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Articles 391 - 402 of 402
Full-Text Articles in Social and Behavioral Sciences
High-Throughput, Sheathless, Magnetophoretic Separation Of Magnetic And Non-Magnetic Particles With A Groove-Based Channel, Sheng Yan, Jie Zhang, Dan Yuan, Qianbin Zhao, J Ma, Weihua Li
High-Throughput, Sheathless, Magnetophoretic Separation Of Magnetic And Non-Magnetic Particles With A Groove-Based Channel, Sheng Yan, Jie Zhang, Dan Yuan, Qianbin Zhao, J Ma, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part A
The separation of target objects conjugated with magnetic particles is a significant application in biomedicine and clinical diagnosis. Conventional magnetophoresis-based devices use a sheath flow to pre-focus the particles into a single stream and typically operate at a low flow rate. We demonstrate in this work a high-throughput, sheathless, magnetophoretic separation of magnetic and non-magnetic beads in a groove-based channel, and also report on an interesting phenomenon where the same magnetic beads in the same microchannel, but with different setups, has a different particle tracing; a binary mixture of magnetic and non-magnetic beads in a diluted ferrofluid, is then fed …
Subject-Adaptive Integration Of Multiple Sice Brain Networks With Different Sparsity, Jianjia Zhang, Luping Zhou, Lei Wang
Subject-Adaptive Integration Of Multiple Sice Brain Networks With Different Sparsity, Jianjia Zhang, Luping Zhou, Lei Wang
Faculty of Engineering and Information Sciences - Papers: Part A
As a principled method for partial correlation estimation, sparse inverse covariance estimation (SICE) has been employed to model brain connectivity networks, which holds great promise for brain disease diagnosis. For each subject, the SICE method naturally leads to a set of connectivity networks with various sparsity. However, existing methods usually select a single network from them for classification and the discriminative power of this set of networks has not been fully exploited. This paper argues that the connectivity networks at different sparsity levels present complementary connectivity patterns and therefore they should be jointly considered to achieve high classification performance.In this …
On The Index Of A Non-Fredholm Model Operator, Alan L. Carey, Fritz Gesztesy, Galina Levitina, F Sukochev
On The Index Of A Non-Fredholm Model Operator, Alan L. Carey, Fritz Gesztesy, Galina Levitina, F Sukochev
Faculty of Engineering and Information Sciences - Papers: Part A
Let {A(t)}t∈R be a path of self-adjoint Fredholm operators in a Hilbert space H , joining endpoints A± as t → ±∞. Computing the index of the operator DA = ∂ /∂ t + A acting on L2(R;H ), where A denotes the multiplication operator (A f)(t) = A(t) f (t) for f ∈ L2(R;H ) , and its relation to spectral flow along this path, has a long history, but it is mostly focussed on the case where the operators A(t) all have purely discrete spectrum.
Video Enhanced Multiple Choice Questions - Personalising Elearning, Nadine Adams, Anne L. Porter
Video Enhanced Multiple Choice Questions - Personalising Elearning, Nadine Adams, Anne L. Porter
Faculty of Engineering and Information Sciences - Papers: Part A
Instructional videos have been successfully used to teach mathematical concepts to distance students. These videos allow the students to see and hear their lecturer with an added advantage of being able to stop and rewind or replay until the concept is understood. While videos facilitate student understanding, formative assessment provides both lecturer and student with an indication of the latter's mastery of a mathematical concept. Formative assessment with handwritten feedback is viewed as preferential because changing university culture means few academics have the time to provide comprehensive handwritten feedback to large numbers of students for every concept. Further, for this …
Self-Mixing Interferometry And Its Applications, Yanguang Yu, Yuanlong Fan, Bin Liu
Self-Mixing Interferometry And Its Applications, Yanguang Yu, Yuanlong Fan, Bin Liu
Faculty of Engineering and Information Sciences - Papers: Part A
This paper reviews the self-mixing interference (SMI) in terms of its operation principle, the features of SMI signals and its configuration. SMI refers to a phenomenon that occurs when a small fraction of the light emitted by a laser is backscattered or reflected by an external target and re-enters the laser active cavity, thus leading to the modulation of the laser output power. This is a remarkably universal phenomenon, occurring in lasers regardless of type. A few application examples are presented based on the research work done in our group, including SMI sensing for displacement measurement, material parameters and laser …
Evaluation Of Dose From Kv Cone-Beam Computed Tomography During Radiotherapy: A Comparison Of Methodologies, Jarryd Buckley, Dean Wilkinson, Alessandra Malaroda, Peter E. Metcalfe
Evaluation Of Dose From Kv Cone-Beam Computed Tomography During Radiotherapy: A Comparison Of Methodologies, Jarryd Buckley, Dean Wilkinson, Alessandra Malaroda, Peter E. Metcalfe
Faculty of Engineering and Information Sciences - Papers: Part A
Three alternative methodologies to the Computed-Tomography Dose Index for the evaluation of Cone-Beam Computed Tomography dose are compared, the Cone-Beam Dose Index, IAEA Human Health Report No. 5 recommended methodology and the AAPM Task Group 111 recommended methodology. The protocols were evaluated for Pelvis and Thorax scan modes on Varian® On-Board Imager and Truebeam kV XI imaging systems. The weighted planar average dose was highest for the AAPM methodology across all scans, with the CBDI being the second highest overall. A 17.96% and 1.14% decrease from the TG-111 protocol to the IAEA and CBDI protocols for the Pelvis mode and …
Neutron Optics Upgrades To The Residual Stress Diffractometer, Kowari, Mark H. Reid, Scott Olsen, Vladimir Luzin, Mark New, Norman Booth, Douglas Clowes, Tai Nguyen, Ferdi Franceschini, Adrian Ogrin, Steven Pangalis, Ania Paradowska, Nathan P. Larkin, Zengxi Stephen Pan, Nicholas P. Hoye, Hiroshi Suzuki
Neutron Optics Upgrades To The Residual Stress Diffractometer, Kowari, Mark H. Reid, Scott Olsen, Vladimir Luzin, Mark New, Norman Booth, Douglas Clowes, Tai Nguyen, Ferdi Franceschini, Adrian Ogrin, Steven Pangalis, Ania Paradowska, Nathan P. Larkin, Zengxi Stephen Pan, Nicholas P. Hoye, Hiroshi Suzuki
Faculty of Engineering and Information Sciences - Papers: Part A
In the last 5 years a number of significant enhancements have been implemented on the neutron beam strain scanner Kowari at the OPAL reactor in Sydney Australia. These changes have resulted in reduced beam time losses when conducting experiments due to sample and stage alignment, and optics and sample changes. There have been 3 projects, starting in 2011 with a new manual slit system design and collision recovery system, in 2013 with a series of radial collimators and finally with the delivery of a 6 axis robot capable of texture measurements and of running up to 20 samples automatically.
