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2. Standalone micro-reformer for on-board hydrogen production from dimethyl ether

Author

Bianchini, M., Alayo, N., Soler, L., Salleras, M., Fonseca, L., Llorca, J., and Tarancon, A.

Subjects
Physics - Applied Physics, Condensed Matter - Materials Science
Abstract

Entering a new era of sustainable energy generation and consumption, new solutions for powering consumer electronics are required to tackle the limited capacity provided by the portable power sources employed nowadays. Hydrocarbon-fed micro-fuel cells represent a promising technology for this purpose, and micro-reactor technology can indeed enable their integration for portable applications. In this work, we present the design and fully scalable wafer-level fabrication of a MEMS-based catalytic micro-reactor, paving the way towards on-board hydrogen production for portable power generators. The device consists of an array of thousands of vertically-aligned micro-channels, 500 um in length and 50 um in diameter, for an overall superficial area per unit volume of 120 cm2 cm-3 and it embeds a thin-film heater for efficient reaction start-up. Functionalization of the active area was achieved by atomic layer deposition, resulting in the uniform coating of a Pt/Al2O3 heterogeneous catalyst. The temperature-dependent dimethyl ether (DME)-to-syngas conversion is tested through steam reforming (SR) and partial oxidation (POX) reactions. Here, conversion rates up to 74% and hydrogen selectivity of 60% are obtained by steam reforming at 650dC, while a specific volumetric hydrogen production of 4.5 mLH2 mL-1DME cm-3REACTOR at 600dC is obtained from DME POX in a standalone device tested by means of a 3D printed ceramic housing.

Published
2021

3. A Pd/Al2O3-based micro-reformer unit fully integrated in silicon technology for H-rich gas production

Author

Bianchini, M, Alayo, N, Soler, L, Salleras, M, Fonseca, L, Llorca, J, and Tarancon, A

Subjects
Physics - Applied Physics, Condensed Matter - Materials Science
Abstract

This work reports the design, manufacturing and catalytic activity characterization of a micro-reformer for hydrogen-rich gas generation integrated in portable-solid oxide fuel cells (u-SOFCs). The reformer has been designed as a silicon micro monolithic substrate compatible with the mainstream microelectronics fabrication technologies ensuring a cost-effective high reproducibility and reliability. Design and geometry of the system have been optimized comparing with the previous design, consisting in an array of more than 7x103 vertical through-silicon micro channels perfectly aligned (50 {um diameter) and a 5 W integrated serpentine heater consisting of three stacked metallic layers (TiW, W and Au) for perfect adhesion and passivation. Traditional fuels for SOFCs, such as ethanol or methanol, have been replaced by dimethyl ether (DME) and the chosen catalyst for DME conversion consists of Pd nanoparticles grafted on an alumina active support. The micro-channels have been coated by atomic layer deposition (ALD) with amorphous Al2O3 and the influence of rapid thermal processing (RTP) on such film has been studied. A customized ceramic 3D-printed holder has been designed to measure the specific hydrogen production rates, DME conversion and selectivity profiles of such catalyst at different temperatures.

Published
2021
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10. Cubic-matrix splines and second-order matrix models

Author

Tung, M. M., Soler, L., Defez, E., and Hervas, A.

Subjects
Mathematics - Numerical Analysis, 41A15, 39B42
Abstract

We discuss the direct use of cubic-matrix splines to obtain continuous approximations to the unique solution of matrix models of the type $Y''(x) = f(x,Y(x))$. For numerical illustration, an estimation of the approximation error, an algorithm for its implementation, and an example are given., Comment: 5 pages

Published
2007

11. Numerical Solutions of Matrix Differential Models using Cubic Matrix Splines II

Author

Defez, E., Hervas, A., Soler, L., and Tung, M. M.

Subjects
Mathematics - Numerical Analysis
Abstract

This paper presents the non-linear generalization of a previous work on matrix differential models. It focusses on the construction of approximate solutions of first-order matrix differential equations Y'(x)=f(x,Y(x)) using matrix-cubic splines. An estimation of the approximation error, an algorithm for its implementation and illustrative examples for Sylvester and Riccati matrix differential equations are given., Comment: 14 pages; submitted to Math. Comp. Modelling

Published
2006
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16. The Liver Tumor Segmentation Benchmark (LiTS).

