127 research outputs found
Final Report: Review of the FITS Program: Program Tasks, Goals and Pilot Training Initiatives
In 2002 the FAA, academic and industry partners established the FAA/Industry Training Standards (FITS) program whose purpose is to modernize General Aviation (GA) pilot training. The FAA recognized the need to modernize training standards for pilots who would use new avionics technology that integrate the GPS (Global Positioning Systems) with the autopilot along with multifunction displays capable of depicting flight path, weather, terrain and traffic information. These avionics and displays are touted as improving safety by enhancing pilot Situational Awareness and reducing pilot workload. The new technology has highlighted the need for programs to train and certify pilots to use the avionics suites. The instrumentation places new demands on pilots including changes in the level and distribution of pilot workload during a flight, the need to manage and integrate information from multiple displays, navigate complex menu structures, and program navigation computers. The literature describing the FITS program argues that the current structure and content of GA pilot training programs will not adequately prepare pilots for the challenges of using these technologies (FAA, 2003a; Glista, 2003b; Wright, 2002). The FITS curriculum attempts to address these issues by stressing training of risk management (RM), situational awareness (SA), aeronautical decision making (ADM) and single-pilot resource management (SRM). It also proposes to change pilot instruction to make it more relevant to real world flying by relying on scenario-based training (SBT). FITS proposes to emphasize the use of scenarios as a means to practice the integration of individual skills as they might occur in the real world. For instance, a student pilot might be instructed to plan a flight from Wichita, KS to Kansas City, MO. The student would perform all the tasks necessary to plan the flight including preflight checks, route planning, checking the weather reroute etc. During the flight the student would demonstrate individual flight skills including turns, climbs, navigation, and communication while executing the scenario. The purpose of this project was to review research related to the proposed initiatives and to identify future research needs to support the long-term objectives of FITS. In addition to reviewing pertinent academic and government literature, the objectives of FITS were reviewed with representatives of the FAA, academic and industry partners. At present FITS materials provide few details regarding important components of the training initiative including decision making, the training requirements of advanced avionics technology and its effects on situation awareness. Future work should draw on an extensive academic literature and on lessons learned from prior industry experience when similar avionics technologies were introduced to commercial aviation. Also, clear distinctions should be made between SBT as employed in FITS and SBT used by the military and in commercial aviation. These are very different programs
Classification and Analysis of Errors Reported in Aircraft Maintenance Manuals
Previous research has identified maintenance information as one of the primary causal factors of maintenance error. Incorrect maintenance information has also been cited as a contributing factor in a number of recent aircraft mishaps. To date no one has studied the types of errors found in aircraft maintenance manuals published by manufacturers. The purpose of this research is to analyze Publication Change Requests (PCRs) to document the most frequently reported types of errors found in aircraft maintenance manual, to identify how errors vary across Air Transport Association (ATA) chapters, and identify the corrective actions required to address the cited problem. The most common request was for additional procedural information followed by requests to add or change the language to improve clarity. The results show that the majority of PCRs (42%) cited procedures found in Chapters 27 (Flight controls), 32 (Landing gear), and 71 (Powerplant)
Perceptual Grouping Effects on Cursor Movement Expectations
Objective: Two studies were conducted to develop an understanding of factors that drive user expectations when navigating between discrete elements on a display via a limited degree-of-freedom cursor control device. Background: For the Orion Crew Exploration Vehicle spacecraft, a free-floating cursor with a graphical user interface (GUI) would require an unachievable level of accuracy due to expected acceleration and vibration conditions during dynamic phases of flight. Therefore, Orion program proposed using a caged cursor to jump from one controllable element (node) on the GUI to another. However, nodes are not likely to be arranged on a rectilinear grid, and so movements between nodes are not obvious. Method: Proximity between nodes, direction of nodes relative to each other, and context features may all contribute to user cursor movement expectations. In an initial study, we examined user expectations based on the nodes themselves. In a second study, we examined the effect of context features on user expectations. Results: The studies established that perceptual grouping effects influence expectations to varying degrees. Based on these results, a simple rule set was developed to support users in building a straightforward mental model that closely matches their natural expectations for cursor movement. Conclusion: The results will help designers of display formats take advantage of the natural context- driven cursor movement expectations of users to reduce navigation errors, increase usability, and decrease access time. Application: The rules set and guidelines tie theory to practice and can be applied in environments where vibration or acceleration are significant, including spacecraft, aircraft, and automobiles
IgA Anti-Epidermal Transglutaminase Antibodies in Dermatitis Herpetiformis and Pediatric Celiac Disease
The sero-prevalence and sero-incidence of African horse sickness and equine encephalosis in selected horse and donkey populations in Zimbabwe
Sentinel herds and samples submitted by private equine practitioners were used to determine
the sero-prevalence and sero-incidence of African horse sickness virus (AHSV) and equine
encephalosis virus (EEV) in horse and donkey populations in the Highveld region of
Zimbabwe. The sero-prevalence and sero-incidence of antibodies against these viruses were
determined using the competitive enzyme-linked immunosorbent assay (ELISA) for the
detection of serum antibodies. In donkeys, the median sero-prevalence of AHSV antibodies,
across the three rainy seasons under study, was 75% (inter quartile range [IQR] 67–83), with a
seasonal median sero-incidence of 45% (IQR 40–63). In horses, the median sero-prevalence of
EEV antibodies was 63% (IQR 21–73), with a median seasonal sero-incidence of 10.5% (IQR
10–14), while in donkeys the median sero-prevalence of EEV antibodies was 80% (IQR 67–90),
with a median seasonal sero-incidence of 50% (IQR 40–60). This study highlighted the
significant levels of exposure of donkeys to AHSV and horses and donkeys to EEV in Zimbabwe
despite equine encephalosis remaining unreported by Zimbabwean veterinarians to date.
