Publications by authors named "Eric Foster"

Article Synopsis
  • This survey paper discusses advanced nonlinear control techniques for Unmanned Aerial Vehicles (UAVs) like quadrotors and the Twin Rotor MIMO system (TRMS).
  • UAVs present unique challenges due to their high nonlinearity and coupling, making them ideal for testing control algorithms.
  • The paper highlights recent developments in nonlinear control strategies, including sensor-driven and adaptive controls, which outperform traditional linear methods and suggests future research directions for improving UAV performance.
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Objective: To determine the cost of achieving a live birth after first transfer using highly purified human menotropin (HP-hMG) or recombinant follicle-stimulating hormone (FSH) for controlled ovarian stimulation in predicted high-responder patients in the Menopur in Gonadotropin-releasing hormone Antagonist Single Embryo Transfer-High Responder (MEGASET-HR) trial.

Design: Cost minimization analysis of trial results.

Setting: Thirty-one fertility centers.

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Allogeneic islet transplant offers a minimally invasive option for β cell replacement in the treatment of type 1 diabetes (T1D). The CIT consortium trial of purified human pancreatic islets (PHPI) in patients with T1D after kidney transplant (CIT06), a National Institutes of Health-sponsored phase 3, prospective, open-label, single-arm pivotal trial of PHPI, was conducted in 24 patients with impaired awareness of hypoglycemia while receiving intensive insulin therapy. PHPI were manufactured using standardized processes.

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Importance: One major advantage of developing large, federally funded networks for clinical research in neurology is the ability to have a trial-ready network that can efficiently conduct scientifically rigorous projects to improve the health of people with neurologic disorders.

Observations: National Institute of Neurological Disorders and Stroke Network for Excellence in Neuroscience Clinical Trials (NeuroNEXT) was established in 2011 and renewed in 2018 with the goal of being an efficient network to test between 5 and 7 promising new agents in phase II clinical trials. A clinical coordinating center, data coordinating center, and 25 sites were competitively chosen.

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Although health care expenditure per capita is higher in the USA than in any other country, more than 37 million Americans do not have health insurance, and 41 million more have inadequate access to care. Efforts are ongoing to repeal the Affordable Care Act which would exacerbate health-care inequities. By contrast, a universal system, such as that proposed in the Medicare for All Act, has the potential to transform the availability and efficiency of American health-care services.

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Objectives: We examined whether a home-based, adaptive cognitive training (CT) program would lead to cognitive performance changes on a neuropsychological test battery in cognitively normal older adults.

Method: Sixty-eight older adults (age = 70.0, SD = 3.

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Article Synopsis
  • Certain dopaminergic medications may have varying effects on mood in early Parkinson's disease (PD) patients, with the study focusing on those who had not yet received treatment.
  • The research involved analyzing data from 405 PD patients over five years and measuring depressive symptoms using the Geriatric Depression Scale (GDS-15) alongside assessments for motor and cognitive factors.
  • Results showed that while one-third of participants had clinically significant depressive symptoms, the medications did not significantly impact mood, although there were interactions observed between cognitive function and specific medications.
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Introduction: Activity-monitoring devices may increase activity, but their effectiveness in sedentary, diseased, and less-motivated populations is unknown.

Methods: Subjects with diabetes or pre-diabetes were given a Fitbit and randomized into three groups: Fitbit only, Fitbit with reminders, and Fitbit with both reminders and goal setting. Subjects in the reminders group were sent text-message reminders to wear their Fitbit.

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Objective: Attaining glycemic targets without severe hypoglycemic events (SHEs) is a challenging treatment goal for patients with type 1 diabetes complicated by impaired awareness of hypoglycemia (IAH). The CIT Consortium Protocol 07 (CIT-07) trial showed islet transplantation to be an effective treatment for subjects with IAH and intractable SHEs. We evaluated health-related quality of life (HRQOL), functional health status, and health utility before and after pancreatic islet transplantation in CIT-07 trial participants.

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Objectives: To assess the neurobiological substrate of initial cognitive decline in Parkinson's disease (PD) to inform patient management, clinical trial design, and development of treatments.

Methods: We longitudinally assessed, up to 3 years, 423 newly diagnosed patients with idiopathic PD, untreated at baseline, from 33 international movement disorder centers. Study outcomes were four determinations of cognitive impairment or decline, and biomarker predictors were baseline dopamine transporter (DAT) single photon emission computed tomography (SPECT) scan, structural magnetic resonance imaging (MRI; volume and thickness), diffusion tensor imaging (mean diffusivity and fractional anisotropy), cerebrospinal fluid (CSF; amyloid beta [Aβ], tau and alpha synuclein), and 11 single nucleotide polymorphisms (SNPs) previously associated with PD cognition.

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This study aimed to identify the utility of diffusion tensor imaging (DTI) in measuring the regional distribution of abnormal microstructural progression in patients with Parkinson's disease who were enrolled in the Parkinson's progression marker initiative (PPMI). One hundred and twenty two de-novo PD patients (age = 60.5±9) and 50 healthy controls (age = 60.

