Relevant bibliographies by topics / Sprint Phases

Academic literature on the topic 'Sprint Phases'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Sprint Phases.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Sprint Phases"

1

Matzenbacher, Fernando, Bruno Natale Pasquarelli, Felipe Nunes Rabelo, Antônio Carlos Dourado, Julia Zoccolaro Durigan, Hélcio Gonçalves Rossi, and Luiz Cláudio Reeberg Stanganelli. "Adaptações nas capacidades físicas de atletas de futsal da categoria sub 18 no decorrer de uma temporada competitiva." Brazilian Journal of Kinanthropometry and Human Performance 18, no. 1 (March 16, 2016): 50. http://dx.doi.org/10.5007/1980-0037.2016v18n1p50.

Full text
Abstract:
DOI: http://dx.doi.org/10.5007/1980-0037.2016v18n1p50 The aim of this study was to verify and to analyze adaptations on physical and physiological variables of futsal athletes during the pre-competitive and competitive phases of a training macrocycle. The sample was composed of nine Under-18 futsal athletes who performed the following tests: vertical jump, 10 and 30-meter linear sprint, repeated sprint ability test, Yo-Yo intermittent recovery test level 1 and VO2máx. Based on the qualitative analysis of the change magnitude, it was possible to verify adaptations from training for the vertical jump test (certainly positive), 10-meter linear sprint (likely decrease), 30-meter linear sprint (irrelevant), repeated sprint ability test for best sprint (irrelevant), mean of sprints (likely decrease), fatigue index (likely decrease), YYIRI (likely increase), VO2máx (likely decrease) and speed of VO2máx (likely increase). Thus, it was possible to verify that training-induced adaptations were positive since athletes improved their performance for the most control tests for each physical capacities of futsal (vertical jumps, 10-meter linear sprint, and repeated agility sprint test for the mean of sprints and fatigue index and aerobic resistance. Therefore, data have shown that athletes improved their physical performance considering the characteristics of futsal during training throughout a macrocycle.
APA, Harvard, Vancouver, ISO, and other styles
2

Jones, Robyn, Ian Bezodis, and Andy Thompson. "Coaching Sprinting: Expert Coaches' Perception of Race Phases and Technical Constructs." International Journal of Sports Science & Coaching 4, no. 3 (September 2009): 385–96. http://dx.doi.org/10.1260/174795409789623964.

Full text
Abstract:
The general aim of this study was explore expert coaches' technical knowledge of sprint running. The first of two principal objectives related to discovering whether expert coaches divided a sprint race into distinct phases and, if so, which and how many phases. The second objective was to examine the good technique characteristics associated with each phase. Participants for the study comprised seven expert track and field sprint coaches. Findings indicated that the respondents broke sprinting down into three technical phases, the start, the pick-up/drive and the maintenance phase. Important constructs were associated with each phase, which both supported and conflicted with the limited literature available. The principal finding of this study, however, relates to the current dearth of knowledge about good sprint-running technique, an area which requires considerable further investigation before definitive lines of good practice can be confidently applied.
APA, Harvard, Vancouver, ISO, and other styles
3

Ntoumas, Nounos, Ioannidis, and Voutselas. "Acceleration and Maximum Running Phases in 60-m Sprint and Vertical Jump Performance." Proceedings 25, no. 1 (September 2, 2019): 21. http://dx.doi.org/10.3390/proceedings2019025021.

Full text
Abstract:
AIM: The purpose of the present study was to investigate the correlation between acceleration and maximum running phase in 60-m sprint and vertical jump performance. Furthermore, to investigate the factors that affect the acceleration phase, maximum running phase, and overall 60-m sprint performance. MATERIAL & METHOD: Participants were 25 young amateur athletes, aged 18 ± 1 years, with body mass 64.64 ± 13.39 kg and body height 1.71 ± 0.11 m. We examined the correlation between the acceleration phase (0–30 m) and maximum running phase (30–60 m) and 60-m sprint performance, measured with photocells (Optojump), and vertical jump performance (take-off velocity, jump height, maximal velocity, maximal power), measured with a force plate (Bertec). Pearson correlation was used to examine the correlation between the forementioned parameters (SPSS, v. 21). RESULTS: There was a correlation between jump height and 60-m sprint performance (r = −0.713, p < 0.001), maximum running phase (r = −0.512, p = 0.15), and a weak correlation with acceleration phase (r = −0.495, p = 0.19). There was a correlation between take-off velocity and 60-m sprint performance (r = −0.732, p < 0.001), maximum running phase (r = −0.553, p = 0.08), and a weak correlation with acceleration phase (r = −0.472, p = 0.27). There was a weak correlation between maximal velocity, acceleration phase (r = 0.439, p = 0.41), and 60-m sprint performance (r = 0.438, p = 0.42). There was a correlation between maximal power and 60-m sprint performance (r = −0.739, p < 0.001), acceleration phase (p = −0.635, p = 0.02), and a weak correlation with maximum running phase (r = −0.437, p = 0.042). There was a correlation between 60-m sprint performance and maximum running phase (r = 0.792, p < 0.001) and acceleration phase (r = 0.596, p = 0.03). Finally, there was a correlation between body height and 60-m sprint performance (r = −0.738, p = 0.02) and maximum running phase (r = −0.666, p = 0.07). CONCLUSIONS: According to our results, 60-m sprint performance was highly correlated with body height, maximum running phase and all the vertical jump parameters (explosive power), except for maximal power, which had a high correlation with the acceleration phase (sprint acceleration).
APA, Harvard, Vancouver, ISO, and other styles
4

Sandbakk, Øyvind, Matt Spencer, Gertjan Ettema, Silvana Bucher Sandbakk, Knut Skovereng, and Boye Welde. "The Physiology and Biomechanics of Upper-Body Repeated Sprints in Ice Sledge Hockey." International Journal of Sports Physiology and Performance 9, no. 1 (January 2014): 77–84. http://dx.doi.org/10.1123/ijspp.2012-0355.

Full text
Abstract:
Purpose:To investigate performance and the associated physiological and biomechanical responses during upper-body repeated-sprint work.Methods:Twelve male ice sledge hockey players from the Norwegian national team performed eight 30-m sprints with start every 30 s and an active recovery between sprints. Time was captured every 10 m by photocells, cycle length and rate were determined by video analyses, and heart rate and blood lactate concentration were measured by conventional methods.Results:The percentage sprint decrement was 7% over the 8 trials, with significant reductions in performance from the previous trial already on the second trial (all P < .05). Furthermore, cycle rate was reduced by 9% over the 8 trials (P < .05). Similar changes in performance and kinematic patterns were evident for all 10-m phases of the sprints. Heart rate gradually increased to 94% of maximal (178 ± 10 beats/min) over the 8 trials, and the mean reduction in heart rate was 7 ± 2 beats/min during the 22–24 s of active recovery for all trials (all P < .05). The blood lactate concentration increased to the athletes’ maximal levels over the 8 sprints (P < .05).Conclusions:This is the first study to investigate performance, physiological, and biomechanical aspects of self-propelled upperbody repeated-sprint work. The observed sprint decrement over the 8 trials was associated with reductions in cycle rates and high physiological demands. However, no kinematic and physiological characteristics were significantly correlated to repeated-sprint ability or the sprint decrement.
APA, Harvard, Vancouver, ISO, and other styles
5

Petrakis, Dimitrios, Eleni Bassa, Anastasia Papavasileiou, Anthi Xenofondos, and Dimitrios A. Patikas. "Backward Running: Acute Effects on Sprint Performance in Preadolescent Boys." Sports 8, no. 4 (April 23, 2020): 55. http://dx.doi.org/10.3390/sports8040055.

Full text
Abstract:
The aim of this study was to examine the acute effect of backward running (BwR) during warm-up on a 20-m sprint of boys’ performance, compared to forward running (FwR). Fourteen recreationally active preadolescent boys (aged 12.5 ± 0.5 years) were examined in 3 protocols: warm-up (control condition), warm-up with 3 × 10 m additional BwR sprints and warm-up with 3 × 10 m additional FwR sprints. Participants were evaluated 4 minutes after each protocol on a 20-m sprint and intermediate distances, as well as the rate of perceived exertion (RPE). Sprint speed across 10-20 m was significantly higher for the BwR warm-up compared to the regular warm-up (p < 0.05) and a significantly higher RPE after the BwR and FwR protocols compared to the control condition was recorded (p < 0.05). No significant difference was detected across the distances 0–5, 5–10, 0–10 and 0–20 m. Although adding 3 × 10-m sprints of BwR or FwR after the warm-up did not enhance performance in a 20 m sprint of preadolescent boys, the positive effect of BwR across 10–20 m distance suggests that BwR could be an alternative means for enhancing performance for certain phases of a sprint for this age. However, preadolescent boys’ response to different sprint conditioning exercise stimuli and the optimization of rest time to maximize performance remain to be determined.
APA, Harvard, Vancouver, ISO, and other styles
6

García-Pinillos, Felipe, Pascual Bujalance-Moreno, Carlos Lago-Fuentes, Santiago A. Ruiz-Alias, Irma Domínguez-Azpíroz, Marcos Mecías-Calvo, and Rodrigo Ramirez-Campillo. "Effects of the Menstrual Cycle on Jumping, Sprinting and Force-Velocity Profiling in Resistance-Trained Women: A Preliminary Study." International Journal of Environmental Research and Public Health 18, no. 9 (April 30, 2021): 4830. http://dx.doi.org/10.3390/ijerph18094830.

