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Simulation traing

Nuri Yazdani, Tra Nguyen-Thanh, Maksym Yarema, Weyde M M Lin, Ramon Gao, Olesya Yarema, Alexey Bosak, Vanessa Wood
Knowledge of the vibrational structure of a semiconductor is essential for explaining its optical and electronic properties and enabling optimized materials selection for optoelectronic devices. However, measurement or computation of the vibrational density of states of colloidally-synthesized nanocrystals (quantum dots) is challenging. Here, we show that inelastic x-ray scattering (IXS) can be used to measure the vibrational density of states of nanocrystals in thin films. Using IXS, we report the first experimental measurements of the vibrational density of states for lead sulfide nanocrystals with different halide-ion terminations and for CsPbBr3 perovskite nanocrystals...
March 8, 2018: Journal of Physical Chemistry Letters
Tran Van Tra, Nguyen Xuan Thinh, Stefan Greiving
Vu Gia- Thu Bon (VGTB) River Basin, located in the Central Coastal zone of Viet Nam currently faces water shortage. Climate change is expected to exacerbate the challenge. Therefore, there is a need to study the impacts of climate change on water shortage in the river basin. The study adopts a combined top-down and bottom-up climate change impact assessment to address the impacts of climate change on water shortage in the VGTB River Basin. A MIKE BASIN water balance model for the river basin was established to simulate the response of the hydrological system...
February 26, 2018: Science of the Total Environment
Yoshinori Ishii, Hideo Noguchi, Junko Sato, Hana Ishii, Koji Todoroki, Shin-Ichi Toyabe
BACKGROUND: Tibial component coverage (TCC) and tibial rotational angle (TRA) have been studied simultaneously in simulations, but not in clinical studies after total knee arthroplasty (TKA). The purposes of this study were (1) to evaluate TCC and rotational setting postoperatively in mobile-bearing TKA patients and (2) to compare the results with previously published simulation data. METHODS: We prospectively examined 100 patients who underwent primary TKA using the LCS® Total Knee System (LCS) posterior cruciate ligament-substituting prosthesis...
February 10, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Marigianna Marinou, Dimitrios Platis, Farid S Ataya, Evangelia Chronopoulou, Dimitrios Vlachakis, Nikolaos E Labrou
In the present study, a structure-based approach was exploited for the in silico design of a nucleotide coenzyme mimetic ligand. The enzyme formate dehydrogenase (FDH) was employed as a model in our study. The biomimetic ligand was designed and synthesized based on a tryptamine/3-aminopropylphosphonic acid bi-substituted 1,3,5-triazine (Trz) scaffold (Tra-Trz-3APP), which potentially mimics the interactions of NAD+ -FDH complex. Molecular docking studies of the biomimetic ligand predicted that it can occupy the same binding site as the natural coenzyme...
February 2, 2018: Journal of Chromatography. A
Katharina Bluemlein, Manfred Elend, Tim Meijster, Alison Margary, Rosalie Tibaldi, Stefan Hahn, Susanne Hesse
A series of laboratory simulations were conducted in order to determine the airborne protection that might be afforded by different combinations of workplace exposure controls typically encountered when handling volatile solvents (e.g. solvent transfer). These conditions, referred to as risk management measures (RMMs) under the Registration, Evaluation and Authorisation of Chemicals Regulation (REACH), are typically described using standard phrases in safety data sheets [and specifically those of the European Phrase Catalogue (EUPhraC)]...
December 15, 2017: Annals of Work Exposures and Health
Jeong-Soo Kim, Cynn-Heon Seok, Hye-Seon Jeon
The abdominal draw-in maneuver (ADIM) is a method commonly used to reestablish neuromuscular control of the deep spine muscles among individuals with musculoskeletal problems. The purpose of this study was to evaluate the effect of ADIM combined with simulated weight-bearing (SWB) activities in the facilitation of the deep spine muscles. The subjects were 30 young healthy individuals. Ultrasound images were used to measure the relative changes in transverse abdominal (TrA), internal oblique (IO) and external oblique (EO) muscle thickness during a simulated weight-bearing ADIM (SWB-ADIM)...
September 6, 2017: Physiotherapy Theory and Practice
My-Tra Le, Wojciech K Kasprzak, Bruce A Shapiro, Anne E Simon
How plus-strand [+]RNA virus genomes transition from translation templates to replication templates is a matter of much speculation. We have previously proposed that, for Turnip crinkle virus, binding of the encoded RNA-dependent RNA polymerase (RdRp) to the 3'UTR of the [+]RNA template promotes a regional wide-spread conformational switch to an alternative structure that disassembles the cap-independent translation enhancer (CITE) in the 3'UTR. The active 3'CITE folds into a tRNA-like T-shaped structure (TSS) that binds to 80S ribosomes and 60S subunits in the P-site...
