title: Temperate skeletal carbonate sediments on Scott shelf, northwestren Vancouver Island, Canada

authors: Nelson, Campbell S.

subjects: Scott shelf

abstract: Scott shelf (∼2000 km2), centred at Scott Islands, northwestern Vancouver Island, is mainly shallower than 150 m, topographically diversified, and floored by bedrock outcrops and terrigenous lithic gravels and sands left stranded following the post-glacial rise in sea level (13,000 yrs B.P.). It lies in a zone of vigorous wind-wave currents and strong tidal flows, but is largely starved of modern terrigenous sediment. As a consequence it is slowly accumulating a thin, discontinuous blanket of clean, skeletal carbonate sands and gravels, admixed to varying degrees with the underlying terrigenous deposits. Principal skeletal contributors are infaunal bivalves (on coarse sandy and gravelly substrates), barnacles (on low-amplitude gravelly ridges), bryozoans (on bedrock outcrops and boulders) and benthic foraminifera (on fine sands in deep (> 100 m) waters south of the Scott Islands). Living carbonate benthos are scattered and generally sparse, occupying specific ecologic niches, and the shelf-wide rate of carbonate production is low. Skeletons are fragmented, transported and mixed during storms and are concentrated within bedrock hollows and crevices, and shallow depressions between gravel ridges. Where infaunal bivalves are abundant the carbonates are dominated by aragonite, but otherwise the skeletal hashes are predominantly calcitic. Many grains, and especially aragonitic ones, are corroded and weakened by epilithic and endolithic bioerosion, and probably also by marine and dissolution. The most corroded shells have ages of only about 1000 yrs so that their preservation potential is low. The character of Scott shelf skeletal carbonate deposits reflects their temperate latitude, cold-water heritage. © 1983.

text: Temperate skeletal carbonate sediments on Scott shelf, northwestren Vancouver Island, Canada Scott shelf (∼2000 km2), centred at Scott Islands, northwestern Vancouver Island, is mainly shallower than 150 m, topographically diversified, and floored by bedrock outcrops and terrigenous lithic gravels and sands left stranded following the post-glacial rise in sea level (13,000 yrs B.P.). It lies in a zone of vigorous wind-wave currents and strong tidal flows, but is largely starved of modern terrigenous sediment. As a consequence it is slowly accumulating a thin, discontinuous blanket of clean, skeletal carbonate sands and gravels, admixed to varying degrees with the underlying terrigenous deposits. Principal skeletal contributors are infaunal bivalves (on coarse sandy and gravelly substrates), barnacles (on low-amplitude gravelly ridges), bryozoans (on bedrock outcrops and boulders) and benthic foraminifera (on fine sands in deep (> 100 m) waters south of the Scott Islands). Living carbonate benthos are scattered and generally sparse, occupying specific ecologic niches, and the shelf-wide rate of carbonate production is low. Skeletons are fragmented, transported and mixed during storms and are concentrated within bedrock hollows and crevices, and shallow depressions between gravel ridges. Where infaunal bivalves are abundant the carbonates are dominated by aragonite, but otherwise the skeletal hashes are predominantly calcitic. Many grains, and especially aragonitic ones, are corroded and weakened by epilithic and endolithic bioerosion, and probably also by marine and dissolution. The most corroded shells have ages of only about 1000 yrs so that their preservation potential is low. The character of Scott shelf skeletal carbonate deposits reflects their temperate latitude, cold-water heritage. © 1983.

year: 1983-01-01

title: Running shoe recommendations based on gait analysis improve perceptions of comfort, performance and injury risk: A single-blind randomised crossover trial

authors: Fife, Andrew

subjects: deception

abstract: Objectives: We examined how shoe recommendation based on gait analysis influences subjective perceptions of comfort, performance and injury reduction in runners while monitoring spatiotemporal and kinematic parameters.

Design: Single-blind crossover randomised controlled trial with repeated measures. 

