749 research outputs found

    Capturing, using, and managing quality assurance knowledge for shuttle post-MECO flight design

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    Ascent initialization values used by the Shuttle's onboard computer for nominal and abort mission scenarios are verified by a six degrees of freedom computer simulation. The procedure that the Ascent Post Main Engine Cutoff (Post-MECO) group uses to perform quality assurance (QA) of the simulation is time consuming. Also, the QA data, checklists and associated rationale, though known by the group members, is not sufficiently documented, hindering transfer of knowledge and problem resolution. A new QA procedure which retains the current high level of integrity while reducing the time required to perform QA is needed to support the increasing Shuttle flight rate. Documenting the knowledge is also needed to increase its availability for training and problem resolution. To meet these needs, a knowledge capture process, embedded into the group activities, was initiated to verify the existing QA checks, define new ones, and document all rationale. The resulting checks were automated in a conventional software program to achieve the desired standardization, integrity, and time reduction. A prototype electronic knowledge base was developed with Macintosh's HyperCard to serve as a knowledge capture tool and data storage

    Offender Assessment, Case Planning, and Referral to Community-Based Treatment: Effects of a Structured Process Improvement Initiative

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    This article is part of the supplement: Abstracts from the 2014 Addiction Health Services Research (AHSR) Conferenc

    Lessons from Elwha Ecosystem Restoration: Integrating science, policy, and management

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    After decades of debate, planning, and environmental impact studies, the largest planned dam removal project in history was conducted on the Elwha River in Washington State, USA, from 2011 to 2014. Because this was such a unique and unprecedented project, the planning, implementation, and monitoring has occurred over 30 years and required diverse expertise across multiple stakeholders. This knowledge portfolio required that individuals and organizations with different missions collaborate effectively to ensure a successful project. The story of this river, with rugged headwaters, protected wilderness, legendary and culturally important salmon runs, and two hydroelectric dams whose placement marshaled wholesale socioeconomic and ecological changes, has become an iconic saga of change, perseverance and renewal. The two dams blocked fish migrations and disrupted sediment transport for a century, disrupting the ecological structure and function of the Elwha River. Removal of the 64-m and 32-m tall dams and the release of a large portion of the 21 million cubic meters of stored reservoir sediment, has provided a living laboratory to study the patterns, processes and outcomes of dam removal across freshwater, estuarine, and marine ecosystem boundaries from multiple scientific perspectives. This collaborative multidisciplinary approach has allowed us to improve our understanding of ecosystem responses and linkages while making the Elwha River one of the best studied dam removal projects

    Effects of a strategy to improve offender assessment practices: Staff perceptions of implementation outcomes

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    Background: This implementation study examined the impact of an organizational process improvement intervention (OPII) on a continuum of evidence based practices related to assessment and community reentry of drug-involved offenders: Measurement/Instrumentation, Case Plan Integration, Conveyance/Utility, and Service Activation/Delivery. Methods: To assess implementation outcomes (staff perceptions of evidence-based assessment practices), a survey was administered to correctional and treatment staff (n = 1509) at 21 sites randomly assigned to an Early- or Delayed-Start condition. Hierarchical linear models with repeated measures were used to examine changes in evidence-based assessment practices over time, and organizational characteristics were examined as covariates to control for differences across the 21 research sites. Results: Results demonstrated significant intervention and sustainability effects for three of the four assessment domains examined, although stronger effects were obtained for intra- than inter-agency outcomes. No significant effects were found for Conveyance/Utility. Conclusions: Implementation interventions such as the OPII represent an important tool to enhance the use of evidence-based assessment practices in large and diverse correctional systems. Intra-agency assessment activities that were more directly under the control of correctional agencies were implemented most effectively. Activities in domains that required cross-systems collaboration were not as successfully implemented, although longer follow-up periods might afford detection of stronger effects

    Treatment of patients with rare bleeding disorders in the Netherlands:Real-life data from the RBiN study

