Sample records for krista leppik helis

  1. Operation Heli-STAR - Atlanta Communications Experiment (ACE). Volume 9

    NASA Technical Reports Server (NTRS)


    Operation Heli-STAR (Helicopter Short-Haul Transportation and Aviation Research) was established and operated in Atlanta, Georgia, during the period of the 1996 Centennial Olympic Games. Heli-STAR had three major thrusts: (1) the establishment and operation of a helicopter-based cargo transportation system, (2) the management of low-altitude air traffic in the airspace of an urban area, and (3) the collection and analysis of research and development data associated with items 1 and 2. Heli-STAR was a cooperative industry/government program that included parcel package shippers and couriers in the Atlanta area, the helicopter industry, aviation electronics manufacturers, the Federal Aviation Administration (FAA), the National Aeronautics and Space Administration (NASA), and support contractors. Several detailed reports have been produced as a result of Operation Heli-STAR. These include four reports on acoustic measurements and associated analyses, and reports on the Heli-STAR tracking data including the data processing and retrieval system, the Heli-STAR cargo simulation, and the community response system. In addition, NASA's Advanced General Aviation Transport Experiments (AGATE) program has produced a report describing the Atlanta Communications Experiment (ACE) which produced the avionics and ground equipment using automatic dependent surveillance-broadcast (ADS-B) technology. This latter report is restricted to organizations belonging to NASA's AGATE industry consortium. A complete list of these reports is shown on the following page.

  2. 76 FR 16462 - In the Matter of Heli Electronics Corp., Order of Suspension of Trading

    Federal Register 2010, 2011, 2012, 2013, 2014


    ... From the Federal Register Online via the Government Publishing Office SECURITIES AND EXCHANGE COMMISSION In the Matter of Heli Electronics Corp., Order of Suspension of Trading March 21, 2011. It appears... concerning the securities of Heli Electronics Corp. (``HELI''), a Nevada corporation with headquarters...

  3. HELI-DEM portal for geo-processing services

    NASA Astrophysics Data System (ADS)

    Cannata, Massimiliano; Antonovic, Milan; Molinari, Monia


    HELI-DEM (Helvetia-Italy Digital Elevation Model) is a project developed in the framework of Italy/Switzerland Operational Programme for Trans-frontier Cooperation 2007-2013 whose major aim is to create a unified digital terrain model that includes the alpine and sub-alpine areas between Italy and Switzerland. The partners of the project are: Lombardy Region, Piedmont Region, Polytechnic of Milan, Polytechnic of Turin and Fondazione Politecnico from Italy; Institute of Earth Sciences (SUPSI) from Switzerland. The digital terrain model has been produced by integrating and validating the different elevation data available for the areas of interest, characterized by different reference frame, resolutions and accuracies: DHM at 25 m resolution from Swisstopo, DTM at 20 m resolution from Lombardy Region, DTM at 5 m resolution from Piedmont Region and DTM LiDAR PST-A at about 1 m resolution, that covers the main river bed areas and is produced by the Italian Ministry of the Environment. Further results of the project are: the generation of a unique Italian Swiss geoid with an accuracy of few centimeters (Gilardoni et al. 2012); the establishment of a GNSS permanent network, prototype of a transnational positioning service; the development of a geo-portal, entirely based on open source technologies and open standards, which provides the cross-border DTM and offers some capabilities of analysis and processing through the Internet. With this talk, the authors want to present the main steps of the project with a focus on the HELI-DEM geo-portal development carried out by the Institute of Earth Sciences, which is the access point to the DTM outputted from the project. The portal, accessible at, is a demonstration of open source technologies combined for providing access to geospatial functionalities to wide non GIS expert public. In fact, the system is entirely developed using only Open Standards and Free and Open Source Software (FOSS

  4. Improving proximal fixation and seal with the HeliFx Aortic EndoAnchor.


    Deaton, David H


    Endovascular aneurysm repair (EVAR) transformed the therapy for aortic aneurysms and introduced an era of widespread use for endovascular procedures in a variety of vascular beds. Although dramatic improvements in acute outcomes drove the early enthusiasm for EVAR, a realization that the long-term integrity of the endoprostheses used for EVAR were sometimes inferior to the results obtained with open surgical reconstruction dampened enthusiasm for their use in low-risk and younger patients who mandated long-term follow-up. While early EVAR failure modes are often related to technical aspects of the implantation, late failures are often related to the implant migrating from its original longitudinal position or losing wall apposition in the face of continued aneurysmal dilatation. Migration, or the failure of longitudinal fixation, results in gradual loss of aortic approximation and the eventual repressurization of the aneurysm sac with its attendant risks of growth and rupture. The inability of stent- and barb-based endovascular fixation to resist aortic dilatation at the site of fixation also represents a late failure mode that can result in aneurysm rupture. A variety of endostaples or endoanchors designed to replicate the function of an interrupted aortic suture have been proposed and tested to varying degrees over the years. The device designed and produced by Aptus EndoSystems, now called the HeliFx Aortic EndoAnchor is the only independent endovascular fixation device that has achieved significant clinical usage and Food and Drug Administration approval. The experience with this device is now more than 5 years and it is approved for use in the broad market across both Europe and the United States. This article will review the engineering and design concepts underlying the HeliFx device as well as the in vitro and in vivo results using this device. Finally, a discussion of the potential for technical, procedural, and endograft innovation based on the

  5. Creation of a Multiresolution and Multiaccuracy Dtm: Problems and Solutions for Heli-Dem Case Study

    NASA Astrophysics Data System (ADS)

    Biagi, L.; Carcano, L.; Lucchese, A.; Negretti, M.


    The work is part of "HELI-DEM" (HELvetia-Italy Digital Elevation Model) project, funded by the European Regional Development Fund within the Italy-Switzerland cooperation program. The aim of the project is the creation of a unique DTM for the alpine and subalpine area between Italy (Piedmont, Lombardy) and Switzerland (Ticino and Grisons Cantons); at present, different DTMs, that are in different reference frames and have been obtained with different technologies, accuracies, and resolutions, have been acquired. The final DTM should be correctly georeferenced and produced validating and integrating the data that are available for the project. DTMs are fundamental in hydrogeological studies, especially in alpine areas where hydrogeological risks may exist. Moreover, when an event, like for example a landslide, happens at the border between countries, a unique and integrated DTM which covers the interest area is useful to analyze the scenario. In this sense, HELI-DEM project is helpful. To perform analyses along the borders between countries, transnational geographic information is needed: a transnational DTM can be obtained by merging regional low resolution DTMs. Moreover high resolution local DTMs should be used where they are available. To be merged, low and high resolution DTMs should be in the same three dimensional reference frame, should not present biases and should be consistent in the overlapping areas. Cross-validation between the different DTMs is therefore needed. Two different problems should be solved: the merging of regional, partly overlapping low and medium resolution DTMs into a unique low/medium resolution DTM and the merging with other local high resolution/high accuracy height data. This paper discusses the preliminary processing of the data for the fusion of low and high resolution DTMs in a study-case area within the Lombardy region: Valtellina valley. In this region the Lombardy regional low resolution DTM is available, with a horizontal

  6. Redescription of two subterranean amphipods Niphargusmolnari Méhely, 1927 and Niphargusgebhardti Schellenberg, 1934 (Amphipoda, Niphargidae) and their phylogenetic position.


    Angyal, Dorottya; Balázs, Gergely; Zakšek, Valerija; Krízsik, Virág; Fišer, Cene


    A detailed redescription of two endemic, cave-dwelling niphargid species of the Hungarian Mecsek Mts., Niphargusmolnari Méhely, 1927 and Niphargusgebhardti Schellenberg, 1934 is given based on newly collected material. Morphology was studied under light microscopy and with scanning electon microscopy. Morphological descriptions are complemented with mitochondrial cytochrome c oxidase subunit I (COI) sequences as barcodes for both species and with notes on their ecology. Using three independent molecular markers we showed that Niphargusgebhardti belongs to the clade distributed between Central and Eastern Europe, whereas phylogenetic relationship of Niphargusmolnari to the rest of Niphargus species is not clear. The two species from the Mecsek Mts. are phylogenetically not closely related. Both species need to be treated as vulnerable according to IUCN Red List of Threatened Species.

