Microstructure encryption and decryption techniques in optical variable and invariable devices in printed documents for security and forensic applications.

Ambadiyil, Sajan; Jayan, K.G.; Prabhu, Radhakrishna; Pillai, V.P. Mahadevan

doi:10.1117/12.2179635

Maximising inductive power transmission using a novel analytical coil design approach. (2019)
Conference Proceeding
HEIDARIAN, M., BURGESS, S.J., PRABHU, R. and FOUGH, N. 2019. Maximising inductive power transmission using a novel analytical coil design approach. In Proceedings of the 2019 IEEE MTT-S wireless power transfer conference (WPTC 2019), co-located with the 2019 IEEE PELS workshop on emerging technologies: wireless power (WoW 2019) as part of Wireless power week 2019, 18-21 June 2019, London, UK. New York: IEEE [online], pages 158-161. Available from: https://doi.org/10.1109/WPTC45513.2019.9055553

Maximising power transfer efficiency (PTE) in resonant inductive power transfer (IPT) systems requires strong coupling between transmitter and receiver coils. In applications where system constraints yield a weak inductive link (e.g. significant dist... Read More about Maximising inductive power transmission using a novel analytical coil design approach..

Optimal coil design for maximum power transfer efficiency in resonantly coupled systems. (2019)
Conference Proceeding
HEIDARIAN, M., BURGESS, S.J., PRABHU, R. and FOUGH, N. 2019. Optimal coil design for maximum power transfer efficiency in resonantly coupled systems. In Proceedings of 2019 United States National Committee for the International Union for Radio Science (USNC-URSI) radio science meeting (URSI 2019), co-located with 2019 Antennas and propagation symposium (AP-S/URSI 2019), 7-12 July 2019, Atlanta, USA. Piscataway: IEEE [online], pages 73-74. Available from: https://doi.org/10.1109/USNC-URSI.2019.8861834

Maintaining maximum power transfer efficiency (PTE) is one of the main challenges in resonant inductive power transfer (IPT) systems. Maximum PTE can be achieved if the coupling between transmitter and receiver coils is strong. One way of achieving t... Read More about Optimal coil design for maximum power transfer efficiency in resonantly coupled systems..

Nile red-dye based analysis of synthetic fibres for forensic applications. (2019)
Conference Proceeding
DEVALLA, S., JOSEPH, O. and PRABHU, R. 2019. Nile red-dye based analysis of synthetic fibres for forensic applications. In Bouma, H., Prabhu, R., Stokes, R.J. and Yitzhaky, Y. (eds.) Proceedings of the 3rd Counterterrorism, crime fighting, forensics, and surveillance technologies conference 2019: co-located with the Society of Photo-Optical Instrumentation Engineers (SPIE) Security and defence 2019 conference, 9-12 September 2019, Strasbourg, France. Proceedings of the SPIE, 11166. Bellingham, WA: SPIE [online], article ID 111660Y. Available from: https://doi.org/10.1117/12.2536780

Forensic evaluation of crime scenes normally involves examination of textile fibers, to find out the association between an individual and a crime scene, or between a suspect and a victim. The forensic samples normally include a mix of various types,... Read More about Nile red-dye based analysis of synthetic fibres for forensic applications..

Fluorescence lifetime assisted enhanced security feature in travel documents for border control and security applications. (2019)
Conference Proceeding
JOHNY, J., OFFICER, S., FUNG, W. K. and PRABHU, R. 2019. Fluorescence lifetime assisted enhanced security feature in travel documents for border control and security applications. In Bouma, H., Prabhu, R., Stokes, R.J. and Yitzhaky, Y. (eds.) Proceedings of the 3rd Counterterrorism, crime fighting, forensics, and surveillance technologies conference 2019: co-located with the Society of Photo-Optical Instrumentation Engineers (SPIE) Security and defence 2019 conference, 9-12 September 2019, Strasbourg, France. Proceedings of the SPIE, 11166. Bellingham, WA: SPIE [online], article ID 1116608. Available from: https://doi.org/10.1117/12.2535742

Border management and security challenges are increasing considerably in recent years. One of the major concerns is counterfeiting and fraudulent use of identity and other travel documents for crossing border controls. This poses serious threats and... Read More about Fluorescence lifetime assisted enhanced security feature in travel documents for border control and security applications..

Generalized small-signal modelling of dual active bridge DC/DC converter. (2018)
Conference Proceeding
HEBALA, O.M., ABOUSHADY, A.A., AHMED, K.H., BURGESS, S. and PRABHU, R. 2018. Generalized small-signal modelling of dual active bridge DC/DC converter. In Proceedings of the 7th International conference on renewable energy research and applications (ICRERA 2018), 14-17 October 2018, Paris, France. Piscataway: IEEE [online], article ID 8567014, pages 914-919. Available from: https://doi.org/10.1109/ICRERA.2018.8567014

This paper presents a novel generalised approach of the small-signal modelling of dual active bridge (DAB) DC/DC converter. The adopted analysis is based on a per-unit fundamental frequency representation of the DAB. The outcome of the proposed model... Read More about Generalized small-signal modelling of dual active bridge DC/DC converter..

