263 research outputs found
sj-docx-1-smo-10.1177_20503121231225874 – Supplemental material for Elexacaftor–tezacaftor–ivacaftor for cystic fibrosis with Phe508del mutation: Evidence from randomized controlled trials
No full textSupplemental material, sj-docx-1-smo-10.1177_20503121231225874 for Elexacaftor–tezacaftor–ivacaftor for cystic fibrosis with Phe508del mutation: Evidence from randomized controlled trials by Rong He, Fei Lin, Zehui Deng and Bin Yu in SAGE Open Medicine</p
Pretrained Weights for BA-Net of AMOS 2022 Challenge
No full textPretrained Weights for Boundary-Aware Network (BA-Net) of Multi-Modality Abdominal Multi-Organ Segmentation Challenge 2022 (AMOS 2022) Challenge.
If you find this useful for your research, please consider citing the paper as follows:
@misc{https://doi.org/10.48550/arxiv.2208.13774,
doi = {10.48550/ARXIV.2208.13774},
url = {https://arxiv.org/abs/2208.13774},
author = {Hu, Shishuai and Liao, Zehui and Xia, Yong},
title = {Boundary-Aware Network for Abdominal Multi-Organ Segmentation},
publisher = {arXiv},
year = {2022},
UniUSNet: A Promptable Framework for Universal Ultrasound Disease Prediction and Tissue Segmentation
No full textUltrasound is widely used in clinical practice due to its affordability, portability, and safety. However, current AI research often overlooks combined disease prediction and tissue segmentation. We propose UniUSNet, a universal framework for ultrasound image classification and segmentation. This model handles various ultrasound types, anatomical positions, and input formats, excelling in both segmentation and classification tasks. Trained on a comprehensive dataset with over 9.7K annotations from 7 distinct anatomical positions, our model matches state-of-the-art performance and surpasses single-dataset and ablated models. Zero-shot and fine-tuning experiments show strong generalization and adaptability with minimal fine-tuning. We plan to expand our dataset and refine the prompting mechanism, with model weights and code available at (https://github.com/Zehui-Lin/UniUSNet).Accepted to BIBM 202
Impact of laboratory simulated aging on asphalt concrete flexibility
No full textThe aging of asphalt materials is considered an important factor contributing to the deterioration of asphalt concrete (AC) pavements. Asphalt binder aging is a combination of various complex mechanisms that affect its rheological properties causing AC to become stiffer and more brittle. As a result of aging, the resistance of AC pavements to various forms of cracking including fatigue, thermal, and/or block is reduced. Hence, AC aging presents challenges for preserving an adequate level of pavement serviceability. Therefore, it is critical to understand the effect of aging on AC pavement cracking development and identify the effect of AC mix design parameters on the aging rate. A wide range of AC mixes were investigated in this study using the Illinois Flexibility Index Test (I-FIT) after the specimens were subjected to various lab-simulated long-term aging conditions. The flexibility index (FI), an outcome of the I-FIT and a measure of the AC flexibility. decreases consistently after long-term aging. This effect is primarily due to changes in the post-peak slope, an indication of crack propagation speed. The impact of aging on various AC mixtures varies and results in different FI deductions because of the mix type and aging condition.
