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Full-Text Articles in Social and Behavioral Sciences

Performance Evaluation Of Non-Gps Based Localization Techniques Under Shadowing Effects, Ngoc M. Nguyen, Le Chung Tran, Farzad Safaei, Son Lam Phung, Peter James Vial, Nam N. Huynh, Anne N. Cox, Theresa Harada, Johan Barthelemy Jan 2019

Performance Evaluation Of Non-Gps Based Localization Techniques Under Shadowing Effects, Ngoc M. Nguyen, Le Chung Tran, Farzad Safaei, Son Lam Phung, Peter James Vial, Nam N. Huynh, Anne N. Cox, Theresa Harada, Johan Barthelemy

Faculty of Engineering and Information Sciences - Papers: Part B

Non-GPS localization has gained much interest from researchers and industries recently because GPS might fail to meet the accuracy requirements in shadowing environments. The two most common range-based non-GPS localization methods, namely Received Signal Strength Indicator (RSSI) and Angle-of-Arrival (AOA), have been intensively mentioned in the literature over the last decade. However, an in-depth analysis of the weighted combination methods of AOA and RSSI in shadowing environments is still missing in the state-of-the-art. This paper proposes several weighted combinations of the two RSSI and AOA components in the form of pAOA + qRSSI, devises the mathematical model for analyzing shadowing effects ...


Prolonged Cannabidiol Treatment Effects On Hippocampal Subfield Volumes In Current Cannabis Users, Camilla Beale, Samantha J. Broyd, Yann Chye, Mark M. Schira, Peter Galettis, Jennifer H. Martin, Murat Yucel, Nadia Solowij Jan 2018

Prolonged Cannabidiol Treatment Effects On Hippocampal Subfield Volumes In Current Cannabis Users, Camilla Beale, Samantha J. Broyd, Yann Chye, Mark M. Schira, Peter Galettis, Jennifer H. Martin, Murat Yucel, Nadia Solowij

Faculty of Social Sciences - Papers

No abstract provided.


Therapeutic Effects Of Prolonged Cannabidiol Treatment On Psychological Symptoms And Cognitive Function In Regular Cannabis Users: A Pragmatic Open-Label Clinical Trial, Nadia Solowij, Samantha J. Broyd, Camilla Beale, Julie-Anne Prick, Lisa-Marie Greenwood, Hendrika H. Van Hell, Chao Suo, Peter Galettis, Nagesh B. Pai, Shanlin Fu, Rodney J. Croft, Jennifer H. Martin, Murat Yucel Jan 2018

Therapeutic Effects Of Prolonged Cannabidiol Treatment On Psychological Symptoms And Cognitive Function In Regular Cannabis Users: A Pragmatic Open-Label Clinical Trial, Nadia Solowij, Samantha J. Broyd, Camilla Beale, Julie-Anne Prick, Lisa-Marie Greenwood, Hendrika H. Van Hell, Chao Suo, Peter Galettis, Nagesh B. Pai, Shanlin Fu, Rodney J. Croft, Jennifer H. Martin, Murat Yucel

Faculty of Social Sciences - Papers

Chronic cannabis use has been associated with impaired cognition and elevated psychological symptoms, particularly psychotic-like experiences.


Effects Of Oil-In-Water Based Nanolubricant Containing Tio2 Nanoparticles In Hot Rolling Of 304 Stainless Steel, Wenzhen Xia, Jingwei Zhao, Hui Wu, Xianming Zhao, Xiaoming Zhang, Jianzhong Xu, Sihai Jiao, Zhengyi Jiang Jan 2017

Effects Of Oil-In-Water Based Nanolubricant Containing Tio2 Nanoparticles In Hot Rolling Of 304 Stainless Steel, Wenzhen Xia, Jingwei Zhao, Hui Wu, Xianming Zhao, Xiaoming Zhang, Jianzhong Xu, Sihai Jiao, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

Energy saving and improvement of product quality are of crucial importance in hot rolling of 304 stainless steel. In this paper, oil-in-water (O/W) based nanolubricants containing TiO2 nanoparticles were developed to reduce the rolling force and improve the surface quality of rolled 304 stainless steel product. Practical hot rolling tests with and without application of lubricant were conducted to systematically investigate the effects of the developed O/W based nanolubricants on the rolling force, surface roughness, oxide scale thickness and tribological behaviour. The obtained results indicate that the nanoparticles can enter the deform zone with oil droplets to ...


