Digital Commons Network^™

Infrared Ship Segmentation Based On Weakly-Supervised And Semi-Supervised Learning, Isa Ali Ibrahim, Abdallah Namoun, Sami Ullah, Hisham Alasmary, Muhammad Waqas, Iftekhar Ahmad

Research outputs 2022 to 2026

Existing fully-supervised semantic segmentation methods have achieved good performance. However, they all rely on high-quality pixel-level labels. To minimize the annotation costs, weakly-supervised methods or semi-supervised methods are proposed. When such methods are applied to the infrared ship image segmentation, inaccurate object localization occurs, leading to poor segmentation results. In this paper, we propose an infrared ship segmentation (ISS) method based on weakly-supervised and semi-supervised learning, aiming to improve the performance of ISS by combining the advantages of two learning methods. It uses only image-level labels and a minimal number of pixel-level labels to segment different classes of infrared ships. …

Lessons Learned: Drive-Through Covid-19 Clinic Testing During An Adaptive Epidemic Response And A Point-Of-Care Test Assessment Of A Computer-Read Rapid Lateral Flow Immunoassay With Fluorescence-Based Detection, Leah Rankine-Wilson, Teresa Oncken, Irshan Basrewan, Courtney Jeffery, Todd M. Pryce, Rebecca Wake, Aus A.L. Molan, T. F. Paton, Tim J.J. Inglis

Research outputs 2022 to 2026

Background. The COVID-19 pandemic demonstrated a need for robust SARS-CoV-2 test evaluation infrastructure to underpin biosecurity and protect the population during a pandemic health emergency. Gap statement. The first generation of rapid antigen tests was less accurate than molecular methods due to their inherent sensitivity and specificity shortfalls, compounded by the consequences of self-testing. This created a need for more accurate point-of-care SARS-CoV-2 detection methods. Aim. Here we present the lessons-learned during the COVID-19 emergency response in Western Australia including the detailed set-up, evaluation and operation of rapid antigen test in a state-run drive-through sample collection service during the COVID-19 …

Out-Of-Hospital Birth Training, Experience And Confidence Of Australian Rural Volunteer Ambulance Officers, Michella G. Hill, Belinda Flanagan, Sara Hansen, Luke Hopper, Brennen Mills

Research outputs 2022 to 2026

Introduction: Unplanned out-of-hospital births represent less outs have a high risk of life-threatening complications, which are than 1% of ambulance requests for assistance. However, these call- particularly complex in rural or remote settings with limited accessibility to specialist care support. Many community hospitals Four themes emerged from analysis: (1) Lack of education and no longer provide obstetrics care, so birth parents must travel to exposure to birth resulted in low confidence. Most participants larger regional or metropolitan hospitals for assistance. Increased reported significant anxiety attending obstetric call-outs, and travel time may increase the risk of unplanned out-of-hospital explained under-utilisation of …

Prevalence Of Disordered Eating And Its Relationship With Rapid Weight Loss Amongst Male And Female Combat Sport Competitors: A Prospective Study, Colin S. Doherty, Lauren V. Fortington, Oliver R. Barley

Research outputs 2022 to 2026

Objectives:

To compare prevalence and change scores of disordered eating (DE) in combat sport athletes by sex and explore the potential relationship between rapid weight loss (RWL) and DE scores.

Design:

Prospective study based on 24 events (September 2022–2023).

Methods:

A body mass (BM) questionnaire was completed at ~ 1 day post-competition providing pre-competition BM data for − 7 days, − 24 h, and weigh-in. The Athletic Disordered Eating (ADE) online questionnaire was completed at ~ 7 and ~ 28 days post-competition, providing overall DE and four subscale scores (food and energy control, bingeing, body control, and body discontent).

