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Ha, Xuan Thao (author), Wu, D. (author), Ourak, Mouloud (author), Borghesan, Gianni (author), Menciassi, Arianna (author), Poorten, Emmanuel Vander (author)Optical fiber-based shape sensing is gaining popularity in cardiac catheterization lately. Typically, these procedures are taking place under the guidance of fluoroscopy. However, fluoroscopy has several disadvantages. Thanks to fiber optic shape sensing and Electromagnetic Tracking (EMT), the 3D catheter shape can now be tracked in real-time...journal article 2023
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Ha, Xuan Thao (author), Wu, D. (author), Ourak, Mouloud (author), Borghesan, Gianni (author), Dankelman, J. (author), Menciassi, Arianna (author), Poorten, Emmanuel Vander (author)In this article, a deep learning method for the shape sensing of continuum robots based on multicore fiber bragg grating (FBG) fiber is introduced. The proposed method, based on an artificial neural network (ANN), differs from traditional approaches, where accurate shape reconstruction requires a tedious characterization of many...journal article 2023
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Ha, Xuan Thao (author), Wu, D. (author), Trauzettel, F. (author), Ourak, Mouloud (author), Borghesan, Gianni (author), Menciassi, Arianna (author), Poorten, Emmanuel Vander (author)Minimally invasive catheter-based interventions normally take place under the guidance of fluoroscopy. However, fluoroscopy is harmful to both patients and clinicians. Moreover, it only offers 2-D shape visualization of flexible devices. To solve the problem of harmful radiation and offer 3-D pose and shape information, recent studies propose...journal article 2023
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Ha, Xuan Thao (author), Wu, D. (author), Lai, C. (author), Ourak, Mouloud (author), Borghesan, Gianni (author), Menciassi, Arianna (author), Vander Poorten, Emmanuel (author)Continuum robots such as robotic catheters are increasingly being used in minimally invasive surgery. Compliance contributes to enhanced safety during e.g. catheter insertion, however, estimation of contact force and location may help clinicians avoiding exerting excessive force. Ultimately this could lead to faster and safer interventions....journal article 2022
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Wu, Y. (author)The Aerosol Optical Depth (AOD), a measure of the scattering and absorption of light by aerosols, has been extensively used for scientific research such as monitoring air quality near the surface due to fine particles aggregated, aerosol radiative forcing (cooling effect against the warming effect by carbon dioxide CO2 ), aerosol long-term trend...doctoral thesis 2018
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Wu, Y. (author), de Graaf, M. (author), Menenti, M. (author)Global quantitative aerosol information has been derived from MODerate Resolution Imaging SpectroRadiometer (MODIS) observations for decades since early 2000 and widely used for air quality and climate change research. However, the operational MODIS Aerosol Optical Depth (AOD) products Collection 6 (C6) can still be biased, because of...journal article 2017
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The Sensitivity of AOD Retrieval to Aerosol Type and Vertical Distribution over Land with MODIS DataWu, Y. (author), de Graaf, M. (author), Menenti, M. (author)This study is to evaluate the sensitivity of Aerosol Optical Depth (AOD <i style="box-sizing: inherit; line-height: inherit; max-height: 100000px; color: rgb(34, 34, 34); font-family: Arial; font-size: 13px; text-align: justify;">τ</i>) to aerosol vertical profile and type, using the Moderate Resolution Imaging Spectroradiometer (MODIS)...journal article 2016
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Emadi, A. (author), Wu, H. (author), De Graaf, G. (author), Wolffenbuttel, R.F. (author)This paper presents the design, fabrication and characterization of Infra-Red (IR) Linear Variable Optical Filter (LVOF)-based micro-spectrometers. Two LVOF microspectrometer designs have been realized: one for operating in the 1400 nm to 2500 nm wavelength range and another between 3000 nm and 5000 nm. The IR LVOFs have been fabricated in an IC...journal article 2013
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Emadi, A. (author), Wu, H. (author), De Graaf, G. (author), Wolffenbuttel, R.F. (author)In this paper the concept of a microspectrometer based on a Linear Variable Optical Filter (LVOF) for operation in the visible spectrum is presented and used in two different designs: the first is for the narrow spectral band between 610 nm and 680 nm, whereas the other is for the wider spectral band between 570 nm and 740 nm. Design...journal article 2011
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Wu, H. (author), Emadi, A. (author), De Graaf, G. (author), Leijtens, J. (author), Wolffenbuttel, R.F. (author)A sun sensor is usually included in a satellite for optically measuring the position relative to the sun. The accuracy of a conventional sun sensor is affected by reflected sunlight at the nearby earth atmosphere: the albedo radiation. The part of the spectrum at near IR (1.5 ?m) is not included in the albedo radiation, due to the high water...journal article 2011
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Emadi, A. (author), Grabarnik, S. (author), Wu, H. (author), De Graaf, G. (author), Hedsten, K. (author), Enoksson, P. (author), Correia, J.H. (author), Wolffenbuttel, R.F. (author)This paper reports on the functional and spectral characterization of a microspectrometer based on a CMOS detector array covered by an IC-Compatible Linear Variable Optical Filter (LVOF). The Fabry-Perot LVOF is composed of 15 dielectric layers with a tapered middle cavity layer, which has been fabricated in an IC-Compatible process using resist...conference paper 2010
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Emadi, A. (author), Wu, H. (author), De Graaf, G. (author), Wolffenbuttel, R.F. (author)This paper reports on a CMOS-Compatible Linear Variable Optical Filter (LVOF) visible micro-spectrometer. The CMOS-compatible post process for fabrication of the LVOF has been used for integration of the LVOF with a CMOS chip containing a 128-element photodiode array and readout circuitry. Fabrication of LVOF involves a process for fabrication...conference paper 2010
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Grabarnik, S. (author), Emadi, A. (author), Wu, H. (author), De Graaf, G. (author), Wolffenbuttel, R.F. (author)A concept for a highly miniaturized spectrometer featuring a two-component design is presented. The first component is a planar chip that integrates an input slit and aberration-correcting diffraction grating with an image sensor and is fabricated using microelectromechanical systems (MEMS) technologies. Due to the fabrication in a simple MEMS...journal article 2008
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- Wu, S. (author) doctoral thesis 1992