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PubMed Journals Articles About "NASA Extends Aircraft Maintenance Contract" RSS

14:51 EDT 23rd July 2017 | BioPortfolio

NASA Extends Aircraft Maintenance Contract PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest NASA Extends Aircraft Maintenance Contract articles that have been published worldwide.

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Showing "NASA Extends Aircraft Maintenance Contract" PubMed Articles 1–25 of 2,300+

Maintenance of Certification and the Challenge of Professionalism.

Board certification has been part of the social contract in which physicians commit to maintaining up-to-date scientific knowledge and improving the quality of patient care. However, the maintenance of certification program has been controversial. This review summarizes the philosophical underpinnings, published literature, recent improvements, and future directions of the American Board of Pediatrics maintenance of certification program.


It Is Time to Cancel Medicine's Social Contract Metaphor.

There is agreement that the complex relationship between medicine and society is best described as a metaphorical social contract and that professionalism is the medical profession's contribution to this contract. Metaphors can help clarify abstract concepts, but they can also be abused if the counterfactual attributes of a metaphor become attributed to its subject. This seems to be happening with medical professionalism, which has sometimes been reduced to a contracted deliverable and a bargaining chip. Th...

Assessment of the Bacterial Diversity of Aircraft Water: Identification of the Frequent Fliers.

The aim of this study was to determine and identify bacteria inhabiting the supply chain of an airline's drinking water using phenotypic and 16S rDNA sequence-based analysis. Water samples (n = 184) were sourced from long-haul and short-haul aircraft, the airline water source and a water service vehicle. In total, 308 isolates were characterised and their identity determined, which produced 82 identified bacterial species belonging to eight classes: γ-Proteobacteria; β-Proteobacteria; α-Proteobacteria; B...


Testing the associations between different aspects of seafarers' employment contract and on-board internet access and their job and life satisfaction and health.

The aim of this study was to test for associations between different aspects of contract and on-board internet access and seafarers' satisfaction and health. Altogether 298 Croatian seafarers, all officers, employed on cargo ships, with a minimum work experience of two years with their current shipping company, participated in an online survey. The questionnaire included sociodemographic items, questions relating to their employment contract and internet access, and measures of job satisfaction, life satisf...

Congestion Pricing for Aircraft Pushback Slot Allocation.

In order to optimize aircraft pushback management during rush hour, aircraft pushback slot allocation based on congestion pricing is explored while considering monetary compensation based on the quality of the surface operations. First, the concept of the "external cost of surface congestion" is proposed, and a quantitative study on the external cost is performed. Then, an aircraft pushback slot allocation model for minimizing the total surface cost is established. An improved discrete differential evolutio...

Improved mechanistic understanding of natural gas methane emissions from spatially-resolved aircraft measurements.

Divergence in recent oil and gas related methane emission estimates between aircraft studies (basin total for a midday window) and emissions inventories (annualized regional and national statistics) indicate the need for better understanding the experimental design, including temporal and spatial alignment and interpretation of results. Our aircraft based methane emission estimates in a major US shale gas basin resolved from West to East show (i) similar spatial distributions for two days, (ii) strong spati...

A commitment contract to achieve virologic suppression in poorly adherent patients with HIV/AIDS.

Assess whether a commitment contract informed by behavioral economics leads to persistent virologic suppression among HIV-positive patients with poor antiretroviral therapy (ART) adherence.

NASA Fights Flight Delays.

Impact of surface maintenance on BioSand filter performance and flow.

The BioSand filter (BSF) is a household scaled, intermittently operated, slow sand filter. The BSF requires maintenance to remove trapped sediments. This study evaluated the effects of maintenance on the filter's flow rate and performance. Four concrete BSFs received three styles of maintenance: surface agitation (SA), stirring method (SM), and sand removal (SR). Effluent water was collected from the filter between 0-2 L effluent (0-2 L effluent) and between 15-20 L effluent (15 L+ effluent). After maintena...

Demand and Signing of General Practitioner Contract Service among the Urban Elderly: A Population-Based Analysis in Zhejiang Province, China.

This study aims to examine whether the urban elderly in the Zhejiang Province of China signed contracts with their general practitioner (GP) based on their health service needs, and to further identify the determinants of their demand and signing decisions. A community-based cross-sectional study was conducted in 16 community health service (CHS) institutions in Zhejiang Province, China. The urban elderly over 60 years of age were enrolled when visiting the sampled CHS. Baseline characteristics were compare...

Aircraft noise exposure and hypertension.

Mercury Ion Clock for a NASA Technology Demonstration Mission.

There are many different atomic frequency standard technologies but few meet the demanding performance, reliability, size, mass, and power constraints required for space operation. JPL is developing a linear ion trap based mercury ion clock, referred to as DSAC (Deep Space Atomic Clock) under NASA's Technology Demonstration Mission (TDM) program. This clock is expected to provide a new capability with broad application to space based navigation and science. A one year flight demonstration is planned as a ho...

Effectiveness of Antipsychotic Drugs for 24-Month Maintenance Treatment in First-Episode Schizophrenia: Evidence From a Community-Based "Real-World" Study.