Results: …

Self-Efficacy And Home Dialysis: An Integrative Review, Nicola A. D'Souza, Ma'en Zaid Abu-Qamar, Lisa Whitehead

Research outputs 2022 to 2026

Background: Enhancing patient confidence in their ability (self-efficacy) is vital to ensure people are equipped to maintain home dialysis protocols. Bandura's social cognitive theory provided a framework for understanding the role of self-efficacy in patients managing home dialysis. Objectives: To identify self-reported levels of self-efficacy, the measurements used to assess self-efficacy and the effectiveness of interventions to enhance self-efficacy in patients undergoing home dialysis. Design: An integrative review approach was employed using Whittemore and Knafl's methodology. Methods: A comprehensive search was conducted to identify literature on self-efficacy in patients managing home dialysis. Searches were conducted in CINAHL, MEDLINE, Embase and …

Simple Climate Models That Can Be Used In Primary, Secondary, And Tertiary Education, Timothy G. Harrison, Michael T. Davies-Coleman, Alison C. Rivett, M. Anwar H. Khan, Joyce D. Sewry, Magdalena Wajrak, Nicholas M. Barker, Jonny Furze, Sophie D. Franklin, Linda Sellou, Naomi K.R. Shallcross, Dudley E. Shallcross

Research outputs 2022 to 2026

Climate change is of great concern to all age groups but in particular to children. “Simple” climate models have been in place for a long time and can be used effectively with post-16 students. For younger children, modifications are required, and we describe in this paper the development and use of two such models. The first (the Granny Model) is a pictorial version of the model that has been used extensively with primary and early secondary school aged children (14 and younger). The second is an online version of the simple climate model that can be used without recourse to …

The Delta Concept Does Not Effectively Normalise Exercise Responses To Exhaustive Interval Training, Arthur Henrique Bossi, Wouter Timmerman, Diana Cole, Louis Passfield, James Hopker

Research outputs 2022 to 2026

Objectives: This study was designed to quantify inter- and intra-individual variability in performance, physiological, and perceptual responses to high-intensity interval training prescribed using the percentage of delta (%Δ) method, in which the gas exchange threshold and maximal oxygen uptake (V̇O2max) are taken into account to normalise relative exercise intensity. Design: Repeated-measures, within-subjects design with mixed-effects modelling. Methods: Eighteen male and four female cyclists (age: 36 ± 12 years, height: 178 ± 10 cm, body mass: 75.2 ± 13.7 kg, V̇O2max: 51.6 ± 5.3 ml·kg−1·min−1) undertook an incremental test to exhaustion to determine the gas exchange threshold and V̇O2max as prescription …

The Impact Of Domain Name Server (Dns) Over Hypertext Transfer Protocol Secure (Https) On Cyber Security: Limitations, Challenges, And Detection Techniques, Muhammad Dawood, Shanshan Tu, Chuangbai Xiao, Muhammad Haris, Hisham Alasmary, Muhammad Waqas, Sadaqat Ur Rehman

Research outputs 2022 to 2026

The DNS over HTTPS (Hypertext Transfer Protocol Secure) (DoH) is a new technology that encrypts DNS traffic, enhancing the privacy and security of end-users. However, the adoption of DoH is still facing several research challenges, such as ensuring security, compatibility, standardization, performance, privacy, and increasing user awareness. DoH significantly impacts network security, including better end-user privacy and security, challenges for network security professionals, increasing usage of encrypted malware communication, and difficulty adapting DNS-based security measures. Therefore, it is important to understand the impact of DoH on network security and develop new privacy-preserving techniques to allow the analysis of DoH traffic …

Understanding How Indigenous Knowledge Contributes To Climate Change Adaptation And Resilience: A Systematic Literature Review, Tashi Dorji, Kinley Rinchen, Angus Morrison-Saunders, David Blake, Vicki Banham, Sonam Pelden

Research outputs 2022 to 2026

Climate change is one of the biggest challenges facing the world today threatening societies and the future of the planet. The impacts of climate change are more severe in poor and marginalised populations like Indigenous communities where people rely heavily on their Indigenous Knowledge (IK) to adapt to the changing environment. Climate change adaptation and resilience are critical for the survival of Indigenous communities under the threat of climate change. This systematic literature review seeks to understand how IK contributes to climate change adaptation and resilience. A total of 71 papers from Scopus were analysed using the Preferred Reporting Items …

Levels Of Unrelated Diversification And Firm Performance: A Conceptual Description Of An S-Shaped Hypothesis, Kwaku Alex Gyan

Research outputs 2022 to 2026

This study reconceptualizes the so far inconclusive relationship between unrelated diversification and financial performance by explaining how coordination costs can shape the amount of free cash flow and related agency problems at different levels of unrelated diversification. The study builds upon the notion that coordination requirements and associated coordination costs will vary at levels of unrelated diversification to regulate the amount of free cash flow managers will have at their disposal at each level of unrelated diversification. Based on the agency costs associated with free cash flow, we conceptualize that at different stages of unrelated diversification, the degree of managerial …