Most seroconversions in sentinel herd animals to AHSV and EEV occurred towards the end of
the rainy season in March, April and May corresponding to the time of the year when the
Culicoides vectors are in high abundance. In order to determine the clinical significance of these
infections, blood and spleen samples, submitted by private equine veterinary practitioners
over a 5-year period, from horses showing characteristic clinical signs of African horse sickness
were tested for the presence of viral antigen using the antigen capture ELISA. The median
sero-prevalence of AHSV antigen in horses recorded from these samples was 38% (IQR 33–88).
The predominant AHSV antigen from these samples was serotype 7 (33%) followed by
serotype 2 (26%) and serotypes 4 and 8 (16% each). African horse sickness virus serotypes 3
and 9, identified in this study, had not been previously reported in Zimbabwe.The Biomedical Research and Training Institute and the Wellcome Trust.http://www.ojvr.orgam2017Equine Research Centr
The occurrence of Culicoides species, the vectors of arboviruses, at selected trap sites in Zimbabwe
A study of the distribution of Culicoides species was conducted by establishing 12 light trap
sites over five rainy seasons between 1998 and 2003 covering all the geo-climatic natural
regions of Zimbabwe. In total, 279 919 specimens of Culicoides were trapped over a total of 163
trapping nights. The highest median counts of Culicoides per trapping night were recorded in
natural region III, which has climatic conditions conducive to the successful development of
the larvae. Culicoides imicola, the major vector of bluetongue and African horse sickness viruses
in Africa, was found to be the most abundant species (80.4%), followed by Culicoides enderleini
(5.9%) and Culicoides milnei (5.2%). This study identified 10 species of Culicoides that had not
been previously described in Zimbabwe, including Culicoides loxodontis and Culicoides miombo,
which are members of the C. imicola complex. A total of 23 994 Culicoides midges were collected
from five trap sites in Harare, Zimbabwe, with the dominant species, C. imicola, representing
91.6% of the total collection. Seventeen arboviruses were isolated from these midges, 15 of
which were bluetongue virus. The predominant bluetongue virus serotype was serotype 11,
followed by serotypes 1, 8, 12 and 15. Bluetongue virus serotypes 1, 2, 8, 10, 12, 15, 16 and 18,
detected in this study, had not been previously reported in Zimbabwe.http://www.ojvr.org/am201
Middle and Late Pleistocene environmental history of the Marsworth area, south-central England
To elucidate the Middle and Late Pleistocene environmental history of south-central England, we report the stratigraphy, sedimentology, palaeoecology and geochronology of some deposits near the foot of the Chiltern Hills scarp at Marsworth, Buckinghamshire. The Marsworth site is important because its sedimentary sequences contain a rich record of warm stages and cold stages, and it lies close to the Anglian glacial limit. Critical to its history are the origin and age of a brown pebbly silty clay (diamicton) previously interpreted as weathered till.
The deposits described infill a river channel incised into chalk bedrock. They comprise clayey, silty and gravelly sediments, many containing locally derived chalk and some with molluscan, ostracod and vertebrate remains. Most of the deposits are readily attributed to periglacial and fluvial processes, and some are dated by optically stimulated luminescence to Marine Isotope Stage (MIS) 6. Although our sedimentological data do not discriminate between a glacial or periglacial interpretation of the diamicton, amino-acid dating of three molluscan taxa from beneath it indicates that it is younger than MIS 9 and older than MIS 5e. This makes a glacial interpretation unlikely, and we interpret the diamicton as a periglacial slope deposit.
