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Validation cost effectiveness simulation

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https://www.readbyqxmd.com/read/28431428/computational-and-in-vitro-experimental-investigation-of-intrathecal-drug-distribution-parametric-study-of-the-effect-of-injection-volume-cerebrospinal-fluid-pulsatility-and-drug-uptake
#1
Kevin M Tangen, Roxanne Leval, Ankit I Mehta, Andreas A Linninger
BACKGROUND: Intrathecal drug delivery is an attractive option to circumvent the blood-brain barrier for pain management through its increased efficacy of pain relief, reduction in adverse side effects, and cost-effectiveness. Unfortunately, there are limited guidelines for physicians to choose infusion or drug pump settings to administer therapeutic doses to specific regions of the spine or the brain. Although empiric trialing of intrathecal drugs is critical to determine the sustained side effects, currently there is no inexpensive in vitro method to guide the selection of spinal drug delivery parameters...
May 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28431361/uncertainty-quantification-and-validation-of-3d-lattice-scaffolds-for-computer-aided-biomedical-applications
#2
Recep M Gorguluarslan, Seung-Kyum Choi, Christopher J Saldana
A methodology is proposed for uncertainty quantification and validation to accurately predict the mechanical response of lattice structures used in the design of scaffolds. Effective structural properties of the scaffolds are characterized using a developed multi-level stochastic upscaling process that propagates the quantified uncertainties at strut level to the lattice structure level. To obtain realistic simulation models for the stochastic upscaling process and minimize the experimental cost, high-resolution finite element models of individual struts were reconstructed from the micro-CT scan images of lattice structures which are fabricated by selective laser melting...
April 12, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28425890/biomedical-simulation-evolution-concepts-challenges-and-future-trends
#3
Carla Sá-Couto, Luís Patrão, Francisco Maio-Matos, José Miguel Pêgo
Biomedical simulation is an effective educational complement for healthcare training, both at undergraduate and postgraduate level. It enables knowledge, skills and attitudes to be acquired in a safe, educationally orientated and efficient manner. In this context, simulation provides skills and experience that facilitate the transfer of cognitive, psychomotor and proper communication competences, thus changing behavior and attitudes, and ultimately improving patient safety. Beyond the impact on individual and team performance, simulation provides an opportunity to study organizational failures and improve system performance...
December 30, 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28425488/an-analytic-approach-for-optimal-geometrical-design-of-gaas-nanowires-for-maximal-light-harvesting-in-photovoltaic-cells
#4
Dan Wu, Xiaohong Tang, Kai Wang, Xianqiang Li
Semiconductor nanowires(NWs) with subwavelength scale diameters have demonstrated superior light trapping features, which unravel a new pathway for low cost and high efficiency future generation solar cells. Unlike other published work, a fully analytic design is for the first time proposed for optimal geometrical parameters of vertically-aligned GaAs NW arrays for maximal energy harvesting. Using photocurrent density as the light absorbing evaluation standard, 2 μm length NW arrays whose multiple diameters and periodicity are quantitatively identified achieving the maximal value of 29...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28420531/high-throughput-determination-of-vancomycin-in-human-plasma-by-a-cost-effective-system-of-two-dimensional-liquid-chromatography
#5
Yanghao Sheng, Boting Zhou
Therapeutic drug monitoring (TDM) is one of the most important services of clinical laboratories. Two main techniques are commonly used: the immunoassay and chromatography method. We have developed a cost-effective system of two-dimensional liquid chromatography with ultraviolet detection (2D-LC-UV) for high-throughput determination of vancomycin in human plasma that combines the automation and low start-up costs of the immunoassay with the high selectivity and sensitivity of the liquid chromatography coupled with mass spectrometric detection without incurring their disadvantages, achieving high cost-effectiveness...
February 27, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28420333/strategies-and-cost-effectiveness-evaluation-of-persistent-albuminuria-screening-among-high-risk-population-of-chronic-kidney-disease
#6
Huaiyu Wang, Li Yang, Fang Wang, Luxia Zhang
BACKGROUND: Screening for persistent albuminuria among the high-risk population is important for early detection of CKD while studies regarding screening protocol and related cost-effectiveness analysis are limited. This study explored a feasible and cost-efficient screening strategy for detecting persistent albuminuria among the high-risk population. METHODS: A cohort study including 157 clinically stable outpatients with a risk factor of CKD and whose laboratory tests revealed an albumin-creatinine-ratio (ACR) between 30 and 300 mg/g of creatinine during the previous 12 months was conducted to assess the validity of alternative screening strategies...
April 18, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28409648/assessment-of-simulated-emergency-scenarios-are-trained-observers-necessary
#7
Juliane Noveanu, Felix Amsler, Wolfgang Ummenhofer, Thomas von Wyl, Mathias Zuercher
OBJECTIVES: Simulation-based medical training is associated with superior educational outcomes and improved cost efficiency. Self- and peer-assessment may be a cost-effective and flexible alternative to expert-led assessment. We compared accuracy of self- and peer-assessment of untrained raters using basic evaluation tools to expert assessment using advanced validation tools including validated questionnaires and post hoc video-based analysis. METHODS: Twenty-eight simulated emergency airway management scenarios were observed and video-recorded for further assessment...
