8,957 results match your criteria architecture mechanical


A biomechanical paradox in fish: swimming and suction feeding produce orthogonal strain gradients in the axial musculature.

Sci Rep 2021 May 14;11(1):10334. Epub 2021 May 14.

Department of Ecology and Evolutionary Biology, Brown University, 80 Waterman Street, Providence, RI, 02912, USA.

The axial musculature of fishes has historically been characterized as the powerhouse for explosive swimming behaviors. However, recent studies show that some fish also use their 'swimming' muscles to generate over 90% of the power for suction feeding. Can the axial musculature achieve high power output for these two mechanically distinct behaviors? Muscle power output is enhanced when all of the fibers within a muscle shorten at optimal velocity. Read More

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Computational Logistics for Container Terminal Handling Systems with Deep Learning.

Authors:
Bin Li Yuqing He

Comput Intell Neurosci 2021 26;2021:5529914. Epub 2021 Apr 26.

School of Transportation, Fujian University of Technology, Fuzhou 350118, China.

Container terminals are playing an increasingly important role in the global logistics network; however, the programming, planning, scheduling, and decision of the container terminal handling system (CTHS) all are provided with a high degree of nonlinearity, coupling, and complexity. Given that, a combination of computational logistics and deep learning, which is just about container terminal-oriented neural-physical fusion computation (CTO-NPFC), is proposed to discuss and explore the pattern recognition and regression analysis of CTHS. Because the liner berthing time (LBT) is the central index of terminal logistics service and carbon efficiency conditions and it is also the important foundation and guidance to task scheduling and resource allocation in CTHS, a deep learning model core computing architecture (DLM-CCA) for LBT prediction is presented to practice CTO-NPFC. Read More

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One-dimensional convolutional neural network-based active feature extraction for fault detection and diagnosis of industrial processes and its understanding via visualization.

ISA Trans 2021 May 7. Epub 2021 May 7.

School of Economics and Management, Tongji University, 4800 CaoAn Road, 201804 Shanghai, PR China.

Feature extraction from process signals enables process monitoring models to be effective in industrial processes. Deep learning presents extensive possibilities for extracting abstract features from image and visual data. However, the main inputs of conventional deep neural networks are large images. Read More

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Aging of PVDF and PES ultrafiltration membranes by sodium hypochlorite: Effect of solution pH.

J Environ Sci (China) 2021 Jun 5;104:444-455. Epub 2021 Jan 5.

Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China. Electronic address:

Sodium hypochlorite (NaClO) is a commonly applied cleaning agent for ultrafiltration membranes in water and wastewater treatment. Long-term exposure to NaClO might change the properties and performance of polymeric membranes, and ultimately shorten membrane lifespan. Active species in NaClO solution vary with solution pH, and the aging effects can change depending on the membrane material. Read More

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Microlattice Metamaterials with Simultaneous Superior Acoustic and Mechanical Energy Absorption.

Small 2021 May 13:e2100336. Epub 2021 May 13.

Department of Mechanical Engineering, National University of Singapore, Singapore, 117575, Singapore.

The advent of 3D printing brought about the possibilities of microlattice metamaterials as advanced materials with the potentials to surpass the functionalities of traditional materials. Sound absorbing materials which are also tough and lightweight are of particular importance as practical engineering materials. There are however a lack of attempts on the study of metamaterials multifunctional for both purposes. Read More

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Root Systems Research for Bioinspired Resilient Design: A Concept Framework for Foundation and Coastal Engineering.

Front Robot AI 2021 26;8:548444. Epub 2021 Apr 26.

Biomimicry Research and Innovation Center BRIC, Myers School of Art and Department of Biology, The University of Akron, Akron, OH, United States.

The continuous increase in population and human migration to urban and coastal areas leads to the expansion of built environments over natural habitats. Current infrastructure suffers from environmental changes and their impact on ecosystem services. Foundations are static anchoring structures dependent on soil compaction, which reduces water infiltration and increases flooding. Read More

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Towards fungal sensing skin.

Fungal Biol Biotechnol 2021 May 12;8(1). Epub 2021 May 12.

Unconventional Computing Laboratory, UWE, Bristol, UK.