  7. Hyperspherical coupled channel calculations of energy and structure of 4He-4He-Li+ and its isotopic combinations

    NASA Astrophysics Data System (ADS)

    Liu, Min-min; Wu, Meng-Shan; Han, Hui-li; Shi, Ting-yun


    The ground state vibrational energy and spatial features of 4He-4He-Li+ and its triatomic isotopic complexes are studied using the slow variable discretization (SVD) method in the hyperspherical coordinates for the zero total angular momentum. Our results show that the dominant structure of the system is an isosceles triangle with the shorter side associated with the two Li+-He distances using the sum-of-potential approximation. Corrections caused by the induced dipole-induced dipole interactions on the He atoms are also investigated. The effects are seen to be small and have a minor influence on the binding energy and the structure of present system. The results are also compared with the full ab initio calculations including all the three-body interactions and information of three-body corrections is obtained.

  8. Redescription of two subterranean amphipods Niphargus molnari Méhely, 1927 and Niphargus gebhardti Schellenberg, 1934 (Amphipoda, Niphargidae) and their phylogenetic position

    PubMed Central

    Angyal, Dorottya; Balázs, Gergely; Zakšek, Valerija; Krízsik, Virág; Fišer, Cene


    Abstract A detailed redescription of two endemic, cave-dwelling niphargid species of the Hungarian Mecsek Mts., Niphargus molnari Méhely, 1927 and Niphargus gebhardti Schellenberg, 1934 is given based on newly collected material. Morphology was studied under light microscopy and with scanning electon microscopy. Morphological descriptions are complemented with mitochondrial cytochrome c oxidase subunit I (COI) sequences as barcodes for both species and with notes on their ecology. Using three independent molecular markers we showed that Niphargus gebhardti belongs to the clade distributed between Central and Eastern Europe, whereas phylogenetic relationship of Niphargus molnari to the rest of Niphargus species is not clear. The two species from the Mecsek Mts. are phylogenetically not closely related. Both species need to be treated as vulnerable according to IUCN Red List of Threatened Species. PMID:26175603

  9. Study of collective flows of protons and π^{{-}}_{} -mesons in p+C, Ta and He+Li, C collisions at momenta of 4.2, 4.5 and 10 AGeV/c

    NASA Astrophysics Data System (ADS)

    Chkhaidze, L.; Chlachidze, G.; Djobava, T.; Galoyan, A.; Kharkhelauri, L.; Togoo, R.; Uzhinsky, V.


    Collective flows of protons and π- -mesons are studied at the momenta of 4.2, 4.5 and 10AGeV/ c for p+C, Ta and He+Li, C interactions. The data were obtained from the streamer chamber (SKM-200-GIBS) and from the Propane Bubble Chamber (PBC-500) systems utilized at JINR. A method of Danielewicz and Odyniec has been employed in determining a directed transverse flow of particles. The values of the transverse flow parameter and the strength of the anisotropic emission were defined for each interacting nuclear pair. It is found that the directed flows of protons and pions decrease with increasing the energy and the mass numbers of colliding nucleus pairs. The π^{{-}}_{} -meson and proton flows exhibit opposite directions in all studied interactions, and the flows of protons are directed in the reaction plane. The Ultra-relativistic Quantum Molecular Dynamical Model (UrQMD) coupled with the Statistical Multi-fragmentation Model (SMM), satisfactorily describes the obtained experimental results.

  10. Next Generation HeliMag UXO Mapping Technology

    DTIC Science & Technology


    for deployment of seven total-field magnetometers on a Kevlar reinforced boom mounted on a Bell 206L helicopter. The objectives of this...aircraft, thereby increasing productivity (less weight provides an opportunity for more fuel and longer flight duration), expanding applicability (less...weight provides a greater operational altitude range at existing fuel load conditions), and reducing risk (any aviation activity has an element of

  11. 14 CFR 77.29 - Airport imaginary surfaces for heli-ports.

    Code of Federal Regulations, 2010 CFR


    ... feet. The slope of the approach surface is 8 to 1 for civil heliports and 10 to 1 for military... boundaries of the heliport primary surface and from the approach surfaces at a slope of 2 to 1 for a...

  12. 14 CFR 77.29 - Airport imaginary surfaces for heli-ports.

    Code of Federal Regulations, 2011 CFR


    ... where its width is 500 feet. The slope of the approach surface is 8 to 1 for civil heliports and 10 to 1... from the lateral boundaries of the heliport primary surface and from the approach surfaces at a...

  13. Ultra-heavy vertical lift system: The Heli-Stat. [helicopter - airship combination for materials handling

    NASA Technical Reports Server (NTRS)

    Piasecki, F. N.


    A hybrid VTOL airship which is combined with helicopters is evaluated. The static lift of the airship supports approximately the full empty weight of the entire assembly. The helicopter rotors furnish the lift to support the payload as well as the propulsion and control about all axes. Thus existing helicopters, with no new technology required, can be made to lift payloads of ten times the capacity of each one alone, and considerably more than that of any airship built so far. A vehicle is described which has a 75-ton payload, based on four existing CH-53D helicopters and an airship of 3,600,000 cu. ft. The method of interconnection is described along with discussion of control, instrumentation, drive system and critical design conditions. The vertical lift and positioning capabilities of this vehicle far exceed any other means available today, yet can be built with a minimum of risk, development cost and time.

  14. Examining Teacher Knowledge and Attitudes about School Issues for Children with Epilepsy: A Mixed-Method Investigation

    ERIC Educational Resources Information Center

    Roux, Amy Loomis


    Epilepsy is one of the most common diseases to affect the human nervous system, affecting approximately 0.5% of school-age children (Leppik, 2001; Kaleyias et al., 2005). Epilepsy has the potential to profoundly impact a child's adjustment to school. A large body of literature documents that children with epilepsy are at an increased risk for…

  15. Advanced Control System Increases Helicopter Safety

    NASA Technical Reports Server (NTRS)


    With support and funding from a Phase II NASA SBIR project from Ames Research Center, Hoh Aeronautics Inc. (HAI), of Lomita, California, produced HeliSAS, a low-cost, lightweight, attitude-command-attitude-hold stability augmentation system (SAS) for civil helicopters and unmanned aerial vehicles. HeliSAS proved itself in over 160 hours of flight testing and demonstrations in a Robinson R44 Raven helicopter, a commercial helicopter popular with news broadcasting and police operations. Chelton Flight Systems, of Boise, Idaho, negotiated with HAI to develop, market, and manufacture HeliSAS, now available as the Chelton HeliSAS Digital Helicopter Autopilot.

  16. A Cultural Resource Inventory of the Left Bank of Lake Oahe: Burleigh and Emmons Counties, North Dakota. Volume 1

    DTIC Science & Technology


    vegetative cover. Such forbs as iris (Iris missouriensis), giant goldenrod (Solida 3131 Heli jantea), Jerusalem artichoke (Helianthus...big bluestem and such forbs as Jerusalem artichoke , ground cherry (Physalis heterophylla) and fragrant giant hyssop (Agastache foeniculacium

  17. 76 FR 41602 - Fair Credit Reporting Risk-Based Pricing Regulations

    Federal Register 2010, 2011, 2012, 2013, 2014


    ... ``information overload'' for consumers, and detract from the primary purpose of the credit score information... respective risk-based pricing rules to require disclosure of credit scores and information relating to credit... rules are effective August 15, 2011. FOR FURTHER INFORMATION CONTACT: Board: Krista P. Ayoub,...

  18. Using Multi-Angle WorldView-2 Imagery to Determine Ocean Depth Near Oahu, Hawaii

    DTIC Science & Technology


    NAVAL POSTGRADUATE SCHOOL MONTEREY , CALIFORNIA THESIS Approved for public release; distribution is unlimited USING MULTI-ANGLE...FUNDING NUMBERS 6. AUTHOR(S) Krista R. Lee 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) Naval Postgraduate School Monterey , CA multiple angles over shallow water provide analysts with a unique perspective of bathymetry in coastal areas. Observations taken by

  19. CTC Sentinel. Volume 7, Issue 5

    DTIC Science & Technology


    Ansaru is the abbreviated name for Jama`at Ansar al- Muslimin fi Bilad al-Sudan, which in Arabic means Sup- porters of Muslims in the Land of Black...York Times, April 23, 2013; Krista Larson, “In Central African Republic, Diamonds Are Seleka Rebels’ Best Friend,” Associated Press, May 6, 2013. 50

  20. A Decision Tool to Evaluate Budgeting Methodologies for Estimating Facility Recapitalization Requirements

    DTIC Science & Technology


    REQUIREMENTS   THESIS Presented to the Faculty Department of Systems and Engineering Management Graduate School of Engineering and... Management Air Force Institute of Technology Air University Air Education and Training Command In Partial Fulfillment of the Requirements for the Degree...of Master of Science in Engineering Management Krista M. Hickman, BS Captain, USAF March 2008 APPROVED FOR PUBLIC RELEASE; DISTRIBUTION

  1. Overcoming Unintentional Barriers with Intentional Strategies: Educating Faculty about Student Disabilities

    ERIC Educational Resources Information Center

    Forrest, Krista D.


