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https://www.readbyqxmd.com/read/28817666/assessing-the-sustainable-development-and-intensification-potential-of-beef-cattle-production-in-sumbawa-indonesia-using-a-system-dynamics-approach
#1
Dahlanuddin, Benjamin Henderson, Kanar Dizyee, Hermansyah, Andrew Ash
The intensification of beef cattle production in dryland areas of East Indonesia has the potential to substantially raise the incomes of smallholder farmers that dominate the sector. In this study we assess the potential for intensifying beef production on Sumbawa Island, by introducing a household feedlot production system (2-20 animals) based on the Leucaena leucocephala (leucanea) tree legume as an improved source of feed. We used a system dynamics approach to model the entire value chain, accounting for herd dynamics, demand dynamics and seasonality...
2017: PloS One
https://www.readbyqxmd.com/read/28817473/scaffolding-interprofessional-education-unfolding-case-studies-virtual-world-simulations-and-patient-centered-care
#2
Sharon Strang Zook, Linda J Hulton, Carol C Dudding, Anne L Stewart, Amy C Graham
Fragmentation of health care negatively impacts quality; one of the contributing factors may be ineffective collaboration among health care professionals. This article describes the implementation of an interprofessional education curriculum for graduate students enrolled in nursing, psychology, and speech-language pathology programs. Over 3 semesters, students engaged in interprofessional collaboration modules, unfolding case studies, virtual simulation, and shared case planning experiences. The curriculum's impact on students' attitudes and values toward interprofessional collaborative practice was measured...
August 16, 2017: Nurse Educator
https://www.readbyqxmd.com/read/28817382/quantum-mechanical-force-fields-for-condensed-phase-molecular-simulations
#3
Timothy J Giese, Darrin M York
Molecular simulations are powerful tools for providing atomic-level details into complex chemical and physical processes that occur in the condensed phase. For strongly interacting systems where quantum many-body effects are known to play an important role, density-functional methods are often used to provide the model with the potential energy used to drive dynamics. These methods, however, suffer from two major drawbacks. First, they are often too computationally intensive to practically apply to large systems over long time scales, limiting their scope of application...
August 17, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28816571/effects-of-flow-changes-on-radiotracer-binding-simultaneous-measurement-of-neuroreceptor-binding-and-cerebral-blood-flow-modulation
#4
Christin Y Sander, Joseph B Mandeville, Hsiao-Ying Wey, Ciprian Catana, Jacob M Hooker, Bruce R Rosen
The potential effects of changes in blood flow on the delivery and washout of radiotracers has been an ongoing question in PET bolus injection studies. This study provides practical insight into this topic by experimentally measuring cerebral blood flow (CBF) and neuroreceptor binding using simultaneous PET/MRI. Hypercapnic challenges (7% CO2) were administered to non-human primates in order to induce controlled increases in CBF, measured with pseudo-continuous arterial spin labeling. Simultaneously, dopamine D2/D3 receptor binding of [(11)C]raclopride or [(18)F]fallypride was monitored with dynamic PET...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28816344/comparison-of-two-finite-element-modeling-solutions-for-biomechanical-simulation-using-a-case-study-of-a-mandibular-bone
#5
Yunfeng Liu, Ying-Ying Fan, Hui-Yue Dong, Jian-Xing Zhang
BACKGROUND: The method used in biomechanical modeling for finite element method (FEM) analysis needs to deliver accurate results. There are currently two solutions used in FEM modeling for biomedical model of human bone from CT images: one is based on a triangular mesh, and the other is based on the parametric surface model and is more popular in practice. MATERIALS AND METHODS: The outline and modeling procedures for the two solutions are compared and analyzed...
August 17, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28815823/ten-years-of-simulation-based-training-in-pediatric-anesthesia-the-inception-evolution-and-dissemination-of-the-managing-emergencies-in-paediatric-anaesthesia-mepa-course
#6
Tobias C Everett, Ralph MacKinnon, David de Beer, Matthew Taylor, Matthew Dylan Bould
2016 marked the 10-year anniversary of the inception of the Managing Emergencies in Paediatric Anaesthesia (MEPA) course. This simulation-based program was originally created to allow trainees in pediatric anesthesia to experience operating room emergencies which although infrequent, would be considered key competencies for any practicing anesthetist with responsibility for providing care to children. Since its original manifestation, the course has evolved in content, scope, and worldwide availability, such that it is now available at over 60 locations on five continents...
August 17, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28815754/pharmacokinetic-interactions-and-dosing-rationale-for-antiepileptic-drugs-in-adults-and-children
#7
S C van Dijkman, W M Rauwé, M Danhof, O Della Pasqua
AIM: Population pharmacokinetic modelling has been widely used across many therapeutic areas to identify sources of variability, which are incorporated into models as covariate factors. Despite numerous publications on pharmacokinetic (PK) drug-drug interactions (DDIs) between antiepileptic drugs (AEDs), such data are not used to support the dose rationale for polytherapy in the treatment of epileptic seizures. Here we assess the impact of DDIs on plasma concentrations and evaluate the need for AED dose adjustment...
