A study of the impact of technology-enhanced learning on student academic performance.
Journal Article
Chowdhry, S., Sieler, K., & Alwis, L. (2014)
A study of the impact of technology-enhanced learning on student academic performance. Journal of Perspectives in Applied Academic Practice, 2,
In university education a lot of emphasis is placed on the use of the virtual learning environment (VLE) in teaching to enhance the student learning experience. As a result, t...
Evaluating the Performance of Functionalized Carbon Structures with Integrated Optical Fiber Sensors under Practical Conditions
Journal Article
Bremer, K., Alwis S. M., L., Weigand, F., Kuhne, M., Zheng, Y., Krüger, M., …Roth, B. (2018)
Evaluating the Performance of Functionalized Carbon Structures with Integrated Optical Fiber Sensors under Practical Conditions. Sensors, 18(11), 3923. https://doi.org/10.3390/s18113923
An Optical Frequency Domain Reflectometry (OFDR) based fiber optic sensor scheme “embedded” in concrete for the purpose of structural health monitoring (SHM) of carbon concret...
Design and performance evaluation of polyvinyl alcohol/polyimide coated optical fibre grating-based humidity sensors.
Journal Article
Alwis, L., Sun, T., & Grattan, K. T. V. (2013)
Design and performance evaluation of polyvinyl alcohol/polyimide coated optical fibre grating-based humidity sensors. Review of Scientific Instruments, 84, 25002. https://doi.org/10.1063/1.4789768
Optical fibre grating based sensors make a significant contribution to relative humidity measurement for various applications and a number of different designs and sensor conf...
Evaluation of the durability and performance of FBG-based sensors for monitoring moisture in an aggressive gaseous waste sewer environment
Journal Article
Alwis, L. S. M., Bustamante, H., Bremer, K., Roth, B., Sun, T., & Grattan, K. T. V. (2017)
Evaluation of the durability and performance of FBG-based sensors for monitoring moisture in an aggressive gaseous waste sewer environment. Journal of Lightwave Technology, 35(16), 3380-3386. https://doi.org/10.1109/jlt.2016.2593260
Measurements of the rate of corrosion in concrete sewers need to take into consideration the humidity in the environment and thus its accurate measurement becomes critically i...
Optical Fibre Refractive Index Sensor in a Hybrid Fibre Grating Configuration
Journal Article
Alwis, L., Sun, T., & T.V. Grattan, K. (2015)
Optical Fibre Refractive Index Sensor in a Hybrid Fibre Grating Configuration. Procedia Engineering, 120, 11-14. https://doi.org/10.1016/j.proeng.2015.08.555
A temperature compensated Refractive Index (RI) sensor incorporating a Long Period Grating (LPG) and a Fibre Bragg Grating (FBG) in a series configuration has been developed a...
Determination of the Aspect-ratio Distribution of Gold Nanorods in a Colloidal Solution using UV-visible absorption spectroscopy
Journal Article
Kumar, R., Binetti, L., Nguyen, H. T., Alwis, L. S. M., Agrawal, A., Sun, T., & Grattan, K. T. V. (2019)
Determination of the Aspect-ratio Distribution of Gold Nanorods in a Colloidal Solution using UV-visible absorption spectroscopy. Scientific Reports, 9, https://doi.org/10.1038/s41598-019-53621-4
Knowledge of the distribution of the aspect ratios (ARs) in a chemically-synthesized colloidal solution of Gold Nano Rods (GNRs) is an important measure in determining the qua...
Fibre optic long period grating-based humidity sensor probe using a Michelson interferometric arrangement.
Journal Article
Alwis, L., Sun, T., & Grattan, K. T. V. (2013)
Fibre optic long period grating-based humidity sensor probe using a Michelson interferometric arrangement. Sensors and Actuators B: Chemical, 178, 694-699. https://doi.org/10.1016/j.snb.2012.11.062
Long period gratings (LPG)-based sensors are widely used due to their high sensitivity to a range of suitable measurands. However, a typical configuration involving a single g...
Structural Health Monitoring Using Textile Reinforcement Structures with Integrated Optical Fiber Sensors
Journal Article
Bremer, K., Weigand, F., Zheng, Y., Alwis, L. S., Helbig, R., & Roth, B. (2017)
Structural Health Monitoring Using Textile Reinforcement Structures with Integrated Optical Fiber Sensors. Sensors, 17(2), 345. https://doi.org/10.3390/s17020345
Optical fiber-based sensors " embedded " in functionalized carbon structures (FCSs) and textile net structures (TNSs) based on alkaline-resistant glass are introduced for the ...
Analysis of the Characteristics of PVA-Coated LPG-Based Sensors to Coating Thickness and Changes in the External Refractive Index.
Journal Article
Alwis, L., Bremer, K., Sun, T., & Grattan, K. T. V. (2013)
Analysis of the Characteristics of PVA-Coated LPG-Based Sensors to Coating Thickness and Changes in the External Refractive Index. IEEE Sensors Journal, 13, 1117-1124. https://doi.org/10.1109/JSEN.2012.2230534
Recent research has shown that the transmission spectrum of a long period grating (LPG) written into an optical fiber is sensitive to the thickness and the refractive index (R...
Fibre Grating-based Sensor Design for Humidity Measurement in Chemically Harsh Environment
Journal Article
Alwis, L. S. M., Sun, T., & Grattan, K. T. V. (2016)
Fibre Grating-based Sensor Design for Humidity Measurement in Chemically Harsh Environment. Procedia Engineering, 168, 1317-1320. https://doi.org/10.1016/j.proeng.2016.11.359
A temperature compensated Relative Humidity (RH) sensor incorporating Fibre Bragg Gratings (FBGs) has been developed to be tested in extremely harsh gaseous acidic environment...