title: Good intermediate-rank lattice rules based on the weighted star discrepancy

authors: Sinescu, Vasile

subjects: mathematics

abstract: We study the problem of constructing good intermediate-rank lattice rules in the sense of having a low weighted star discrepancy. The intermediate-rank rules considered here are obtained by “copying” rank-1 lattice rules. We show that such rules can be constructed using a component-by-component technique and prove that the bound for the weighted star discrepancy achieves the optimal convergence rate.

text: Good intermediate-rank lattice rules based on the weighted star discrepancy We study the problem of constructing good intermediate-rank lattice rules in the sense of having a low weighted star discrepancy. The intermediate-rank rules considered here are obtained by “copying” rank-1 lattice rules. We show that such rules can be constructed using a component-by-component technique and prove that the bound for the weighted star discrepancy achieves the optimal convergence rate.

year: 2006

title: Determinants of timing performance on the peak procedure

authors: McHugh, Mark Edward

abstract: The performance of brown shaver hens gallus gallus domesticus, was investigated using a peak procedure as a method to examine the timing abilities of an animal. Peak procedure involves using a combination of peak interval and fixed interval trials, where the peak intervals are four to 10 times long than the FI. Responses during the longer PI trials are not reinforced and do not require a response to end the trial. The Peak procedure generates a pattern of responding that increases to a maximum at the time where behaviour is normally reinforced. The research was conducted on six domestic hens, which underwent FI schedule pretraining and then were introduced to peak testing, FI 20-s/PI 200-s, FI 40/PI 400-s and FI 20-s/PI 80-s schedules. The First 3 condition involved FI 20-s PI 200-s and FI 40-s and PI 400-s schedules, with no house light on during the sessions. The distribution showed a peak at or near the expected time to reinforcement, followed by a steady decrease in responding. The extended period of the trials showed a resonances pattern of responding during the remainder of the trial, with some birds showing resurgence. Condition 7 used FI 20 PI 200-s schedules with a houselight turn on for the whole duration. The response rate increased to the highest point at or near the expected time of reinforcement for all birds, followed by a decrease in responding to a minimum of 1 peck per second. The remainder of the trial displayed a resonances pattern of responding, with half the birds showing resurgences. Condition 8 used FI 20-s PI 200-s schedules with a houselight on during the trial and ITI and off during reinforcement. Patterns of responding were similar to what was seen in the previous conditions. The final condition used FI 20-s PI 80-s schedules with a houselight on during the trial and ITI and off during reinforcement. Responding was similar to the previous conditions with an increase in responding reaching a maximum at or near the expected time to reinforcement and a decrease followed by a resonances pattern of responding for the duration of the trial.

text: Determinants of timing performance on the peak procedure The performance of brown shaver hens gallus gallus domesticus, was investigated using a peak procedure as a method to examine the timing abilities of an animal. Peak procedure involves using a combination of peak interval and fixed interval trials, where the peak intervals are four to 10 times long than the FI. Responses during the longer PI trials are not reinforced and do not require a response to end the trial. The Peak procedure generates a pattern of responding that increases to a maximum at the time where behaviour is normally reinforced. The research was conducted on six domestic hens, which underwent FI schedule pretraining and then were introduced to peak testing, FI 20-s/PI 200-s, FI 40/PI 400-s and FI 20-s/PI 80-s schedules. The First 3 condition involved FI 20-s PI 200-s and FI 40-s and PI 400-s schedules, with no house light on during the sessions. The distribution showed a peak at or near the expected time to reinforcement, followed by a steady decrease in responding. The extended period of the trials showed a resonances pattern of responding during the remainder of the trial, with some birds showing resurgence. Condition 7 used FI 20 PI 200-s schedules with a houselight turn on for the whole duration. The response rate increased to the highest point at or near the expected time of reinforcement for all birds, followed by a decrease in responding to a minimum of 1 peck per second. The remainder of the trial displayed a resonances pattern of responding, with half the birds showing resurgences. Condition 8 used FI 20-s PI 200-s schedules with a houselight on during the trial and ITI and off during reinforcement. Patterns of responding were similar to what was seen in the previous conditions. The final condition used FI 20-s PI 80-s schedules with a houselight on during the trial and ITI and off during reinforcement. Responding was similar to the previous conditions with an increase in responding reaching a maximum at or near the expected time to reinforcement and a decrease followed by a resonances pattern of responding for the duration of the trial.

year: 2012

title: Māori & Psychology Research Unit annual report 2010

authors: Rua, Mohi

subjects: Māori and Psychology Research Unit

abstract: Annual report of the Māori and Psychology Research Unit (MPRU) 2010. The unit was established in August of 1997. The unit is designed to provide a catalyst and support network for enhancing research concerning the psychological needs, aspirations, and priorities of Maori people. The MPRU is well situated to draw together skilled and experienced interdisciplinary research groups by networking and establishing working relationships with staff and students within the Faculty of Arts and Social Sciences, the University, and the wider community.

text: Māori & Psychology Research Unit annual report 2010 Annual report of the Māori and Psychology Research Unit (MPRU) 2010. The unit was established in August of 1997. The unit is designed to provide a catalyst and support network for enhancing research concerning the psychological needs, aspirations, and priorities of Maori people. The MPRU is well situated to draw together skilled and experienced interdisciplinary research groups by networking and establishing working relationships with staff and students within the Faculty of Arts and Social Sciences, the University, and the wider community.

year: 2011