keyword
MENU ▼
Read by QxMD icon Read
search

david ludwig

keyword
https://www.readbyqxmd.com/read/28764526/high-throughput-heterodyne-thermoreflectance-application-to-thermal-conductivity-measurements-of-a-fe-si-ge-thin-film-alloy-library
#1
Quentin d'Acremont, Gilles Pernot, Jean-Michel Rampnoux, Andrej Furlan, David Lacroix, Alfred Ludwig, Stefan Dilhaire
A High-Throughput Time-Domain ThermoReflectance (HT-TDTR) technique was developed to perform fast thermal conductivity measurements with minimum user actions required. This new setup is based on a heterodyne picosecond thermoreflectance system. The use of two different laser oscillators has been proven to reduce the acquisition time by two orders of magnitude and avoid the experimental artefacts usually induced by moving the elements present in TDTR systems. An amplitude modulation associated to a lock-in detection scheme is included to maintain a high sensitivity to thermal properties...
July 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28761328/training-time-and-quality-of-smartphone-based-anterior-segment-screening-in-rural-india
#2
Cassie A Ludwig, Megan R Newsom, Alexandre Jais, David J Myung, Somasheila I Murthy, Robert T Chang
OBJECTIVE: We aimed at evaluating the ability of individuals without ophthalmologic training to quickly capture high-quality images of the cornea by using a smartphone and low-cost anterior segment imaging adapter (the "EyeGo" prototype). METHODS: Seven volunteers photographed 1,502 anterior segments from 751 high school students in Varni, India, by using an iPhone 5S with an attached EyeGo adapter. Primary outcome measures were median photograph quality of the cornea and anterior segment of the eye (validated Fundus Photography vs Ophthalmoscopy Trial Outcomes in the Emergency Department [FOTO-ED] study; 1-5 scale; 5, best) and the time required to take each photograph...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28730465/time-varying-decision-boundaries-insights-from-optimality-analysis
#3
Gaurav Malhotra, David S Leslie, Casimir J H Ludwig, Rafal Bogacz
The most widely used account of decision-making proposes that people choose between alternatives by accumulating evidence in favor of each alternative until this evidence reaches a decision boundary. It is frequently assumed that this decision boundary stays constant during a decision, depending on the evidence collected but not on time. Recent experimental and theoretical work has challenged this assumption, showing that constant decision boundaries are, in some circumstances, sub-optimal. We introduce a theoretical model that facilitates identification of the optimal decision boundaries under a wide range of conditions...
July 20, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28721105/prediction-of-efficacy-for-conversion-from-adjunctive-therapy-to-monotherapy-with-eslicarbazepine-acetate-800-mg-once-daily-for-partial-onset-epilepsy
#4
Soujanya Sunkaraneni, Julie A Passarell, Elizabeth A Ludwig, Jill Fiedler-Kelly, Janet K Pitner, Todd A Grinnell, David Blum
PURPOSE: Eslicarbazepine acetate (ESL) is a once-daily (QD) oral antiepileptic drug (AED) indicated for partial-onset seizures (POS). Clinical studies of gradual conversion to ESL 1,200 and 1,600 mg QD monotherapies were previously conducted in patients with POS who were not well-controlled by 1 or 2 AEDs. This report describes modeling and simulation of plasma eslicarbazepine (primary active metabolite of ESL) concentrations and time to monotherapy study exit to predict efficacy for conversion to ESL monotherapy at a lower dose of 800 mg, as an option for patients requiring or not tolerating higher doses since this regimen is effective in adjunctive therapy for POS...