Simple and multiple linear regression were used to analyze the impact of mix design parameters on AC aging rate. The effect of voids in mineral aggregate (VMA), low-temperature performance-grade (PG), asphalt binder replacement (ABR), AC mix type, water absorption of the aggregate blend, and effective asphalt binder content was found to be significant. Several aging levels were examined using a conventional oven and utilizing both compacted and loose AC mixes. The various aging levels were compared to the standard five-day aging at 85oC (5D/85C). The study found that aging compacted I-FIT specimens at 3D/95C is practical and is equivalent to that at 5D/85. Additionally, because the parameters impacting aging at 1D/95C and 3D/95C are the same and have the same trend, 1D/95C may be used as an initial indicator for long-term aging.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2020-12-01The student, Zehui Zhu, accepted the attached license on 2018-12-04 at 15:58.The student, Zehui Zhu, submitted this Thesis for approval on 2018-12-04 at 16:10.This Thesis was approved for publication on 2018-12-05 at 08:42.DSpace SAF Submission Ingestion Package generated from Vireo submission #13205 on 2019-02-08 at 11:41:17Made available in DSpace on 2019-02-08T18:44:38Z (GMT). No. of bitstreams: 2
ZHU-THESIS-2018.pdf: 5043178 bytes, checksum: d2c5cb0ae045e7a833b346962ecd65be (MD5)
LICENSE.txt: 4206 bytes, checksum: 5333ae652bfc9c947cb4977b9b6a955e (MD5)
Previous issue date: 2018-12-05Embargo set by: Seth Robbins for item 109967
Lift date: 2021-02-08T18:44:50Z
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Mousses magnétorhéologiques dures : expériences, modélisation et applications en détection haptique
No full textHard magnetorheological elastomers (h-MREs) in general are two-phase composite materials consisting of hard magnetic particles that are embedded in an otherwise soft elastomer matrix. In turn, this work proposes a family of novel mechanically-soft and magnetically-hard magnetorheological foams that, upon deformation, lead to robust and measurable magnetic flux changes in their surroundings. This allows to infer qualitatively and even quantitatively the imposed deformation and, eventually from that, an estimation of the stiffness and average stress on the sample even in complex loading scenarios involving combinations of uniform or nonuniform compression/tension with superposed shearing in different directions.At first, we analyze experimentally, numerically and theoretically the purely magnetic response of h-MRE foams with variable particle and porositycontent. The fabrication and experimental measurement of the remanent magnetic flux of h-MRE foams are discussed in detail. We find that at lower particle content, the foam comprises closed-cell porosity, with the voids having a variable size and ellipsoidal shape. As the particle content in the matrix increases, the voids become smaller in size and more spherical in shape, while the porosity decreases. We show experimentally that theremanent magnetic flux is entirely independent of the shape and orientation of the voids. Image-based morphological analysis of the h-MRE foam microstructure subsequently allows to reconstruct numerically unit-cells that share the same statistics as those of the experimental foams. These unit-cells are used to construct an explicit theoretical model with magnetic dissipation. We show that the remanent magnetization is a linear functionof the overall particle volume fraction in the foam. The model is further used to scale up the analysis and solve the experimental boundary value problem of a permanently magnetized h-MRE cube, and the numerical estimates show excellent agreement with the experiments. The numerical model is shown to match available analytical solutions for the remanent magnetic flux of parallelepiped magnets.Subsequently, the magneto-mechanical response of isotropic h-MRE foams is explored through a novel and complete theoretical, numerical and experimental framework. The fabrication process of h-MRE foams is slightly modified to obtain both isotropic mechanical and magnetic responses, with the resulting voids having rather polygonal and spherical shapes. This, in turn, allows to simplify substantially the rather complex compressible magneto-mechanical response of these materials. In particular, we provide a combined experimental protocol coupled with analytical solution of the boundary value problem corresponding to the experimental setup and a fully explicit homogenization-based model with only a very small number of material parameters requiring calibration. After calibration and numerical implementation, the proposed model is assessed with the experimental results obtained under different particle volume fractions and compression types, showing sufficient accuracy without requiring recalibration. Furthermore, we show that these permanently magnetized foams provide versatile sensing