A 6-Month Randomised Controlled Trial Investigating Effects Of Mediterranean-Style Diet And Fish Oil Supplementation On Dietary Behaviour Change, Mental And Cardiometabolic Health And Health-Related Quality Of Life In Adults With Depression (Helfimed): Study Protocol, Dorota M. Zarnowiecki, Jihyun Cho, Amy Wilson, Svetlana Bogomolova, Anthony Villani, Catherine Itsiopoulos, Theo Niyonsenga, Kerin O'Dea, Sarah Blunden, Barbara J. Meyer, Leonie Segal, Natalie Parletta Jan 2016

A 6-Month Randomised Controlled Trial Investigating Effects Of Mediterranean-Style Diet And Fish Oil Supplementation On Dietary Behaviour Change, Mental And Cardiometabolic Health And Health-Related Quality Of Life In Adults With Depression (Helfimed): Study Protocol, Dorota M. Zarnowiecki, Jihyun Cho, Amy Wilson, Svetlana Bogomolova, Anthony Villani, Catherine Itsiopoulos, Theo Niyonsenga, Kerin O'Dea, Sarah Blunden, Barbara J. Meyer, Leonie Segal, Natalie Parletta

Faculty of Science, Medicine and Health - Papers: part A

Background: Modern diets, characterised by excess consumption of processed foods, are accompanied by an epidemic of chronic diseases. Cardiovascular disease and depression carry a large burden of disease and often occur together. Poor dietary patterns have been identified as an independent risk factor for depression while healthy diets with minimally processed food are protective. Traditional Mediterranean diets have been shown to reduce risk of cardiovascular disease; however there is a need for clinical trials in people with depression. This paper reports the study protocol of a Mediterranean-style diet intervention conducted in adults with self-reported depression. Methods/design: HELFIMED is a ...


The (Possibly Negative) Effects Of Physical Activity On Executive Functions: Implications Of The Changing Metabolic Costs Of Brain Development, Steven J. Howard, Caylee J. Cook, Rihlat Said-Mohamed, Shane A. Norris, Catherine E. Draper Jan 2016

The (Possibly Negative) Effects Of Physical Activity On Executive Functions: Implications Of The Changing Metabolic Costs Of Brain Development, Steven J. Howard, Caylee J. Cook, Rihlat Said-Mohamed, Shane A. Norris, Catherine E. Draper

Faculty of Social Sciences - Papers

Background: An area of growth in physical activity research has involved investigating effects of physical activity on children's executive functions. Many of these efforts seek to increase the energy expenditure of young children as a healthy and low-cost way to affect physical, health, and cognitive outcomes. Methods: We review theory and research from neuroscience and evolutionary biology, which suggest that interventions seeking to increase the energy expenditure of young children must also consider the energetic trade-offs that occur to accommodate changing metabolic costs of brain development. Results: According to Life History Theory, and supported by recent evidence, the high ...


Tunable Particle Focusing In A Straight Channel With Symmetric Semicircle Obstacle Arrays Using Electrophoresis-Modified Inertial Effects, Dan Yuan, Chao Pan, Jun Zhang, Sheng Yan, Qianbin Zhao, Gursel Alici, Weihua Li Jan 2016

Tunable Particle Focusing In A Straight Channel With Symmetric Semicircle Obstacle Arrays Using Electrophoresis-Modified Inertial Effects, Dan Yuan, Chao Pan, Jun Zhang, Sheng Yan, Qianbin Zhao, Gursel Alici, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part A

In this work, a novel microfluidic platform for tunable particle focusing in a straight channel with symmetric semicircle obstacle arrays using electrophoresis (EP)-modified inertial effects was presented. By exerting an EP force on the charged microparticles, a relative velocity gap between microspheres and fluid in a straight channel with symmetric semicircle obstacle arrays was implemented. The relative velocity and fluid shear will induce shear-slip lift force (Saffman lift force) perpendicular to the mainstream direction. Therefore, the focusing pattern can be altered using the electrophoresis-induced Saffman force. The effects of electric field direction, flow rate, electric field magnitude, and particle ...