The Pleistocene history reconstructed for Marsworth identifies four key elements: (1) Anglian glaciation during MIS 12 closely approached Marsworth, introducing far-travelled pebbles such as Rhaxella chert and possibly some fine sand minerals into the area. (2) Interglacial environments inferred from fluvial sediments during MIS 7 varied from fully interglacial conditions during sub-stages 7e and 7c, cool temperate conditions during sub-stage 7b or 7a, temperate conditions similar to those today in central England towards the end of the interglacial, and cool temperate conditions during sub-stage 7a. (3) Periglacial activity during MIS 6 involved thermal contraction cracking, permafrost development, fracturing of chalk bedrock, fluvial activity, slopewash, mass movement and deposition of loess and coversand. (4) Fully interglacial conditions during sub-stage 5e led to renewed fluvial activity, soil formation and acidic weathering
Impact of spliceosome mutations on RNA splicing in myelodysplasia: dysregulated genes/pathways and clinical associations.
SF3B1, SRSF2, and U2AF1 are the most frequently mutated splicing factor genes in the myelodysplastic syndromes (MDS). We have performed a comprehensive and systematic analysis to determine the effect of these commonly mutated splicing factors on pre-mRNA splicing in the bone marrow stem/progenitor cells and in the erythroid and myeloid precursors in splicing factor mutant MDS. Using RNA-seq, we determined the aberrantly spliced genes and dysregulated pathways in CD34+ cells of 84 patients with MDS. Splicing factor mutations result in different alterations in splicing and largely affect different genes, but these converge in common dysregulated pathways and cellular processes, focused on RNA splicing, protein synthesis, and mitochondrial dysfunction, suggesting common mechanisms of action in MDS. Many of these dysregulated pathways and cellular processes can be linked to the known disease pathophysiology associated with splicing factor mutations in MDS, whereas several others have not been previously associated with MDS, such as sirtuin signaling. We identified aberrantly spliced events associated with clinical variables, and isoforms that independently predict survival in MDS and implicate dysregulation of focal adhesion and extracellular exosomes as drivers of poor survival. Aberrantly spliced genes and dysregulated pathways were identified in the MDS-affected lineages in splicing factor mutant MDS. Functional studies demonstrated that knockdown of the mitosis regulators SEPT2 and AKAP8, aberrantly spliced target genes of SF3B1 and SRSF2 mutations, respectively, led to impaired erythroid cell growth and differentiation. This study illuminates the effect of the common spliceosome mutations on the MDS phenotype and provides novel insights into disease pathophysiology
Using electronic medical record data to assess chronic kidney disease, type 2 diabetes and cardiovascular disease testing, recognition and management as documented in Australian general practice: a cross-sectional analysis
Objectives To evaluate the capacity of general practice (GP) electronic medical record (EMR) data to assess risk factor detection, disease diagnostic testing, diagnosis, monitoring and pharmacotherapy for the interrelated chronic vascular diseases-chronic kidney disease (CKD), type 2 diabetes (T2D) and cardiovascular disease. Design Cross-sectional analysis of data extracted on a single date for each practice between 12 April 2017 and 18 April 2017 incorporating data from any time on or before data extraction, using baseline data from the Chronic Disease early detection and Improved Management in PrimAry Care ProjecT. Deidentified data were extracted from GP EMRs using the Pen Computer Systems Clinical Audit Tool and descriptive statistics used to describe the study population. Setting Eight GPs in Victoria, Australia. Participants Patients were ≥18 years and attended GP ≥3 times within 24 months. 37 946 patients were included. Results Risk factor and disease testing/monitoring/treatment were assessed as per Australian guidelines (or US guidelines if none available), with guidelines simplified due to limitations in data availability where required. Risk factor assessment in those requiring it: 30% of patients had body mass index and 46% blood pressure within guideline recommended timeframes. Diagnostic testing in at-risk population: 17% had diagnostic testing as per recommendations for CKD and 37% for T2D. Possible undiagnosed disease: Pathology tests indicating possible disease with no diagnosis already coded were present in 6.7% for CKD, 1.6% for T2D and 0.33% familial hypercholesterolaemia. Overall prevalence: Coded diagnoses were recorded in 3.8% for CKD, 6.6% for T2D, 4.2% for ischaemic heart disease, 1% for heart failure, 1.7% for ischaemic stroke, 0.46% for peripheral vascular disease, 0.06% for familial hypercholesterolaemia