capabilities without the need for an externally-applied magnetic field by taking advantage of the pore closure/opening and the resulting effective change in apparent magnetization saturation, but also of the specimen shape changes involved in such large deformation processes.The complete experimental, theoretical and numerical framework on finite strain and compressible magneto-elasticity for h-MRE foams presented in this work allows to measure and predict coupled magneto-mechanical properties of such materials with different particle volume fractions. Thus, this framework provides an efficient tool to predict material behavior and design sensing devices by h-MRE foams.Les élastomères magnétorhéologiques durs (h-MREs) sont des matériaux composites constitués de particules magnétiques dures dispersées dans une matrice élastomère souple. Ce travail propose une nouvelle famille de mousses h-MRE à la fois mécaniquement souples et magnétiquement dures. Lorsqu’elles sont déformées, ces mousses induisent des variations mesurables du flux magnétique dans leur environnement, permettant d’estimer qualitativement, voire quantitativement, la déformation imposée ainsi que la rigidité et la contrainte moyenne, y compris sous des chargements complexes combinant compression, traction et cisaillement.Dans un premier temps, nous étudions la réponse purement magnétique de ces mousses, en faisant varier la teneur en particules et la porosité. Le processus de fabrication et la mesure expérimentale du flux magnétique rémanent sont présentés en détail. Nous observons qu’à faible teneur en particules, la mousse présente une porosité à cellules fermées avec des vides ellipsoïdaux de tailles variables. En augmentant la concentration de particules, les vides deviennent plus petits, plus sphériques et la porosité globale diminue. De manière remarquable, les mesures montrent que le flux magnétique rémanent est indépendant de la forme et de l’orientation des vides. Une analyse morphologique basée sur imagerie permet de reconstruire numériquement des cellules représentatives partageant les mêmes statistiques que les mousses expérimentales. Ces cellules sont ensuite utilisées dans un modèle théorique explicite intégrant la dissipation magnétique. Il est démontré que l’aimantation rémanente croît linéairement avec la fraction volumique de particules. Le modèle permet aussi de prédire la réponse magnétique d’un cube h-MRE aimanté en accord excellent avec les mesures expérimentales. Il concorde également avec les solutions analytiques disponibles pour le flux rémanent dans des aimants de forme parallélépipédique.Ensuite, la réponse magnéto-mécanique de mousses h-MRE isotropes est étudiée à l’aide d’un cadre théorique, numérique et expérimental complet. Le procédé de fabrication est ajusté afin de produire des réponses mécaniques et magnétiques isotropes, avec des vides de formes polygonales ou sphériques. Cette isotropie permet de simplifier la modélisation de la réponse magnéto-mécanique compressible. Un protocole expérimental est mis en place, associé à une solution analytique du problème aux limites correspondant, ainsi qu’à un modèle d’homogénéisation explicite avec très peu de paramètres à calibrer. Une fois calibré, le modèle prédit précisément les résultats expérimentaux obtenus pour différentes fractions de particules et divers types de compression, sans nécessiter de recalibration. De plus, ces mousses aimantées en permanence offrent une capacité de détection sans champ magnétique externe, exploitant l’ouverture/fermeture des pores et les changements de forme associés aux grandes déformations pour modifier l’aimantation apparente.L’ensemble du cadre expérimental, théorique et numérique développé dans ce travail permet ainsi de mesurer et prédire efficacement les propriétés magnéto-mécaniques couplées des mousses h-MRE, en fonction de leur microstructure. Ce cadre constitue un outil performant pour la conception de capteurs souples intégrant des matériaux intelligents
Mousses magnétorhéologiques dures : expériences, modélisation et applications en détection haptique
No full textHard magnetorheological elastomers (h-MREs) in general are two-phase composite materials consisting of hard magnetic particles that are embedded in an otherwise soft elastomer matrix. In turn, this work proposes a family of novel mechanically-soft and magnetically-hard magnetorheological foams that, upon deformation, lead to robust and measurable magnetic flux changes in their surroundings. This allows to infer qualitatively and even quantitatively the imposed deformation and, eventually from that, an estimation of the stiffness and average stress on the sample even in complex loading scenarios involving combinations of uniform or nonuniform compression/tension with superposed shearing in different directions.At first, we analyze experimentally, numerically and theoretically the purely magnetic response of h-MRE foams with variable