August 16, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28815655/a-clinical-trial-design-using-the-concept-of-proportional-time-using-the-generalized-gamma-ratio-distribution
#8
Milind A Phadnis, James B Wetmore, Matthew S Mayo
Traditional methods of sample size and power calculations in clinical trials with a time-to-event end point are based on the logrank test (and its variations), Cox proportional hazards (PH) assumption, or comparison of means of 2 exponential distributions. Of these, sample size calculation based on PH assumption is likely the most common and allows adjusting for the effect of one or more covariates. However, when designing a trial, there are situations when the assumption of PH may not be appropriate. Additionally, when it is known that there is a rapid decline in the survival curve for a control group, such as from previously conducted observational studies, a design based on the PH assumption may confer only a minor statistical improvement for the treatment group that is neither clinically nor practically meaningful...
August 16, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28815609/the-academic-practice-gap-strategies-for-an-enduring-problem
#9
C L Huston, B Phillips, P Jeffries, C Todero, J Rich, P Knecht, S Sommer, M P Lewis
The academic-practice gap in nursing is well documented. Academe is criticized for producing nurses insufficiently prepared to fully participate in patient care. Practice settings are criticized for having unrealistic expectations of new graduates. This article is based on a review of the literature and an exploration of contemporary practices used to bridge academic and practice partnerships. Differences in outcome expectations for new graduates between academe and practice are outlined and consequences of the gap for new graduates, patients, and employers are discussed...
August 16, 2017: Nursing Forum
https://www.readbyqxmd.com/read/28815147/triangulating-methodologies-from-software-medicine-and-human-factors-industries-to-measure-usability-and-clinical-efficacy-of-medication-data-visualization-in-an-electronic-health-record-system
#10
Bora Chang, Manoj Kanagaraj, Ben Neely, Noa Segall, Erich Huang
Within the last decade, use of Electronic Health Record (EHR) systems has become intimately integrated into healthcare practice in the United States. However, large gaps remain in the study of clinical usability and require rigorous and innovative approaches for testing usability principles. In this study, validated tools from the core functions that EHRs serve-software, medicine and human factors-were combined to holistically understand and objectively measure usability of medication data displays. The first phase of this study included 132 medical trainee participants who were randomized to one of two simulated EHR environments with either a medication list or a medication timeline visualization...
2017: AMIA Summits on Translational Science Proceedings
https://www.readbyqxmd.com/read/28814280/assisted-clustering-of-gene-expression-data-using-ancut
#11
Sebastian J Teran Hidalgo, Mengyun Wu, Shuangge Ma
BACKGROUND: In biomedical research, gene expression profiling studies have been extensively conducted. The analysis of gene expression data has led to a deeper understanding of human genetics as well as practically useful models. Clustering analysis has been a critical component of gene expression data analysis and can reveal the (previously unknown) interconnections among genes. With the high dimensionality of gene expression data, many of the existing clustering methods and results are not as satisfactory...
August 16, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28813881/simulation-of-variable-impedance-as-an-intervention-for-upper-extremity-motor-exploration
#12
Felix C Huang
Current methods in robot-assisted therapy are limited in providing predictions of the effectiveness of interventions. Our approach focuses on how robotic interaction can impact the distribution of movements expressed in the arm. Using data from a previous study with stroke survivors (n=10), we performed simulations to examine how changes in hand endpoint impedance would alter exploratory motion. We present methods for designing a custom training intervention, by relating the desired change in acceleration covariance in planar motion with a corresponding change in inertia matrix...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813485/magnetic-lenz-lenses-improve-the-limit-of-detection-in-nuclear-magnetic-resonance
#13
Nils Spengler, Peter T While, Markus V Meissner, Ulrike Wallrabe, Jan G Korvink
A high NMR detection sensitivity is indispensable when dealing with mass and volume-limited samples, or whenever a high spatial resolution is required. The use of miniaturised RF coils is a proven way to increase sensitivity, but situations may arise where space restrictions could prevent the use of a small resonant coil, e.g., in the interior of the smallest practicable micro-coils. We present the use of magnetic lenses, denoted as Lenz lenses due to their working principle, to focus the magnetic flux of an RF coil into a smaller volume and thereby locally enhance the sensitivity of the NMR experiment-at the expense of the total sensitive volume...
2017: PloS One
https://www.readbyqxmd.com/read/28812044/monte-carlo-simulations-of-randomized-clinical-trials-in-epilepsy
#14
Daniel M Goldenholz, Joseph Tharayil, Robert Moss, Evan Myers, William H Theodore
BACKGROUND: The placebo response in epilepsy randomized clinical trials (RCTs) has recently been shown to largely reflect underlying natural variability in seizure frequency. Based on this observation, we sought to explore the parameter space of RCT design to optimize trial efficiency and cost. METHODS: We used one of the world's largest patient reported seizure diary databases, SeizureTracker.com to derive virtual patients for simulated RCTs. We ran 1000 randomly generated simulated trials using bootstrapping (sampling with replacement) for each unique combination of trial parameters, sweeping a large set of parameters in durations of the baseline and test periods, number of patients, eligibility criteria, drug effect size, and patient dropout...