Full text
Abstract:
The aim of this study was to examine the effects of the menstrual cycle on vertical jumping, sprint performance and force-velocity profiling in resistance-trained women. A group of resistance-trained eumenorrheic women (n = 9) were tested in three phases over the menstrual cycle: bleeding phase, follicular phase, and luteal phase (i.e., days 1–3, 7–10, and 19–21 of the cycle, respectively). Each testing phase consisted of a battery of jumping tests (i.e., squat jump [SJ], countermovement jump [CMJ], drop jump from a 30 cm box [DJ30], and the reactive strength index) and 30 m sprint running test. Two different applications for smartphone (My Jump 2 and My Sprint) were used to record the jumping and sprinting trials, respectively, at high speed (240 fps). The repeated measures ANOVA reported no significant differences (p ≥ 0.05, ES < 0.25) in CMJ, DJ30, reactive strength index and sprint times between the different phases of the menstrual cycle. A greater SJ height performance was observed during the follicular phase compared to the bleeding phase (p = 0.033, ES = −0.22). No differences (p ≥ 0.05, ES < 0.45) were found in the CMJ and sprint force-velocity profile over the different phases of the menstrual cycle. Vertical jump, sprint performance and the force-velocity profiling remain constant in trained women, regardless of the phase of the menstrual cycle.
APA, Harvard, Vancouver, ISO, and other styles
7

Ahmed, Bilal Ali. "Special Training According to Power Law and Its Effect on Some Kinetical Indicators and Achievement in 100m Sprint Under 20 Years Old." Journal of Physical Education 32, no. 3 (September 28, 2020): 86–92. http://dx.doi.org/10.37359/jope.v32(3)2020.1023.

Full text
Abstract:
100m sprints is characterized by many technical artistic phases starting from the launch to acceleration and maintaining a speed that requires a great level of legs’ power to change speed positively. All these phases require special training thus the researcher aimed at designing special training according to power law to specify training intensity using distances and times. The importance of the research lies in designing training according to power law as well as identifying the effect of this training on the level of 100m sprint achievement. Many variables were measured including pushing time during lunch; performance power average during sprinting using dynafoot for measuring legs’ power and 100m performance time was also measured. The training was applied on 10 sprinters from Athletic clubs in Baghdad that consisted of (24) training sessions during the preparation phase. The researcher concluded a great development in the level of power during sprinting as well as an increase in the level of power push during lunch in 100m sprinter and development in 100m sprint achievement.
APA, Harvard, Vancouver, ISO, and other styles
8

Nagahara, Ryu, Mirai Mizutani, Akifumi Matsuo, Hiroaki Kanehisa, and Tetsuo Fukunaga. "Association of Sprint Performance With Ground Reaction Forces During Acceleration and Maximal Speed Phases in a Single Sprint." Journal of Applied Biomechanics 34, no. 2 (April 2018): 104–10. http://dx.doi.org/10.1123/jab.2016-0356.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Bezodis, Ian N., David G. Kerwin, Stephen-Mark Cooper, and Aki I. T. Salo. "Sprint Running Performance and Technique Changes in Athletes During Periodized Training: An Elite Training Group Case Study." International Journal of Sports Physiology and Performance 13, no. 6 (July 1, 2018): 755–62. http://dx.doi.org/10.1123/ijspp.2017-0378.

Full text
Abstract:
Purpose: To understand how training periodization influences sprint performance and key step characteristics over an extended training period in an elite sprint training group. Methods: Four sprinters were studied during 5 mo of training. Step velocities, step lengths, and step frequencies were measured from video of the maximum velocity phase of training sprints. Bootstrapped mean values were calculated for each athlete for each session, and 139 within-athlete, between-sessions comparisons were made with a repeated-measures analysis of variance. Results: As training progressed, a link in the changes in velocity and step frequency was maintained. There were 71 between-sessions comparisons with a change in step velocity yielding at least a large effect size (>1.2), of which 73% had a correspondingly large change in step frequency in the same direction. Within-athlete mean session step length remained relatively constant throughout. Reductions in step velocity and frequency occurred during training phases of high-volume lifting and running, with subsequent increases in step velocity and frequency happening during phases of low-volume lifting and high-intensity sprint work. Conclusions: The importance of step frequency over step length to the changes in performance within a training year was clearly evident for the sprinters studied. Understanding the magnitudes and timings of these changes in relation to the training program is important for coaches and athletes. The underpinning neuromuscular mechanisms require further investigation but are likely explained by an increase in force-producing capability followed by an increase in the ability to produce that force rapidly.
APA, Harvard, Vancouver, ISO, and other styles
10

Forster, James W. D., Aaron M. Uthoff, Michael C. Rumpf, and John B. Cronin. "Training to Improve Pro-Agility Performance: A Systematic Review." Journal of Human Kinetics 85, no. 1 (December 21, 2022): 35–51. http://dx.doi.org/10.2478/hukin-2022-0108.

Full text
Abstract:
Abstract Effective directional change in sport is imperative to success in key game situations. Change of direction (COD) ability is underpinned by various athletic qualities which can be developed through specific and non-specific training methods. This review examined the effect of specific and non-specific training methods on pro-agility performance, by analysing the intervention type and resulting magnitude of training effects on pro-agility shuttle performance. A total of 20 studies were included for review. Data from 638 subjects and 29 intervention groups involving seven different training methods were extracted and analysed in relation to training method classification and primary outcome measures. Interventions involving sprint training, plyometric training, resistance training, and combined resistance, plyometric, and sprint training were found to produce statistically significant positive change on pro-agility performance per session (p < 0.05). Sprint training (0.108 ES), plyometric training (0.092 ES), resistance training (0.087 ES), and combined resistance, plyometric, and sprint training (0.078 ES) methods were found to have the highest per session training effect. While total time is the typical unit of measure for this test, different types of training may lead to preferential improvements in either acceleration, deceleration, or COD phases of the pro-agility shuttle. Specifically, resisted or inclined sprinting may develop the linear acceleration phases, unilateral resistance training may promote increased strength to overcome the imposed forces during the deceleration and COD phases, multiplanar plyometrics can help enhance stretch-shortening cycle capabilities across different force vectors, and a combination of two or more of these methods may enable simultaneous development of each of these qualities.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Sprint Phases"

1

von, Lieres und Wilkau Hans Christian. "Understanding biomechanical differences in technique between phases of a sprint." Thesis, Cardiff Metropolitan University, 2017. http://hdl.handle.net/10369/9564.

Full text
Abstract:
Sprinting requires the rapid development of velocity while technique changes across multiple steps. Research Themes (Phase analysis, Technique analysis and Induced acceleration analysis) were formulated to investigate and understand the biomechanical differences in technique between the initial acceleration, transition and maximal velocity phases of a sprint. Theme 1 (Phase analysis) revealed relatively large changes in touchdown variables (e.g. centre of mass height, touchdown distances, shank angles) during the initial acceleration phase. This likely reflects an increasing need to generate larger vertical forces early during stance as a sprint progresses. At toe-off, smaller yet progressive changes in variables (e.g. trunk angles and centre of mass height) across the initial acceleration and transition phases reflect a constraint determining decreases in propulsive forces during a sprint. Theme 2 (Technique analysis) revealed a trend linking smaller horizontal foot velocities and touchdown distances with smaller braking impulses during the transition and maximal velocity phases. Furthermore, moderate to large increases in negative work by the ankle plantar flexors and knee extensors suggests an increased contribution to absorb forces at those joints and maintain the height of the centre of mass as a sprint progresses. Finally, theme 3 (Induced acceleration analysis) revealed that the braking impulses relative to body mass (expressed in m·s-1) due to the accelerations at contact point, which largely resulted from the foot being decelerated at touchdown, increased from -0.01 ± 0.01 m·s-1 to -0.08 ± 0.02 m·s-1 between steps three to 19 of a sprint. The ankle moment provided the largest contributions to centre of mass acceleration throughout stance with the changing orientation of the ground reaction force vector ultimately determined by the increasing foot, shank and trunk angles as the sprint progressed. This thesis developed the conceptual understanding of the technical differences between different phases of sprinting. It will contribute to the development and evaluation of sprinting technical models associated with different phases of the event and provide a greater understanding of key contributors to performance. As a sprint progresses, sprinters should emphasise the development of the leg mechanics during the terminal swing and early stance phases to ensure step-to-step changes in braking impulses are managed.
APA, Harvard, Vancouver, ISO, and other styles
2

Witmer, Chad A. "Effects of acute exposure to moderate hypoxia during different phases of repeated-sprint cycling on fatigue and anaerobic power reserve." Diss., Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/135073.