particle and porositycontent. The fabrication and experimental measurement of the remanent magnetic flux of h-MRE foams are discussed in detail. We find that at lower particle content, the foam comprises closed-cell porosity, with the voids having a variable size and ellipsoidal shape. As the particle content in the matrix increases, the voids become smaller in size and more spherical in shape, while the porosity decreases. We show experimentally that theremanent magnetic flux is entirely independent of the shape and orientation of the voids. Image-based morphological analysis of the h-MRE foam microstructure subsequently allows to reconstruct numerically unit-cells that share the same statistics as those of the experimental foams. These unit-cells are used to construct an explicit theoretical model with magnetic dissipation. We show that the remanent magnetization is a linear functionof the overall particle volume fraction in the foam. The model is further used to scale up the analysis and solve the experimental boundary value problem of a permanently magnetized h-MRE cube, and the numerical estimates show excellent agreement with the experiments. The numerical model is shown to match available analytical solutions for the remanent magnetic flux of parallelepiped magnets.Subsequently, the magneto-mechanical response of isotropic h-MRE foams is explored through a novel and complete theoretical, numerical and experimental framework. The fabrication process of h-MRE foams is slightly modified to obtain both isotropic mechanical and magnetic responses, with the resulting voids having rather polygonal and spherical shapes. This, in turn, allows to simplify substantially the rather complex compressible magneto-mechanical response of these materials. In particular, we provide a combined experimental protocol coupled with analytical solution of the boundary value problem corresponding to the experimental setup and a fully explicit homogenization-based model with only a very small number of material parameters requiring calibration. After calibration and numerical implementation, the proposed model is assessed with the experimental results obtained under different particle volume fractions and compression types, showing sufficient accuracy without requiring recalibration. Furthermore, we show that these permanently magnetized foams provide versatile sensing capabilities without the need for an externally-applied magnetic field by taking advantage of the pore closure/opening and the resulting effective change in apparent magnetization saturation, but also of the specimen shape changes involved in such large deformation processes.The complete experimental, theoretical and numerical framework on finite strain and compressible magneto-elasticity for h-MRE foams presented in this work allows to measure and predict coupled magneto-mechanical properties of such materials with different particle volume fractions. Thus, this framework provides an efficient tool to predict material behavior and design sensing devices by h-MRE foams.Les élastomères magnétorhéologiques durs (h-MREs) sont des matériaux composites constitués de particules magnétiques dures dispersées dans une matrice élastomère souple. Ce travail propose une nouvelle famille de mousses h-MRE à la fois mécaniquement souples et magnétiquement dures. Lorsqu’elles sont déformées, ces mousses induisent des variations mesurables du flux magnétique dans leur environnement, permettant d’estimer qualitativement, voire quantitativement, la déformation imposée ainsi que la rigidité et la contrainte moyenne, y compris sous des chargements complexes combinant compression, traction et cisaillement.Dans un premier temps, nous étudions la réponse purement magnétique de ces mousses, en faisant varier la teneur en particules et la porosité. Le processus de fabrication et la mesure expérimentale du flux magnétique rémanent sont présentés en détail. Nous observons qu’à faible teneur en particules, la mousse présente une porosité à cellules fermées avec des vides ellipsoïdaux de tailles variables. En augmentant la concentration de particules, les vides deviennent plus petits, plus sphériques et la porosité globale diminue. De manière remarquable, les mesures montrent que le flux magnétique rémanent est indépendant de la forme et de l’orientation des vides. Une analyse morphologique basée sur imagerie permet de reconstruire numériquement des cellules représentatives partageant les mêmes statistiques que les mousses expérimentales. Ces cellules sont ensuite utilisées dans un modèle théorique explicite intégrant la dissipation magnétique. Il est démontré que l’aimantation rémanente croît linéairement avec la fraction volumique de particules. Le modèle permet aussi de prédire la réponse magnétique d’un cube h-MRE aimanté en accord excellent avec les mesures expérimentales. Il concorde également avec les solutions analytiques disponibles pour le flux rémanent