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    Background Patients with rare inherited bleeding disorders (RBDs) exhibit hemorrhagic symptoms, varying in type and severity, often requiring only on-demand treatment. Prolonged bleeding after invasive procedures is common. Adequate peri-procedural therapy may reduce this bleeding risk. Objective To describe general treatment plans of RBD patients and evaluate the use of peri-procedural hemostatic therapy. Methods In the Rare Bleeding Disorders in the Netherlands (RBiN) study, RBD patients from all six Dutch Hemophilia Treatment Centers were included. General treatment plans were extracted from patient files. Patients with a dental or surgical procedure in their history were interviewed about use of peri-procedural treatment and bleeding complications. Results Two-hundred sixty-three patients with a rare coagulation factor deficiency or fibrinolytic disorder were included. Eighty-four percent had a documented general treatment plan. General treatment plans of patients with the same RBD were heterogeneous, particularly in factor XI deficiency. Overall, 308 dental and 408 surgical procedures were reported. Bleeding occurred in 50% of dental and 53% of surgical procedures performed without hemostatic treatment and in 28% of dental and 19% of surgical procedures performed with hemostatic treatment. Not only patients with severe RBDs, but also patients with mild deficiencies, experienced increased bleeding without proper hemostatic treatment. Conclusion Large heterogeneity in general treatment plans of RBD patients was found. Bleeding after invasive procedures was reported frequently, both before and after RBD diagnosis, irrespective of factor activity levels and particularly when peri-procedural treatment was omitted. Improved guidelines should include uniform recommendations for most appropriate hemostatic products per RBD and emphasize the relevance of individual bleeding history

    Planning, implementation, and monitoring Pacific salmonid recovery following the removal of two hydroelectric dams on Washington\u27s Elwha River

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    The removal of Elwha and Glines Canyon dams on the Elwha River is the largest existing dam removal project in the United States. Project planning, implementation, and monitoring have occurred over 30 years and has required diverse technical expertise. Because of the size and nature of the project—two high-head dams releasing massive amounts of sediment into the river, estuary, and nearshore ecosystem—the project was unprecedented and required a great deal of technical expertise to plan, execute, and monitor. The relative success of this project required effective collaboration among individuals and organizations with varying missions. Individuals with diverse technical expertise (i.e., engineering, geomorphology, hydrology, botany, wildlife, fisheries, stream ecology, ecological monitoring) have successfully collaborated to develop several technical plans ensuring dam removal was completed, while at the same time protecting a city water supply, infrastructure, and listed and unlisted salmonids in the basin. This collaboration has continued following dam removal through the implementation of a monitoring and adaptive management plan. Our monitoring strategy often uses multiple scientific methods to evaluate metrics or performance indicators to create multiple lines of evidence, reduce uncertainty, and ensure data availability. Employing such diverse methods would not have been possible without multidisciplinary and multiagency collaboration. Collaboration and extensive monitoring has allowed project partners to identify potential barriers, assess the rate and extent of recolonization, estimate abundance, life history attributes, and productivity. This collaborative multidisciplinary approach has allowed us to monitor salmonid recovery, while also improving our understanding of ecosystem response and linkages. This has resulted in the Elwha River being one of the best studied dam removal projects in history

    Effect of rye bread breakfasts on subjective hunger and satiety: a randomized controlled trial