Full text
Abstract:
Kinesiology
Ph.D.
The purpose of this study was to investigate the effects of acute moderate hypoxia (14.5% inspired oxygen fraction) on the magnitude of fatigue development during the different phases (work, recovery, and both) of a repeated-sprint test (10 x 6-s sprints interspersed with 30-s recovery) in healthy, trained males. This study also sought to investigate the relationship between anaerobic power reserve and fatigue during the aforementioned repeated-sprint test. Fourteen exercise-trained males completed four trials of the repeated-sprint test under each of the following conditions: (a) normoxia (20.93% inspired oxygen fraction), (b) acute hypoxia during the work intervals only, (c) acute hypoxia during the recovery intervals only, and (d) acute hypoxia during both the work and recovery intervals. The order of the experimental conditions was systematically balanced. Fatigue scores were not different between experimental conditions, despite the fact that arterial oxygen saturation values from the acute hypoxia during recovery condition and the acute hypoxia during both work and recovery condition differed significantly from the normoxia and acute hypoxia during work intervals only conditions (p < .001). There was no relationship between anaerobic power reserve and fatigue in any experimental condition. The results of the present study indicate that although the participants experienced different levels of hypoxia during the experimental trials, the degree of hypoxia was insufficient to alter mechanical performance during a repeated-sprint test. The lack of an effect on mechanical performance does not appear to be influenced by an individual's anaerobic power reserve. It may be inferred that the degree of hypoxia employed was neither severe enough as to impair levels of muscle oxygenation beyond what was experienced in normoxia, nor as to induce further fatigue related to central mechanisms.
Temple University--Theses
APA, Harvard, Vancouver, ISO, and other styles
3

Miller, James. "Changes in Sprint Kinematics Between Phase Potentiation and Linear PRogressive Models of Resistance Training." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etd/3309.

Full text
Abstract:
Fifteen well-trained males, mid-thigh pull peak force (IPF 4403.61 ± 664.69N) and isometric peak force allometrically scaled (IPFa 226.04 ± 25.81) were assigned to two groups: repetition maximum training (RM) and relative intensity training (RI) for a twelve-week training intervention. The main effect of time showed a statistically significant difference in mean sprint performance and IPFa at the different time points (p < 0.001). There was a larger magnitude of within-subject effect with respect to sprint performance pre – post with the RI group (ES = 1.06, 7.19%) as compared to the RM group (ES = 0.567, 4.23%, p < 0.001), as well as a larger magnitude of within-subject effect with respect to IPFa pre – post with the RI group (ES = 0.426, 7.51%) as compared to the RM group (ES = 0.270, 13.29%). Furthermore, there was a non-statistically significant, moderate between-group difference in the change in IPFa from pre-post in favor of the RI group (ES=.75), and a large between-group difference in the change in sprint performance pre-post in favor of the RI group (ES=1.50). Results lead investigators to suggest the utilization of RI training tactics for the development of sprint performance when minimal sprint skill training is available.
APA, Harvard, Vancouver, ISO, and other styles
4

Tsampoukos, Antonis. "Effects of endurance training on performance and metabolism during a repeated treadmill sprint in females." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/14222.

Full text
Abstract:
A small number of previous cross-sectional studies have examined the relationship between endurance training status on recovery of performance and metabolites from sprinting. However, no longitudinal studies have been undertaken. In addition, there is a dearth of information on female subjects and on running exercise which prompted the need, in the present thesis, to address the effect of menstrual cycle phase on performance and metabolic responses during a repeated sprint run. Thus, the overall purpose of the present thesis was to examine the effect of short-term endurance training on a repeated sprint in female subjects. A number of methodological studies (for which 25 subjects volunteered) were undertaken as preparation for the main experimental chapters of the thesis (Chapter 3). The first methodological study examined the reliability of performance during a 30-s sprint on the non-motorised treadmill. Performance was reproducible as indicated by the 95% limits of agreement for PPO (5 ± 42 W) and by the ratio limits of agreement for MPO (1.01 */÷1.06) during the 30 s sprint. In the second methodological study it was found that capillary lactate concentrations were significantly higher than venous blood lactate after a 30 s sprint (P < 0.05). The third methodological study revealed that a repeated sprint run caused an additional plasma volume loss when compared with the loss caused by a change in posture alone (12.7 % vs 7.5 % for sprint and posture change, respectively, P < 0.05). Finally, it seems that prolonged freezing (up to 13 months) does not have a detrimental influence on whole blood lactate concentration, but repeated defrosting may result in errors in the determination of blood lactate at high lactate concentrations (methodological study 4). The first mam experiment examined the effects of menstrual cycle phase on performance and metabolic responses during a repeated sprint run (2x30 s, with a 2 min passive recovery) in 8 volunteers (chapter 4). Performance was unaltered during the follicular, mid-cycle and luteal phase of the menstrual cycle as reflected by PPO (461 ± 51 and 395 ± 48, 443 ± 43 and 359 ± 44, 449 ± 52 and 397 ± 48 W, for the first and second sprint, during the follicular, mid-cycle and luteal phase, respectively, P > 0.05) and MPO (302 ± 41 and 252 ± 29, 298 ± 37 and 248 ± 29, 298 ± 39 and 252 ± 35 W, for the first and second sprint, at follicular, mid-cycle and luteal phases, respectively, P > 0.05). Similarly, blood metabolic responses were unaffected by menstrual cycle phase as reflected by the unchanged metabolic profile of blood lactate, plasma' ammonia, blood pH and % changes in plasma volume across menstrual cycle. These results suggest that the hormonal fluctuations of 17-,β-estradiol (estradiol) and progesterone, due to menstrual cycle phase, have no effect on repeated sprint performance and possibly on the metabolic responses as reflected by the blood metabolic responses. The second main experiment examined the effects of short-term endurance training on power output recovery and metabolic responses to a repeated sprint run (2x30 s with a 2 min passive recovery) (chapter 5, n = 16). Six weeks of endurance training resulted in a 3% increase (P < 0.05) in V̇ 0₂ max (from 48.7 ± 4.4 before training to 50.17 ± 5.1 mL.kg⁻¹·min⁻¹ after training) in the training group (n = 8) in comparison with 1.9% decrease (from 50.4 ± 1.3 to 49.4 ± 1.2 mL.kg⁻¹·min⁻¹ post-trial) in the control group (n = 7). In addition, % V̇ 0₂ max @ 4 mmol·L⁻¹ [the relative intensity (% V̇ 0₂ max) corresponding to blood lactate concentration of 4 mmol·L⁻¹] was 3% higher (from 82 to 84%) in the training group as compared with the 1% decrease in the control group (from 81 to 80%) (P < 0.05). These endurance adaptations were accompanied by a 7% improvement in MPO recovery (in the second of two 30 s sprints) in the training group in comparison with 2% increases in the control group after training (P < 0.05). Metabolic responses to sprints were unaltered after training, but there was a tendency for higher pH immediately after sprint 1 in the training group in comparison with the control group (7.12 ± 0.07 vs 7.19 ± 0.06 and 7.09 ± 0.07 vs 7.10 ± 0.06, before and after training, in the training and control group, respectively, P = 0.082). These findings suggest that endurance training can be beneficial in terms of quicker recovery of performance during a repeated sprint run. The third main experiment examined the effects of endurance training on performance recovery and muscle metabolites (chapter 6, n=14). Endurance training resulted in a tendency towards lower blood lactate concentrations during sub-maximal exercise in the training group in comparison with the control group (P = 0.063) whilst time to exhaustion for the incremental V̇ 0₂ max test was 12.7% longer for the training group in comparison with 4.1% decrease in the control group (P = 0.095). These endurance training adaptations were accompanied by a 7% improvement (77 ± 7 to 84 ± 5 W) in MPO recovery in the second of two 30 s sprints in the training group while in the control group MPO recovery improved by just 2% (87 ± 8 to 89 ± 8%) (P < 0.05). In addition, similar increases in the recovery of peak speed (3.4% vs 1%, P < 0.05), and mean speed (5% vs 0.9%, P < 0.05) were also evident in the training in comparison with control group. Endurance training resulted in 5.6% decrease in ATP provision from PCr degradation ≈ 14 s post-sprint 1 (P < 0.05) while glycogen degradation was 10% lower (P = 0.063). The latter alterations, in turn, resulted in a tendency towards less reliance on anaerobic energy resources for energy supply after training in the training group (11%, P = 0.098). These results corroborate the findings of chapter 5, but it is still unclear which physiological mechanisms were instrumental in enhancing recovery of performance. It is possible that a faster initial PCr resynthesis or an improved mechanical efficiency or an increased reliance on aerobic metabolism, independently, all together, or in any combination, could have contributed to these improvements in performance recovery. In conclusion the present thesis has shown that: the non-motorised treadmill is a reliable tool for the examination of sprint running performance in the laboratory; that performance and metabolic responses during a repeated sprint run are unaffected by menstrual cycle phase and; that endurance training enhances the recovery of power in female subjects during a repeated sprint run of 2 x 30 s duration with a 2 min passive recovery. The mechanisms underlying the performance improvement following endurance training are unknown, but it is possible that faster PCr resynthesis during the initial phase of recovery (< 1 min) after the sprint is the dominant factor, while greater reliance on aerobic metabolism and improved mechanical efficiency can not be excluded.
APA, Harvard, Vancouver, ISO, and other styles
5