Confidence-based underwater localization scheme for large-scale mobile sensor networks. (2018)
Conference Proceeding
SABRA, A., FUNG, W.-K. and RADHAKRISHNA, P. 2018. Confidence-based underwater localization scheme for large-scale mobile sensor networks. In Proceedings of the 2018 Marine Technology Society and Institute of Electrical and Electronics Engineers (MTS/IEEE) OCEANS conference (OCEANS 2018 MTS/IEEE), 22-25 October 2018, Charleston, USA. Piscataway, NJ: IEEE [online], article ID 8604878. Available from: https://doi.org/10.1109/OCEANS.2018.8604878

The absence of Global Positioning System in underwater environment predominates in the challenges of underwater vehicles navigation or sensor nodes tracking. Localization of single or few underwater vehicles has been fostered in recent years. However... Read More about Confidence-based underwater localization scheme for large-scale mobile sensor networks..

Waveguide-based machine readable fluorescence security feature for border control and security applications. (2018)
Conference Proceeding
JOHNY, J., BHAVSAR, K., OFFICER, S., ADAMS, M., PRABHU, R. 2018. Waveguide-based machine readable fluorescence security feature for border control and security applications. In Bouma, H., Prabhu, R., Stokes, R.J. and Yitzhaky, Y. (eds.) Proceedings of the 2nd Counterterrorism, crime fighting, forensics and surveillance technologies 2018 conference: co-located with the Society of Photo-optical Instrumentation Engineers (SPIE) Security and defence conference 2018, 10-13 September 2018, Berlin, Germany. Proceedings of the (SPIE), 10802. Bellingham, WA: SPIE [online], article ID 1080209. Available from: https://doi.org/10.1117/12.2501974

Border security challenges and immigration issues are increasing considerably in recent years. Counterfeiting and fraudulent use of identity and other travel documents are posing serious threats and safety concerns worldwide, ever since the advanceme... Read More about Waveguide-based machine readable fluorescence security feature for border control and security applications..

Feasibility analysis of unique ID (UID) generation for personal authentication of valuable documents using dorsal hand vein pattern. (2018)
Conference Proceeding
AMBADIYIL, S., JAYARAIAN, R., PILLAI, V.P.M. and PRABHU, R. 2018. Feasibility analysis of unique ID (UID) generation for personal authentication of valuable documents using dorsal hand vein pattern. In Bouma, H., Prabhu, R., Stokes, R.J. and Yitzhaky, Y. (eds.) Proceedings of the 2nd Counterterrorism, crime fighting, forensics and surveillance technologies 2018 conference: co-located with the Society of Photo-optical Instrumentation Engineers (SPIE) Security and defence conference 2018, 10-13 September 2018, Berlin, Germany. Proceedings of the SPIE, 10802. Bellingham, WA: SPIE [online], article ID 108020H. Available from: https://doi.org/10.1117/12.2325346

Reliable personal authentication is a critical and vital obligation to the security in all the real-world applications. Nevertheless, biometric features are effectively used for the personal authentication, in some cases the criminal impersonation is... Read More about Feasibility analysis of unique ID (UID) generation for personal authentication of valuable documents using dorsal hand vein pattern..

Design optimization of Cassegrain telescope for remote explosive trace detection. (2017)
Conference Proceeding
BHAVSAR, K., ESELLER, K.E. and PRABHU, R. 2017. Design optimization of Cassegrain telescope for remote explosive trace detection. In Bourma, H., Carlysle-Davies, F., Stokes, R.J. and Yitzhaky, Y. (eds.) Proceedings of the 1st Counterterrorism, crime fighting, forensics and surveillance technologies conference 2017: co-located with the Society of Photo-optical Instrumentation Engineers (SPIE) Security and defence 2017 conference, 11-12 September 2017, Warsaw, Poland. Proceedings of SPIE, 10441. Bellingham, WA: SPIE [online], article number 1044103. Available from: https://doi.org/10.1117/12.2277932

The past three years have seen a global increase in explosive-based terror attacks. The widespread use of improvised explosives and anti-personnel landmines have caused thousands of civilian casualties across the world. Current scenario of globalized... Read More about Design optimization of Cassegrain telescope for remote explosive trace detection..