Response Of Static And Cyclic Laterally Loaded Rigid Piles In Sand, Hongyu Qin, Wei Dong Guo
Response Of Static And Cyclic Laterally Loaded Rigid Piles In Sand, Hongyu Qin, Wei Dong Guo
Faculty of Engineering and Information Sciences - Papers: Part A
An experimental investigation was made into response of piles in sand subjected to lateral cyclic loading. Seven instrumented model piles were tested individually. Five tests were conducted under typical magnitude, and number of cycle loading, and two were under static loading. The results were used to deduce modulus of subgrade reaction k and the profile of limiting lateral resistance force per unit length (LFP, pu profile) in light of closed-form solutions. The study demonstrates a large impact of lateral (cyclic) load level than on the number of cycles, a 1.5-2.8 times increase in the modulus k, and a 10% reduction …
A Short Id-Based Proxy Signature Scheme, Maryam Rjabzadeh Asaar, Mahmoud Salmasizadeh, Willy Susilo
A Short Id-Based Proxy Signature Scheme, Maryam Rjabzadeh Asaar, Mahmoud Salmasizadeh, Willy Susilo
Faculty of Engineering and Information Sciences - Papers: Part A
No abstract provided.
Kinematical Limit Analysis For A Slope Reinforced With One Row Of Stabilizing Piles, Shiguo Xiao, Hong He, Jinxiu Zeng
Kinematical Limit Analysis For A Slope Reinforced With One Row Of Stabilizing Piles, Shiguo Xiao, Hong He, Jinxiu Zeng
Faculty of Engineering and Information Sciences - Papers: Part A
Stabilizing piles are commonly used to improve slope stability. The load that a pile should sustain and the associated slip surface under a prescribed factor of safety are two critical design parameters in practice. Based on the kinematically admissible failure mechanism, a limit analysis approach is introduced, which considers two potential slip surfaces that individually lie in the upslope and downslope of the piles. The explicit formulas for the upslope thrust force and downslope resistance on a pile are derived, which enables the calculation of the maximum load on a pile and the corresponding critical slip surfaces using a computer …
Analysis Of The Magnetic Torque On A Tilted Permanent Magnet For Drug Delivery In Capsule Robots, Fredy Munoz, Gursel Alici, Hao Zhou, Weihua Li, Metin Sitti
Analysis Of The Magnetic Torque On A Tilted Permanent Magnet For Drug Delivery In Capsule Robots, Fredy Munoz, Gursel Alici, Hao Zhou, Weihua Li, Metin Sitti
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper, we present the analysis of the torque transmitted to a tilted permanent magnet that is to be embedded in a capsule robot to achieve targeted drug delivery. This analysis is carried out by using an analytical model and experimental results for a small cubic permanent magnet that is driven by an external magnetic system made of an array of arc-shaped permanent magnets (ASMs). Our experimental results, which are in agreement with the analytical results, show that the cubic permanent magnet can safely be actuated for inclinations lower than 75° without having to make positional adjustments in the …
Asl-Incorporated Pharmacokinetic Modelling Of Pet Data With Reduced Acquisition Time: Application To Amyloid Imaging, Catherine L. Scott, Jieqing Jiao, Andrew Melbourne, Jonathan M. Schott, Brian F. Hutton, Sebastien Ourselin
Asl-Incorporated Pharmacokinetic Modelling Of Pet Data With Reduced Acquisition Time: Application To Amyloid Imaging, Catherine L. Scott, Jieqing Jiao, Andrew Melbourne, Jonathan M. Schott, Brian F. Hutton, Sebastien Ourselin
Faculty of Engineering and Information Sciences - Papers: Part A
Pharmacokinetic analysis of Positron Emission Tomography (PET) data typically requires at least one hour of image acquisition, which poses a great disadvantage in clinical practice. In this work, we propose a novel approach for pharmacokinetic modelling with significantly reduced PET acquisition time, by incorporating the blood flow information from simultaneously acquired arterial spin labelling (ASL) magnetic resonance imaging (MRI). A relationship is established between blood flow, measured by ASL, and the transfer rate constant from plasma to tissue of the PET tracer, leading to modified PET kinetic models with ASL-derived flow information. Evaluation on clinical amyloid imaging data from an …