Habib, Perez Olinda D. "An Analysis of Infant Bouncing at Different Spring Frequencies." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19897.

Full text
Abstract:
Infants explore environments through repetitive movements which are constrained or facilitated by the environmental context. The current studies analyzed how typically developing infants bounced in four environments that differed by system natural frequency. Four pre-walking infants (age 9.7 months ±1.8) were placed in four spring conditions with natural spring frequencies of 0.9, 1.15, 1.27 and 1.56 Hz. All infants bounced above the natural spring frequency in all conditions suggesting that they do not solely behave like a mass-spring system. Two patterns of bouncing adaptations were identified. Three infants regulated bounce frequency, while one infant regulated the percentage of time on the ground. When infants matched their bounce frequency to the natural frequency, trunk vertical displacement and joint ranges of motion decreased across conditions and demonstrated a shift from non-spring like to circular spring-like phase planes. Moderate to high correlations were found for inter- and intra-limb coordination. Conversely, when an infant regulated time on the ground, trunk vertical displacement and joint ranges of motion remained the same across conditions and inter- and intra-limb correlations were low to moderate. Phase planes remained circular spring-like for this infant. Asymmetrical loading patterns and decreasing vertical ground reaction forces were found in all infants suggesting that a timing component is always regulated. The difference in bouncing pattern may be indicative of different bouncing skill level.
APA, Harvard, Vancouver, ISO, and other styles
6

Stepulaitienė, Inga. "Development of sour cherry generative organs and formation of spring frost resistance." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2013~D_20131218_133439-66035.

Full text
Abstract:
Sour cherry (Prunus cerasus L. (sin. Cerasus vulgaris Mill., Prunus vulgaris Schur)) is widely grown stonefruit tree in Lithuania. Productivity of sour cherry orchard depends on many tightly related factors. It's know that negative temperature and spring frosts are important factors determinating plant productivity. These factors must be considered in plant breeding. Risks of extreme temperatures, humidity deficiency and spring frosts increases due to climate change. Plant reaction to climate change depends on plant species, cultivar and on biotic or abiotic factors. Spring starts earlier and suddenly during past years, thus vegetation of cherries starts earlier. However, probability of plant damage to spring frosts increases due to earlier vegetation, because plants are susceptible to negative temperatures due to loss of the predictive and consequential (secondary) dormancy. The aim of the research was to evaluate DNA polymorphism of sour cherry cultivars with different resistance to spring frosts, to characterize nature of phenological phase changes, to evaluate biochemical characteristics of sour cherry resistance to spring frosts formation by analysis of changes in carbohydrate amount and composition in generative organs and fruit ovaries at different phenological phases, and to evaluate changes in gene expression levels of galactinol synthase and raffinose synthase during flower development. It was established, that specific rhythm of phenological development is... [to full text]
Paprastoji vyšnia (Prunus cerasus L. (sin. Cerasus vulgaris Mill., Prunus vulgaris Schur)) yra plačiai auginamas kaulavaisinis augalas Lietuvoje. Vyšnių sodo produktyvumas priklauso nuo daugelio tarpusavyje susijusių veiksnių. Oro temperatūra yra vienas svarbiausių vyšnių paplitimą ir jų derlių lemiantis veiksnys. Žinoma, kad neigiamos temperatūros ir pavasario šalnos yra svarbus veiksnys, į kurį reikia atsižvelgti vykdant augalų selekciją. Keičiantis klimatui, didėja ekstremalių temperatūrų ir drėgmės deficito pavojus bei pavasario šalnų rizika (Augspurger, 2013). Augalų reakcija į klimato kaitos pokyčius priklauso nuo augalo rūšies ir veislės bei abiotinių ir biotinių veiksnių. Pastaraisiais metais pavasaris ateina greičiau ir staigiai. Tai paveikia vyšnias – jų vegetacija prasideda anksčiau. Anksti pradėjus vegetuoti išauga tikimybė, kad augalus pažeis pavasario šalnos. Lietuvoje nuostolių padaro vėlyvos pavasario šalnos, kurių metu pažeidžiami žiedai ir vaisių užuomazgos. Tuo metu augalai jau būna išėję iš būtinosios ir priverstinės ramybės ir jautrūs neigiamoms temperatūroms. Tyrimų tikslas buvo įvertinti skirtingo atsparumo šalnoms vyšnios veislių DNR polimorfizmą, fenologinių tarpsnių kaitos pobūdį, atskleisti paprastosios vyšnios atsparumo pavasario šalnoms formavimosi biochemines ypatybes ištiriant bendro angliavandenių kiekio ir jų sudėties kitimą skirtinguose fenologiniuose tarpsniuose esančių augalų generatyviniuose organuose ir vaisių užuomazgose, nustatyti... [toliau žr. visą tekstą]
APA, Harvard, Vancouver, ISO, and other styles
7

Castonguay, Samuel. "Structural Evolution of the Virgin Spring Phase of the Amargosa Chaos, Death Valley, California, USA." Thesis, University of Oregon, 2013. http://hdl.handle.net/1794/13418.

Full text
Abstract:
The Amargosa Chaos and Fault of Death Valley are complex features that play important roles in various tectonic models. Some recent models claim the fault is a regional detachment accommodating 80 km of NW-directed transport that produced the Chaos in its hangingwall. I offer an alternative interpretation: the chaos is a product of multiphase deformation that likely spanned the late Mesozoic and Cenozoic. The Amargosa Fault represents just one of six deformation events. The accompanying map (supplemental file) shows the cross-cutting relationships among fault populations: (D1) 25% north-northwest directed shortening across an imbricate thrust and tight fold system; (D2) E-SE extension on five normal faults; (D3) extension-related folding, which folded the D2 faults; (D4) normal-oblique slip on the Amargosa Fault; (D5) E-W extension on domino faults; (D6) extension on the Black Mountains Frontal Fault. The D2 faults, not the Amargosa, created the enigmatic attenuation observed in the Chaos.
APA, Harvard, Vancouver, ISO, and other styles
8

Smith, Brice Christopher 1976. "Geometric and elastic properties and mechanical phase separation phenomena in self-assembling mesoscopic helical springs." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29610.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2003.
Includes bibliographical references (p. 279-300).
Helical ribbons with pitch angles of either 11⁰ or 54⁰ self-assemble in a wide variety of quaternary surfactant-phospholipid/fatty acid-sterol-water systems. In all of the systems studied, the thermodynamically stable state for the sterol is plate like mono-hydrate crystals. However, the sterol is typically found to pass through a serious of metastable intermediates from filaments to helical ribbons to tubules before reaching the stable crystalline state. In the present work, we chose to focus on helical ribbons formed in the Chemically Defined Lipid Concentrate (CDLC) system. These helices typically have radii on the order of a few to a few tens of microns and lengths on the order of hundreds of microns. By tethering to these mesoscopic helical ribbons using Devcon 5-Minute Epoxy®, we have been able to elastically deform them, and thus examine their response to uniaxial tension. For small deformations, the low pitch helices behave like linear elastic springs with a spring constant for a typical example measured to be (4.80 +/- 0.77) x 10-6 N/m. From the observed spread in helix dimension, our theory predicts a corresponding range of spring constants for the structures of 10-7 to 10-4 N/m allowing, in principle, a great range of forces to be examined. Under larger tensions, both low and high pitch helices have been observed to reversibly separate into a straight domain with a pitch angle of 90Ê» and a helical domain with a pitch angle of (16.5 +/1 1.3)⁰ for the low pitch or (59.6 +/- 1.7)⁰ for the high pitch. Using a newly developed continuum elastic free energy model, we have shown that this phenomena can be understood as a mechanical phase transition of first order.
(cont.) From this analysis, we have also been able to determine all of the parameters within our model, and to show that it is capable of self-consistently and quantitatively explaining all of the observed properties of these self-assembled helices.
by Brice Christopher Smith.
Ph.D.
APA, Harvard, Vancouver, ISO, and other styles
9

