Science and Technology Studies Commons™

Articles 1 - 30 of 3922

Full-Text Articles in Science and Technology Studies

A Novel Cloud Based Auxiliary Medical System For Hypertension Management, Rui Zhou, Yunshan Cao, Rui Zhou, Qingwei Zhou, Jun Shen, Qingguo Zhou, Haifeng Zhang Jan 2019

A Novel Cloud Based Auxiliary Medical System For Hypertension Management, Rui Zhou, Yunshan Cao, Rui Zhou, Qingwei Zhou, Jun Shen, Qingguo Zhou, Haifeng Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

As a common disease, hypertension (HTN) can lead to severe complications such as heart failure, renal failure and stroke. However, delayed diagnosis often happens because of no obvious symptoms in earlier stage. This paper addresses the issue through a novel cloud based auxiliary medical system for HTN. Nowadays, telemedicine has been used to diagnose and monitor HTN by sharing and consulting personal health status with doctors. Its high flexibility and processing ability have helped to reduce the overall cost of medical care and enhanced the control rate. Technically, telemedicine uses communication, holographic imaging and computer science to achieve the management ...

Monte Carlo Investigation Of The Characteristics Of Radioactive Beams For Heavy Ion Therapy, Andrew Chacon, Mitra Safavi-Naeini, David Bolst, Susanna Guatelli, Daniel R. Franklin, Yuma Iwao, Go Akamatsu, Hideaki Tashima, Eiji Yoshida, Fumihiko Nishikido, Atsushi Kitagawa, Akram Mohammadi, Marie-Claude Gregoire, Taiga Yamaya, Anatoly B. Rosenfeld Jan 2019

Monte Carlo Investigation Of The Characteristics Of Radioactive Beams For Heavy Ion Therapy, Andrew Chacon, Mitra Safavi-Naeini, David Bolst, Susanna Guatelli, Daniel R. Franklin, Yuma Iwao, Go Akamatsu, Hideaki Tashima, Eiji Yoshida, Fumihiko Nishikido, Atsushi Kitagawa, Akram Mohammadi, Marie-Claude Gregoire, Taiga Yamaya, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

Evaluation Of Coal Seam Gas Drainability For Outburst-Prone And High-Co2-Containing Coal Seam, Lei Zhang, Ting X. Ren, Naj Aziz, Cun Zhang Jan 2019

Evaluation Of Coal Seam Gas Drainability For Outburst-Prone And High-Co2-Containing Coal Seam, Lei Zhang, Ting X. Ren, Naj Aziz, Cun Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents the results of an evaluation study of gas drainability in the Bulli seam in the Southern Coalfield of the Sydney Basin, NSW, Australia, where the coal seam gas (CSG) contains a high proportion of carbon dioxide (CO 2 ). Historically the gas drainability in some particular areas of this coal seam was found to be particularly poor, which posed a significant challenge to gas predrainage. As a result, a large volume of greenhouse gases were released to the atmosphere during mining of the coal seam. Furthermore, the high gas content associated with the CO 2 -rich composition also ...

Functional Liquid Metal Nanoparticles Produced By Liquid-Based Nebulization, Shiyang Tang, Ruirui Qiao, Yiliang Lin, Yuhuan Li, Qianbin Zhao, Dan Yuan, Guolin Yun, Jinhong Guo, Michael Dickey, Tony Jun Huang, Thomas P. Davis, Kourosh Kalantar-Zadeh, Weihua Li Jan 2019

Functional Liquid Metal Nanoparticles Produced By Liquid-Based Nebulization, Shiyang Tang, Ruirui Qiao, Yiliang Lin, Yuhuan Li, Qianbin Zhao, Dan Yuan, Guolin Yun, Jinhong Guo, Michael Dickey, Tony Jun Huang, Thomas P. Davis, Kourosh Kalantar-Zadeh, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

Functional liquid metal nanoparticles (NPs), produced from eutectic alloys of gallium, promise new horizons in the fields of sensors, microfluidics, flexible electronics, catalysis, and biomedicine. Here, the development of a vapor cavity generating ultrasonic platform for nebulizing liquid metal within aqueous media for the one-step production of stable and functional liquid metal NPs is shown. The size distribution of the NPs is fully characterized and it is demonstrated that various macro and small molecules can also be grafted onto these liquid metal NPs during the liquid-based nebulization process. The cytotoxicity of the NPs grafted with different molecules is further explored ...

