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Sample records for al gore arrive

  1. Al Gore attends Fall Meeting session on Earth observing satellite

    NASA Astrophysics Data System (ADS)

    Richman, Barbara T.

    2011-12-01

    Former U.S. vice president Al Gore, making unscheduled remarks at an AGU Fall Meeting session, said, "The reason you see so many pictures" of the Deep Space Climate Observatory (DSCOVR) satellite at this session is "that it already has been built." However, "because one of its primary missions was to help document global warming, it was canceled. So for those who are interested in struggling against political influence," Gore said, "the benefits have been documented well here." Gore made his comments after the third oral presentation at the 8 December session entitled "Earth Observations From the L1 (Lagrangian Point No. 1)," which focused on the capabilities of and progress on refurbishing DSCOVR. The satellite, formerly called Triana, had been proposed by Gore in 1998 to collect climate data. Although Triana was built, it was never launched: Congress mandated that before the satellite could be sent into space the National Academies of Science needed to confirm that the science it would be doing was worthwhile. By the time the scientific validation was complete, the satellite "was no longer compatible with the space shuttle manifest," Robert C. Smith, program manager for strategic integration at the NASA Goddard Space Flight Center, told Eos.

  2. Student Town Meeting with Vice President Al Gore. Teacher's Guide.

    ERIC Educational Resources Information Center

    Edwards, Amy N.

    This teacher's guide accompanies a videotape of the same name. Vice President Albert Gore, Jr., discusses current issues with students who question Mr. Gore on such topics as the environment, reinventing government, voter participation, crime, and the United States' role in foreign affairs. Gore tailors his answers to the teenage audience as the…

  3. The Gore/Bush Records on Higher Education.

    ERIC Educational Resources Information Center

    Walters, Ronald

    2000-01-01

    Compares the records of presidential candidates George W. Bush and Al Gore on higher education issues and, specifically, those of interest to the Black community. Concludes that Al Gore's record makes him an overall better choice in the 2000 campaign. (DB)

  4. Gore proposes green strategy

    SciTech Connect

    1995-04-26

    A national environmental technology strategy laying out incentives for developing and using {open_quotes}green{close_quotes} technology was announced last week by Vice President Al Gore. The plan proposes a national goal of cutting waste 40%-50% and using 20%-25% less materials/unit of gross domestic product by Earth Day 2020. To meet that goal, the federal government aims to streamline environmental permitting, provide federal sites where US firms can test and demonstrate new technologies, create flexible regulation that encourages efficient and effective technologies, encourage research on pollution prevention, and improve monitoring data and information systems. The Administration says environmental technology is providing job growth twice that of the economy as a whole, and global markets are expected to rise from $300 billion to $500 billion by 2000. It adds that the US is the world market leader but only by a slim- and slipping-margin. Whereas previous federal support for environmental technologies focused on the front end of R&D and prototyping, the new strategy aims to bring technologies to market and encourage exports, according to the Administration`s National Commission for Employment Policy, which issued two reports last week. The commission says federal environmental policies now produce 68,000-80,000 jobs and contribute $3.5 billion-$3.7 billion to the economy.

  5. Bush and Gore Focus on Schools.

    ERIC Educational Resources Information Center

    Joiner, Lottie L.

    2000-01-01

    In the 2000 presidential race, education seems a top priority for Vice-President Al Gore and Texas Governor George W. Bush. Although both candidates are promising billions of federal-aid dollars to raise standards, many believe they are ignoring factors such as student motivation and funding inequities. (MLH)

  6. Election 2000: The Keys Point to Gore.

    ERIC Educational Resources Information Center

    Lichtman, Allan J.

    2000-01-01

    Asserts that Vice President Al Gore will be elected in 2000 based on the performance of the Clinton administration. Utilizes the key to the White House, 13 true-or-false diagnostic questions stated as propositions. If five or less are false then the party in power wins. (CMK)

  7. Gore's Controversial Priorities for Higher Education.

    ERIC Educational Resources Information Center

    Gose, Ben

    2000-01-01

    Evaluates presidential candidate Al Gore's priorities for higher education, noting criticism by some educators of his emphasis on benefits for the middle class and the large number of specific proposals he has offered, including the College Opportunity Tax Cut, 21st Century Teachers' Corps, 401(j) Educational Savings Accounts, the National Tuition…

  8. Development of Aluminum-Lithium 2195 Gores by the Stretch Forming Process

    NASA Technical Reports Server (NTRS)

    Volz, M. P.; Chen, P. S.; Gorti, S.; Salvail, P.

    2014-01-01

    Aluminum-Lithium alloy 2195 exhibits higher mechanical properties and lower density than aluminum alloy 2219, which is the current baseline material for Space Launch System (SLS) cryogenic tank components. Replacement of Al 2219 with Al-Li 2195 would result in substantial weight savings, as was the case when this replacement was made on the shuttle external tank. A key component of cryogenic tanks are the gores, which are welded together to make the rounded ends of the tanks. The required thicknesses of these gores depend on the specific SLS configuration and may exceed the current experience base in the manufacture of such gores by the stretch forming process. Here we describe the steps taken to enhance the formability of Al-Li 2195 by optimizing the heat treatment and stretch forming processes for gore thicknesses up to 0.75", which envelopes the maximum expected gore thicknesses for SLS tanks. An annealing treatment, developed at Marshall Space Flight Center, increased the forming range and strain hardening exponent of Al-Li 2195 plates. Using this annealing treatment, one 0.525" thick and two 0.75" thick gores were manufactured by the stretch forming process. The annealing treatment enabled the stretch forming of the largest ever cross sectional area (thickness x width) of an Al-Li 2195 plate achieved by the manufacturer. Mechanical testing of the gores showed greater than expected ultimate tensile strength, yield strength, modulus, and elongation values. The gores also exhibited acceptable fracture toughness at room and LN2 temperatures. All of the measured data indicate that the stretch formed gores have sufficient material properties to be used in flight domes.

  9. Traveltime characteristics of Gore Creek and Black Gore Creek, upper Colorado River basin, Colorado

    USGS Publications Warehouse

    Gurdak, Jason J.; Spahr, Norman E.; Szmajter, Richard J.

    2002-01-01

    In the Rocky Mountains of Colorado, major highways are often constructed in stream valleys. In the event of a vehicular accident involving hazardous materials, the close proximity of highways to the streams increases the risk of contamination entering the streams. Recent population growth has contributed to increased traffic volume along Colorado highways and has resulted in increased movement of hazardous materials, particularly along Interstate 70. Gore Creek and its major tributary, Black Gore Creek, are vulnerable to such contamination from vehicular accidents along Interstate 70. Gore Creek, major tributary of the Eagle River, drains approximately 102 square miles, some of which has recently undergone significant urban development. The headwaters of Gore Creek originate in the Gore Range in the eastern part of the Gore Creek watershed. Gore Creek flows west to the Eagle River. Beginning at the watershed boundary on Vail Pass, southeast of Vail Ski Resort, Interstate 70 parallels Black Gore Creek and then closely follows Gore Creek the entire length of the watershed. Interstate 70 crosses Gore Creek and tributaries 20 times in the watershed. In the event of a vehicular accident involving a contaminant spill into Gore Creek or Black Gore Creek, a stepwise procedure has been developed for water-resource managers to estimate traveltimes of the leading edge and peak concentration of a conservative contaminant. An example calculating estimated traveltimes for a hypothetical contaminant release in Black Gore Creek is provided. Traveltime measurements were made during May and September along Black Gore Creek and Gore Creek from just downstream from the Black Lakes to the confluence with the Eagle River to account for seasonal variability in stream discharge. Fluorometric dye injection of rhodamine WT and downstream dye detection by fluorometry were used to measure traveltime characteristics of Gore Creek and Black Gore Creek. During the May traveltime measurements

  10. In Brief: IPCC and Gore share Nobel Peace Prize

    NASA Astrophysics Data System (ADS)

    Showstack, Randy

    2007-10-01

    The Intergovernmental Panel on Climate Change (IPCC) and former U.S. Vice President Al Gore, Jr. have been named as co-recipients of the 2007 Nobel Peace Prize, the Norwegian Nobel Committee announced on 12 October. The Committee cited them "for their efforts to build up and disseminate greater knowledge about man-made climate change, and to lay the foundations for the measures that are needed to counteract such change."

  11. Truth and opinion in climate change discourse: the Gore-Hansen disagreement.

    PubMed

    Russill, Chris

    2011-11-01

    In this paper, I discuss the "inconvenient truth" strategy of Al Gore. I argue that Gore's notion of truth upholds a conception of science and policy that narrows our understanding of climate change discourse. In one notable exchange, Gore and NASA scientist, James Hansen, disagreed about whether scientific statements based on Hansen's computer simulations were truth or opinion. This exchange is featured in An Inconvenient Truth, yet the disagreement is edited from the film and presented simply as an instance of Hansen speaking "inconvenient truth". In this article, I compare the filmic representation of Hansen's testimony with the congressional record. I place their exchange in a broader historical perspective on climate change disputation in order to discuss the implications of Gore's perspective on truth. PMID:22397086

  12. Pyroxenite is a possible cause of enriched magmas in island arc settings: Gorely volcano (Kamchatka)

    NASA Astrophysics Data System (ADS)

    Gavrilenko, M.; Carr, M. J.; Herzberg, C. T.; Ozerov, A.

    2013-12-01

    Kamchatka peninsula (Russia) is an island-arc with a complex geological history and structure. It has three distinct volcanic fronts, whose origins are still debated. Moreover, a junction with the Aleutian Arc (at ~56oN) complicates the understanding of geodynamics at the region. The process of magma generation in Kamchatka involves several components: N-MORB mantle wedge (variably depleted), slab fluids and melts, and enriched mantle [Churikova et al. 2001, 2007; Yogodzinsky et al. 2001; Volynets et al. 2010]. Two of these end members (mantle wedge, slab fluids) are well studied [Portnyagin et al. 2007; Duggen et al. 2007]. However, the nature/genesis of the enriched magmas is unclear. In the standard model of arc volcanism depleted mantle peridotite in the mantle wedge partially melts to form parental basalts. However, evidence for pyroxenite melting in the arc environment was reported for the Mexican Volcanic Belt [Straub et al, 2008; Straub et al, 2013] and for Kamchatka [Portnyagin, 2009; Portnyagin, 2011; Bryant et al., 2011; Gavrilenko, 2012]. High precision Ni, Ca, and Mn contents of olivines from Gorely volcano confirm the existence of pyroxenite source in the mantle wedge [Gavrilenko, 2013]. Our forward modeling using Arc Basalt Simulator 4.0 (ABS) by [Kimura et al. 2011]) shows that we have primitive mantle as a source for Gorely volcano, a mantle more enriched than the DMM in the standard model for arc magmatism) REE inverse modeling [after Feigenson et al, 1983] agrees with the ABS forward model, returning the same REE pattern for the source. In contrast, ABS modeling for Mutnovsky volcano (next to Gorely, but closer to the trench) shows standard DMM as the source for the volcano. We conclude that DMM is the composition for the mantle wedge rocks beneath Gorely volcano, but the enrichment of the parental melts at Gorely volcano is caused by reaction of DMM peridotite with slab melts/fluids to produce pyroxenite.

  13. The UNO Aviation Monograph Series: Aviation Security: An Annotated Bibliography of Responses to the Gore Commission

    NASA Technical Reports Server (NTRS)

    Carrico, John S.; Schaaf, Michaela M.

    1998-01-01

    This monograph is a companion to UNOAI Monograph 96-2, "The Image of Airport Security: An Annotated Bibliography," compiled in June 1996. The White House Commission on Aviation Safety and Security, headed by Vice President Al Gore, was formed as a result of the TWA Flight 800 crash in August 1996. The Commission's final report included 31 recommendations addressed toward aviation security. The recommendations were cause for security issues to be revisited in the media and by the aviation industry. These developments necessitated the need for an updated bibliography to review the resulting literature. Many of the articles were written in response to the recommendations made by the Gore Commission. "Aviation Security: An Annotated Bibliography of Responses to the Gore Commission" is the result of this need.

  14. Climate Change Draws World Attention: The 2007 Nobel Peace Award Goes to Gore and IPCC

    ERIC Educational Resources Information Center

    Bisland, Beverly Milner; Ahmad, Iftikhar

    2008-01-01

    In the fall of 2007, the Nobel Committee awarded their Peace Prize to the Intergovernmental Panel on Climate Change (a scientific intergovernmental body set up by the World Meteorological Organization and by the United Nations Environment Program) and to former Vice-President Al Gore, Jr. The committee praised the United Nations panel for creating…

  15. Influence of ion/atom arrival ratio on structure and optical properties of AlN films by ion beam assisted deposition

    NASA Astrophysics Data System (ADS)

    Meng, Jian-ping; Fu, Zhi-qiang; Liu, Xiao-peng; Yue, Wen; Wang, Cheng-biao

    2014-10-01

    In order to improve the optical properties of AlN films, the influence of the ion/atom arrival ratio on the structure and optical characteristics of AlN films deposited by dual ion beam sputtering was studied by using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, spectroscopic ellipsometry and UV-vis spectroscopy. The films prepared at the ion/atom arrival ratio of 1.4 are amorphous while the crystalline quality is improved with the increase of the ion/atom arrival ratio. The films deposited at the ion/atom arrival ratio of no less than 1.8 have an approximately stoichiometric ratio and mainly consist of aluminum nitride with little aluminum oxynitride, while metallic aluminum component appears in the films deposited at the ion/atom arrival ratio of 1.4. When the ion/atom arrival ratio is not less than 1.8, films are smooth, high transmitting and dense. The films prepared with high ion/atom arrival ratio (≥1.8) display the characteristic of a dielectric. The films deposited at the ion/atom arrival ratio of 1.4 are coarse, opaque and show characteristic of cermet.

  16. 77 FR 21722 - Gore Creek Restoration Project; Intent To Prepare an Environmental Impact Statement

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-11

    ... Forest Service Gore Creek Restoration Project; Intent To Prepare an Environmental Impact Statement AGENCY: Medicine Bow-Routt National Forests, Forest Service, USDA. Project: Gore Creek Restoration Project. ACTION... proposed Gore Creek Restoration Project (Gore Creek). The Gore Creek analysis area...

  17. Magma mixing and degassing processes in the magma chamber of Gorely volcano (Kamchatka): evidence from whole-rock and olivine chemistry.

    NASA Astrophysics Data System (ADS)

    Gavrilenko, M.; Ozerov, A.; Kyle, P. R.; Carr, M. J.; Nikulin, A.

    2015-12-01

    Gorely is a shield-type volcano in southern Kamchatka currently in an eruptive phase [1] with prior eruptions recorded in 1980 and 1984 [4]. It is comprised of three main structural units: ancient (middle Pleistocene) edifice called 'Old-Gorely' volcano; thick ignimbrite complex, associated with a caldera forming eruption (40 ka); modern edifice named 'Young Gorely' growing inside the caldera [6]. Gorely lavas consist of a suite of compositions ranging from basalt to rhyolite (calk-alkaline series).In this study we describe the mixing processes in magma chamber [2] based on analysis of whole-rock and mineralogical data in an attempt to compare the magma evolution pathways for 'Old Gorely' and Young Gorely volcanoes. Our results indicate that fractional crystallization (FC) is the dominant process for 'Old Gorely' magmas, while 'Young Gorely' magmas are the result of mixing of primitive and evolved magmas in Gorely magma chamber], which is located at depth range from 2 to 10 km below the volcano edifice [6]. We present results of olivine high-precision electron microprobe data analysis (20kV, 300 nA) [7], alongside traditional methods (WR diagrams, mineral zonation) to demonstrate the difference between 'Old' (FC) and 'Young' (mixing) Gorely magmas. We estimated magma H2O (~3 wt.%) content for Gorely magma using independent methods: 1) using THI [8]; 2) using ΔT Ol-Pl [3]; 3) using Ol-Sp temperatures [9]. Additionally, calculations of [4] and analysis of olivine chemistry allow us to describe water content changes during magma evolution. We show that degassing (H2O removal) is necessary for strong plagioclase fractionation, which is observed in Gorely evolved lavas (less than 5 wt.% of MgO). [1] Aiuppa et al. (2012), GRL. 39(6): p.L06307. [2] Gorbach & Portnyagin (2011) Petrology, 19(2): p.134-166. [3] Danyushevsky (2001) JVGR, 110(3-4): p.265-280. [4] Kirsanov & Melekescev (1991) Active volcanoes of Kamchatka, v.2: p.294-317. [5] Mironov & Portnyagin (2011

  18. John Ellard Gore: "Giant Suns and Miniature Stars"

    NASA Astrophysics Data System (ADS)

    Holberg, Jay B.

    2007-12-01

    The Irish amateur astronomer John Ellard Gore (1845-1910) was a founding member of the British Astronomical Association and a prolific author of popular astronomy between 1880 and 1910. He is perhaps best remembered for his books `The Visible Universe’ (1893), an English language translation of Camille Flammarion's `Popular Astronomy’ (1894) and his contributions to Agnes Clerk's `Astronomy’ (1898). I consider a little known investigation that Gore undertook into the question of stellar `sizes’ using binary stars. This led him to the realization of the existence of "Giant Suns” as well as "Miniature Stars” the latter included the sun. Gore also considered the existence of hyper-dense compact objects, now known as white dwarfs. Unfortunately Gore rejected the reality of the latter stellar types. Gore based his conclusions on a formula developed by fellow Irish astronomer W.H.S. Monck, who was reaching similar conclusions about Giant stars through the study of stellar motions.

