Some articles, such as Women’s Sports Foundation (2010) and Carpenter & Acosta (2005),cite lack of funds and media visibility as to why women’s sports are not as highly regarded as men’s sports. Other articles, such as Messner (2000) and NWLC (2012), explain that the disproportion in coverage of men’s and women’s sports is based onsociety’s expectations of women and the assumption feminine“weaknesses” This paper examines the men’s and women’s ice hockey teams at Boston College and details the issues surrounding team schedules, fan attendance, university support, and media presence in an attempt to determine whether BC Women’s Ice Hockey receives different levels of support and investment from BC compared to the BC Men’s Hockey team, and whether this differential investment leads to a unique spectator experience that may explain the lack of spectator attendance at BC women’s hockey games.

scholarly journals Study of Differences in Motor Reactions and Performances in Professional Ice Hockey Players and not Experienced Participants Using Virtual Reality (VR) Technology

2021 ◽  
Author(s):  
Irina Polikanova ◽  
Anastasiya Yakushina ◽  
Sergey Leonov ◽  
Anna Kruchinina ◽  
Victor Chertopolokhov ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Head Movements ◽  
Ice Hockey ◽  
Training Experience ◽  
Hip Joints ◽  
Motor Responses ◽  
Hockey Players ◽  
Professional Hockey ◽  
Difficult Situations ◽  
Different Levels

The efficiency of performance in various sports has the development of certain specific skills at its core. In ice hockey, both the technical aspects (techniques, stance) and the cognitive ones (keeping attention on the puck, game strategy, etc.) are highly important. This study is aimed at the identification of specific features that determine the performance efficiency of professional hockey players. We used virtual reality (VR) to study the differences between professional ice hockey players and novices in terms of motor responses to the puck’s presentation on different levels of difficulty. The study involved 22 participants, 13 of them being professional ice hockey players (Mage=20±2.9; mean age of training experience М=14.18±3.8) and 9 being not experienced participants (Mage=20±1.4). The study showed that the stick response time of professional hockey players is significantly higher (0.98 ms vs 1.5 ms, p≤0.05) in more difficult situations close to a real game. Moreover, professionals proved to have more stable movement patterns of the knee and hip joints. They also make fewer head movements as a response to stimuli during all runs (0.66 vs 1.25, p≤0.05). Therefore, the results indicate specific spatial-temporal, technical and tactical, and energetic determinants, that ensure higher performance efficiency in hockey players

scholarly journals For ASTM F-08: Protective Capacity of Ice Hockey Player Helmets against Puck Impacts

2014 ◽  
pp. 196-207 ◽  
Author(s):  
P. Rousseau ◽  
T. B. Hoshizaki ◽  
M. D. Gilchrist
Keyword(s):  
Ice Hockey ◽  
Protective Capacity ◽  
Hockey Player

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

Immunoenzymatic demonstration of the simultaneous presence of transferrin, hemopexin and albumin in a same hepatocyte and their ultrastructural localization

1978 ◽  
Vol 36 (2) ◽  
pp. 88-89
Author(s):  
M. Kraemer ◽  
J. Foucrier ◽  
J. Vassy ◽  
M.T. Chalumeau
Keyword(s):  
Plasma Proteins ◽  
Rat Hepatocytes ◽  
Ultrastructural Localization ◽  
Carrier Proteins ◽  
Normal Cells ◽  
Adult Rat ◽  
Adult Rat Hepatocytes ◽  
Monospecific Antisera ◽  
Different Levels

Some authors using immunofluorescent techniques had already suggested that some hepatocytes are able to synthetize several plasma proteins. In vitro studies on normal cells or on cells issued of murine hepatomas raise the same conclusion. These works could be indications of an hepatocyte functionnal non-specialization, meanwhile the authors never give direct topographic proofs suitable with this hypothesis.The use of immunoenzymatic techniques after obtention of monospecific antisera had seemed to us useful to bring forward a better knowledge of this problem. We have studied three carrier proteins (transferrin = Tf, hemopexin = Hx, albumin = Alb) operating at different levels in iron metabolism by demonstrating and localizing the adult rat hepatocytes involved in their synthesis.Immunological, histological and ultrastructural methods have been described in a previous work.

Memory Processes, Aging, Cognitive Decline, and Neurodegenerative Diseases

2006 ◽  
Vol 11 (4) ◽  
pp. 304-311 ◽  
Author(s):  
Lars-Göran Nilsson
Keyword(s):  
Cognitive Impairment ◽  
Cognitive Decline ◽  
Neurodegenerative Disease ◽  
Genetic Markers ◽  
Brain Activity ◽  
Memory Performance ◽  
Modeling And Simulations ◽  
Aging And Health ◽  
Explained Variance ◽  
Different Levels

This paper presents four domains of markers that have been found to predict later cognitive impairment and neurodegenerative disease. These four domains are (1) data patterns of memory performance, (2) cardiovascular factors, (3) genetic markers, and (4) brain activity. The critical features of each domain are illustrated with data from the longitudinal Betula Study on memory, aging, and health ( Nilsson et al., 1997 ; Nilsson et al., 2004 ). Up to now, early signs regarding these domains have been examined one by one and it has been found that they are associated with later cognitive impairment and neurodegenerative disease. However, it was also found that each marker accounts for only a very small part of the total variance, implying that single markers should not be used as predictors for cognitive decline or neurodegenerative disease. It is discussed whether modeling and simulations should be used as tools to combine markers at different levels to increase the amount of explained variance.

Implications of Person Fluctuation for the Stability and Validity of Test Scores

Methodology ◽  
2006 ◽  
Vol 2 (4) ◽  
pp. 142-148 ◽  
Author(s):  
Pere J. Ferrando
Keyword(s):  
Item Response ◽  
Test Scores ◽  
Temporal Stability ◽  
Person Fit ◽  
Item Parameters ◽  
Individual Trait ◽  
The Stability ◽  
The Individual ◽  
Different Levels ◽  
Fluctuation Model

In the IRT person-fluctuation model, the individual trait levels fluctuate within a single test administration whereas the items have fixed locations. This article studies the relations between the person and item parameters of this model and two central properties of item and test scores: temporal stability and external validity. For temporal stability, formulas are derived for predicting and interpreting item response changes in a test-retest situation on the basis of the individual fluctuations. As for validity, formulas are derived for obtaining disattenuated estimates and for predicting changes in validity in groups with different levels of fluctuation. These latter formulas are related to previous research in the person-fit domain. The results obtained and the relations discussed are illustrated with an empirical example.

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