Alizadeh, Shahab [Verfasser], and Mattes Klaus [Akademischer Betreuer]. "Comparing selected kinematic parameters of the late swing phase during a sprint, isokinetic strength, and flexibility in male soccer players with and without anterior pelvic tilt / Shahab Alizadeh ; Betreuer: Mattes Klaus." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1183262361/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Parikka, Kaarle Joonas. "Exploration des communautés virales thermophiles dans les écosystèmes chauds des terres australes et antarctiques françaises." Thesis, Brest, 2013. http://www.theses.fr/2013BRES0066/document.

Full text
Abstract:
Les virus peuvent être retrouvés dans tous les écosystèmes où de la vie est présente. Ils constituent l’entité biologique la plus abondante de la biosphère. Si de nombreuses données sont disponibles sur l’abondance et la dynamique virale dans les écosystèmes aquatiques tempérés, peu d’études ont été menées sur ces aspects dans les milieux extrêmes, dont les sources hydrothermales. Dans l’étude présentée dans ce manuscrit, les communautés procaryotiques et virales des sources hydrothermales des Terres australes et antarctiques françaises (TAAF) ont été explorées. Dans un premier temps, les cellules procaryotiques et les particules de type viral (VLP) ont été dénombrées dans plusieurs sources chaudes terrestres et marines côtières. L’abondance microbienne et virale est de l’ordre de 105 - 106 particules/ml dans les deux types de sources avec des rapports VLP/procaryotes (VPR) qui sont généralement faibles, concordant ainsi avec rares les données disponibles actuellement dans la littérature. Dans un second temps, la diversité morphologique des VLP a été analysée par observation au microscope électronique à transmission. La présence de VLP de morphologies différentes a pu être constatée dans quelques échantillons bruts, mais également dans des cultures d’enrichissement, où elles étaient associées à des Thermococcales et des Thermotogales. Finalement, quelques souches isolées de ces échantillons ont été criblées pour la présence de virus aboutissant à la description d’un nouveau bactériovirus tempéré associé à une bactérie thermophile Geobacillus. L’effet d’un choc osmotique en présence de NaCl et l’effet d’un stress anoxique sur la production virale ont également été étudiés. La caractérisation du virus GTV1 a ensuite été entamée. Il appartient à la famille des Myoviridae et a un génome composé d’ADN double brin de 38841 pb, composé de 71 ORF prédits. Enfin, l’étude de la diversité microbienne a permis de décrire une nouvelle espèce bactérienne hautement thermophile, Calditerricola clavaformis sp.nov
Viruses thrive in all types of ecosystems where life is found. They represent the most abundant biological entity of our biosphere. Though several studies have been conducted on viral abundance and dynamics in mesophilic aquatic ecosystems, these aspects remain largely unexplored in extremophilic environments, such as hot springs. In this study, prokaryotic and associated viral communities of the French Southern and Antarctic Lands hot springs were explored. First, prokaryotic cells and Virus-like particles (VLP) were enumerated in several terrestrial and inshore hot springs. The results reveal an abundance of 105 - 106 particles/ml in both types of hot springs studied. The virus-to-prokaryote ratios (VPR) were generally low, confirming thus actual knowledge in these types of ecosystems. The morphological diversity of VLP was then studied in raw samples as well as in enrichment cultures containing Thermococcales and Thermotogales. Several isolates obtained from these samples were then screened for viral particles which led to the discovery and description of a temperate phage (GTV1) of a thermophilic bacterium belonging to the genus Geobacillus. The effect of NaCl and anoxic stress on the viral production was studied. The genomic characterization of the GTV1 was started and revealed a 38441 bp genome with 71 predicted ORF. Finally, microbial diversity studies led also to the discovery of a new extremely thermophilic bacterium, Calditerricola clavaformis sp.nov
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Sprint Phases"

1

Callwood, June. Twelve weeks in spring. Toronto, Ont: Lester & Orpen Dennys, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Callwood, June. Twelve weeks in spring. Toronto: Lester & Orpen Dennys, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Trinkley, Michael. An archaeological survey of the Phase 1 Spring Island Development, Beaufort County, South Carolina. Columbia, S.C: Chicora Foundation, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Symposium D on Preparation and Properties of Metastable Alloys (1988 Strasbourg, France). Metastable alloys: Preparation and properties : proceedings of Symposium D on Preparation and Properties of Metastable Alloys of the 1988 E-MRS Spring Conference, Strasbourg, France, 31 May-2 June, 1988. Amsterdam: North-Holland, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Lieberman, Davine M. Pre- and post-operational effects of a temperature control device on physical, chemical, and biological attributes of Shasta Lake, California: Phase 1, spring 1995 through fall 1997. [Denver, Colo.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Symposium C on Ion Beam, Plasma, Laser, and Thermally-Stimulated Deposition Processes (1993 Strasbourg, France). Stimulated deposition processes and materials aspects of ion beam synthesis: Proceedings of Symposium C on Ion Beam, Plasma, Laser, and Thermally-Stimulated Deposition Processes and Symposium G on Materials Aspects of Ion Beam Synthesis: Phase Formation and Modification of the 1993 E-MRS Spring Conference, Strasbourg, France, May 4-7, 1993. Amsterdam: North-Holland, 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Wohlbier, Thomas. Metallic Glasses and Their Composites. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901014.

Full text
Abstract:
Metallic glasses and their crystal/glass composites find ever more applications in such fields as mini transformers, microelectromechanical devices, pressure sensors, precision surgical instruments, biological implants and sportive goods (springs, diaphragms, membranes, knife blades, electromagnetic wave shields, optical mirrors, power inductors, Coriolis flow meters, etc.). The book reviews recent research and suggests future developments, e.g. in the area of dual-phase composite/hybrid materials.
APA, Harvard, Vancouver, ISO, and other styles
8

Callwood, June. Twelve Weeks in Spring: The Inspiring Story of Margaret and Her Team. Key Productions, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Callwood, June. Twelve Weeks in Spring: The Inspiring Story of Margaret and Her Team. Key Porter Books, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Rogue Basin Fisheries Evaluation Project (Or.), Oregon. Dept. of Fish and Wildlife., and United States. Army. Corps of Engineers. Portland District., eds. Effects of Lost Creek Dam on spring chinook salmon in the Rogue River: Phase II completion report. Portland, OR: Oregon Dept. of Fish and Wildlife, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Sprint Phases"

1

Gutfreund, Hanoch. "Otto Stern—With Einstein in Prague and in Zürich." In Molecular Beams in Physics and Chemistry, 89–96. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63963-1_6.

Full text
Abstract:
AbstractThe two years that Otto Stern spent with Albert Einstein in Prague and Zürich, between the spring of 1912 and the spring of 1914, can be viewed as his apprenticeship in theoretical physics. This chapter describes that formative phase in Stern’s scientific career, prior to his emergence as one of the greatest innovators in experimental physics.
APA, Harvard, Vancouver, ISO, and other styles
2

Ciprian, R., M. Carbucicchio, and G. Turilli. "Exchange-spring magnets based on L10-FePt ordered phase." In ISIAME 2008, 363–70. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01370-6_47.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Awrejcewicz, Jan, Roman Starosta, and Grażyna Sypniewska-Kamińska. "Asymptotic Analysis and Limiting Phase Trajectories in the Dynamics of Spring Pendulum." In Springer Proceedings in Mathematics & Statistics, 161–73. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08266-0_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Chochinov, Claire A., and Alex N. Nguyen Ba. "Bulk-Fitness Measurements Using Barcode Sequencing Analysis in Yeast." In Methods in Molecular Biology, 399–415. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2257-5_22.