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Haemophilus haemolyticus and nontypeable Haemophilus influenzae (NTHi) are closely related upper airway commensal bacteria that are difficult to distinguish phenotypically. NTHi causes upper and lower airway tract infections in individuals with compromised airways, while H. haemolyticus rarely causes such infections.

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Introduction Cluster randomized trials (CRTs) are now the gold standard in health services research, including pharmacy-based interventions. Studies of behaviour, epidemiology, lifestyle modifications, educational programs, and health care models are utilizing the strengths of cluster randomized analyses. Methodology The key property of CRTs is the unit of randomization (clusters), which may be different from the unit of analysis (individual).

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Background: This study reports the baseline characteristics of diffusion tensor imaging data in Parkinson's disease (PD) patients and healthy control subjects from the Parkinson's Progression Markers Initiative. The main goals were to replicate previous findings of abnormal diffusion imaging values from the substantia nigra. in a large multicenter cohort and determine whether nigral diffusion alterations are associated with dopamine deficits.

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Background: Parkinson's disease (PD) is histopathologically characterized by the loss of dopamine neurons in the substantia nigra pars compacta. The depletion of these neurons is thought to reduce the dopaminergic function of the nigrostriatal pathway, as well as the neural fibers that link the substantia nigra to the striatum (putamen and caudate), causing a dysregulation in striatal activity that ultimately leads to lack of movement control. Based on diffusion tensor imaging, visualizing this pathway and measuring alterations of the fiber integrity remain challenging.

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Article Synopsis
  • To assess hypertension, it is recommended to take multiple blood pressure (BP) measurements, leading to a study with three groups: EMR-only, EMR + reminders, and bi-directional text messaging.
  • In the study involving 121 patients, those in the bi-directional text messaging group successfully recorded their 14 measurements more frequently than both the EMR-only and EMR + reminders groups.
  • Text-message reminders alone improved BP reporting compared to just using an EMR, indicating that both bi-directional messaging and reminders are effective methods for collecting BP data from patients.
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Article Synopsis
  • The study aimed to assess the prevalence and factors related to cognitive impairment (CI) and neuropsychiatric symptoms (NPS) in early-stage, untreated Parkinson's disease (PD) patients.
  • The research involved a multi-site study comparing 423 PD patients to 196 healthy controls, focusing on cognitive testing and symptoms like depression and anxiety.
  • Results indicated that 22% of PD patients showed signs of CI, though only 9% met criteria for mild cognitive impairment, along with significantly higher rates of depression, anxiety, and apathy compared to healthy controls.
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Nontypeable Haemophilus influenzae (NTHI) forms biofilms in the middle ear during human infection. The biofilm matrix of NTHI contains extracellular DNA. We show that NTHI possesses a potent nuclease, which is a homolog of the thermonuclease of Staphylococcus aureus.

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Background: Data from surveillance networks help epidemiologists and public health officials detect emerging diseases, conduct outbreak investigations, manage epidemics, and better understand the mechanics of a particular disease. Surveillance networks are used to determine outbreak intensity (i.e.

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Background And Objective: Although influenza has been associated with asthma exacerbations, it is not clear the extent to which this association affects health care use in the United States. The first goal of this project was to determine whether, and to what extent, the incidence of asthma hospitalizations is associated with seasonal variation in influenza. Second, we used influenza trends (2000-2008) to help predict asthma admissions during the 2009 H1N1 influenza pandemic.

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Although influenza has been associated with chronic obstructive pulmonary disease (COPD) exacerbations, it is not clear the extent to which this association affects healthcare use in the United States. The first goal of this project was to determine to what extent the incidence of COPD hospitalizations is associated with seasonal influenza. Second, as a natural experiment, we used influenza activity to help predict COPD admissions during the 2009 H1N1 influenza pandemic.

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Article Synopsis
  • The study investigates how certain genes in nontypeable Haemophilus influenzae (NTHi) change their expression (phase variation) during a 6-day colonization of the human nasopharynx.
  • Thirteen phase-variable genes were examined, with significant phase variation observed in the licA and igaB genes during the observation period, indicating their importance in colonization.
  • While the lex2A gene displayed some variability, it was not statistically significant; overall, the findings suggest that specific genotypes are crucial for the initial stages of colonization in humans.
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Article Synopsis
  • A study compared automated recordings and human observations of hand-hygiene events involving nearly 1,400 cases.
  • There was a 38% discrepancy in details noted by the two methods.
  • The differences were likely caused by factors such as the observer's distance from the event and the clinic's level of activity.
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Diverse stresses including starvation and muscle disuse cause skeletal muscle atrophy. However, the molecular mechanisms of muscle atrophy are complex and not well understood. Here, we demonstrate that growth arrest and DNA damage-inducible 45a protein (Gadd45a) is a critical mediator of muscle atrophy.

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This article describes an MR-safe treadmill that enables cardiovascular exercise stress testing adjacent to the MRI system, facilitating cardiac MR imaging immediately following exercise stress. The treadmill was constructed of nonferromagnetic components utilizing a hydraulic power system. Computer control ensured precise execution of the standard Bruce treadmill protocol commonly used for cardiovascular exercise stress testing.

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