A New Standard Dna Damage (Sdd) Data Format, Jan Schuemann, A L. Mcnamara, J Warmenhoven, N Henthorn, K Kirkby, M Merchant, S Ingram, Harald Paganetti, Kathryn D. Held, J Ramos-Mendez, B Faddegon, J Perl, D Goodhead, I Plante, Hans Rabus, Heidi Nettelbeck, W Friedland, P Kundrat, A Ottolenghi, G Baiocco, S Barbieri, M Dingfelder, Sebastien Incerti, Carmen Villagrasa, M Bueno, M A. Bernal, Susanna Guatelli, Dosatsu Sakata, J Brown, Z Francis, Ioanna Kyriakou, N Lampe, F Ballarini, M Carante, M Davidkova, V Stepan, X Jia, F. Cucinotta, Reinhard W. Schulte, R Stewart, David Carlson, S Galer, Zdenka Kuncic, S Lacombe, J Milligan, S Cho, G Sawakuchi, T Inaniwa, T Sato, W Li, Audrey V. Solov'yov, Eugene Surdutovich, M Durante, Kevin M. Prise, Stephen J. Mcmahon Jan 2019

A New Standard Dna Damage (Sdd) Data Format, Jan Schuemann, A L. Mcnamara, J Warmenhoven, N Henthorn, K Kirkby, M Merchant, S Ingram, Harald Paganetti, Kathryn D. Held, J Ramos-Mendez, B Faddegon, J Perl, D Goodhead, I Plante, Hans Rabus, Heidi Nettelbeck, W Friedland, P Kundrat, A Ottolenghi, G Baiocco, S Barbieri, M Dingfelder, Sebastien Incerti, Carmen Villagrasa, M Bueno, M A. Bernal, Susanna Guatelli, Dosatsu Sakata, J Brown, Z Francis, Ioanna Kyriakou, N Lampe, F Ballarini, M Carante, M Davidkova, V Stepan, X Jia, F. Cucinotta, Reinhard W. Schulte, R Stewart, David Carlson, S Galer, Zdenka Kuncic, S Lacombe, J Milligan, S Cho, G Sawakuchi, T Inaniwa, T Sato, W Li, Audrey V. Solov'yov, Eugene Surdutovich, M Durante, Kevin M. Prise, Stephen J. Mcmahon

Faculty of Engineering and Information Sciences - Papers: Part B

Our understanding of radiation-induced cellular damage has greatly improved over the past few decades. Despite this progress, there are still many obstacles to fully understand how radiation interacts with biologically relevant cellular components, such as DNA, to cause observable end points such as cell killing. Damage in DNA is identified as a major route of cell killing. One hurdle when modeling biological effects is the difficulty in directly comparing results generated by members of different research groups. Multiple Monte Carlo codes have been developed to simulate damage induction at the DNA scale, while at the same time various groups have ...

Fertility Detection Of Hatching Eggs Based On A Convolutional Neural Network, Lei Geng, Yuzhou Hu, Zhitao Xiao, Jiangtao Xi Jan 2019

Fertility Detection Of Hatching Eggs Based On A Convolutional Neural Network, Lei Geng, Yuzhou Hu, Zhitao Xiao, Jiangtao Xi

Faculty of Engineering and Information Sciences - Papers: Part B

In order to achieve the goal of detecting the fertility of hatching eggs which are divided into fertile eggs and dead eggs more accurately and effectively, a novel method combining a convolution neural network (CNN) and a heartbeat signal of the hatching eggs is proposed in this paper. Firstly, we collected heartbeat signals of 9-day-later hatching eggs by the method of PhotoPlethysmoGraphy (PPG), which is a non-invasive method to detect the change of blood volume in living tissues by photoelectric means. Secondly, a sequential convolutional neural network E-CNN, which was used to analyze heartbeat sequence of hatching eggs, was designed ...

