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    Co-selection of Heavy Metal and Antibiotic Resistance in Soil Bacteria from Agricultural Soils in New Zealand
    (MDPI (Basel, Switzerland), 2022-02-04) Heydari A; Kim ND; Horswell J; Gielen G; Siggins A; Taylor M; Bromhead C; Palmer BR
    Accumulation of trace elements (including heavy metals) in soil from usage of superphos-phate fertilisers induces resistance of soil bacteria to trace elements of environmental concern (TE-oEC) and may co‐select for resistance to antibiotics (Ab). This study aimed to investigate selection of co‐resistance of soil bacteria to Cd, Zn and Hg, and Ab in soils with varied management histories. Genetic diversity of these bacteria and horizontal transfer of Cd resistance genes (cadA and czcA) were also investigated. Soils with either pastoral and arable management histories and either high levels of Cd and Zn, or indigenous bush with background levels of these TEoEC from the Waikato region, New Zealand were sampled. Plate culturing with a range of TEoEC and Ab concentrations, Pollution Induced Community Tolerance (PICT) assay, antibiotic sensitivity, terminal restriction fragment length polymorphism (TRFLP) and horizontal gene transfer (HGT) analyses were em-ployed to investigate co‐selection of TEoEC and Ab resistance. Higher levels of bacterial resistance to TEoEC and Ab correlated with higher levels of TEoEC in soil. Bacterial community structures were altered in soils with high TEoEC levels. Cd resistance genes were transferred from donor bacterial isolates, to recipients and the transconjugants also had resistance to Zn and/or Hg and a range of Ab.
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    Less Food Wasted? Changes to New Zealanders' Household Food Waste and Related Behaviours Due to the 2020 COVID-19 Lockdown
    (MDPI (Basel, Switzerland), 2021-09-07) Sharp EL; Haszard J; Egli V; Roy R; Te Morenga L; Teunissen L; Decorte P; Cuykx I; De Backer C; Gerritsen S
    Food waste is a crisis of our time, yet it remains a data gap in Aotearoa New Zealand’s (NZ’s) environmental reporting. This research contributes to threshold values on NZ’s food waste and seeks to understand the impact of the 2020 COVID-19 lockdown on household food waste in NZ. The data presented here form part of the ‘Covid Kai Survey’, an online questionnaire that assessed cooking and food planning behaviours during the 2020 lockdown and retrospectively before lockdown. Of the 3028 respondents, 62.5% threw out food ‘never’/‘rarely’ before lockdown, and this number increased to 79.0% during lockdown. Participants who wasted food less frequently during lockdown were more likely to be older, work less than full-time, and have no children. During lockdown, 30% and 29% of those who ‘frequently’ or ‘sometimes’ struggled to have money for food threw out food ‘sometimes or more’; compared with 20% of those who rarely struggled to have money for food (p < 0.001). We found that lower levels of food waste correlated with higher levels of cooking confidence (p < 0.001), perceived time (p < 0.001), and meal planning behaviours (p < 0.001). Understanding why food waste was generally considerably lower during lockdown may inform future initiatives to reduce food waste, considering socio-economic and demographic disparities.
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    Occupants’ Decision-Making of Their Energy Behaviours in Office Environments: A Case of New Zealand
    (1/02/2023) Weerasinghe AS; Rasheed EO; Rotimi JOB
    Understanding how occupants behave and interact with building systems is vital to energy efficiency in buildings. The building occupants’ behaviours are complex and influenced by diverse factors. A deep understanding of the underlying environmental, contextual, social, and psychological factors is the first step of many in establishing the relationship between the indoor environment and occupants’ behaviours. The current study investigates the influence of occupants’ perceived indoor environmental comfort, the availability of control, and the social-psychological impacts on occupant behaviours in a New Zealand context. The data were collected through online surveys, and 99 office occupants responded. A machine learning technique was applied to identify the critical factors influencing the decision-making of occupant behaviours. Of the occupant behaviours considered in the study, adjusting windows, doors, shades and blinds, and drinking beverages were mostly practised (>70%) while adjusting lighting, personal fans, thermostats/heaters, and computers (40–70%) was moderately practised by occupants. The availability of specific user controls was the main predictor of most occupant behaviours, followed by social-psychological factors such as actual knowledge, perceived knowledge, behavioural interventions, subjective norms, organisational support, personal norms, attitudes, and perceived behavioural control. The indoor environmental parameters such as indoor temperature, indoor air quality, natural light, and inside noise were highlighted as most influential in decision-making for occupant behaviours. Additionally, the demographic factors: gender, work duration, days at work, and permanence/temporariness of workspace, were also impactful. Knowing the complexity of occupants’ decision-making with respect to their behaviours helps building managers use this sensitive information to enhance building energy performance and enable more energy feedback to the occupants to raise their awareness. Such information is helpful for creating an intelligent environmental control system loop with eco-feedback and establishing occupant-centric buildings or features.