Full text
Abstract:
AbstractThe use of DNA barcodes for determining changes in genotype frequencies has been instrumental to increase the scale at which we can phenotype strain libraries by using next-generation sequencing technologies. Here, we describe the determination of strain fitness for thousands of yeast strains simultaneously in a single assay using recent innovations that increase the precision of these measurements, such as the inclusion of unique-molecular identifiers (UMIs) and purification by solid-phase reverse immobilization (SPRI) beads.
APA, Harvard, Vancouver, ISO, and other styles
5

Ahmadian, Hassan, and Payam Mohseni. "Iran’s Syria Strategy: The Evolution of Deterrence." In NL ARMS, 231–60. The Hague: T.M.C. Asser Press, 2020. http://dx.doi.org/10.1007/978-94-6265-419-8_13.

Full text
Abstract:
AbstractIran has been a critical player in the Syrian war since 2011, crafting a complex foreign policy and military strategy to preserve its Syrian ally. What have been the drivers of Iranian decision-making in this conflict? And how has Iranian strategy evolved over the course of the war? This chapter argues that the logic of deterrence has been fundamental not just for shaping the contours of Iran–Syria relations since the Islamic Revolution of 1979, but also for determining the overall trajectory of Iranian strategy in the Syrian war. The authors outline Iran’s decision-making calculus and divide the country’s strategy on Syria after the Arab Spring into four primary phases: (1) a ‘Basij’ strategy to establish local militias in Syria; (2) a regionalization strategy to incorporate transnational fighters and militias in the war effort; (3) an internationalization strategy to incorporate Russia and balance the United States; and (4) a post-ISIS deterrence strategy to balance against the United States, Turkey and Israel. Iran’s Syria strategy progressively escalated in response to the possible defeat of its ally and the deterioration of its forward deterrence capacities against the United States and Israel. Today, the potential for direct inter-state conflict is rising as proxy warfare declines and Iran attempts to maintain the credibility of its forward deterrence.
APA, Harvard, Vancouver, ISO, and other styles
6

Deng, Yusheng, Xindong Wei, Yan Huang, and Gao-Feng Zhao. "Numerical study of the strain rate dependency of indirect tensile strength with a four-phase lattice spring model." In Rock Dynamics: Progress and Prospect, Volume 2, 85–90. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003359159-16.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Kosaretsky, Sergey, Sergey Zair-Bek, Yuliya Kersha, and Roman Zvyagintsev. "General Education in Russia During COVID-19: Readiness, Policy Response, and Lessons Learned." In Primary and Secondary Education During Covid-19, 227–61. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-81500-4_9.

Full text
Abstract:
AbstractIn this chapter, we analyze nationwide measures taken in Russia to organize the education system during the pandemic. We show the opportunities and limitations for responses associated relative to the previous policy phase. Special attention is paid to the peculiarities of a system reaction to the situation of a pandemic in a federative country with heterogeneous regions. In contrast to several other countries that adopted a single national strategy, different scenarios were implemented in Russian regions. We investigate the factors that influenced the scenarios and management decisions at the national and regional levels of the country. We highlight differences in the nature and dynamics of measures taken to organize learning in the first (spring–summer 2020) and second (autumn–winter 2020) waves of the pandemic. We also analyze the subjective experience and wellbeing of students and teachers during a pandemic. As the empirical base, we use data from several large sociological studies conducted in the Russian Federation over the past six months on the issues of school closures, distance learning, and the “new normal.” This provides a new perspective for studying the increasing education gap between children with different socioeconomic status due to the pandemic.
APA, Harvard, Vancouver, ISO, and other styles
8

Seyfried, W. E., and Kang Ding. "Phase Equilibria in Subseafloor Hydrothermal Systems: a Review of the Role of Redox, Temperature, Ph and Dissolved Cl on the Chemistry of Hot Spring Fluids at Mid-Ocean Ridges." In Seafloor Hydrothermal Systems: Physical, Chemical, Biological, and Geological Interactions, 248–72. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm091p0248.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Sanzo, Karen L., Tancy Vandecar-Burdin, Tisha M. Paredes, Lisa Mayes, and Brian Payne. "Re-Imagining the Future of Experiential Learning Through a Campus-Wide Design Thinking Initiative." In Applying Design Thinking to the Measurement of Experiential Learning, 147–62. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7768-4.ch010.

Full text
Abstract:
In 2020, Old Dominion University was awarded a State Council for Higher Education for Virginia grant in order to re-imagine the future of experiential learning at the institution. This campus-wide effort is led by a taskforce to create a vision, framework, and plan for the future of experiential learning at Old Dominion University. The taskforce is composed of stakeholders that include students, faculty, administrators, and community and business partners. In this chapter, the authors report on process and progress, with particular attention to the first three phases of the design thinking process. In the empathy phase, they have engaged in design thinking sprints, hosted monthly taskforce meetings, engaged in an exhaustive review of current experiential learning activities, and deployed surveys of relevant stakeholders. During the defining phase, they analyzed initial data, synthesized their collective empathy work, and identified root issues to craft their “How might we” questions to inform the ideation work. In this chapter, they also share the results of the ideation phase.
APA, Harvard, Vancouver, ISO, and other styles
10

Patel, Ravin, Austin Wetzler, Nicholas Bennett, and Merrick Wetzler. "Injuries in Rugby Union: A Review." In Injury and Sports Medicine [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.107380.

Full text
Abstract:
Rugby Union is one of the most popular team sports in the world. It is a contact sport that emphasizes possession and control of the ball. By virtue of its full contact nature and lack of protective equipment, Rugby Union is associated with a high incidence of injury relative to many other sports. In fact, Rugby Union carries a significantly higher relative risk of injury than American football, with increase differences in the overall rates of injuries. There are multiple distinct phases of Rugby Union: The Scrum, Tackle, Ruck, Maul and Lineout. Each phase of rugby has its own inherent risk and incidence of injuries which include but not limited to concussions, as well as sprains, strains, and fractures of the upper and lower extremity ligament. The majority of injuries occur either during the scrum and tackling phases of the game. The governing body of Rugby Union is constantly adapting the rules to reduce injuries. Some of these rule changes may have unintended consequences. This article will review the current literature and describe the injuries in each phase of rugby as well as discussing concussion and the effect Covid-19 has had on Rugby Union.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Sprint Phases"

1

te Riele, Freek L. S., Edsko E. G. Hekman, and Just L. Herder. "Planar and Spatial Gravity Balancing With Normal Springs." In ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/detc2004-57164.

Full text
Abstract:
Very often, spring-to-gravity-balancing mechanisms are conceived with ideal (zero-free-length l0=0) springs. However, the use of ideal springs in the conception phase tends to lead to more complex mechanisms because the ideal spring functionality has to be approximated with normal springs. To facilitate construction of (gravity) balancers, employing normal springs (l0≠0) directly mounted between the link attachment points of the mechanism in the conception phase therefore seems beneficiary. This paper discusses spring mechanisms that enable perfect balancing of gravity acting on an inverted pendulum while employing normal springs between the spring-attachment points: The design synthesis of such mechanisms will be explained and balancing conditions will be derived, using a potential energy consideration.
APA, Harvard, Vancouver, ISO, and other styles
2

Peterson, Matthew, and Joshua D. Summers. "Recommended Methods Supporting Adoption of the Agile Philosophy for Hardware Development." In ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-70621.

Full text
Abstract:
Abstract The objective of this research is to understand the historical evolution of software development, identify desirable characteristics of methods supporting agile for hardware, and recommend potential methods enabling agile development of hardware products. As technology and markets change, product development increasingly operates in a volatile, uncertain, complex, and ambiguous (VUCA) environment. While originally applied to software development, organizations are starting to see opportunity in adapting the agile philosophy for hardware development. A comparison of philosophies is made between waterfall, spiral, and agile development. The historical evolutions of software development, after agile, including Continuous Integration Continuous Deployment (CICD), Development and Operations (DevOps), and Development Security and Operations (DevSecOps) is presented. Benefits and challenges in the application of agile methods for hardware are presented. Benefits include improvements in flexibility in response to change and soft factors such as team communication, transparency and commitment. However, many challenges still remain. These are grouped into theme areas including lack of product flexibility, difficulty in separating deliverables, challenges with breaking down tasks within a sprint, changes needed in culture and mindset, difficulty scaling beyond pilot programs, team distribution, and development of an integrated approach across the product lifecycle. Potential methods to aid in the adoption of agile for hardware are discussed using the phases of the hardware development lifecycle as a framework. Recommended methods include the adaptation of Model Based Systems Engineering (MBSE) for problem definition, the use of generative methods for design, the application of Virtual Reality (VR) for prototyping, leveraging additive manufacturing for production, and favoring software defined systems to help in operations. By reducing both the duration and person-hours, these methods enable higher iteration rates for hardware products needed for an agile philosophy. The paper concludes with a discussion on future research efforts supporting the enabling agile development of hardware.
APA, Harvard, Vancouver, ISO, and other styles
3

Huang, Ching-Ying, Kuan-Han Hsieh, and Robert Hu. "40 nm-CMOS W-band Phase Shifter for Millimeter-wave Phased Array." In 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring). IEEE, 2019. http://dx.doi.org/10.1109/piers-spring46901.2019.9017537.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Sahoo, Saikat, Aditya Jain, and Dilip Kumar Pratihar. "Reduction of Jerk Through Optimization of a Knee Assistive Device Designed Using Four-Bar Controlled Compliance Actuator." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87012.

