title: Navigating the noise: evaluating the occurence of vessels and cetaceans within tamatea/dusky sound

authors: Bassett, Oliver

subjects: marine acoustics

abstract: Vessel use associated with recreation and tourism is currently increasing without limits in Dusky Sound. Passive acoustic monitoring was used to investigate spatiotemporal presence and potential cooccurrence of vessels with the endangered resident subpopulation of Fiordland bottlenose dolphins (Tursiops truncatus) and migratory humpback whales (Megaptera novaeangliae) within Tamatea/Dusky Sound, Fiordland Marine Area (FMA). Hydrophones were deployed between February 2022 and November 2023 at three recording sites to collect soundscape data within Dusky Sound. The internal coastline of Five Fingers Peninsula, inside Taumoana Marine Reserve, was identified as a previously unrecognised area of significant usage for Fiordland bottlenose dolphins. Detected humpback whale presence coincided with peaks in migration, and though identified by previous visual surveying efforts, the extent of their presence in the area during their northward migration was previously unreported. Humpback whale presence was significantly higher in June compared with other months, which is consistent with their described increased vocalisation behaviour during the northward migration. 

Vessel presence detected by passive acoustic monitoring was primarily dictated by usage patterns of tourism and recreational vessels and was greatest in the channel south of Anchor Island, a highly utilised access into Dusky Sound from the outer coast. Monthly equivalent continuous sound levels (LEqs), produced using Automatic Identification System vessel records and sound propagation modelling, illustrated that sound exposure levels regularly reached ~150 dB re 1 µPa2.s within the study area. Cruise ship transits were the major contributor to these high levels, with noise levels exceeding the recommended behavioural exposure threshold for continuous sound in much of the area during the late spring and summer months. Proactive management strategies including vessel limits, speed restrictions (slowdowns) and exclusion zones (dolphin protection zones) are likely required in the future to protect these species before the potential impacts from increased tourism is seen in Tamatea/Dusky Sound.

text: Navigating the noise: evaluating the occurence of vessels and cetaceans within tamatea/dusky sound Vessel use associated with recreation and tourism is currently increasing without limits in Dusky Sound. Passive acoustic monitoring was used to investigate spatiotemporal presence and potential cooccurrence of vessels with the endangered resident subpopulation of Fiordland bottlenose dolphins (Tursiops truncatus) and migratory humpback whales (Megaptera novaeangliae) within Tamatea/Dusky Sound, Fiordland Marine Area (FMA). Hydrophones were deployed between February 2022 and November 2023 at three recording sites to collect soundscape data within Dusky Sound. The internal coastline of Five Fingers Peninsula, inside Taumoana Marine Reserve, was identified as a previously unrecognised area of significant usage for Fiordland bottlenose dolphins. Detected humpback whale presence coincided with peaks in migration, and though identified by previous visual surveying efforts, the extent of their presence in the area during their northward migration was previously unreported. Humpback whale presence was significantly higher in June compared with other months, which is consistent with their described increased vocalisation behaviour during the northward migration. 

Vessel presence detected by passive acoustic monitoring was primarily dictated by usage patterns of tourism and recreational vessels and was greatest in the channel south of Anchor Island, a highly utilised access into Dusky Sound from the outer coast. Monthly equivalent continuous sound levels (LEqs), produced using Automatic Identification System vessel records and sound propagation modelling, illustrated that sound exposure levels regularly reached ~150 dB re 1 µPa2.s within the study area. Cruise ship transits were the major contributor to these high levels, with noise levels exceeding the recommended behavioural exposure threshold for continuous sound in much of the area during the late spring and summer months. Proactive management strategies including vessel limits, speed restrictions (slowdowns) and exclusion zones (dolphin protection zones) are likely required in the future to protect these species before the potential impacts from increased tourism is seen in Tamatea/Dusky Sound.

year: 2024

title: The Forgotten Password: A Solution to Selecting, Securing and Remembering Passwords

