title: Analysis of ICP variants for the registration of partially overlapping time-of-flight range images

authors: Larkins, Robert L.

subjects: ICP

abstract: The iterative closest point (ICP) algorithm is one of the most commonly used methods for registering partially overlapping range images. Nevertheless, this algorithm was not originally designed for this task, and many variants have been proposed in an effort to improve its prociency. The relatively new full-field amplitude-modulated time-of-flight range imaging cameras present further complications to registration in the form of measurement errors due to mixed and scattered light. This paper investigates the effectiveness of the most common ICP variants applied to range image data acquired from full-field range imaging cameras. The original ICP algorithm combined with boundary rejection performed the same as or better than the majority of variants tested. In fact, many of these variants proved to decrease the registration alignment.

text: Analysis of ICP variants for the registration of partially overlapping time-of-flight range images The iterative closest point (ICP) algorithm is one of the most commonly used methods for registering partially overlapping range images. Nevertheless, this algorithm was not originally designed for this task, and many variants have been proposed in an effort to improve its prociency. The relatively new full-field amplitude-modulated time-of-flight range imaging cameras present further complications to registration in the form of measurement errors due to mixed and scattered light. This paper investigates the effectiveness of the most common ICP variants applied to range image data acquired from full-field range imaging cameras. The original ICP algorithm combined with boundary rejection performed the same as or better than the majority of variants tested. In fact, many of these variants proved to decrease the registration alignment.

year: 2010

title: Imua: reflections on imua, talanoa-vā and leadership in the ongoing strategic journey of a New Zealand university.

authors: Hemi, Keakaokawai Varner

abstract: The appointment of the University of Waikato’s first Assistant Vice-Chancellor Pacific in February 2019 was an important milestone, not only recognising years of work and dedication by numerous Pacific and Māori staff, but triggering a new strategic direction for ‘Pacific at Waikato’. This paper explains that journey, one that is underpinned by Pacific cultural legacies, strengths, values and identity; built on talanoa-vā; informed by research, data analytics, student and community voice; combined with strategic thought and planning; and outworked in the pan-Pacific epithet, ‘imua’. This is a story of resilience, determination, negotiating a pandemic, problem-solving and innovation in an environment that seeks a ‘culture of belonging’ and where Pacific learners are encouraged to be themselves in the pursuit of educational achievement. This paper will be of interest to education providers, stakeholders and policy makers.

text: Imua: reflections on imua, talanoa-vā and leadership in the ongoing strategic journey of a New Zealand university. The appointment of the University of Waikato’s first Assistant Vice-Chancellor Pacific in February 2019 was an important milestone, not only recognising years of work and dedication by numerous Pacific and Māori staff, but triggering a new strategic direction for ‘Pacific at Waikato’. This paper explains that journey, one that is underpinned by Pacific cultural legacies, strengths, values and identity; built on talanoa-vā; informed by research, data analytics, student and community voice; combined with strategic thought and planning; and outworked in the pan-Pacific epithet, ‘imua’. This is a story of resilience, determination, negotiating a pandemic, problem-solving and innovation in an environment that seeks a ‘culture of belonging’ and where Pacific learners are encouraged to be themselves in the pursuit of educational achievement. This paper will be of interest to education providers, stakeholders and policy makers.

year: 2021

title: Geographical and ethnic differences of osteoarthritis-associated hip and knee replacement surgeries in New Zealand: a population-based cross-sectional study

authors: Lao, Chunhuan

abstract: Objectives To (1) explore the regional and ethnic differences in rates of publicly funded osteoarthritis-associated hip and knee replacement surgeries and (2) investigate the mortality after surgery.

Design Population-based, retrospective, cross-sectional study.

Setting General population in New Zealand.

Participants Patients with osteoarthritis who underwent publicly funded primary hip and knee replacement surgeries in 2005–2017. Patients aged 14–99 years were included.

Primary and secondary outcome measures Age-standardised rate, standardised mortality ratio (SMR) and 30 days, 90 days and 1 year mortality.

Results We identified 53 439 primary hip replacements and 50 072 primary knee replacements with a diagnosis of osteoarthritis. The number and age-standardised rates of hip and knee replacements increased over time. Māori had the highest age-standardised rate of hip replacements, followed by European/others and Pacific, and Asian had the lowest rate. Pacific had the highest age-standardised rate of knee replacements, followed by Māori and European/others, and Asian had the lowest rate. The Northern Health Network had the lowest rate of hip surgeries, and the Southern Health Network had the lowest rate of knee surgeries. The SMRs of patients undergoing hip and knee replacements were lower than the general population: 0.92 (95% CI 0.89 to 0.95) for hip and 0.79 (95% CI 0.76 to 0.82) for knee. The SMRs were decreasing over time. The patterns of 30 days, 90 days and 1 year mortality were similar to the SMR.

Conclusions The numbers of publicly funded osteoarthritis-associated primary hip and knee replacements are steadily increasing. Māori people had the highest age-standardised rate of hip replacements and Pacific people had the highest rate of knee replacements. The Northern Health Network had the lowest rate of hip surgeries, and the Southern Health Network had the lowest rate of knee surgeries. Compared with the general population, patients who had hip and knee replacements have a better life expectancy.

text: Geographical and ethnic differences of osteoarthritis-associated hip and knee replacement surgeries in New Zealand: a population-based cross-sectional study Objectives To (1) explore the regional and ethnic differences in rates of publicly funded osteoarthritis-associated hip and knee replacement surgeries and (2) investigate the mortality after surgery.

Design Population-based, retrospective, cross-sectional study.

Setting General population in New Zealand.

Participants Patients with osteoarthritis who underwent publicly funded primary hip and knee replacement surgeries in 2005–2017. Patients aged 14–99 years were included.

Primary and secondary outcome measures Age-standardised rate, standardised mortality ratio (SMR) and 30 days, 90 days and 1 year mortality.

Results We identified 53 439 primary hip replacements and 50 072 primary knee replacements with a diagnosis of osteoarthritis. The number and age-standardised rates of hip and knee replacements increased over time. Māori had the highest age-standardised rate of hip replacements, followed by European/others and Pacific, and Asian had the lowest rate. Pacific had the highest age-standardised rate of knee replacements, followed by Māori and European/others, and Asian had the lowest rate. The Northern Health Network had the lowest rate of hip surgeries, and the Southern Health Network had the lowest rate of knee surgeries. The SMRs of patients undergoing hip and knee replacements were lower than the general population: 0.92 (95% CI 0.89 to 0.95) for hip and 0.79 (95% CI 0.76 to 0.82) for knee. The SMRs were decreasing over time. The patterns of 30 days, 90 days and 1 year mortality were similar to the SMR.

Conclusions The numbers of publicly funded osteoarthritis-associated primary hip and knee replacements are steadily increasing. Māori people had the highest age-standardised rate of hip replacements and Pacific people had the highest rate of knee replacements. The Northern Health Network had the lowest rate of hip surgeries, and the Southern Health Network had the lowest rate of knee surgeries. Compared with the general population, patients who had hip and knee replacements have a better life expectancy.

year: 2019