  19. Voice Outcome after Gore-Tex Medialization Thyroplasty.

    PubMed

    Elnashar, Ismail; El-Anwar, Mohammad; Amer, Hazem; Quriba, Amal

    2015-07-01

    Introduction Although medialization thyroplasty utilizing Gore-Tex (Gore and Associates, Newark, Delaware, United States) has been discussed in the literature, few reports have assessed voice quality afterward, and they did not use a full assessment protocol. Objective To assess the improvement in voice quality after medialization thyroplasty utilizing Gore-Tex in patients with glottic insufficiency of variable etiology. Methods Eleven patients with glottic insufficiency of different etiologies that failed compensation were operated by type 1 thyroplasty utilizing Gore-Tex. Pre- and postoperative (1 week, 3 months, and 6 months) voice assessment was done and statistical analysis was performed on the results. Results In all postoperative assessments, there was significant improvement in the grade of dysphonia (p < 0.004) and highly significant reduction in the size of glottic gap and prolongation of maximum phonation time (p < 0.0001). The difference in voice parameters in the early (1 week) and the late (3 and 6 months) postoperative period was not significant. None of the patients developed stridor or shortness of breath necessitating tracheotomy, and there was no implant extrusion in any patient during the study period. Conclusion Gore-Tex medialization provides reliable results for both subjective and objective voice parameters. It leads to a satisfactory restoration of voice whatever the etiology of glottic incompetence is. This technique is relatively easy and does not lead to major complications. Further studies with larger number of patients and more extended periods of follow-up are still required to assess the long-term results of the technique regarding voice quality and implant extrusion. PMID:26157500

  20. Voice Outcome after Gore-Tex Medialization Thyroplasty

    PubMed Central

    Elnashar, Ismail; El-Anwar, Mohammad; Amer, Hazem; Quriba, Amal

    2015-01-01

    Introduction Although medialization thyroplasty utilizing Gore-Tex (Gore and Associates, Newark, Delaware, United States) has been discussed in the literature, few reports have assessed voice quality afterward, and they did not use a full assessment protocol. Objective To assess the improvement in voice quality after medialization thyroplasty utilizing Gore-Tex in patients with glottic insufficiency of variable etiology. Methods Eleven patients with glottic insufficiency of different etiologies that failed compensation were operated by type 1 thyroplasty utilizing Gore-Tex. Pre- and postoperative (1 week, 3 months, and 6 months) voice assessment was done and statistical analysis was performed on the results. Results In all postoperative assessments, there was significant improvement in the grade of dysphonia (p < 0.004) and highly significant reduction in the size of glottic gap and prolongation of maximum phonation time (p < 0.0001). The difference in voice parameters in the early (1 week) and the late (3 and 6 months) postoperative period was not significant. None of the patients developed stridor or shortness of breath necessitating tracheotomy, and there was no implant extrusion in any patient during the study period. Conclusion Gore-Tex medialization provides reliable results for both subjective and objective voice parameters. It leads to a satisfactory restoration of voice whatever the etiology of glottic incompetence is. This technique is relatively easy and does not lead to major complications. Further studies with larger number of patients and more extended periods of follow-up are still required to assess the long-term results of the technique regarding voice quality and implant extrusion. PMID:26157500

  1. Gore's Nobel May Bring Even More Attention on Campuses to Environmental Issues: Award for Combating Climate Change Implicitly Honors the Work of Academic Scientists

    ERIC Educational Resources Information Center

    Byrne, Richard; Monastersky, Richard

    2007-01-01

    When the Norwegian Nobel Committee announced that the 2007 Nobel Peace Prize would be shared by Al Gore, the former U.S. vice president, and the Intergovernmental Panel on Climate Change, the award implicitly celebrated a third party--academic institutions. Much of the research on global warming has come from university scientists, and higher…

  2. Seismic structures beneath Popocatepetl (Mexico) and Gorely (Kamchatka) volcanoes derived from passive tomography studies

    NASA Astrophysics Data System (ADS)

    Kuznetsov, Pavel; Koulakov, Ivan

    2014-05-01

    A number of active volcanoes are observed in different parts of the world, and they attract great interest of scientists. Comparing their characteristics helps in understanding the origin and mechanisms of their activity. One of the most effective methods for studying the deep structure beneath volcanoes is passive source seismic tomography. In this study we present results of tomographic inversions for two active volcanoes located in different parts of the world: Popocatepetl (Mexico) and Gorely (Kamchatka, Russia). In the past century both volcanoes were actively erupted that explains great interest to their detailed investigations. In both cases we made the full data analysis starting from picking the arrival times from local events. In the case of the Popocatepetl study, a temporary seismological network was deployed by GFZ for the period from December 1999 to July 2000. Note that during this period there were a very few events recorded inside the volcano. Most of recorded earthquakes occurred in surrounding areas and they probably have the tectonic nature. We performed a special analysis to ground the efficiency of using these data for studying seismic structure beneath the network installed on the volcano. The tomographic inversion was performed using the LOTOS code by Koulakov (2009). Beneath the Popocatepetl volcano we have found a zone of strong anti-correlation between P- and S-velocities that leaded to high values of Vp/Vs ratio. Similar features were found for some other volcanoes in previous studies. We interpret these anomalies as zones of high content of fluids and melts that are related to active magma sources. For the case of Gorely volcano we used the data of a temporary network just deployed in summer 2013 by our team from IPGG, Novosibirsk. Luckily, during the field works, the volcano started to manifest strong seismic activity. In this period, 100 - 200 volcanic events occurred daily. We collected the continuous seismic records from 20 stations

  3. Environmental technology verification report: Passive soil gas sampler. W. L. Gore and Associates, Inc. Gore-Sorber screening survey

    SciTech Connect

    1998-08-01

    This document summarizes the results of a demonstration of the WL Gore and Associates, GORE-SORBER{reg_sign} screening survey passive soil gas sampling system. The performance of this system was compared to the reference sampling method, active soil gas sampling (which provides a snapshot of the soil gas environment at the time the sample was collected). The comparison addressed three parameters VOC detection and quantitation; sample retrieval time, and cost. Data quality indicators for precision, accuracy, representativeness, completeness and comparability were also assessed against project-specific QA objectives to ensure usefulness of the data. A complete description of the demonstration, including a data summary and discussion of results is available in this report.

  4. Abrupt transition from fractional crystallization to magma mixing at Gorely volcano (Kamchatka) after caldera collapse

    NASA Astrophysics Data System (ADS)

    Gavrilenko, Maxim; Ozerov, Alexey; Kyle, Philip R.; Carr, Michael J.; Nikulin, Alex; Vidito, Christopher; Danyushevsky, Leonid

    2016-07-01

    A series of large caldera-forming eruptions (361-38 ka) transformed Gorely volcano, southern Kamchatka Peninsula, from a shield-type system dominated by fractional crystallization processes to a composite volcanic center, exhibiting geochemical evidence of magma mixing. Old Gorely, an early shield volcano (700-361 ka), was followed by Young Gorely eruptions. Calc-alkaline high magnesium basalt to rhyolite lavas have been erupted from Gorely volcano since the Pleistocene. Fractional crystallization dominated evolution of the Old Gorely magmas, whereas magma mixing is more prominent in the Young Gorely eruptive products. The role of recharge-evacuation processes in Gorely magma evolution is negligible (a closed magmatic system); however, crustal rock assimilation plays a significant role for the evolved magmas. Most Gorely magmas differentiate in a shallow magmatic system at pressures up to 300 MPa, ˜3 wt% H2O, and oxygen fugacity of ˜QFM + 1.5 log units. Magma temperatures of 1123-1218 °C were measured using aluminum distribution between olivine and spinel in Old and Young Gorely basalts. The crystallization sequence of major minerals for Old Gorely was as follows: olivine and spinel (Ol + Sp) for mafic compositions (more than 5 wt% of MgO); clinopyroxene and plagioclase crystallized at ˜5 wt% of MgO (Ol + Cpx + Plag) and magnetite at ˜3.5 wt% of MgO (Ol + Cpx + Plag + Mt). We show that the shallow magma chamber evolution of Old Gorely occurs under conditions of decompression and degassing. We find that the caldera-forming eruption(s) modified the magma plumbing geometry. This led to a change in the dominant magma evolution process from fractional crystallization to magma mixing. We further suggest that disruption of the magma chamber and accompanying change in differentiation process have the potential to transform a shield volcanic system to that of composite cone on a global scale.

  5. Seismic tremor associated with the degassing of the Gorely volcano in 2013-2014

    NASA Astrophysics Data System (ADS)

    Abramenkov, Sergey; Shapiro, Nikolai; Koulakov, Ivan; Abkadyirov, Ilyas; Frank, William; Jakovlev, Andrey

    2016-04-01

    We present observation of seismic activity associated with the strong degassing episode occurred in Gorely volcano (Kamchatka, Russia) in 2013-2014. We use the data of a temporary network of 21 broadband seismographs that operated on this volcano during one year. During the considered period, the volcanic activity mainly consisted of sustained gas emission that produced strong volcanic tremor well recorded by seismic stations. A close analysis of this tremor revealed that it was composed of many very frequent pulses of seismic energy. The corresponding signals had an emergent character without clear arrivals of P and S waves, which is typical for burst of Long Period (LP) events on many volcanoes. We developed a source-scanning algorithm based on summation of seismogram envelopes for automatic detection and location of these LP events. With the help of this method, numerous events originated from the vicinity of the main crater were detected. In a next step, we cross-correlated the waveforms of the detected LP events and found that a large part of them can be regrouped in families of seismic multiplets. This indicates that the increased pressure produced by the volcanic degassing activates a set of non-destructive shallow seismic sources in vicinity of the main volcanic conduit. The developed analysis of continuous seismic records was used to characterize the spatio-temporal evolution of these sources.

  6. Gore-Mbeki Binational Commission integrated housing program. Final report

    SciTech Connect

    1998-12-31

    This report documents the work done under Grant DE-FG36-97GO10209, Innovative Renewable Energy Technology Transfer Program. PEER Consultants, PC, and its subcontractor, PEER Africa (Pty.) Ltd., received an $88,000.00 grant to plan and build two energy efficient homes in the black township of Gugulethu in Cape Town, South Africa. These demonstration homes were given to the people of South Africa as a gesture of goodwill by the US government as part of the Gore-Mbeki Binational Commission (BNC) agreements and cooperation. The BNC is the term used to describe the agreement to work together by the US and the South African governments for economic development of South Africa in the areas of energy, commerce, agriculture, housing, and transportation. The BNC was formed in 1995. This project under the auspices of the BNC started in September 1996. The DOE-funded portion was performed between January 11, 1997 and February 28, 1997.

  7. Room temperature stretch forming of scale space shuttle external tank dome gores. Volume 1: Technical

    NASA Technical Reports Server (NTRS)

    Blunck, R. D.; Krantz, D. E.

    1974-01-01

    An account of activities and data gathered in the Room Temperature Stretch Forming of One-third Scale External Tank Bulkhead Gores for space shuttle study, and a tooling design and production cost study are reported. The following study phases are described: (1) the stretch forming of three approximately one-third scale external tank dome gores from single sheets of 2219-T37 aluminum alloy; (2) the designing of a full scale production die, including a determination of tooling requirements; and (3) the determination of cost per gore at the required production rates, including manufacturing, packaging, and shipping.

  8. Treatment of a malignant esophageal fistula with a Gore-Tex-covered flexible nitinol stent

    SciTech Connect

    Kishi, Kazushi; Takeuchi, Taizo; Sonomura, Tetsuo; Kimura, Masashi; Kita, Keisuke; Sato, Morio; Terada, Masaki

    1997-01-15

    In order to treat fistulated esophageal cancer using a flexible stent, a covered flexible stent was constructed by wrapping a nitinol stent with a thin sheet of Gore-Tex, preserving the stents original advantages of flexibility and a low-profile introducer system. This stent was used to perform standard radiotherapy in a case of fistulated esophageal cancer.

  9. Top Aide to Gore is Named To Revamp the Delivery of Federal Student Aid.

    ERIC Educational Resources Information Center

    Burd, Stephen

    1998-01-01

    A top aide to Vice President Gore has been chosen to lead the U.S. Department of Education's effort to modernize delivery of financial aid to students and colleges. His office is the first federal government entity to be run as a "performance-based organization." Some fear he may politicize the office that lawmakers specified be led by a…

  10. The Complicated Pig Speaks: A Reply to Gore and Brown and Tinsley

    ERIC Educational Resources Information Center

    Eggerth, Donald E.

    2006-01-01

    In this article, responses are made to comments regarding Eggerth and Andrew (2006) by Gore and Brown (2006) calling for simplification of the modified C index and by Tinsley (2006) questioning the logic of the modified C index (all articles in this issue).

  11. First case of osteomyelitis due to Erysipelothrix rhusiopathiae: pubic osteomyelitis in a gored farmer.

    PubMed

    Denes, E; Camilleri, Y; Fiorenza, F; Martin, C

    2015-01-01

    We report the first proven case of osteomyelitis due to Erysipelothrix rhusiopathiae. This infection occurred almost 20 years after traumatic inoculation of the bacterium, when the patient was gored by one of his cows. Diagnosis was made by bone biopsies, and treatment included rifampicin and levofloxacin for 3 months. PMID:25462176

  12. ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT--BAGHOUSE FILTRATION PRODUCTS, W.L. GORE ASSOC., INC.

    EPA Science Inventory

    The U.S. Environmental Protection Agency Air Pollution Control Technology (APCT) Verification Center evaluates the performance of baghouse filtration products used primarily to control PM2.5 emissions. This verification statement summarizes the test results for W.L. Gore & Assoc....

  13. George W. Bush at Goree Island: American Slavery and the Rhetoric of Redemption

    ERIC Educational Resources Information Center

    Medhurst, Martin J.

    2010-01-01

    On July 8, 2003, at Goree Island, Senegal, George W. Bush delivered the most important speech on American slavery since Abraham Lincoln. As an example of rhetorical artistry, the speech is a masterpiece, putting the brutality of slavery into historical, political, and theological perspective. Although the speech had deliberative effects--it grew…

  14. Histopathological changes in the human larynx following expanded polytetrafluroethylene (Gore-Tex®) implantation

    PubMed Central

    Rajkumar, K; Khalil, HS; Elloy, M; Sheffield, E; Baldwin, DL

    2005-01-01

    Background Expanded polytetrafluroethelyne (e PTFE, Gore-Tex®) has been advocated as an implant material for medialization of the vocal fold. Animal studies involving rabbits and a porcine model have demonstrated host tolerance of the implant. There have been no reports describing the histological changes in a human laryngectomy specimen with a Gore-Tex implant. Case presentation The histological findings in a laryngectomy specimen of a patient previously implanted with e PTFE for medialization of a paralyzed vocal fold following excision of a vagal neurofibroma were studied. Histopathology revealed a mild foreign-body giant cell granulomatous reaction with some associated fibrosis. The granulomatous response was limited to the periphery of the Gore-Tex and although it closely followed the profile of the material it did not encroach into or significantly break up the material. There was no significant neutrophilic or lymphocytic inflammation. Conclusions Our findings are consistent with the animal models confirming that Gore-Tex implantation does not result in a significant granulomatous reaction in the human larynx over a 13-month period. Moreover, there is no evidence of resorption or infection. Further, the lack of lymphocytes in association with the granulomas indicates that there is no significant immunological hypersensitivity. Histologically, the slight permeation by connective tissue is similar to that seen in Gore-Tex vascular and cardiac implants. The degree of the slight giant cell response appears to be dependent on the profile of the material; a sharp edge incited more of a response than a flat surface. PMID:15663781

  15. Field validation of GORE-SORBER{sup SM} Screening Surveys at sites containing high molecular weight petroleum products

    SciTech Connect

    Stutman, M.B.; Wrigley, M.J.

    1995-12-31

    The objective of this survey was to demonstrate the applicability of GORE-SORBER{reg_sign} Screening Surveys (GSSS) in delineating the relative subsurface distribution of low volatility, high molecular weight, organic chemical contaminants (polynuclear aromatic hydrocarbons (PAHs)) often associated with town gas manufacturing facilities. The GORE-SORBER Screening Survey (GSSS) is a comprehensive service offered worldwide by W.L. Gore and Associates of Elkton, MD. This includes a unique sensing element, the GORE-SORBER Module, analysis via GC/MS and a final report with results presented in both in tabular format and as color contours overlaid on CAD maps of the site. The GORE-SORBER Module is a cord-like, chemically inert GORE-TEX{reg_sign} membrane container which houses smaller GORE-TEX tubes filled with special sorbent material. The modules are manually inserted directly into shallow soil or ground water where hydrocarbon vapors partition directly across the membrane and are captured on the sorbents.

  16. Suspected variables among Al Sufi stars.

    NASA Astrophysics Data System (ADS)

    Hoffleit, D.

    In the tenth century Al Sufi compiled a catalogue of some 1100 stars. J.E. Gore, around 1900, wrote extensively on the magnitudes of these stars. On intercomparing them with a few other catalogues, Gore surmised that some 38 stars appeared to show secular variations. Here all the Al Sufi magnitudes have been compared with numerous additional sources, but smooth secular variations are not substantiated although some stars seem to have undergone comparatively sudden changes after about 1600. About 70 Al Sufi stars are now named or suscpected variable stars, but nearly all with amplitudes under 0.3 V.

  17. The Supreme Court's Misplaced Concern with Selective Fairness: Bush v. Gore and Three Analogies to Grading Dilemmas.

    ERIC Educational Resources Information Center

    Wang, William K. S.

    2002-01-01

    Regarding the Supreme Court's decision in the Bush v. Gore election controversy, argues that selective fairness to individual voters is better than no increase in fairness. Offers three analogies to grading dilemmas faced by teachers. (EV)

  18. On the efficiency of Gore-Tex layer for brain protection from shock wave damage in cranioplasty

    NASA Astrophysics Data System (ADS)

    Saito, T.; Voinovich, P. A.; Nakagawa, A.; Hosseini, S. H. R.; Takayama, K.; Hirano, T.

