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Tilak Dias   Professor  University Educator/Researcher 
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Tilak Dias published an article in January 2019.
Top co-authors See all
Matthias Schwab

375 shared publications

Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology; Stuttgart Germany

Elvar Theodorsson

308 shared publications

Department of Clinical and Experimental Medicine, Linköping University, Sweden

Marcello Tiseo

205 shared publications

From the University of Colorado Cancer Center, Aurora (D.R.C.); Division of Medical Oncology, Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine (H.R.K.), Samsung Medical Center (M.-J.A.), and Seoul National University Hospital (D.-W.K.), Seoul, National Cancer Center, Goyang (J.-Y.H.), Seoul National University Bundang Hospital, Seongnam (J.-S.L.), and Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju (K.H.L.) —...

Glen McHale

186 shared publications

Smart Materials & Surfaces Laboratory, Faculty of Engineering & Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, U.K.

Mario Pazzagli

149 shared publications

Department of Biomedical, Experimental and Clinical Sciences, University of Florence, Florence, Italy

Publication Record
Distribution of Articles published per year 
(2008 - 2019)
Total number of journals
published in
Publications See all
Article 0 Reads 0 Citations A Novel Method for Embedding Semiconductor Dies within Textile Yarn to Create Electronic Textiles Mohamad-Nour Nashed, Dorothy Anne Hardy, Theodore Hughes-Ril... Published: 26 January 2019
Fibers, doi: 10.3390/fib7020012
DOI See at publisher website ABS Show/hide abstract
Electronic yarns (E-yarns) contain electronics fully incorporated into the yarn’s structure prior to textile or garment production. They consist of a conductive core made from a flexible, multi-strand copper wire onto which semiconductor dies or MEMS (microelectromechanical systems) are soldered. The device and solder joints are then encapsulated within a resin micro-pod, which is subsequently surrounded by a textile sheath, which also covers the copper wires. The encapsulation of semiconductor dies or MEMS devices within the resin polymer micro-pod is a critical component of the fabrication process, as the micro-pod protects the dies from mechanical and chemical stresses, and hermetically seals the device, which makes the E-yarn washable. The process of manufacturing E-yarns requires automation to increase production speeds and to ensure consistency of the micro-pod structure. The design and development of a semi-automated encapsulation unit used to fabricate the micro-pods is presented here. The micro-pods were made from a ultra-violet (UV) curable polymer resin. This work details the choice of machinery and methods to create a semi-automated encapsulation system in which incoming dies were detected then covered in resin micro-pods. The system detected incoming 0402 metric package dies with an accuracy of 87 to 98%.
Article 2 Reads 1 Citation Photodiodes embedded within electronic textiles Achala Satharasinghe, Theodore Hughes-Riley, Tilak Dias Published: 01 November 2018
Scientific Reports, doi: 10.1038/s41598-018-34483-8
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A novel photodiode-embedded yarn has been presented and characterized for the first time, offering new possibilities for applications including monitoring body vital signs (including heart rate, blood oxygen and skin temperature) and environmental conditions (light, humidity and ultraviolet radiation). To create an E-Textile integrated with electronic devices that is comfortable, conformal, aesthetically pleasing and washable, electronic components are best integrated within the structure of a textile fabric in yarn form. The device is first encapsulated within a protective clear resin micro-pod before being covered in a fibrous sheath. The resin micro-pod and covering fibres have a significant effect on the nature of light received by the photoactive region of the device. This work characterised the effects of both encapsulating photodiodes within resin micro-pods and covering the micro-pod with a fibrous sheath on the opto-electronic parameters. A theoretical model is presented to provide an estimate for these effects and validated experimentally using two photodiode types and a range of different resin micro-pods. This knowledge may have wider applications to other devices with small-scale opto-electronic components. Wash tests confirmed that the yarns could survive multiple machine wash and drying cycles without deterioration in performance.
Article 0 Reads 2 Citations A Wearable Textile Thermograph Pasindu Lugoda, Theodore Hughes-Riley, Rob Morris, Tilak Dia... Published: 21 July 2018
Sensors, doi: 10.3390/s18072369
