title: Full 2-port vector-corrected network analyzer in the acoustic domain

authors: MacDonell, Marcus Scott Glengarry

abstract: This manuscript presents the theory and design of a Vector-corrected Network Analyzer (VNA) realized in the acoustic domain. This is a novel measurement instrument based on the established microwave vector network analyzer. It employs directional couplers to separate forward and reverse traveling waves in acoustic waveguide. This instrument is intended to supersede the acoustic impedance tube. Advantages include greatly increased measurement speed and potential for traceability to external standards. Traceability is achieved by means of a calibration through an analytical solution of the error matrix produced from the measurement of a limited number of available acoustic standards. Operation is verified through analysis of the acoustic S-parameters of a passive, asymmetrical, reciprocal acoustic device constructed inside the acoustic waveguide. To the best of our knowledge this Acoustic Vector-corrected Network Analyzer (AVNA) is the first of its kind.

text: Full 2-port vector-corrected network analyzer in the acoustic domain This manuscript presents the theory and design of a Vector-corrected Network Analyzer (VNA) realized in the acoustic domain. This is a novel measurement instrument based on the established microwave vector network analyzer. It employs directional couplers to separate forward and reverse traveling waves in acoustic waveguide. This instrument is intended to supersede the acoustic impedance tube. Advantages include greatly increased measurement speed and potential for traceability to external standards. Traceability is achieved by means of a calibration through an analytical solution of the error matrix produced from the measurement of a limited number of available acoustic standards. Operation is verified through analysis of the acoustic S-parameters of a passive, asymmetrical, reciprocal acoustic device constructed inside the acoustic waveguide. To the best of our knowledge this Acoustic Vector-corrected Network Analyzer (AVNA) is the first of its kind.

year: 2022

title: Flexible work arrangements, work engagement, turnover intentions and psychological health

authors: Timms, Carolyn

subjects: flexible work arrangements

abstract: Flexible work arrangements (FWAs) are often written into company policies to demonstrate organisational sensitivity to potentially difficult interfaces between employees' work and non-work domains. The current research investigated employees' use of FWAs and relationship to work engagement, with turnover intentions and psychological strain also used as criterion variables for comparison purposes. A heterogeneous sample of Australian employees (N = 823) responded to two waves of data collection separated by a 12-month interval. It was expected that supportive aspects of organisational culture would be consistent with increased employee utilisation of FWAs, high work engagement, low turnover and low levels of psychological strain, and the opposite would be found for hindering aspects of organisational culture. It was also expected that supportive organisational culture would demonstrate an enduring effect over time. In general, research findings supported these hypotheses. However, the research also identified a negative relationship between use of FWAs and work engagement over time. This suggests that take-up of FWAs is highly dependent on workplace cultural norms. The implications of these results are discussed.

text: Flexible work arrangements, work engagement, turnover intentions and psychological health Flexible work arrangements (FWAs) are often written into company policies to demonstrate organisational sensitivity to potentially difficult interfaces between employees' work and non-work domains. The current research investigated employees' use of FWAs and relationship to work engagement, with turnover intentions and psychological strain also used as criterion variables for comparison purposes. A heterogeneous sample of Australian employees (N = 823) responded to two waves of data collection separated by a 12-month interval. It was expected that supportive aspects of organisational culture would be consistent with increased employee utilisation of FWAs, high work engagement, low turnover and low levels of psychological strain, and the opposite would be found for hindering aspects of organisational culture. It was also expected that supportive organisational culture would demonstrate an enduring effect over time. In general, research findings supported these hypotheses. However, the research also identified a negative relationship between use of FWAs and work engagement over time. This suggests that take-up of FWAs is highly dependent on workplace cultural norms. The implications of these results are discussed.

year: 2014

title: Student voice and agency for Indigenous Maori students in higher education transitions

authors: Amundsen, Diana Leigh

subjects: Social Sciences

abstract: This article reveals the complexities of Indigenous students navigating the neoliberal model of education through an examination of Māori transitions into higher education contexts in Aotearoa New Zealand. In a recently completed doctoral study, the lived transition experiences of Indigenous Māori higher education students were critically investigated from a student voice perspective. Data were collected and analysed through repeated semi-structured interviews, focus groups and visual stories in a semi-longitudinal study with 20 Māori students enrolled in a wānanga, a polytechnic and a university. Using a Bourdieuan theoretical framework for analysis, findings revealed that participants experienced their transition as a journey. Students perpetually evolved their identities and agency in relation to the tertiary education environments and social structures they encountered which supported or constrained transition experiences. Within wānanga, participants felt their Māori cultural identity was highly valued; within polytechnics, there was a sense that Māori culture is included but more could be done; within universities, a need for more inclusive practices to support Māori learner requirements was identified. This empirical research outlines learning for Māori students in higher education, and is a timely addition to knowledge revealing the complexities of teaching in the neoliberal model of higher education with Indigenous people.

text: Student voice and agency for Indigenous Maori students in higher education transitions This article reveals the complexities of Indigenous students navigating the neoliberal model of education through an examination of Māori transitions into higher education contexts in Aotearoa New Zealand. In a recently completed doctoral study, the lived transition experiences of Indigenous Māori higher education students were critically investigated from a student voice perspective. Data were collected and analysed through repeated semi-structured interviews, focus groups and visual stories in a semi-longitudinal study with 20 Māori students enrolled in a wānanga, a polytechnic and a university. Using a Bourdieuan theoretical framework for analysis, findings revealed that participants experienced their transition as a journey. Students perpetually evolved their identities and agency in relation to the tertiary education environments and social structures they encountered which supported or constrained transition experiences. Within wānanga, participants felt their Māori cultural identity was highly valued; within polytechnics, there was a sense that Māori culture is included but more could be done; within universities, a need for more inclusive practices to support Māori learner requirements was identified. This empirical research outlines learning for Māori students in higher education, and is a timely addition to knowledge revealing the complexities of teaching in the neoliberal model of higher education with Indigenous people.

year: 2019