authors: Filmer-Clark, Tracy Jane

subjects: Password

abstract: Internet passwords are required of us more and more. Personal experience
and research shows us that it is difficult to create and remember unique passwords
that meet security requirements. This study tested a unique method of password
generation based on a selection of mnemonic aids aimed at increasing the
usability, security and memorability of passwords. Fifty-one engineers,
accountants and university students aged between 17 - 61 years participated in the
study. They were randomly assigned to one of three groups: mnemonic, self-selection
and random. All passwords in the study had to meet the following
criteria: they had to be unique, at least eight characters long with a mixture of
letters and numbers, and not include complete words or personal identifiers,
sequential or repetitive numbers, and the passwords could not be written down or
recorded anywhere. The mnemonic group created passwords based on a variety of mnemonic processes, the self-selection group generated passwords that complied with the 
above criteria, and the random group were assigned random
passwords generated by the experimenter. Password recall was tested online once
a week for three weeks, and then the passwords were renewed, with participants
staying within the same groups for the length of the study. The second password
was tested weekly for three weeks, then the passwords were renewed for the third
and final time and tested for a further three weeks. The expectation was that the
use of mnemonics in password creation would improve accurate recall of
passwords, more so than if the password was 'self-selected' or a random password
was assigned. The results showed that participants in the mnemonic group were
able to accurately recall all three passwords significantly more often than
participants in the self-selection and random groups. Furthermore, passwords
created by the mnemonic group were more secure than passwords created by the
self-selection group, as their passwords generated had a greater number of
characters in them, slightly larger alphabet size, and a higher degree of entropy.
The results are discussed in terms of the practical relevance of the findings.

text: The Forgotten Password: A Solution to Selecting, Securing and Remembering Passwords Internet passwords are required of us more and more. Personal experience
and research shows us that it is difficult to create and remember unique passwords
that meet security requirements. This study tested a unique method of password
generation based on a selection of mnemonic aids aimed at increasing the
usability, security and memorability of passwords. Fifty-one engineers,
accountants and university students aged between 17 - 61 years participated in the
study. They were randomly assigned to one of three groups: mnemonic, self-selection
and random. All passwords in the study had to meet the following
criteria: they had to be unique, at least eight characters long with a mixture of
letters and numbers, and not include complete words or personal identifiers,
sequential or repetitive numbers, and the passwords could not be written down or
recorded anywhere. The mnemonic group created passwords based on a variety of mnemonic processes, the self-selection group generated passwords that complied with the 
above criteria, and the random group were assigned random
passwords generated by the experimenter. Password recall was tested online once
a week for three weeks, and then the passwords were renewed, with participants
staying within the same groups for the length of the study. The second password
was tested weekly for three weeks, then the passwords were renewed for the third
and final time and tested for a further three weeks. The expectation was that the
use of mnemonics in password creation would improve accurate recall of
passwords, more so than if the password was 'self-selected' or a random password
was assigned. The results showed that participants in the mnemonic group were
able to accurately recall all three passwords significantly more often than
participants in the self-selection and random groups. Furthermore, passwords
created by the mnemonic group were more secure than passwords created by the
self-selection group, as their passwords generated had a greater number of
characters in them, slightly larger alphabet size, and a higher degree of entropy.
The results are discussed in terms of the practical relevance of the findings.

year: 2008

title: Volunteering at the edge of chaos: A case study on the self-organising of younger volunteers during the Rena oil spill crisis

authors: Lockwood, Sarah Jane

subjects: volunteer

abstract: This thesis investigates the self-organising of younger volunteers during the 2011 Rena oil spill crisis in Aotearoa/New Zealand. It builds on emerging research that considers the relationships between volunteering and activism and focuses on the ways in which younger volunteers carved out a ‘volunteer-activist’ space for themselves on the edge of the formal crisis responses.  
The research adopts a case study approach and uses an interpretive lens to investigate three research questions: (1) How was volunteering conceptualised by younger volunteers involved in the Rena crisis?; (2) How did the generational dynamics of younger volunteers affect the various organising responses to the Rena event?; and, (3) How was self-organising conceptualised by younger volunteers involved in the Rena crisis?
The data comprised interviews with 53 participants, 38 of whom were classified as younger volunteers (16-29 years of age) and 15 who held positions of authority in the Rena crisis response and who had high levels of engagement with the younger volunteers. By examining the intersections and overlaps of self-organising, younger generations of volunteers, and crisis events through a social constructionist methodology combined with an interpretive lens and reflexive position, the thesis makes several theoretical and practical contributions.
At a theoretical level, the thesis challenges traditional crisis management approaches dominated by command and control, formal, or top down organisational structures and arrangements. The thesis demonstrates how, as active members of society, younger volunteers developed alternate forms of participation to strengthen crisis response. 
Power tensions between younger volunteers and crisis officials were grounded in a deep sense of frustration resulting from negative societal views toward younger generational cohorts and the structural workings of a risk society. By reconciling social and institutional grievances through self-organising, younger volunteers could take advantage of their marginalised position and enact self-reflexive responses in ways that were not readily available to them in everyday life. This sense of empowerment helped younger volunteers navigate the structural uncertainties they faced as they transitioned towards a competitive labour market and also to take greater control of their lives during a crisis.
From an Aotearoa/New Zealand, perspective, the thesis also provides insights into how younger Māori participants made sense of and enacted their ‘volunteer’ experience and how this experience was influenced by culturally embedded principles. Importantly, there appeared to be no generational differences between how younger and older Māori participants made sense of their ‘volunteer’ experience. Both groups were driven by collectivist orientations, which highlights the importance of contextualising culture in volunteer sector research. 
The social constructedness of the media technologies used by participants exposed broader power structures that existed within their generation-specific social worlds. To this end, media multiplexity showed how use of different communication technologies (1) supported the maintenance of relationships between participants and (2) was fundamental to the meaning participants attached to the different forms of technologies. These findings indicate the need to move away from the current literature’s focus on the tools of communication technologies used by younger people during crisis events, towards the meanings that exist behind the use of such technologies as well as the digital relationships fostered among volunteers. 
This thesis contributes to the scholarship on volunteering and activism by showing how self-organising emerged as an alternative form of activist—or activator—approach to volunteer participation within a crisis response. This approach enabled young volunteer-activators to move beyond their perceived sense of marginalisation and avoid those formal organisational forces that limit their sense of freedom and personal development. The result was an alternative crisis response of self-organised volunteering on the edge of chaos.