Improved Dynamic Stall Prediction Of Wind Turbine Airfoils, Xiong Liu, Cheng Lu, Shi Liang, Ajit R. Godbole, Yan Chen Jan 2019

Improved Dynamic Stall Prediction Of Wind Turbine Airfoils, Xiong Liu, Cheng Lu, Shi Liang, Ajit R. Godbole, Yan Chen

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents a dynamic stall model to predict the unsteady airloads on wind turbine airfoils. The proposed model is based on the Beddoes-Leishman (B-L) model and modifications are carried out for wind turbine applications. The lift, drag, and pitch moment of the S809 airfoil oscillating in stall-development and deep-stall regimes are predicted. Validation against available experimental data shows overall good agreement.

Integrated Trajectory Planning And Control For Obstacle Avoidance Manoeuvre Using Non-Linear Vehicle Mp Algorithm, Boyuan Li, Haiping Du, Weihua Li, Bangji Zhang Jan 2019

Integrated Trajectory Planning And Control For Obstacle Avoidance Manoeuvre Using Non-Linear Vehicle Mp Algorithm, Boyuan Li, Haiping Du, Weihua Li, Bangji Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

In the current literature, model-predictive (MP) algorithm is widely applied in autonomous vehicle trajectory planning and control but most of the current studies only apply the linear tyre model, which cannot accurately present the tyre non-linear characteristic. Furthermore, most of these studies separately consider the trajectory planning and trajectory control of the autonomous vehicle and few of them have integrated the trajectory planning and trajectory control together. To fill in above research gaps, this study proposes the integrated trajectory planning and trajectory control method using a non-linear vehicle MP algorithm. To fully utilise the advantages of four-wheel-independent-steering and four-wheel-independent-driving vehicle ...

Lattice Boltzmann Method Modeling Of Magnetic Water-Based Nanofluid Through A Permeable Three-Dimensional Enclosure, M Sheikholeslami, S Shehzad, Ahmad Shafee, F Abbasie, R Kandasamy, Zhixiong Li Jan 2019

Lattice Boltzmann Method Modeling Of Magnetic Water-Based Nanofluid Through A Permeable Three-Dimensional Enclosure, M Sheikholeslami, S Shehzad, Ahmad Shafee, F Abbasie, R Kandasamy, Zhixiong Li

Faculty of Engineering and Information Sciences - Papers: Part B

In this work, the mesoscopic theory is invoked to depict nanoparticle transportation through a porous cavity. Different amounts of Lorentz forces, Rayleigh number and permeability on the working fluid treatment have been examined. Al2O3-H2O is selected including the Brownian motion effect. Isokinetic, streamlines, and isotherms contours are various shapes of outputs. Results illustrate that the increase in magnetic forces lead to an increase in the conduction mode. Dispersing nanoparticles aids to increase the Hartmann number.

Primary Choroidal Lymphoma Diagnosed With 27-Gauge Pars Plana Vitrectomy Choroidal Biopsy, Andrew Kam, Justin Galvin, Svetlana Cherepanoff, Andrew Alexis Miller, Adrian Fung Jan 2019

Primary Choroidal Lymphoma Diagnosed With 27-Gauge Pars Plana Vitrectomy Choroidal Biopsy, Andrew Kam, Justin Galvin, Svetlana Cherepanoff, Andrew Alexis Miller, Adrian Fung

Faculty of Engineering and Information Sciences - Papers: Part B

Currently, transvitreal fine-needle aspiration biopsy is the most widely used tissue biopsy technique in cases of suspected intraocular lymphoma due to its relative simplicity and low trauma. The small sample produced, however, may be inadequate for diagnostic and prognostic analyses due to mechanical artefacts, insufficient material, or sampling errors. Small case series have demonstrated choroidal biopsy via vitrectomy to be safe and effective. With smaller-gauge vitrectomy instruments, visual recovery is rapid, and post-operative inflammation and conjunctival scarring is minimised. Furthermore, smaller-gauge instrumentation does not appear to affect the diagnostic yield of biopsies for intraocular lymphoma in vitro. We report a ...