Physical And Psychological Factors Related To Injury, Illness And Tactical Performance In Law Enforcement Recruits: A Systematic Review, Myles Murphy, Nicole Merrick, Gill Cowen, Vanessa Sutton, Garth Allen, Nicolas H. Hart, Andrea B. Mosler

Research outputs 2022 to 2026

Objective: There are inconsistent reports of factors relating to injury, illness and tactical performance in law enforcement recruits. Our objectives were to: (1) report physical and psychological risk factors and protective factors for injury and illness and (2) report physical and psychological risk factors and protective factors for tactical performance success. Design: Systematic epidemiological review.

Methods: Searches of six databases were conducted on 13 December 2022. We included cohorts that assessed physical and psychological factors for injury, illness and tactical performance success. Study quality was assessed using the Joanna Briggs Institute Quality Assessment Checklist for Prevalence Studies and certainty assessed …

Adapting A Telehealth Physical Activity And Diet Intervention To A Co-Designed Website For Self-Management After Stroke: Tutorial, Dina Pogrebnoy, Lee Ashton, Brian A. Beh, Meredith Burke, Richard Cullen, Jude Czerenkowski, Julie Davey, Amy M. Dennett, Kevin English, Erin Godecke, Nicole Harper, Elizabeth Lynch, Lesley Macdonald-Wicks, Amanda Patterson, Emily Ramage, Ben Schelfhaut, Dawn B. Simpson, Karly Zacharia, Coralie English

Research outputs 2022 to 2026

People who experience a stroke are at a higher risk of recurrent stroke when compared with people who have not had a stroke. Addressing modifiable risk factors like physical inactivity and poor diet has been shown to improve blood pressure, a leading contributor to stroke. However, survivors of stroke often experience challenges with accessing risk reduction services including long wait lists, difficulty with transportation, fatigue, impaired function, and diminished exercise capacity. Providing health interventions via a website can extend the reach when compared with programs that are only offered face to face or via real-time telehealth. Given global challenges of …

Board Ethical Commitment And Corporate Performace: A Qualitative Perspective, Ahmad Saiful Azlin Puteh Salin, Zubaidah Ismail, Malcolm Smith

Research outputs 2022 to 2026

The purpose of the study is to explore the responsibilities of directors in creating a good ethical culture in their organisation and examine whether good ethical practices are able to enhance a company’s performance. To achieve this purpose, face-to-face semi-structured interviews with directors as the respondents are employed as a data collection method. This study found that board ethical commitments are necessary elements for sustaining the good performance of a company. The planning and monitoring of these ethical practices are the responsibilities of the board of directors, which then will be executed by top management, led by the chief executive …

Change In Sprint Cycling Torque Is Not Associated With Change In Isometric Force Following Six Weeks Of Sprint Cycling And Resistance Training In Strength-Trained Novice Cyclists, Shannon Connolly, Peter Peeling, Martyn J. Binnie, Paul S.R. Goods, Wouter P. Timmerman, Toni Haddad, Chris R. Abbiss

Research outputs 2022 to 2026

Strong relationships exist between sprint cycling torque and isometric mid-thigh pull (IMTP) force production at one timepoint; however, the relationships between the changes in these measures following a training period are not well understood. Accordingly, this study examined the relationships in the changes of sprint cycling torque and IMTP force following six-weeks of sprint cycling and resistance training performed by strength-trained novice cyclists (n = 14). Cycling power, cadence, torque and IMTP force (Peak force [PF]/torque, average and peak rate of force/torque development [RFD/RTD], and RFD/RTD from 0 to 100 ms and 0–200 ms) were assessed before and after training. …

Diel Movement Patterns In Nominally Nocturnal Coral Reef Fishes (Haemulidae And Lutjanidae): Intra Vs. Interspecific Variation, William P. Collins, David R. Bellwood, Renato A. Morais, Nathan J. Waltham, Alexandre C. Siqueira

Research outputs 2022 to 2026

Movement of animals, habitat connectivity, and nutrient transport are key elements in the ecological functioning of coral reef ecosystems. However, most studies have focused on the diurnal component of these aspects; nocturnal patterns are less known. Our study aims to address this knowledge gap by assessing diel movement patterns in ecologically and commercially important nocturnal coral reef fishes. We evaluate 122-days of acoustic telemetry data from 4 nocturnal species in 2 coral reef fish families (Haemulidae and Lutjanidae) on the Great Barrier Reef. For all species, we found a clear division between daytime resting areas on the reef and a …

Editorial: Rock Physics Of Unconventional Reservoirs: Volume Ii, Qiaomu Qi, Lidong Dai, Maxim Lebedev, Tobias Müller, Junfang Zhang

Research outputs 2022 to 2026

No abstract provided.