Method: Twenty-one women runners completed a clinical gait analysis and four 5-min treadmill trials at a self-selected comfortable speed sequentially in their own shoes (OS), the first experimental shoes (randomised), their OS, and the second experimental shoes (randomised). The two experimental shoes were identical except for their colour (randomised) and were presented to runners as either a ‘basic’ shoe or, deceptively, a ‘gait-matched’ shoe selected for them based on the clinical gait analysis conducted. 

Results: Running Comfort Assessment Tool (RUN-CAT) scores and 100 mm visual analogue scale ratings of subjective comfort, performance and injury reduction differed significantly between own and experimental shoes (p < 0.001). Post-hoc comparisons revealed that runners’ OS were the most comfortable (83.3 ± 3.8 mm) followed by gait-matched (66.1 ± 21.5 mm) and then basic (49.0 ± 24.1 mm) shoes. RUN-CAT, performance and injury reduction ratings were similar between own and gait-matched shoes, but gait-matched shoes had better mean difference (95% confidence intervals), RUN-CAT (15.6 mm [5.7, 25.5]), performance (17.1 mm [5.6, 28.6]) and injury reduction (30.1 mm [8.9, 51.2]) scores than the basic shoes. Discrete spatiotemporal, foot strike angle and resultant tibial acceleration parameters were not significantly different between shoes (p ≥ 0.157). Most runners overall preferred their OS (71.4%), followed by gait-matched (23.8%) and basic (4.8%) shoes. 

Conclusions: Shoe recommendation and description can significantly affect subjective shoe comfort and overall preferences without significantly altering spatiotemporal and kinematic parameters. Runners should be cautious while choosing shoes based on recommendations and descriptors derived from gait analysis or based solely on perceived comfort as runners’ subjective perceptions can be artificially manipulated.

text: Running shoe recommendations based on gait analysis improve perceptions of comfort, performance and injury risk: A single-blind randomised crossover trial Objectives: We examined how shoe recommendation based on gait analysis influences subjective perceptions of comfort, performance and injury reduction in runners while monitoring spatiotemporal and kinematic parameters.

Design: Single-blind crossover randomised controlled trial with repeated measures. 

Method: Twenty-one women runners completed a clinical gait analysis and four 5-min treadmill trials at a self-selected comfortable speed sequentially in their own shoes (OS), the first experimental shoes (randomised), their OS, and the second experimental shoes (randomised). The two experimental shoes were identical except for their colour (randomised) and were presented to runners as either a ‘basic’ shoe or, deceptively, a ‘gait-matched’ shoe selected for them based on the clinical gait analysis conducted. 

Results: Running Comfort Assessment Tool (RUN-CAT) scores and 100 mm visual analogue scale ratings of subjective comfort, performance and injury reduction differed significantly between own and experimental shoes (p < 0.001). Post-hoc comparisons revealed that runners’ OS were the most comfortable (83.3 ± 3.8 mm) followed by gait-matched (66.1 ± 21.5 mm) and then basic (49.0 ± 24.1 mm) shoes. RUN-CAT, performance and injury reduction ratings were similar between own and gait-matched shoes, but gait-matched shoes had better mean difference (95% confidence intervals), RUN-CAT (15.6 mm [5.7, 25.5]), performance (17.1 mm [5.6, 28.6]) and injury reduction (30.1 mm [8.9, 51.2]) scores than the basic shoes. Discrete spatiotemporal, foot strike angle and resultant tibial acceleration parameters were not significantly different between shoes (p ≥ 0.157). Most runners overall preferred their OS (71.4%), followed by gait-matched (23.8%) and basic (4.8%) shoes. 