Prospects For Protecting Business Microdata When Releasing Population Totals Via A Remote Server, James O. Chipperfield, John Newman, Gwenda Thompson, Yue Ma, Yan-Xia Lin Jan 2019

Prospects For Protecting Business Microdata When Releasing Population Totals Via A Remote Server, James O. Chipperfield, John Newman, Gwenda Thompson, Yue Ma, Yan-Xia Lin

Faculty of Engineering and Information Sciences - Papers: Part B

Many statistical agencies face the challenge of maintaining the confidentiality of respondents while providing as much analytical value as possible from their data. Datasets relating to businesses present particular difficulties because they are likely to contain information about large enterprises that dominate industries and may be more easily identified. Agencies therefore tend to take a cautious approach to releasing business data (e.g., trusted access, remote access and synthetic data). The Australian Bureau of Statistics has developed a remote server, called TableBuilder, which has the capability to allow users to specify and request tables created from business microdata. The tables ...

Behaviour Of Foam Concrete Under Impact Loading Based On Shpb Experiments, Yongliang He, Mingshi Gao, Hongchao Zhao, Yichao Zhao Jan 2019

Behaviour Of Foam Concrete Under Impact Loading Based On Shpb Experiments, Yongliang He, Mingshi Gao, Hongchao Zhao, Yichao Zhao

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents an innovative method for using foam concrete as a typical building material for soft structures in underground coal mines subjected to dynamic loading. To understand the behaviour of foam concrete under impact loading, a total of 30 specimens with a diameter of 50 mm and a height of 50 mm were experimentally tested using a 75 mm diameter split Hopkinson pressure bar (SHPB) device. The key parameters investigated in the present study included the type of foam concrete (fly ash and sand), the density of foam concrete (1000, 1200 and 1400 kg/m3), and the impact velocity ...

Soi Thin Microdosimeter Detectors For Low Energy Ions And Radiation Damage Studies, Benjamin James, Linh T. Tran, James Vohradsky, David Bolst, Vladimir Pan, Madeline Carr, Susanna Guatelli, Alex Pogossov, Marco Petasecca, Michael L. F Lerch, Dale A. Prokopovich, Mark I. Reinhard, Marco Povoli, Angela Kok, David Hinde, Mahananda Dasgupta, Andrew Stuchbery, Vladimir Perevertaylo, Anatoly B. Rosenfeld Jan 2019

Soi Thin Microdosimeter Detectors For Low Energy Ions And Radiation Damage Studies, Benjamin James, Linh T. Tran, James Vohradsky, David Bolst, Vladimir Pan, Madeline Carr, Susanna Guatelli, Alex Pogossov, Marco Petasecca, Michael L. F Lerch, Dale A. Prokopovich, Mark I. Reinhard, Marco Povoli, Angela Kok, David Hinde, Mahananda Dasgupta, Andrew Stuchbery, Vladimir Perevertaylo, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

The responses of two silicon on insulator (SOI) 3-D microdosimeters developed by the Centre for Medical Radiation Physics were investigated with a range of different low energy ions, with high linear energy transfer (LET). The two microdosimeters n-SOI and p-SOI were able to measure the LET of different ions including 7 Li, 12 C, 16 O, and 48 Ti with ranges below 350 μm in silicon. No plasma effects were seen in the SOI microdosimeters when irradiated with the high LET ions. A Monte Carlo simulation using Geant4 was compared to the experimental measurements, whereby some discrepancies were observed for ...

Analysis Of A Main Cabin Ventilation System In A Jack-Up Offshore Platform Part I: Numerical Modelling, Yingchun Xie, Zepeng Zheng, Huibin Wang, Zhen Xu, Guijie Liu, Reza Malekian, Zhixiong Li Jan 2019

Analysis Of A Main Cabin Ventilation System In A Jack-Up Offshore Platform Part I: Numerical Modelling, Yingchun Xie, Zepeng Zheng, Huibin Wang, Zhen Xu, Guijie Liu, Reza Malekian, Zhixiong Li

Faculty of Engineering and Information Sciences - Papers: Part B

This work aims to measure the thermodynamics of a main cabin ventilation system in a JU-2000E jack-up offshore platform. A three-dimensional (3D) physical model of the ventilation system was established, and the computational fluid dynamics (CFD) software (ANSYS FLUENT) was used to calculate the model thermodynamics. Numerical analysis was performed to investigate the influence mechanisms of the ventilation factors such as ventilation temperature and volume on the ventilation performance. The analysis results demonstrate that (1) top-setting of the exhaust vents is more effective than the side-setting in terms of high temperature reduction, (2) small ventilation temperature and volume can improve ...