Banknote authentication using chaotic elements technology. (2017)
Conference Proceeding
AMBADIYIL, S., KRISHNENDU, P.S., PILLAI, V.P.M. and PRABHU, R. 2017. Banknote authentication using chaotic elements technology. In Bourma, H., Carlysle-Davies, F., Stokes, R.J. and Yitzhaky, Y. (eds.) Proceedings of the 1st Counterterrorism, crime fighting, forensics and surveillance technologies conference 2017: co-located with the Society of Photo-optical Instrumentation Engineers (SPIE) Security and defence 2017 conference, 11-12 September 2017, Warsaw, Poland. Proceedings of SPIE, 10441. Bellingham, WA: SPIE [online], article number 1044104. Available from: https://doi.org/10.1117/12.2278343

The counterfeit banknote is a growing threat to the society since the advancements in the field of computers, scanners and photocopiers, as they have made the duplication process for banknote much simpler. The fake note detection systems developed so... Read More about Banknote authentication using chaotic elements technology..

Integrated self-healing of the composite offshore structures. (2017)
Conference Proceeding
GUPTA, R., PANCHOLI, K., PRABHU, R., PANCHOLI, M., HUO, D., JHA, V. and LATTO, J. 2017. Integrated self-healing of the composite offshore structures. In Proceedings of OCEANS 2017, 19-22 June 2017, Aberdeen, UK. New York: IEEE [online], article number 8084828, pages 1514-1517. Available from: https://doi.org/10.1109/OCEANSE.2017.8084828

The self-repairing composite materials integrated with sensing is way forward to reduce maintenance cost and increase consumer safety. In this work, the novel self-healing carbon fibre reinforced unidirectional bulk tape of simple architecture is pre... Read More about Integrated self-healing of the composite offshore structures..

Fibre optic sensor to detect heavy metal pollutants in water environments. (2017)
Conference Proceeding
BHAVSAR, K., HURSTON, E., PRABHU, R. and JOSEPH, G.P. 2017. Fibre optic sensor to detect heavy metal pollutants in water environments. In Proceedings of OCEANS 2017, 19-22 June 2017, Aberdeen, UK. New York: IEEE [online], article number 8084982, pages 2441-2444. Available from: https://doi.org/10.1109/OCEANSE.2017.8084982

Heavy metal ion pollution emerges as a potential threat to humankind and the ecosystem due to their increased spreading into the environment. Detection of highly toxic heavy metal ions requires rapid, simple, sensitive and selective detection methods... Read More about Fibre optic sensor to detect heavy metal pollutants in water environments..

Theoretical investigation of positional influence of FBG sensors for structural health monitoring of offshore structures. (2017)
Conference Proceeding
JOHNY, J., SUMMERS, J., BHAVSAR, K., JOSEPH, G.P., FUNG, W.-K. and PRABHU, R. 2017. Theoretical investigation of positional influence of FBG sensors for structural health monitoring of offshore structures. In Proceedings of OCEANS 2017, 19-22 June 2017, Aberdeen, UK. New York: IEEE [online], article number 8084976, pages 2406-2410. Available from: https://doi.org/10.1109/OCEANSE.2017.8084976

Fibre Bragg Grating (FBG) is a key technology for condition monitoring of different offshore oil and gas structures. FBG sensors are used to sense different physical parameters such as strain, temperature, vibration, etc. This paper investigates the... Read More about Theoretical investigation of positional influence of FBG sensors for structural health monitoring of offshore structures..

Design of optical fibre based highly sensitive acoustic sensor for underwater applications. (2017)
Conference Proceeding
JOHNY, J., SMITH, T., BHAVSAR, K. and PRABHU, R. 2017. Design of optical fibre based highly sensitive acoustic sensor for underwater applications. In Proceedings of OCEANS 2017, 19-22 June 2017, Aberdeen, UK. New York: IEEE [online], article number 8084974, pages 2393-2397. Available from: https://doi.org/10.1109/OCEANSE.2017.8084974

Fibre optic sensing is a key technology for a variety of underwater sensing and monitoring applications. Fibre optic acoustic sensors are mainly based on interferometric detection approach where the acoustic pressure-induced phase shift of light has... Read More about Design of optical fibre based highly sensitive acoustic sensor for underwater applications..

Energy efficient operation of photocatalytic reactors based on UV LEDs for pollution remediation in water. (2017)
Conference Proceeding
PRABHU, R., HEWITT, F., GEORGIEVA, G., MEENAKSHI, H.N., LAWTON, L.A. and ROBERTSON, P.K.J. 2017. Energy efficient operation of photocatalytic reactors based on UV LEDs for pollution remediation in water. In Proceedings of OCEANS 2017, 19-22 June 2017, Aberdeen, UK. New York: IEEE [online], article number 8085011, pages 2623-2627. Available from: https://doi.org/10.1109/OCEANSE.2017.8085011

Photocatalytic technology using TiO2 is one of the emerging approaches for water treatment, especially as a final step to remove complex organics such as pesticides, hormones or humic acids. Titanium dioxide (TiO2) is a semiconductor material with st... Read More about Energy efficient operation of photocatalytic reactors based on UV LEDs for pollution remediation in water..