Effects Of Hydraulic Pressure On Wrinkling And Earing In Micro Hydro Deep Drawing Of Sus304 Circular Cups, Liang Luo, Dongbin Wei, Xiaogang Wang, Cunlong Zhou, Qingxue Huang, Jianzhong Xu, Di Wu, Zhengyi Jiang Jan 2016

Effects Of Hydraulic Pressure On Wrinkling And Earing In Micro Hydro Deep Drawing Of Sus304 Circular Cups, Liang Luo, Dongbin Wei, Xiaogang Wang, Cunlong Zhou, Qingxue Huang, Jianzhong Xu, Di Wu, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part A

Influences of hydraulic pressure on forming features in micro hydro deep drawing are different from those in normal drawing due to the small size of specimens. In this study, micro hydro deep drawing of SUS304 sheets was carried out in order to study the impacts of the hydraulic pressure on the quality of the drawn cup. Experimental results indicate that there is a critical hydraulic pressure range from 3 to 6 % of the blank's initial yield stress, where wrinkling and earing development trends change twice. The wrinkling and the earing of the drawn cup also reach their local extremes ...


Effects Of Sintering Materials And Gas Conditions On Formation Of Silico-Ferrites Of Calcium And Aluminium During Iron Ore Sintering, Zhe Wang, David J. Pinson, Sheng Chew, Brian J. Monaghan, Mark Pownceby, Nathan A.S. Webster, Harold P. Rogers, Guangqing Zhang Jan 2016

Effects Of Sintering Materials And Gas Conditions On Formation Of Silico-Ferrites Of Calcium And Aluminium During Iron Ore Sintering, Zhe Wang, David J. Pinson, Sheng Chew, Brian J. Monaghan, Mark Pownceby, Nathan A.S. Webster, Harold P. Rogers, Guangqing Zhang

Faculty of Engineering and Information Sciences - Papers: Part A

Silico-ferrites of calcium and aluminium (SFCA) are desirable phases in a high quality iron ore sinter product. The effects of sintering temperature, CaO/SiO2 ratio, sintering gas atmosphere and cooling procedure on the phase composition of sintered specimens from an industrial sinter blend were examined with focus on the formation of SFCA phases. The proportions of mineral phases in specimens sintered at 1 250-1 325°C were quantitatively examined using image analysis. SFCA can be formed at low temperatures by solid state reactions, the formation of which was enhanced by increasing temperature. Further increasing sintering temperature promoted the reduction of ...


Balance Improvement Effects Of Biofeedback Systems With State-Of-The-Art Wearable Sensors: A Systematic Review, Christina Ma, Duo Wong, Wing K. Lam, Anson Wan, Winson Lee Jan 2016

Balance Improvement Effects Of Biofeedback Systems With State-Of-The-Art Wearable Sensors: A Systematic Review, Christina Ma, Duo Wong, Wing K. Lam, Anson Wan, Winson Lee

Faculty of Engineering and Information Sciences - Papers: Part A

Falls and fall-induced injuries are major global public health problems. Balance and gait disorders have been the second leading cause of falls. Inertial motion sensors and force sensors have been widely used to monitor both static and dynamic balance performance. Based on the detected performance, instant visual, auditory, electrotactile and vibrotactile biofeedback could be provided to augment the somatosensory input and enhance balance control. This review aims to synthesize the research examining the effect of biofeedback systems, with wearable inertial motion sensors and force sensors, on balance performance. Randomized and non-randomized clinical trials were included in this review. All studies ...