August 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28811996/experimental-method-and-statistical-analysis-to-fit-tumor-growth-model-using-spect-ct-imaging-a-preclinical-study
#15
Ivan Hidrovo, Joyoni Dey, Megan E Chesal, Dmytro Shumilov, Narayan Bhusal, J Michael Mathis
BACKGROUND: Over the last decade, several theoretical tumor-models have been developed to describe tumor growth. Oncology imaging is performed using various modalities including computed tomography (CT), magnetic resonance imaging (MRI), single-photon emission computed tomography (SPECT) and fluorodeoxyglucose-positron emission tomography (FDG-PET). Our goal is to extract useful, otherwise hidden, quantitative biophysical parameters (such as growth-rate, tumor-necrotic-factor, etc.) from these serial images of tumors by fitting mathematical models to images...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28811146/n2o-emissions-from-an-intermittently-aerated-semi-aerobic-aged-refuse-bioreactor-combined-effect-of-cod-and-nh4-n-in-influent-leachate
#16
Weihua Li, Yingjie Sun, Rongxing Bian, Huawei Wang, Dalei Zhang
The carbon-nitrogen ratio (COD/NH4(+)-N) is an important factor affecting nitrification and denitrification in wastewater treatment; this factor also influences nitrous oxide (N2O) emissions. This study investigated two simulated intermittently aerated semi-aerobic aged refuse bioreactors (SAARB) filled with 8-year old aged refuse (AR). The research analyzed how differences in and the combination of influent COD and NH4(+)-N impact N2O emissions in leachate treatment. Experimental results showed that N2O emissions increased as the influent COD/NH4(+)-N decreased...
August 12, 2017: Waste Management
https://www.readbyqxmd.com/read/28811078/mentoring-models-in-neurosurgical-training-review-of-literature
#17
REVIEW
Taiwo Akhigbe, Ardalan Zolnourian, Diederik Bulters
BACKGROUND: Effective mentoring is an invaluable element in the development of next generation of neurosurgeons. A mentor helps to develop professional core values, technical and non-technical skills, attitudes and disposition required to be qualified and competent neurosurgeon. Giving the invaluable significance of mentoring in neurosurgery, we undertook this literature review to identify mentoring models evaluating its success and relative benefit. METHODS: Literature search identified using MeSH word 'mentor', mentoring, mentorship, mentoring model, neurosurgery' in MEDLINE, EMBASE and Scopus databases from 1990 to 2016...
August 12, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28811044/learning-how-to-teach-one-a-needs-assessment-of-the-state-of-faculty-development-within-the-consortium-of-the-american-college-of-surgeons-accredited-education-institutes
#18
John T Paige, Nehal N Khamis, Jeffrey B Cooper
BACKGROUND: Developing faculty competencies in curriculum development, teaching, and assessment using simulation is critical for the success of the Consortium of the American College of Surgeons Accredited Education Institutes program. The state of and needs for faculty development in the Accredited Education Institute community are unknown currently. The Faculty Development Committee of the Consortium of the Accredited Education Institutes conducted a survey of Accredited Education Institutes to ascertain what types of practices are used currently, with what frequency, and what needs are perceived for further programs and courses to guide the plan of action for the Faculty Development Committee...
August 12, 2017: Surgery
https://www.readbyqxmd.com/read/28810683/evaluating-the-physiological-and-perceptual-responses-of-wearing-a-newly-designed-cooling-vest-for-construction-workers
#19
Yijie Zhao, Wen Yi, Albert P C Chan, Francis K W Wong, Michael C H Yam
Construction workers are subjected to heat stress because of the hot environment, physically demanding tasks, and/or personal protective equipment. A tailor-made cooling vest that protects construction workers from heat-related injuries was developed. The purpose of the study is to examine a newly designed cooling vest's effectiveness in alleviating physiological and perceptual strain in a hot and humid environment. Twelve male participants performed two trials, i.e., cooling vest (VEST) and control (CON) in a climatic chamber controlled at 37°C temperature, 60% relative humidity, 0...
August 1, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28810240/efficient-statistical-method-for-association-analysis-of-x-linked-variants
#20
Heejin Jin, Taesung Park, Sungho Won
BACKGROUND/AIMS: Unlike the gene-poor Y chromosome, the X chromosome contains over 1,000 genes that are essential for viability of cells. Females have 2 X chromosomes, and thus female X-linked gene expression would be expected to be twice that of males. To adjust this imbalance, one of the 2 X-linked genes is often inactivated, and this is known as X-chromosome inactivation (XCI). However, recent studies described that a gene can be nonrandomly selected for inactivation from 2 X-linked genes and that XCI is not observed in some X-linked genes...
August 16, 2017: Human Heredity
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