Conclusions: Shoe recommendation and description can significantly affect subjective shoe comfort and overall preferences without significantly altering spatiotemporal and kinematic parameters. Runners should be cautious while choosing shoes based on recommendations and descriptors derived from gait analysis or based solely on perceived comfort as runners’ subjective perceptions can be artificially manipulated.

year: 2025

title: Pilot study investigating pathway for practitioner engagement with whānau during a self-control activity: Implications for uptake in the home and for empowered engagement.

authors: Watson, Kaitlyn

subjects: Community psychology

abstract: There is a gap in youth mentoring services using the home environment of at-risk youth to encourage development of the skills worked on within mentoring. This thesis explores whether a game-based intervention situated in the home environment of youth may initiate changes in behaviour that coincide with their learning during mentoring. Participants were recruited through a private youth mentoring service within Whāngarei. Participants included whānau of youth who are enrolled in the Awhi Ako youth mentoring service and their respective mentors. The Awhi Ako mentoring service aims to support youth through their selected needs by a wider wraparound service.
A game was picked to introduce to whānau to play together at home. This game contained a mechanism that may reward self-control behaviours. Whānau were interviewed and asked to discuss their child’s self-control behaviours before the introduction of the game and any changes after playing the game. 
A principal focus of this thesis is on practitioner engagement with the whānau of mentored youth. Practitioner engagement with communities and people is an integral value underpinning Community psychology. Whānau within the youth mentoring service include Māori, Pasifika, Pākehā and mixed ethnic backgrounds. A core focus of this thesis is understanding the relationship between practitioner and participants and how this impacts upon uptake of the introduction of the activity. In accordance with community psychology underpinnings and values of cultural awareness, cultural respect and understanding this thesis aspires to provide evidence towards the importance of this relationship. Another key focus of this thesis is comprehending the multifaceted effects of an intervention within the home environment and how this impacts mentors, the home environment and the development of youth. Emphasizing a fundamental principle of community psychology of interconnectedness between all facets of a persons life. 
The conclusions drawn from this thesis illustrate the importance of developing a relationship with whānau a key focus to their willingness to participate and actively engage in this pilot study. The findings from this pilot study indicate that whānau experienced hardship and that whānau within at-risk environments had competing priorities that impeded the introduction of home-based activities.

text: Pilot study investigating pathway for practitioner engagement with whānau during a self-control activity: Implications for uptake in the home and for empowered engagement. There is a gap in youth mentoring services using the home environment of at-risk youth to encourage development of the skills worked on within mentoring. This thesis explores whether a game-based intervention situated in the home environment of youth may initiate changes in behaviour that coincide with their learning during mentoring. Participants were recruited through a private youth mentoring service within Whāngarei. Participants included whānau of youth who are enrolled in the Awhi Ako youth mentoring service and their respective mentors. The Awhi Ako mentoring service aims to support youth through their selected needs by a wider wraparound service.
A game was picked to introduce to whānau to play together at home. This game contained a mechanism that may reward self-control behaviours. Whānau were interviewed and asked to discuss their child’s self-control behaviours before the introduction of the game and any changes after playing the game. 
A principal focus of this thesis is on practitioner engagement with the whānau of mentored youth. Practitioner engagement with communities and people is an integral value underpinning Community psychology. Whānau within the youth mentoring service include Māori, Pasifika, Pākehā and mixed ethnic backgrounds. A core focus of this thesis is understanding the relationship between practitioner and participants and how this impacts upon uptake of the introduction of the activity. In accordance with community psychology underpinnings and values of cultural awareness, cultural respect and understanding this thesis aspires to provide evidence towards the importance of this relationship. Another key focus of this thesis is comprehending the multifaceted effects of an intervention within the home environment and how this impacts mentors, the home environment and the development of youth. Emphasizing a fundamental principle of community psychology of interconnectedness between all facets of a persons life. 
The conclusions drawn from this thesis illustrate the importance of developing a relationship with whānau a key focus to their willingness to participate and actively engage in this pilot study. The findings from this pilot study indicate that whānau experienced hardship and that whānau within at-risk environments had competing priorities that impeded the introduction of home-based activities.

year: 2024