Maintenance treatment of schizophrenia with antipsychotic medications has become a standard for the prevention of psychotic relapse. However, little is known about the effectiveness of antipsychotic drugs for maintenance treatment in "real-world" populations with schizophrenia. We carried out a prospective study to assess the effectiveness of the most frequently prescribed antipsychotic drugs in the maintenance treatment of schizophrenia from 2 community settings.

Aircraft-navigation-grade laser-driven FOG with Gaussian-noise phase modulation.

A laser-driven fiber optic gyroscope (FOG) is demonstrated with an angular random walk noise of 5.5×10-4  deg/√h, a drift of 6.8×10-3  deg/h, and an inferred scale-factor stability of 0.15 ppm, making it, to the best of our knowledge, the first laser-driven FOG to satisfy the performance requirements for inertial navigation of commercial aircraft. This is achieved using Gaussian white noise phase modulation to broaden the linewidth of the source laser and to strongly suppress the narrow-linewid...

Analysis of aeromedical retrieval coverage using elliptical isochrones: An evaluation of helicopter fleet size configurations in Scotland.

Trauma systems in remote and rural regions often rely on helicopter emergency medical services to facilitate access to definitive care. The siting of such resources is key, but often relies on simplistic modelling of coverage, using circular isochrones. Scotland is in the process of implementing a national trauma network, and there have been calls for an expansion of aeromedical retrieval capacity. The aim of this study was to analyse population and area coverage of the current retrieval service configurati...

The role of maintenance therapy in multiple myeloma.

Multiple myeloma is the second most common type of blood cancer and remains incurable despite advances in therapy. Current therapy for multiple myeloma includes a phased-approach, often consisting of initial induction therapy, consolidation and maintenance therapy. With an ever-growing landscape of treatment options, the approach to optimal therapy has become increasingly complex. Specifically, controversy surrounds the optimal use and duration of maintenance therapy. We conducted a comprehensive literature...

Erratum: A systematic rationale for defining the significance of aircraft noise impacts J. Acoust. Soc. Am. 136, 1129-1138 (2014).

Maintenance fluid therapy in a tertiary hospital: A prevalence study.

To assess the types of maintenance fluids used in our hospital, comparing their volume and composition to the standards recommended by the guidelines.

Treatment of a long-acting anticoagulant rodenticide poisoning cohort with vitamin K1 during the maintenance period.

Currently, there are few guidelines for the use of vitamin K1 in the maintenance treatment of long-acting anticoagulant rodenticide (LAAR) poisonings. We explored factors in the treatment of LAAR poisoning during the maintenance period in order to suggest feasible treatment models.Data from 24 cases of anticoagulant rodenticide poisoning in our hospital were collected from January 2013 to May 2016. The patients' sex, age, coagulation function, total time from poisoning to treatment with vitamin K1 (prehospi...

Examining maintenance care following infliximab salvage therapy for acute severe ulcerative colitis.

Data supporting the optimal maintenance drug therapy & strategy to monitor ongoing response following successful infliximab (IFX) induction, for acute severe ulcerative colitis (ASUC), are limited. We aimed to evaluate maintenance & monitoring strategies employed in patients post IFX induction therapy.

The new junior doctors' contract: a guide to safe working and the challenges it brings.

Maintenance treatment of ANCA-associated vasculitides.

ANCA-associated vasculitis(AAV)covers a group of systemic necrotising vasculitides characterised by inflammation of small vessels, sometimes with granuloma, and associated with autoantibodies to neutrophil cytoplasmic proteases (proteinase-3 or myeloperoxidase). Potentially lethal if not promptly diagnosed and treated, AAV in most patients can be induced into remission with the current treatment modalities. However, the risk of relapse remains high, necessitating prolonged immunosuppressive or immunomodulat...

How environmental noise can contract and destroy a persistence zone in population models with Allee effect.

A problem of the analysis of the noise-induced extinction in population models with Allee effect is considered. To clarify mechanisms of the extinction, we suggest a new technique combining an analysis of the geometry of attractors and their stochastic sensitivity. For the conceptual one-dimensional discrete Ricker-type model, on the base of the bifurcation analysis, deterministic persistence zones are constructed in the space of initial states and biological parameters. It is shown that the random environm...

DNA-thioguanine nucleotide concentration and relapse-free survival during maintenance therapy of childhood acute lymphoblastic leukaemia (NOPHO ALL2008): a prospective substudy of a phase 3 trial.

Adjustment of mercaptopurine and methotrexate maintenance therapy of acute lymphoblastic leukaemia by leucocyte count is confounded by natural variations. Cytotoxicity is primarily mediated by DNA-incorporated thioguanine nucleotides (DNA-TGN). The aim of this study was to establish whether DNA-TGN concentrations in blood leucocytes during maintenance therapy are associated with relapse-free survival.

Modeling Change in Project Duration and Completion: Scheduling Dynamics of NASA's Exploration Flight Test 1 (EFT-1) Activities.

In complex work domains and organizations, understanding schedule-ing dynamics can ensure objectives are reached and delays are mitigated. In the current paper, we examine the scheduling dynamics for NASA's Exploration Flight Test 1 (EFT-1) activities. For this examination, we specifically modeled simultaneous change in percent complete and estimated duration for a given project as they were included in monthly reports over time. In short, we utilized latent change score mixture modeling to extract the attr...


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