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In medicine, temperature changes can indicate important underlying pathologies such as wound infection. While thermographs for the detection of wound infection exist, a textile substrate offers a preferable solution to the designs that exist in the literature, as a textile is very comfortable to wear. This work presents a fully textile, wearable, thermograph created using temperature-sensing yarns. As described in earlier work, temperature-sensing yarns are constructed by encapsulating an off-the-shelf thermistor into a polymer resin micro-pod and then embedding this within the fibres of a yarn. This process creates a temperature-sensing yarn that is conformal, drapeable, mechanically resilient, and washable. This work first explored a refined yarn design and characterised its accuracy to take absolute temperature measurements. The influence of contact errors with the refined yarns was explored seeing a 0.24 ± 0.03 measurement error when the yarn was held just 0.5 mm away from the surface being measured. Subsequently, yarns were used to create a thermograph. This work characterises the operation of the thermograph under a variety of simulated conditions to better understand the functionality of this type of textile temperature sensor. Ambient temperature, insulating material, humidity, moisture, bending, compression and stretch were all explored. This work is an expansion of an article published in The 4th International Conference on Sensor and Applications.
Article 0 Reads 1 Citation Developing Novel Temperature Sensing Garments for Health Monitoring Applications Pasindu Lugoda, Theodore Hughes-Riley, Carlos Oliveira, Rob ... Published: 10 July 2018
Fibers, doi: 10.3390/fib6030046
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Embedding temperature sensors within textiles provides an easy method for measuring skin temperature. Skin temperature measurements are an important parameter for a variety of health monitoring applications, where changes in temperature can indicate changes in health. This work uses a temperature sensing yarn, which was fully characterized in previous work, to create a series of temperature sensing garments: armbands, a glove, and a sock. The purpose of this work was to develop the design rules for creating temperature sensing garments and to understand the limitations of these devices. Detailed design considerations for all three devices are provided. Experiments were conducted to examine the effects of contact pressure on skin contact temperature measurements using textile-based temperature sensors. The temperature sensing sock was used for a short user trial where the foot skin temperature of five healthy volunteers was monitored under different conditions to identify the limitations of recording textile-based foot skin temperature measurements. The fit of the sock significantly affected the measurements. In some cases, wearing a shoe or walking also heavily influenced the temperature measurements. These variations show that textile-based foot skin temperature measurements may be problematic for applications where small temperature differences need to be measured.
Article 0 Reads 5 Citations A Historical Review of the Development of Electronic Textiles Theodore Hughes-Riley, Tilak Dias, Colin Cork Published: 31 May 2018
Fibers, doi: 10.3390/fib6020034
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Textiles have been at the heart of human technological progress for thousands of years, with textile developments closely tied to key inventions that have shaped societies. The relatively recent invention of electronic textiles is set to push boundaries again and has already opened up the potential for garments relevant to defense, sports, medicine, and health monitoring. The aim of this review is to provide an overview of the key innovative pathways in the development of electronic textiles to date using sources available in the public domain regarding electronic textiles (E-textiles); this includes academic literature, commercialized products, and published patents. The literature shows that electronics can be integrated into textiles, where integration is achieved by either attaching the electronics onto the surface of a textile, electronics are added at the textile manufacturing stage, or electronics are incorporated at the yarn stage. Methods of integration can have an influence on the textiles properties such as the drapability of the textile.
Article 1 Read 3 Citations Developing an Acoustic Sensing Yarn for Health Surveillance in a Military Setting Theodore Hughes-Riley, Tilak Dias Published: 17 May 2018
Sensors, doi: 10.3390/s18051590
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Overexposure to high levels of noise can cause permanent hearing disorders, which have a significant adverse effect on the quality of life of those affected. Injury due to noise can affect people in a variety of careers including construction workers, factory workers, and members of the armed forces. By monitoring the noise exposure of workers, overexposure can be avoided and suitable protective equipment can be provided. This work focused on the creation of a noise dosimeter suitable for use by members of the armed forces, where a discrete dosimeter was integrated into a textile helmet cover. In this way the sensing elements could be incorporated very close to the ears, providing a highly representative indication of the sound level entering the body, and also creating a device that would not interfere with military activities. This was achieved by utilising commercial microelectromechanical system microphones integrated within the fibres of yarn to create an acoustic sensing yarn. The acoustic sensing yarns were fully characterised over a range of relevant sound levels and frequencies at each stage in the yarn production process. The yarns were ultimately integrated into a knitted helmet cover to create a functional acoustic sensing helmet cover prototype.