Article
Chemistry, Applied
Zhen Shen, Zhaoping Meng, Yu Liu, Junhuan Lei, Weijun Shen, Huaxin Ren, Tengwei Gao, Kun Zhang, Yuheng Wang, Libo Tan
Summary: This study combined CO2/N2 adsorption and synchrotron radiation Nano-CT experiments to reveal the characteristics of multi-scale nanopore structures during coalification. The research found that ultra-micropores were dominant, while micropores, mesopores, and macropores were less developed. With increasing coal maturity, the total permeability gradually decreased, mainly provided by macropores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Andreia Silveira, Nikolay Kardjilov, Henning Markoetter, Elena Longo, Imke Greving, Peter Lasch, Ron Shahar, Paul Zaslansky
Summary: This study compared the diffusion of water in bone materials and found that anosteocytic bone material is more amenable to water diffusion, while osteocytic bone material retains more water. These findings reveal functional differences between the two bone materials.
MATERIALS & DESIGN
(2022)
Article
Engineering, Biomedical
Elisa Fiume, Alessandro Schiavi, Gissur Orlygsson, Cristina Bignardi, Enrica Verne, Francesco Baino
Summary: Proper microstructural and transport properties are crucial for scaffold design in tissue engineering applications. Evaluating permeability remains a challenge, while pore characteristics are relatively easier to assess.
ACTA BIOMATERIALIA
(2021)
Article
Chemistry, Physical
Kyu Min Lee, Maedeh Pahlevaninezhad, Victoria Smith, Sara Abouali, Francesco P. Orfino, Erik Kjeang, Michael A. Pope, Edward P. L. Roberts, Jeff T. Gostick
Summary: Flow battery electrodes made of compressed electrospun carbon fibers with laser perforations for improved performance were synthesized. The compressed fibers resulted in a reduced porosity and increased volumetric surface area without significantly affecting the in-plane permeability and tortuosity. Flow battery performance tests showed that the compressed samples, with or without laser perforations, outperformed commercial carbon mats, with the perforated samples exhibiting the best performance over the entire current density range.
MATERIALS TODAY ENERGY
(2023)
Article
Mechanics
Hu Liu, Guannan Liu, Xutong Zhang, Jiayi Gu, Jingyun Zhu
Summary: After hydraulic fracturing, shale gas is transported to horizontal wells through various media. The study developed a shale multi-scale mining model, considering power-law fracture distribution, porous media fractal theory, and seepage mechanisms in both water and gas phases. The results demonstrated the importance of the degree of hydraulic fracturing, properties of the water phase, and hydraulic fracturing porosity in improving gas production and pore structure evolution.
Article
Chemistry, Multidisciplinary
Zhigao Peng, Zongwei Deng, Haoxiong Feng, Shenggui Liu, Yingjun Li
Summary: This paper investigated the impact of methane desorption and diffusion on coalbed methane productivity. The results show that factors such as hydraulic fracturing can increase coal's specific surface area and fracture proportion, affecting gas desorption and diffusion efficiency. Additionally, the flow and diffusion of methane are closely related, with the accuracy of results depending on adsorption and desorption rate constants.
Article
Materials Science, Multidisciplinary
M. R. Hassan, Md. Sarowar Hossain, M. A. Hakim, M. A. Matin, M. N. I. Khan, S. S. Sikder
Summary: The study explored the enhancement of magnetic and electric properties in BiFe0.9La0.1O3 with the addition of Ni-Zn ferrite. The addition of Ni-Zn ferrite led to an increase in saturation magnetization, decrease in permittivity and dielectric loss. The composites with Ni-Zn ferrite addition may have potential applications in devices like microwave antennas.
RESULTS IN PHYSICS
(2021)
Article
Energy & Fuels
Mohamed Garum, Paul W. J. Glover, Piroska Lorinczi, Stuart Micklethwaite, Ali Hassanpour
Summary: Quantification of shale microstructures across a wide range of scales is challenging due to the complexity of the material. This study employed various techniques such as nano-CT, MIP, and nitrogen adsorption to analyze the microstructure of a gas shale sample, revealing differences in porosity and kerogen fraction measurements. The results suggest high shale gas potential based on pore size distribution, aspect ratio, and permeability assessments.
