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Articles 481 - 487 of 487
Full-Text Articles in Social and Behavioral Sciences
Correction Factors To Convert Microdosimetry Measurements In Silicon To Tissue In 12C Ion Therapy, David Bolst, Susanna Guatelli, Linh T. Tran, Lachlan Chartier, Michael L. F Lerch, Naruhiro Matsufuji, Anatoly B. Rosenfeld
Correction Factors To Convert Microdosimetry Measurements In Silicon To Tissue In 12C Ion Therapy, David Bolst, Susanna Guatelli, Linh T. Tran, Lachlan Chartier, Michael L. F Lerch, Naruhiro Matsufuji, Anatoly B. Rosenfeld
Faculty of Engineering and Information Sciences - Papers: Part A
Silicon microdosimetry is a promising technology for heavy ion therapy (HIT) quality assurance, because of its sub-mm spatial resolution and capability to determine radiation effects at a cellular level in a mixed radiation field. A drawback of silicon is not being tissue-equivalent, thus the need to convert the detector response obtained in silicon to tissue. This paper presents a method for converting silicon microdosimetric spectra to tissue for a therapeutic 12C beam, based on Monte Carlo simulations. The energy deposition spectra in a 10 μm sized silicon cylindrical sensitive volume (SV) were found to be equivalent to those …
Model-Based Optimization Of Ground Source Heat Pump Systems, Zhenjun Ma, Lei Xia
Model-Based Optimization Of Ground Source Heat Pump Systems, Zhenjun Ma, Lei Xia
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents the development of an optimization strategy for ground source heat pump (GSHP) systems equipped with variable speed pumps in the ground loop system. The optimization problem is formulated using a model-based approach, in which the component models are used to estimate the system performance under various trial settings and an exhaustive search method is used to identify the optimal settings under the search ranges defined. The variable optimized is the outlet water temperature from the ground heat exchangers, which can be used as a set-point to control the operation of the variable speed pumps in the ground …
Thermal Comfort Evaluation Of A Mixed-Mode Ventilated Office Building With Advanced Natural Ventilation And Underfloor Air Distribution Systems, Xiang Deng, Georgios Kokogiannakis, Zhenjun Ma, Paul Cooper
Thermal Comfort Evaluation Of A Mixed-Mode Ventilated Office Building With Advanced Natural Ventilation And Underfloor Air Distribution Systems, Xiang Deng, Georgios Kokogiannakis, Zhenjun Ma, Paul Cooper
Faculty of Engineering and Information Sciences - Papers: Part A
This study uses field monitoring and post occupancy evaluation (POE) surveys to investigate the indoor thermal comfort of an office building that is located in subtropical zone. The building is special as it combines advanced natural ventilation (ANV) strategies and underfloor air distribution (UFAD) systems. A comparison between a static thermal comfort model and a dynamic thermal comfort model is also conducted. The results show that the thermal comfort conditions in the case study building are satisfactory in summer while in winter there is evidence of thermal discomfort. For the case study building, the static thermal comfort model gives outputs …
Reproducible Bubble-Induced Acoustic Microstreaming For Bead Disaggregation And Immunoassay In Microfluidics, Huaying Chen, Yuan Gao, Karolina Petkovic, Sheng Yan, Michael Best, Yanping Du, Yonggang Zhu
Reproducible Bubble-Induced Acoustic Microstreaming For Bead Disaggregation And Immunoassay In Microfluidics, Huaying Chen, Yuan Gao, Karolina Petkovic, Sheng Yan, Michael Best, Yanping Du, Yonggang Zhu
Faculty of Engineering and Information Sciences - Papers: Part A
The bead-based immunoassay requires not only efficient mixing but also good control of bead-surface-area-to-sample-volume ratio to realise accurate and reproducible detection of low concentration samples. This paper reports the development of a microfluidic platform with the reproducible and efficient bubble-induced micromixing for bead disaggregation and immunoassay of prostate-specific antigen (PSA). The platform consists of a microfluidic chip with a microchamber and rectangular traps for capturing air bubbles and a home-made controller to generate sound wave using an external piezo transducer. Methods for reproducible bubble formation and bubble size control during mixing are explored. The influence of driving voltage, PDMS thickness …
The Integration Of Mri In Radiation Therapy: Collaboration Of Radiographers And Radiation Therapists, Robba Rai, Shivani Kumar, Vikneswary Batumalai, Doaa Elwadia, Lucy Ohanessian, Ewa Juresic, Lynette Cassapi, Shalini K. Vinod, Lois C. Holloway, Paul J. Keall, Gary P. Liney
The Integration Of Mri In Radiation Therapy: Collaboration Of Radiographers And Radiation Therapists, Robba Rai, Shivani Kumar, Vikneswary Batumalai, Doaa Elwadia, Lucy Ohanessian, Ewa Juresic, Lynette Cassapi, Shalini K. Vinod, Lois C. Holloway, Paul J. Keall, Gary P. Liney
Faculty of Engineering and Information Sciences - Papers: Part A
The increased utilisation of magnetic resonance imaging (MRI) in radiation therapy (RT) has led to the implementation of MRI simulators for RT treatment planning and influenced the development of MRI-guided treatment systems. There is extensive literature on the advantages of MRI for tumour volume and organ-at-risk delineation compared to computed tomography. MRI provides both anatomical and functional information for RT treatment planning (RTP) as well as quantitative information to assess tumour response for adaptive treatment. Despite many advantages of MRI in RT, introducing an MRI simulator into a RT department is a challenge. Collaboration between radiographers and radiation therapists is …
Radiation Response And Basic Dosimetric Characterisation Of The 'Magic Plate', Z A. Alrowaili, Michael L. F Lerch, Marco Petasecca, Martin G. Carolan, Anatoly B. Rosenfeld
Radiation Response And Basic Dosimetric Characterisation Of The 'Magic Plate', Z A. Alrowaili, Michael L. F Lerch, Marco Petasecca, Martin G. Carolan, Anatoly B. Rosenfeld
Faculty of Engineering and Information Sciences - Papers: Part A
Two Dimensional (2D) silicon diode arrays are often implemented in radiation therapy quality assurance (QA) applications due to their advantages such as: real-time operation (compared to the films), large dynamic range and small size (compared to ionization chambers). The Centre for Medical Radiation Physics, University of Wollongong has developed a multifunctional 2D silicon diode array known as the Magic Plate (MP) for real-time applications and is suitable as a transmission detector for photon flunce mapping (MPTM) or for in phantom dose mapping (MPDM). The paper focusses on the characterisation of the MPDM in terms of output factor and square field …
Effect Of Scattered Electrons On The 'Magic Plate' Transmission Array Detector Response, Z A. Alrowaili, Michael L. F Lerch, Marco Petasecca, Martin G. Carolan, Anatoly B. Rosenfeld
Effect Of Scattered Electrons On The 'Magic Plate' Transmission Array Detector Response, Z A. Alrowaili, Michael L. F Lerch, Marco Petasecca, Martin G. Carolan, Anatoly B. Rosenfeld
Faculty of Engineering and Information Sciences - Papers: Part A
Transmission type detectors can provide a measure of the energy fluence and if they are real-time systems that do not significantly attenuate the radiation beam have a distinct advantage over the current method as Quality Assurance (QA) could in principle be done during the actual patient treatment. The use of diode arrays in QA holds much promise due to real-time operation and feedback when compared to other methods e.g. films which are not real-time. The goal of this work is to describe the characterization of the radiation response of a silicon diode array called the Magic Plate (MP) when operated …