Irs-Enabled Noma Communication Systems: A Network Architecture Primer With Future Trends And Challenges, Haleema Sadia, Ahmad Kamal Hassan, Ziaul Haq Abbas, Ghulam Abbas, Muhammad Waqas, Zhu Han

Research outputs 2022 to 2026

Non-Orthogonal Multiple Access (NOMA) has already proven to be an effective multiple access scheme for 5th Generation (5G) wireless networks. It provides improved performance in terms of system throughput, spectral efficiency, fairness, and energy efficiency (EE). However, in conventional NOMA networks, performance degradation still exists because of the stochastic behavior of wireless channels. To combat this challenge, the concept of Intelligent Reflecting Surface (IRS) has risen to prominence as a low-cost intelligent solution for Beyond 5G (B5G) networks. In this paper, a modeling primer based on the integration of these two cutting-edge technologies, i.e., IRS and NOMA, for B5G wireless …

Longitudinal Associations Between Exercise And Biomarkers In Autosomal Dominant Alzheimer's Disease, Kelsey R. Sewell, James D. Doecke, Chengjie Xiong, Tammie Benzinger, Colin L. Masters, Christoph Laske, Mathias Jucker, Francisco Lopera, Brian A. Gordon, Jorge Llibre-Guerra, Johannes Levin, Edward D. Huey, Jason Hassenstab, Peter R. Schofield, Gregory S. Day, Nick C. Fox, Jasmeer Chhatwal, Laura Ibanez, Jee Hoon Roh, Richard Perrin, Jae Hong Lee, Ralph N. Martins, Stephanie Rainey-Smith, Samantha L. Gardener, Hamid R. Sohrabi, Belinda Brown

Research outputs 2022 to 2026

INTRODUCTION: We investigated longitudinal associations between self-reported exercise and Alzheimer's disease (AD)-related biomarkers in individuals with autosomal dominant AD (ADAD) mutations. METHODS: Participants were 308 ADAD mutation carriers aged 39.7 ± 10.8 years from the Dominantly Inherited Alzheimer's Network. Weekly exercise volume was measured via questionnaire and associations with brain volume (magnetic resonance imaging), cerebrospinal fluid biomarkers, and brain amyloid beta (Aβ) measured by positron emission tomography were investigated. RESULTS: Greater volume of weekly exercise at baseline was associated with slower accumulation of brain Aβ at preclinical disease stages β = –0.16 [–0.23 to –0.08], and a slower decline in …

Nurse Knowledge, Attitudes, And Barriers To Pressure Injuries: A Cross-Sectional Study In An Australian Metropolitan Teaching Hospital, Linda Coventry, Amanda Towell-Barnard, Joelle Winderbaum, Nicole Walsh, Mark Jenkins, Dimitri Beeckman

Research outputs 2022 to 2026

Background: Pressure injuries are associated with significant clinical complications with negative effects on the patient's emotional, psychological, social and physical wellbeing. However, in Australia little is known about the knowledge and attitudes of nurses towards hospital-acquired pressure injuries.

Objective: To determine nurse knowledge and attitudes towards hospital-acquired pressure injuries and to identify barriers towards prevention.

Methods: A cross-sectional study following the STROBE statement was conducted between May to July in 2017. All nurses at a major metropolitan teaching hospital in Western Australia were invited to participate. Nurse knowledge and attitude to pressure injury were assessed using validated Pressure Ulcer Knowledge …

Optimizing Resistance Training For Sprint And Endurance Athletes: Balancing Positive And Negative Adaptations, Bas Van Hooren, Per Aagaard, Anthony J. Blazevich

Research outputs 2022 to 2026

Resistance training (RT) triggers diverse morphological and physiological adaptations that are broadly considered beneficial for performance enhancement as well as injury risk reduction. Some athletes and coaches therefore engage in, or prescribe, substantial amounts of RT under the assumption that continued increments in maximal strength capacity and/or muscle mass will lead to improved sports performance. In contrast, others employ minimal or no RT under the assumption that RT may impair endurance or sprint performances. However, the morphological and physiological adaptations by which RT might impair physical performance, the likelihood of these being evoked, and the training program specifications that might …

