308 results match your criteria: "University Pittsburgh[Affiliation]"

Recent advancements in 3D structure-based molecular generative models have shown promise in expediting the hit discovery process in drug design. Despite their potential, efficiently generating a focused library of candidate molecules that exhibit both effective interactions and structural diversity at a large scale remains a significant challenge. Moreover, current studies often lack comprehensive comparisons to high-throughput virtual screening methods, resulting in insufficient evaluation of their effectiveness.

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Numerical assessment of portal pressure gradient (PPG) based on clinically measured hepatic venous pressure gradient (HVPG) for liver cirrhosis patients.

J Biomech

January 2025

Department of Gastroenterology and Hepatology and West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; Med-X Center for Informatics, Sichuan University, Chengdu, Sichuan 610041, PR China. Electronic address:

Portal hypertension (PH) is the initial and main consequence of liver cirrhosis. Hepatic venous pressure gradient (HVPG) measurement has been widely used to estimate portal pressure gradient (PPG) and detect portal hypertension. However, some clinical studies have found poor correlation between HVPG and PPG, which may lead to the misdiagnosis of portal hypertension.

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Introduction: Controlled, gradually increased venous pressure exposure of lower extremity free flaps (dangling) is common, based on the assumption that this reduces (partial) flap loss. Dangling protocols potentially increase length of hospital stay and resource utilization. We investigated whether: (1) the proportion of partial flap loss 6 weeks after lower extremity free flap reconstruction is non-inferior after uncontrolled exposure compared to gradually increased venous pressure exposure; (2) there is a difference in length of hospital stay and major or minor adverse events 3 months after surgery.

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  • Parents play a crucial role in their children's sports participation, but many worry about the risk of concussions, which may impact their kids' involvement in physical activities.
  • A survey of 452 parents of youth athletes revealed that a significant majority (73.2%) are upset about the possibility of their child getting a concussion, with fear and anxiety levels being notably high; only a small fraction (4.6%) felt unconcerned about it.
  • The study found that factors like a parent's own concussion history and gender (being female) influenced the levels of anxiety regarding concussions in their children.
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The hollow fiber membrane bundle is the functional component of artificial lungs, transferring oxygen to and carbon dioxide from the blood. It is also the primary location of blood clot formation and propagation in these devices. The geometric design of fiber bundles is defined by a narrow set of parameters that determine gas exchange efficiency and blood flow resistance, principally: fiber packing density, path length, and frontal area.

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One goal of this systematic review is to assess whether the pay ratio, that is, the relative difference between the compensation a firm's CEO receives and that of its nonmanagerial employees, is related to subsequent firm performance. A second goal is to identify factors influencing this relationship across publicly traded firms, including the pay ratio's perceived fairness by employees, the firm's business strategy, and related factors.

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  • This study evaluates the effectiveness of Robot-assisted minimally invasive esophagectomy (RAMIE) for treating esophageal cancer at various centers globally, aiming to pinpoint areas for enhancement in surgical outcomes.
  • Over three time periods (2016-2023), data from 28 centers was analyzed, revealing improvements in textbook outcome rates, lymph node yields, and decreased hospital stays, particularly with McKeown procedures.
  • The results showed varying success rates in surgical outcomes and complications, with a noteworthy decrease in anastomotic leakage rates and hospital stays over time, highlighting advancements in surgical techniques.
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Background: Because there are no known treatments that alter the natural course of the pathophysiology of osteoarthritis, nonoperative treatment needs to be compared with known effective treatments that seek to mitigate symptoms or with similarly invasive inert (placebo) treatments to determine effectiveness. Comparing a treatment to an uninformative control group may inappropriately legitimize and support the use of potentially ineffective treatments. We therefore investigated the prevalence of inappropriate control groups in musculoskeletal research and asked whether these are associated with reporting a positive treatment effect.

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Layered double hydroxide (LDH) nanoparticles enable foliar delivery of genetic material, herbicides, and nutrients to promote plant growth and yield. Understanding the foliar uptake route of nanoparticles is needed to maximize their effectiveness and avoid unwanted negative effects. In this study, we investigated how delivering layered double hydroxide ( = 37 ± 1.

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Redox-mediated decoupled seawater direct splitting for H production.

Nat Commun

October 2024

State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, Sichuan University & Shenzhen University, Chengdu, 610065, China.

Seawater direct electrolysis (SDE) using renewable energy provides a sustainable pathway to harness abundant oceanic hydrogen resources. However, the side-reaction of the chlorine electro-oxidation reaction (ClOR) severely decreased direct electrolysis efficiency of seawater and gradually corrodes the anode. In this study, a redox-mediated strategy is introduced to suppress the ClOR, and a decoupled seawater direct electrolysis (DSDE) system incorporating a separate O evolution reactor is established.