and 2% for atrial fibrillation. Pharmaceutical prescriptions: the proportion of patients prescribed guideline-recommended medications ranged from 44% (beta blockers for patients with ischaemic heart disease) to 78% (antiplatelets or anticoagulants for patients with ischaemic stroke). Conclusions Using GP EMR data, this study identified recorded diagnoses of chronic vascular diseases generally similar to, or higher than, reported national prevalence. It suggested low levels of extractable documented risk factor assessments, diagnostic testing in those at risk and prescription of guideline-recommended pharmacotherapy for some conditions. These baseline data highlight the utility of GP EMR data for potential use in epidemiological studies and by individual practices to guide targeted quality improvement. It also highlighted some of the challenges of using GP EMR data
Crop Updates 2010 - Farming Systems
This session covers twenty papers from different authors:
Pests and Disease
1. Preserving phosphine for use in Grain Storage Industry, Christopher R Newman, Department of Agriculture and Food
Farming Systems Research
2. Demonstrating the benefits of grazing canola in Western Australia, Jonathan England, Stephen Gherardi and Mohammad Amjad, Department of Agriculture and Food
3. Buloke barley yield when pasture-cropped across subtropical perennial pastures, David Ferris, Department of Agriculture and Food, Phil Ward and Roger Lawes, CSIRO
4. Is pasture cropping viable in WA? Grower perceptions and EverCrop initiatives to evaluate, David Ferris, Tim Wiley, Perry Dolling, Department of Agriculture and Food, Philip Barrett-Lennard, Evergreen farming
5. Best-bet management for dual-purpose canola, John Kirkegaard, Susan Sprague, Hugh Dove and Walter Kelman, CSIRO, Canberra, Peter Hamblin, Agritech Research, Young, NSW
6. Pasture in cropping systems – with and without sheep, Brad Nutt and Angelo Loi, Department of Agriculture and Food
7. Can technology substitute for a lupin break? Wayne Parker, Department of Agriculture and Food
8. Canola row spacing with and without long term stubble retention on a sandy clay loam at Merredin, Glen Riethmuller, Department of Agriculture and Food
9. Impact of stubble retention on water balance and crop yield, Phil Ward1, Ken Flower2,3, Neil Cordingley2 and Shayne Micin1, 1CSIRO, Wembley, Western Australia, 2Western Australian No-Till Farmers Association, 3University of Western Australia
Analysis and Modelling
10. Using POAMA rainfall forecasts for crop management in South-West WA, Senthold Asseng1, Peter McIntosh2,3, Mike Pook2,3, James Risbey2,3, Guomin
Wang3, Oscar Alves3, Ian Foster4, Imma Farre4 and Nirav Khimashia1, 1CSIRO Plant Industry, Perth, 2CSIRO Marine and Atmospheric Research, Hobart, 3Centre for Australian Weather and Climate Research (CAWCR), A partnership between the Australian Bureau of Meteorology and CSIRO, Melbourne, 4Department of Agriculture and Food
11. Adaption to changing climates and variability – results of the Agribusiness Changing Climates regional workshop, Anderson W3, Beard D3, Blake J3, Grieve R1, Lang M3, Lemon J3, McTaggart R3, Gray D3, Price M2 and Stephens D3, 1Roderick Grieve Farm Management Consultants, 2Coffey International P/L, 3Department of Agriculture and Food
12. Farmers’ management of seasonal variability and climate change in WA, DA Beard, DM Gray, P Carmody, Department of Agriculture and Food
13. Is there a value in having a frost forecast for wheat in South-West WA? Imma Farre1, Senthold Asseng2, Ian Foster1 and Doug Abrecht3, 1Department of Agriculture and Food, CSIRO, Floreat, 2CSIRO Plant Industry, Perth
3Department of Agriculture and Food, Centre for Cropping Systems
14. Does buying rainfall pay? Greg Kirk, Planfarm Agricultural Consultants
15. Which region in the WA wheatbelt makes best use of rainfall? Peter Rowe, Bankwest Agribusiness
16. POAMA – the Predictive Ocean-Atmosphere Model for Australia, Guomin Wang and Oscar Alves, Centre for Australian Weather and Climate Research (CAWCR), A partnership between the Australian Bureau of Meteorology and CSIRO, Melbourne
17. Exploring the link between water use efficiency and farm profitability, Cameron Weeks, Planfarm and Peter Tozer, PRT Consulting
Precision Agriculture
18. A plethora of paddock information is available – how does it stack up? Derk Bakker, Department of Agriculture and Food
18. Variable rate prescription mapping for lime inputs based on electromagnetic surveying and deep soil testing, Frank D’Emden, Quenten Knight and Luke Marquis, Precision Agronomics, Australia
19. Trial design and analysis using precision agriculture and farmer’s equipment, Roger Lawes, CSIRO Sustainable Ecosystems, Centre for Environment and Life
Sciences, Floreat
20. Farmer perspectives of precision agriculture in Western Australia: Issues and the way forward, Dr Roger Mandel, Curtin Universit
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