    2004-11-01

    The effectiveness of a Gore-Tex layer for protecting soft tissue from damage in shock wave therapy is investigated analytically, numerically and experimentally. Analytical considerations based on the fundamentals of wave dynamics and two-dimensional numerical simulations based on the elastodynamic equations are carried out for underwater shock wave propagation and interaction with Gore-Tex membrane models of different complexity. The results clearly demonstrate that considerable attenuation of shock waves with Gore-Tex is due to the air trapped inside the membrane. The experimental results confirm that a Gore-Tex sheet placed in the liquid reduces the transmitted shock wave peak overpressure significantly, by up to two orders of magnitude. Another experimental series reveals what kind of damage in the rat brain tissue can be caused by shock waves of different intensity.

  19. Carotid bypass using the Gore Hybrid Vascular Graft as a rescue technique for on-table failed carotid endarterectomy.

    PubMed

    Valenti, Domenico; Sayed, Saiqa; Mistry, Hiren; Rashid, Hisham; Gambhir, Raghvinder; Slim, Hani

    2016-07-01

    Carotid endarterectomy (CEA) remains the "gold standard" for atherosclerotic lesions involving the carotid bifurcation. Carotid bypass grafting using either polytetrafluoroethylene or long saphenous vein is a suitable alternative technique, especially in challenging endarterectomy and on-table failed CEA. We report our initial experience of using the Gore Hybrid Vascular Graft (W. L. Gore & Associates, Flagstaff, Ariz) in six patients as a rescue technique when standard CEA failed. PMID:26409841

  20. Multiscale methods for gore curvature calculations from FSI modeling of spacecraft parachutes

    NASA Astrophysics Data System (ADS)

    Takizawa, Kenji; Tezduyar, Tayfun E.; Kolesar, Ryan; Boswell, Cody; Kanai, Taro; Montel, Kenneth

    2014-12-01

    There are now some sophisticated and powerful methods for computer modeling of parachutes. These methods are capable of addressing some of the most formidable computational challenges encountered in parachute modeling, including fluid-structure interaction (FSI) between the parachute and air flow, design complexities such as those seen in spacecraft parachutes, and operational complexities such as use in clusters and disreefing. One should be able to extract from a reliable full-scale parachute modeling any data or analysis needed. In some cases, however, the parachute engineers may want to perform quickly an extended or repetitive analysis with methods based on simplified models. Some of the data needed by a simplified model can very effectively be extracted from a full-scale computer modeling that serves as a pilot. A good example of such data is the circumferential curvature of a parachute gore, where a gore is the slice of the parachute canopy between two radial reinforcement cables running from the parachute vent to the skirt. We present the multiscale methods we devised for gore curvature calculation from FSI modeling of spacecraft parachutes. The methods include those based on the multiscale sequentially-coupled FSI technique and using NURBS meshes. We show how the methods work for the fully-open and two reefed stages of the Orion spacecraft main and drogue parachutes.

  1. Low-flow water-quality characterization of the Gore Creek watershed, upper Colorado River basin, Colorado, August 1996

    USGS Publications Warehouse

    Wynn, Kirby H.; Spahr, Norman E.

    1998-01-01

    The Upper Colorado River Basin (UCOL) is one of 59 National Water-Quality Assessment (NAWQA) study units designed to assess the status and trends of the Nation?s water quality (Leahy and others, 1990). The UCOL study unit began operation in 1994, and surface-water-quality data collection at a network of 14 sites began in October 1995 (Apodaca and others, 1996; Spahr and others, 1996). Gore Creek, which flows through Vail, Colorado, originates in pristine alpine headwaters and is designated a gold-medal trout fishery. The creek drains an area of about 102 square miles and is a tributary to the Eagle River. Gore Creek at the mouth near Minturn (site 13 in fig. 1) is one of the 14 sites in the UCOL network. This site was selected to evaluate water quality resulting from urban development and recreational land use. The Gore Creek watershed has undergone rapid land-use changes since the 1960?s as the Vail area shifted from traditional mountain ranchlands to a four-season resort community. Residential, recreational, commercial, and transportation development continues near Gore Creek and its tributaries to support the increasing permanent and tourist population of the area. Interstate 70 runs through the watershed from Vail Pass near site 14, along the eastern side of Black Gore Creek, and along the northern side of the main stem of Gore Creek to the mouth of the watershed (fig. 1). A major local concern is how increasing urbanization/recreation affects the water quality, gold-medal trout fishery, and aesthetic values of Gore Creek. An evaluation of the spatial characteristics of water quality in the watershed upstream from site 13 at the mouth of Gore Creek (fig. 1) can provide local water and land managers with information necessary to establish water policy and make land-use planning decisions to maintain or improve water quality. Historical data collected at the mouth of Gore Creek provide information about water quality resulting from land use, but a synoptic

  2. Experimental studies on BrO/Br ratios at Stromboli, Etna, Masaya, Gorely and Nyiragongo

    NASA Astrophysics Data System (ADS)

    Bobrowski, Nicole; Wittmer, Julian; Liotta, Marcello; Calabrese, Sergio; Giuffrida, Giovanni; Brusca, Lorenzo; Platt, Ulrich

    2014-05-01

    Since the discovery of BrO in a volcanic plume (Bobrowski et al. 2003) many measurements have been performed as well as modelling to understand the radical chemistry in volcanic plumes, in particular, the interaction between volcanic gas species, released under strongly reduced conditions, and the oxidizing atmosphere. Besides the goal in atmospheric chemistry to better determine the impact of volcanic emission (e.g. reactive bromine) on the local (and maybe global) scale, volcanologists also have an interest to understand if the BrO/SO2 ratios can be used as a monitoring parameter giving further insides in dynamic processes of volcanoes. One of the major advantages when utilizing BrO/SO2 ratios is the relatively easiness of the measurements, which can be taken in a safe distance from volcanic activity accompanied by a good temporal resolution partly even during explosive eruptions. Recently, it has been shown (Lübcke et al., 2013) that already existing automatically running measurement networks can now be used to gain long-term data sets of BrO/SO2 ratios. However, one of the arguments which potentially makes volcanological interpretations difficult is the reactivity of BrO. Therefore it is, of great importance to link the measurements of BrO and gaseous hydrogen bromide to the total emission flux of bromine in order to estimate the pristine gas composition released from magmas. In particular, meteorological influences, trace gas composition of the surrounding atmosphere and the volcanic gas composition can all potentially effect the formation of BrO and might have to be considered. Some of these factors potentially also influence near source in-situ measurement. We need to answer the question: Can we correlate BrO measurements to the total bromine outgassing? Only with this knowledge we can relate changes of the measured gas ratios (BrO/SO2) to the volcanic fluids emitted by the underlying magma and can interpret data as signals from depth, which provide insight

  3. Arrival Metering Precision Study

    NASA Technical Reports Server (NTRS)

    Prevot, Thomas; Mercer, Joey; Homola, Jeffrey; Hunt, Sarah; Gomez, Ashley; Bienert, Nancy; Omar, Faisal; Kraut, Joshua; Brasil, Connie; Wu, Minghong, G.

    2015-01-01

    This paper describes the background, method and results of the Arrival Metering Precision Study (AMPS) conducted in the Airspace Operations Laboratory at NASA Ames Research Center in May 2014. The simulation study measured delivery accuracy, flight efficiency, controller workload, and acceptability of time-based metering operations to a meter fix at the terminal area boundary for different resolution levels of metering delay times displayed to the air traffic controllers and different levels of airspeed information made available to the Time-Based Flow Management (TBFM) system computing the delay. The results show that the resolution of the delay countdown timer (DCT) on the controllers display has a significant impact on the delivery accuracy at the meter fix. Using the 10 seconds rounded and 1 minute rounded DCT resolutions resulted in more accurate delivery than 1 minute truncated and were preferred by the controllers. Using the speeds the controllers entered into the fourth line of the data tag to update the delay computation in TBFM in high and low altitude sectors increased air traffic control efficiency and reduced fuel burn for arriving aircraft during time based metering.

  4. Al Gore did Not Invent the Internet, Hans Christian Oersted did in 1820

    NASA Astrophysics Data System (ADS)

    Roberts, James; Anand, Aman; Dahiya, Jai

    2009-04-01

    In this talk it will be shown how the simple process of a current in a wire producing ``action at a distance'' in a compass can lead to development of the telegraph, telephone, wireless communication and finally to the internet. This discovery led to the invention of a motor and an electric generator. Such simple discoveries often have profound effects on what we are able to do. A discussion of how activities based on this discovery are being used in the Regional Collaborative for Excellence in Science Teaching UNT to engage students and teachers in science activities. Hand out materials will be provided to the audience on these activities.

  5. Geology of the Gore Canyon-Kremmling area, Grand County, Colorado

    USGS Publications Warehouse

    Barclay, C.S. Venable

    1968-01-01

    The Gore Canyon-Kremmling area is in the southwestern portion of the Kremmling 15-minute quadrangle, Colorado. Precambrian rocks are biotite gneiss, the Boulder Creek Granodiorite, granophyre dikes, and quartz veins. The Boulder Creek intrudes the biotite gneiss, and both of these units are cut by north-northwest-trending granophyre dikes and quartz veins. Biotite gneiss contains structure elements of a northwest and a northeast fold system. Lineations and foliations in the Boulder Creek are generally concordant to the northeast fold system . of the gneiss. Late Paleozoic to Mesozoic and Mesozoic sedimentary formations, in ascending order and with their approximate thicknesses, are the State Bridge Formation, 15 feet; the Chinle and Chugwater Formations undivided, 0-95 feet; the Sundance Formation, 0?-100 feet; the Morrison Formation, 250 feet; the Dakota Sandstone, 225 feet; the Benton Shale, 340 feet; the Niobrara Formation, 600 feet; and the Pierre Shale. Quaternary deposits are terrace, landslide, and modern flood-plain deposits. Laramide rock deformation is related to the Park Range uplift and includes faulting and, in the sediments, some folding. Some of the faults, including the regional Gore fault, are Precambrian structures reactivated in Laramide time.

  6. Hiatal Hernia Repair with Gore Bio-A Tissue Reinforcement: Our Experience

    PubMed Central

    Antonino, Agrusa; Giorgio, Romano; Giuseppe, Frazzetta; Giovanni, De Vita; Silvia, Di Giovanni; Daniela, Chianetta; Giuseppe, Di Buono; Vincenzo, Sorce; Gaspare, Gulotta

    2014-01-01

    Type I hiatal hernia is associated with gastroesophageal reflux disease (GERD) in 50–90% of cases. Several trials strongly support surgery as an effective alternative to medical therapy. Today, laparoscopic fundoplication is considered as the procedure of choice. However, primary laparoscopic hiatal hernia repair is associated with upto 42% recurrence rate. Mesh reinforcement of the crural closure decreases the recurrence but can lead to complications, above all nonabsorbable ones. We experiment a new totally absorbable mesh by Gore. Case. We present a case of a 65-year-old female patient with a 6-year classic history of GERD. Endoscopy revealed a large hiatal hernia and esophagitis. pH study was positive for acid reflux; esophageal manometry revealed LES intrathoracic dislocation. With laparoscopic approach, the hiatal hernia defect was identified and primarily repaired, by crural closure. Gore Bio-A Tissue Reinforcement was trimmed to fit the defect accommodating the esophagus. Nissen fundoplication was performed. Result. Bio-A mesh was easily placed laparoscopically. It has good handling and could be cut and tailored intraoperatively for optimal adaptation. There were no short-term complications. Conclusion. Crural closure reinforcement can be done readily with this new totally absorbable mesh replaced by soft tissue over six months. However, further data and studies are needed to evaluate long-term outcomes. PMID:24864221

  7. Hiatal hernia repair with gore bio-a tissue reinforcement: our experience.

    PubMed

    Antonino, Agrusa; Giorgio, Romano; Giuseppe, Frazzetta; Giovanni, De Vita; Silvia, Di Giovanni; Daniela, Chianetta; Giuseppe, Di Buono; Vincenzo, Sorce; Gaspare, Gulotta

    2014-01-01

    Type I hiatal hernia is associated with gastroesophageal reflux disease (GERD) in 50-90% of cases. Several trials strongly support surgery as an effective alternative to medical therapy. Today, laparoscopic fundoplication is considered as the procedure of choice. However, primary laparoscopic hiatal hernia repair is associated with upto 42% recurrence rate. Mesh reinforcement of the crural closure decreases the recurrence but can lead to complications, above all nonabsorbable ones. We experiment a new totally absorbable mesh by Gore. Case. We present a case of a 65-year-old female patient with a 6-year classic history of GERD. Endoscopy revealed a large hiatal hernia and esophagitis. pH study was positive for acid reflux; esophageal manometry revealed LES intrathoracic dislocation. With laparoscopic approach, the hiatal hernia defect was identified and primarily repaired, by crural closure. Gore Bio-A Tissue Reinforcement was trimmed to fit the defect accommodating the esophagus. Nissen fundoplication was performed. Result. Bio-A mesh was easily placed laparoscopically. It has good handling and could be cut and tailored intraoperatively for optimal adaptation. There were no short-term complications. Conclusion. Crural closure reinforcement can be done readily with this new totally absorbable mesh replaced by soft tissue over six months. However, further data and studies are needed to evaluate long-term outcomes. PMID:24864221

  8. Interpositional arthroplasty with Gore-Tex, Marlex or tendon for osteoarthritis of the trapeziometacarpal joint. A retrospective comparative study.

    PubMed

    Muermans, S; Coenen, L

    1998-02-01

    In this retrospective study of 26 patients with arthritis of the thumb carpometacarpal joint, we report the use of expanded polytetrafluoroethylene (ePTFE) (Gore-Tex) and polypropylene (Marlex) as interpositional materials for resection arthroplasty of the trapeziometacarpal joint. We have compared the results with those of "conventional" tendon interposition and those in the literature. In three patients the use of ePTFE (Gore-Tex) was complicated by marked clinical synovitis, resembling findings in silicone synovitis. Therefore, the use of ePTFE has been discontinued. Polypropylene seems to be a valuable alternative to tendon interposition arthroplasty. PMID:9571484

  9. Gore Creek watershed, Colorado : assessment of historical and current water quantity, water quality, and aquatic ecology, 1968-98

    USGS Publications Warehouse

    Wynn, Kirby H.; Bauch, Nancy J.; Driver, Nancy E.

    2001-01-01

    The historical and current (1998) water-quantity, water-quality, and aquatic-ecology conditions in the Gore Creek watershed are described as part of a study by the U.S. Geological Survey, done in cooperation with the Town of Vail, the Eagle River Water and Sanitation District, and the Upper Eagle Regional Water Authority. Interpretation of the available water-quantity, water-quality, and aquatic-ecology data collected by various agencies since 1968 showed that background geology and land use in the watershed influence the water quality and stream biota. Surface-water nutrient concentrations generally increased as water moved downstream through the Town of Vail, but concentrations at the mouth of Gore Creek were typical when compared with national data for urban/undeveloped sites. Nitrate concentrations in Gore Creek were highest just downstream from a wastewater-treatment plant discharge, but concentrations decreased at sites farther downstream because of dilution and nitrogen uptake by algae. Recent total phosphorus concentrations were somewhat elevated when compared to the U.S. Environmental Protection Agency recommended level of 0.10 milligram per liter for control of eutrophication in flowing water. However, total phosphorus concentrations at the mouth of Gore Creek were relatively low when compared to a national study of phosphorus in urban land-use areas. Historically, suspended sediment associated with construction of Interstate 70 in the early 1970's has been of primary concern; however, recent data indicate that streambed aggradation of sediment originating from Interstate 70 traction sanding currently is a greater concern. About 4,000 tons of coarse sand and fine gravel is washed into Black Gore Creek each year following application of traction materials to Interstate 70 during adverse winter driving conditions. Suspended-sediment concentrations were low in Black Gore Creek; however, bedload-transport rates of as much as 4 tons per day have been measured

  10. HELCATS Prediction of Planetary CME arrival times

    NASA Astrophysics Data System (ADS)

    Boakes, Peter; Moestl, Christian; Davies, Jackie; Harrison, Richard; Byrne, Jason; Barnes, David; Isavnin, Alexey; Kilpua, Emilia; Rollett, Tanja

    2015-04-01

    We present the first results of CME arrival time prediction at different planetary locations and their comparison to the in situ data within the HELCATS project. The EU FP7 HELCATS (Heliospheric Cataloguing, Analysis & Techniques Service) is a European effort to consolidate the exploitation of the maturing field of heliospheric imaging. HELCATS aims to catalogue solar wind transients, observed by the NASA STEREO Heliospheric Imager (HI) instruments, and validate different methods for the determination of their kinematic properties. This validation includes comparison with arrivals at Earth, and elsewhere in the heliosphere, as well as onsets at the Sun (http://www.helcats-fp7.eu/). A preliminary catalogue of manually identified CMEs, with over 1000 separate events, has been created from observations made by the STEREO/HI instruments covering the years 2007-2013. Initial speeds and directions of each CME have been derived through fitting the time elongation profile to the state of the art Self-Similar Expansion Fitting (SSEF) geometric technique (Davies et al., 2012). The technique assumes that, in the plane corresponding to the position angle of interest, CMEs can be modelled as circles subtending a fixed angular width to Sun-center and propagating anti-sunward in a fixed direction at a constant speed (we use an angular width of 30 degrees in our initial results). The model has advantages over previous geometric models (e.g. harmonic mean or fixed phi) as it allows one to predict whether a CME will 'hit' a specific heliospheric location, as well as to what degree (e.g. direct assault or glancing blow). We use correction formulae (Möstl and Davies, 2013) to convert CME speeds, direction and launch time to speed and arrival time at any in situ location. From the preliminary CME dataset, we derive arrival times for over 400 Earth-directed CMEs, and for over 100 Mercury-, Venus-, Mars- and Saturn-directed CMEs predicted to impact each planet. We present statistics of

  11. Flight demonstration of a superpressure balloon by three-dimensional gore design

    NASA Astrophysics Data System (ADS)

    Izutsu, N.; Yajima, N.; Ohta, S.; Honda, H.; Kurokawa, H.; Matsushima, K.