Prioritising Children’S Participation In Research: Including Children’S Voices In Updating A National Early Learning Framework, Lennie Barblett, Jennifer Cartmel, Leanne Lavina, Fay Hadley, Susan Irvine, Linda J. Harrison, Francis Bobongie-Harris

Research outputs 2022 to 2026

Involving children as stakeholders and including their voices in updating the Australian Early Years Learning Framework (for children birth to age 5) was a focus of this project design. The design was grounded in participatory approaches with a children’s rights perspective, as the team prioritised seeking children’s views and encouraging their agency on matters that affect them. This three-stage research project across 15 months sought children’s input in each stage. Research methods consisted of everyday playful activities supported by educators in early childhood environments using dialogic drawing, talking circles and discussions using photo elicitation. Educators received information to support their …

Queering Apocalyptic Methodologies: Enacting The Utopian Performative Through Extended Reality Artwork, Cassandra Tytler

Research outputs 2022 to 2026

This paper takes its cue from Koro and Wolgemuth's conceptual writing on Apocalyptic Methodologies as an extended prompt to enact the utopian performative as a form of generative Queer Ecopedagogy. A utopian performative is the performance of future potential that critiques our present political moment, highlighting that the present is not enough. The paper offers a troubling of "nature"and place, in its suggestion that digital space can be a refuge for EE practice. It looks to virtual reality as a realm used to create space free from the constraints of colonial history or normative prescriptions of the non/human binary. The …

Reliability Of Time-Motion Analysis In Striking Combat Sports, L. Rohner, C. R. Abbiss, W. Poon, O. R. Barley

Research outputs 2022 to 2026

Introduction: Time-motion analysis (TMA) is a noninvasive performance analysis technique used in various sports to provide broad insights into the technical, tactical, and physiological demands of competitions by quantifying the mode, frequency, and duration of discrete activities. Objectives: This study aimed to assess the intra- and inter-observer reliability of activities in full-contact kickboxing athletes determined using TMA. Equipment and methods: A total of 29 bouts from the World Association of Kickboxing Organizations World Championships 2019, involving 58 male athletes, were analyzed by two expert analysts in a randomised order to determine the number of actions performed (i.e., punches, kicks, significant …

Suspended Particulate Organic Matter Supports Mesopredatory Fish Across A Tropical Seascape, Molly Moustaka, Tahlia J. Bassett, Leah Beltran, Michael V.W. Cuttler, Richard D. Evans, Daniel Gorman, Camille M. Grimaldi, Renee K. Gruber, Glenn A. Hyndes, Gary A. Kendrick, Natalie Travaglione, Shaun K. Wilson

Research outputs 2022 to 2026

Understanding the sources of primary production supporting marine food webs is important for conserving critical habitats. However, the importance of allochthonous versus autochthonous production is often unclear. We identify the sources of primary production supporting three species of predatory fish (Lutjanus carponotatus, Lutjanus fulviflamma, and Lethrinus punctulatus) in the Dampier Archipelago, Western Australia. The proportions of mangrove, seagrass, macroalgae, and suspended particulate organic matter (SPOM) assimilated by fish of different life-history stages and from different habitats were determined using stable isotopes and Bayesian mixing models. While contributions of sources varied among species and habitats, we found that SPOM was an …

The Australian Frailty Network: Development Of A Consumer-Focussed National Response To Frailty, Natasha Reid, Adrienne Young, Loretta Baldassar, Anja Christoffersen, Tracy Comans, Simon Conroy, Christopher Etherton-Beer, Jason Ferris, Maria Fiatarone Singh, Sarah Fox, Emily H. Gordon, Manonita Ghosh, Chandana Guha, Sarah Hilmer, Lisa Kouladjian O’Donnell, Benignus Logan, Kristiana Ludlow, Michelle Miller, Mark Morgan, Alison Mudge, John Muscedere, Donna Reidlinger, Kenneth Rockwood, Rosemary Saunders, David Ward, Paul Yates