2017: Clinical Pharmacology: Advances and Applications
https://www.readbyqxmd.com/read/28694840/hepatic-adipocyte-enteric-and-pancreatic-hormones-response-to-dietary-macronutrient-composition-and-relationship-with-metabolism
#5
Bridget M Hron, Cara B Ebbeling, Henry A Feldman, David S Ludwig
BACKGROUND: We sought to characterize the effects of dietary macronutrient composition on various hormones implicated in the regulation of insulin sensitivity (IS) and energy expenditure (EE). METHODS: Following 10-15% weight loss, 21 overweight subjects consumed 3 weight-loss maintenance diets [low fat (LF), low glycemic index (LGI) and very low carbohydrate (VLC)] in random order, each for 4 weeks. At baseline and at the end of each treatment period, fasting samples for fibroblast growth factor (FGF)-21, heme-oxygenase-1 (HO-1), chemerin, irisin, secreted frizzle-related protein (SFRP-4), total bile acids, ghrelin, gastrin inhibitory peptide (GIP), peptide-Y, and amylin; hepatic and peripheral IS; and EE were obtained...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28684310/selective-inhibition-of-plasma-membrane-calcium-atpase-4-improves-angiogenesis-and-vascular-reperfusion
#6
Sathishkumar Kurusamy, Dolores López-Maderuelo, Robert Little, David Cadagan, Aaron M Savage, Jude C Ihugba, Rhiannon R Baggott, Farjana B Rowther, Sara Martínez-Martínez, Pablo Gómez-Del Arco, Clare Murcott, Weiguang Wang, J Francisco Nistal, Delvac Oceandy, Ludwig Neyses, Robert N Wilkinson, Elizabeth J Cartwright, Juan Miguel Redondo, Angel Luis Armesilla
AIMS: Ischaemic cardiovascular disease is a major cause of morbidity and mortality worldwide. Despite promising results from pre-clinical animal models, VEGF-based strategies for therapeutic angiogenesis have yet to achieve successful reperfusion of ischaemic tissues in patients. Failure to restore efficient VEGF activity in the ischaemic organ remains a major problem in current pro-angiogenic therapeutic approaches. Plasma membrane calcium ATPase 4 (PMCA4) negatively regulates VEGF-activated angiogenesis via inhibition of the calcineurin/NFAT signalling pathway...
July 3, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28658271/regulatory-t-cell-frequencies-and-phenotypes-following-anti-viral-vaccination
#7
A Charlotte M T de Wolf, Susan van Aalst, Irene S Ludwig, Caroline L Bodinham, David J Lewis, Ruurd van der Zee, Willem van Eden, Femke Broere
Regulatory T cells (Treg) function in the prevention of excessive inflammation and maintenance of immunological homeostasis. However, these cells may also interfere with resolution of infections or with immune reactions following vaccination. Effects of Treg on vaccine responses are nowadays investigated, but the impact of vaccination on Treg homeostasis is still largely unknown. This may be a relevant safety aspect, since loss of tolerance through reduced Treg may trigger autoimmunity. In exploratory clinical trials, healthy adults were vaccinated with an influenza subunit vaccine plus or minus the adjuvant MF59®, an adjuvanted hepatitis B subunit vaccine or a live attenuated yellow fever vaccine...
2017: PloS One
https://www.readbyqxmd.com/read/28628599/combat-casualty-care-research-for-the-multidomain-battlefield
#8
Todd E Rasmussen, David G Baer, Kyle N Remick, George V Ludwig
No abstract text is available yet for this article.
July 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28615220/confounding-in-ex-vivo-models-of-diamond-blackfan-anemia
#9
Jacob C Ulirsch, Caleb Lareau, Leif S Ludwig, Narla Mohandas, David G Nathan, Vijay G Sankaran
No abstract text is available yet for this article.
June 14, 2017: Blood
https://www.readbyqxmd.com/read/28534669/reply-to-lipworth-and-jabbal-and-to-singh-and-vestbo
#10
David A Lipson, Helen Barnacle, Ruby Birk, Noushin Brealey, Nicholas Locantore, David A Lomas, Andrea Ludwig-Sengpiel, Rajat Mohindra, Maggie Tabberer, Chang-Qing Zhu, Steven J Pascoe
No abstract text is available yet for this article.
May 23, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28512753/serum-neurofilament-light-a-biomarker-of-neuronal-damage-in-multiple-sclerosis
#11
COMPARATIVE STUDY
Giulio Disanto, Christian Barro, Pascal Benkert, Yvonne Naegelin, Sabine Schädelin, Antonella Giardiello, Chiara Zecca, Kaj Blennow, Henrik Zetterberg, David Leppert, Ludwig Kappos, Claudio Gobbi, Jens Kuhle
OBJECTIVE: Neurofilament light chains (NfL) are unique to neuronal cells, are shed to the cerebrospinal fluid (CSF), and are detectable at low concentrations in peripheral blood. Various diseases causing neuronal damage have resulted in elevated CSF concentrations. We explored the value of an ultrasensitive single-molecule array (Simoa) serum NfL (sNfL) assay in multiple sclerosis (MS). METHODS: sNfL levels were measured in healthy controls (HC, n = 254) and two independent MS cohorts: (1) cross-sectional with paired serum and CSF samples (n = 142), and (2) longitudinal with repeated serum sampling (n = 246, median follow-up = 3...
June 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28406682/overcoming-indecision-by-changing-the-decision-boundary
#12
Gaurav Malhotra, David S Leslie, Casimir J H Ludwig, Rafal Bogacz
The dominant theoretical framework for decision making asserts that people make decisions by integrating noisy evidence to a threshold. It has recently been shown that in many ecologically realistic situations, decreasing the decision boundary maximizes the reward available from decisions. However, empirical support for decreasing boundaries in humans is scant. To investigate this problem, we used an ideal observer model to identify the conditions under which participants should change their decision boundaries with time to maximize reward rate...
June 2017: Journal of Experimental Psychology. General
https://www.readbyqxmd.com/read/28384123/magnetic-resonance-imaging-with-hyperpolarized-agents-methods-and-applications
#13
Erin B Adamson, Kai D Ludwig, David G Mummy, Sean B Fain
In the past decade, hyperpolarized (HP) contrast agents have been under active development for MRI applications to address the twin challenges of functional and quantitative imaging. Both HP helium ((3)He) and xenon ((129)Xe) gases have reached the stage where they are under study in clinical research. HP (129)Xe, in particular, is poised for larger scale clinical research to investigate asthma, chronic obstructive pulmonary disease, and fibrotic lung diseases. With advances in polarizer technology and unique capabilities for imaging of (129)Xe gas exchange into lung tissue and blood, HP (129)Xe MRI is attracting new attention...
July 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28376019/combat-casualty-care-research-for-the-multi-domain-battlefield
#14
Todd E Rasmussen, David G Baer, Kyle N Remick, George V Ludwig
No abstract text is available yet for this article.
April 4, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28375647/fulfil-trial-once-daily-triple-therapy-in-patients-with-chronic-obstructive-pulmonary-disease
#15
David A Lipson, Helen Barnacle, Ruby Birk, Noushin Brealey, Nicholas Locantore, David A Lomas, Andrea Ludwig-Sengpiel, Rajat Mohindra, Maggie Tabberer, Chang-Qing Zhu, Steven J Pascoe
RATIONALE: Randomized data comparing triple therapy with dual inhaled corticosteroid (ICS)/long-acting β2-agonist (LABA) therapy in patients with chronic obstructive pulmonary disease (COPD) are limited. OBJECTIVES: We compared the effects of once-daily triple therapy on lung function and health-related quality of life with twice-daily ICS/LABA therapy. METHODS: FULFIL was a randomized, double-blind, double-dummy study comparing 24 weeks of once-daily triple therapy (fluticasone furoate/umeclidinium/vilanterol 100 μg/62...
April 4, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28302395/social-cognition-psychometric-evaluation-scope-in-people-with-early-psychosis-a-preliminary-study
#16
Kelsey A Ludwig, Amy E Pinkham, Philip D Harvey, Skylar Kelsven, David L Penn
Social cognition is an important outcome in schizophrenia research. Unfortunately, there has been a lack of consensus regarding which measures of social cognition best capture this domain of functioning. The Social Cognition Psychometric Evaluation (SCOPE) study was developed to address the need for a battery of measures that have sound psychometric properties and can be implemented in clinical trials for individuals with chronic schizophrenia. The current study expands upon the SCOPE study by examining the psychometric properties of the eight candidate measures administered to individuals early in the course of psychosis...
March 14, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28296229/phytosterol-mediated-inhibition-of-intestinal-cholesterol-absorption-in-mice-is-independent-of-liver-x-receptor
#17
Lídia Cedó, David Santos, Iziar A Ludwig, Reija Silvennoinen, Annabel García-León, Leena Kaipiainen, José M Carbó, Annabel F Valledor, Helena Gylling, Maria-José Motilva, Petri T Kovanen, Miriam Lee-Rueckert, Francisco Blanco-Vaca, Joan Carles Escolà-Gil
SCOPE: Previous studies have proposed that phytosterols activate liver X receptors (LXR) in the intestine, thereby reducing intestinal cholesterol absorption and promoting fecal cholesterol excretion. METHODS AND RESULTS: In the present study, we examined the effects of dietary phytosterol supplementation on intestinal cholesterol absorption and fecal neutral sterol excretion in LXRαβ-deficient mice, and wild-type mice treated with synthetic high-affinity LXRαβ agonists...
March 15, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28273214/integrated-predictive-model-for-prostatic-cancer-using-clinical-laboratory-and-ultrasound-data
#18
Gustavo David Ludwig, Henrique Peres Rocha, Lúcio José Botelho, Maiara Brusco Freitas
OBJECTIVE: to develop a predictive model to estimate the probability of prostate cancer prior to biopsy. METHODS: from September 2009 to January 2014, 445 men underwent prostate biopsy in a radiology service. We excluded from the study patients with diseases that could compromise the data analysis, who had undergone prostatic resection or used 5-alpha-reductase inhibitors. Thus, we selected 412 patients. Variables included in the model were age, prostate specific antigen (PSA), digital rectal examination, prostate volume and abnormal sonographic findings...
December 2016: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/28264082/effects-of-advice-to-drink-8-cups-of-water-per-day-in-adolescents-with-overweight-or-obesity-a-randomized-clinical-trial
#19
RANDOMIZED CONTROLLED TRIAL
Julia M W Wong, Cara B Ebbeling, Lisa Robinson, Henry A Feldman, David S Ludwig
Importance: Health care professionals commonly recommend increased water consumption, typically to 8 cups per day, as part of a weight-reducing diet. However, this recommendation is based on limited evidence and virtually no experimental data from the pediatric population. Objective: To compare 2 standardized weight-loss diets among adolescents with overweight or obesity, either with or without additional advice and behavioral support to increase habitual water intake to 8 cups per day...
May 1, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28237634/geographic-information-systems-to-assess-external-validity-in-randomized-trials
#20
Margaret R Savoca, David A Ludwig, Stedman T Jones, K Jason Clodfelter, Joseph B Sloop, Linda Y Bollhalter, Alain G Bertoni
INTRODUCTION: To support claims that RCTs can reduce health disparities (i.e., are translational), it is imperative that methodologies exist to evaluate the tenability of external validity in RCTs when probabilistic sampling of participants is not employed. Typically, attempts at establishing post hoc external validity are limited to a few comparisons across convenience variables, which must be available in both sample and population. A Type 2 diabetes RCT was used as an example of a method that uses a geographic information system to assess external validity in the absence of a priori probabilistic community-wide diabetes risk sampling strategy...
February 22, 2017: American Journal of Preventive Medicine
keyword
keyword
88411
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"