    On May 15, 1999, a balloon with a volume of 3,100 cubic meters was successfully launched from Sanriku Balloon Center of Japan. It became a superpressure balloon at 19.2km in altitude with 20% pressure difference to the ambient atmosphere. This is the first superpressure balloon capable of suspending a heavy payload. It was designed by the new 'three-dimensional gore design' method and was based on a pumpkin shape balloon with bulges of small radii between adjacent load tapes without the help of film extensibility. The balloon climbed up to 21.6km in altitude by dropping the ballast and held out against a 64% pressure difference over the ambient atmosphere. This flight test proved the capability of large stratospheric superpressure balloons by this new design method.

  12. Kerr-McGee and the NRC: from Indian country to Silkwood to Gore.

    PubMed

    Baer, H

    1990-01-01

    By focusing upon the Nuclear Regulatory Commission's appraisal of the Kerr-McGee Corporation's safety record in the Four Corners area and at two facilities in Oklahoma, this article examines the political economy of nuclear regulation in American society. Particular attention is given to the agency's response to intervenor groups which protested various operations at Kerr-McGee facility in Gore, Oklahoma, both prior to and following the accidental rupture of a cylinder containing uranium hexafluoride. Despite a consistent record of violations and nuclear mishaps by Kerr-McGee, the Nuclear Regulatory Commission permitted the company to essentially monitor its own activities. Rather than protecting workers and the public from the hazards of the nuclear industry, state regulation attempts to legitimize and defuse public opposition to its endeavors. PMID:2305292

  13. Eternal inflation with arrival terminals

    NASA Astrophysics Data System (ADS)

    Stoltenberg, Henry; Albrecht, Andreas

    2015-01-01

    We analyze the cosmological role of terminal vacua in the string theory landscape, and point out that existing work on this topic makes very strong assumptions about the properties of the terminal vacua. We explore the implications of relaxing these assumptions (by including "arrival" as well as "departure" terminals) and demonstrate that the results in earlier work are highly sensitive to their assumption of no arrival terminals. We use our discussion to make some general points about tuning and initial conditions in cosmology.

  14. Frontal suspension for congenital ptosis using an expanded polytetrafluoroethylene (Gore-Tex®) sheet: one-year follow-up

    PubMed Central

    Nakauchi, Kazuaki; Mito, Hidenori; Mimura, Osamu

    2013-01-01

    Background The frontalis suspension technique is the surgical method of choice in patients with ptosis and a levator function of 4 mm or less. Several types of materials have been used, including Gore-Tex®, which has been used successfully as a frontalis sling material since 1986. Recently, a Gore-Tex sheet (wider than a sling or strip) suspension was reported. This paper reports the results of 27 eyes from 20 patients with congenital ptosis treated using the frontalis suspension technique with the newly developed Gore-Tex Most Versatile Patch (MVP) sheet. Methods All patients underwent surgery between April 2007 and September 2011 and were followed up for at least one year. The average follow-up duration was 18 months, with a range of 12–36 months. The average patient age was 45 (5–85) years, and the group included 11 males and nine females. Thirteen cases demonstrated ptosis in one eye, and seven cases involved both eyes. The patients were divided by age into a younger group and an older group. All ptosis procedures were performed using the Gore-Tex MVP sheet. The implant was normally 7 mm wide for adults and 5 mm wide for children. The implantation method was the same as that used for the sheet shape fascia. Results In all patients, satisfactory functional results were observed at the 6-month follow-up examination. Eyelid opening heights were also obtained. The average marginal reflex distance (MRD) was −0.5 mm preoperatively, which improved to +1.9 mm after surgery. After one year, average MRD was +1.6 mm. MRD attenuation was more frequent in the younger group. There were no cases requiring redo surgery and only one case of exposure. PMID:23345967

  15. Computational fluid dynamic studies of a solid and ribbon 12-gore parachute canopy in subsonic and supersonic flow

    SciTech Connect

    Nelsen, J.M.

    1995-06-01

    Computational fluid dynamic studies of 3-D, fixed geometry, gore-shaped parachute canopies are presented. Both solid and ribbon canopies with a 10% vent diameter are investigated. The flowfields analyzed are laminar and compressible, broaching both the subsonic and supersonic regimes. Results presented include characterization of the local and global flowfields and the internal and external canopy surface pressure distributions. The canopy surface pressure distributions may be utilized in subsequent structural analyses to assess the integrity of the parachute canopy fabric components.

  16. Clinical trial comparing autogenous fascia lata sling and Gore-Tex suspension in bilateral congenital ptosis

    PubMed Central

    Elsamkary, Mahmoud Ahmed; Roshdy, Maged Maher Salib

    2016-01-01

    Purpose To study the effect of autogenous fascia lata sling (AFLS) versus Gore-Tex suspension (GTS) regarding the functional and aesthetic outcomes in patients with bilateral congenital ptosis. Patients and methods A prospective comparative randomized single-center study enrolled 110 patients with bilateral congenital ptosis. One group (n=55) underwent AFLS and the second group (n=55) underwent GTS. Exclusion criteria were good levator function, absent Bell’s phenomenon, and abnormal ocular motility. Follow-up period was 2 years. Functional outcome was measured from digital photos by analysis of upper eyelid margin position relative to the superior limbus and classified as very good (<3 mm), good (3–5 mm), poor (>5 mm), and recurrent. Aesthetic outcome was assessed in terms of lid contour, symmetry of eyelid height, and lid crease presence. Complications were also reported. Results Failure rate (recurrence and complications) was less in AFLS (P=0.035). Symmetrical lid height and good contour were more frequently attained by AFLS (P=0.007 and 0.047, respectively). However, the frequency of very good, good, poor, recurrence, lagopthalmos, ectropion, infection, and formed lid crease individually showed no statistically significant difference (P=0.252, 0.482, 1, 0.489, 0.438, 1, 0.618, and 0.506, respectively). Conclusion AFLS is a better choice in surgery for patients with bilateral congenital ptosis because it has fewer complications and a lesser recurrence rate than GTS. PMID:27022237

  17. Hygrothermal characterization of the viscoelastic properties of Gore-Select® 57 proton exchange membrane

    NASA Astrophysics Data System (ADS)

    Patankar, Kshitish A.; Dillard, David A.; Case, Scott W.; Ellis, Michael W.; Lai, Yeh-Hung; Budinski, Michael K.; Gittleman, Craig S.

    2008-09-01

    When a proton exchange membrane (PEM) based fuel cell is placed in service, hygrothermal stresses develop within the membrane and vary widely with internal operating environment. These hygrothermal stresses associated with hygral contraction and expansion at the operating conditions are believed to be critical in membrane mechanical integrity and durability. Understanding and accurately modeling the viscoelastic constitutive properties of a PEM is important for making hygrothermal stress predictions in the cyclic temperature and humidity environment of operating fuel cells. The tensile stress relaxation moduli of a commercially available PEM, Gore-Select® 57, were obtained over a range of humidities and temperatures. These tests were performed using TA Instruments 2980 and Q800 dynamic mechanical analyzers (DMA), which are capable of applying specified tensile loading conditions on small membrane samples at a given temperature. A special humidity chamber was built in the form of a cup that encloses tension clamps of the DMA. The chamber was inserted in the heating furnace of the DMA and connected to a gas humidification unit by means of plastic tubing through a slot in the chamber. Stress relaxation data over a temperature range of 40 90°C and relative humidity range of 30 90% were obtained. Thermal and hygral master curves were constructed using thermal and hygral shift factors and were used to form a hygrothermal master curve using the time temperature moisture superposition principle. The master curve was also constructed independently using just one shift factor. The hygrothermal master curve was fitted with a 10-term Prony series for use in finite element software. The hygrothermal master curve was then validated using longer term tests. The relaxation modulus from longer term data matches well with the hygrothermal master curve. The long term test showed a plateau at longer times, suggesting an equilibrium modulus.

  18. Applying GORE-TEX technology for rapid contaminant assessments at Fort Gordon, Georgia

    USGS Publications Warehouse

    Falls, Fred W.; Harrelson, Larry G.; Ratliff, W. Hagan; Wellborn, John B.; Landmeyer, James E.

    2010-01-01

    The U.S. Geological Survey, in cooperation with the U.S. Department of the Army at Fort Gordon, Georgia, deployed GORE1 adsorbent samplers along creeks and floodplains to rapidly assess potential contamination at abandoned facilities and in adjacent surface water. The samplers provide screening-level data to determine the presence or absence of volatile organic compounds, semi-volatile organic compounds, and polycyclic aromatic hydrocarbons and were deployed in saturated creek and floodplain sediments adjacent to four abandoned waste-disposal/warfare-training sites. Fuelrelated compounds, not solvents, are the most prevalent organic compounds detected along segments of McCoys Creek adjacent to the 19th Street landfill; South Prong Creek adjacent to the South Prong Creek waste-disposal area; an unnamed tributary to Butler Creek adjacent to the old hospital landfill; and the Brier Creek floodplain adjacent to the Patterson anti-tank range. All 37 samplers deployed in these assessments had detections of total petroleum hydrocarbons ranging from just above 3 (laboratory method detection level) to 344 micrograms per liter. Detections of octane that ranged from 1 to 7.6 micrograms per liter were common in all assessments, except for South Prong Creek. Calculated concentrations of benzene are at or just above the National Primary Drinking Water Standard maximum contaminant level for all samplers deployed in the floodplain at the Patterson anti-tank range. The highest calculated concentration of a specific fuel-related compound was for toluene collected at one sampling site on McCoys Creek adjacent to the 19th Street landfill, but the concentration was below the National Primary Drinking Water Standard. These results are being used by Fort Gordon environmental compliance personnel to decide if further assessments are needed at these abandoned waste-disposal/warfare-training sites

  19. Arrival time and backflow effect

    NASA Astrophysics Data System (ADS)

    Grübl, Gebhard; Kreidl, Sabine; Penz, Markus; Ruggenthaler, Michael

    2006-06-01

    We contrast the average arrival time at x according to the Bohmian mechanics of one dimensional free Schrödinger evolution with the standard quantum mechanical one. For positive momentum wave functions the first cannot be larger than the second one. Equality holds if and only if the wave function does not lead to position probability backflow through x. This position probability backflow has the least upper bound of approximately 0.04. We describe a numerical method to determine this backflow constant, introduced by Bracken and Melloy, more precisely and we illustrate the approximate wave function of maximal backflow.

  20. Long-term performance of GORE-TEX{reg_sign} membrane filter bags at a municipal solid waste combustion facility

    SciTech Connect

    Fritsky, K.J.

    1997-12-31

    This paper describes the performance of particulate emissions control technology used at a 800 ton per day municipal solid waste combustion facility. The technology consists of a pulse jet fabric filter collector equipped with GORE-TEX{reg_sign} membrane/TEFLON B fiberglass fabric filter bags and a lime slurry spray dryer absorber. During compliance emissions testing in 1995, the air pollution control system processed 110,000--121,000 acfm of flue gas delivered through two water wall boiler lines. Total particulate matter emissions averaged 0.003 gr/dscf at 7% O{sub 2} content. Emission levels of low and semi-volatile metals were also measured during the compliance tests. In all cases, these levels were either well below permit levels or below detection limits. Dioxin and furan emissions were measured during the compliance tests and were also found to be below permit levels and applicable federal emission guidelines for municipal waste combustors. This paper presents these emissions data as well as specific information on the performance of the GORE-TEX membrane filter media including pressure differential, permeability, and strength over a service life of five years.

  1. First arrival time surface, estimation of statics

    SciTech Connect

    Chun, J.H.; Jacewitz, C.A.

    1983-09-05

    The problem of obtaining surface consistent statics using first arrival refractions has several phases. To begin with, the first arrivals must be picked in some reasonable, consistent fashion. Next, appropriate techniques must be used to solve for surface-consistent statics. Finally, the interpreter must be provided with an evaluation of the quality of the estimated statics. First arrival refractions are part of reflection seismic data. Early seismic reflection work used first arrival refractions for weathering static corrections. With the advent of the common midpoint (CMP) method, first arrivals lost their predominance in statics to correlation techniques within CMP gathers. However, the increasing use of a large number of receivers and a small group interval has made first arrival statics more reliable. In addition, recent work has helped to revitalize interest in the use of first arrival refractions for surface-consistent static corrections.

  2. STS-93: Chandra Crew Arrival

    NASA Technical Reports Server (NTRS)

    1999-01-01

    The primary objective of the STS-93 mission was to deploy the Advanced X-ray Astrophysical Facility, which had been renamed the Chandra X-ray Observatory in honor of the late Indian-American Nobel Laureate Subrahmanyan Chandrasekhar. The mission was launched at 12:31 on July 23, 1999 onboard the space shuttle Columbia. The mission was led by Commander Eileen Collins. The crew was Pilot Jeff Ashby and Mission Specialists Cady Coleman, Steve Hawley and Michel Tognini from the Centre National d'Etudes Spatiales (CNES). This videotape shows the astronauts arrival at Kennedy Space Center a week before the launch. Each of the astronauts gives brief remarks, beginning with Eileen Collins, the first woman to command a space mission.

  3. Iterative direction-of-arrival estimation with wideband chirp signals

    NASA Astrophysics Data System (ADS)

    Wang, Genyuan; Xia, Xiang-Gen; Chen, Victor C.

    1999-11-01

    Amin et. al. recently developed a time-frequency MUSIC algorithm with narrow band models for the estimation of direction of arrival (DOA) when the source signals are chirps. In this research, we consider wideband models. The joint time-frequency analysis is first used to estimate the chirp rates of the source signals and then the DOA is estimated by the MUSIC algorithm with an iterative approach.

  4. NASA Dual Precipitation Radar Arrives at Goddard

    NASA Video Gallery

    The Dual-frequency Precipitation Radar (DPR) built by the Japan Aerospace Exploration Agency (JAXA) for the Global Precipitation Measurement (GPM) mission's Core Observatory arrived on Friday, Marc...

  5. Recognizing subtle evidence for silicic magma derivation from petrochemically-similar arc crust: Isotopic and chemical evidence for the bimodal volcanic series of Gorely Volcanic Center, Kamchatka, Russia

    NASA Astrophysics Data System (ADS)

    Seligman, A. N.; Bindeman, I. N.; Ellis, B. S.; Ponomareva, V.; Leonov, V.

    2012-12-01

    The Kamchatka Peninsula is home to some of the most prolific subduction related volcanic activity in the world. Gorely caldera and its central volcano are located in the rear of its currently active Eastern Volcanic Front. Recent work determined the presence of explosive ignimbrite eruptions sourced from Gorely volcano during the Pleistocene. We studied 32 eruptive units, including tephrochronologically-dated Holocene tephra, stratigraphically-arranged ignimbrites, as well as pre- and post-caldera lavas. We analyzed oxygen isotope ratios of pyroxene and plagioclase grains by laser fluorination, and major and trace element compositions of whole rocks. In addition, we determined 87Sr/86Sr and 143Nd/144Nd ratios of caldera-forming ignimbrite eruptions. Chemical compositions show that Gorely eruptive units range from basalt to basaltic andesite in the "Pra-Gorely" stages prior to caldera formation and the modern Gorely stages forming its current edifice. In contrast, eruptive material from earlier ignimbrites exposed at Opasny Ravine consists primarily of dacite. Whole rock analyses for Gorely indicate that silicic rocks and ignimbrites volumetrically dominate all other products, forming separate bimodal peaks in our SiO2-frequency diagram. In addition, trace element concentrations and ratios define two trends, one for more silicic and another for more mafic material. δ18Omelt values range from a low of 4.85 up to 6.22‰, where the lowest value was found in the last caldera forming eruption, suggesting incorporation of hydrothermally-altered material from earlier eruptions. 87Sr/86Sr and 143Nd/144Nd ratios range from 0.70328 to 0.70351 and from 0.51303 to 0.51309 respectively, with higher and more diverse values being characteristic of earlier ignimbrite units; again suggesting incorporation of surrounding crustal material. In contrast to these results, MELTS modeling using a variety of likely primitive basalts from Gorely shows it is possible to obtain silicic

  6. 8 CFR 232.3 - Arriving aliens.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 8 Aliens and Nationality 1 2013-01-01 2013-01-01 false Arriving aliens. 232.3 Section 232.3 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DETENTION OF ALIENS FOR PHYSICAL AND MENTAL EXAMINATION § 232.3 Arriving aliens. When a district director has reasonable...

  7. 8 CFR 232.3 - Arriving aliens.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 8 Aliens and Nationality 1 2012-01-01 2012-01-01 false Arriving aliens. 232.3 Section 232.3 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DETENTION OF ALIENS FOR PHYSICAL AND MENTAL EXAMINATION § 232.3 Arriving aliens. When a district director has reasonable...

  8. 8 CFR 232.3 - Arriving aliens.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 8 Aliens and Nationality 1 2011-01-01 2011-01-01 false Arriving aliens. 232.3 Section 232.3 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DETENTION OF ALIENS FOR PHYSICAL AND MENTAL EXAMINATION § 232.3 Arriving aliens. When a district director has reasonable...

  9. 8 CFR 232.3 - Arriving aliens.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 8 Aliens and Nationality 1 2010-01-01 2010-01-01 false Arriving aliens. 232.3 Section 232.3 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DETENTION OF ALIENS FOR PHYSICAL AND MENTAL EXAMINATION § 232.3 Arriving aliens. When a district director has reasonable...