    Krista Forrest is an Assistant Professor in the Department of Psychology at the University of Nebraska at Kearney, where she teaches general psychology and life span development as well as advanced courses in adolescent psychology, group dynamics, and psychology and law. A graduate of North Carolina State University with a MS in developmental…

  2. Utopia University: A Faculty Member Reflects on Recommendations for the Future of SoTL

    ERIC Educational Resources Information Center

    Forrest, Krista D.


    The author, Krista D. Forrest, Professor of Psychology, University of Nebraska at Kearney, reports on what it would take to create a "Utopian university," a campus of the future where faculty members' scholarship of teaching and learning (SoTL) has gone on to change departments and as the departments changed, so did the institution.…

  3. Performing the Groundwork: Building a WEC/WAC Writing Program at The College of St. Scholastica

    ERIC Educational Resources Information Center

    Bastian, Heather


    This program profile describes the efforts needed to develop a new writing program at a small college. The author explores how she cultivated relations with disciplinary faculty to collaboratively redefine a "problem" into an opportunity by adopting Krista Ratcliffe's technique of rhetorical listening. She then outlines the…

  4. On Being Watched: Teaching the Wisdom of Adulthood

    ERIC Educational Resources Information Center

    Heischman, Daniel R.


    In "Speaking of Faith," radio journalist Krista Tippett recalls the time when she began to recognize the hypocrisy and contradictions in the behavior of the people around her. Tippett's experience is not only far from unusual, it is formative. It led her to make some important decisions in her life, including the desire never to live a life of…

  5. IFLA General Conference, 1989. Division of Special Libraries. Section of Administrative Libraries; Section of Social Science Libraries; Section of Geography and Map Libraries; Section of Science and Technology Libraries; Section of Biological and Medical Science Libraries; Section of Art Libraries; Joint Session with the Round Table on Audiovisual Media. The International Association of Law Libraries. Booklet 20.

    ERIC Educational Resources Information Center

    International Federation of Library Associations, The Hague (Netherlands).

    Twenty-one papers from the Division of Special Libraries are included in this collection: "Information Systems Planning as a Tool of Developing Library Work: The Case of Statistics Library" (Heli Myllys); "The Libraries of the French Central Government Departments and the Administrative Library of the City of Paris" (French and English versions;…


    EPA Science Inventory

    US EPA currently has H. pylori on its Contaminant Candidate List 2 (CCL 2), methods are needed to detect the occurrence of viable H. pylori in drinking water. H. pyloi is an interesting microorganism because it can change from a cultural and metabolically active state with a heli...

  7. Regenerative Engine Analysis Program (REAP).

    DTIC Science & Technology


    were con- sidered in an effort to identify promising concepts for heli- copter applications. The aero/ thermodynamic characteristics of heat exchangers...AiResearch for small engines. The program, entitled WATE (Weight Analysis of Turbine Engines) accepts as inputs the geometric, thermodynamic ...Military Airplane Development; NASA-Lewis Research Center CR159431, Jan- uary 1979. 27 INPUT: - CONFIGURATION DATA - THERMODYNAMIC DATA - MECHANICAL AND

  8. Almond of Loretto: Scottish Educational Visionary and Reformer.

    ERIC Educational Resources Information Center

    Mangan, J. A.


    The author details the influence of Hely Hutchinson Almond (1832-1903) on education in Scotland. In 1862 Almond purchased Loretto, a small private school at Musselburgh, where he taught his doctrine of rationality, or sound living, for the next 41 years. (KC)

  9. A History of the U.S. Army Officer Corps, 1900-1990

    DTIC Science & Technology


    consisting of the Abrams tank, the Bradley fighting vehicle, the Apache attack heli- copter, the Black Hawk utility helicopter, and the Pa- triot air...II-17/18; Lieutenant Col- onel Carroll B. Hodges, Chief, Personnel Research Branch, Per- sonnel Retrieval and Processing (PR&P) Division, the

  10. Sequential sampling for panicle caterpillars (Lepidoptera: Noctuidae) in sorghum

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Sorghum panicle worm is an economically important insect pest complex of sorghum throughout the Great Plains of the United States, particularly in Texas, Oklahoma, and Kansas. The sorghum panicle worm complex consists of larvae of two highly polyphagous lepidopteran species: the corn earworm, Heli...

  11. The Gap that Will Not Close: Civil-Military Relations and the All-Volunteer Force

    DTIC Science & Technology


    34An unprecedented number of veterans in our civilian community, and particularly their organized spokesmen, produce a military consciousness in spite...John Allen Williams and David R. Segal, Chapter 2 (New York, NY: Oxford University Press, 2000),19-20. 44 Peter D. Feaver, Richard H. Kohn, and...Krista E. Wiegand and David L. Paletz, "The Elite Media and the Military-Civilian Culture Gap," Armed Forces and Society 27, no. 2 (Winter 2001): 189. 48

  12. DSTR/501-M62B Dynamic Interface Critical Speed Problem

    DTIC Science & Technology


    The speed reduction for the helicopter rotors is accomplished in the heli- copter transmission. Such a concept results in smaller diameter (lighter...coupling of the engine and drive shafting in the Dynamic System Test Rig (DSTR). This rig is an integrated rotor and drive shafting test vehicle for...showed that each major component of the drive train had acceptable rotor dynamic characteristics when analyzed separately. A more detailed coupled shafting

  13. Humboldt Bay Wetlands Review and Baylands Analysis. Volume II. Base Information.

    DTIC Science & Technology


    feet in the Salinas reservoir (McGarr and Vorhis , 1968). However, larger seiches have been generated at Hegben Lake, Montana, as a result of the 1954...the steep slopes. The soils are moderately well drained, and permeability is moderate to moderately slow. The native vegetation is redwood and Douglas ...moderately steep slopes. These include the Larabee, Empire, Hely, and Mendocino series. Rcdwood and Douglas fir forests are the native vegetation

  14. CMOS-Memristor Hybrid Nanoelectronics for AES Encryption

    DTIC Science & Technology


    URL: Products /Ultraviolet-325-nm-Medium-Frame-Unpolarized-Heli um- Cadmium -Laser-Systems.aspx 2. URL: http...the existing industry -standard CMOS integrated circuit manufacturing base. Our in-house facility development focused on establishing a very high...leveraging the well-proven vast functionality of the existing industry -standard CMOS integrated circuit manufacturing base. Maintaining compatibility

  15. Impact of Airfoils on Aerodynamic Optimization of Heavy Lift Rotorcraft

    DTIC Science & Technology


    Modeling Capability with a Conceptual Rotorcraft Sizing Code,” American Helicopter Society Vertical Lift Aircraft Design Conference, San Francisco...American Helicopter Society International, Inc. All rights reserved. Introduction A new generation of very large, fast rotorcraft is being studied to...Ref. 4). Other codes, including NASTRAN and HeliFoil, were used for subsystem analyses. Reference 1 discusses the integration of the various

  16. Warfare in the 21st Century. A Selected Bibliography

    DTIC Science & Technology


    Grier, Peter. "The Sensational Signal." (Global Positioning System) Air Force Magazine 86 (Feb- ruary 2003): 66-69. Harley , Jeff. "Space Control and...Life-Saving Heli- copters." Armed Forces Journal 140 (May 2003): 42-48. Cook, Nick . "Armed and Dangerous." (Unmanned Combat Aerial Vehicles) Jane’>. Internet. Accessed 19 May 2003. Lewer, Nick , ed. The Future of Non-lethal Weapons: Technologies

  17. Fortresses and Icebergs: The Evolution of the Transatlantic Defense Market and the Implications for U.S. National Security Policy. Volume 2: Country Studies

    DTIC Science & Technology


    Relations,Washington,DC 8. PERFORMING ORGANIZATION REPORT NUMBER 9. SPONSORING/ MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR’S ACRONYM(S...on specific engagement opportunities and perform market monitor - ing (e.g., Lockheed Martin, Raytheon and Northrop Grumman). Boeing probably has the...Eurocopter Tiger attack heli- copters. DGA selected Hellfire in June 2007, in large part because of the failure of the multinational Euromissile TriGAT-LR