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    Increasing Supply for Woody-Biomass-Based Energy through Wasted Resources: Insights from US Private Landowners
    (MDPI AG, 23/05/2023) Nguyen T
    Woody biomass is suggested as a substitute for fossil fuels to achieve sustainable development. However, transitioning the land purpose to produce woody biomass entails investment and a tradeoff between wood pellet production and the current utilities created by the land, hindering the willingness of private landowners. To many forest landowners, forest trees and residues considered unprofitable to transport would be left in the forest without other proper use. The wasted woody resources on the land can be a potential source to increase the woody biomass supply. To support the policymakers, logging companies, state agencies, and landowners to better capitalize on these wasted resources, we aimed to identify the characteristics of woody-resource-wasting landowners and examine how to increase their likelihood to contribute to woody-biomass-based energy. By employing Bayesian Mindsponge Framework (BMF) analytics on a dataset of 707 private landowners in the United States (US), we discovered that landowners being male, having higher income, and being a member of a state/national forestry organization were more likely to waste woody resources. Moreover, woody-resource-wasting landowners perceiving woody-biomass-based energy as a substitution for fossil fuel were more likely to sell wood. In contrast, those perceiving environmental costs over the benefits of woody-biomass-based energy were less likely to sell. These findings can be used as insights for policymakers, logging companies, and state agencies to find an additional supply of woody-biomass-based energy from landowners likely to waste woody resources.
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    Perceptions of Cultivated Meat in Millennial and Generation X Consumers Resident in Aotearoa New Zealand
    (1/03/2023) Giezenaar C; Godfrey AJR; Ogilvie OJ; Coetzee P; Weerawarna N.R.P M; Foster M; Hort J
    Evidence suggests that consumer perceptions and acceptance of cultivated meat (CM) differ between countries, cultures, and consumer groups. Limited research specific to Aotearoa New Zealand (A-NZ) is available. Survey responses from 592 A-NZ residents were analysed to determine CM awareness, willingness to engage with CM, and perceived CM product attributes relative to conventional meat and plant-based meat alternatives (PBMAs). The effects of gender, age, meat/PBMA consumption frequency, CM awareness, and food neophobia on CM perceptions were determined. The statements were rated on a seven-point Likert scale. Half (52%) of the respondents agreed they were aware of CM. The awareness was higher in men compared to women (p = 0.036), higher in Millennials compared to Generation X (p = 0.022), and higher in regular compared to infrequent PBMA consumers (p = 0.0003). The willingness to engage with CM and perceived CM product attributes were consistently more positive in consumers who were aware, compared with consumers not aware of CM (p < 0.05). Being male, Millennial, low neophobic and a low meat, or high PBMA consumer was also associated with higher potential engagement and perceptions of CM to varying extents. Segmentation divided the respondents into three groups. The ‘positive’ cluster (41%) consumed more PBMAs and less meat and was more aware of CM than the ‘neutral’ (50%) and ‘negative’ (9%) clusters. In conclusion, consumers in A-NZ are not a homogenous group with regards to their perceptions and potential engagement with CM. Increasing awareness and familiarity with CM will be an important strategy to increase engagement with CM.
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    Sustaining construction organisations in NZ: A linear regression model approach to analysing determinants of their performance
    (MDPI AG, 2023) Alqudah HE; Poshdar M; Oyewobi LO; Rotimi JOB; Tookey J
    The characteristics, strategies, capabilities, and resources of an organisation contribute to its competitive advantage and superior performance. A model to explain performance differences in the New Zealand context will be developed by examining the relationships between construction organisational performance and these constructs. The information was obtained using a questionnaire survey. A total of 101 organisations participated in the research. For the instrument used to elicit data, the literature was used to identify indicators associated with characteristics of organisational strategies for competition, resources and capabilities, and performance of the organisation. Analyses of descriptive, parametric, and linear regression were conducted to examine the effects of these constructs on organisational performance. The results suggest that organisational characteristics are significantly associated with internal business processes, learning, and the growth perspectives of an organisation’s performance, while competitive strategies, resources, and capability perspectives are significantly related to financial perspectives. As a result, these findings add to the current discourse regarding organisational performance differentials in the construction industry. The study demonstrates that it is critical to take into account the different organisational characteristics that are implemented within organisations and how they influence organisational performance beyond rational processes.