Authorized Equality Test On Identity-Based Ciphertexts For Secret Data Sharing Via Cloud Storage, Hongbo Li, Qiong Huang, Sha Ma, Jian Shen, Willy Susilo Jan 2019

Authorized Equality Test On Identity-Based Ciphertexts For Secret Data Sharing Via Cloud Storage, Hongbo Li, Qiong Huang, Sha Ma, Jian Shen, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part B

With the higher rate of using cloud storage, protecting data privacy becomes an important issue. The most effective solution is to encrypt data before uploading to the cloud. However, how to efficiently search over data encrypted with different keys is still an open problem. To address this problem, we introduce a new notion of the identity-based encryption with equality test supporting flexible authorization (IBEET-FA). It supports the test of whether two ciphertexts encrypted under the different keys encapsulate the same message, and in the meanwhile supports fine-grained authorization of the test. Based on the equality test on ciphertexts, there is ...

A Novel Data Forwarding Strategy For A Drone Delay Tolerant Network With Range Extension, Saeid Iranmanesh, Raad Raad Jan 2019

A Novel Data Forwarding Strategy For A Drone Delay Tolerant Network With Range Extension, Saeid Iranmanesh, Raad Raad

Faculty of Engineering and Information Sciences - Papers: Part B

Amazon, Uber Eats, and United Parcel Service (UPS) are planning to launch drone delivery services in the near future. Indeed, recently, Google has received Federal Aviation Administration (FAA) approval for its Wings delivery platform. Amazon claims that a drone logistics network is more cost-efficient and quicker than a motor vehicle delivery network. In this paper, we propose a data delivery service by the drone network in addition to parcel delivery. We propose Heuristic Flight Path Planning (HFPP) that plans a drone's flight path based on parcel delivery destination as well as data delivery destinations (waypoints). We further extend the ...

Polymerisation Shrinkage Profiling Of Dental Composites Using Optical Fibre Sensing And Their Correlation With Degree Of Conversion And Curing Rate, Ginu Rajan, Raju Raju, Sagar Jinachandran, Paul Farrar, Jiangtao Xi, Gangadhara B. Prusty Jan 2019

Polymerisation Shrinkage Profiling Of Dental Composites Using Optical Fibre Sensing And Their Correlation With Degree Of Conversion And Curing Rate, Ginu Rajan, Raju Raju, Sagar Jinachandran, Paul Farrar, Jiangtao Xi, Gangadhara B. Prusty

Faculty of Engineering and Information Sciences - Papers: Part B

Traditional polymerisation shrinkage (PS) measurement systems measure average PS of dental composites, but the true local PS varies along the length and breadth of the composite. The PS depends on the curing light intensity distribution, resultant degree of conversion (DOC) and the curing rate. In this paper, optical fibre Bragg grating (FBG) sensing based technology is used to measure the linear post-gel PS at multiple locations within dental composite specimens, and is correlated with DOC and curing rate. A commercial dental composite is used, and its post-gel PS and DOC are mapped using embedded fibre Bragg grating sensors at different ...

Factorisation Of Equivariant Spectral Triples In Unbounded Kk-Theory, Iain G. Forsyth, Adam C. Rennie Jan 2019

Factorisation Of Equivariant Spectral Triples In Unbounded Kk-Theory, Iain G. Forsyth, Adam C. Rennie

Faculty of Engineering and Information Sciences - Papers: Part B

We provide sufficient conditions to factorise an equivariant spectral triple as a Kasparov product of unbounded classes constructed from the group action on the algebra and from the fixed point spectral triple. We show that if factorisation occurs, then the equivariant index of the spectral triple vanishes. Our results are for the action of compact abelian Lie groups, and we demonstrate them with examples from manifolds and θ-deformations. In particular, we show that equivariant Dirac-type spectral triples on the total space of a torus principal bundle always factorise. Combining this with our index result yields a special case of the ...