Author

Bilic, P., Christ, P., Li, H.B., Vorontsov, E., Ben-Cohen, A., Kaissis, G., Szeskin, A., Jacobs, C., Mamani, G.E.H., Chartrand, G., Lohöfer, F., Holch, J.W., Sommer, W., Hofmann, F., Hostettler, A., Lev-Cohain, N., Drozdzal, M., Amitai, M.M., Vivanti, R., Sosna, J., Ezhov, I., Sekuboyina, A., Navarro, F., Kofler, F., Paetzold, J.C., Shit, S., Hu, Xiaobin, Lipková, J., Rempfler, M., Piraud, M., Kirschke, J., Wiestler, B., Zhang, Zhiheng, Hülsemeyer, C., Beetz, M., Ettlinger, F., Antonelli, M., Bae, W., Bellver, M., Bi, L., Chen, H., Chlebus, G., Dam, E.B., Dou, Qi, Fu, C.W., Georgescu, B., Giró-I-Nieto, X., Gruen, F., Han, X., Heng, P.A., Hesser, J., Moltz, J.H., Igel, C., Isensee, F., Jäger, P., Jia, F., Kaluva, K.C., Khened, M., Kim, I., Kim, J.H., Kim, S., Kohl, S., Konopczynski, T., Kori, A., Krishnamurthi, G., Li, F., Li, Hongchao, Li, J, Li, Xiaomeng, Lowengrub, J., Ma, J, Maier-Hein, K., Maninis, K.K., Meine, H., Merhof, D., Pai, A., Perslev, M., Petersen, J., Pont-Tuset, J., Qi, J., Qi, X., Rippel, O., Roth, K., Sarasua, I., Schenk, A., Shen, Z., Torres, J., Wachinger, C., Wang, Chunliang, Weninger, L., Wu, J., Xu, D., Yang, Xiaoping, Yu, SImon Chun-Ho, Yuan, Y., Yue, M., Zhang, L., Cardoso, J., Bakas, S., Braren, R., Heinemann, V., Pal, C., Tang, A., Kadoury, S., Soler, L., Ginneken, B. van, Greenspan, H., Joskowicz, L., Menze, B., Bilic, P., Christ, P., Li, H.B., Vorontsov, E., Ben-Cohen, A., Kaissis, G., Szeskin, A., Jacobs, C., Mamani, G.E.H., Chartrand, G., Lohöfer, F., Holch, J.W., Sommer, W., Hofmann, F., Hostettler, A., Lev-Cohain, N., Drozdzal, M., Amitai, M.M., Vivanti, R., Sosna, J., Ezhov, I., Sekuboyina, A., Navarro, F., Kofler, F., Paetzold, J.C., Shit, S., Hu, Xiaobin, Lipková, J., Rempfler, M., Piraud, M., Kirschke, J., Wiestler, B., Zhang, Zhiheng, Hülsemeyer, C., Beetz, M., Ettlinger, F., Antonelli, M., Bae, W., Bellver, M., Bi, L., Chen, H., Chlebus, G., Dam, E.B., Dou, Qi, Fu, C.W., Georgescu, B., Giró-I-Nieto, X., Gruen, F., Han, X., Heng, P.A., Hesser, J., Moltz, J.H., Igel, C., Isensee, F., Jäger, P., Jia, F., Kaluva, K.C., Khened, M., Kim, I., Kim, J.H., Kim, S., Kohl, S., Konopczynski, T., Kori, A., Krishnamurthi, G., Li, F., Li, Hongchao, Li, J, Li, Xiaomeng, Lowengrub, J., Ma, J, Maier-Hein, K., Maninis, K.K., Meine, H., Merhof, D., Pai, A., Perslev, M., Petersen, J., Pont-Tuset, J., Qi, J., Qi, X., Rippel, O., Roth, K., Sarasua, I., Schenk, A., Shen, Z., Torres, J., Wachinger, C., Wang, Chunliang, Weninger, L., Wu, J., Xu, D., Yang, Xiaoping, Yu, SImon Chun-Ho, Yuan, Y., Yue, M., Zhang, L., Cardoso, J., Bakas, S., Braren, R., Heinemann, V., Pal, C., Tang, A., Kadoury, S., Soler, L., Ginneken, B. van, Greenspan, H., Joskowicz, L., and Menze, B.