More Standing And Just As Productive: Effects Of A Sit-Stand Desk Intervention On Call Center Workers' Sitting, Standing, And Productivity At Work In The Opt To Stand Pilot Study, Josephine Chau, William Sukala, Karla Fedel, Anna Do, Lina Engelen, Megan Kingham, Amanda Sainsbury, Adrian E. Bauman Jan 2016

More Standing And Just As Productive: Effects Of A Sit-Stand Desk Intervention On Call Center Workers' Sitting, Standing, And Productivity At Work In The Opt To Stand Pilot Study, Josephine Chau, William Sukala, Karla Fedel, Anna Do, Lina Engelen, Megan Kingham, Amanda Sainsbury, Adrian E. Bauman

Faculty of Social Sciences - Papers

This study evaluated the effects of sit-stand desks on workers' objectively and subjectively assessed sitting, physical activity, and productivity. This quasi-experimental study involved one intervention group (n = 16) and one comparison group (n = 15). Participants were call center employees from two job-matched teams at a large telecommunications company in Sydney, Australia (45% female, 33 ± 11 years old). Intervention participants received a sit-stand desk, brief training, and daily e-mail reminders to stand up more frequently for the first 2 weeks post-installation. Control participants carried out their usual work duties at seated desks. Primary outcomes were workday sitting and physical activity assessed ...


Infusing Physical Activities Into The Classroom: Effects On Preschool Children's Geography Learning, Myrto-Foteini Mavilidi, Anthony D. Okely, Paul A. Chandler, Fred Paas Jan 2016

Infusing Physical Activities Into The Classroom: Effects On Preschool Children's Geography Learning, Myrto-Foteini Mavilidi, Anthony D. Okely, Paul A. Chandler, Fred Paas

Faculty of Social Sciences - Papers

In this intervention study, we investigated the effects of physical activities that were integrated into a geography task on preschool children's learning performance and enjoyment. Eight childcare centers with 87 four-to-five-year-old children were randomly assigned across an integrated physical activity condition, an unintegrated physical activity condition, and a control condition without physical activity. Children learned the names and a typical animal from each of the six continents using a floor-mounted world map with soft toy animals. Both learning conditions with physical activities showed higher performance than the learning condition without physical activities on an immediate retention test, and on ...


"Get-Up" Study Rationale And Protocol: A Cluster Randomised Controlled Trial To Evaluate The Effects Of Reduced Sitting On Toddlers' Cognitive Development, Rute Santos, Dylan P. Cliff, Steven J. Howard, Sanne Veldman, Ian M. R Wright, Eduarda Sousa-Sa, Joao R. Pereira, Anthony D. Okely Jan 2016

"Get-Up" Study Rationale And Protocol: A Cluster Randomised Controlled Trial To Evaluate The Effects Of Reduced Sitting On Toddlers' Cognitive Development, Rute Santos, Dylan P. Cliff, Steven J. Howard, Sanne Veldman, Ian M. R Wright, Eduarda Sousa-Sa, Joao R. Pereira, Anthony D. Okely

Faculty of Social Sciences - Papers

Background The educational and cognitive differences associated with low socioeconomic status begin early in life and tend to persist throughout life. Coupled with the finding that levels of sedentary time are negatively associated with cognitive development, and time spent active tends to be lower in disadvantaged circumstances, this highlights the need for interventions that reduce the amount of time children spend sitting and sedentary during childcare. The proposed study aims to assess the effects of reducing sitting time during Early Childhood Education and Care (ECEC) services on cognitive development in toddlers from low socio-economic families. Methods/Design We will implement ...


Synchrotron Activation Radiotherapy: Effects Of Dose-Rate And Energy Spectra To Tantalum Oxide Nanoparticles Selective Tumour Cell Radiosensitization Enhancement, Elette Engels, Michael L. F Lerch, Moeava Tehei, Konstantin K. Konstantinov, Susanna Guatelli, Anatoly B. Rosenfeld, Stephanie Corde Jan 2016

Synchrotron Activation Radiotherapy: Effects Of Dose-Rate And Energy Spectra To Tantalum Oxide Nanoparticles Selective Tumour Cell Radiosensitization Enhancement, Elette Engels, Michael L. F Lerch, Moeava Tehei, Konstantin K. Konstantinov, Susanna Guatelli, Anatoly B. Rosenfeld, Stephanie Corde

Faculty of Engineering and Information Sciences - Papers: Part A

Synchrotron radiation is unique in its ability to deliver dose at high dose rates using kiloelectronvolt photons. We are investigating the use of Tantalum pentoxide (Ta2O5) nano-structured particles (NSPs) that are to date unexplored in synchrotron radiation fields as they have high atomic number (Z=73) are biocompatible and are therefore potential radio sensitizers. We exposed cell culture flasks containing 9L gliosarcoma tumour cells or Madin-Darby Canine Kidney (MDCK) non-tumour cells to the NSPs and treated the cells using a broad synchrotron beam (140 keV median energy; average dose rate of 50 Gy/s) at the Australian Synchrotron. We compare ...