April 14, 2017: Prehospital Emergency Care
https://www.readbyqxmd.com/read/28390355/optimizing-the-formation-of-solid-solutions-with-components-of-different-shapes
#8
Fernando A Escobedo
A key challenge to engineer ordered solids from the co-assembly of two differently shaped building blocks is to predict the key particle characteristics that lead to maximal mutual ordered-phase compatibility (MaxOC). While both entropy disparity, as captured by the relative size of the components, and energetic inter-species selectivity affect MaxOC, it is the former whose effect is less intuitive and the main focus of this work. Such MaxOC predictive rules are formulated and validated by using Monte Carlo simulation results for hard-core mixtures of octahedra and spheres and of other previously studied mixtures...
April 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28388112/wavelet-monte-carlo-dynamics-a-new-algorithm-for-simulating-the-hydrodynamics-of-interacting-brownian-particles
#9
Oliver T Dyer, Robin C Ball
We develop a new algorithm for the Brownian dynamics of soft matter systems that evolves time by spatially correlated Monte Carlo moves. The algorithm uses vector wavelets as its basic moves and produces hydrodynamics in the low Reynolds number regime propagated according to the Oseen tensor. When small moves are removed, the correlations closely approximate the Rotne-Prager tensor, itself widely used to correct for deficiencies in Oseen. We also include plane wave moves to provide the longest range correlations, which we detail for both infinite and periodic systems...
March 28, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28379984/potential-trajectories-of-the-upcoming-forest-trading-mechanism-in-par%C3%A3-state-brazilian-amazon
#10
Brenda Brito
In 2012, the Brazilian government revised the federal Forest Code that governs the use of forest resources on rural properties. The revisions included a forest trading mechanism whereby landowners who deforested more than what is legally allowed before 2008 could absolve their deforestation "debts" by purchasing Environmental Reserve Quotas (CRA) from landowners who conserved more forest than legally required. CRA holds promise as a tool to complement command-and-control initiatives to reduce deforestation and incentivize restoration...
2017: PloS One
https://www.readbyqxmd.com/read/28374022/a-coarse-grained-model-for-assisting-the-investigation-of-structure-and-dynamics-of-large-nucleic-acids-by-ion-mobility-spectrometry-mass-spectrometry
#11
S Vangaveti, R J D'Esposito, J L Lippens, D Fabris, S V Ranganathan
Ion Mobility Spectrometry-Mass Spectrometry (IMS-MS) is a rapidly emerging tool for the investigation of nucleic acid structure and dynamics. IMS-MS determinations can provide valuable information regarding alternative topologies, folding intermediates, and conformational heterogeneities, which are not readily accessible to other analytical techniques. The leading strategies for data interpretation rely on computational and experimental approaches to correctly assign experimental observations to putative structures...
April 4, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28369405/cost-effectiveness-of-an-hpv-self-collection-campaign-in-uganda-comparing-models-for-delivery-of-cervical-cancer-screening-in-a-low-income-setting
#12
Nicole G Campos, Vivien Tsu, Jose Jeronimo, Denise Njama-Meya, Mercy Mvundura, Jane J Kim
With the availability of a low-cost HPV DNA test that can be administered by either a healthcare provider or a woman herself, programme planners require information on the costs and cost-effectiveness of implementing cervical cancer screening programmes in low-resource settings under different models of healthcare delivery. Using data from the START-UP demonstration project and a micro-costing approach, we estimated the health and economic impact of once-in-a-lifetime HPV self-collection campaign relative to clinic-based provider-collection of HPV specimens in Uganda...
February 20, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/28355531/using-a-genome-scale-metabolic-network-model-to-elucidate-the-mechanism-of-chloroquine-action-in-plasmodium-falciparum
#13
Shivendra G Tewari, Sean T Prigge, Jaques Reifman, Anders Wallqvist
Chloroquine, long the default first-line treatment against malaria, is now abandoned in large parts of the world because of widespread drug-resistance in Plasmodium falciparum. In spite of its importance as a cost-effective and efficient drug, a coherent understanding of the cellular mechanisms affected by chloroquine and how they influence the fitness and survival of the parasite remains elusive. Here, we used a systems biology approach to integrate genome-scale transcriptomics to map out the effects of chloroquine, identify targeted metabolic pathways, and translate these findings into mechanistic insights...
March 22, 2017: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/28343953/development-and-validation-of-a-novel-and-cost-effective-animal-tissue-model-for-training-transurethral-resection-of-the-prostate
#14
Sichuan Hou, Gillian Ross, Iain Tait, Paul Halliday, Benjie Tang
OBJECTIVES: To develop and validate a new and cost-effective animal tissue training model for practicing resection skills of transurethral resection of the prostate (TURP). METHODS AND MATERIALS: A porcine kidney was prepared and restructured to simulate the relevant anatomy of the human prostate. The restructured prostate was connected to an artificial urethra and bladder. Face, content, and construct validity of the model was carried out using a 5-point Likert scale questionnaire, and comparison in task performance between participants and experts was made using observational clinical human reliability analysis...