A fungal skin is a thin flexible sheet of a living homogeneous mycelium made by a filamentous fungus. The skin could be used in future living architectures of adaptive buildings and as a sensing living skin for soft self-growing/adaptive robots. In experimental laboratory studies we demonstrate that the fungal skin is capable for recognising mechanical and optical stimulation. Read More

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Extracellular Matrix Alignment Directs Provisional Matrix Assembly and Three Dimensional Fibrous Tissue Closure.

Tissue Eng Part A 2021 May 12. Epub 2021 May 12.

Department of Biomedical Engineering, Boston University, Boston, Massachusetts, USA.

Gap closure is a dynamic process in wound healing, in which a wound contracts and a provisional matrix is laid down, to restore structural integrity to injured tissues. The efficiency of wound closure has been found to depend on the shape of a wound, and this shape dependence has been echoed in various studies. While wound shape itself appears to contribute to this effect, it remains unclear whether the alignment of the surrounding extracellular matrix (ECM) may also contribute. Read More

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Shape memory polymer (SMP) scaffolds with improved self-fitting properties.

J Mater Chem B 2021 May 15;9(18):3826-3837. Epub 2021 Apr 15.

Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA.

"Self-fitting" shape memory polymer (SMP) scaffolds prepared as semi-interpenetrating networks (semi-IPNs) with crosslinked linear-poly(ε-caprolactone)-diacrylate (PCL-DA, M∼10 kg mol) and linear-poly(l-lactic acid) (PLLA, M∼15 kg mol) [75/25 wt%] exhibited robust mechanical properties and accelerated degradation rates versus a PCL-DA scaffold control. However, their potential to treat irregular craniomaxillofacial (CMF) bone defects is limited by their relatively high fitting temperature (T∼55 °C; related to the T of PCL) required for shape recovery (i.e. Read More

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Automatic extraction of the mitral valve chordae geometry for biomechanical simulation.

Int J Comput Assist Radiol Surg 2021 May 12. Epub 2021 May 12.

CNRS, Inria, LORIA, Université de Lorraine, Nancy, France.

Purpose: Mitral valve computational models are widely studied in the literature. They can be used for preoperative planning or anatomical understanding. Manual extraction of the valve geometry on medical images is tedious and requires special training, while automatic segmentation is still an open problem. Read More

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Architecture-Dependent Mechano-Adaptation in Single Vascular Smooth Muscle Cells.

J Biomech Eng 2021 May 11. Epub 2021 May 11.

University of Minnesota - Department of Biomedical Engineering, Nils Hasselmo Hall, Room 7-105, 312 Church St. SE, Minneapolis, MN 55455.

Arteries grow and remodel following mechanical perturbation. Vascular smooth muscle cells (VSMCs) within the artery undergo hyperplasia, hypertrophy, or change their contractility following sustained changes in loading. Experimental evidence suggests that VSMCs grow and remodel to maintain a constant transmural stress, or "target" stress. Read More

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Sexual differences in bone porosity, osteocyte density, and extracellular matrix organization due to osteoblastic-specific Bmp2 deficiency in mice.

Bone 2021 May 7:116002. Epub 2021 May 7.

Department of Orthopaedic Surgery, Saint Louis University, St. Louis, MO, United States of America. Electronic address:

Clinical studies have come to conflicting conclusions regarding BMP2 deficiency's link to regulating bone mass and increasing fracture risk. This may be due to the signaling protein having sex- or age-dependent effects. Previous pre-clinical studies have supported a role, but have not adequately determined the physical mechanism causing altered bulk material properties. Read More

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The Use of the Anticoagulant Heparin and Corticosteroid Dexamethasone as Prominent Treatments for COVID-19.

Front Med (Lausanne) 2021 23;8:615333. Epub 2021 Apr 23.

Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, Brasilia, Brazil.

COVID-19 is spreading worldwide at disturbing rates, overwhelming global healthcare. Mounting death cases due to disease complications highlight the necessity of describing efficient drug therapy strategies for severe patients. COVID-19 severity associates with hypercoagulation and exacerbated inflammation, both influenced by ACE2 downregulation and cytokine storm occurrence. Read More

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Structural and mechanical characterization of biofilm-associated bacterial polymer in the emulsification of petroleum hydrocarbon.

3 Biotech 2021 May 25;11(5):239. Epub 2021 Apr 25.

Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela, Odisha 769 008 India.