dans des aimants de forme parallélépipédique.Ensuite, la réponse magnéto-mécanique de mousses h-MRE isotropes est étudiée à l’aide d’un cadre théorique, numérique et expérimental complet. Le procédé de fabrication est ajusté afin de produire des réponses mécaniques et magnétiques isotropes, avec des vides de formes polygonales ou sphériques. Cette isotropie permet de simplifier la modélisation de la réponse magnéto-mécanique compressible. Un protocole expérimental est mis en place, associé à une solution analytique du problème aux limites correspondant, ainsi qu’à un modèle d’homogénéisation explicite avec très peu de paramètres à calibrer. Une fois calibré, le modèle prédit précisément les résultats expérimentaux obtenus pour différentes fractions de particules et divers types de compression, sans nécessiter de recalibration. De plus, ces mousses aimantées en permanence offrent une capacité de détection sans champ magnétique externe, exploitant l’ouverture/fermeture des pores et les changements de forme associés aux grandes déformations pour modifier l’aimantation apparente.L’ensemble du cadre expérimental, théorique et numérique développé dans ce travail permet ainsi de mesurer et prédire efficacement les propriétés magnéto-mécaniques couplées des mousses h-MRE, en fonction de leur microstructure. Ce cadre constitue un outil performant pour la conception de capteurs souples intégrant des matériaux intelligents
Mousses magnétorhéologiques dures : expériences, modélisation et applications en détection haptique
No full textHard magnetorheological elastomers (h-MREs) in general are two-phase composite materials consisting of hard magnetic particles that are embedded in an otherwise soft elastomer matrix. In turn, this work proposes a family of novel mechanically-soft and magnetically-hard magnetorheological foams that, upon deformation, lead to robust and measurable magnetic flux changes in their surroundings. This allows to infer qualitatively and even quantitatively the imposed deformation and, eventually from that, an estimation of the stiffness and average stress on the sample even in complex loading scenarios involving combinations of uniform or nonuniform compression/tension with superposed shearing in different directions.At first, we analyze experimentally, numerically and theoretically the purely magnetic response of h-MRE foams with variable particle and porositycontent. The fabrication and experimental measurement of the remanent magnetic flux of h-MRE foams are discussed in detail. We find that at lower particle content, the foam comprises closed-cell porosity, with the voids having a variable size and ellipsoidal shape. As the particle content in the matrix increases, the voids become smaller in size and more spherical in shape, while the porosity decreases. We show experimentally that theremanent magnetic flux is entirely independent of the shape and orientation of the voids. Image-based morphological analysis of the h-MRE foam microstructure subsequently allows to reconstruct numerically unit-cells that share the same statistics as those of the experimental foams. These unit-cells are used to construct an explicit theoretical model with magnetic dissipation. We show that the remanent magnetization is a linear functionof the overall particle volume fraction in the foam. The model is further used to scale up the analysis and solve the experimental boundary value problem of a permanently magnetized h-MRE cube, and the numerical estimates show excellent agreement with the experiments. The numerical model is shown to match available analytical solutions for the remanent magnetic flux of parallelepiped magnets.Subsequently, the magneto-mechanical response of isotropic h-MRE foams is explored through a novel and complete theoretical, numerical and experimental framework. The fabrication process of h-MRE foams is slightly modified to obtain both isotropic mechanical and magnetic responses, with the resulting voids having rather polygonal and spherical shapes. This, in turn, allows to simplify substantially the rather complex compressible magneto-mechanical response of these materials. In particular, we provide a combined experimental protocol coupled with analytical solution of the boundary value problem corresponding to the experimental setup and a fully explicit homogenization-based model with only a very small number of material parameters requiring calibration. After calibration and numerical implementation, the proposed model is assessed with the experimental results obtained under different particle volume fractions and compression types, showing sufficient accuracy without requiring recalibration. Furthermore, we show that these permanently magnetized foams provide versatile sensing capabilities without the need for an externally-applied magnetic field by taking advantage of the pore closure/opening and the resulting effective change in apparent magnetization