March 23, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28343709/a-distributed-model-predictive-control-based-load-frequency-control-scheme-for-multi-area-interconnected-power-system-using-discrete-time-laguerre-functions
#15
Yang Zheng, Jianzhong Zhou, Yanhe Xu, Yuncheng Zhang, Zhongdong Qian
This paper proposes a distributed model predictive control based load frequency control (MPC-LFC) scheme to improve control performances in the frequency regulation of power system. In order to reduce the computational burden in the rolling optimization with a sufficiently large prediction horizon, the orthonormal Laguerre functions are utilized to approximate the predicted control trajectory. The closed-loop stability of the proposed MPC scheme is achieved by adding a terminal equality constraint to the online quadratic optimization and taking the cost function as the Lyapunov function...
March 23, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28343164/a-quantitative-concordance-measure-for-comparing-and-combining-treatment-selection-markers
#16
Zhiwei Zhang, Shujie Ma, Lei Nie, Guoxing Soon
Motivated by an HIV example, we consider how to compare and combine treatment selection markers, which are essential to the notion of precision medicine. The current literature on precision medicine is focused on evaluating and optimizing treatment regimes, which can be obtained by dichotomizing treatment selection markers. In practice, treatment decisions are based not only on efficacy but also on safety, cost and individual preference, making it difficult to choose a single cutoff value for all patients in all settings...
March 25, 2017: International Journal of Biostatistics
https://www.readbyqxmd.com/read/28339561/computational-models-used-to-assess-us-tobacco-control-policies
#17
Shari P Feirman, Allison M Glasser, Shyanika Rose, Ray Niaura, David B Abrams, Lyubov Teplitskaya, Andrea C Villanti
Introduction: Simulation models can be used to evaluate existing and potential tobacco control interventions, including policies. The purpose of this systematic review was to synthesize evidence from computational models used to project population-level effects of tobacco control interventions. We provide recommendations to strengthen simulation models that evaluate tobacco control interventions. Methods: Studies were eligible for review if they employed a computational model to predict the expected effects of a non-clinical US-based tobacco control intervention...
January 21, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28330250/deciphering-the-evolutionary-affiliations-among-bacterial-strains-pseudomonas-and-frankia-sp-inhabiting-same-ecological-niche-using-virtual-rflp-and-simulation-based-approaches
#18
Meenakshi Srivastava, Manish Singh Kaushik, Amrita Srivastava, Anumeha Singh, Ekta Verma, Arun Kumar Mishra
To decipher an evolutionary lineage between two different but important bacterial groups, i.e., Pseudomonas strain (γ-Proteobacteria) and Frankia strain (actinobacteria) growing in the same ecological niche in and around of an actinorhizal plant Hippophae salicifolia D. Don, genetic diversity and comparative molecular phylogeny have been investigated using 16S rRNA gene sequences and computer-simulated and virtually directed restriction fragment length polymorphism (RFLP) through 10 restriction enzymes. Bayesian and coalescent analyses on the basis of 16S rRNA gene sequences suggested three major groups with close proximity between Pseudomonas and Frankia isolates...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28314392/combining-simplicity-with-cost-effectiveness-investigation-of-potential-counterfeit-of-proton-pump-inhibitors-through-simulated-formulations-using-thin-layer-chromatography
#19
Nejal M Bhatt, Vijay D Chavada, Mallika Sanyal, Pranav S Shrivastav
A simple, accurate and precise high-performance thin-layer chromatographic method has been developed and validated for the analysis of proton pump inhibitors (PPIs) and their co-formulated drugs, available as binary combination. Planar chromatographic separation was achieved using a single mobile phase comprising of toluene: iso-propranol: acetone: ammonia 5.0:2.3:2.5:0.2 (v/v/v/v) for the analysis of 14 analytes on aluminium-backed layer of silica gel 60 FG254. Densitometric determination of the separated spots was done at 290nm...
November 18, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28304353/phase-error-correction-for-approximated-observation-based-compressed-sensing-radar-imaging
#20
Bo Li, Falin Liu, Chongbin Zhou, Yuanhao Lv, Jingqiu Hu
Defocus of the reconstructed image of synthetic aperture radar (SAR) occurs in the presence of the phase error. In this work, a phase error correction method is proposed for compressed sensing (CS) radar imaging based on approximated observation. The proposed method has better image focusing ability with much less memory cost, compared to the conventional approaches, due to the inherent low memory requirement of the approximated observation operator. The one-dimensional (1D) phase error correction for approximated observation-based CS-SAR imaging is first carried out and it can be conveniently applied to the cases of random-frequency waveform and linear frequency modulated (LFM) waveform without any a priori knowledge...
March 17, 2017: Sensors
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