Design of a smart security registration plate for seagoing motorized non-mechanical crafts. (2017)
Conference Proceeding
AMABDIYIL, S., JOSE, S., PILLAI, V.P.M. and PRABHU, R. 2017. Design of a smart security registration plate for seagoing motorized non-mechanical crafts. In Proceedings of OCEANS 2017, 19-22 June 2017, Aberdeen, UK. New York: IEEE [online], article number 8084868, pages 1755-1761. Available from: https://doi.org/10.1109/OCEANSE.2017.8084868

Unauthorized and uncertified small seagoing fishing crafts are being widely used for illegal, unreported and unregulated fishing, especially in the Indian sub-continent. Nevertheless, the registration is mandatory; the display of the registration mar... Read More about Design of a smart security registration plate for seagoing motorized non-mechanical crafts..

Theoretical design and analysis of a sensing system for high pressure and temperature measurement in subsea underwater applications. (2017)
Conference Proceeding
AMOS, S., PRABHU, R. and NJUGUNA, J. 2017. Theoretical design and analysis of a sensing system for high pressure and temperature measurement in subsea underwater applications. In Proceedings of OCEANS 2017, 19-22 June 2017, Aberdeen, UK. New York: IEEE [online], article number 8085023, pages 2680-2686. Available from: https://doi.org/10.1109/OCEANSE.2017.8085023

The theoretical design and analysis of a metal coated hybrid sensing system of Fibre Bragg Grating (FBG) and Extrinsic Fabry-Perot Interferometer (EFPI) cavity for high pressure high temperature (HPHT) measurement in subsea underwater applications is... Read More about Theoretical design and analysis of a sensing system for high pressure and temperature measurement in subsea underwater applications..

Holographic interferometry for security and forensic applications. (2016)
Conference Proceeding
AMBADIYIL, S., SREELEKSHMI, R.C., PILLAI, V.P.M. and PRABHU, R. 2016. Holographic interferometry for security and forensic applications. In Burgess, D., Owen, G., Bouma, H., Carlysle-Davies, F., Stokes, R.J. and Yitzhaky, Y. (eds.) Proceedings of the 12th Optics and photonics for counterterrorims, crime fighting and defence conference 2016: co-located with Society of Photographic Instrumentation Engineers (SPIE) security and defence conference, 26-27 September 2016, Edinburgh, UK. Proceedings of SPIE, 9995. Bellingham: SPIE [online], article ID 999502. Available from: https://doi.org/10.1117/12.2242153

Security holograms having unique 3D images are one of the tools for enhancing the security for product and personnel authentication and anti-counterfeiting. Apart from the high technology that is required, the uniqueness of a 3D object presents a sig... Read More about Holographic interferometry for security and forensic applications..

Investigation of positioning of FBG sensors for smart monitoring of oil and gas subsea structures. (2016)
Conference Proceeding
JOHNY, J., PRABHU, R., FUNG, W.K. and WATSON, J. 2016. Investigation of positioning of FBG sensors for smart monitoring of oil and gas subsea structures. In Proceedings of the 2016 Marine Technology Society/Institute of Electrical and Electronics Engineers (MTS/IEEE) OCEANS conference: our future is with oceans, 10-13 April 2016, Shanghai, China. Piscataway: IEEE [online], paper ID 7485662. Available from: https://dx.doi.org/10.1109/OCEANSAP.2016.7485662

Condition monitoring of offshore structures is an indispensable task in the oil and gas industry. Fibre Bragg Grating (FBG) is the key technology used down-hole in order to sense different physical parameters such as strain, vibration, etc. This pape... Read More about Investigation of positioning of FBG sensors for smart monitoring of oil and gas subsea structures..

Microstructure encryption and decryption techniques in optical variable and invariable devices in printed documents for security and forensic applications. (2015)
Conference Proceeding
AMBADIYIL, S., JAYAN, K.G., PRABHU, R. and PILLAI, V.P.M. 2015. Microstructure encryption and decryption techniques in optical variable and invariable devices in printed documents for security and forensic applications. In Baldini, F., Homola, J and Lieberman, R.A. (eds.) Optical sensors 2015: proceedings of 2015 International Society for Optics and Photonics (SPIE) optics and optoelectronics conference, 13-16 April 2015, Prague, Czech Republic. Proceedings of SPIE, 9506. Bellingham, WA: SPIE [online], 9506OI. Available from: https://doi.org/10.1117/12.2179635

Today, document counterfeiting is a global menace because of the advanced technologies available at ever decreasing prices. Instead of eschew the paper documents; applying efficient cost effective security methodologies are the feasible solutions. Th... Read More about Microstructure encryption and decryption techniques in optical variable and invariable devices in printed documents for security and forensic applications..

All Outputs (42)