November 2, 2017: RNA Biology
My-Tra Le, Wojciech K Kasprzak, Taejin Kim, Feng Gao, Megan Yl Young, Xuefeng Yuan, Bruce A Shapiro, Joonil Seog, Anne E Simon
Turnip crinkle virus contains a T-shaped, ribosome-binding, translation enhancer (TSS) in its 3'UTR that serves as a hub for interactions throughout the region. The viral RNA-dependent RNA polymerase (RdRp) causes the TSS/surrounding region to undergo a conformational shift postulated to inhibit translation. Using optical tweezers (OT) and steered molecular dynamic simulations (SMD), we found that the unusual stability of pseudoknotted element H4a/Ψ3 required five upstream adenylates, and H4a/Ψ3 was necessary for cooperative association of two other hairpins (H5/H4b) in Mg(2+)...
February 13, 2017: ELife
Dustin L Crouch, He Huang
Simple, lumped-parameter musculoskeletal models may be more adaptable and practical for clinical real-time control applications, such as prosthesis control. In this study, we determined whether a lumped-parameter, EMG-driven musculoskeletal model with four muscles could predict wrist and metacarpophalangeal (MCP) joint flexion/extension. Forearm EMG signals and joint kinematics were collected simultaneously from 5 able-bodied (AB) subjects. For one subject with unilateral transradial amputation (TRA), joint kinematics were collected from the sound arm during bilateral mirrored motion...
December 8, 2016: Journal of Biomechanics
Didem Öner Özdaş, Mağrur Kazak, Aylin Çilingir, Meryem Gülce Subaşı, Murat Tiryaki, Şölen Günal
BACKGROUND: Although most of the studies investigated color stability of different restorative materials, evaluation of color stability of composites after immersion in multiple beverages in the same day by an in vitro oral simulation study is unclear. OBJECTIVE: To assess color change of different restorative materials at the end of days 1, 14, and 30 of immersion in multiple liquid types to mimic the oral environment in vitro. METHOD: Ten disc-shaped specimens were made from each of four different resin composites (Filtek Z250, Voco x-tra base, Beautifil Flow Plus, Beautifil II)...
2016: Open Dentistry Journal
M Retournard, A Bilmont, E Asimus, S Palierne, A Autefage
The effects of Tibial Tuberosity Advancement (TTA) on Cranial Tibial Subluxation (CTS) and Tibial Rotation Angle (TRA) were evaluated in a model of feline Cranial Cruciate Ligament (CrCL)-deficient stifle joint. Ten hindlimbs of adult cats were used. Quadriceps and gastrocnemius muscles were simulated using cables, turnbuckles and a spring. An axial load of 30% body weight was applied. The stifle and talocrural joint angles were adjusted to 120°. Patellar tendon angle (PTA), CTS and TRA were measured radiographically before and after CrCL section, after TTA and after additional advancement by 1 and 2mm...
August 2016: Research in Veterinary Science
Kazutoyo Miura, Bruce J Swihart, Bingbing Deng, Luwen Zhou, Thao P Pham, Ababacar Diouf, Timothy Burton, Michael P Fay, Carole A Long
Malaria transmission-blocking vaccines (TBVs) are potentially helpful tools for malaria eradication. The standard membrane-feeding assay (SMFA) is considered one of the "gold standard" assays for TBV development. However, lack of consensus in reporting results from SMFA has made it very challenging to compare results from different studies. Two main readouts, % inhibition in mean oocyst count per mosquito (TRA) and % inhibition in prevalence of infected mosquitoes (TBA), have been used widely. In this study, we statistically modeled the oocyst data in SMFA using data from 105 independent feeding experiments including 9804 mosquitoes...
July 29, 2016: Vaccine
Tobias T Tauböck, Zrinka Tarle, Danijela Marovic, Thomas Attin
OBJECTIVES: To investigate the influence of pre-heating of high-viscosity bulk-fill composite materials on their degree of conversion and shrinkage force formation. METHODS: Four bulk-fill composite materials (Tetric EvoCeram Bulk Fill-TECBF, x-tra fil-XF, QuixFil-QF, SonicFill-SF) and one conventional nano-hybrid resin composite (Tetric EvoCeram-TEC) were used. The test materials were either kept at room temperature or pre-heated to 68°C by means of a commercial heating device, before being photoactivated with a LED curing unit for 20s at 1170mW/cm(2)...