The marine bacterium PPS-19 isolated from the oil-polluted site of Paradip port, Odisha, India, was found to form a strong biofilm in 2% (v/v) crude oil. Confocal Laser Scanning Microscopy (CLSM) revealed biofilm components along with multi-layered dense biofilm of rod-shaped cells with 64.7 µm thickness. Read More

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A systematic approach to estimating the effectiveness of multi-scale IAQ strategies for reducing the risk of airborne infection of SARS-CoV-2.

Build Environ 2021 Aug 30;200:107926. Epub 2021 Apr 30.

Department of Mechanical and Aerospace Engineering, Syracuse University, 263 Link Hall, Syracuse, NY, 13244, USA.

The unprecedented coronavirus disease 2019 (COVID-19) pandemic caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has made more than 125 million people infected and more than 2.7 million people dead globally. Airborne transmission has been recognized as one of the major transmission routes for SARS-CoV-2. Read More

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Directional Cues in the Tumor Microenvironment due to Cell Contraction against Aligned Collagen Fibers.

Acta Biomater 2021 May 6. Epub 2021 May 6.

University of Wisconsin School of Medicine and Public Health, Department of Cell and Regenerative Biology, 1111 Highland Ave. WIMRII, Madison, WI, 53705; University of Wisconsin Carbone Cancer Center, 600 Highland Ave. Madison, WI, 53705. Electronic address:

It is well established that collagen alignment in the breast tumor microenvironment provides biophysical cues to drive disease progression. Numerous mechanistic studies have demonstrated that tumor cell behavior is driven by the architecture and stiffness of the collagen matrix. However, the mechanical properties within a 3D collagen microenvironment, particularly at the scale of the cell, remain poorly defined. Read More

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Fabrication of Nd and Yb doped NIR emitting nano fluorescent probe: A candidate for bioimaging applications.

Mater Sci Eng C Mater Biol Appl 2021 Jun 1;125:112095. Epub 2021 Apr 1.

Department of Physics, Periyar University, Salem 636 011, Tamil Nadu, India. Electronic address:

The intentional design of rare earth doped luminescent architecture exhibits unique optical properties and it can be considered as a promising and potential probe for optical imaging applications. Calcium fluoride (CaF) nanoparticles doped with optimum concentration of Nd and Yb as sensitizer and activator, respectively, were synthesized by wet precipitation method and characterized by x-ray diffraction (XRD) and photoluminescence. In spite of the fact that the energy transfer takes place from Nd to Yb, the luminescence intensity was found to be weak due to the lattice defects generated from the doping of trivalent cations (Nd and Yb) for divalent host cations (Ca). Read More

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Cochlear supporting cells require GAS2 for cytoskeletal architecture and hearing.

Dev Cell 2021 May 4. Epub 2021 May 4.

Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. Electronic address:

In mammals, sound is detected by mechanosensory hair cells that are activated in response to vibrations at frequency-dependent positions along the cochlear duct. We demonstrate that inner ear supporting cells provide a structural framework for transmitting sound energy through the cochlear partition. Humans and mice with mutations in GAS2, encoding a cytoskeletal regulatory protein, exhibit hearing loss due to disorganization and destabilization of microtubule bundles in pillar and Deiters' cells, two types of inner ear supporting cells with unique cytoskeletal specializations. Read More

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Application of Textile Technology in Tissue Engineering: A review.

Acta Biomater 2021 May 4. Epub 2021 May 4.

School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA; Georgia Tech Manufacturing Institute, Georgia Institute of Technology, Atlanta, GA 30332, USA; H. Milton Stewart School of Industrial and System Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.

One of the key elements in tissue engineering is to design and fabricate scaffolds with tissue-like properties. Among various scaffold fabrication methods, textile technology has shown its unique advantages in mimicking human tissues' properties such as hierarchical, anisotropic, and strain-stiffening properties. As essential components in textile technology, textile patterns affect the porosity, architecture, and mechanical properties of textile-based scaffolds. Read More

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Elliptic Flow of Electrons from Beauty-Hadron Decays in Pb-Pb Collisions at sqrt[s_{NN}]=5.02  TeV.

Phys Rev Lett 2021 Apr;126(16):162001

Central China Normal University, Wuhan, China.

The elliptic flow of electrons from beauty hadron decays at midrapidity (|y|<0.8) is measured in Pb-Pb collisions at sqrt[s_{NN}]=5.02  TeV with the ALICE detector at the LHC. Read More

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