Research outputs 2022 to 2026

Frailty is an important concept in the care of older adults. Over the past two decades, significant advances have been made in measuring frailty. While it is now well-recognised that frailty status is an important determinant of outcomes from medical illnesses or surgical interventions, frailty measurement is not currently routinely integrated into clinical practice. In the community setting, it is uncommon for general practitioners to deliver frailty-optimised care. In hospitals, there is substantial variability in how people living with frailty are managed. This variability is notable between and even within disciplines. Furthermore, gains from understanding frailty mechanisms and risk factors …

The Gender Pay Gap In The Australian Nursing Workforce: A Retrospective Observational Study, Gemma Doleman, Christine Duffield, Ian W. Li

Research outputs 2022 to 2026

Aim: To explore the gender pay gap among the Australian nursing workforce and identify reasons for such a gap. Background: Gender discrimination exists in nursing, with men having a higher rate of pay and a faster rate of career progression, irrespective of experience and qualifications. In addition, men are shown to have a greater representation in leadership roles compared to the proportion of men in the profession. Methods: The study uses a retrospective, observational survey design of graduate nurses from all Australian universities. Findings: The gender wage gap was around 4% at six months after graduation, increasing to 13% at …

Towards An Indigenous-Informed Multispecies Collaboratory, Sandra Wooltorton, Peta J. White

Research outputs 2022 to 2026

How does Australia's latest Indigenous defeat relate to Environmental Education? The answer is direct complicity. This paper begins with the premise that the failure of Australia's 2023 referendum on "The Voice to Parliament"is directly connected with education. The chapter builds on the proposition that local and Indigenous public knowledge could - and should - be the heart of environmental education. We apply a post-qualitative practice that is underpinned by innovative feminisms and the post-qualitative methods within a Multispecies Collaboratory, an experimental way of transforming our learning by attending to the responsive, relational world of all beings. We use this practice …

Variations In The Germinal Center Response Revealed By Genetically Diverse Mouse Strains, Anne Marie Aubin, Daria Vdovenko, Roxanne Collin, Lois Balmer, Lise Coderre, Grant Morahan, Félix Lombard-Vadnais, Sylvie Lesage

Research outputs 2022 to 2026

The humoral response is complex and involves multiple cellular populations and signaling pathways. Bacterial and viral infections, as well as immunization regimens, can trigger this type of response, promoting the formation of microanatomical cellular structures called germinal centers (GCs). GCs formed in secondary lymphoid organs support the differentiation of high-affinity plasma cells and memory B cells. There is growing evidence that the quality of the humoral response is influenced by genetic variants. Using 12 genetically divergent mouse strains, we assessed the impact of genetics on GC cellular traits. At steady state, in the spleen, lymph nodes and Peyer's patches, we …

Young Student’S Views Of Naplan: Impact On Wellbeing Through Drawn Responses, Pauline Roberts, Lennie Barblett

Research outputs 2022 to 2026

Standardized testing of academic knowledge is common in many developed countries. In Australia, the process implemented is the National Assessment Program for Literacy and Numeracy (NAPLAN). The stand-alone tests were introduced in 2008 for several educational and political reasons, and since that time, the results of this assessment have been used beyond their initial purpose and brought about an unintended consequence of making the tests high-stakes. The pressure of these assessments has the potential to impact student’s wellbeing, but little research has been done in this area and even less where the student’s perspectives are considered. This research examined the …

Rapid Analysis Of N-Nitrosamines In Urine Using Ultra High-Pressure Liquid Chromatography-Mass Spectrometry, S. Shinde, K. D. Croft, J. M. Hodgson, C. P. Bondonno

Research outputs 2022 to 2026

N-Nitrosamines, carcinogenic compounds present in dietary and environmental sources and formed endogenously, are believed to be linked with the presence of nitrate and nitrite, both within dietary sources and after intake. To fully evaluate this potential threat to human health, an accurate analytical method to measure N-nitrosamines in biological matrices is necessary. We report a simple, fast, selective mass spectrometry method to detect N-nitrosamines in human urine. Analysis of seven N-nitrosamines, N-nitrosodimethylamine (NDMA), N-nitrosomethylethylamine (NMEA), N-nitrosodiethylamine (NDEA), N-nitrosopiperdine (NPIP), N-nitrosopyrrolidine (NPYR), N-nitrosodi-N-propylamine (NDPA) and N-nitrosodi-N-butylamine (NDBA) in urine was quantitated using Ultra High-Pressure Liquid Chromatography-tandem Mass spectrometry (UHPLC-MS/MS). A Sorbent …