November 2015: Journal of Dentistry
Shruti A Vidhawan, Adrian U Yap, Barbara P Ornaghi, Agnieszka Banas, Krzysztof Banas, Jennifer C Neo, Carmem S Pfeifer, Vinicius Rosa
OBJECTIVES: The aim of this study was to determine the Weibull and slow crack growth (SCG) parameters of bulk-fill resin based composites. The strength degradation over time of the materials was also assessed by strength-probability-time (SPT) analysis. METHODS: Three bulk-fill [Tetric EvoCeram Bulk Fill (TBF); X-tra fil (XTR); Filtek Bulk-fill flowable (BFL)] and a conventional one [Filtek Z250 (Z250)] were studied. Seventy five disk-shaped specimens (12mm in diameter and 1mm thick) were prepared by inserting the uncured composites in a stainless steel split mold followed by photoactivation (1200mW/cm(2)/20s) and storage in distilled water (37°C/24h)...
September 2015: Dental Materials: Official Publication of the Academy of Dental Materials
Ying Wang, Bin-Kuan Chou, Sarah Dowey, Chaoxia He, Sharon Gerecht, Linzhao Cheng
Large-scale production of human induced pluripotent stem cells (hiPSCs) by robust and economic methods has been one of the major challenges for translational realization of hiPSC technology. Here we demonstrate a scalable culture system for hiPSC expansion using the E8 chemically defined and xeno-free medium under either adherent or suspension conditions. To optimize suspension conditions guided by a computational simulation, we developed a method to efficiently expand hiPSCs as undifferentiated aggregates in spinner flasks...
November 2013: Stem Cell Research
Hanadi Y Marghalani, David C Watts
OBJECTIVE: To study time-dependent viscoelastic deformation (creep and recovery) of resin-composites, after conditioning in food-simulating solvents, under a compressive stress at 37°C. METHODS: Five dimethacrylate-based composites: (Spectrum TPH, Premise Body, Tetric Ceram HB, Filtek P60, X-tra fil), and two Ormocers (Experimental Ormocer V 28407, Admira) were studied. Three groups of cylindrical specimens (4mm×6mm) were prepared and then conditioned in 3 solvents: methyl ethyl ketone (MEK), ethanol, and water for 1 month at 37°C...
September 2013: Dental Materials: Official Publication of the Academy of Dental Materials
Wei Jie Jensen Ang, Michael Edward Hopkins, Roland Partridge, Iain Hennessey, Paul Martin Brennan, Ioannis Fouyas, Mark Antony Hughes
BACKGROUND: Reductions in working hours affect training opportunities for surgeons. Surgical simulation is increasingly proposed to help bridge the resultant training gap. For simulation training to translate effectively into the operating theater, acquisition of technical proficiency must be objectively assessed. Evaluating "economy of movement" is one way to achieve this. OBJECTIVE: We sought to validate a practical and economical method of assessing economy of movement during a simulated task...
March 2014: Neurosurgery
Agnese Miro, Ivana d'Angelo, Antonella Nappi, Pietro La Manna, Marco Biondi, Laura Mayol, Pellegrino Musto, Roberto Russo, Maria Immacolata La Rotonda, Francesca Ungaro, Fabiana Quaglia
Inspired by the multiple roles cyclodextrins can play in polymeric systems, here we engineered poly(ethylene oxide) (PEO) films with (2-hydroxypropyl)-β-cyclodextrin (CD) as multipurpose ingredient. To shed light on the potential of CD in formulating PEO buccal films for the delivery of poorly water-soluble drugs, we preliminarily assessed thermal and mechanical properties as well as wettability of films prepared at different PEO/CD ratios. PEO/CD platform containing 54% by weight of CD was chosen as the optimized composition since it matched acceptable mechanical properties, in terms of tensile strength and elasticity, with a good wettability...
August 16, 2013: International Journal of Pharmaceutics
Nicoleta Ilie, Andreas Keßler, Jürgen Durner
OBJECTIVES: To assess the effect of irradiation time and distance of the light tip on the micro-mechanical properties and polymerisation kinetics of two bulk-fill resin-based composites at simulated clinically relevant filling depth. METHODS: Micro-mechanical properties (Vickers hardness (HV), depth of cure (DOC) and indentation modulus (E)) and polymerisation kinetics (real-time increase of degree of cure (DC)) of two bulk-fill resin-based composites (Tetric EvoCeram(®) Bulk Fill, Ivoclar Vivadent and x-tra base, Voco) were assessed at varying depth (0...
August 2013: Journal of Dentistry
Mark G Orr, Roxanne Thrush, David C Plaut
The reasoned action approach, although ubiquitous in health behavior theory (e.g., Theory of Reasoned Action/Planned Behavior), does not adequately address two key dynamical aspects of health behavior: learning and the effect of immediate social context (i.e., social influence). To remedy this, we put forth a computational implementation of the Theory of Reasoned Action (TRA) using artificial-neural networks. Our model re-conceptualized behavioral intention as arising from a dynamic constraint satisfaction mechanism among a set of beliefs...
2013: PloS One
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