Etching Process Related Changes And Effects On Solid-Core Single-Mode Polymer Optical Fiber Grating, Kishore Bhowmik, Gang-Ding Peng, Yanhua Luo, Eliathamby Ambikairajah, Vedran Lovric, William R. Walsh, Ginu Rajan Jan 2016

Etching Process Related Changes And Effects On Solid-Core Single-Mode Polymer Optical Fiber Grating, Kishore Bhowmik, Gang-Ding Peng, Yanhua Luo, Eliathamby Ambikairajah, Vedran Lovric, William R. Walsh, Ginu Rajan

Faculty of Engineering and Information Sciences - Papers: Part A

Etching process related material and mechanical changes on solid-core single-mode polymer optical fiber (POF) and their influence on the characteristic properties of polymer fiber Bragg gratings (PFBGs) are studied. A poly(methyl methacrylate)-based POF is etched to different diameters, and it is experimentally demonstrated that etching can lead to a change in the Young's modulus of the fiber. It is found that etching process induced material changes of the polymer fiber can enhance the reflectivity and inherent sensitivity of PFBGs. It is demonstrated that gratings based on etched POF exhibit higher reflectivity with a shorter exposure time compared ...


Effects Of Salinity Build-Up On The Performance Of An Anaerobic Membrane Bioreactor Regarding Basic Water Quality Parameters And Removal Of Trace Organic Contaminants, Xiaoye Song, James A. Mcdonald, William E. Price, Stuart J. Khan, Faisal I. Hai, Hao H. Ngo, Wenshan Guo, Long D. Nghiem Jan 2016

Effects Of Salinity Build-Up On The Performance Of An Anaerobic Membrane Bioreactor Regarding Basic Water Quality Parameters And Removal Of Trace Organic Contaminants, Xiaoye Song, James A. Mcdonald, William E. Price, Stuart J. Khan, Faisal I. Hai, Hao H. Ngo, Wenshan Guo, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part A

The effects of elevated inorganic salt concentration on anaerobic membrane bioreactor (AnMBR) treatment regarding basic biological performance and trace organic contaminant (TrOC) removal were investigated. A set of 33 TrOCs were selected to represent pharmaceuticals, steroids, and pesticides in municipal wastewater. Results show potential adverse effects of increase in the bioreactor salinity to 15 g/L (as NaCl) on the performance of AnMBR with respect to chemical oxygen demand removal, biogas production, and the removal of most hydrophilic TrOCs. Furthermore, a decrease in biomass production was observed as salinity in the bioreactor increased. The removal of most hydrophobic TrOCs was ...


Acute And Chronic Effects Of Cannabinoids On Human Cognition-A Systematic Review, Samantha J. Broyd, Hendrika H. Van Hell, Camilla Beale, Murat Yucel, Nadia Solowij Jan 2016

Acute And Chronic Effects Of Cannabinoids On Human Cognition-A Systematic Review, Samantha J. Broyd, Hendrika H. Van Hell, Camilla Beale, Murat Yucel, Nadia Solowij

Faculty of Social Sciences - Papers

Cannabis use has been associated with impaired cognition during acute intoxication as well as in the unintoxicated state in long-term users. However, the evidence has been mixed and contested, and no systematic reviews of the literature on neuropsychological task-based measures of cognition have been conducted in an attempt to synthesize the findings. We systematically review the empirical research published in the past decade (from January 2004 to February 2015) on acute and chronic effects of cannabis and cannabinoids and on persistence or recovery after abstinence. We summarize the findings into the major categories of the cognitive domains investigated, considering sample ...


