4,662 results match your criteria: "GS Engineering & Construction Research Center[Affiliation]"

Event-triggered adaptive neural prescribed performance admittance control for constrained robotic systems without velocity measurements.

ISA Trans

November 2024

College of Electrical and Information Engineering, Hunan University, Changsha 410082, China; National Engineering Research Center for Robot Vision Sensing and Control Technology, Hunan University, Changsha 410082, China. Electronic address:

In this paper, an event-triggered adaptive neural prescribed performance admittance control (ETANPPAC) scheme is proposed to control the constrained robotic systems without velocity sensors. To ensure compliance during human-robot interaction, the reference trajectory is obtained by reshaping the desired trajectory for the robotic systems based on the admittance relationship, where a saturation function is used to constrain the reference trajectory, avoiding excessive contact forces that could render the trajectory inexecutable. Moreover, a barrier Lyapunov function is used to constrain the tracking errors for prescribed performance, where a velocity observer and a radial basis function neural network are designed to estimate the velocity and the uncertainty of the robotic systems, respectively, to enhance control performance.

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Influence of Large-Scale Brain State Dynamics on the Evoked Response to Brain Stimulation.

J Neurosci

September 2024

Centre for Engineering-Led Brain Research, School of Mechatronic Systems Engineering, Simon Fraser University, Surrey, British Columbia V3T 0A3, Canada

Understanding how spontaneous brain activity influences the response to neurostimulation is crucial for the development of neurotherapeutics and brain-computer interfaces. Localized brain activity is suggested to influence the response to neurostimulation, but whether fast-fluctuating (i.e.

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The cellular and molecular heterogeneity of tumors is a major obstacle to cancer immunotherapy. Here, we use a systems biology approach to derive a signature of the main sources of heterogeneity in the tumor microenvironment (TME) from lung cancer transcriptomics. We demonstrate that this signature, which we called , is conserved in different cancers and associated with antitumor immunity.

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Current tools for functionally profiling T cell receptors with respect to cytotoxic potency and cross-reactivity are hampered by difficulties in establishing model systems to test these proteins in the contexts of different HLA alleles and against broad arrays of potential antigens. We have implemented a granzyme-activatable sensor of T cell cytotoxicity in a universal prototyping platform which enables facile recombinant expression of any combination of TCR-, peptide-, and class I MHC-coding sequences and direct assessment of resultant responses. This system consists of an engineered cell platform based on the immortalized natural killer cell line, YT-Indy, and the MHC-null antigen-presenting cell line, K562.

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Nitrogen removal strategy for real swine wastewater by combining partial nitrification-denitrification process with anammox.

Chemosphere

September 2024

Department of Environmental Engineering, National Cheng Kung University, Tainan, 70101, Taiwan; Sustainable Environment Research Laboratory (SERL), National Cheng Kung University, Tainan, 70101, Taiwan. Electronic address:

Anammox process offers reduced operational cost and energy requirement compared to nitrification-denitrification methods due to lower biomass generation and no need for external carbon sources and aeration. High ammonia concetration and low biodegradable anaerobic digester of swaine wastewater provided an advantage for the growth of anammox microorangism. An anoxic/oxic (A/O) SBR and an anammox SBR were implemented parallelly to treat the same swine wastewater with partial nitrification/denitrification and partial nitrification/anammox process, respectively, and to compare their nitrogen removal efficiency.

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Chromium (Cr) toxicity hampers ornamental crops' growth and post-harvest quality, especially in cut flower plants. Nano-enabled approaches have been developing with phenomenal potential towards improving floricultural crop production under heavy metal-stressed conditions. The current pot experiment aims to explore the ameliorative impact of silicon nanoparticles (Si-NPs; 10 mM) and indole butyric acid (IBA; 20 mM) against Cr stress (0.

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Enhancing orthopedic outcomes: A comparative analysis of gentamicin sulphate and nanosilver in bone cement.

Heliyon

August 2024

Yıldız Technical University, Faculty of Chemistry and Metallurgy, Department of Metallurgy and Materials Engineering, Istanbul, 34349, Turkiye.

Background: Orthopedic surgeries frequently utilize bone cement, which can increase the risk of postoperative infections. Addressing this challenge, this study aims to enhance the mechanical, physical, and handling properties of bone cement by integrating gentamicin sulfate (GS) and nanosilver (nAg). The objective is to evaluate and compare the effects of these additives on properties such as compressive strength, flexural strength, doughing time, working time, setting time, and exothermic temperature.