Article
Energy & Fuels
Umar Manzoor, Muhsan Ehsan, Muyyassar Hussain, Muhammad Khizer Iftikhar, Kamal Abdelrahman, S. M. Talha Qadri, Farooq Arshad, Komal Ashraf, Mohammed S. S. Fnais
Summary: Petrophysical analysis is a crucial practice for reservoir evaluation, but conventional interpretation faces limitations due to reservoir complexity and uncertainties. Therefore, a delicate machine-learning approach has been applied to analyze potential and interpret well log data effectively. This comprehensive study evaluates different algorithms and demonstrates the efficacy of ML-based petrophysics in providing reliable and optimized quality logs.
Review
Materials Science, Multidisciplinary
Dhanalakshmi Jeyachandran, Marta Cerruti
Summary: Porosity plays a significant role in the performance of scaffolds for bone tissue engineering. Different pore sizes, such as macropores, micropores, and even nanopores, have distinct effects on cellular infiltration, adhesion, nutrient absorption, and cell-material interactions. This review discusses fabrication techniques, pore nomenclature, and the influence of scaffold porosity on mechanical properties and biological activity. It also explores future advancements in this field, including the use of computational modeling and artificial intelligence.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Energy & Fuels
Peng Xu, Jin Meng, Jialiang Wang, Boming Yu, Shuxia Qiu
Summary: A novel pore-scale physical model for effective thermal conductivity (ETC) of multiscale unsaturated porous media is developed, which shows acceptable agreement with experimental results. It is found that increasing tortuosity leads to higher thermal resistance and reduced ETC, while rough surfaces and Knudsen effect enhance and reduce ETC, respectively.
Article
Chemistry, Multidisciplinary
Lin Yang, Zhengyuan Lu, Xie Tang, Ling Tang, Weiwei Zhang
Summary: The Upper Paleozoic strata in the Ordos Basin are characterized by tight sandstone gas reservoirs with strong heterogeneity and widely distributed aquifers. Traditional mud logging technology faces difficulties in effectively identifying the reservoir and fluid properties. By integrating NMR logging, regional geological characteristics, and gas test results, the reservoirs were classified to effectively identify the reservoir and fluid properties.
Article
Engineering, Biomedical
Elizabeth Gacek, Ryan R. Mahutga, Victor H. Barocas
Summary: This study develops a discrete-continuum modeling scheme for analyzing tissue growth and remodeling, combining microstructural and cellular-scale models with macroscopic finite element models. The model is applied in case studies of arterial media, media and adventitia, and chronic dissection of an arterial wall, providing new data and insights into growth and remodeling processes.
ACTA BIOMATERIALIA
(2023)
Article
Cardiac & Cardiovascular Systems
Ana Rubina Perestrelo, Ana Catarina Silva, Jorge Oliver-De La Cruz, Fabiana Martino, Vladimir Horvath, Guido Caluori, Ondrej Polansky, Vladimir Vinarsky, Giulia Azzato, Giuseppe de Marco, Vita Zampachova, Petr Skladal, Stefania Pagliari, Alberto Rainer, Perpetua Pinto-do-O, Alessio Caravella, Kamila Koci, Diana S. Nascimento, Giancarlo Forte
Summary: The study reveals that the remodeling of cardiac extracellular matrix (ECM) during heart failure (HF) leads to cardiac fibroblast activation and focal adhesion protein expression through hyperactivated YAP signaling, impacting cell homing.
CIRCULATION RESEARCH
(2021)
Article
Materials Science, Ceramics
Chunsheng Zhou, Xiaoyu Zhang, Zhendi Wang, Zhenli Yang
Summary: Cement-based materials are widely used in modern civilization, but there are long-standing controversies surrounding their fundamental water-related properties. The concept of water sensitivity in cement-based materials helps explain unexplained behaviors and validates its application in theoretical research and technological development.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Multidisciplinary Sciences
Rafael Guerreiro, Tiago Pires, Jose M. Guedes, Paulo R. Fernandes, Andre P. G. Castro
Editorial Material
Chemistry, Physical
A. P. G. Castro, T. Pires, J. E. Santos, B. P. Gouveia, P. R. Fernandes
Article
Engineering, Biomedical
Jorge Santos, Tiago Pires, Barbara P. Gouveia, Andre P. G. Castro, Paulo R. Fernandes
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Andre P. G. Castro, Jorge Santos, Tiago Pires, Paulo R. Fernandes
MACROMOLECULAR MATERIALS AND ENGINEERING
(2020)
Article
Engineering, Biomedical
Filipe Pagaimo, Paulo R. Fernandes, Jose Xavier, Oscar L. Alves
Summary: This study introduces an algorithm for identifying an imbalanced spine through center of rotation calculation and a new parameter called distance to the ellipse. The algorithm allows for pre-op and post-op outcome comparison and the rapid identification of cases needing more attention. It has the potential to become a new methodology in clinical practice.