  18. Interpretation of high-resolution low-altitude helicopter magnetometer surveys over sites contaminated with unexploded ordnance

    NASA Astrophysics Data System (ADS)

    Billings, Stephen; Wright, David


    Throughout the world, millions of acres of potentially productive land are contaminated with unexploded ordnance due to either past conflicts or to military training activities. Low-level helicopter magnetometry (HeliMag) is currently being used to rapidly survey large areas and identify regions that are potentially clear of hazardous munitions. One configuration currently in use comprises seven cesium vapor magnetometers, horizontally spaced 1.5 m apart and mounted on a boom several meters in front of a Bell 206L helicopter. Magnetometer data are collected at 400 Hz at altitudes as low as 1.5 m above the ground along transects spaced 7 meters apart. From this dense, high-resolution data, potential metallic targets as small as a 60 mm mortar are identified using manual and/or automatic target picking methods. The target picks are then used to estimate densities of potential contamination. 100% detection is generally not feasible, so that HeliMag is usually applied in a characterization rather than in a clearance mode. We describe a HeliMag survey collected over a UXO contaminated site at Yekau Lake, near Edmonton, Canada. The objective was to identify the location and extent of an 11.5 pound bomb target area at a former training range. The target density estimates derived from manual picks were strongly influenced by geology and clutter and did not reflect the underlying density of ordnance and ordnance related clutter. By fitting a dipole model to each target pick, and comparing it to the expected response of the target item, we could estimate the density of objects with similar size/shape to an 11.5 pound bomb. This analysis clearly identified an area of elevated contamination in the same region where 11.5 pound bombs were found during ground reconnaissance. In summary, the new methodology significantly improves the interpretability of HeliMag data when used for UXO site assessment.

  19. Assessing Automatic Aid as an Emergency Response Model

    DTIC Science & Technology


    children, Nicholas, Spencer , Kayla, and Krista: I appreciate your patience and understanding. I hope that I am a role model to you, proving that you...noted by all interview subjects and provides for the closest resource “without regard to the name on the door” as noted by Battalion Chief Matt Herbert ...states that he “expects to go to Alexandria or Fairfax everyday,”96 and Herbert expands on the close interaction by noting, “crews have dinner, drill

  20. Extracting Hydrogeology from Heliborne Dual Moment Transient Electromagnetic Investigation in Geologically Divergent Terrenes

    NASA Astrophysics Data System (ADS)

    Ahmed, S.; Chandra, S.; Auken, E.; Verma, S. K.


    Comprehensive knowledge of aquifer system is an important requisite for its effective management in India. Geological formations are complex and variable, punctual and scarce information are not adequate to understand, asses and manage them. Continuous data acquisition, their interpretation and integration with available geological/geophysical information is the solution. Heliborne dual moment transient electromagnetic (HeliTEM) and magnetic (HeliMAG) measurements have been carried out in divergent geological terrenes in India comprising Gangetic alluvium, Tertiary sediments underlying the Thar desert, Deccan basalts and Gondwana sediments, weathered and fractured granite gneisses and schists and the coastal alluvium with Tertiary sediments. The survey was carried out using state of the art equipment SkyTEM. The paper presents a synopsis of the results of the HeliTEM surveys that have helped in obtaining continuous information on the geoelectrical nature of sub-surface. HeliTEM data were supported by a number of ground geophysical surveys. The results provide the 3D subsurface structures controlling the groundwater conditions, the regional continuity of probable aquifers, the variations in lithological character and the quality of water in terms of salinity. Specialized features pertaining to hydrogeological characteristics obtained from this study are as follows:  A clear delineation of clay beds and their spatial distribution providing the multi-layered aquifer setup in the Gangetic plains.  Delineation of low resistivity zones in the quartzite below the over exploited aquifers indicating the possibility of new aquifers.  Presence of freshwater zones underneath the saline water aquifers in the thick and dry sands in deserts.  Clear demarcation of different lava flows, mapping the structural controls and highly porous zones in the contact of basalts and Gondwanas.  A complete and continuous mapping of weathered zone in crystalline hard rock areas

  1. Extracting Hydrogeology from Heliborne Dual Moment Transient Electromagnetic Investigations in Geologically Divergent Terrenes

    NASA Astrophysics Data System (ADS)

    Ahmed, S.; Chandra, S.; Auken, E.; Verma, S. K.


    Comprehensive knowledge of aquifer system is an important requisite for its effective management in India. Geological formations are complex and variable, punctual and scarce information are not adequate to understand, asses and manage them. Continuous data acquisition, their interpretation and integration with available geological/geophysical information is the solution. Heliborne dual moment transient electromagnetic (HeliTEM) and magnetic (HeliMAG) measurements have been carried out in divergent geological terrenes in India comprising Gangetic alluvium, Tertiary sediments underlying the Thar desert, Deccan basalts and Gondwana sediments, weathered and fractured granite gneisses and schists and the coastal alluvium with Tertiary sediments. The survey was carried out using state of the art equipment SkyTEM. The paper presents a synopsis of the results of the HeliTEM surveys that have helped in obtaining continuous information on the geoelectrical nature of sub-surface. HeliTEM data were supported by a number of ground geophysical surveys. The results provide the 3D subsurface structures controlling the groundwater conditions, the regional continuity of probable aquifers, the variations in lithological character and the quality of water in terms of salinity. Specialized features pertaining to hydrogeological characteristics obtained from this study are as follows: A clear delineation of clay beds and their spatial distribution providing the multi-layered aquifer setup in the Gangetic plains. Delineation of low resistivity zones in the quartzite below the over exploited aquifers indicating the possibility of new aquifers. Presence of freshwater zones underneath the saline water aquifers in the thick and dry sands in deserts. Clear demarcation of different lava flows, mapping the structural controls and highly porous zones in the contact of basalts and Gondwanas. A complete and continuous mapping of weathered zone in crystalline hard rock areas providing information

  2. The Traveling Wave Amplifier as a Bistable Oscillator

    DTIC Science & Technology


    the TWT has the property .that "the phase of the output relative to the input is a linear function of the length of helix employed and of helix ...Packard Company 12. Lee, Hon. C. 13. Lee, Hon. C. 14. Putz, John L. 15. Rowe, J.E. NEW BROADBAND MICROWAVE POWER AMPLIFIERS USING HELIX the inner helix . The coupling heliX is fitted into a sheath and spider designed to support the TWT . The sheath assembly forme a ground surface for

  3. Air & Space Power Journal. Volume 19, Number 1, Spring 2005

    DTIC Science & Technology


    SOF MH-53M Pave Low and Rescue HH-60G Pave Hawk helicopters can 1. fly at night using NVGs or a forward- looking infrared system, 2. defend...modified-contour low-level flight, 2. fly NVG air and land missions, 3. conduct NVG helicopter air refueling, 4. perform NVG airdrop of personnel and...transports. Rotary-wing squadrons use modified versions of the H-53 heli­ copter. Both platforms are showing their age; in­ deed, the helicopters have

  4. Vision-Based Precision Landings of a Tailsitter UAV

    DTIC Science & Technology


    this research was an off-the-shelf HeliMax CPv3 remote con- trolled (RC) helicopter shown in Figure 2.3. The helicopter has a 20.75 inch rotor span and...easy to see how this could lead to large position estimation errors. Dull black cloth was taped to the floor with black gaffing tape in an attempt to...use of a Kalman filter or extended Kalman filter. Infor- mation from optic flow sensed in the image frame, or from rate gyros and accelerometers from



    Noland, R.A.; Stone, C.C.


    A method is presented for joining sections of uranium rod which are clad in a corrosion-resistant material of higher melting point than uranium. The method includes the steps of preferentially- etching the uranium in the ends of the sections to be joined to depress the level of the uranium slighily below that of the cladding, bringing the ends to be joined together, applying axial pressure to the joint, and heli-arc welding the joint while rotating the joint, to fuse the cladding to a uniform depth of about 50% of the thickness of the cladding.

  6. Vortex-Induced Vibrations of Marine Cables and Structures.

    DTIC Science & Technology


    length of 130 m (425 ft) was resonantly excited by currents with magnitudes of 0.45 m/s (0.9 kt). In 1979 the jack-up rig " Offshore Mercury" was drilling ...a drill pipe deployed from the jack-up rig Ocean Monarch in the English Channel; from Every and King (8). A heli- cal strake vortex spoiler is...predict stress distributions and operational lifetimes in hostile ocean environments. This is largely because the amplitudes of vortex-induced vibration


    SciTech Connect



    As part of the 200-PO-1 Phase I geophysical surveys, Fugro Airborne Surveys was contracted to collect airborne electromagnetic (EM) and magnetic surveys of the Hanford Site 600 Area. Two helicopter survey systems were used with the HeliGEOTEM{reg_sign} time domain portion flown between June 19th and June 20th, 2008, and the RESOLVE{reg_sign} frequency domain portion was flown from June 29th to July 1st, 2008. Magnetic data were acquired contemporaneously with the electromagnetic surveys using a total-field cesium vapor magnetometer. Approximately 925 line kilometers (km) were flown using the HeliGEOTEM{reg_sign} II system and 412 line kilometers were flown using the RESOLVE{reg_sign} system. The HeliGEOTEM system has an effective penetration of roughly 250 meters into the ground and the RESOLVE system has an effective penetration of roughly 60 meters. Acquisition parameters and preliminary results are provided in SGW-39674, Airborne Electromagnetic Survey Report, 200-PO-1 Groundwater Operable Unit, 600 Area, Hanford Site. Airborne data are interpreted in this report in an attempt to identify areas of likely preferential groundwater flow within the aquifer system based on the presence of paleochannels or fault zones. The premise for the interpretation is that coarser-grained intervals have filled in scour channels created by episodic catastrophic flood events during the late Pleistocene. The interpretation strategy used the magnetic field anomaly data and existing bedrock maps to identify likely fault or lineament zones. Combined analysis of the magnetic, 60-Hz noise monitor, and flight-altitude (radar) data were used to identify zones where EM response is more likely due to cultural interference and or bedrock structures. Cross-sectional and map view presentations of the EM data were used to identify more electrically resistive zones that likely correlate with coarser-grained intervals. The resulting interpretation identifies one major northwest-southeast trending

  8. From golden hills to sycamore trees: pastoral homelands and ethnic identity in Irish immigrant fiction, 1860-75.


    Corporaal, Marguérite


    The prose fiction that remembers the trials of starvation and eviction of the Great Famine (1845-50) often juxtaposes representations of blasted, infertile land with images of a green, idyllic Erin. Through a discussion of Mary Anne Sadlier's Bessy Conway (1861), Elizabeth Hely Walshe's Golden Hills: A Tale of the Irish Famine (1865) and John McElgun's Annie Reilly (1873), this article reveals that immigrant writers of the Famine generation often negotiate depictions of Famine-stricken wasteland with evocations of a pastoral homeland. In the case of the two Catholic novels, Bessy Conway and Annie Reilly, the pastoral becomes a point of ethnic identification through which the immigrants can recollect and reconstruct a sense of Irishness in exile. By contrast, Golden Hills, which focuses on the Anglo-Irish ascendancy, does not lament the mass exodus of afflicted Irish: the novel rather envisions emigration as a way to regenerate Ireland as locus amoenus.

  9. A reappraisal of the controversy of Dax and Broca.


    Cubelli, R; Montagna, C G


    Paul Broca is unanimously recognized as the founder of neuropsychology. Helis development of the scientific method to map mental functions onto brain topographpy has been enormously influential. Nevertheless, Dax's paper on the left hemisphere dominance for speech was written and published before Broca explicitely proposed the same theory. Probably, Broca was aware of the paper prior to 1865, but he never acknowledged Dax's original theoretical contribution. On the contrary, he always claimed to be the first to espouse the theory of left hemisphere dominance for language and never quoted Marc Dax (Broca, 1877 p 536), 'I do not like dealing with the questions of priority concerning myself. That is the reason why I did not mention the name of Dax in my paper'. In our opinion, the weight of evidence reported here suggests that the theory of the left hemisphere dominance for speech must be attributed equally to Dax and Broca, and henceforth should be called 'the theory of Dax-Broca'.

  10. Evaluation of advanced airship concepts

    NASA Technical Reports Server (NTRS)

    Joner, B. A.; Schneider, J. J.


    A historical overview of the airship, technical and operational characteristics of conventional and hybrid concepts, and the results of a parametric design analysis and evaluation are presented. The lift capabilities of certain buoyant fluids for a hypothetical 16 million cu.ft. volume airship are compared. The potential advanced airship concepts are surveyed, followed by a discussion of the six configurations: conventional nonrigid, conventional rigid, Deltoid (Dynairship), Guppoid (Megalifter), Helipsoid, and Heli-Stat. It is suggested that a partially buoyant Helipsoid concept of the optimum buoyancy ratio has the potential to solve the problems facing future airship development, such as Ballast and Ballast Recovery System, Full Low-Speed Controllability, Susceptibility to Wind/Gusting, Weather/Icing Constraints, Ground Handling/Hangaring, and Direct/Indirect Operating Costs.

  11. Flow Rate In Microfluidic Pumps As A Function Of Tension and Pump Motor Head Speed

    NASA Astrophysics Data System (ADS)

    Irwin, Anthony; McBride, Krista


    As the use of microfluidic devices has become more common in recent years the need for standardization within the pump systems has grown. The pumps are ball bearing rotor microfluidic pumps and work off the idea of peristalsis. The rapid contraction and relaxation propagating down a tube or a microfluidic channel. The ball bearings compress the tube (occlusion) and move along part of the tube length forcing fluid to move inside of the tube in the same direction of the ball bearings. When the ball bearing rolls off the area occupied by the microfluidic channel, its walls and ceiling undergo restitution and a pocket of low pressure is briefly formed pulling more of the liquid into the pump system. Before looking to standardize the pump systems it must be known how the tension placed by the pumps bearing heads onto the PDMS inserts channels affect the pumps performance (mainly the flow rate produced). The relationship of the speed at which the bearings on the motor head spin and the flow rate must also be established. This research produced calibration curves for flow rate vs. tension and rpm. These calibration curves allow the devices to be set to optimal user settings by simply varying either the motor head tension or the motor head speed. I would like to acknowledge the help and support of Vanderbilt University SyBBURE program, Christina Marasco, Stacy Sherod, Franck Block and Krista McBride.

  12. High energy density capacitors for vacuum operation with a pulsed plasma load

    NASA Technical Reports Server (NTRS)

    Guman, W. J.


    Results of the effort of designing, fabricating, and testing of a 40 joules/lb (88.2 joules/Kg) high voltage energy storage capacitor suitable for operating a pulsed plasma thruster in a vacuum environment for millions of pulses are presented. Using vacuum brazing and heli-arc welding techniques followed by vacuum and high pressure helium leak tests it was possible to produce a hermetically sealed relatively light weight enclosure for the dielectric system. An energy density of 40 joules/lb was realized with a KF-polyvinylidene fluoride dielectric system. One capacitor was D.C. life tested at 4 KV (107.8 joules/lb) for 2,000 hours before it failed. Another exceeded 2,670 hours without failure at 38.3 joules/lb. Pulse life testing in a vacuum exceeded 300,000 discharges with testing still in progress. The D.C. life test data shows a small decrease in capacitance and an increase in dissipation factor with time. Heat transfer from the load to the capacitor must also be considered besides the self-heat generated by the capacitor.

  13. Radiative association of He(23P) with lithium cations: Π → Σ processes

    NASA Astrophysics Data System (ADS)

    Zámečníková, Martina; Kraemer, Wolfgang P.; Soldán, Pavel


    The radiative association processes originating in the 13 Π continuum of the He (23 P) +Li+ collisional system are investigated in this study. The calculations of the dynamic collision processes are based on highly accurate state-of-the-art ab initio calculations of the potential energy functions for the 13 Π and the three lowest 3Σ states of HeLi+ and the associated transition dipole-moment functions. Cross-sections for the spontaneous and stimulated radiative association processes are calculated as functions of collision energy. The corresponding rate coefficients characterizing the efficiency of the formation of the molecular ion in its a3Σ+ , b3Σ+ , and c3Σ+ states from the initial 13 Π state are obtained over a wide range of temperatures. At very low temperatures the 1 → b process has a maximum rate-coefficient value of about 7.9 ×10-13cm3s-1 , whereas process 1 → a reaches its maximum value of 2.0 ×10-13cm3s-1 at a temperature of about 500 K. Altogether the three radiative association processes investigated here can be considered as the continuum-to-bound state radiative transition part of the total quenching of the initial collision channel.

  14. Formation processes of floe size distribution in the marginal ice zone (Invited)

    NASA Astrophysics Data System (ADS)

    Toyota, T.; Kohout, A.; Fraser, A.


    Since the marginal ice zone (MIZ) is the outer sea ice zone, its behavior is key to the understanding of the variability of sea ice extent associated with climate change. Especially for the melting processes in MIZ, where relatively small ice floes are dominant, floe size distribution (FSD) is an important parameter because smaller ice floes are subject to stronger lateral melting due to their larger cumulative perimeters. As the MIZ is characterized by vigorous interaction between sea ice and waves, breakup of sea ice due to flexural forcing and collisions is considered to play an essential role in the determination of FSD there. However, the available data have been very limited so far. Analysis of the observations of ice floes with a heli-borne video camera, focusing on the floe size ranging from 2 m to 100 m, in the Sea of Okhotsk, the Weddell Sea and off East Antarctica, revealed that while FSD is basically scale-invariant, a regime shift occurs at a size of about a few tens of meters, irrespective of the study region. It was also shown 1) that the floe size at which regime shift occurs slightly increases from 20 to 40 m with ice thickness, consistent with the theory of the flexural failure of sea ice; and 2) that to explain the scale invariance in FSD for smaller floes, a fragility of sea ice which is relevant to the strength of sea ice relative to waves can be a useful physical parameter to be correlated with the fractal dimension. Thus these results confirm the importance of wave-ice interaction to the formation of FSD. Based on this, a possible mechanism of the melting process was hypothesized that in the melting season sea ice extent retreats keeping the FSD relative to the ice edge nearly constant. As a next step and to confirm and further investigate this result, we planned to conduct the concurrent measurements of FSD, wave activities, and ice thickness off East Antarctica during the Sea Ice Physics and Ecosystem Experiment 2 (SIPEX2) in September to

  15. Environmental Public Health Surveillance for Exposure to Respiratory Health Hazards: A Joint NASA/CDC Project to Use Remote Sensing Data for Estimating Airborne Particulate Matter Over the Atlanta, Georgia Metropolitan Area

    NASA Technical Reports Server (NTRS)

    Quattrochi, Dale A.; Al-Hamdan, Mohammad; Estes, Maurice; Crosson, William


    As part of the National Environmental Public Health Tracking Network (EPHTN) the National Center for Environmental Health (NCEH) at the Centers for Disease Control and Prevention (CDC) is leading a project called Health and Environment Linked for Information Exchange (HELiX-Atlanta). The goal of developing the National Environmental Public Health Tracking Network is to improve the health of communities. Currently, few systems exist at the state or national level to concurrently track many of the exposures and health effects that might be associated with environmental hazards. An additional challenge is estimating exposure to environmental hazards such as particulate matter whose aerodynamic diameter is less than or equal to 2.5 micrometers (PM2.5). HELIX-Atlanta's goal is to examine the feasibility of building an integrated electronic health and environmental data network in five counties of Metropolitan Atlanta, GA. NASA Marshall Space Flight Center (NASA/MSFC) is collaborating with CDC to combine NASA earth science satellite observations related to air quality and environmental monitoring data to model surface estimates of PM2.5 concentrations that can be linked with clinic visits for asthma. While use of the Air Quality System (AQS) PM2.5 data alone could meet HELIX-Atlanta specifications, there are only five AQS sites in the Atlanta area, thus the spatial coverage is not ideal. We are using NASA Moderate Resolution Imaging Spectroradiometer (MODIS) satellite Aerosol Optical Depth (AOD) data for estimating daily ground level PM2.5 at 10 km resolution over the metropolitan Atlanta area supplementing the AQS ground observations and filling their spatial and temporal gaps.

  16. True single-molecule DNA sequencing of a pleistocene horse bone

    PubMed Central

    Orlando, Ludovic; Ginolhac, Aurelien; Raghavan, Maanasa; Vilstrup, Julia; Rasmussen, Morten; Magnussen, Kim; Steinmann, Kathleen E.; Kapranov, Philipp; Thompson, John F.; Zazula, Grant; Froese, Duane; Moltke, Ida; Shapiro, Beth; Hofreiter, Michael; Al-Rasheid, Khaled A.S.; Gilbert, M. Thomas P.; Willerslev, Eske


    Second-generation sequencing platforms have revolutionized the field of ancient DNA, opening access to complete genomes of past individuals and extinct species. However, these platforms are dependent on library construction and amplification steps that may result in sequences that do not reflect the original DNA template composition. This is particularly true for ancient DNA, where templates have undergone extensive damage post-mortem. Here, we report the results of the first “true single molecule sequencing” of ancient DNA. We generated 115.9 Mb and 76.9 Mb of DNA sequences from a permafrost-preserved Pleistocene horse bone using the Helicos HeliScope and Illumina GAIIx platforms, respectively. We find that the percentage of endogenous DNA sequences derived from the horse is higher among the Helicos data than Illumina data. This result indicates that the molecular biology tools used to generate sequencing libraries of ancient DNA molecules, as required for second-generation sequencing, introduce biases into the data that reduce the efficiency of the sequencing process and limit our ability to fully explore the molecular complexity of ancient DNA extracts. We demonstrate that simple modifications to the standard Helicos DNA template preparation protocol further increase the proportion of horse DNA for this sample by threefold. Comparison of Helicos-specific biases and sequence errors in modern DNA with those in ancient DNA also reveals extensive cytosine deamination damage at the 3′ ends of ancient templates, indicating the presence of 3′-sequence overhangs. Our results suggest that paleogenomes could be sequenced in an unprecedented manner by combining current second- and third-generation sequencing approaches. PMID:21803858

  17. Formation processes of sea ice floe size distribution in the interior pack and its relationship to the marginal ice zone off East Antarctica

    NASA Astrophysics Data System (ADS)

    Toyota, Takenobu; Kohout, Alison; Fraser, Alexander D.


    To understand the behavior of the Seasonal Ice Zone (SIZ), which is composed of sea-ice floes of various sizes, knowledge of the floe size distribution (FSD) is important. In particular, FSD in the Marginal Ice Zone (MIZ), controlled by wave-ice interaction, plays an important role in determining the retreating rates of sea-ice extent on a global scale because the cumulative perimeter of floes enhances melting. To improve the understanding of wave-ice interaction and subsequent effects on FSD in the MIZ, FSD measurements were conducted off East Antarctica during the second Sea Ice Physics and Ecosystems eXperiment (SIPEX-2) in late winter 2012. Since logistical reasons limited helicopter operations to two interior ice regions, FSD in the interior ice region was determined using a combination of heli-photos and MODIS satellite visible images. The possible effect of wave-ice interaction in the MIZ was examined by comparison with past results obtained in the same MIZ, with our analysis showing: (1) FSD in the interior ice region is basically scale invariant for both small- (<100 m) and large- (>1 km) scale regimes; (2) although fractal dimensions are quite different between these two regimes, they are both rather close to that in the MIZ; and (3) for floes <100 m in diameter, a regime shift which appeared at 20-40 m in the MIZ is absent. These results indicate that one role of wave-ice interaction is to modulate the FSD that already exists in the interior ice region, rather than directly determine it. The possibilities of floe-floe collisions and storm-induced lead formation are considered as possible formation processes of FSD in the interior pack.


    SciTech Connect



    Airborne electromagnetic (AEM) surveys were flown during fiscal year (FY) 2008 within the 600 Area in an attempt to characterize the underlying subsurface and to aid in the closure and remediation design study goals for the 200-PO-1 Groundwater Operable Unit (OU). The rationale for using the AEM surveys was that airborne surveys can cover large areas rapidly at relatively low costs with minimal cultural impact, and observed geo-electrical anomalies could be correlated with important subsurface geologic and hydrogeologic features. Initial interpretation of the AEM surveys indicated a tenuous correlation with the underlying geology, from which several anomalous zones likely associated with channels/erosional features incised into the Ringold units were identified near the River Corridor. Preliminary modeling resulted in a slightly improved correlation but revealed that more information was required to constrain the modeling (SGW-39674, Airborne Electromagnetic Survey Report, 200-PO-1 Groundwater Operable Unit, 600 Area, Hanford Site). Both time-and frequency domain AEM surveys were collected with the densest coverage occurring adjacent to the Columbia River Corridor. Time domain surveys targeted deeper subsurface features (e.g., top-of-basalt) and were acquired using the HeliGEOTEM{reg_sign} system along north-south flight lines with a nominal 400 m (1,312 ft) spacing. The frequency domain RESOLVE system acquired electromagnetic (EM) data along tighter spaced (100 m [328 ft] and 200 m [656 ft]) north-south profiles in the eastern fifth of the 200-PO-1 Groundwater OU (immediately adjacent to the River Corridor). The overall goal of this study is to provide further quantification of the AEM survey results, using ground based geophysical methods, and to link results to the underlying geology and/or hydrogeology. Specific goals of this project are as follows: (1) Test ground based geophysical techniques for the efficacy in delineating underlying geology; (2) Use ground

  19. [Trocar site herniation (TSH) following laparoscopic cholecystectomy: incidence, pathogenesis, and prevention -- animal study].


    Gamal, Eldin Mohamed; Szabó, Györgyi; Metzger, Péter; Furka, István; Mikó, Irén; Pető, Katalin; Ferencz, Andrea; Sándor, József; Szentkereszty, Zsolt; Sápi, Péter; Wéber, György


    Bevezetés/célkitűzés: 1968-ban R. E. Fear először közölt tanulmányt a laparoscopos „Port site” herniáról (Trocar site hernia, TSH), jelenlegi előfordulási gyakorisága eléri a 0,65–2,80%-ot. A sebészi laparoscopia elterjedésével a beavatkozások során szokássá vált, hogy a 10 mm-nél kisebb trokársebeket nem zárják be. Ugyanakkor egyre több közlemény foglalkozik az 5-6 mm-es trokár (továbbiakban: KT) helyén keletkező sérvek elzáródásával. Anyag és módszer: A szerzők oktatási célból 60 kutyán végzett laparoscopos cholecystectomia műtét után 2 és 4 héttel relaparoscopiát végeztek, és posztoperatív adhaesiók után kutatva azt is figyelték, hogy a laparoscopos trokárok intraabdominalis behatolási helyein vannak-e sérvek, különös tekintettel a KT-ra. Eredmények: A 60 kísérleti állat 20%-ában volt látható intraabdominalis sérv, és a sérvek 70%-a a KT helyein helyezkedett el. Következtetések: A megszokott gyakorlattal ellentétben az irodalomban egyre többen hangoztatják a nagy trokárok és a KT ejtette teljes vastagságú hasfali sebek zárásának szükségességét, megelőzendő a sérvek kialakulását és kizáródásuk lehetőségét. Tanulmányunkban a technikai és klinikai lehetőségeket mutatjuk be.

  20. Blind Geothermal System Exploration in Active Volcanic Environments; Multi-phase Geophysical and Geochemical Surveys in Overt and Subtle Volcanic Systems, Hawai’i and Maui

    SciTech Connect

    Fercho, Steven; Owens, Lara; Walsh, Patrick; Drakos, Peter; Martini, Brigette; Lewicki, Jennifer L.; Kennedy, Burton M.


    Suites of new geophysical and geochemical exploration surveys were conducted to provide evidence for geothermal resource at the Haleakala Southwest Rift Zone (HSWRZ) on Maui Island, Hawai’i. Ground-based gravity (~400 stations) coupled with heli-bourne magnetics (~1500 line kilometers) define both deep and shallow fractures/faults, while also delineating potentially widespread subsurface hydrothermal alteration on the lower flanks (below approximately 1800 feet a.s.l.). Multi-level, upward continuation calculations and 2-D gravity and magnetic modeling provide information on source depths, but lack of lithologic information leaves ambiguity in the estimates. Additionally, several well-defined gravity lows (possibly vent zones) lie coincident with magnetic highs suggesting the presence of dike intrusions at depth which may represent a potentially young source of heat. Soil CO2 fluxes were measured along transects across geophysically-defined faults and fractures as well as young cinder cones along the HSWRZ. This survey generally did not detect CO2 levels above background, with the exception of a weak anomalous flux signal over one young cinder cone. The general lack of observed CO2 flux signals on the HSWRZ is likely due to a combination of lower magmatic CO2 fluxes and relatively high biogenic surface CO2 fluxes which mix with the magmatic signal. Similar surveys at the Puna geothermal field on the Kilauea Lower East Rift Zone (KLERZ) also showed a lack of surface CO2 flux signals, however aqueous geochemistry indicated contribution of magmatic CO2 and He to shallow groundwater here. As magma has been intercepted in geothermal drilling at the Puna field, the lack of measured surface CO2 flux indicative of upflow of magmatic fluids here is likely due to effective “scrubbing” by high groundwater and a mature hydrothermal system. Dissolved inorganic carbon (DIC) concentrations, δ13C compositions and 3He/4He values were sampled at Maui from several shallow

  1. HD gas purification for polarized HDice targets production at Jefferson Lab

    SciTech Connect

    Whisnant, Charles; D'Angelo, Annalisa; Colaneri, Luca; Devilbiss, J; Kageya, Tsuneo; Loving, D A; Lowry, Michael; Rizzo, Alessandro; Sandorfi, Andrew; Schaerf, Carlo; Storey, J D; Wallace, C M; Wei, Xiangdong; Zonta, Irene


    Solid, frozen-spin targets of molecular HD were rst developed for nuclear physics by a collaboration between Syracuse University and Brookhaven National Lab. They have been successfully used in measurements with photon beams, rst at the Laser-Electron-Gamma-Source [1] and most recently at Je erson Lab during the running of the E06-101 (g14) experiment [2]. Preparations are underway to utilize the targets in future electron experiments after the completion of the 12 GeV JLab upgrade [3]. HD is an attractive target since all of the material is polarizable, of low Z, and requires only modest holding elds. At the same time, the small contributions from the target cell can be subtracted from direct measurements. Reaching the frozen-spin state with both high polarization and a signi cant spin relaxation time requires careful control of H2 and D2 impurities. Commercially available HD contains 0.5 - 2% concentrations of H2 and D2. Low-temperature distillation is required to reduce these concentrations to the 104 level to enable useful target production. This distillation is done using a column lled with heli-pack C [4] to give good separation e ciency. Approximately 12 moles of commercial HD is condensed into the mechanically refrigerated system at the base temperature of 11K. The system is then isolated and the temperature stabilized at 18K producing liquid HD, which is boiled by a resistive heater. The circulation established by the boil-o condensing throughout the column then ltering back down produces a steady-state isotopic separation permitting the extraction of HD gas with very low H2 and D2 content. A residual gas analyzer initially monitors distillation. Once the H2 concentration falls below its useful operating range, samples are periodically collected for analysis using gas chromatography [5] and Raman scattering. Where the measurement techniques overlap, good agreement is obtained. The operation of the distillery and results of gas analysis will be discussed

  2. DTMs: discussion of a new multi-resolution function based model

    NASA Astrophysics Data System (ADS)

    Brovelli, M. A.; Biagi, L.; Zamboni, G.


    transmitted to the clients. These data allow the complete reconstruction of the terrain at any point. A preliminary implementation of the algorithm had been already presented: however, some optimization problems were present in the automatic choice of the activated splines. Now, all these problems have been solved and the algorithm has been completely implemented. In the presentation, the new multi-resolution approach is discussed and compared with the traditional techniques to interpolate, store and transmit DTMs, considering accuracy and storage requirements. Moreover it is compared with other multi-resolution techniques. Different case studies of smooth and rough terrains have been analyzed: the results provided by our approach are completely satisfactory. The research has been funded by the INTERREG HELI-DEM (Helvetia Italy Digital Elevation Model) project.

  3. [Pliability and deflection of diagnostic catheters].


    Pelyhe, Liza; Bognár, Eszter


    Bevezetés: A szívkatéter olyan intravascularis katéter, amelyet a szívbe vezetnek vagy ültetnek be diagnosztikus vagy terápiás célból. A katéterek felvezetés/eltávolítás közben megtörhetnek vagy eltörhetnek. Célkitűzés: A szerzők két azonos alapanyagú, de különböző átmérőjű katéter hajlékonyságának meghatározását tűzték ki célul a Food and Drug Administration ajánlása alapján. Módszer: Meghatározták a hajlítási pontokat, a pontokon az átmérőcsökkenést, az elhajlás változását, továbbá e két paraméter csúcstól mért távolságának függését, korrelációjukat és a katéter kezdeti átmérőjének hatását. A katétereket 9-9 ponton (120–280 mm-re a páciensbe bevezetett végtől 20 mm-ként), 16 különböző sugarú idomszeren hajlították meg, amelyek sugara 10 mm-től 2,5 mm-ig 0,5 mm-ként csökkent. Eredmények: Megállapították, hogy az átmérőcsökkenés és az elhajlás lineárisan korrelál egymással, és függetlenek a mérési pont helyétől mindkét katéter esetében. A nagyobb átmérőjű katéternél szignifikánsan (p = 0,05) nagyobb volt az átmérőcsökkenés, mint a kisebbnél, de az átmérőcsökkenés és az elhajlási görbék lefutása hasonló. Következtetések: Az alkalmazott módszer alkalmasnak tűnik az adott típusú katéterek lehetséges gyenge pontjainak vizsgálatára. Orv. Hetil., 2014, 155(39), 1544–1548.

  4. Post-Cretaceous Sinistral Transpression in Southwest Alxa: Structural and Paleomagnetic Insights into the Long-Term Slip History of the Altyn Tagh Fault

    NASA Astrophysics Data System (ADS)

    Shumaker, L.; Lippert, P. C.; Darby, B. J.; Ritts, B. D.; Coe, R. S.


    Piercing point studies demonstrate two distinct phases of slip on the Altyn Tagh Fault (ATF) following its initiation ~30 Ma. An initial rapid, large magnitude slip phase transitioned to the present slower, smaller slip phase during the Middle Miocene. Piercing point studies near the Modern NE tip of the ATF, the Neogene shortening and cooling record of the Qilian Shan, and the slip history of faults within the Qilian Shan suggest that the >310 km of pre-Middle Miocene ATF displacement was transferred northeast into the Alxa block. Indeed, recent field mapping revealed numerous NE-SW trending sinistral strike-slip faults showing large Cretaceous and minimal Neogene offsets. These structures may have been kinematically linked to the ATF. We test this proposed linkage with new structural and paleomagnetic data from the Hei Shan, the Alxa range closest to the Modern terminus of the ATF. An ENE-WSW trending sub-vertical fault, which we call the Hei Shan Fault (HSF), can be traced WSW toward the ATF and ESE toward sinistral structures in the Heli and Beida Shan. Paleozoic and Mesozoic strata show left-lateral offset along the HSF, supported by slickenlines and S-C fabrics in the ~30m-thick gouge zone. At least nine fault-bound blocks of Paleozoic basement define a strike-slip duplex along the eastern HSF. Several NW-SE trending thrusts and folds that involve basement and Cretaceous strata occur north and south of the HSF. In the western Hei Shan, minor NE-SW trending strike-slip faults display small (tens of meters) dextral displacements. All of these structures appear to be kinematically linked to the HSF. Upper Neogene alluvial gravels show only minor offset and tilting by the HSF and these secondary structures. Paleomagnetic directions from more than 230 samples from 36 new Hei Shan sampling sites demonstrate that significant vertical axis rotations (relative to a stable Eurasia reference frame) occur only within the fault zones and that block rotations adjacent to

  5. Self-organization in magnetic flux ropes

    NASA Astrophysics Data System (ADS)

    Lukin, Vyacheslav S.


    This cross-disciplinary special issue on 'Self-organization in magnetic flux ropes' follows in the footsteps of another collection of manuscripts dedicated to the subject of magnetic flux ropes, a volume on 'Physics of magnetic flux ropes' published in the American Geophysical Union's Geophysical Monograph Series in 1990 [1]. Twenty-four years later, this special issue, composed of invited original contributions highlighting ongoing research on the physics of magnetic flux ropes in astrophysical, space and laboratory plasmas, can be considered an update on our state of understanding of this fundamental constituent of any magnetized plasma. Furthermore, by inviting contributions from research groups focused on the study of the origins and properties of magnetic flux ropes in a variety of different environments, we have attempted to underline both the diversity of and the commonalities among magnetic flux ropes throughout the solar system and, indeed, the universe. So, what is a magnetic flux rope? The answer will undoubtedly depend on whom you ask. A flux rope can be as narrow as a few Larmor radii and as wide as the Sun (see, e.g., the contributions by Heli Hietala et al and by Angelous Vourlidas). As described below by Ward Manchester IV et al , they can stretch from the Sun to the Earth in the form of interplanetary coronal mass ejections. Or, as in the Swarthmore Spheromak Experiment described by David Schaffner et al , they can fit into a meter-long laboratory device tended by college students. They can be helical and line-tied (see, e.g., Walter Gekelman et al or J Sears et al ), or toroidal and periodic (see, e.g., John O'Bryan et al or Philippa Browning et al ). They can form in the low plasma beta environment of the solar corona (Tibor Török et al ), the order unity beta plasmas of the solar wind (Stefan Eriksson et al ) and the plasma pressure dominated stellar convection zones (Nicholas Nelson and Mark Miesch). In this special issue, Setthivoine You

  6. Airborne imaging for heritage documentation using the Fotokite tethered flying camera

    NASA Astrophysics Data System (ADS)

    Verhoeven, Geert; Lupashin, Sergei; Briese, Christian; Doneus, Michael


    Since the beginning of aerial photography, researchers used all kinds of devices (from pigeons, kites, poles, and balloons to rockets) to take still cameras aloft and remotely gather aerial imagery. To date, many of these unmanned devices are still used for what has been referred to as Low-Altitude Aerial Photography or LAAP. In addition to these more traditional camera platforms, radio-controlled (multi-)copter platforms have recently added a new aspect to LAAP. Although model airplanes have been around for several decades, the decreasing cost, increasing functionality and stability of ready-to-fly multi-copter systems has proliferated their use among non-hobbyists. As such, they became a very popular tool for aerial imaging. The overwhelming amount of currently available brands and types (heli-, dual-, tri-, quad-, hexa-, octo-, dodeca-, deca-hexa and deca-octocopters), together with the wide variety of navigation options (e.g. altitude and position hold, waypoint flight) and camera mounts indicate that these platforms are here to stay for some time. Given the multitude of still camera types and the image quality they are currently capable of, endless combinations of low- and high-cost LAAP solutions are available. In addition, LAAP allows for the exploitation of new imaging techniques, as it is often only a matter of lifting the appropriate device (e.g. video cameras, thermal frame imagers, hyperspectral line sensors). Archaeologists were among the first to adopt this technology, as it provided them with a means to easily acquire essential data from a unique point of view, whether for simple illustration purposes of standing historic structures or to compute three-dimensional (3D) models and orthophotographs from excavation areas. However, even very cheap multi-copters models require certain skills to pilot them safely. Additionally, malfunction or overconfidence might lift these devices to altitudes where they can interfere with manned aircrafts. As such, the

  7. Modelo de atmosfera solar ajustado às observações do raio solar em 17GHz

    NASA Astrophysics Data System (ADS)

    Selhorst, C. L.; Silva, A. V. R.; Costa, J. E. R.


    O estudo das variações do raio solar durante o ciclo de atividades do Sol e das diferenças em relação à sua distribuição angular nos fornece informações importantes sobre as mudanças na estrutura da atmosfera solar. Neste trabalho foram analisados mais de 3600 mapas do Sol em 17 GHz obtidos pelo Rádio Heliógrafo de Nobeyama (NoRH), durante 1 ciclo de atividade solar (1992-2003). O raio solar foi definido no ponto onde a temperatura de brilho do mapa era equivalente à metade da temperatura do Sol calmo (temperatura mais comum no mapa).Em relação à sua variação ao longo do ciclo solar, o estudo foi dividido em duas partes: a) ajuste de uma circunferência a pontos distribuídos ao redor do Sol todo. Este estudo mostrou uma variação correlacionada com o ciclo de atividade do Sol. b) ajuste da circunferência a pontos situados somente nas regiões polares. Neste caso os resultados mostraram que o raio polar sofre pouca variação durante o ciclo, com tendência à anticorrelação com este. Além disto, a média do raio polar, durante o período analisado, foi 1" menor que o raio medido no Sol todo. Para estudar a distribuição angular do raio solar, comparamos a média da distribuição de 10 mapas no período de mínima atividade solar com a média de 10 mapas no período de máximo, este estudo mostrou um grande aumento do raio na região equatorial no período de máxima atividade solar. As medidas do raio foram usadas como um dos parâmetros para a criação de um modelo atmosférico (além da temperatura de brilho do Sol e do abrilhantamento do limbo observado), onde mostramos que um modelo atmosférico com a região de transição situada a 3500 km fornece um raio 5" menor que as medidas observacionais. Esta incompatibilidade do modelo com os dados observacionais foi contornada com a inclusão de espículas, estas fazem com que o raio solar aumente proporcionalmente à altura que estas atingem na atmosfera solar. A anticorrelação do raio