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Imaging through dynamic scattering media is one of the most challenging yet fascinating problems in optics, with applications spanning from biological detection to remote sensing. In this study, we propose a comprehensive learning-based technique that facilitates real-time, non-invasive, incoherent imaging of real-world objects through dense and dynamic scattering media. We conduct extensive experiments, demonstrating the capability of our technique to see through turbid water and natural fog.

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In this study, the full-length cDNA sequences of the phosphatidylinositol-3-kinase p85 alpha (PI3KR1) and serine/threonine kinase 1 (AKT1) genes in largemouth bass (Micropterus salmoides) were obtained using the rapid amplification of cDNA ends (RACE) method. Sequence analysis revealed that the cloned sequences of PI3KR1 and AKT1 are 4170 bp and 3672 bp in length, with open reading frames (ORFs) of 1389 bp and 1422 bp encoding 462 and 473 amino acids, respectively. Sequence alignment and evolutionary tree analysis indicated their close relationship to other teleosts, especially those with similar feeding habits.

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Aims: This study aimed to investigate branched-chain amino acid (BCAA) catabolism in diabetic retinopathy (DR).

Methods: Wild-type and db/db mice were fed BCAAs (5 or 10 mg/kg/day) for 12 weeks, and hyperglycemia-exposed Müller cells were treated with BCAAs (2 or 5 mmol/L) for 24 and 48 h. BCAA levels were measured using MS/MS.

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Structure Elucidation of Pharmaceutically Relevant Compounds Within Pyrene-Based Frameworks.

Chemistry

December 2024

Analytical Research and Development, Merck & Co., Inc., Rahway, New Jersey, 07065, United States of America.

Single-crystal X-ray diffraction (SCXRD) is the preferred and most accurate technique for determining molecular structures. However, it can present challenges when dealing with specific small molecules and active pharmaceutical ingredients (APIs), as many do not form quality crystals without coformers or can be unstable. In this study, we introduce tetrakis(guanidinium) pyrenetetrasulfonate (GPYR), a robust guanidinium-organosulfonate (GS) framework that efficiently encapsulates small molecules and APIs rich in functional groups.

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Progress on critical cell fabrication parameters and designs for advanced lithium-sulfur batteries.

Chem Commun (Camb)

October 2024

Department of Materials Science and Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 70101, Taiwan.

Article Synopsis
  • Since 1990, lithium-ion batteries have improved, nearing their limits, but costs have increased, prompting interest in lithium-sulfur batteries for their higher energy density and cost-effectiveness.
  • Lithium-sulfur cells face issues like material loss, high electrolyte use, and quick deterioration of lithium-metal anodes, driving research to improve cell designs and experiment with new materials.
  • The article examines the challenges and advancements in lithium-sulfur technology since 2020, focusing on high-loading sulfur cathodes and innovative electrolytes, while outlining future research goals to enhance their practical use.
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Myocilin-associated glaucoma is a protein-conformational disorder associated with formation of a toxic amyloid-like aggregate. Numerous destabilizing single point variants, distributed across the myocilin olfactomedin β-propeller (OLF, myocilin residues 245-504, 30 kDa) are associated with accelerated disease progression. , wild type (WT) OLF can be promoted to form thioflavin T (ThT)-positive fibrils under mildly destabilizing (37°C, pH 7.

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Article Synopsis
  • - Parkinson's disease (PD) is a serious neurodegenerative disorder, and rising cases emphasize the need to identify factors that can be changed to reduce risk.
  • - A study involving 8,647 PD patients and 777,693 controls identified a new link between rare ITSN1 gene variants and PD, supported by other research databases.
  • - The research suggests that issues with Rho GTPases and synaptic vesicle transport might play a role in PD development, indicating potential new treatment strategies.
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Solid-state lithium-sulfur batteries (SSLSBs) have attracted a great deal of attention because of their high theoretical energy density and intrinsic safety. However, their practical applications are severely impeded by slow redox kinetics and poor cycling stability. Herein, we revealed the detrimental effect of aggregation of lithium polysulfides (LiPSs) on the redox kinetics and reversibility of SSLSBs.