CLINICAL BIOMECHANICS
(2021)
Article
Biophysics
Tiago Pires, Jorge Santos, Rui B. Ruben, Barbara P. Gouveia, Andre P. G. Castro, Paulo R. Fernandes
Summary: Experimental and computational analysis were used to assess the permeability and fluid streamlines within different scaffold geometries, with Gyroid structures being most suitable for bone tissue engineering applications, while Schwarz P structures were found to provide a poor environment for cell seeding and proliferation.
JOURNAL OF BIOMECHANICS
(2021)
Article
Multidisciplinary Sciences
M. T. Cardoso, B. Feijoo, A. P. G. Castro, E. J. Ribeiro, P. R. Fernandes
Summary: Cataract is a disease that leads to blurred vision and blindness, with an increasing number of treatments due to an aging population. While post-operative complications are decreasing, bag-IOL dislocation remains a serious issue.
Article
Computer Science, Interdisciplinary Applications
Pedro G. Coelho, Bruno C. Barroca, Fabio M. Conde, Jose M. Guedes
Summary: Strength-oriented optimization of porous periodic microstructures has a significant impact on the design of load-bearing lightweight structures to avoid mechanical failure. The study shows that minimizing the peak von-Mises stress through shape or topology design changes can effectively reduce stresses in different load scenarios, demonstrating the importance of material design freedom in achieving lower peak stresses.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Engineering, Biomedical
M. I. Godinho, V. Carvalho, M. T. Matos, P. R. Fernandes, A. P. G. Castro
Summary: The facet capsular ligament and anterior longitudinal ligament play crucial roles in spinal stability, with bilateral fixation being the most effective in reducing the risk of adjacent disc degeneration. However, right unilateral fixation is more suitable for reducing disc stress.
CLINICAL BIOMECHANICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Pieter-Jan Terryn, Paulo R. Fernandes, Filipa Joao, Antonio Veloso, Fatima Baptista
Summary: Physical activity has a significant impact on bone density, especially weight-bearing activities performed during childhood. The study shows that higher intensity and shorter duration physical activity can significantly increase bone mineral density.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2021)
Review
Multidisciplinary Sciences
Tiago Pires, John W. C. Dunlop, Paulo Rui Fernandes, Andre P. G. Castro
Summary: Computational fluid dynamics (CFD) analysis tools have been used in bone tissue engineering (BTE) to design optimal scaffolds for promoting bone growth and repair. However, there is a lack of studies that specify the application of the scaffolds and use optimization methods to improve scaffold design.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Chemistry, Physical
Tiago H. Pires, John W. C. Dunlop, Andre P. G. Castro, Paulo R. Fernandes
Summary: When designing bone tissue engineering scaffolds, the wall shear stress (WSS) generated by fluid flow is an important factor to consider. This study used computational fluid dynamics (CFD) analysis to evaluate the average WSS in different scaffold topologies and found that a smooth surface topology with tetrahedral elements resulted in 35% higher WSS compared to a non-smooth surface topology with hexahedral elements. The study also demonstrated the efficacy of using the optimization algorithm simulated annealing to design scaffolds with specific average WSS levels.
Review
Chemistry, Multidisciplinary
Barbara Schamberger, Ricardo Ziege, Karine Anselme, Martine Ben Amar, Michal Bykowski, Andre P. G. Castro, Amaia Cipitria, Rhoslyn A. Coles, Rumiana Dimova, Michaela Eder, Sebastian Ehrig, Luis M. Escudero, Myfanwy E. Evans, Paulo R. Fernandes, Peter Fratzl, Liesbet Geris, Notburga Gierlinger, Edouard Hannezo, Ales Iglic, Jacob J. K. Kirkensgaard, Philip Kollmannsberger, Lucja Kowalewska, Nicholas A. Kurniawan, Ioannis Papantoniou, Laurent Pieuchot, Tiago H. V. Pires, Lars D. Renner, Andrew O. Sageman-Furnas, Gerd E. Schroder-Turk, Anupam Sengupta, Vikas R. Sharma, Antonio Tagua, Caterina Tomba, Xavier Trepat, Sarah L. Waters, Edwina F. Yeo, Andreas Roschger, Cecile M. Bidan, John W. C. Dunlop
Summary: Surface curvature plays an important role in biological systems, from cell membranes to tissues and organs. Experimental and theoretical investigations have supported the relevance of surface curvature in biology. This review provides an introduction to the key concepts of surface curvature in biological systems and discusses the challenges in measuring it. The review also highlights the response of cells, tissues, and organisms to curvature, as well as the interplay between the distribution of morphogens or micro-organisms and the emergence of curvature.
