title: Transient wind-driven coastal upwelling on a shelf with varying width and orientation

authors: Longdill, Peter C.

subjects: upwelling

abstract: Cross-correlations between along-shelf wind stress and both along- and cross-shelf currents within the central Bay of Plenty, New Zealand show the circulation during spring–summer to be highly responsive to wind events. Current meter records indicate that upwelling-favourable wind stresses generate upwelling dynamics in both mean and fluctuating senses. Both thermistor moorings and satellite inferred temperature data record the outcropping of this cool water following upwelling-favourable wind stresses. The upwelling circulation provides an efficient mechanism for the periodic delivery of cool (c. <15°C), nutrient rich (NOx- N >80 µg litre–1 ) water to the coastal zone during spring. Historical wind forcing data suggest that the wind-forced dynamics described were responsible for a major toxic algal bloom within the Bay of Plenty during 1992–93.

text: Transient wind-driven coastal upwelling on a shelf with varying width and orientation Cross-correlations between along-shelf wind stress and both along- and cross-shelf currents within the central Bay of Plenty, New Zealand show the circulation during spring–summer to be highly responsive to wind events. Current meter records indicate that upwelling-favourable wind stresses generate upwelling dynamics in both mean and fluctuating senses. Both thermistor moorings and satellite inferred temperature data record the outcropping of this cool water following upwelling-favourable wind stresses. The upwelling circulation provides an efficient mechanism for the periodic delivery of cool (c. <15°C), nutrient rich (NOx- N >80 µg litre–1 ) water to the coastal zone during spring. Historical wind forcing data suggest that the wind-forced dynamics described were responsible for a major toxic algal bloom within the Bay of Plenty during 1992–93.

year: 2008

title: Operation early-bird: Investigating altered light exposure in military barracks on sleep and performance-a placebo-controlled study.

authors: Edgar, David Thomas

subjects: blue-light wavelength

abstract: The manipulation of light exposure in the evening has been shown to modulate sleep, and may be beneficial in a military setting where sleep is reported to be problematic. This study investigated the efficacy of low-temperature lighting on objective sleep measures and physical performance in military trainees. Sixty-four officer-trainees (52 male/12 female, mean ± SD age: 25 ± 5 years) wore wrist-actigraphs for 6 weeks during military training to quantify sleep metrics. Trainee 2.4-km run time and upper-body muscular-endurance were assessed before and after the training course. Participants were randomly assigned to either: low-temperature lighting (LOW, n = 19), standard-temperature lighting with a placebo "sleep-enhancing" device (PLA, n = 17), or standard-temperature lighting (CON, n = 28) groups in their military barracks for the duration of the course. Repeated-measures ANOVAs were run to identify significant differences with post hoc analyses and effect size calculations performed where indicated. No significant interaction effect was observed for the sleep metrics; however, there was a significant effect of time for average sleep duration, and small benefits of LOW when compared with CON (d = 0.41-0.44). A significant interaction was observed for the 2.4-km run, with the improvement in LOW (Δ92.3 s) associated with a large improvement when compared with CON (Δ35.9 s; p = 0.003; d = 0.95 ± 0.60), but not PLA (Δ68.6 s). Similarly, curl-up improvement resulted in a moderate effect in favour of LOW (Δ14 repetitions) compared with CON (Δ6; p = 0.063; d = 0.68 ± 0.72). Chronic exposure to low-temperature lighting was associated with benefits to aerobic fitness across a 6-week training period, with minimal effects on sleep measures.

text: Operation early-bird: Investigating altered light exposure in military barracks on sleep and performance-a placebo-controlled study. The manipulation of light exposure in the evening has been shown to modulate sleep, and may be beneficial in a military setting where sleep is reported to be problematic. This study investigated the efficacy of low-temperature lighting on objective sleep measures and physical performance in military trainees. Sixty-four officer-trainees (52 male/12 female, mean ± SD age: 25 ± 5 years) wore wrist-actigraphs for 6 weeks during military training to quantify sleep metrics. Trainee 2.4-km run time and upper-body muscular-endurance were assessed before and after the training course. Participants were randomly assigned to either: low-temperature lighting (LOW, n = 19), standard-temperature lighting with a placebo "sleep-enhancing" device (PLA, n = 17), or standard-temperature lighting (CON, n = 28) groups in their military barracks for the duration of the course. Repeated-measures ANOVAs were run to identify significant differences with post hoc analyses and effect size calculations performed where indicated. No significant interaction effect was observed for the sleep metrics; however, there was a significant effect of time for average sleep duration, and small benefits of LOW when compared with CON (d = 0.41-0.44). A significant interaction was observed for the 2.4-km run, with the improvement in LOW (Δ92.3 s) associated with a large improvement when compared with CON (Δ35.9 s; p = 0.003; d = 0.95 ± 0.60), but not PLA (Δ68.6 s). Similarly, curl-up improvement resulted in a moderate effect in favour of LOW (Δ14 repetitions) compared with CON (Δ6; p = 0.063; d = 0.68 ± 0.72). Chronic exposure to low-temperature lighting was associated with benefits to aerobic fitness across a 6-week training period, with minimal effects on sleep measures.

year: 2023-02-15

title: Māori and English textbooks designed for language learners at intermediate level: A comparison in terms of the occurrence and use of insights from research on discourse analysis

authors: Fester, Anthea

subjects: New Zealand

abstract: Over the past two decades, research in the area of discourse analysis has expanded rapidly and has yielded insights that could usefully inform the teaching and learning of languages. In this paper, we report on the results of a comparative study of a number of commercially available textbooks designed for learners of English and learners of te reo Māori at intermediate level in terms of the extent to which they can be shown to have been influenced by specific aspects of discourse analysis research. In the textbooks designed for learners of English, there is some evidence that the writers are aware of, and have been influenced by some aspects of discourse analysis research, particularly in the teaching of writing skills. In the textbooks designed for learners of te reo Māori, however, there is almost no sign of influence of research of this type. In view of the importance of the teaching and learning of te reo Māori in relation to the maintenance of the language, and in view of the fact that many young people in New Zealand now learn a range of academic subjects through the medium of te reo Māori, this raises issues that we believe need to be addressed.

text: Māori and English textbooks designed for language learners at intermediate level: A comparison in terms of the occurrence and use of insights from research on discourse analysis Over the past two decades, research in the area of discourse analysis has expanded rapidly and has yielded insights that could usefully inform the teaching and learning of languages. In this paper, we report on the results of a comparative study of a number of commercially available textbooks designed for learners of English and learners of te reo Māori at intermediate level in terms of the extent to which they can be shown to have been influenced by specific aspects of discourse analysis research. In the textbooks designed for learners of English, there is some evidence that the writers are aware of, and have been influenced by some aspects of discourse analysis research, particularly in the teaching of writing skills. In the textbooks designed for learners of te reo Māori, however, there is almost no sign of influence of research of this type. In view of the importance of the teaching and learning of te reo Māori in relation to the maintenance of the language, and in view of the fact that many young people in New Zealand now learn a range of academic subjects through the medium of te reo Māori, this raises issues that we believe need to be addressed.

year: 2007-11-21