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  • Chemical cross-linking coupled with mass spectrometry (CX-MS) effectively identifies distance constraints in macromolecular protein complexes, providing insights into structures under near-native conditions.
  • This study focused on the human α1 glycine receptor (α1 GlyR), using a site-specific chemical cross-linking strategy at position 41 to examine its configuration in the apo state.
  • The results demonstrated significant cross-linking sites both within and between subunits of α1 GlyR, showcasing CX-MS as a valuable method for understanding the structural dynamics of integral membrane protein assemblies.
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Oxidative chemical vapor deposition (oCVD) has emerged as one of the most promising techniques for conjugated polymer deposition, especially for unsubstituted polythiophene thin films. oCVD overcomes the insolubility challenge that unsubstituted polythiophene (PT) presents and adds the ability to control morphological and molecular structure. This control is important for enhancing the performance of devices which incorporate organic conductors.

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Fe nuclear resonance vibrational spectroscopy (NRVS) has been applied to study a series of tetranuclear iron ([Fe]) clusters based on a multidentate ligand platform (L) anchored by a 1,3,5-triarylbenzene linker and pyrazolate or (butylamino)pyrazolate ligand (PzNH Bu). These clusters bear a terminal Fe(iii)-O/OH moiety at the apical position and three additional iron centers forming the basal positions. The three basal irons are connected with the apical iron center a μ-oxido ligand.

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Objective: An up-to-date and thorough literature review is needed to identify factors that influence driver situation awareness (SA) during control transitions in conditionally automated vehicles (AV). This review also aims to ascertain SA components required for takeovers, aiding in the design and evaluation of human-vehicle interfaces (HVIs) and the selection of SA assessment methodologies.

Background: Conditionally AVs alleviate the need for continuous road monitoring by drivers yet necessitate their reengagement during control transitions.

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MEMS-based meta-emitter with actively tunable radiation power characteristic.

Discov Nano

August 2024

School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510006, China.

We propose a meta-emitter based on micro-electro-mechanical system (MEMS) technology. The main structure of the meta-emitter unit cell is composed of four symmetrically split crosses of Au and SiO bilayer cantilevers. By changing the size of the cantilevers, this MEMS-based meta-emitter can realize the tunable perfect absorption, and the absorption spectrum is within the longwave infrared (LWIR) wavelength from 8.

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The search methods used in systematic reviews provide the foundation for establishing the body of literature from which conclusions are drawn and recommendations made. Searches should aim to be comprehensive and reporting of search methods should be transparent and reproducible. Campbell Collaboration systematic reviews strive to adhere to the best methodological guidance available for this type of searching.

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Stochastic lattice-based porous implant design for improving the stress transfer in unicompartmental knee arthroplasty.

J Orthop Surg Res

August 2024

Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu, 610041, China.

Background: Unicompartmental knee arthroplasty (UKA) has been proved to be a successful treatment for osteoarthritis patients. However, the stress shielding caused by mismatch in mechanical properties between human bones and artificial implants remains as a challenging issue. This study aimed to properly design a bionic porous tibial implant and evaluate its biomechanical effect in reconstructing stress transfer pathway after UKA surgery.

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The terahertz (THz) metamaterials integrated with microelectromechanical systems (MEMS) have led to the realization of dynamic control in amplitude, phase, polarization, and spin angular momentum of the THz wave. In this study, we demonstrate an MEMS-based reconfigurable THz metamaterial (RTM) composed of a split ring resonator (SRR) for real-time modulation of THz wave. By gradually increasing the polarization angle of the incident THz wave, the resonant frequency of SRR switches from 0.

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The Central Sensitization Inventory Measures Thoughts and Emotions.

J Patient Exp

August 2024

Department of Orthopaedic Surgery, University Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA.

To determine if the Central Sensitization Inventory questionnaire (CSI) functions as a mental health measure among a cross-section of people seeking musculoskeletal specialty care, we asked: (1) What is the association of CSI total score and item groupings identified in factor analysis with mental health measures? and (2) What is the association between specific CSI items that represent each factor well and specific mental health measures? One hundred and fifty-seven adults seeking specialty care for musculoskeletal symptoms completed the CSI, a measure of catastrophic thinking, and 3 measures of distress (symptoms of health anxiety, general anxiety, and depression). Exploratory factor analysis was used to identify item groupings. Exploratory factor analysis identified 4 item groupings (factors): (1) thoughts and feelings (mental health), accounting for 52% of the variation in the CSI, (2) urinary and visual symptoms (15%) (3) body aches (10%), and (4) jaw pain (8.

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Purpose: We studied variation in interpretation of specific symptoms during clinical tests for carpal tunnel syndrome to estimate the degree to which surgeons consider pain without paresthesia characteristic of median neuropathy.

Methods: We invited all upper-extremity surgeon members of the Science of Variation Group to complete a scenario-based experiment. Surgeons read 5-10 clinical vignettes of patients with variation in patient demographics and random variation in symptoms and signs as follows: primary symptoms (nighttime numbness and tingling, constant numbness and loss of sensibility, pain with activity), symptoms elicited by a provocative test (Phalen, Durkan, or Tinel) (tingling, pain), and location of symptoms elicited by the provocative test (index and middle fingers, thumb and index fingers, little and ring fingers, entire hand).

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Article Synopsis
  • * It aims to evaluate how effective these interventions are in empowering women economically in low to middle-income countries, considering various barriers and facilitators to their involvement.
  • * A comprehensive search was conducted across numerous academic databases and relevant organizations to gather studies that assess women's engagement in agricultural value chains.
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