Channel Covariance Matrix Estimation Via Dimension Reduction For Hybrid Mimo Mmwave Communication Systems, Rui Hu, Jun Tong, Jiangtao Xi, Qinghua Guo, Yanguang Yu Jan 2019

Channel Covariance Matrix Estimation Via Dimension Reduction For Hybrid Mimo Mmwave Communication Systems, Rui Hu, Jun Tong, Jiangtao Xi, Qinghua Guo, Yanguang Yu

Faculty of Engineering and Information Sciences - Papers: Part B

Hybrid massive MIMO structures with lower hardware complexity and power consumption have been considered as potential candidates for millimeter wave (mmWave) communications. Channel covariance information can be used for designing transmitter precoders, receiver combiners, channel estimators, etc. However, hybrid structures allow only a lower-dimensional signal to be observed, which adds difficulties for channel covariance matrix estimation. In this paper, we formulate the channel covariance estimation as a structured low-rank matrix sensing problem via Kronecker product expansion and use a low-complexity algorithm to solve this problem. Numerical results with uniform linear arrays (ULA) and uniform squared planar arrays (USPA) are provided ...

Metamorphic Relations For Detection Of Performance Anomalies, Owen Johnston, Darryl C. Jarman, Jeffrey Berry, Zhi Q. Zhou, Tsong Yueh Chen Jan 2019

Metamorphic Relations For Detection Of Performance Anomalies, Owen Johnston, Darryl C. Jarman, Jeffrey Berry, Zhi Q. Zhou, Tsong Yueh Chen

Faculty of Engineering and Information Sciences - Papers: Part B

Metamorphic relations can be used to improve performance testing by comparing successive runs of the software under test. We examine one such metamorphic relation for page load times, which we used to discover and repair a race condition in the Adobe Experience Platform Launch Tag Manager. Histograms for page load times had different modalities, which alerted us to the presence of the bug. We discuss the need for performance measures in addition to the popular mean and standard deviation. We describe two approaches to automatically determine modality: Gaussian Mixture Models and the Silverman Test for Multimodality. Metamorphic relations which involve ...

Engineering Students At Day Zero: Selection And Concerns By Gender, Sasha Nikolic, Thomas F. Suesse, Thomas Goldfinch Jan 2019

Engineering Students At Day Zero: Selection And Concerns By Gender, Sasha Nikolic, Thomas F. Suesse, Thomas Goldfinch

Faculty of Engineering and Information Sciences - Papers: Part B

The importance of attracting students to STEM disciplines such as engineering is well understood. Many developed countries are trying to grow numbers in the field by attracting a greater proportion of females than currently exists. This study explores student engineering selection decisions and initial concerns by gender prior to official commencement of classes within common first year engineering.

Microencapsulation Of Paraffin With Poly (Urea Methacrylate) Shell For Solar Water Heater, Weiguang Su, Yilin Li, Tongyu Zhou, Jo Darkwa, Georgios Kokogiannakis, Zhao Li Jan 2019

Microencapsulation Of Paraffin With Poly (Urea Methacrylate) Shell For Solar Water Heater, Weiguang Su, Yilin Li, Tongyu Zhou, Jo Darkwa, Georgios Kokogiannakis, Zhao Li

Faculty of Engineering and Information Sciences - Papers: Part B

Previous research has demonstred that microencapsulated phase change materials (MEPCMs) could significantly increase the energy storage density of solar thermal energy storage (TES) systems. Compared with traditional phase change materials (PCMs), MEPCMs have many advantages since they can limit their exposure to the surrounding environment, enlarge the heat transfer area, and maintain the volume as the phase change occurs. In this study, a new MEPCM for solar TES systems is developed by encapsulation of paraffin wax with poly (urea formaldehyde) (PUF). The experimental results revealed that agglomeration of MEPCM particles occurred during the encapsulation process which affected the uniformity of ...