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    <p>Abstract</p> <p>Background</p> <p>Several studies report that dietary fibre from different sources promotes the feeling of satiety and suppresses hunger. However, results for cereal fibre from rye are essentially lacking. The aim of the present study was to investigate subjective appetite during 8 h after intake of iso-caloric rye bread breakfasts varying in rye dietary fibre composition and content.</p> <p>Methods</p> <p>The study was divided into two parts. The first part (n = 16) compared the satiating effect of iso-caloric bread breakfasts including different milling fractions of rye (bran, intermediate fraction (B4) and sifted flour). The second part (n = 16) investigated the dose-response effect of rye bran and intermediate rye fraction, each providing 5 or 8 g of dietary fibre per iso-caloric bread breakfast. Both study parts used a wheat bread breakfast as reference and a randomised, within-subject comparison design. Appetite (hunger, satiety and desire to eat) was rated regularly from just before breakfast at 08:00 until 16:00. Amount, type and timing of food and drink intake were standardised during the study period.</p> <p>Results</p> <p>The Milling fractions study showed that each of the rye breakfasts resulted in a suppressed appetite during the time period before lunch (08:3012:00) compared with the wheat reference bread breakfast. At a comparison between the rye bread breakfasts the one with rye bran induced the strongest effect on satiety. In the afternoon the effect from all three rye bread breakfasts could still be seen as a decreased hunger and desire to eat compared to the wheat reference bread breakfast.</p> <p>In the Dose-response study both levels of rye bran and the lower level of intermediate rye fraction resulted in an increased satiety before lunch compared with the wheat reference bread breakfast. Neither the variation in composition between the milling fractions nor the different doses resulted in significant differences in any of the appetite ratings when compared with one another.</p> <p>Conclusion</p> <p>The results show that rye bread can be used to decrease hunger feelings both before and after lunch when included in a breakfast meal. Rye bran induces a stronger effect on satiety than the other two rye fractions used when served in iso-caloric portions.</p> <p>Trial Registration</p> <p>Trial registration number NCT00876785</p

    BioHealthBase: informatics support in the elucidation of influenza virus host–pathogen interactions and virulence

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    The BioHealthBase Bioinformatics Resource Center (BRC) (http://www.biohealthbase.org) is a public bioinformatics database and analysis resource for the study of specific biodefense and public health pathogens—Influenza virus, Francisella tularensis, Mycobacterium tuberculosis, Microsporidia species and ricin toxin. The BioHealthBase serves as an extensive integrated repository of data imported from public databases, data derived from various computational algorithms and information curated from the scientific literature. The goal of the BioHealthBase is to facilitate the development of therapeutics, diagnostics and vaccines by integrating all available data in the context of host–pathogen interactions, thus allowing researchers to understand the root causes of virulence and pathogenicity. Genome and protein annotations can be viewed either as formatted text or graphically through a genome browser. 3D visualization capabilities allow researchers to view proteins with key structural and functional features highlighted. Influenza virus host–pathogen interactions at the molecular/cellular and systemic levels are represented. Host immune response to influenza infection is conveyed through the display of experimentally determined antibody and T-cell epitopes curated from the scientific literature or as derived from computational predictions. At the molecular/cellular level, the BioHealthBase BRC has developed biological pathway representations relevant to influenza virus host–pathogen interaction in collaboration with the Reactome database (http://www.reactome.org)

    The Hubbard model within the equations of motion approach

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    The Hubbard model has a special role in Condensed Matter Theory as it is considered as the simplest Hamiltonian model one can write in order to describe anomalous physical properties of some class of real materials. Unfortunately, this model is not exactly solved except for some limits and therefore one should resort to analytical methods, like the Equations of Motion Approach, or to numerical techniques in order to attain a description of its relevant features in the whole range of physical parameters (interaction, filling and temperature). In this manuscript, the Composite Operator Method, which exploits the above mentioned analytical technique, is presented and systematically applied in order to get information about the behavior of all relevant properties of the model (local, thermodynamic, single- and two- particle ones) in comparison with many other analytical techniques, the above cited known limits and numerical simulations. Within this approach, the Hubbard model is shown to be also capable to describe some anomalous behaviors of the cuprate superconductors.Comment: 232 pages, more than 300 figures, more than 500 reference

    Ethnocentrism in the Netherlands: A typological analysis

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    Contains fulltext : 3327.pdf (publisher's version ) (Open Access)In research on unfavourable attitudes towards outgroups, the related favourable attitude towards the ingroup is generally ignored. Sumner (1906) called the presence of both related attitudes ethnocentrism. Since then only a small amount of empirical research has been dedicated to this theme. Based oh survey-data from a representative sample of Dutch citizens (N= 1,799) taken in 1985, this article concludes that ethnocentrism exists in The Netherlands. This contains unfavourable stereotypes about several outgroups as well as favourable stereotypes about the ingroup. The latter dimension also refers to nationalistic feelings. Both attitudes are highly related to each other. In this study the social and cultural pattern of ethnocentric people is shown to be of an authoritarian-conservative nature
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