  10. The Galileo arrival date selection process

    NASA Technical Reports Server (NTRS)

    Ludwinski, Jan M.; Gershman, Robert

    1988-01-01

    The Galileo arrival date selection process has culminated in the selection of December 7,1995. This arrival date will provide excellent science opportunities at Jupiter as well as the first spacecraft reconnaissance ever of not one, but two asteroids during the cruise to Jupiter.

  11. 8 CFR 232.3 - Arriving aliens.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 8 Aliens and Nationality 1 2014-01-01 2014-01-01 false Arriving aliens. 232.3 Section 232.3 Aliens and Nationality DEPARTMENT OF HOMELAND SECURITY IMMIGRATION REGULATIONS DETENTION OF ALIENS FOR PHYSICAL AND MENTAL EXAMINATION § 232.3 Arriving aliens. When a district director has reasonable...

  12. Fluctuating arrivals of short-range acoustic data.

    PubMed

    Park, Cheolsoo; Seong, Woojae; Gerstoft, Peter; Hodgkiss, William S

    2011-01-01

    Geoacoustic inversion using fluctuating signal observations can be challenging. The origin of these fluctuations needs to be understood so the signals can be used appropriately. A set of experiments [Tang et al., Oceanogr. 20(4), 156-167 (2007)] was carried out in shallow water near the New Jersey shelf break in summer 2006. Significant fluctuations in the direct path and surface-reflected arrivals of short-range chirp transmissions (1.1-2.9 kHz) were observed on a vertical line array. This paper explains the origin of these signal fluctuations through analysis of the arrival amplitudes. It is shown that the strong thermocline combined with an oscillating source motion due to ocean surface waves results in the signal fluctuations. PMID:21302991

  13. New Expedition 32 Trio Arrives at Station

    NASA Video Gallery

    Expedition 32 Flight Engineers Suni Williams, Yuri Malenchenko and Aki Hoshide have arrived at the International Space Station after two days in orbit. The new trio docked its Soyuz TMA-05M spacecr...

  14. New Crew Members Arrive at Station

    NASA Video Gallery

    The Expedition 28 crew expanded to six members with the arrival of Flight Engineers Mike Fossum, Sergei Volkov and Satoshi Furukawa. The new trio docked to the International Space Station in the So...

  15. Pair bonds: arrival synchrony in migratory birds.

    PubMed

    Gunnarsson, T G; Gill, J A; Sigurbjörnsson, T; Sutherland, W J

    2004-10-01

    Synchronous arrival of pairs of migratory birds at their breeding grounds is important for maintaining pair bonds and is achieved by pairs that remain together all year round. Here we show that arrival is also synchronized in paired individuals of a migratory shorebird, the black-tailed godwit (Limosa limosa islandica), even though they winter hundreds of kilometres apart and do not migrate together. The mechanisms required to achieve this synchrony and prevent 'divorce' illustrate the complexity of migratory systems. PMID:15470417

  16. "That's How We Roll": A Case Study of a Recently Arrived Refugee Student in an Urban High School

    ERIC Educational Resources Information Center

    Roxas, Kevin; Roy, Laura

    2012-01-01

    This critical case study of one, Somali Bantu male high school student illuminates the struggle for recently arrived refugees at the high school level. Few educational research studies describe how recently arrived refugee students and their families make their transition to US schools (Ngo et al. in "Hmong Stud J" 8:1-35, 2007; Hones and Cha in…

  17. Quantum arrival time for open systems

    SciTech Connect

    Yearsley, J. M.

    2010-07-15

    We extend previous work on the arrival time problem in quantum mechanics, in the framework of decoherent histories, to the case of a particle coupled to an environment. The usual arrival time probabilities are related to the probability current, so we explore the properties of the current for general open systems that can be written in terms of a master equation of the Lindblad form. We specialize to the case of quantum Brownian motion, and show that after a time of order the localization time of the current becomes positive. We show that the arrival time probabilities can then be written in terms of a positive operator-valued measure (POVM), which we compute. We perform a decoherent histories analysis including the effects of the environment and show that time-of-arrival probabilities are decoherent for a generic state after a time much greater than the localization time, but that there is a fundamental limitation on the accuracy {delta}t, with which they can be specified which obeys E{delta}t>>({h_bar}/2{pi}). We confirm that the arrival time probabilities computed in this way agree with those computed via the current, provided there is decoherence. We thus find that the decoherent histories formulation of quantum mechanics provides a consistent explanation for the emergence of the probability current as the classical arrival time distribution, and a systematic rule for deciding when probabilities may be assigned.

  18. Empirical estimation of the arrival time of ICME Shocks

    NASA Astrophysics Data System (ADS)

    Shaltout, Mosalam

    Empirical estimation of the arrival time of ICME Shocks Mosalam Shaltout1 ,M.Youssef 1and R.Mawad2 1 National Research Institute of Astronomy and Geophysics (NRIAG) ,Helwan -Cairo-Egypt Email: mosalamshaltout@hotmail.com 2 Faculty of Science-Monifiia University-Physics Department-Shiben Al-Koum -Monifiia-Egypt We are got the Data of the SSC events from Preliminary Reports of the ISGI (Institut de Physique du Globe, France) .Also we are selected the same CME interval 1996-2005 from SOHO/LASCO/C2.We have estimated the arrival time of ICME shocks during solar cycle 23rd (1996-2005), we take the Sudden storm commencement SSC as a indicator of the arrival of CMEs at the Earth's Magnetosphere (ICME).Under our model ,we selected 203 ICME shock-SSC associated events, we got an imperial relation between CME velocity and their travel time, from which we obtained high correlation between them, R=0.75.

  19. F-16: The Arrival of NASA 516

    NASA Technical Reports Server (NTRS)

    1991-01-01

    NASA 516, NASA Langley's F-16A Research Support Aircraft is shown on arrival at the center in late summer of 1991. Delivered from Eglin AFB, NASA 516 provided an advanced fighter capability for Langley research pilots in support of advanced Fighter Research Programs at the center.

  20. Wake Turbulence Mitigation for Arrivals (WTMA)

    NASA Technical Reports Server (NTRS)

    Williams, Daniel M.; Lohr, Gary W.; Trujillo, Anna C.

    2008-01-01

    The preliminary Wake Turbulence Mitigation for Arrivals (WTMA) concept of operations is described in this paper. The WTMA concept provides further detail to work initiated by the Wake Vortex Avoidance System Concept Evaluation Team and is an evolution of the Wake Turbulence Mitigation for Departure concept. Anticipated benefits about reducing wake turbulence separation standards in crosswind conditions, and candidate WTMA system considerations are discussed.

  1. 19 CFR 12.113 - Arrival of shipment.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Arrival of shipment. 12.113 Section 12.113 Customs... SPECIAL CLASSES OF MERCHANDISE Pesticides and Devices § 12.113 Arrival of shipment. (a) Notice of arrival presented. Upon the arrival of a shipment of pesticides or devices, the importer or his agent shall...

  2. Evidences for high gas content beneath the Gorely volcano in Kamchatka (Russia) based on very low Vp/Vs ratio revealed from local earthquake tomography

    NASA Astrophysics Data System (ADS)

    Koulakov, Ivan; Kuznetsov, Pavel; Ilyich Gordeev, Evgeny; Nikolaevich Chebrov, Viktor

    2015-04-01

    The Gorely volcano, which is located at distance of 70 km from Petropavlovsk-Kamchatsky, is one of the most active volcanoes in Kamchatka. Nowadays, a large fumarole inside the volcano crater ejects approximately 11,000 tons of gases daily. During the last thousands years, eruptions in Gorely were mostly basaltic that determined the shield type of the volcano. However, a large caldera of ~20 km diameter dated at approximately 30,000 years indicates that the volcano has high explosive potential. To identify the feeding mechanisms and to assess the possibility of future large eruptions, scientists from IPGG, Novosibirsk, have deployed the first temporary seismic network on the Gorely volcano. This network consisted of 21 uniformly distributed seismic stations that operated for one year from August 2013 to July 2014. Most of the time during the observation period, dozens to hundreds events per day and frequent tremors were recorded which indicated significant activity inside the volcano. As a result of preliminary processing, almost 300 events were identified during only several weeks of recording. The available distributions of events and stations enables fairly high resolution in the derived seismic velocity models, as demonstrated by a number of synthetic tests. A striking feature of the tomographic inversion is an average ratio of Vp/Vs=1.53, which is an exceptionally low compared to other volcanic areas. We propose that this low Vp/Vs ratio is a signature of high content of gases beneath the volcano. Higher values of Vp/Vs beneath the crater below ~2 km depth might indicate some presence of liquid water, which comes from deeper sources and is transformed to the steam at shallower levels due to the decompression. It appears that Gorely is a kind of a huge steam boiler covered with a solid cover consisting of previously erupted basaltic layers. The fumarole inside the crater plays the role of safety valve which prevents the accumulation of excessive pressure inside

  3. STS-76 crew after arrival at SLF

    NASA Technical Reports Server (NTRS)

    1996-01-01

    STS-76 Mission Commander Kevin P. Chilton (left); Mission Specialists Linda M. Godwin and Shannon W. Lucid; Pilot Richard A. Searfoss and Mission Specialist Michael 'Rich' Clifford chat shortly after their arrival at KSC's Shuttle Landing Facility. Not shown is Payload Commander Ronald M. Sega. The astronauts' late-night arrival allows them to maintain the shift in their waking and sleeping hours, altered in preparation for their upcoming spaceflight. The Space Shuttle Atlantis is scheduled to lift off on STS-76 around 3:35 a.m. EST, March 21, with one of the primary mission objectives being the third docking between the U.S. Shuttle and the Russian Space Station Mir.

  4. Semiautomated Management Of Arriving Air Traffic

    NASA Technical Reports Server (NTRS)

    Erzberger, Heinz; Nedell, William

    1992-01-01

    System of computers, graphical workstations, and computer programs developed for semiautomated management of approach and arrival of numerous aircraft at airport. System comprises three subsystems: traffic-management advisor, used for controlling traffic into terminal area; descent advisor generates information integrated into plan-view display of traffic on monitor; and final-approach-spacing tool used to merge traffic converging on final approach path while making sure aircraft are properly spaced. Not intended to restrict decisions of air-traffic controllers.

  5. STS-85 Crew Arrival for TCDT

    NASA Technical Reports Server (NTRS)

    1997-01-01

    The Space Shuttle Mission STS-85 crew arrives at the Shuttle Landing Facility for their mission's Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. They are (from left): Mission Specialist Stephen K. Robinson; Payload Commander N. Jan Davis; Mission Specialist Robert L. Curbeam; Commander Curtis L. Brown, Jr.; Pilot Kent V. Rominger; and Payload Specialist Bjarni V. Tryggvason. The liftoff for STS-85 is targeted for August 7, 1997.

  6. STS-76 crew after arrival at SLF

    NASA Technical Reports Server (NTRS)

    1996-01-01

    STS-76 Mission Commander Kevin P. Chilton (second from left) chats with Mission Specialist Shannon W. Lucid (left); Pilot Richard A. Searfoss and Mission Specialist Michael 'Rich' Clifford shortly after their arrival at KSC's Shuttle Landing Facility. The Space Shuttle Atlantis is scheduled to lift off on STS-76 around 3:35 a.m. EST, March 21, with one of the primary mission objectives being the third docking between the U.S. Shuttle and the Russian Space Station Mir.

  7. Gene Analysis Pinpoints Zika's Arrival in the Americas

    MedlinePlus

    ... html Gene Analysis Pinpoints Zika's Arrival in the Americas Findings suggest one person carried the virus to ... News) -- The Zika virus likely arrived in the Americas between May and December 2013, more than a ...

  8. 19 CFR 122.31 - Notice of arrival.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... give advance notice of arrival. (b) Exceptions for scheduled aircraft of a scheduled airline. Advance notice is not required for aircraft of a scheduled airline arriving under a regular schedule. The...

  9. STS-93: Crew Arrival and PR Location

    NASA Technical Reports Server (NTRS)

    1999-01-01

    The primary objective of the STS-93 mission was to deploy the Advanced X-ray Astrophysical Facility, which had been renamed the Chandra X-ray Observatory in honor of the late Indian-American Nobel Laureate Subrahmanyan Chandrasekhar. The mission was launched at 12:31 on July 23, 1999 onboard the space shuttle Columbia. The mission was led by Commander Eileen Collins. The crew was Pilot Jeff Ashby and Mission Specialists Cady Coleman, Steve Hawley and Michel Tognini from the Centre National d'Etudes Spatiales (CNES). This videotape shows the astronauts arriving at Kennedy and an inspection in the clean room.

  10. Target assignment of simultaneous arrival for UAVs

    NASA Astrophysics Data System (ADS)

    Xia, Jie; Gao, Jinyuan

    2003-09-01

    The Extend Hungary Method (EHM) is presented to solve the assignment problem that the number of UAVs is larger than that of targets. The target assignment is modeling and the motivations are minimize the distance of the UAV fleet, maximize the survivability of the UAV fleet, maximize the number of UAVs assigned to each target and maximize the number of target attacked. An algorithm for arriving simultaneously is presented by combination of the EHM. Simulation results demonstrating the feasibility of the approach are presented. The approach could be easily applied into other multi-robot cooperative mission.

  11. An Exploratory Study of Runway Arrival Procedures: Time Based Arrival and Self-Spacing

    NASA Technical Reports Server (NTRS)

    Houston, Vincent E.; Barmore, Bryan

    2009-01-01

    The ability of a flight crew to deliver their aircraft to its arrival runway on time is important to the overall efficiency of the National Airspace System (NAS). Over the past several years, the NAS has been stressed almost to its limits resulting in problems such as airport congestion, flight delay, and flight cancellation to reach levels that have never been seen before in the NAS. It is predicted that this situation will worsen by the year 2025, due to an anticipated increase in air traffic operations to one-and-a-half to three times its current level. Improved arrival efficiency, in terms of both capacity and environmental impact, is an important part of improving NAS operations. One way to improve the arrival performance of an aircraft is to enable the flight crew to precisely deliver their aircraft to a specified point at either a specified time or specified interval relative to another aircraft. This gives the flight crew more control to make the necessary adjustments to their aircraft s performance with less tactical control from the controller; it may also decrease the controller s workload. Two approaches to precise time navigation have been proposed: Time-Based Arrivals (e.g., required times of arrival) and Self-Spacing. Time-Based Arrivals make use of an aircraft s Flight Management System (FMS) to deliver the aircraft to the runway threshold at a given time. Self-Spacing enables the flight crew to achieve an ATC assigned spacing goals at the runway threshold relative to another aircraft. The Joint Planning and Development Office (JPDO), a multi-agency initiative established to plan and coordinate the development of the Next Generation Air Transportation System (NextGen), has asked for data for both of these concepts to facilitate future research and development. This paper provides a first look at the delivery performance of these two concepts under various initial and environmental conditions in an air traffic simulation environment.

  12. 19 CFR 148.2 - Residence status of arriving persons.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Residence status of arriving persons. (a) General. Persons arriving from foreign countries shall be divided... 19 Customs Duties 2 2010-04-01 2010-04-01 false Residence status of arriving persons. 148.2... established a home elsewhere. For this purpose, the residence of a wife shall be deemed to be that of...

  13. 19 CFR 122.118 - Exportation from port of arrival.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Exportation from port of arrival. 122.118 Section... Exportation from port of arrival. (a) Application. Transit air cargo may be transferred for exportation from any port of arrival under this section. The port director may require any supervision necessary...

  14. 19 CFR 122.154 - Notice of arrival.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Notice of arrival. 122.154 Section 122.154 Customs... AIR COMMERCE REGULATIONS Flights to and From Cuba § 122.154 Notice of arrival. (a) Application. All aircraft entering the U.S. from Cuba must give advance notice of arrival, unless it is an Office of...

  15. 19 CFR 122.31 - Notice of arrival.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Notice of arrival. 122.31 Section 122.31 Customs... AIR COMMERCE REGULATIONS Landing Requirements § 122.31 Notice of arrival. (a) Application. Except as... give advance notice of arrival. (b) Exceptions for scheduled aircraft of a scheduled airline....

  16. 19 CFR 122.154 - Notice of arrival.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Notice of arrival. 122.154 Section 122.154 Customs... AIR COMMERCE REGULATIONS Flights to and From Cuba § 122.154 Notice of arrival. (a) Application. All aircraft entering the U.S. from Cuba must give advance notice of arrival, unless it is an Office of...

  17. STS-81 Crew Arrival at SLF

    NASA Technical Reports Server (NTRS)

    1997-01-01

    The STS-81 flight crew conducts a press briefing on the runway of KSC Shuttle Landing Facility after they arrive at the space center for the final countdown preparations for the fifth Shuttle-Mir docking mission. They are (from left): Mission Commander Michael A. Baker; Pilot Brent W. Jett, Jr.; and Mission Specialists Peter J. K. 'Jeff' Wisoff; John M. Grunsfeld, Marsha S. Ivins, and J.M. 'Jerry' Linenger. The 10-day mission will feature the transfer of Linenger to Mir to replace astronaut John Blaha, who has been on the orbital laboratory since Sept. 19, 1996 after arrival there during the STS-79 mission. During STS- 81, Shuttle and Mir crews will conduct risk mitigation, human life science, microgravity and materials processing experiments that will provide data for the design, development and operation of the International Space Station. The primary payload is the SPACEHAB-DM double module will provide space for more than 2,000 pounds of hardware, food and water that will be transferred into the Russian space station during five days of docking operations. The SPACEHAB will also be used to return experiment samples from the Mir to Earth for analysis and for microgravity experiments during the mission.