text: Volunteering at the edge of chaos: A case study on the self-organising of younger volunteers during the Rena oil spill crisis This thesis investigates the self-organising of younger volunteers during the 2011 Rena oil spill crisis in Aotearoa/New Zealand. It builds on emerging research that considers the relationships between volunteering and activism and focuses on the ways in which younger volunteers carved out a ‘volunteer-activist’ space for themselves on the edge of the formal crisis responses.  
The research adopts a case study approach and uses an interpretive lens to investigate three research questions: (1) How was volunteering conceptualised by younger volunteers involved in the Rena crisis?; (2) How did the generational dynamics of younger volunteers affect the various organising responses to the Rena event?; and, (3) How was self-organising conceptualised by younger volunteers involved in the Rena crisis?
The data comprised interviews with 53 participants, 38 of whom were classified as younger volunteers (16-29 years of age) and 15 who held positions of authority in the Rena crisis response and who had high levels of engagement with the younger volunteers. By examining the intersections and overlaps of self-organising, younger generations of volunteers, and crisis events through a social constructionist methodology combined with an interpretive lens and reflexive position, the thesis makes several theoretical and practical contributions.
At a theoretical level, the thesis challenges traditional crisis management approaches dominated by command and control, formal, or top down organisational structures and arrangements. The thesis demonstrates how, as active members of society, younger volunteers developed alternate forms of participation to strengthen crisis response. 
Power tensions between younger volunteers and crisis officials were grounded in a deep sense of frustration resulting from negative societal views toward younger generational cohorts and the structural workings of a risk society. By reconciling social and institutional grievances through self-organising, younger volunteers could take advantage of their marginalised position and enact self-reflexive responses in ways that were not readily available to them in everyday life. This sense of empowerment helped younger volunteers navigate the structural uncertainties they faced as they transitioned towards a competitive labour market and also to take greater control of their lives during a crisis.
From an Aotearoa/New Zealand, perspective, the thesis also provides insights into how younger Māori participants made sense of and enacted their ‘volunteer’ experience and how this experience was influenced by culturally embedded principles. Importantly, there appeared to be no generational differences between how younger and older Māori participants made sense of their ‘volunteer’ experience. Both groups were driven by collectivist orientations, which highlights the importance of contextualising culture in volunteer sector research. 
The social constructedness of the media technologies used by participants exposed broader power structures that existed within their generation-specific social worlds. To this end, media multiplexity showed how use of different communication technologies (1) supported the maintenance of relationships between participants and (2) was fundamental to the meaning participants attached to the different forms of technologies. These findings indicate the need to move away from the current literature’s focus on the tools of communication technologies used by younger people during crisis events, towards the meanings that exist behind the use of such technologies as well as the digital relationships fostered among volunteers. 
This thesis contributes to the scholarship on volunteering and activism by showing how self-organising emerged as an alternative form of activist—or activator—approach to volunteer participation within a crisis response. This approach enabled young volunteer-activators to move beyond their perceived sense of marginalisation and avoid those formal organisational forces that limit their sense of freedom and personal development. The result was an alternative crisis response of self-organised volunteering on the edge of chaos.

year: 2019