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    Productivity, profitability and nitrogen utilisation efficiency of two pasture-based milk production systems differing in the milking frequency and feeding level
    (2/02/2021) Correa-Luna M; Donaghy D; Kemp P; Shalloo L; Ruelle E; Hennessy D; López-Villalobos N
    The aim of this study was to model the productivity, profitability and the nitrogen (N) utilisation efficiency (NUE) of two spring-calving pasture-based milk production systems differing in milking frequency and intensification levels in New Zealand. For this purpose, physical performance data from a low-intensity production system where cows were milked once per day (OAD-LI) and from a high-intensity production system where cows were milked twice per day (TAD-HI) were employed. OAD-LI cows were milked once-daily with a stocking rate (SR) of 2.1 cows/ha and fed diets with low supplementation (304 kg pasture silage/cow) with applications of 134 kg N fertiliser/ha and TAD-HI cows were milked twice-daily with a SR of 2.8 cows/ha and fed diets of higher supplementation (429 kg pasture silage and 1695 kg concentrate/cow) with applications of 87 kg N fertiliser/ha. The Moorepark Dairy System Model was used to evaluate production, economic performance and N balance on an annual basis. Despite the higher feed costs of TAD-HI as more supplementation was utilised, profitability per hectare was 16% higher because more cows were milked with a higher milk yield per cow (milking frequency) when compared to OAD-LI. At the cow level, the NUE was higher in TAD-HI (30% vs. 27%) reflecting the better balanced diet for energy and crude protein and higher milk yields as a result of milking frequency. At the farm scale the NUE was higher (38% vs. 26%) in the TAD-HI due to the losses associated with the imported feed being excluded and higher N captured in milk. These results suggest that milking frequency, the use of feed supplementation and application of N fertiliser as management tools on grazing dairy systems affect productivity, profitability and N balance. Further studies are required to find optimal stocking rates in combination with the use of supplementary feed and N fertiliser application that maximize milk production and profitability for OAD and TAD milking production systems but minimize N losses.
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    Investigating the theoretical constructs of a green lean six sigma approach towards environmental sustainability: A systematic literature review and future directions
    (MDPI (Basel, Switzerland), 7/10/2020) Farrukh A; Mathrani S; Taskin N
    Green lean six sigma (GLSS) is an emerging approach towards environmental sustainability in conjunction with operational achievements. The success of this approach is premised on an understanding of the different components of a GLSS program; being the determinants for its outcomes. The aim of this paper is to investigate the various constructs of GLSS that play an essential role in achieving environmental sustainability. For this purpose, a systematic review of available literature has been conducted to evaluate the drivers, enablers (tools), and outcomes of a GLSS strategy as well as its critical success factors and barriers. Findings reveal that these constructs of GLSS as a holistic approach can facilitate an organization to better accomplish environmental objectives such as waste minimization, emission reduction, and resource conservation as compared to constructs of only one or any two of these strategies. Based on the analysis, an integrated GLSS framework is developed for environmental sustainability in addition to identifying vital research gaps and future directions.
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    Building Information Modeling Education for Quantity Surveyors in Hong Kong: Current States, Education Gaps, and Challenges
    (1/01/2023) Keung CCW; Yiu TW; Feng Z
    Rapid developments in building information modeling (BIM) are escalating the architecture, engineering, and construction (AEC) industry toward digital transformation. However, the lack of skilled BIM professionals is a critical issue slowing this transformation. Currently, few educational institutions include BIM topics in their curricula, especially those developed for quantity surveying (QS) programs. Moreover, the learning outcomes of BIM curricula may not meet the current industrial requirements. Thus, this study investigated the current states, gaps, and challenges of BIM education for QS practices in Hong Kong. This study conducted surveys to determine industrial requirements and a case study to examine the BIM curricula currently offered at Hong Kong educational institutions. The results suggest that the current BIM education for QS practices is in line with the pace of BIM development in the AEC industry. However, some advanced topics are not covered in BIM education. Additionally, the non-standardized BIM competencies to be attained by students lead to uncertainty and challenges in BIM education for quantity surveyors.