  18. STS-81 Crew Arrival at SLF

    NASA Technical Reports Server (NTRS)

    1997-01-01

    The STS-81 flight crew poses on the runway of KSC Shuttle Landing Facility after they arrive at the space center for the final countdown preparations for the fifth Shuttle-Mir docking mission. They are (from left): Mission Commander Michael A. Baker; Pilot Brent W. Jett, Jr.; and Mission Specialists Peter J. K. 'Jeff' Wisoff; John M. Grunsfeld, Marsha S. Ivins, and J.M. 'Jerry' Linenger. The 10-day mission will feature the transfer of Linenger to Mir to replace astronaut John Blaha, who has been on the orbital laboratory since Sept. 19, 1996 after arrival there during the STS-79 mission. During STS-81, Shuttle and Mir crews will conduct risk mitigation, human life science, microgravity and materials processing experiments that will provide data for the design, development and operation of the International Space Station. The primary payload is the SPACEHAB-DM double module will provide space for more than 2,000 pounds of hardware, food and water that will be transferred into the Russian space station during five days of docking operations. The SPACEHAB will also be used to return experiment samples from the Mir to Earth for analysis and for microgravity experiments during the mission.

  19. NASA T-34C arrival at Dryden

    NASA Technical Reports Server (NTRS)

    1996-01-01

    A NASA T-34C aircraft, used for safety chase, is viewed by personnel on the ramp at the Dryden Flight Research Center, Edwards, California, after its arrival in June of 1996. The aircraft was previously used at the Lewis Research Center in propulsion experiments involving turboprop engines, and is now used as a chase aircraft at Dryden for smaller and slower research projects. Chase aircraft accompany research flights for photography and video purposes, and also as support for safety and research. The T-34 is used mainly for smaller remotely piloted vehicles which fly slower than NASA's F-18's, used for larger scale projects. The T-34C, built by Beech, carries a crew of 2 and is nicknamed the Mentor.

  20. STS-99 Commander Kregel arrives for launch

    NASA Technical Reports Server (NTRS)

    2000-01-01

    STS-99 Commander Kevin Kregel arrives at KSC aboard a T-38 jet aircraft to prepare for launch of Endeavour Jan. 31 at 12:47 p.m. EST. Over the next few days, the crew will review mission procedures, conduct test flights in the Shuttle Training Aircraft and undergo routine preflight medical exams. STS-99 is the Shuttle Radar Topography Mission, which will chart a new course, using two antennae and a 200-foot-long section of space station- derived mast protruding from the payload bay to produce unrivaled 3-D images of the Earth's surface. The result of the Shuttle Radar Topography Mission could be close to 1 trillion measurements of the Earth's topography. Besides contributing to the production of better maps, these measurements could lead to improved water drainage modeling, more realistic flight simulators, better locations for cell phone towers, and enhanced navigation safety.

  1. STS-99 Pilot Gorie arrives for launch

    NASA Technical Reports Server (NTRS)

    2000-01-01

    STS-99 Pilot Dominic Gorie arrives at KSC aboard a T-38 jet aircraft to prepare for launch of Endeavour Jan. 31 at 12:47 p.m. EST. Over the next few days, the crew will review mission procedures, conduct test flights in the Shuttle Training Aircraft and undergo routine preflight medical exams. STS-99 is the Shuttle Radar Topography Mission, which will chart a new course, using two antennae and a 200-foot-long section of space station- derived mast protruding from the payload bay to produce unrivaled 3-D images of the Earth's surface. The result of the Shuttle Radar Topography Mission could be close to 1 trillion measurements of the Earth's topography. Besides contributing to the production of better maps, these measurements could lead to improved water drainage modeling, more realistic flight simulators, better locations for cell phone towers, and enhanced navigation safety.

  2. P-1 truss arrival at KSC

    NASA Technical Reports Server (NTRS)

    2000-01-01

    The P-1 truss, a component of the International Space Station, arrives inside the RLV hangar, located near the Shuttle Landing Facility at KSC. Approaching bad weather caused the detour as a precaution. The truss will eventually be transferred to the Operations and Checkout Building for processing. The P-1 truss, scheduled to fly in spring of 2002, is part of a total 10-truss, girder-like structure on the Station that will ultimately extend the length of a football field. Astronauts will attach the 14-by- 15 foot structure to the port side of the center truss, S0, during the spring assembly flight. The 33,000-pound P-1 will house the thermal radiator rotating joint (TRRJ) that will rotate the Station's radiators away from the sun to increase their maximum cooling efficiency.

  3. The stratospheric arrival pair in infrasound propagation.

    PubMed

    Waxler, Roger; Evers, Läslo G; Assink, Jelle; Blom, Phillip

    2015-04-01

    The ideal case of a deep and well-formed stratospheric duct for long range infrasound propagation in the absence of tropospheric ducting is considered. A canonical form, that of a pair of arrivals, for ground returns of impulsive signals in a stratospheric duct is determined. The canonical form is derived from the geometrical acoustics approximation, and is validated and extended through full wave modeling. The full caustic structure of the field of ray paths is found and used to determine phase relations between the contributions to the wavetrain from different propagation paths. Finally, comparison with data collected from the 2005 fuel gas depot explosion in Buncefield, England is made. The correspondence between the theoretical results and the observations is shown to be quite good. PMID:25920837

  4. Evaluating the time and temperature dependent biaxial strength of Gore-Select ® series 57 proton exchange membrane using a pressure loaded blister test

    NASA Astrophysics Data System (ADS)

    Grohs, Jacob R.; Li, Yongqiang; Dillard, David A.; Case, Scott W.; Ellis, Michael W.; Lai, Yeh-Hung; Gittleman, Craig S.

    Temperature and humidity fluctuations in operating fuel cells impose significant biaxial stresses in the constrained proton exchange membranes (PEMs) of a fuel cell stack. The strength of the PEM, and its ability to withstand cyclic environment-induced stresses, plays an important role in membrane integrity and consequently, fuel cell durability. In this study, a pressure loaded blister test is used to characterize the biaxial strength of Gore-Select ® series 57 over a range of times and temperatures. Hencky's classical solution for a pressurized circular membrane is used to estimate biaxial strength values from burst pressure measurements. A hereditary integral is employed to construct the linear viscoelastic analog to Hencky's linear elastic exact solution. Biaxial strength master curves are constructed using traditional time-temperature superposition principle techniques and the associated temperature shift factors show good agreement with shift factors obtained from constitutive (stress relaxation) and fracture (knife slit) tests of the material.

  5. The Upside-Down Gore Excluder Limb and Double-Barrel Sandwich Technique for Penetrating Aortic Ulcer and Iliac Aneurysm Exclusion

    PubMed Central

    Kim, Hyung-Kee; Song, Incheol; Huh, Seung

    2016-01-01

    Endovascular aneurysm repair has become the first-line treatment for abdominal aortic aneurysms and iliac artery aneurysms in recent years. However, the diameter of the infrarenal aorta is larger than that of the aortic bifurcation, especially with small aortic diameters, for which a reversed tapered device is necessary. We describe the off-label use of the upside-down Gore Excluder limb and double-barrel sandwich technique for the treatment of a penetrating abdominal aortic ulcer with a large common iliac artery aneurysm. These techniques offer an easy endovascular approach for excluding an aneurysm in selected patients. However, this technique is outside the standard instructions for use, therefore careful planning and long-term follow-up are mandatory. PMID:27051656

  6. A model of seismic coda arrivals to suppress spurious events.

    NASA Astrophysics Data System (ADS)

    Arora, N.; Russell, S.

    2012-04-01

    We describe a model of coda arrivals which has been added to NET-VISA (Network processing Vertically Integrated Seismic Analysis) our probabilistic generative model of seismic events, their transmission, and detection on a global seismic network. The scattered energy that follows a seismic phase arrival tends to deceive typical STA/LTA based arrival picking software into believing that a real seismic phase has been detected. These coda arrivals which tend to follow all seismic phases cause most network processing software including NET-VISA to believe that multiple events have taken place. It is not a simple matter of ignoring closely spaced arrivals since arrivals from multiple events can indeed overlap. The current practice in NET-VISA of pruning events within a small space-time neighborhood of a larger event works reasonably well, but it may mask real events produced in an after-shock sequence. Our new model allows any seismic arrival, even coda arrivals, to trigger a subsequent coda arrival. The probability of such a triggered arrival depends on the amplitude of the triggering arrival. Although real seismic phases are more likely to generate such coda arrivals. Real seismic phases also tend to generate coda arrivals with more strongly correlated parameters, for example azimuth and slowness. However, the SNR (Signal to Noise Ratio) of a coda arrival immediately following a phase arrival tends to be lower because of the nature of the SNR calculation. We have calibrated our model on historical statistics of such triggered arrivals and our inference accounts for them while searching for the best explanation of seismic events their association to the arrivals and the coda arrivals. We have tested our new model on one week of global seismic data spanning March 22, 2009 to March 29, 2009. Our model was trained on two and half months of data from April 5, 2009 to June 20, 2009. We use the LEB bulletin produced by the IDC (International Data Center) as the ground truth

  7. Confined quantum time of arrival for the vanishing potential

    SciTech Connect

    Galapon, Eric A.; Caballar, Roland F.; Bahague, Ricardo

    2005-12-15

    We give full account of our recent report in E. A. Galapon, R. Caballar, and R. Bahague, Phys. Rev. Lett. 93, 180406 (2004), where it is shown that formulating the free quantum time of arrival problem in a segment of the real line suggests rephrasing the quantum time of arrival problem to finding a complete set of states that evolve to unitarily arrive at a given point at a definite time. For a spatially confined particle, here it is shown explicitly that the problem admits a solution in the form of an eigenvalue problem of a class of compact and self-adjoint time of arrival operators derived by a quantization of the classical time of arrival. The eigenfunctions of these operators are numerically demonstrated to unitarily arrive at the origin at their respective eigenvalues.

  8. P-wave arrival times for the 1991 racha, Georgia earthquake sequence at stations of a test, sparse network

    SciTech Connect

    Myers, S C; Schultz, C A; Ryall, F

    2000-02-02

    The following arrival information is a supplement to Myers and Schultz (2000). Myers and Schultz (2000) demonstrate the improvement in sparse-network location that can be achieved by using travel-time corrections determined with a Bayesian Kriging algorithm (Schultz et al., 1998). Precise, benchmark locations are provided by a local aftershock study of the 1991 Racha, Georgia earthquake sequence in the Caucasus Mountains (Fuenzalida et al., 1997). A test network is used to relocate the aftershocks with and without travel-time corrections. The test network is meant to represent a typical International Monitoring System configuration, with 6 stations at regional to near teleseismic distances (less then 30{sup o} from the epicenter). The following arrival-time data help to facilitate the reproduction of Myers and Schultz (2000). The arrival picks were obtained from the International Seismic Center (ISC) (openly available) and a Lawrence Livermore National Laboratory (LLNL) analyst (Flori Ryan). Table 1 lists the arrivals in epic time (time since January 1, 1970). The author of the arrival pick is listed as either ''flori'' or ''-'', where ''-'' indicates ISC. Table 2 lists the hypocenter information determined in the local aftershock study of Fuenzalida et al. (1997), and Table 3 lists the station information for the Racha test network. Fields in all tables are described in the CSS3.O database schema.

  9. Time Variation of Cosmic Ray Arrival Directions

    NASA Astrophysics Data System (ADS)

    Corbett, Henry; Desiati, P.

    2014-01-01

    Experimental data from the IceCube Neutrino Observatory have been used to characterize the anisotropy in the arrival directions of muons produced in cosmic ray air showers. The anisotropy can be fairly well described as a superposition of a dipole and quadrupole of unknown origin in celestial equatorial coordinates. It is also expected to be described as a dipole associated with the Compton-Getting effect in a coordinate system fixed with respect to the Sun. We utilized IceCube data collected from 2008 through 2011, containing 3.69 x 10^10 events with a median cosmic ray particle energy of 20 TeV. We limited our analysis to data from four azimuthal regions, allowing the rotation of the Earth to trace out a periodic signal. We used a Lomb-Scargle periodogram to approximate a frequency spectrum from the event rates. The frequency spectrum contained four peaks with a significance level greater than 5σ, including a peak at 0.997 day^-1 that is consistent with a sideband caused by modulation of the solar dipole. If further analysis confirms this modulation, interference between the solar and sidereal time frames will need to be considered in future analyses of the anisotropy. This work was partially supported by the National Science Foundation's REU program through NSF Award AST-1004881 to the University of Wisconsin-Madison.

  10. Forecasting Wave Amplitudes after the Arrival of a Tsunami

    NASA Astrophysics Data System (ADS)

    Nyland, David; Huang, Paul

    2014-12-01

    The destructive Pacific Ocean tsunami generated off the east coast of Honshu, Japan, on 11 March 2011 prompted the West Coast and Alaska Tsunami Warning Center (WCATWC) to issue a tsunami warning and advisory for the coastal regions of Alaska, British Columbia, Washington, Oregon, and California. Estimating the length of time the warning or advisory would remain in effect proved difficult. To address this problem, the WCATWC developed a technique to estimate the amplitude decay of a tsunami recorded at tide stations within the Warning Center's Area of Responsibly (AOR). At many sites along the West Coast of North America, the tsunami wave amplitudes will decay exponentially following the arrival of the maximum wave ( Mofjeld et al., Nat Hazards 22:71-89, 2000). To estimate the time it will take before wave amplitudes drop to safe levels, the real-time tide gauge data are filtered to remove the effects of tidal variations. The analytic envelope is computed and a 2 h sequence of amplitude values following the tsunami peak is used to obtain a least squares fit to an exponential function. This yields a decay curve which is then combined with an average West Coast decay function to provide an initial tsunami amplitude-duration forecast. This information may then be provided to emergency managers to assist with response planning.

  11. AIMBAT: A Python/Matplotlib Tool for Measuring Teleseismic Arrival Times

    NASA Astrophysics Data System (ADS)

    Lou, X.; van der Lee, S.; Lloyd, S.

    2013-12-01

    Python is an open-source, platform-independent, and object-oriented scripting language. It became more popular in the seismologist community since the appearance of ObsPy (Beyreuther et al. 2010, Megies et al. 2011), which provides a powerful framework for seismic data access and processing. This study introduces a new Python-based tool named AIMBAT (Automated and Interactive Measurement of Body-wave Arrival Times) for measuring teleseismic body-wave arrival times on large-scale seismic event data (Lou et al. 2013). Compared to ObsPy, AIMBAT is a lighter tool that is more focused on a particular aspect of seismic data processing. It originates from the widely used MCCC (Multi-Channel Cross-Correlation) method developed by VanDecar and Crosson (1990). On top of the original MCCC procedure, AIMBAT is automated in initial phase picking and is interactive in quality control. The core cross-correlation function is implemented in Fortran to boost up performance in addition to Python. The GUI (graphical user interface) of AIMBAT depends on Matplotlib's GUI-neutral widgets and event-handling API. A number of sorting and (de)selecting options are designed to facilitate the quality control of seismograms. By using AIMBAT, both relative and absolute teleseismic body-wave arrival times are measured. AIMBAT significantly improves efficiency and quality of the measurements. User interaction is needed only to pick the target phase arrival and to set a time window on the array stack. The package is easy to install and use, open-source, and is publicly available. Graphical user interface of AIMBAT.

  12. Evaluation of Post-Arrival Programs and Services.

    ERIC Educational Resources Information Center

    Australian Inst. of Multicultural Affairs, Melbourne (Australia).

    This book assesses the effectiveness of recommendations implemented after the release of the Australian government's "Report of the Review of Post-Arrival Programs and Services for Migrants" in 1977. In general, the implementation of the Report's proposals has been of substantial benefit to migrants (both newly arrived and longer resident), to…

  13. 19 CFR 123.61 - Baggage arriving in baggage car.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 1 2014-04-01 2014-04-01 false Baggage arriving in baggage car. 123.61 Section... OF THE TREASURY CBP RELATIONS WITH CANADA AND MEXICO Baggage § 123.61 Baggage arriving in baggage car... cars....

  14. 19 CFR 123.61 - Baggage arriving in baggage car.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 1 2013-04-01 2013-04-01 false Baggage arriving in baggage car. 123.61 Section... OF THE TREASURY CBP RELATIONS WITH CANADA AND MEXICO Baggage § 123.61 Baggage arriving in baggage car... cars....

  15. 19 CFR 123.61 - Baggage arriving in baggage car.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 1 2012-04-01 2012-04-01 false Baggage arriving in baggage car. 123.61 Section... OF THE TREASURY CBP RELATIONS WITH CANADA AND MEXICO Baggage § 123.61 Baggage arriving in baggage car... cars....

  16. 19 CFR 122.154 - Notice of arrival.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... aircraft entering the U.S. from Cuba must give advance notice of arrival, unless it is an Office of Foreign Assets Control (OFAC) approved scheduled commercial aircraft of a scheduled airline. (b) Procedure for giving advance notice of arrival. The commander of an aircraft covered by this section shall give...

  17. 19 CFR 122.154 - Notice of arrival.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... aircraft entering the U.S. from Cuba must give advance notice of arrival, unless it is an Office of Foreign Assets Control (OFAC) approved scheduled commercial aircraft of a scheduled airline. (b) Procedure for giving advance notice of arrival. The commander of an aircraft covered by this section shall give...

  18. 19 CFR 122.154 - Notice of arrival.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... aircraft entering the U.S. from Cuba must give advance notice of arrival, unless it is an Office of Foreign Assets Control (OFAC) approved scheduled commercial aircraft of a scheduled airline. (b) Procedure for giving advance notice of arrival. The commander of an aircraft covered by this section shall give...

  19. 19 CFR 123.61 - Baggage arriving in baggage car.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Baggage arriving in baggage car. 123.61 Section 123.61 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY CUSTOMS RELATIONS WITH CANADA AND MEXICO Baggage § 123.61 Baggage arriving in baggage car. An inward foreign manifest on Customs...