Abstract

01 februari 2023, Item does not contain fulltext, In this work, we report the set-up and results of the Liver Tumor Segmentation Benchmark (LiTS), which was organized in conjunction with the IEEE International Symposium on Biomedical Imaging (ISBI) 2017 and the International Conferences on Medical Image Computing and Computer-Assisted Intervention (MICCAI) 2017 and 2018. The image dataset is diverse and contains primary and secondary tumors with varied sizes and appearances with various lesion-to-background levels (hyper-/hypo-dense), created in collaboration with seven hospitals and research institutions. Seventy-five submitted liver and liver tumor segmentation algorithms were trained on a set of 131 computed tomography (CT) volumes and were tested on 70 unseen test images acquired from different patients. We found that not a single algorithm performed best for both liver and liver tumors in the three events. The best liver segmentation algorithm achieved a Dice score of 0.963, whereas, for tumor segmentation, the best algorithms achieved Dices scores of 0.674 (ISBI 2017), 0.702 (MICCAI 2017), and 0.739 (MICCAI 2018). Retrospectively, we performed additional analysis on liver tumor detection and revealed that not all top-performing segmentation algorithms worked well for tumor detection. The best liver tumor detection method achieved a lesion-wise recall of 0.458 (ISBI 2017), 0.515 (MICCAI 2017), and 0.554 (MICCAI 2018), indicating the need for further research. LiTS remains an active benchmark and resource for research, e.g., contributing the liver-related segmentation tasks in http://medicaldecathlon.com/. In addition, both data and online evaluation are accessible via https://competitions.codalab.org/competitions/17094.

Published
2023

17. Past River Channel Alignments Reconstruction by Combining a Meander Migration Model and Vegetation Succession

Author

Rivera-Soler, L. (author), Vargas-Luna, A. (author), Giraldo-Osorio, J. D. (author), Crosato, A. (author), Rivera-Soler, L. (author), Vargas-Luna, A. (author), Giraldo-Osorio, J. D. (author), and Crosato, A. (author)

Abstract

Meandering rivers dynamics has intrigued scientists since the nineteen fifties (Hooke, 2013). Meander migration models are regularly used to predict planimetric changes (Crosato, 2018), but they have not considered the figure, the reconstructed historical channel is shown. This alignment was obtained from the analysis of the existent water marks and channel trajectories that can be identified in satellite imagery. reconstruction of their historical alignments. This study deals with the reconstruction of a 9 km long reach of the Bodoquero River (see Figure 1), located in the Caquetá department, Colombia, combining the potential of meander migration models and vegetation succession to validate the modeled historical alignments., Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public., Environmental Fluid Mechanics

Published
2023

19. Fluorescence-Based Enhanced Reality for Colorectal Endoscopic Surgery

Author

Selka, F., Agnus, V., Nicolau, S., Bessaid, A., Soler, L., Marescaux, J., Diana, M., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Kobsa, Alfred, editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Weikum, Gerhard, editor, Ourselin, Sébastien, editor, and Modat, Marc, editor

Published
2014
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21. Simulation of Pneumoperitoneum for Laparoscopic Surgery Planning

Author

Bano, J., Hostettler, A., Nicolau, S. A., Cotin, S., Doignon, C., Wu, H. S., Huang, M. H., Soler, L., Marescaux, J., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Ayache, Nicholas, editor, Delingette, Hervé, editor, Golland, Polina, editor, and Mori, Kensaku, editor

Published
2012
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22. Simulation of the Abdominal Wall and Its Arteries after Pneumoperitoneum for Guidance of Port Positioning in Laparoscopic Surgery