ADVANCED MATERIALS
(2023)
Article
Computer Science, Interdisciplinary Applications
R. Matos, P. R. Fernandes, N. Matela, A. P. G. Castro
Summary: The present work developed a method for localizing and automatically segmenting lumbar intervertebral discs (IVD) in 3D from MRI. The method can generate accurate 3D models of the IVD with the distinction of annulus fibrosus (AF) and nucleus pulposus (NP), as well as detecting degenerated IVD. The method showed good performance in segmentation and detection of degeneration.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2023)
Article
Biotechnology & Applied Microbiology
Leonor Jud, Andre P. G. Castro, Rui B. Ruben, Bernardo Feijoo, Filomena J. Ribeiro, Paulo R. Fernandes
Summary: This study investigates the impact of pseudoexfoliation on visual capacity using finite element models and finds that inferior zonular dialysis leads to a greater reduction in accommodative capacity compared to superior zonular dialysis.
BIOENGINEERING-BASEL
(2022)
Article
Biophysics
Nathan D. Camarillo, Rafael Jimenez-Silva, Frances T. Sheehan
Summary: This article discusses the statistical dependence between multiple measurements from the same participant and provides recommendations for using these measurements when they are not independent.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
J. Huet, A. -S. Boureau, A. Sarcher, C. Cornu, A. Nordez
Summary: Standard compression in freehand 3D ultrasound induces a bias in volume calculations, but minimal compression and gel pad methods have similar results. With a trained examiner and precautions, the bias can be minimized and become acceptable in clinical applications.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
C. Lariviere, A. H. Eskandari, H. Mecheri, F. Ghezelbash, D. Gagnon, A. Shirazi-Adl
Summary: Recent developments in musculoskeletal modeling have focused on model customization. Personalization of the spine profile may affect estimates of spinal loading and stability. This study investigates the biomechanical consequences of changes in the spinal profile and finds that personalizing the spine profile has medium to large effects on trunk muscle forces and negligible to small effects on spinal loading and stability.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
Luke T. Mattar, Arash B. Mahboobin, Adam J. Popchak, William J. Anderst, Volker Musahl, James J. Irrgang, Richard E. Debski
Summary: Exercise therapy fails in about 25.0% of cases for individuals with rotator cuff tears, and one reason for this failure may be the inability to strengthen and balance the muscle forces that keep the humeral head in the correct position. This study developed computational musculoskeletal models to compare the net muscle force before and after exercise therapy between successfully and unsuccessfully treated patients. The study found that unsuccessfully treated patients had less inferiorly oriented net muscle forces, which may increase the risk of impingement.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
Natsuki Sado, Takeshi Edagawa, Toshihide Fujimori, Shogo Hashimoto, Yoshikazu Okamoto, Takahito Nakajima
Summary: The existing methods for predicting hip and lumbosacral joint centres in Japanese adults are biased and differ between sexes. We propose new regression equations that consider soft-tissue thickness, sex differences, and a height-directional measure, and validate them using leave-one-out cross-validation.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
Peimin Yu, Xuanzhen Cen, Qichang Mei, Alan Wang, Yaodong Gu, Justin Fernandez
Summary: This study aimed to explore the intra-foot biomechanical differences among individuals with chronic ankle instability (CAI), copers, and healthy individuals during dynamic tasks. The study found that copers and CAI individuals had smaller dorsiflexion angles and copers presented a more eversion position compared to healthy participants. Copers also had greater dorsiflexion angles in the metatarsophalangeal joint and more inversion moments in the subtalar joint during certain tasks. These findings can help in designing interventions to restore ankle joint functions in CAI individuals.
JOURNAL OF BIOMECHANICS
(2024)
Article
Biophysics
Jon Skovgaard Jensen, Anders Holsgaard-Larsen, Anders Stengaard Sorensen, Per Aagaard, Jens Bojsen-Moller
Summary: This study investigates the biomechanical effects of robot-assisted body weight unloading (BWU) on gait patterns in healthy young adults. The results show that dynamic robot-assisted BWU enables reduced kinetic requirements without distorting biomechanically normal gait patterns during overground walking.
JOURNAL OF BIOMECHANICS
(2024)