The Effects Of Vacuum Annealing Temperatures On The Microstructure, Mechanical Properties And Electrical Resistivity Of Mg-3al-1zn Alloy Ribbons, Fenghua Chen, Qingxue Huang, Zhengyi Jiang, Jingwei Zhao, Binyu Sun, Yugui Li Jan 2015

The Effects Of Vacuum Annealing Temperatures On The Microstructure, Mechanical Properties And Electrical Resistivity Of Mg-3al-1zn Alloy Ribbons, Fenghua Chen, Qingxue Huang, Zhengyi Jiang, Jingwei Zhao, Binyu Sun, Yugui Li

Faculty of Engineering and Information Sciences - Papers: Part A

This paper investigates the influence of vacuum annealing temperature on the microstructure, mechanical properties and electrical resistivity of Mg-3Al-1Zn rapid solidification (RS) magnesium ribbons. The results indicate that when the annealing temperature is increased, the grain size of the ribbons is dramatically reduced from 10 to 1 μm. The highest break stress and micro-hardness is obtained at 673 K. These effects are ascribed to the dispersion strengthening caused by the high amount of fine nanoparticles distributed in the material. Electrical resistivity-temperature (ρ-T) curves have been used to provide useful information about the effects of the annealing temperature on the grain ...


Effects Of Grain Boundaries In Oxide Scale On Tribological Properties Of Nanoparticles Lubrication, Xianglong Yu, Zhengyi Jiang, Jingwei Zhao, Dongbin Wei, Cunlong Zhou, Qingxue Huang Jan 2015

Effects Of Grain Boundaries In Oxide Scale On Tribological Properties Of Nanoparticles Lubrication, Xianglong Yu, Zhengyi Jiang, Jingwei Zhao, Dongbin Wei, Cunlong Zhou, Qingxue Huang

Faculty of Engineering and Information Sciences - Papers: Part A

The characters of grain boundaries in oxide layers formed on substrates influence adhesion and friction behaviour, surface fracture and wear during high temperature steel processing. In this work, an electron backscattered diffraction (EBSD) analysis was conducted to investigate the role of surface grain boundary and orientation in magnetite (Fe3O4)/haematite (α-Fe2O3) scale during hot rolling, and further evaluate their effects on tribological properties of water-based nanoparticles lubrication. The results demonstrate that Fe3O4 (100) plane is strongly sensitive to the surface characteristics as the minimisation of surface energy. Coincident site lattice (CSL ...


Effects Of Integrated Physical Exercises And Gestures On Preschool Children's Foreign Language Vocabulary Learning, Myrto-Foteini Mavilidi, Anthony D. Okely, Paul A. Chandler, Dylan P. Cliff, Fred Paas Jan 2015

Effects Of Integrated Physical Exercises And Gestures On Preschool Children's Foreign Language Vocabulary Learning, Myrto-Foteini Mavilidi, Anthony D. Okely, Paul A. Chandler, Dylan P. Cliff, Fred Paas

Faculty of Social Sciences - Papers

Research suggests that integrating human movement into a cognitive learning task can be effective for learning due to its cognitive and physiological effects. In this study, the learning effects of enacting words through whole-body movements (i.e., physical exercise) and part-body movements (i.e., gestures) were investigated in a foreign language vocabulary task. Participants were 111 preschool children of 15 childcare centers, who were randomly assigned to one of four conditions. Participants had to learn 14 Italian words in a 4-week teaching program. They were tested on their memory for the words during, directly after, and 6 weeks after the ...


Understanding The Effects Of Crime On Women: Fear And Well-Being In The Context Of Diverse Relationships, Natalia K. Hanley, Leah Ruppanner Jan 2015

Understanding The Effects Of Crime On Women: Fear And Well-Being In The Context Of Diverse Relationships, Natalia K. Hanley, Leah Ruppanner

Faculty of Social Sciences - Papers

The risk-fear paradox, whereby people who experience the least criminal victimisation report the greatest fear of crime, has been established in the extant literature. That this paradox is gendered, notably that women report greater fear yet are less likely to experience crime, has also been consistently identified. However, there remains a largely unanswered call to explore further the distinctive experiences of women and men. There are likely to be substantial within-group differences as well as between-group differences in experiences of crime and reported fear of crime. For instance, women may experience fear differently by relationship type. Specifically, women in non-traditional ...