Full text
Abstract:
Two major responsibilities are taken by a knee joint during level ground walking of a human being. At stance phase, knee joint is locked in order to provide stability against ground reaction force, and in swing phase, knee flexes for ground clearance of the foot. In this study, a four-bar controlled compliance actuator (FCCA) has been configured for assisting the knee joint during walking. The main focus of FCCA design is the reduction of required mechanical power through a compliance actuation strategy and amplification of motor power. The proposed design consists of two linear spring-damper systems, out of which, one controls the locking of knee during stance phase and another takes care of knee flexion at swing phase. Without a proper selection of stiffness and damping coefficient for both the springs, the knee may be subjected to jerk during flexion, which may give rise to discomfort to the user and consequently, he/she may fall during walking. This study aims to ensure smooth knee operation in both stance phase as well as swing phase by assigning the proper spring stiffness and damping coefficient for both the springs. The responsibility is given to a non-traditional optimization tool, namely particle swarm optimization (PSO). The optimization is carried out using a co-simulation approach between Matlab and ADAMS. The aim of PSO (run in Matlab) is to minimize both the frequency as well as amplitude of the jerk by finding a suitable set of design variables, that is, spring stiffness and damping coefficient of two spring-damper systems.
APA, Harvard, Vancouver, ISO, and other styles
5

Zaki, Wael, and N. V. Viet. "Analytical Model of Shape Memory Alloy Helical Springs." In ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/smasis2018-8075.

Full text
Abstract:
A new analytical model is proposed for superelastic helical SMA springs subjected to axial loading. The model is derived based on the ZM constitutive model for SMAs and is applicable to springs with index greater than 4 and pitch angle greater than 15°, which are common specifications in engineering applications. The analytical axial force-deformation relation for the helical spring is derived taking into account phase transformation within the SMA and the model is validated against 3D finite element analysis results.
APA, Harvard, Vancouver, ISO, and other styles
6

Frendo, Francesco, Vincenzo Sarra, and Michele Spina. "Finite Element Analysis of Side-Load Springs for McPherson Front Suspensions." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95573.

Full text
Abstract:
In the present work, the operating conditions of “side-load” springs, which are typically employed in McPherson suspensions, were analysed by finite element analysis. The finite element model, including the spring and the upper and lower spring seats, is firstly described in the paper; the spring geometry was accurately obtained by a reverse engineering procedure based on two video cameras and a video projector. Surface to surface contact elements were defined between spring and seats; the initial assembling phase of the spring between the seats was also included in the finite element analysis. The experimental rig, employed for spring characterisation, and the performed numerical analyses are then presented; results are discussed in comparison with experimental data, in terms of spring characteristic, side-load force and thrust axis spatial position, as a function of spring compression. A fully satisfactory agreement was generally observed between numerical results and experiments. The effect of lower spring seat orientation on results was also investigated by numerical analysis. A higher inclination of the lower seat appeared to increase the side-load force; at the same time, for a given configuration, the thrust axis orientation, remained almost constant during suspension compression.
APA, Harvard, Vancouver, ISO, and other styles
7

Sousa, Vagner Candido de, Tarcísio Marinelli Pereira da Silva, and Carlos De Marqui. "Modeling and Experimental Verification of the Aeroelastic Behavior of a Typical Airfoil Section With Shape Memory Alloy Springs." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3920.

Full text
Abstract:
This paper presents the modeling, simulation and wind tunnel experimental verification of the aeroelastic behavior of a two-degree-of-freedom (pitch and plunge) typical airfoil section with superelastic shape memory alloy helical springs in the pitch degree-of-freedom. A linearly elastic spring is considered in the plunge degree-of-freedom. Although viscous damping is considered in both degrees-of-freedom, hysteretic damping simultaneously takes place in the pitch degree-of-freedom due to the (stress-induced) pseudoelastic behavior of the shape memory alloy springs. The shape memory alloy phase transformation kinetics and constitutive modeling are based on Brinsons model and the shape memory alloy helical spring behavior is based on classical spring design. The nonlinear effects of shape memory alloy phase transformation are included in the shape memory alloy spring modeling for the representation of hysteretic force-displacement behavior. A two-state linear aerodynamic model is employed to determine the unsteady pitching moment and lift. The aeroelastic behavior of the typical section is numerically and experimentally investigated for different preload levels applied to the shape memory alloys. Numerical predictions and experimental results show that for large enough preload levels (such that shape memory alloy phase transformations take place at small pitch angles) unstable post-flutter regime is replaced by stable limit-cycle oscillations. Moreover, the amplitudes of aeroelastic oscillations decrease with increasing preload levels since more expressive phase transformations are achieved at small pitch angles. Although the amplitudes of the post-flutter limit-cycle oscillations increase with increasing airflow speed (since aerodynamic loads increase with the square of the airflow speed), they remain bounded within acceptable levels over a range of airflow speeds due to hysteretic damping. Moreover, the cutoff airflow speed increases with increasing preload. The experimentally verified results show that the pseudoelastic behavior of shape memory alloy elements can passively enhance the aeroelastic behavior of a typical section.
APA, Harvard, Vancouver, ISO, and other styles
8

Knowles, Gareth, Ross Bird, and Victor Birman. "Shape Memory Alloy Springs Used as Reduced Power/Weight Actuators." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60401.

Full text
Abstract:
The paper presents a concept and realization of using shape memory alloy (SMA) spring actuators for deployment of flight control surfaces of small air vehicles. These actuators replace heavy servomotors resulting in increased endurance of the vehicle as well as reduced power consumption. The actuator represents a spiral wound tubular SMA helical spring that is extended in its martensitic phase prior to actuation. The actuation can be achieved by directing exhaust gas from the onboard engine, i.e. providing an influx of heat. When activated, the spring returns to its original (compressed) shape generating a force in the range of 10 to 25 lbf. The advantage of using SMA springs is related to the enhanced stiffness after activation, as the material transforms from the martensitic to austenitic phase. Such added rigidity is useful to deploy telescoping wing surfaces and implement extensive geometric airframe changes. Numerical examples conducted with a typical spring material and geometry illustrated that the required stroke can be achieved with the spring index of about 10, coil diameter of 2.5 inches and SMA diameter in the range from 0.14 to 0.24 inches. Experimental data confirms these numerical predictions. The present study has proven the feasibility of using SMA actuators for the deployment of wing surfaces of small air vehicles.
APA, Harvard, Vancouver, ISO, and other styles
9

Dadashzadeh, Behnam, and Mohammad Mahjoob Jahromi. "Dynamics Synchronization of the Running of Planar Biped Robots With SLIP Model in Stance Phase." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20482.

Full text
Abstract:
In this work a control law is derived to synchronize dynamics of multibody biped robots and the spring loaded inverted pendulum (SLIP) model in stance phase of running. The goal is to use the vast literature on the SLIP model dynamics for the control of real multibody robots. Three kneed biped robot models are considered in this work: with springs parallel to motors, with springs series to motors, and without springs. Dynamic equations of the multibody biped models are derived using Lagrange equation and then the applicability of the derived control law to these models are investigated using simulation. The initial state of the multibody robot is found such that its center of mass (CoM) has the same initial condition as SLIP model. Then the trajectory of its CoM is compared to SLIP model. Also motor torque profiles are compared for the models with and without springs and also for the motors with and without rotor inertias. The results show that the effect of rotor inertia is a big challenge in implementing fast biped running on real robots.
APA, Harvard, Vancouver, ISO, and other styles
10

Jain, Deepti, H. Nanda, R. Nath, D. S. Chitnis, V. Ganesan, Alka B. Garg, R. Mittal, and R. Mukhopadhyay. "Bacterial Spring Constant in Log-Phase Growth." In SOLID STATE PHYSICS, PROCEEDINGS OF THE 55TH DAE SOLID STATE PHYSICS SYMPOSIUM 2010. AIP, 2011. http://dx.doi.org/10.1063/1.3605786.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Sprint Phases"