Author

Bano, J., Hostettler, A., Nicolau, S. A., Doignon, C., Wu, H. S., Huang, M. H., Soler, L., Marescaux, J., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Bebis, George, editor, Boyle, Richard, editor, Parvin, Bahram, editor, Koracin, Darko, editor, Fowlkes, Charless, editor, Wang, Sen, editor, Choi, Min-Hyung, editor, Mantler, Stephan, editor, Schulze, Jürgen, editor, Acevedo, Daniel, editor, Mueller, Klaus, editor, and Papka, Michael, editor

Published
2012
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27. Cubic-Matrix Splines and Second-Order Matrix Models

Author

Tung, M. M., Soler, L., Defez, E., Hervás, A., Bock, Hans-Georg, editor, de Hoog, Frank, editor, Friedman, Avner, editor, Gupta, Arvind, editor, Neunzert, Helmut, editor, Pulleyblank, William R., editor, Rusten, Torgeir, editor, Santosa, Fadil, editor, Tornberg, Anna-Karin, editor, Capasso, Vincenzo, editor, Mattheij, Robert, editor, Scherzer, Otmar, editor, Bonilla, Luis L., editor, Moscoso, Miguel, editor, Platero, Gloria, editor, and Vega, Jose M., editor

Published
2008
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30. Clinical Evaluation of a Respiratory Gated Guidance System for Liver Punctures

Author

Nicolau, S. A., Pennec, X., Soler, L., Ayache, N., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Ayache, Nicholas, editor, Ourselin, Sébastien, editor, and Maeder, Anthony, editor

Published
2007
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31. An assessment of the potential health impacts of food reformulation

Author

Leroy, P., Requillart, V., Soler, L.-G., and Enderli, G.

Subjects
Methods, Health aspects, Health risk assessment -- Methods, Food safety -- Health aspects, Food -- Safety and security measures
Abstract

INTRODUCTION Policies focused on food quality are intended to facilitate healthy choices by consumers, even those who are not fully informed about the links between food consumption and health. Decreasing [...], BACKGROUND/OBJECTIVES: Policies focused on food quality are Intended to facilitate healthy choices by consumers, even those who are not fully informed about the links between food consumption and health. The goal of this paper is to evaluate the potential impact of such a food reformulation scenario on health outcomes. SUBJECTS/METHODS: We first created reformulation scenarios adapted to the French characteristics of foods. After computing the changes in the nutrient intakes of representative consumers, we determined the health effects of these changes. To do so, we used the DIETRON health assessment model, which calculates the number of deaths avoided by changes in food and nutrient intakes. RESULTS: Depending on the reformulation scenario, the total impact of reformulation varies between 2408 and 3597 avoided deaths per year, which amounts to a 3.7-5.5% reduction in mortality linked to diseases considered in the DIETRON model. The impacts are much higher for men than for women and much higher for low-income categories than for high-income categories. These differences result from the differences in consumption patterns and initial disease prevalence among the various income categories. CONCLUSIONS: Even without any changes in consumers' behaviors, realistic food reformulation may have significant health outcomes. European Journal of Clinical Nutrition (2016) 70, 694-699; doi:10.1038/ejcn.2015.201; published online 16 December 2015

Published
2016
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32. Real Time Simulation of Organ Motions Induced by Breathing: First Evaluation on Patient Data

Author

Hostettler, A., Nicolau, S. A., Forest, C., Soler, L., Remond, Y., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Harders, Matthias, editor, and Székely, Gábor, editor

Published
2006
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34. A Complete Augmented Reality Guidance System for Liver Punctures: First Clinical Evaluation

Author

Nicolau, S. A., Pennec, X., Soler, L., Ayache, N., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Duncan, James S., editor, and Gerig, Guido, editor

Published
2005
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38. An Augmented Reality & Virtuality Interface for a Puncture Guidance System: Design and Validation on an Abdominal Phantom

Author

Nicolau, S., Schmid, J., Pennec, X., Soler, L., Ayache, N., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Yang, Guang-Zhong, editor, and Jiang, Tian-Zi, editor

Published
2004
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