A New Switched State Jump Observer For Traffic Density Estimation In Expressways Based On Hybrid-Dynamic-Traffic-Network-Model, Wenbin Zha, Yuqi Guo, Huawei Wu, Miguel Sotelo, Yulin Ma, Qian Yi, Zhixiong Li, Xin Sun Jan 2019

A New Switched State Jump Observer For Traffic Density Estimation In Expressways Based On Hybrid-Dynamic-Traffic-Network-Model, Wenbin Zha, Yuqi Guo, Huawei Wu, Miguel Sotelo, Yulin Ma, Qian Yi, Zhixiong Li, Xin Sun

Faculty of Engineering and Information Sciences - Papers: Part B

When faced with problems such as traffic state estimation, state prediction, and congestion identification for the expressway network, a novel switched observer design strategy with jump states is required to reconstruct the traffic scene more realistically. In this study, the expressway network is firstly modeled as the special discrete switched system, which is called the piecewise affine system model, a partition of state subspace is introduced, and the convex polytopes are utilized to describe the combination modes of cells. Secondly, based on the hybrid dynamic traffic network model, the corresponding switched observer (including state jumps) is designed. Furthermore, by applying ...

On Tetragonality Of The Martensite Crystal Lattice In Steels, V Lobodyuk, Yu Ya Meshkov, Elena V. Pereloma Jan 2019

On Tetragonality Of The Martensite Crystal Lattice In Steels, V Lobodyuk, Yu Ya Meshkov, Elena V. Pereloma

Faculty of Engineering and Information Sciences - Papers: Part B

This article addresses the pseudo-tetragonal nature of the crystal lattice of martensite in carbon-containing steels. It is proposed that the periodic distortion of c-cube edges by the presence of carbon atoms is better reflected in the root-mean-square distortions of martensite lattice than by the value of doublet splitting of the corresponding X-ray reflections of the martensite crystal.

Knowledge-Aided Target Detection For Multistatic Passive Radar, Guohao Sun, Wei Zhang, Jun Tong, Zishu He, Zhihang Wang Jan 2019

Knowledge-Aided Target Detection For Multistatic Passive Radar, Guohao Sun, Wei Zhang, Jun Tong, Zishu He, Zhihang Wang

Faculty of Engineering and Information Sciences - Papers: Part B

This paper studies the detection problem for multistatic passive radar. We consider scenarios where prior knowledge about the spectrum and peak-to-average ratio (PAR) of the non-cooperative illuminators of opportunity (IOs) is available. We develop several knowledge-aided (KA) detectors within the framework of the generalized likelihood ratio test (GLRT) to exploit such prior knowledge. Particularly, the knowledge about the bandwidth of the transmitted signal is employed to suppress the out-of-band noise, and the knowledge about the PAR constraint is exploited to eliminate the remaining high-power noise. The challenge of unknown spectrum condition is also addressed, where block sparse Bayesian learning (BSBL ...

Gpr Target Detection By Joint Sparse And Low-Rank Matrix Decomposition, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Canicious Abeynayake Jan 2019

Gpr Target Detection By Joint Sparse And Low-Rank Matrix Decomposition, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Canicious Abeynayake

Faculty of Engineering and Information Sciences - Papers: Part B

Ground penetrating radar (GPR) uses electromagnetic waves to image, locate, and identify changes in electric and magnetic properties in the ground. The received signal comprises not only the target echoes but also strong reflections from the rough, uneven ground surface, which impair subsurface inspections and visualization of buried objects. In this paper, a background clutter mitigation and target detection method using low-rank and sparse priors is proposed for GPR data. The radar signal is decomposed into the sum of a low-rank component and a sparse component, plus noise. The low-rank component captures the ground surface reflections and background clutter, whereas ...

Equilibrium States And Growth Of Quasi-Lattice Ordered Monoids, Christopher M. Bruce, Marcelo Laca, Jacqui Ramagge, Aidan Sims Jan 2019

Equilibrium States And Growth Of Quasi-Lattice Ordered Monoids, Christopher M. Bruce, Marcelo Laca, Jacqui Ramagge, Aidan Sims

Faculty of Engineering and Information Sciences - Papers: Part B

Each multiplicative real-valued homomorphism on a quasi-lattice ordered monoid gives rise to a quasi-periodic dynamics on the associated Toeplitz $C^*$-algebra; here we study the KMS equilibrium states of the resulting $C^*$-dynamical system. We show that under a nondegeneracy assumption on the homomorphism there is a critical inverse temperature $\beta _c$ such that at each inverse temperature $\beta \geq \beta _c$ there exists a unique KMS state. Strictly above $\beta _c$, the KMS states are generalised Gibbs states with density operators determined by analytic extension to the upper half-plane of the unitaries implementing the dynamics. These are faithful Type ...

