title: Operant Methodology Out Of The Lab and Applied To Enrichment With Captive Chimpanzees (Pan Troglodytes)

authors: Vivian, Melanie

subjects: operant methodology

abstract: A group of socially-housed chimpanzees, maintained in a zoo facility, were given the opportunity to access each of several purpose-designed and built enrichment items. Each item was made freely available in the chimpanzees' regular setting, with their normal activities available. The time members of the group spent engaging with each item gave an assessment of their relative preference for the items. The group were shown to have the greatest preference for a foraging enrichment item (Screwfeeder) and the least preference for an audiovisual enrichment item (TV/Video). Individual preferences for the items were evident. The chimpanzees were then taught to operate a weighted lever to get access to an item. Once all chimpanzees had operated the lever for access to the items, the number of lever operations required for access to each item was systematically doubled over a series of 3 hr sessions until the chimpanzees did not gain any access to that item for two consecutive sessions. One item was presented for two series of increases. The group response rates for an item increased with increased response requirement and then decreased with further increases, reflecting data from individuals in other research. The highest response requirement that maintained the group behaviour differed over the items. The number of times an item was accessed (consumption) was plotted against the response requirement (price) on logarithmic coordinates. Lines fitted to the data (demand functions) were shallowest for a foraging enrichment (Screwfeeder) and steepest for the audio enrichment (Musicbox). There were not enough data points to fit a function for the audiovisual enrichment. Differences in individual's demand within the group were evident. In general, the rank order of preference for the items and the rank order based on the parameters of the demand functions (slope or elasticity and initial intensity) was broadly the same. Three individual chimpanzees were exposed to two series of increasing response requirement for access to the Screwfeeder whilst housed alone, in one hour sessions. Response rates were again bitonic and the linear demand functions for these individuals were steeper (more elastic) than the functions fitted to data for group responding and differed idiosyncratically from the data for these individual when responding as part of the group. Thus the change of social setting had a different impact on the behaviour of each of the individuals. These results show that an animals‟ demand for a commodity is altered by the environment in which it is tested.
ii
Overall the research provides the first example of operant methodology in a zoo setting with a group of chimpanzees. It is also the first research to show differential responding for access to different enrichment items by a group and how this relates to their preference (based on time allocation) for those items.

text: Operant Methodology Out Of The Lab and Applied To Enrichment With Captive Chimpanzees (Pan Troglodytes) A group of socially-housed chimpanzees, maintained in a zoo facility, were given the opportunity to access each of several purpose-designed and built enrichment items. Each item was made freely available in the chimpanzees' regular setting, with their normal activities available. The time members of the group spent engaging with each item gave an assessment of their relative preference for the items. The group were shown to have the greatest preference for a foraging enrichment item (Screwfeeder) and the least preference for an audiovisual enrichment item (TV/Video). Individual preferences for the items were evident. The chimpanzees were then taught to operate a weighted lever to get access to an item. Once all chimpanzees had operated the lever for access to the items, the number of lever operations required for access to each item was systematically doubled over a series of 3 hr sessions until the chimpanzees did not gain any access to that item for two consecutive sessions. One item was presented for two series of increases. The group response rates for an item increased with increased response requirement and then decreased with further increases, reflecting data from individuals in other research. The highest response requirement that maintained the group behaviour differed over the items. The number of times an item was accessed (consumption) was plotted against the response requirement (price) on logarithmic coordinates. Lines fitted to the data (demand functions) were shallowest for a foraging enrichment (Screwfeeder) and steepest for the audio enrichment (Musicbox). There were not enough data points to fit a function for the audiovisual enrichment. Differences in individual's demand within the group were evident. In general, the rank order of preference for the items and the rank order based on the parameters of the demand functions (slope or elasticity and initial intensity) was broadly the same. Three individual chimpanzees were exposed to two series of increasing response requirement for access to the Screwfeeder whilst housed alone, in one hour sessions. Response rates were again bitonic and the linear demand functions for these individuals were steeper (more elastic) than the functions fitted to data for group responding and differed idiosyncratically from the data for these individual when responding as part of the group. Thus the change of social setting had a different impact on the behaviour of each of the individuals. These results show that an animals‟ demand for a commodity is altered by the environment in which it is tested.
ii
Overall the research provides the first example of operant methodology in a zoo setting with a group of chimpanzees. It is also the first research to show differential responding for access to different enrichment items by a group and how this relates to their preference (based on time allocation) for those items.