Model-Based Correction For Scatter And Tailing Effects In Simultaneous 99mtc And 123i Imaging For A Cdznte Cardiac Spect Camera, Maria Holstensson, Kjell Erlandsson, Gavin Poludniowski, Simona Ben-Haim, Brian F. Hutton Jan 2015

Model-Based Correction For Scatter And Tailing Effects In Simultaneous 99mtc And 123i Imaging For A Cdznte Cardiac Spect Camera, Maria Holstensson, Kjell Erlandsson, Gavin Poludniowski, Simona Ben-Haim, Brian F. Hutton

Faculty of Engineering and Information Sciences - Papers: Part A

2015 Institute of Physics and Engineering in Medicine. An advantage of semiconductor-based dedicated cardiac single photon emission computed tomography (SPECT) cameras when compared to conventional Anger cameras is superior energy resolution. This provides the potential for improved separation of the photopeaks in dual radionuclide imaging, such as combined use of 99mTc and 123I . There is, however, the added complexity of tailing effects in the detectors that must be accounted for. In this paper we present a model-based correction algorithm which extracts the useful primary counts of 99mTc and 123I from projection data. Equations describing the in-patient ...


A Promising Set Of Spreading Sequences To Mitigate Mai Effects In Mimo Sts Systems, Anh Tuyen Le, Le Chung Tran, Prashan Premaratne, David Stirling, Beata J. Wysocki, Tadeusz A. Wysocki, Peter J. Vial Jan 2015

A Promising Set Of Spreading Sequences To Mitigate Mai Effects In Mimo Sts Systems, Anh Tuyen Le, Le Chung Tran, Prashan Premaratne, David Stirling, Beata J. Wysocki, Tadeusz A. Wysocki, Peter J. Vial

Faculty of Engineering and Information Sciences - Papers: Part A

Multiple input, Multiple output space time spreading (MIMO STS) system is a scheme which can provide full diversity gain without extra resource requirements. However, its performance degrades significantly when multiple access interference (MAI) occurs. In order to mitigate MAI effects, we propose a criterion to build a promising set of combination of spreading sequences for users. Simulation results show that the average BER performance of users using this promising set is about thirty percent lower than that of users using another set in case of 64 chip length Walsh-Hadamard code.


Why Experts Can Do What They Do: The Effects Of Exogenous Resources On The Domain Impact Level Of Activities (Dila), Tobias Debatin, Manuel Hopp, Wilma Vialle, Albert Ziegler Jan 2015

Why Experts Can Do What They Do: The Effects Of Exogenous Resources On The Domain Impact Level Of Activities (Dila), Tobias Debatin, Manuel Hopp, Wilma Vialle, Albert Ziegler

Faculty of Social Sciences - Papers

In many domains, it is estimated that approximately 10,000 hours of planned learning activities are required to reach an expert level of performance. However, this poses a challenge for learners to balance such extensive learning times with the demands of everyday life. In our study we focused on activities in the domain of chess. We hypothesized that chess-related activities could be better integrated in an individual's life if exogenous resources - specified in the educational capital approach (Ziegler & Baker, 2013) - are sufficiently available. In order to test this hypothesis we introduced the concept of the Domain Impact Level of ...


Online Cognitive Training In Healthy Older Adults: A Preliminary Study On The Effects Of Single Versus Multi-Domain Training, Courtney C. Walton, Alexandra Kavanagh, Luke Downey, Justine Lomas, David A. Camfield, Con Stough Jan 2015

Online Cognitive Training In Healthy Older Adults: A Preliminary Study On The Effects Of Single Versus Multi-Domain Training, Courtney C. Walton, Alexandra Kavanagh, Luke Downey, Justine Lomas, David A. Camfield, Con Stough

Faculty of Social Sciences - Papers

It has been argued that cognitive training may be effective in improving cognitive performance in healthy older adults. However, inappropriate active control groups often hinder the validity of these claims. Additionally there are relatively few independent empirical studies on popular commercially available cognitive training programs. The current research extends on previous work to explore cognitive training employing a more robust control group. Twenty-eight healthy older adults (age: M = 64.18, SD = 6.9) completed either a multi-faceted online computerised cognitive training program or trained on a simple reaction time task for 20 minutes a day over a 28 day period ...