  20. 7 CFR 322.7 - Notice of arrival.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ..., DEPARTMENT OF AGRICULTURE BEES, BEEKEEPING BYPRODUCTS, AND BEEKEEPING EQUIPMENT Importation of Adult Honeybees, Honeybee Germ Plasm, and Bees Other Than Honeybees From Approved Regions § 322.7 Notice of arrival. (a) At least 10 business days prior to the arrival in the United States of any shipment of...

  1. 7 CFR 322.7 - Notice of arrival.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ..., DEPARTMENT OF AGRICULTURE BEES, BEEKEEPING BYPRODUCTS, AND BEEKEEPING EQUIPMENT Importation of Adult Honeybees, Honeybee Germ Plasm, and Bees Other Than Honeybees From Approved Regions § 322.7 Notice of arrival. (a) At least 10 business days prior to the arrival in the United States of any shipment of...

  2. 7 CFR 322.7 - Notice of arrival.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ..., DEPARTMENT OF AGRICULTURE BEES, BEEKEEPING BYPRODUCTS, AND BEEKEEPING EQUIPMENT Importation of Adult Honeybees, Honeybee Germ Plasm, and Bees Other Than Honeybees From Approved Regions § 322.7 Notice of arrival. (a) At least 10 business days prior to the arrival in the United States of any shipment of...

  3. 7 CFR 322.7 - Notice of arrival.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ..., DEPARTMENT OF AGRICULTURE BEES, BEEKEEPING BYPRODUCTS, AND BEEKEEPING EQUIPMENT Importation of Adult Honeybees, Honeybee Germ Plasm, and Bees Other Than Honeybees From Approved Regions § 322.7 Notice of arrival. (a) At least 10 business days prior to the arrival in the United States of any shipment of...

  4. 7 CFR 322.7 - Notice of arrival.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ..., DEPARTMENT OF AGRICULTURE BEES, BEEKEEPING BYPRODUCTS, AND BEEKEEPING EQUIPMENT Importation of Adult Honeybees, Honeybee Germ Plasm, and Bees Other Than Honeybees From Approved Regions § 322.7 Notice of arrival. (a) At least 10 business days prior to the arrival in the United States of any shipment of...

  5. 19 CFR 123.61 - Baggage arriving in baggage car.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Baggage arriving in baggage car. 123.61 Section... OF THE TREASURY CBP RELATIONS WITH CANADA AND MEXICO Baggage § 123.61 Baggage arriving in baggage car... cars....

  6. 9 CFR 93.804 - Declaration upon arrival.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... FOR MEANS OF CONVEYANCE AND SHIPPING CONTAINERS Elephants, Hippopotami, Rhinoceroses, and Tapirs § 93.804 Declaration upon arrival. Upon arrival of an elephant, hippopotamus, rhinoceros, or tapir at a..., rhinoceros, or tapir was shipped; (h) The number, species, and purpose of importation of the...

  7. 9 CFR 93.804 - Declaration upon arrival.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... FOR MEANS OF CONVEYANCE AND SHIPPING CONTAINERS Elephants, Hippopotami, Rhinoceroses, and Tapirs § 93.804 Declaration upon arrival. Upon arrival of an elephant, hippopotamus, rhinoceros, or tapir at a..., rhinoceros, or tapir was shipped; (h) The number, species, and purpose of importation of the...

  8. 9 CFR 93.804 - Declaration upon arrival.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... FOR MEANS OF CONVEYANCE AND SHIPPING CONTAINERS Elephants, Hippopotami, Rhinoceroses, and Tapirs § 93.804 Declaration upon arrival. Upon arrival of an elephant, hippopotamus, rhinoceros, or tapir at a..., rhinoceros, or tapir was shipped; (h) The number, species, and purpose of importation of the...

  9. 9 CFR 93.804 - Declaration upon arrival.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... FOR MEANS OF CONVEYANCE AND SHIPPING CONTAINERS Elephants, Hippopotami, Rhinoceroses, and Tapirs § 93.804 Declaration upon arrival. Upon arrival of an elephant, hippopotamus, rhinoceros, or tapir at a..., rhinoceros, or tapir was shipped; (h) The number, species, and purpose of importation of the...

  10. 9 CFR 93.804 - Declaration upon arrival.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... FOR MEANS OF CONVEYANCE AND SHIPPING CONTAINERS Elephants, Hippopotami, Rhinoceroses, and Tapirs § 93.804 Declaration upon arrival. Upon arrival of an elephant, hippopotamus, rhinoceros, or tapir at a..., rhinoceros, or tapir was shipped; (h) The number, species, and purpose of importation of the...

  11. Divorce and asynchronous arrival in common terns, Sterna hirundo.

    PubMed

    GonzáLez-SolíS; Becker; Wendeln

    1999-11-01

    We investigated which of three hypotheses (better option, incompatibility or asynchronous arrival) best explains divorce in the common tern. One partner did not return the next year in 18.5% of 150 pairs. Among the 106 pairs in which both mates returned, the divorce rate was 18.9%. We found no significant differences in: breeding performance or condition in relation to the probability of divorce; quality of previous mates and new mates, mean age in relation to pair bond status; breeding success before and after divorce nor did this differ from breeding success of reunited pairs. Hence the better option and incompatibility hypotheses were not supported. However, divorce was more likely in pairs in which mates arrived asynchronously on the breeding grounds, supporting the asynchronous arrival hypothesis. Median arrival asynchrony for divorced pairs was 7.5 days and for reunited pairs 2 days; mates arriving more than 16 days apart always split up. About 20% of divorced birds lost breeding status in the year of divorce, probably as a consequence of their late arrival. Our results suggest that terns search for a new mate as soon as they arrive on the breeding grounds and that mates remain faithful to each other to avoid the costs of searching for a new partner. Thus, synchrony in arrival facilitates pair bond maintenance rather than asynchrony promoting divorce, since divorce appears to be a side-effect of asynchrony and not an active decision. Copyright 1999 The Association for the Study of Animal Behaviour. PMID:10564616

  12. TRACON Aircraft Arrival Planning and Optimization Through Spatial Constraint Satisfaction

    NASA Technical Reports Server (NTRS)

    Bergh, Christopher P.; Krzeczowski, Kenneth J.; Davis, Thomas J.; Denery, Dallas G. (Technical Monitor)

    1995-01-01

    A new aircraft arrival planning and optimization algorithm has been incorporated into the Final Approach Spacing Tool (FAST) in the Center-TRACON Automation System (CTAS) developed at NASA-Ames Research Center. FAST simulations have been conducted over three years involving full-proficiency, level five air traffic controllers from around the United States. From these simulations an algorithm, called Spatial Constraint Satisfaction, has been designed, coded, undergone testing, and soon will begin field evaluation at the Dallas-Fort Worth and Denver International airport facilities. The purpose of this new design is an attempt to show that the generation of efficient and conflict free aircraft arrival plans at the runway does not guarantee an operationally acceptable arrival plan upstream from the runway -information encompassing the entire arrival airspace must be used in order to create an acceptable aircraft arrival plan. This new design includes functions available previously but additionally includes necessary representations of controller preferences and workload, operationally required amounts of extra separation, and integrates aircraft conflict resolution. As a result, the Spatial Constraint Satisfaction algorithm produces an optimized aircraft arrival plan that is more acceptable in terms of arrival procedures and air traffic controller workload. This paper discusses the current Air Traffic Control arrival planning procedures, previous work in this field, the design of the Spatial Constraint Satisfaction algorithm, and the results of recent evaluations of the algorithm.

  13. 14 CFR 93.29 - International Arrival Authorizations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false International Arrival Authorizations. 93.29 Section 93.29 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION... at Chicago O'Hare International Airport § 93.29 International Arrival Authorizations. (a) Except...

  14. 14 CFR 93.29 - International Arrival Authorizations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false International Arrival Authorizations. 93.29 Section 93.29 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION... at Chicago O'Hare International Airport § 93.29 International Arrival Authorizations. (a) Except...

  15. 9 CFR 98.7 - Declaration upon arrival.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... CERTAIN ANIMAL EMBRYOS AND ANIMAL SEMEN Ruminant and Swine Embryos from Regions Free of Rinderpest and Foot-and-Mouth Disease; and Embryos of Horses and Asses § 98.7 Declaration upon arrival. Upon arrival of an embryo at a port of entry, the importer or the importer's agent shall notify APHIS of...

  16. 9 CFR 98.7 - Declaration upon arrival.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... CERTAIN ANIMAL EMBRYOS AND ANIMAL SEMEN Ruminant and Swine Embryos from Regions Free of Rinderpest and Foot-and-Mouth Disease; and Embryos of Horses and Asses § 98.7 Declaration upon arrival. Upon arrival of an embryo at a port of entry, the importer or the importer's agent shall notify APHIS of...

  17. 9 CFR 98.7 - Declaration upon arrival.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... CERTAIN ANIMAL EMBRYOS AND ANIMAL SEMEN Ruminant and Swine Embryos from Regions Free of Rinderpest and Foot-and-Mouth Disease; and Embryos of Horses and Asses § 98.7 Declaration upon arrival. Upon arrival of an embryo at a port of entry, the importer or the importer's agent shall notify APHIS of...

  18. 9 CFR 98.7 - Declaration upon arrival.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... CERTAIN ANIMAL EMBRYOS AND ANIMAL SEMEN Ruminant and Swine Embryos from Regions Free of Rinderpest and Foot-and-Mouth Disease; and Embryos of Horses and Asses § 98.7 Declaration upon arrival. Upon arrival of an embryo at a port of entry, the importer or the importer's agent shall notify APHIS of...

  19. 9 CFR 98.7 - Declaration upon arrival.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... CERTAIN ANIMAL EMBRYOS AND ANIMAL SEMEN Ruminant and Swine Embryos from Regions Free of Rinderpest and Foot-and-Mouth Disease; and Embryos of Horses and Asses § 98.7 Declaration upon arrival. Upon arrival of an embryo at a port of entry, the importer or the importer's agent shall notify APHIS of...

  20. 7 CFR 319.8-4 - Notice of arrival.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ..., DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Foreign Cotton and Covers Conditions of Importation and Entry of Cotton and Covers § 319.8-4 Notice of arrival. Immediately upon arrival at a port of entry of any shipment of cotton or covers the importer shall submit in duplicate, through the United...

  1. Seed arrival in tropical forest tree fall gaps.

    PubMed

    Puerta-Pińero, Carolina; Muller-Landau, Helene C; Calderón, Osvaldo; Wright, S Joseph

    2013-07-01

    Tree deaths open gaps in closed-canopy forests, which allow light to reach the forest floor and promote seed germination and seedling establishment. Gap dependence of regeneration is an important axis of life history variation among forest plant species, and many studies have evaluated how plant species differ in seedling and sapling performance in gaps. However, relatively little is known about how seed arrival in gaps compares with seed arrival in the understory, even though seed dispersal by wind and animals is expected to be altered in gaps. We documented seed arrival for the first seven years after gap formation in the moist tropical forests of Barro Colorado Island (BCI), Panama, and evaluated how the amount and functional composition of arriving seeds compared with understory sites. On average, in the first three years after gap formation, 72% fewer seeds arrived in gaps than in the understory (207 vs. 740 seeds x m(-2) x yr(-1)). The reduction in number of arriving seeds fell disproportionately on animal-dispersed species, which suffered an 86% reduction in total seed number, while wind-dispersed species experienced only a 47% reduction, and explosively dispersed species showed increased seed numbers arriving. The increase in explosively dispersed seeds consisted entirely of the seeds of several shrub species, a result consistent with greater in situ seed production by explosively dispersed shrubs that survived gap formation or recruited immediately thereafter. Lianas did relatively better in seed arrival into gaps than did trees, suffering less of a reduction in seed arrival compared with understory sites. This result could in large part be explained by the greater predominance of wind dispersal among lianas: there were no significant differences between lianas and trees when controlling for dispersal syndromes. Our results show that seed arrival in gaps is very different from seed arrival in the understory in both total seeds arriving and functional

  2. Scheduling and Separating Departures Crossing Arrival Flows in Shared Airspace

    NASA Technical Reports Server (NTRS)

    Chevalley, Eric; Parke, Bonny K.; Lee, Paul; Omar, Faisal; Lee, Hwasoo; Beinert, Nancy; Kraut, Joshua M.; Palmer, Everett

    2013-01-01

    Flight efficiency and reduction of flight delays are among the primary goals of NextGen. In this paper, we propose a concept of shared airspace where departures fly across arrival flows, provided gaps are available in these flows. We have explored solutions to separate departures temporally from arrival traffic and pre-arranged procedures to support controllers' decisions. We conducted a Human-in-the-Loop simulation and assessed the efficiency and safety of 96 departures from the San Jose airport (SJC) climbing across the arrival airspace of the Oakland and San Francisco arrival flows. In our simulation, the SJC tower had a tool to schedule departures to fly across predicted gaps in the arrival flow. When departures were mistimed and separation could not be ensured, a safe but less efficient route was provided to the departures to fly under the arrival flows. A coordination using a point-out procedure allowed the arrival controller to control the SJC departures right after takeoff. We manipulated the accuracy of departure time (accurate vs. inaccurate) as well as which sector took control of the departures after takeoff (departure vs. arrival sector) in a 2x2 full factorial plan. Results show that coordination time decreased and climb efficiency increased when the arrival sector controlled the aircraft right after takeoff. Also, climb efficiency increased when the departure times were more accurate. Coordination was shown to be a critical component of tactical operations in shared airspace. Although workload, coordination, and safety were judged by controllers as acceptable in the simulation, it appears that in the field, controllers would need improved tools and coordination procedures to support this procedure.

  3. Flame Arrival Measurement By Instrumented Spark Plug or Head Gasket

    1995-04-10

    PLUGBIN was developed to support Sandia technologies involving instrumented head gaskets and spark plugs for engine research and development. It acquires and processes measurements of flame arrival and pressure from a spark ignition. Flame arrival is determined from analog ionization-probe or visible-emission signals, and/or digitial signals from a dedicated flame arrival measurement processor. The pressure measurements are analyzed to determine the time of peak pressure and the time to burn 10 and 90 percent ofmore » the charge. Histograms are then calculated and displayed for each measurement.« less

  4. Concept of Operations for Interval Management Arrivals and Approach

    NASA Technical Reports Server (NTRS)

    Hicok, Daniel S.; Barmore, Bryan E.

    2016-01-01

    This paper presents the concept of operations for interval management operations to be deployed in the US National Airspace System (NAS) by the Federal Aviation Administration (FAA) after 2020. The use of interval management operations is described that begin in en route airspace and continue to a termination point inside the arrival terminal area, in a terminal environment that includes other arrival management tools such as arrival metering, Ground-based Interval Management - Spacing (GIM-S), and Terminal Sequencing and Spacing (TSAS). The roles of Air Traffic Controllers and Flight Crews and the ground automation tools that are used by Air Traffic Controllers to enable the primary operation and variations are described.

  5. Collaborative Arrival Planning: Data Sharing and User Preference Tools

    NASA Technical Reports Server (NTRS)

    Zelenka, Richard E.; Edwards, Thomas A. (Technical Monitor)

    1998-01-01

    Air traffic growth and air carrier economic pressures have motivated efforts to increase the flexibility of the air traffic management process and change the relationship between the air traffic control service provider and the system user. One of the most visible of these efforts is the U.S. government/industry "free flight" initiative, in which the service provider concentrates on safety and cross-airline fairness, and the user on their business objectives and operating preferences, including selecting their own path and speed in real-time. In the terminal arrival phase of flight, severe restrictions and rigid control are currently placed on system users, typically without regard for individual user operational preferences. Airborne delays applied to arriving aircraft into capacity constrained airports are imposed on a first-come, first-serve basis, and thus do not allow the system user to plan for or prioritize late arrivals, or to economically optimize their arrival sequence. A central tenant of the free-flight operating paradigm is collaboration between service providers and users in reaching air traffic management decisions. Such collaboration would be particularly beneficial to an airline's "hub" operation, where off-schedule arrival aircraft are a consistent problem, as they cause serious air-port ramp difficulties, rippling airline scheduling effects, and result in large economic inefficiencies. Greater collaboration can also lead to increased airport capacity and decrease the severity of over-capacity rush periods. In the NASA Collaborative Arrival Planning (CAP) project, both independent exchange of real-time data between the service provider and system user and collaborative decision support tools are addressed. Data exchange of real-time arrival scheduling, airspace management, and air carrier fleet data between the FAA service provider and an air carrier is being conducted and evaluated. Collaborative arrival decision support tools to allow intra

  6. Queues with Dropping Functions and General Arrival Processes.

    PubMed

    Chydzinski, Andrzej; Mrozowski, Pawel

    2016-01-01

    In a queueing system with the dropping function the arriving customer can be denied service (dropped) with the probability that is a function of the queue length at the time of arrival of this customer. The potential applicability of such mechanism is very wide due to the fact that by choosing the shape of this function one can easily manipulate several performance characteristics of the queueing system. In this paper we carry out analysis of the queueing system with the dropping function and a very general model of arrival process--the model which includes batch arrivals and the interarrival time autocorrelation, and allows for fitting the actual shape of the interarrival time distribution and its moments. For such a system we obtain formulas for the distribution of the queue length and the overall customer loss ratio. The analytical results are accompanied with numerical examples computed for several dropping functions. PMID:26943171

  7. President Obama and Family Arrive at Kennedy Space Center

    NASA Video Gallery

    President Obama, accompanied by First Lady Michelle Obama and their two daughters, arrive aboard Air Force One at the Cape Canaveral AFS near NASA’s Kennedy Space Center at approximately 2 p.m. E...

  8. NASA's SOFIA Arrives in Christchurch, New Zealand, July 14, 2013

    NASA Video Gallery

    NASA's Stratospheric Observatory for Infrared Astronomy airborne observatory arrived at Christchurch International Airport, New Zealand, July 14 at 12:14 p.m. (New Zealand Standard Time) to investi...