year: 2008

title: Coronal heating by magnetohydrodynamic turbulence driven by reflected low-frequency waves

authors: Matthaeus, William H.

subjects: MHD

abstract: A candidate mechanism for the heating of the solar corona in open field line regions is described. The interaction of Alfvén waves, generated in the photosphere or chromosphere, with their reflections and the subsequent driving of quasi-two-dimensional MHD turbulence is considered. A nonlinear cascade drives fluctuations toward short wavelengths which are transverse to the mean field, thereby heating at rates insensitive to restrictive Alfvén timescales. A phenomenology is presented, providing estimates of achievable heating efficiency that are most favorable.

text: Coronal heating by magnetohydrodynamic turbulence driven by reflected low-frequency waves A candidate mechanism for the heating of the solar corona in open field line regions is described. The interaction of Alfvén waves, generated in the photosphere or chromosphere, with their reflections and the subsequent driving of quasi-two-dimensional MHD turbulence is considered. A nonlinear cascade drives fluctuations toward short wavelengths which are transverse to the mean field, thereby heating at rates insensitive to restrictive Alfvén timescales. A phenomenology is presented, providing estimates of achievable heating efficiency that are most favorable.

year: 1999

title: Wāhine Whaiora: Māori Women's Experiences of Bipolar Disorder and their Pathways to Recovery

authors: Harris, Parewahaika Erenora Te Korowhiti

subjects: Māori health

abstract: This research examines the unique, lived experiences of wāhine Māori (Māori women) who have been diagnosed with bipolar affective disorder and who are currently living ‘well’. Recent literature indicates that Māori present at higher rates than non-Māori with bipolar disorder. However, there is little qualitative information about the nature of their experiences, as well as sparse detail of the impacts that bipolar has on their everyday living.

The purpose of this research is to highlight Māori women’s experiences of bipolar disorder from initial presentation and assessment through to diagnosis, treatment and recovery.  It focuses on the impact bipolar disorder has on women’s relationships with their tamariki (children), whānau (family), and partners, while also exploring social and personal impacts, help-seeking patterns, and stories of recovery.
This research heard the stories of 11 wāhine Māori using a narrative-storying technique to allow wāhine to share their unique experiences as they recalled them. A thematic analysis was then used to identify key themes that depicted their journeys of:

•	Illness and symptom presentation;
•	Consequences and impacts of bipolar disorder; 
•	Support and help-seeking; and
•	Wellness and recovery.

The intent of this research is to create an awareness of the nature of bipolar disorder as it affects wāhine Māori. It endeavours to expose the experiences they have encountered and their aspirations to be better supported by whānau, and community organisations in their attempts to live active and well lives.

text: Wāhine Whaiora: Māori Women's Experiences of Bipolar Disorder and their Pathways to Recovery This research examines the unique, lived experiences of wāhine Māori (Māori women) who have been diagnosed with bipolar affective disorder and who are currently living ‘well’. Recent literature indicates that Māori present at higher rates than non-Māori with bipolar disorder. However, there is little qualitative information about the nature of their experiences, as well as sparse detail of the impacts that bipolar has on their everyday living.

The purpose of this research is to highlight Māori women’s experiences of bipolar disorder from initial presentation and assessment through to diagnosis, treatment and recovery.  It focuses on the impact bipolar disorder has on women’s relationships with their tamariki (children), whānau (family), and partners, while also exploring social and personal impacts, help-seeking patterns, and stories of recovery.
This research heard the stories of 11 wāhine Māori using a narrative-storying technique to allow wāhine to share their unique experiences as they recalled them. A thematic analysis was then used to identify key themes that depicted their journeys of:

•	Illness and symptom presentation;
•	Consequences and impacts of bipolar disorder; 
•	Support and help-seeking; and
•	Wellness and recovery.

The intent of this research is to create an awareness of the nature of bipolar disorder as it affects wāhine Māori. It endeavours to expose the experiences they have encountered and their aspirations to be better supported by whānau, and community organisations in their attempts to live active and well lives.

year: 2014