Effects Of Observing And Making Movements On Learning, Sahar Bokosmaty, Fred Paas Jan 2015

Effects Of Observing And Making Movements On Learning, Sahar Bokosmaty, Fred Paas

Faculty of Social Sciences - Papers

Abstract presented at the 8th Cognitive Load Theory Conference, Fort Collins, Colorado, USA, June 15th - 17th, 2015.


Reducing Cognitive Load: The Effects Of Gesturing On Children's Effective Working Memory Capacity, Sahar Bokosmaty, Steven J. Howard, Myrto-Foteini Mavilidi, Fred Paas Jan 2015

Reducing Cognitive Load: The Effects Of Gesturing On Children's Effective Working Memory Capacity, Sahar Bokosmaty, Steven J. Howard, Myrto-Foteini Mavilidi, Fred Paas

Faculty of Social Sciences - Papers

Abstract presented at the 8th Cognitive Load Theory Conference, Fort Collins, Colorado, USA, June 15th - 17th, 2015.


Interactive Effects Of Early And Recent Exposure To Stressful Contexts On Cortisol Reactivity In Middle Childhood, Sara R. Jaffee, Tara Mcfarquhar, Suzanne Stevens, Isabelle Ouellet-Morin, Edward Melhuish, Jay Belsky Jan 2015

Interactive Effects Of Early And Recent Exposure To Stressful Contexts On Cortisol Reactivity In Middle Childhood, Sara R. Jaffee, Tara Mcfarquhar, Suzanne Stevens, Isabelle Ouellet-Morin, Edward Melhuish, Jay Belsky

Faculty of Social Sciences - Papers

Background Given mixed findings as to whether stressful experiences and relationships are associated with increases or decreases in children's cortisol reactivity, we tested whether a child's developmental history of risk exposure explained variation in cortisol reactivity to an experimentally induced task. We also tested whether the relationship between cortisol reactivity and children's internalizing and externalizing problems varied as a function of their developmental history of stressful experiences and relationships. Method Participants included 400 children (M = 9.99 years, SD = 0.74 years) from the Children's Experiences and Development Study. Early risk exposure was measured by children ...


If A Safety Aid Is Present, There Must Be Danger: The Paradoxical Effects Of Hand Sanitizer During A Contamination Exposure Task, Shannon M. Blakey, Brett J. Deacon Jan 2015

If A Safety Aid Is Present, There Must Be Danger: The Paradoxical Effects Of Hand Sanitizer During A Contamination Exposure Task, Shannon M. Blakey, Brett J. Deacon

Faculty of Social Sciences - Papers

Perceptions of danger often arise in the context of feared threat cues, but individuals also rely on other heuristics that lead them to infer danger in ambiguous situations. For example, individuals may interpret their own anxiety or safety-seeking behaviors as indicators of threat. Another potential source of danger information is the mere availability of safety aids in the environment. Although assumed to be helpful, safety aids might paradoxically elicit, rather than alleviate, anxiety. The present study was designed to assess the degree to which concern-relevant safety aids exacerbate distress. Participants (N = 71) completed several self-report measures and engaged in a ...


Participatory Or Deliberative Democracy? Exploring The Mediation Effects Of Perceived Online Deliberation And Online Interactive Activities On Social Outcomes, Kyung Han You, Jeong Kyu Lee, Hyunjin Kang, Eun Go Jan 2015

Participatory Or Deliberative Democracy? Exploring The Mediation Effects Of Perceived Online Deliberation And Online Interactive Activities On Social Outcomes, Kyung Han You, Jeong Kyu Lee, Hyunjin Kang, Eun Go

Faculty of Social Sciences - Papers

Using the structural equation modeling method (N = 811), this study explores the structural relationships among online news consumption, political participation and social trust, with a focus on the mediating effects of online users' deliberative perceptions and news-related online interactive activities. The analysis confirms that users' perceptions of online deliberation exert a significant mediating effect on users' levels of news consumption, political participation, and social trust. Users' interactive civic messaging behaviors, on the other hand, solely enhance participatory intentions. The findings also show that the consumption of political news and the consumption of entertainment news have different effects on users' perceptions ...