saturation, but also of the specimen shape changes involved in such large deformation processes.The complete experimental, theoretical and numerical framework on finite strain and compressible magneto-elasticity for h-MRE foams presented in this work allows to measure and predict coupled magneto-mechanical properties of such materials with different particle volume fractions. Thus, this framework provides an efficient tool to predict material behavior and design sensing devices by h-MRE foams.Les élastomères magnétorhéologiques durs (h-MREs) sont des matériaux composites constitués de particules magnétiques dures dispersées dans une matrice élastomère souple. Ce travail propose une nouvelle famille de mousses h-MRE à la fois mécaniquement souples et magnétiquement dures. Lorsqu’elles sont déformées, ces mousses induisent des variations mesurables du flux magnétique dans leur environnement, permettant d’estimer qualitativement, voire quantitativement, la déformation imposée ainsi que la rigidité et la contrainte moyenne, y compris sous des chargements complexes combinant compression, traction et cisaillement.Dans un premier temps, nous étudions la réponse purement magnétique de ces mousses, en faisant varier la teneur en particules et la porosité. Le processus de fabrication et la mesure expérimentale du flux magnétique rémanent sont présentés en détail. Nous observons qu’à faible teneur en particules, la mousse présente une porosité à cellules fermées avec des vides ellipsoïdaux de tailles variables. En augmentant la concentration de particules, les vides deviennent plus petits, plus sphériques et la porosité globale diminue. De manière remarquable, les mesures montrent que le flux magnétique rémanent est indépendant de la forme et de l’orientation des vides. Une analyse morphologique basée sur imagerie permet de reconstruire numériquement des cellules représentatives partageant les mêmes statistiques que les mousses expérimentales. Ces cellules sont ensuite utilisées dans un modèle théorique explicite intégrant la dissipation magnétique. Il est démontré que l’aimantation rémanente croît linéairement avec la fraction volumique de particules. Le modèle permet aussi de prédire la réponse magnétique d’un cube h-MRE aimanté en accord excellent avec les mesures expérimentales. Il concorde également avec les solutions analytiques disponibles pour le flux rémanent dans des aimants de forme parallélépipédique.Ensuite, la réponse magnéto-mécanique de mousses h-MRE isotropes est étudiée à l’aide d’un cadre théorique, numérique et expérimental complet. Le procédé de fabrication est ajusté afin de produire des réponses mécaniques et magnétiques isotropes, avec des vides de formes polygonales ou sphériques. Cette isotropie permet de simplifier la modélisation de la réponse magnéto-mécanique compressible. Un protocole expérimental est mis en place, associé à une solution analytique du problème aux limites correspondant, ainsi qu’à un modèle d’homogénéisation explicite avec très peu de paramètres à calibrer. Une fois calibré, le modèle prédit précisément les résultats expérimentaux obtenus pour différentes fractions de particules et divers types de compression, sans nécessiter de recalibration. De plus, ces mousses aimantées en permanence offrent une capacité de détection sans champ magnétique externe, exploitant l’ouverture/fermeture des pores et les changements de forme associés aux grandes déformations pour modifier l’aimantation apparente.L’ensemble du cadre expérimental, théorique et numérique développé dans ce travail permet ainsi de mesurer et prédire efficacement les propriétés magnéto-mécaniques couplées des mousses h-MRE, en fonction de leur microstructure. Ce cadre constitue un outil performant pour la conception de capteurs souples intégrant des matériaux intelligents
FORUM-Creating Centrality for Alamar by Promoting Self-Employment
No full textThe research area-Alamar, a satellite city to the east of Havana, Cuba, is investigated in social, economic and social scopes, as well as spatial character. A large-scale interventions is proposed—“FORUM”, operating at the scale of community infrastructure, providing a pilot building and a new spatial order for urban center where learning and self-employing as the central organizer of community life. The “FORUM” contains spaces for living, learning and working appropriate to the lives of self-employers in Alamar. More than a means for gentrification, my proposal is to expand the model of self-employment as social and economic propulsion to Alamar people who are often excluded from the contemporary labor market in Cuba.The ambition of the project is to build the link between Alamar and Cuba as well as the link between present and future. Centrality is the goal to be achieved in Alamar with the content of self-employment.Complex projectsArchitecture, Urbanism and Building Sciences | Complex Project
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