Accuracy Of Low-Dose Proton Ct Image Registration For Pretreatment Alignment Verification In Reference To Planning Proton Ct, R Cassetta, Pierluigi Piersimoni, Marco Riboldi, Valentina Giacometti, Vladimir Bashkirov, Guido Baroni, Caesar Ordonez, G Coutrakon, Reinhard W. Schulte Jan 2019

Accuracy Of Low-Dose Proton Ct Image Registration For Pretreatment Alignment Verification In Reference To Planning Proton Ct, R Cassetta, Pierluigi Piersimoni, Marco Riboldi, Valentina Giacometti, Vladimir Bashkirov, Guido Baroni, Caesar Ordonez, G Coutrakon, Reinhard W. Schulte

Faculty of Engineering and Information Sciences - Papers: Part B

Purpose: Proton CT (pCT) has the ability to reduce inherent uncertainties in proton treatment by directly measuring the relative proton stopping power with respect to water, thereby avoiding the uncertain conversion of X-ray CT Hounsfield unit to relative stopping power and the deleterious effect of X- ray CT artifacts. The purpose of this work was to further evaluate the potential of pCT for pretreatment positioning using experimental pCT data of a head phantom. Methods: The performance of a 3D image registration algorithm was tested with pCT reconstructions of a pediatric head phantom. A planning pCT simulation scan of the phantom ...

Preliminary Epi-Diode Characterization For Hdr Brachytherapy Quality Assurance, Anna Romanyukha, Mauro Carrara, Dean L. Cutajar, Marco Petasecca, Iolanda Fuduli, Tebarak Al-Salmani, Michael L. F Lerch, Vladimir Perevertaylo, Davide Mazzeo, Annamaria Cerrotta, Carlo Fallai, Emanuele Pignoli, Anatoly B. Rosenfeld Jan 2019

Preliminary Epi-Diode Characterization For Hdr Brachytherapy Quality Assurance, Anna Romanyukha, Mauro Carrara, Dean L. Cutajar, Marco Petasecca, Iolanda Fuduli, Tebarak Al-Salmani, Michael L. F Lerch, Vladimir Perevertaylo, Davide Mazzeo, Annamaria Cerrotta, Carlo Fallai, Emanuele Pignoli, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

High Dose Rate vaginal brachytherapy for endometrial cancer has evolved from simple single-channel (i.e. cylindrical applicator) deliveries to treatments involving several channels (i.e. multichannel applicator) for the radiotherapy source to dwell, increasing the complexity of the dose distribution, and allowing more space for potential errors. For this reason real-time treatment verification has gained a greater importance than ever before, and more methods need to be developed in order to provide assurance that the dose delivery has been carried out as intended by the hospital staff. P-type silicon epi diodes have been designed at the Centre for Medical Radiation ...

Sabr In Clinical Trials: What Quality Assurance (Qa) Is Required And How Can It Be Done?, Tomas Kron, Nicholas G. Hardcastle Jan 2019

Sabr In Clinical Trials: What Quality Assurance (Qa) Is Required And How Can It Be Done?, Tomas Kron, Nicholas G. Hardcastle

Faculty of Engineering and Information Sciences - Papers: Part B

Stereotactic Ablative Body Radiotherapy (SABR) has become widely used radiotherapy treatment modality for many indications ranging from early stage disease to an oligometastatic setting. All this combines the use of virtually all technological advances that characterise modern radiotherapy from small conformal fields to intensity modulation and explicit accounting for motion. However, given its novelty, clinical evidence for SABR is still emerging and many clinical trails include SABR as the intervention to define (eg in dose or fractionation defining studies) or to test against other treatment modalities. In any case, physical quality assurance (QA) must be an essential aspect of the ...