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(1) To investigate longitudinal associations between grip strength (GS) and cognition over 4 years in European older adults, (2) to examine differences in temporal associations between men and women and between levels of physical activity, (3) to explore in each year 2015 and 2019 associations between GS quartiles and cognitive performance, and (4) to explore longitudinal associations between GS quartiles (year 2015) and cognitive performance (year 2019). 25,281 individuals (14,200 women) from 17 European countries aged ≥50 years responded to waves 6th and 8th of the SHARE project. We analyzed GS, a general cognition index, and physical activity level.

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Article Synopsis
  • Scientists are studying how to get useful substances, called phenolic antioxidants, from grape seeds left over after making wine, which is good for the environment and could save money.
  • They used special mixtures called deep eutectic solvents to help extract these antioxidants, trying different recipes to see what works best.
  • The best results were found when they used a mix of ethylene glycol and acetic acid with 50% water added, worked for 85 seconds, and used a small amount of grape seeds.
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Introduction: Botulinum toxin type A (BoNT/A) is an effective non-surgical method for treating gummy smile (GS). This systematic review evaluated the efficacy, duration, and safety of different BoNT/A injections.

Methods: Four electronic databases were searched for relevant literature, generating 1106 references.

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Exploring the acceptance of robotic assisted surgery among the Indian population: An empirical investigation.

F1000Res

August 2024

Department of Biomedical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.

Background: Technology has completely transformed healthcare, starting with X-ray machines and MRIs to telehealth and robotic surgeries to e-health records. The launch of minimally invasive surgery (MIS) serves as a milestone in medical history, offering benefits such as smaller incisions, shorter hospital stays, and faster recovery, making it a preferred surgical option. This study mainly explores patients' willingness to adopt robot-assisted surgery (RAS) technology in a surgical intervention and is assessed in the backdrop of the Technology Acceptance Model (TAM).

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Characterization of Great Toe Extension Strength Using ToeScale-A Novel Portable Device.

Sensors (Basel)

July 2024

Department of Occupational Therapy, College of Public Health and Health Professions, University of Florida, Gainesville, FL 32611, USA.

Article Synopsis
  • - The study investigates the relationship between great toe strength (GTS) and balance/mobility, focusing specifically on great toe extension strength (GTES) and how it's often overlooked in clinical evaluations.
  • - Researchers used the ToeScale and hand-grip dynamometer to measure GTES and grip strength, analyzing data from 31 participants to find that males generally had higher GTES than females across age groups.
  • - Findings indicated that GTES associations with age, sex, BMI, and grip strength vary, with machine learning models showing low-to-moderate accuracy compared to traditional analysis; further research with larger samples and improved models is necessary.
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Large datasets in paediatric oncology are inherently rare. Therefore, it is paramount to fully exploit all available data, which are distributed over several resources, including biomaterials, images, clinical trials, and registries. With privacy-preserving record linkage (PPRL), personalised or pseudonymised datasets can be merged, without disclosing the patients' identities.

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The biodegradability of poly (3-hydroxybutyrate) (PHB)-based food packaging material PHB/5GS/0.7MgO, developed by incorporating 5 wt% grapeseed oil (GS) and 0.7 wt% MgO nanoparticles using solution casting route, was investigated in soil and river water environments.

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Based on the polynomial theory, the error propagation characteristics of the widely used N-step discrete Fourier transform (N-DFT) phase-shift algorithm were analyzed via theoretical analysis, under the effect of Gamma distortion and phase detuning. The results showed that the N-DFT algorithm could not simultaneously suppress both types of error. A robust linear phase-shift (RLPS) algorithm was designed, the performance of the RLPS and 8-DFT algorithms in terms of spectral response, detuning robustness, and was briefly analysis by Manuel Servin method.

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Addressing the increasing demand for green additives in drilling fluids is essential for the sustainable development of the oil and gas industry. Fluid loss into porous and permeable formations during drilling presents significant challenges. This study introduced an innovative, environmentally sustainable drilling fluid known as nano-biodegradable drilling fluid (NBDF).

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Background: Traditional clinical assessments often lack individualization, relying on standardized procedures that may not accommodate the diverse needs of patients, especially in early stages where personalized diagnosis could offer significant benefits. We aim to provide a machine-learning framework that addresses the individualized feature addition problem and enhances diagnostic accuracy for clinical assessments.

Methods: Individualized Clinical Assessment Recommendation System (iCARE) employs locally weighted logistic regression and Shapley Additive Explanations (SHAP) value analysis to tailor feature selection to individual patient characteristics.

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