1

Wiltse, M. A. Radon hazard assessment orientation survey, Circle Hot Springs area, phase 1. Alaska Division of Geological & Geophysical Surveys, 1986. http://dx.doi.org/10.14509/1272.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Aragon, Malynda Jo, Randy L. Everett, Malcolm Dean Siegel, Richard Joseph Kottenstette, William E. Holub, Jr, Jeremy B. Wright, and Brian P. Dwyer. Arsenic pilot plant operation and results - Socorro Springs, New Mexico - phase 1. Office of Scientific and Technical Information (OSTI), May 2007. http://dx.doi.org/10.2172/909390.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Aragon, Malynda Jo, Brian P. Dwyer, Randy L. Everett, William E. Holub, Richard Joseph Kottenstette, Malcolm D. Siegel, and Jerome L. Wright. Arsenic Pilot Plant Operation and Results- Socorro Springs, New Mexico- Phase 1. Office of Scientific and Technical Information (OSTI), August 2007. http://dx.doi.org/10.2172/1504208.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Koegler, S. S., R. K. Nakaoka, R. K. Farnsworth, and S. O. Bates. Vitrification technologies for Weldon Spring raffinate sludges and contaminated soils - Phase 2 Report: Screening of Alternatives. Office of Scientific and Technical Information (OSTI), November 1989. http://dx.doi.org/10.2172/5273009.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Koegler, S. S., K. H. Oma, and J. M. Jr Perez. Vitrification technologies for Weldon Spring raffinate sludges and contaminated soils: Phase I report: Development of alternatives. Office of Scientific and Technical Information (OSTI), December 1988. http://dx.doi.org/10.2172/6848976.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Bracewell, Jef. Coastal topography change at Gulf Islands National Seashore, Texas: 2018–2021 data summary. National Park Service, May 2022. http://dx.doi.org/10.36967/nrds-2293377.

Full text
Abstract:
In the spring of 2018 and 2021, the Gulf Coast Network collected coastal topography data at Gulf Islands National Seashore as a part of the NPS Vital Signs Monitoring Program. Monitoring was conducted following methods detailed in Monitoring Coastal Topography at Gulf Coast Network Parks: Protocol Implementation Plan (PIP; Bracewell 2017). Key findings from this effort are as follows: In Florida, the Perdido Key unit showed higher losses in profile area as well as retreat in dune crest and shoreline position than in the Fort Pickens unit. Because of unfavorable weather conditions and a compressed survey window, six of 16 transects in Mississippi were not surveyed in 2021. The highest rates of loss in profile area on Horn Island were at the western end. Three pilot monitoring transects were added in 2021 at Fort Pickens area, updrift, or east of the Gulf Coast Network's established effort. This expands survey coverage about 3 kilometers (1.9 miles [mi]) and incorporates a portion of the narrower, washover-prone section of the unit. This project is in the early phases of implementation and will benefit from future surveys to better understand the influence of slight changes in survey timing and other environmental variations.
APA, Harvard, Vancouver, ISO, and other styles
7

Bracewell, Jeff. Coastal topography change at Gulf Islands National Seashore, Florida and Mississippi: 2018–2021 data summary—version 1.1. National Park Service, August 2022. http://dx.doi.org/10.36967/2293995.

Full text
Abstract:
In the spring of 2018 and 2021, the Gulf Coast Network collected coastal topography data at Gulf Islands National Seashore as a part of the NPS Vital Signs Monitoring Program. Monitoring was conducted following methods detailed in Monitoring Coastal Topography at Gulf Coast Network Parks: Protocol Implementation Plan (PIP; Bracewell 2017). Key findings from this effort are as follows: In Florida, the Perdido Key unit showed higher losses in profile area as well as retreat in dune crest and shoreline position than in the Fort Pickens unit. Because of unfavorable weather conditions and a compressed survey window, six of 16 transects in Mississippi were not surveyed in 2021. The highest rates of loss in profile area on Horn Island were at the western end. Three pilot monitoring transects were added in 2021 at Fort Pickens area, updrift, or east of the Gulf Coast Network's established effort. This expands survey coverage about 3 kilometers (1.9 miles [mi]) and incorporates a portion of the narrower, washover-prone section of the unit. This project is in the early phases of implementation and will benefit from future surveys to better understand the influence of slight changes in survey timing and other environmental variations. - -
APA, Harvard, Vancouver, ISO, and other styles
8

Thorne, Sarah, David Kovacs, Joseph Gailani, and Burton Suedel. A community engagement framework using mental modeling : the Seven Mile Island Innovation Lab community engagement pilot—Phase I. Engineer Research and Development Center (U.S.), August 2022. http://dx.doi.org/10.21079/11681/44983.

Full text
Abstract:
The US Army Corps of Engineers (USACE) engages and collaborates with multiple stakeholders—from agency partners, to public, private, and not-for-profit organizations, to community residents—to develop its dredged-sediment long-term management strategy (LTMS) that expands benefi-cial-use (BU) practices. In spring 2019, USACE collaborated with Decision Partners, the USACE–Philadelphia District Operations Division, The Wetlands Institute, and the Engineering With Nature program leadership to adapt, test, and refine the proven behavioral-science-based processes, methods, and tools based on Decision Partners’ Mental Modeling Insight, or MMI, approach for engaging stakeholders, including community members, as part of the Seven Mile Island Innovation Laboratory (SMIIL) initiative in coastal New Jersey. The team identified key community stakeholders and conducted research to better understand their values, interests, priorities, and preferences regarding wetlands and USACE activities in the Seven Mile Island area and those activities’ effects on wetlands, including protecting the environment, wildlife habitat, aesthetic beauty, maintaining navigability, and supporting coastal resilience. Understanding stakeholder needs, values, interests, priorities, and preferences is key to designing effective engagement strategies for diverse communities for SMIIL and provides a foundation for the community engagement framework currently being developed for application across USACE.
APA, Harvard, Vancouver, ISO, and other styles
9

Hall, Mark, and Neil Price. Medieval Scotland: A Future for its Past. Society of Antiquaries of Scotland, September 2012. http://dx.doi.org/10.9750/scarf.09.2012.165.

Full text
Abstract:
The main recommendations of the panel report can be summarised under five key headings. Underpinning all five areas is the recognition that human narratives remain crucial for ensuring the widest access to our shared past. There is no wish to see political and economic narratives abandoned but the need is recognised for there to be an expansion to more social narratives to fully explore the potential of the diverse evidence base. The questions that can be asked are here framed in a national context but they need to be supported and improved a) by the development of regional research frameworks, and b) by an enhanced study of Scotland’s international context through time. 1. From North Britain to the Idea of Scotland: Understanding why, where and how ‘Scotland’ emerges provides a focal point of research. Investigating state formation requires work from Medieval Scotland: a future for its past ii a variety of sources, exploring the relationships between centres of consumption - royal, ecclesiastical and urban - and their hinterlands. Working from site-specific work to regional analysis, researchers can explore how what would become ‘Scotland’ came to be, and whence sprang its inspiration. 2. Lifestyles and Living Spaces: Holistic approaches to exploring medieval settlement should be promoted, combining landscape studies with artefactual, environmental, and documentary work. Understanding the role of individual sites within wider local, regional and national settlement systems should be promoted, and chronological frameworks developed to chart the changing nature of Medieval settlement. 3. Mentalities: The holistic understanding of medieval belief (particularly, but not exclusively, in its early medieval or early historic phase) needs to broaden its contextual understanding with reference to prehistoric or inherited belief systems and frames of reference. Collaborative approaches should draw on international parallels and analogues in pursuit of defining and contrasting local or regional belief systems through integrated studies of portable material culture, monumentality and landscape. 4. Empowerment: Revisiting museum collections and renewing the study of newly retrieved artefacts is vital to a broader understanding of the dynamics of writing within society. Text needs to be seen less as a metaphor and more as a technological and social innovation in material culture which will help the understanding of it as an experienced, imaginatively rich reality of life. In archaeological terms, the study of the relatively neglected cultural areas of sensory perception, memory, learning and play needs to be promoted to enrich the understanding of past social behaviours. 5. Parameters: Multi-disciplinary, collaborative, and cross-sector approaches should be encouraged in order to release the research potential of all sectors of archaeology. Creative solutions should be sought to the challenges of transmitting the importance of archaeological work and conserving the resource for current and future research.
APA, Harvard, Vancouver, ISO, and other styles
10

Phase 2 groundwater quality assessment for the Weldon Spring site chemical plant/raffinate pits and surrounding vicinity properties. Office of Scientific and Technical Information (OSTI), August 1989. http://dx.doi.org/10.2172/5626469.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Sprint Phases' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography