keyword
MENU ▼
Read by QxMD icon Read
search

feedback control

keyword
https://www.readbyqxmd.com/read/28445796/decreasing-the-use-of-damage-control-laparotomy-in-trauma-a-quality-improvement-project
#1
John A Harvin, Lillian S Kao, Mike K Liang, Sasha D Adams, Michelle K McNutt, Joseph D Love, Laura J Moore, Charles E Wade, Bryan A Cotton, John B Holcomb
BACKGROUND: Our institution has published damage control laparotomy (DCL) rates of 30% and documented the substantial morbidity associated with the open abdomen. The purpose of this quality improvement (QI) project was to decrease the rate of DCL at a busy, Level 1 trauma center in the United States. STUDY DESIGN: A prospective cohort of all emergent trauma laparotomies from 11/2013-10/2015 (QI group) were followed. The QI intervention was multi-faceted and included audit and feedback for every DCL case...
April 23, 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28445735/a-design-principle-for-an-autonomous-post-translational-pattern-formation
#2
Shuhei S Sugai, Koji L Ode, Hiroki R Ueda
Previous autonomous pattern-formation models often assumed complex molecular and cellular networks. This theoretical study, however, shows that a system composed of one substrate with multisite phosphorylation and a pair of kinase and phosphatase can generate autonomous spatial information, including complex stripe patterns. All (de-)phosphorylation reactions are described with a generic Michaelis-Menten scheme, and all species freely diffuse without pre-existing gradients. Computational simulation upon >23,000,000 randomly generated parameter sets revealed the design motifs of cyclic reaction and enzyme sequestration by slow-diffusing substrates...
April 25, 2017: Cell Reports
https://www.readbyqxmd.com/read/28445694/work-first-then-play-prior-task-difficulty-increases-motivation-related-brain-responses-in-a-risk-game
#3
Barbara Schmidt, Patrick Mussel, Roman Osinsky, Björn Rasch, Stefan Debener, Johannes Hewig
Task motivation depends on what we did before. A recent theory differentiates between tasks that we want to do and tasks that we have to do. After a have-to task, motivation shifts towards a want-to task. We measured this shift of motivation via brain responses to monetary feedback in a risk game that was used as want-to task in our study. We tested 20 healthy participants that were about 28 years old in a within-subjects design. Participants worked on a Stroop task (have-to task) or an easier version of the Stroop task as a control condition and played a risk game afterwards (want-to task)...
April 23, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28445691/tis11-mediated-mrna-decay-promotes-the-reacquisition-of-drosophila-intestinal-stem-cell-quiescence
#4
Lindy McClelland, Heinrich Jasper, Benoît Biteau
Adult stem cell proliferation rates are precisely regulated to maintain long-term tissue homeostasis. Defects in the mechanisms controlling stem cell proliferation result in impaired regeneration and hyperproliferative diseases. Many stem cell populations increase proliferation in response to tissue damage and reacquire basal proliferation rates after tissue repair is completed. Although proliferative signals have been extensively studied, much less is known about the molecular mechanisms that restore stem cell quiescence...
April 23, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28445323/examination-of-the-relationship-between-management-and-clinician-perception-of-patient-safety-climate-and-patient-satisfaction
#5
Olena Mazurenko, Jason Richter, Abby Swanson Kazley, Eric Ford
PURPOSE: The aim of this study was to explore the relationship between managers and clinicians' agreement on deeming the patient safety climate as high or low and the patients' satisfaction with those organizations. DATA SOURCES/STUDY SETTING: We used two secondary data sets: the Hospital Survey on Patient Safety Culture (2012) and the Hospital Consumer Assessment of Healthcare Providers and Systems (2012). METHODOLOGY/APPROACH: We used ordinary least squares regressions to analyze the relationship between the extent of agreement between managers and clinicians' perceptions of safety climate in relationship to patient satisfaction...
April 25, 2017: Health Care Management Review
https://www.readbyqxmd.com/read/28443636/rich-complex-behaviour-of-self-assembled-nanoparticles-far-from-equilibrium
#6
Serim Ilday, Ghaith Makey, Gursoy B Akguc, Özgün Yavuz, Onur Tokel, Ihor Pavlov, Oguz Gülseren, F Ömer Ilday
A profoundly fundamental question at the interface between physics and biology remains open: what are the minimum requirements for emergence of complex behaviour from nonliving systems? Here, we address this question and report complex behaviour of tens to thousands of colloidal nanoparticles in a system designed to be as plain as possible: the system is driven far from equilibrium by ultrafast laser pulses that create spatiotemporal temperature gradients, inducing Marangoni flow that drags particles towards aggregation; strong Brownian motion, used as source of fluctuations, opposes aggregation...
April 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28443619/programming-mrna-decay-to-modulate-synthetic-circuit-resource-allocation
#7
Ophelia S Venturelli, Mika Tei, Stefan Bauer, Leanne Jade G Chan, Christopher J Petzold, Adam P Arkin
Synthetic circuits embedded in host cells compete with cellular processes for limited intracellular resources. Here we show how funnelling of cellular resources, after global transcriptome degradation by the sequence-dependent endoribonuclease MazF, to a synthetic circuit can increase production. Target genes are protected from MazF activity by recoding the gene sequence to eliminate recognition sites, while preserving the amino acid sequence. The expression of a protected fluorescent reporter and flux of a high-value metabolite are significantly enhanced using this genome-scale control strategy...
April 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28443327/acidity-triggered-tumor-retention-internalization-of-chimeric-peptide-for-enhanced-photodynamic-therapy-and-real-time-monitoring-of-therapeutic-effects
#8
Kai Han, Wei-Yun Zhang, Zhao-Yu Ma, Shi-Bo Wang, Lu-Ming Xu, Jia Liu, Xianzheng Zhang, Heyou Han
Photodynamic therapy (PDT) holds great promise in tumor treatment. Nevertheless, it remains highly desirable to develop easy-to-fabricated PDT systems with improved tumor accumulation/internalization and timely therapeutic feedback. Here, we report a tumor acidity responsive chimeric peptide for enhanced PDT and noninvasively real-time apoptosis imaging. Both in vitro and in vivo studies revealed that tumor mildly acidic microenvironment could trigger rapid protonation of carboxylate anion in chimeric peptide, which led to increased zeta potential, improved hydrophobicity, controlled size enlargement and precise morphology switch from sphere to spherocylinder shape of chimeric peptide...
April 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28442450/implementing-an-internet-delivered-skin-cancer-genetic-testing-intervention-to-improve-sun-protection-behavior-in-a-diverse-population-protocol-for-a-randomized-controlled-trial
#9
Jennifer L Hay, Marianne Berwick, Kate Zielaskowski, Kirsten Am White, Vivian M Rodríguez, Erika Robers, Dolores D Guest, Andrew Sussman, Yvonne Talamantes, Matthew R Schwartz, Jennie Greb, Jessica Bigney, Kimberly A Kaphingst, Keith Hunley, David B Buller
BACKGROUND: Limited translational genomic research currently exists to guide the availability, comprehension, and appropriate use of personalized genomics in diverse general population subgroups. Melanoma skin cancers are preventable, curable, common in the general population, and disproportionately increasing in Hispanics. OBJECTIVE: Variants in the melanocortin-1 receptor (MC1R) gene are present in approximately 50% of the population, are major factors in determining sun sensitivity, and confer a 2-to-3-fold increase in melanoma risk in the general population, even in populations with darker skin...
April 25, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28442359/emg-biofeedback-training-in-adult-attention-deficit-hyperactivity-disorder-an-active-control-training
#10
Beatrix Barth, Kerstin Mayer, Ute Strehl, Andreas J Fallgatter, Ann-Christine Ehlis
OBJECTIVE: The present study aimed at revealing neurophysiological effects induced by electromyography (EMG) based biofeedback, considered as a semi-active control condition in neurofeedback studies, in adult attention-deficit/hyperactivity disorder (ADHD) patients. METHODS: 20 adult ADHD patients trained their muscle activity in the left and right supraspinatus muscle over the course of 30 EMG biofeedback sessions. Changes induced by the EMG feedback were evaluated at a clinical and neurophysiological level; additionally, the relation between changes in EEG activity recorded at the vertex over the training course and changes of symptom severity over the treatment course were assessed in order to investigate the mechanisms underlying clinical effects of EMG biofeedback...
April 22, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28440582/phytochrome-interacting-factors-mediate-metabolic-control-of-the-circadian-system-in-arabidopsis
#11
Ekaterina Shor, Inyup Paik, Shlomit Kangisser, Rachel Green, Enamul Huq
The circadian (c. 24 h) system has a central role in regulating the timing and coordination of photosynthesis, and in turn photosynthesis and photosynthetic products which are controlled by the circadian clock feedback to affect the circadian oscillator that generates rhythms. However, little is known about the mechanism(s) by which this feedback occurs. One group of likely candidates for signal transduction to the circadian clock are the PHYTOCHROME INTERACTING FACTOR (PIF) family of transcription factors which have been shown to be involved in numerous signaling pathways in Arabidopsis...
April 25, 2017: New Phytologist
https://www.readbyqxmd.com/read/28440016/outcomes-and-feasibility-of-the-short-transitional-intervention-in-psychiatry-in-improving-the-transition-from-inpatient-treatment-to-the-community-a-pilot-study
#12
Anna Hegedüs, Bernd Kozel, Niklaus Fankhauser, Ian Needham, Johann Behrens
Discharge from psychiatric inpatient care is frequently described as chaotic, stressful, and emotionally charged. Following discharge, service users are vulnerable to becoming overwhelmed by the challenges involved in readapting to their home environments, which could result in serious problems and lead to readmission. The short transitional intervention in psychiatry (STeP) is a bridging intervention that includes pre- and post-discharge sections. It aims to prepare patients for specific situations in the period immediately following discharge from a psychiatric hospital...
April 25, 2017: International Journal of Mental Health Nursing
https://www.readbyqxmd.com/read/28440010/self-concept-mediates-the-relation-between-achievement-and-emotions-in-mathematics
#13
Jojanneke P J Van der Beek, Sanne H G Van der Ven, Evelyn H Kroesbergen, Paul P M Leseman
BACKGROUND: Mathematics achievement is related to positive and negative emotions. Pekrun's control-value theory of achievement emotions suggests that students' self-concept (i.e., self-appraisal of ability) may be an important mediator of the relation between mathematics achievement and emotions. AIMS: The aims were (1) to investigate the mediating role of mathematical self-concept in the relation between mathematics achievement and the achievement emotions of enjoyment and anxiety in a comprehensive model, and (2) to test possible differences in this mediating role between low-, average-, and high-achieving students...
April 25, 2017: British Journal of Educational Psychology
https://www.readbyqxmd.com/read/28439352/preoperative-practice-paired-with-instructor-feedback-may-not-improve-obstetrics-gynecology-residents-operative-performance
#14
Jamie Kroft, Michael Ordon, Leslie Po, Nora Zwingerman, Katie Waters, Jason Y Lee, Richard Pittini
BACKGROUND: There is evidence that preoperative practice prior to surgery can improve trainee performance, but the optimal approach has not been studied. OBJECTIVE: We sought to determine if preoperative practice by surgical trainees paired with instructor feedback improved surgical technique, compared to preoperative practice or feedback alone. METHODS: We conducted a randomized controlled trial of obstetrics-gynecology trainees, stratified on a simulator-assessed surgical skill...
April 2017: Journal of Graduate Medical Education
https://www.readbyqxmd.com/read/28439230/from-anxious-to-reckless-a-control-systems-approach-unifies-prefrontal-limbic-regulation-across-the-spectrum-of-threat-detection
#15
REVIEW
Lilianne R Mujica-Parodi, Jiook Cha, Jonathan Gao
Here we provide an integrative review of basic control circuits, and introduce techniques by which their regulation can be quantitatively measured using human neuroimaging. We illustrate the utility of the control systems approach using four human neuroimaging threat detection studies (N = 226), to which we applied circuit-wide analyses in order to identify the key mechanism underlying individual variation. In so doing, we build upon the canonical prefrontal-limbic control system to integrate circuit-wide influence from the inferior frontal gyrus (IFG)...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28438917/disease-ecology-health-and-the-environment-a-framework-to-account-for-ecological-and-socio-economic-drivers-in-the-control-of-neglected-tropical-diseases
#16
A Garchitorena, S H Sokolow, B Roche, C N Ngonghala, M Jocque, A Lund, M Barry, E A Mordecai, G C Daily, J H Jones, J R Andrews, E Bendavid, S P Luby, A D LaBeaud, K Seetah, J F Guégan, M H Bonds, G A De Leo
Reducing the burden of neglected tropical diseases (NTDs) is one of the key strategic targets advanced by the Sustainable Development Goals. Despite the unprecedented effort deployed for NTD elimination in the past decade, their control, mainly through drug administration, remains particularly challenging: persistent poverty and repeated exposure to pathogens embedded in the environment limit the efficacy of strategies focused exclusively on human treatment or medical care. Here, we present a simple modelling framework to illustrate the relative role of ecological and socio-economic drivers of environmentally transmitted parasites and pathogens...
June 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28438728/designing-patient-centered-text-messaging-interventions-for-increasing-physical-activity-among-participants-with-type-2-diabetes-qualitative-results-from-the-text-to-move-intervention
#17
Gabrielle N Horner, Stephen Agboola, Kamal Jethwani, Aswita Tan-McGrory, Lenny Lopez
BACKGROUND: Type 2 diabetes mellitus (T2DM) is a disease affecting approximately 29.1 million people in the United States, and an additional 86 million adults have prediabetes. Diabetes self-management education, a complex health intervention composed of 7 behaviors, is effective at improving self-care behaviors and glycemic control. Studies have employed text messages for education, reminders, and motivational messaging that can serve as "cues to action," aiming to improve glucose monitoring, self-care behaviors, appointment attendance, and medication adherence...
April 24, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28437622/sexually-active-bucks-counterbalance-the-seasonal-negative-feedback-of-estradiol-on-lh-in-ovariectomized-goats
#18
A L Muñoz, D Chesneau, H Hernández, M Bedos, G Duarte, J Vielma, L A Zarazaga, P Chemineau, M Keller, J A Delgadillo
We showed previously that the permanent presence of bucks rendered sexually active by photoperiodic treatments, thereafter called photostimulated bucks, prevents the occurrence of seasonal anovulation; also, the introduction of these sexually active bucks induces ovulations during seasonal anestrus. Here, we studied the response of ovariectomized goats bearing 12-mm subcutaneous implants filled or not with estradiol to sexually active males to determine (1) whether the permanent presence of such bucks prevents the decrease of LH despite the presence of a negative feedback by estradiol mimicking that of seasonal anestrus (experiment 1) and (2) whether the introduction of photostimulated bucks increases the plasma LH concentrations in spite of this negative feedback (experiment 2)...
March 31, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28436911/sampled-data-fuzzy-control-for-nonlinear-coupled-parabolic-pde-ode-systems
#19
Zi-Peng Wang, Huai-Ning Wu, Han-Xiong Li
In this paper, a sampled-data fuzzy control problem is addressed for a class of nonlinear coupled systems, which are described by a parabolic partial differential equation (PDE) and an ordinary differential equation (ODE). Initially, the nonlinear coupled system is accurately represented by the Takagi-Sugeno (T-S) fuzzy coupled parabolic PDE-ODE model. Then, based on the T-S fuzzy model, a novel time-dependent Lyapunov functional is used to design a sampled-data fuzzy controller such that the closed-loop coupled system is exponentially stable, where the sampled-data fuzzy controller consists of the ODE state feedback and the PDE static output feedback under spatially averaged measurements...
April 17, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28436890/in-situ-force-augmentation-improves-surface-contact-and-force-control
#20
Randy Lee, Roberta Klatzky, George Stetten
Surgeons routinely perform surgery with noisy, sub-threshold, or obscured visual and haptic feedback, either due to the necessary surgical approach, or because the systems on which they are operating are exceedingly delicate. Technological solutions incorporating haptic feedback augmentation have been proposed to address these difficulties, but the consequences for motor control have not been directly investigated and quantified. In this paper, we present two isometric force generation tasks performed with a hand-held robotic tool that provides in-situ augmentation of force sensation...
April 24, 2017: IEEE Transactions on Haptics
keyword
keyword
88990
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"