  9. STS-85 Commander Curtis Brown arrives at SLF for TCDT

    NASA Technical Reports Server (NTRS)

    1997-01-01

    STS-85 Commander Curtis L. Brown, Jr., arrives at the Shuttle Landing Facility for his mission's Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. The liftoff of STS-85 is targeted for August 7, 1997.

  10. Astronauts Armstrong and Scott arrive at Hickam Field, Hawaii

    NASA Technical Reports Server (NTRS)

    1966-01-01

    Astronauts Neil A. Armstrong (center), command pilot, and David R. Scott, pilot, arrive at Hickam Field, Hawaii on their way from Naha, Okinawa, to Cape Kennedy, Florida. Astronaut Walter M. Schirra Jr. is at extreme left.

  11. Concept of Operations for Interval Management Arrivals and Approach

    NASA Technical Reports Server (NTRS)

    Hicok, Daniel S.; Barmore, Bryan E.

    2016-01-01

    This paper presents the concept of operations for interval management operations to be deployed in the US National Airspace System (NAS) by the Federal Aviation Administration (FAA) Interval Management Program. The arrivals and approach operations are explored in detail including the primary operation and variations. The use of interval management operations is described that begin in en route airspace and continue to a termination point inside the arrival terminal area in the highly automated terminal environment that includes other arrival management tools such as arrival metering, Ground-based Interval Management - Spacing (GIM-S), and Terminal Sequencing and Spacing (TSAS). The roles of Air Traffic and Pilots and the ground automation tools that are used by Air Traffic Controllers to enable the operations are explored.

  12. Webb Telescope Backplane Arrives at NASA Goddard Space Flight Center

    NASA Video Gallery

    Webb Telescope's Backplane arrived at Joint Base Andrews on Monday, August 24, 2015 aboard a U.S. Air Force C-5 cargo plane. The Backplane, inside the Space Telescope Transporter for Air Road and S...

  13. STS-85 Pilot Kent Rominger arrives at SLF for TCDT

    NASA Technical Reports Server (NTRS)

    1997-01-01

    STS-85 Pilot Kent V. Rominger arrives at the Shuttle Landing Facility for his mission's Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. The liftoff of STS-85 is targeted for August 7, 1997.

  14. Queues with Dropping Functions and General Arrival Processes

    PubMed Central

    Chydzinski, Andrzej; Mrozowski, Pawel

    2016-01-01

    In a queueing system with the dropping function the arriving customer can be denied service (dropped) with the probability that is a function of the queue length at the time of arrival of this customer. The potential applicability of such mechanism is very wide due to the fact that by choosing the shape of this function one can easily manipulate several performance characteristics of the queueing system. In this paper we carry out analysis of the queueing system with the dropping function and a very general model of arrival process—the model which includes batch arrivals and the interarrival time autocorrelation, and allows for fitting the actual shape of the interarrival time distribution and its moments. For such a system we obtain formulas for the distribution of the queue length and the overall customer loss ratio. The analytical results are accompanied with numerical examples computed for several dropping functions. PMID:26943171

  15. Countdown to Exploration Flight Test 1: The Arrival

    NASA Video Gallery

    As NASA counts down to the Exploration Flight Test 1 (EFT-1) of Orion in 2014, the spacecraft that will fly that mission has arrived at the launch site in Florida. Take a look inside the Operations...

  16. JPL pulsar timing observations. II - Geocentric arrival times

    NASA Technical Reports Server (NTRS)

    Downs, G. S.; Reichley, P. E.

    1983-01-01

    Monitoring of the behavior of naturally pulsating galactic radio sources, or pulsars, through regularly spaced measurements of pulse arrival times, has been conducted by several laboratories. A tabular presentation is here made of pulse arrival time measurements from the NASA Deep Space Network between late 1968 and early 1981. By expressing the measurements in ephemeris time, and referring them to the geocenter, usable tables of results have been generated for each pulsar listed in the first of the tables given. The considerations addressed by the tables are: (1) a necessary step in the study of pulsar dynamics is the reduction of topocentric arrival times to the barycenter of the solar system; (2) the tabulated data are accessible to all opinions as to the procedures to be used in interpreting arrival time data; and (3) different observing programs can usually be combined to produce an improvement in the total data set.

  17. 34. photographer unknown September 1937 ROOSEVELT ARRIVING FOR DEDICATION OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    34. photographer unknown September 1937 ROOSEVELT ARRIVING FOR DEDICATION OF BONNEVILLE DAM. - Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off Interstate 84, Bonneville, Multnomah County, OR

  18. Minimizing makespan on parallel machines with batch arrivals

    NASA Astrophysics Data System (ADS)

    Chung, Tsui-Ping; Liao, Ching-Jong; Lin, Chien-Hung

    2012-04-01

    Most studies in the scheduling literature assume that jobs arrive at time zero, while some studies assume that jobs arrive individually at non-zero times. However, both assumptions may not be valid in practice because jobs usually arrive in batches. In this article, a scheduling model for an identical parallel machine problem with batch arrivals is formulated. Because of the NP-hardness of the problem, a heuristic based on a simplified version of lexicographical search is proposed. To verify the heuristic, two lower bounding schemes are developed, where one lower bound is tight, and the list scheduling heuristic is compared. Extensive computational experiments demonstrate that the proposed heuristic is quite efficient in obtaining near optimal solution with an average error of less than 1.58%. The percentage improvement (from the lower bound) of the heuristic solution on the solution by the list scheduling is as large as 31.68.

  19. STS-90 Payload Specialist James Pawelczyk arrives at KSC

    NASA Technical Reports Server (NTRS)

    1998-01-01

    STS-90 Payload Specialist James Pawelczyk, Ph.D., tosses mission hats to his two children shortly after arrival at Kennedy Space Center's Shuttle Landing Facility. The crew of STS-90 arrived at KSC in preparation for their mission, scheduled for launch from KSC's Launch Pad 39B on April 16 at 2:19 p.m. EDT. The flight of Neurolab is scheduled to last nearly 17 days.

  20. Estimating Controller Intervention Probabilities for Optimized Profile Descent Arrivals

    NASA Technical Reports Server (NTRS)

    Meyn, Larry A.; Erzberger, Heinz; Huynh, Phu V.

    2011-01-01

    Simulations of arrival traffic at Dallas/Fort-Worth and Denver airports were conducted to evaluate incorporating scheduling and separation constraints into advisories that define continuous descent approaches. The goal was to reduce the number of controller interventions required to ensure flights maintain minimum separation distances of 5 nmi horizontally and 1000 ft vertically. It was shown that simply incorporating arrival meter fix crossing-time constraints into the advisory generation could eliminate over half of the all predicted separation violations and more than 80% of the predicted violations between two arrival flights. Predicted separation violations between arrivals and non-arrivals were 32% of all predicted separation violations at Denver and 41% at Dallas/Fort-Worth. A probabilistic analysis of meter fix crossing-time errors is included which shows that some controller interventions will still be required even when the predicted crossing-times of the advisories are set to add a 1 or 2 nmi buffer above the minimum in-trail separation of 5 nmi. The 2 nmi buffer was shown to increase average flight delays by up to 30 sec when compared to the 1 nmi buffer, but it only resulted in a maximum decrease in average arrival throughput of one flight per hour.

  1. The vertical structure of shadow-zone arrivals at long range in the ocean.

    PubMed

    Van Uffelen, Lora J; Worcester, Peter F; Dzieciuch, Matthew A; Rudnick, Daniel L

    2009-06-01

    Multimegameter-range acoustic data obtained by bottom-mounted receivers show significant acoustic energy penetrating several hundred meters into geometric shadow zones below cusps (caustics) of timefronts computed using climatological databases [B. D. Dushaw et al., IEEE J. Ocean. Eng. 24, 202-214 (1999)]. This penetration is much larger than predicted by diffraction theory. Because these receivers are horizontal arrays, they do not provide information on the vertical structure of the shadow-zone arrivals. Acoustic data from two vertical line array receivers deployed in close proximity in the North Pacific Ocean, together virtually spanning the water column, show the vertical structure of the shadow-zone arrivals for transmissions from broadband 250-Hz sources moored at the sound-channel axis (750 m) and slightly above the surface conjugate depth (3000 m) at ranges of 500 and 1000 km. Comparisons to parabolic equation simulations for sound-speed fields that do not include significant internal-wave variability show that early branches of the measured timefronts consistently penetrate as much as 500-800 m deeper into the water column than predicted. Subsequent parabolic equation simulations incorporating sound-speed fluctuations consistent with the Garrett-Munk internal-wave spectrum at full strength accurately predict the observed energy level to within 3-4-dB rms over the depth range of the shadow-zone arrivals. PMID:19507939

  2. Three-dimensional numerical modeling of bottom-diffracted surface-reflected arrivals in the North Pacific

    NASA Astrophysics Data System (ADS)

    Stephen, R. A.; Udovydchenkov, I. A.; Bolmer, T.; Komatitsch, D.; Tromp, J.; Casarotti, E.; Xie, Z.; Worcester, P. F.

    2015-12-01

    Bottom-diffracted surface-reflected (BDSR) arrivals were first identified in the 2004 Long-range Ocean Acoustic Propagation Experiment (Stephen et al, 2013, JASA, v.134, p.3307-3317). The BDSR mechanism provides a means for acoustic signals and noise from distant sources to appear with significant strength on the deep seafloor. At depths greater than the conjugate depth ambient noise and PE- predicted arrivals are sufficiently quiet that BDSR paths, scattered from small seamounts, can be the largest amplitude arrivals observed. The Ocean Bottom Seismometer Augmentation in the North Pacific (OBSANP) Experiment in June-July 2013 was designed to further define the characteristics of the BDSRs and to understand the conditions under which BDSRs are excited and propagate. An example of BDSR arrivals is shown on the record section in the figure. Other arrivals are the direct water wave and first and second multiples. The reciprocal of the BDSR mechanism also plays a role in T-phase excitation. To further understand the BDSR mechanism, the SPECFEM3D code was extended to handle high-frequency, deep water bottom scattering problems with actual bathymetry and a typical sound speed profile in the water column. The model size is 38km x 27km x 6.5km. The source is centered at 10Hz with a 5Hz bandwidth. Work supported by NSF and ONR.

  3. Transcatheter Closure of Atrial Septal Defects using the GORE(®) Septal Occluder in Children Less Than 10 kg of Body Weight.

    PubMed

    Abu-Tair, Tariq; Wiethoff, Christiane M; Kehr, Jascha; Kuroczynski, Wlodzimierz; Kampmann, Christoph

    2016-04-01

    The GORE(®) Septal Occluder (GSO) is a well-evaluated device for interventional ASD closure with closure rates comparable to the Amplatzer(®) Septal Occluder (ASO), but there are no published reports of its use in small children weighing less than 10 kg. This may be due to the necessity of a large-sized introducing sheath of at least 10 Fr and therefore the assumed risk of complications in vascular access. The GSO is an alternative option for interventional ASD closure in children weighing less than 10 kg. Fourteen infants and children with a median body weight 8900 g (range 6350-9650 g) underwent successful ASD closure using the GSO. The closure was performed under fluoroscopic and transthoracic echocardiographic guidance. Postprocedure, the vessels passed by the occluder and delivery catheter were examined by duplex sonography. The median ASD diameter was 11 mm (5-17 mm), and the median GSO size was 22.5 mm (15-30 mm), whereas the median ASO left disc size that would have been recommended was 25 mm (17-31 mm). All ASDs were successfully closed. During a median follow-up of 1.57 years (range 0.5-4.2), no complications like erosion, embolization, arrhythmias, or vascular injuries occurred. Although using a 10-Fr introducer sheath, no vascular complications were detected. Our data suggest that the small usable size as well as the soft and flexible design of the device allows successful use of the GSO in young children. PMID:26895499

  4. Design Considerations for a New Terminal Area Arrival Scheduler

    NASA Technical Reports Server (NTRS)

    Thipphavong, Jane; Mulfinger, Daniel

    2010-01-01

    Design of a terminal area arrival scheduler depends on the interrelationship between throughput, delay and controller intervention. The main contribution of this paper is an analysis of the above interdependence for several stochastic behaviors of expected system performance distributions in the aircraft s time of arrival at the meter fix and runway. Results of this analysis serve to guide the scheduler design choices for key control variables. Two types of variables are analyzed, separation buffers and terminal delay margins. The choice for these decision variables was tested using sensitivity analysis. Analysis suggests that it is best to set the separation buffer at the meter fix to its minimum and adjust the runway buffer to attain the desired system performance. Delay margin was found to have the least effect. These results help characterize the variables most influential in the scheduling operations of terminal area arrivals.

  5. Prediction of the shock arrival time with SEP observations

    NASA Astrophysics Data System (ADS)

    Qin, G.; Zhang, M.; Rassoul, H. K.

    2009-09-01

    Real-time prediction of the arrival times at Earth of shocks is very important for space weather research. Recently, various models for shock propagation are used to forecast the shock arriving times (SATs) with information of initial coronal shock and flare from near real-time radio and X-ray data. In this paper, we add the use of solar energetic particles (SEP) observation to improve the shock arrival time (SAT) prediction. High-energy SEPs originating from flares move to the Earth much faster than the shocks related to the same flares. We develop an SAT prediction model by combining a well-known shock propagation model, STOA, and the analysis of SEPs detected at Earth. We demonstrate that the SAT predictions are improved by the new model with the help of 38-53 keV electron SEP observations. In particular, the correct prediction to false alarm ratio is improved significantly.

  6. Ten Years of Experience with the GORE EXCLUDER{sup Registered-Sign} Stent-Graft for the Treatment of Aortic and Iliac Aneurysms: Outcomes from a Single Center Study

    SciTech Connect

    Maleux, G. Claes, H.; Van Holsbeeck, A.; Janssen, R.; Laenen, A.; Heye, S.; Houthoofd, S.; Fourneau, I.

    2012-06-15

    Purpose: This study was designed to assess the long-term outcome of selected patients with aortic, aortoiliac, and isolated common iliac aneurysms treated with the GORE EXCLUDER{sup Registered-Sign} stent-graft. Methods: Between December 1998 and June 2010, 121 nonconsecutive patients underwent insertion of a GORE EXCLUDER{sup Registered-Sign} stent-graft to treat an aortic (n = 80; 66%), aortoiliac (n = 25; 21%), or isolated common iliac (n = 16; 13%) aneurysm. Procedural and follow-up data were collected prospectively. Primary endpoints are overall survival, intervention-free survival, and freedom from aneurysm rupture. Secondary endpoints are device- and procedure-related complications, including all types of endoleaks or endotension, and reintervention. Results: The mean follow-up is 4.98 years (standard deviation, 3.18; median follow-up, 4.05 years). The estimated percentage overall survival (with 95% confidence interval) after respectively 5 and 10 years of follow-up is 74.5% (65.8; 81.3) and 57.8% (47.7; 66.7). The estimated intervention-free survival after respectively 5 and 10 years is 90% (84.3; 96.1) and 77.7% (67; 88.4). There was no aneurysm rupture during follow-up. Early postoperative complications occurred in 16 patients (13%); none were fatal. Late reinterventions were performed in 18 patients (15%). Finally, throughout the follow-up period, endoleaks were identified: type I (n = 4; 3%); type II (n = 39; 32%); type III (n = 0; 0%); endotension was seen in 11 patients (9%). Conclusions: Aneurysm exclusion with use of the GORE EXCLUDER{sup Registered-Sign} stent-graft is durable through a mean follow-up of nearly 5 years. There was no postprocedural aneurysm rupture. Complications occurred throughout the follow-up period, requiring continued clinical and radiological surveillance.

  7. Anchorage Arrival Scheduling Under Off-Nominal Weather Conditions

    NASA Technical Reports Server (NTRS)

    Grabbe, Shon; Chan, William N.; Mukherjee, Avijit

    2012-01-01

    Weather can cause flight diversions, passenger delays, additional fuel consumption and schedule disruptions at any high volume airport. The impacts are particularly acute at the Ted Stevens Anchorage International Airport in Anchorage, Alaska due to its importance as a major international portal. To minimize the impacts due to weather, a multi-stage scheduling process is employed that is iteratively executed, as updated aircraft demand and/or airport capacity data become available. The strategic scheduling algorithm assigns speed adjustments for flights that originate outside of Anchorage Center to achieve the proper demand and capacity balance. Similarly, an internal departure-scheduling algorithm assigns ground holds for pre-departure flights that originate from within Anchorage Center. Tactical flight controls in the form of airborne holding are employed to reactively account for system uncertainties. Real-world scenarios that were derived from the January 16, 2012 Anchorage visibility observations and the January 12, 2012 Anchorage arrival schedule were used to test the initial implementation of the scheduling algorithm in fast-time simulation experiments. Although over 90% of the flights in the scenarios arrived at Anchorage without requiring any delay, pre-departure scheduling was the dominant form of control for Anchorage arrivals. Additionally, tactical scheduling was used extensively in conjunction with the pre-departure scheduling to reactively compensate for uncertainties in the arrival demand. For long-haul flights, the strategic scheduling algorithm performed best when the scheduling horizon was greater than 1,000 nmi. With these long scheduling horizons, it was possible to absorb between ten and 12 minutes of delay through speed control alone. Unfortunately, the use of tactical scheduling, which resulted in airborne holding, was found to increase as the strategic scheduling horizon increased because of the additional uncertainty in the arrival times

  8. STS-86 Mission Specialist Wolf arrives at SLF before launch

    NASA Technical Reports Server (NTRS)

    1997-01-01

    STS-86 Mission Specialist David A. Wolf, the next U.S. astronaut slated to live and work on the Russian Space Station Mir, is all smiles after his arrival at KSCs Shuttle Landing Facility on Monday. Wolf is making his second spaceflight on STS-86, scheduled to be the seventh docking of the Shuttle with the Mir. After the docking, Wolf will transfer to the Mir for an approximate four-month stay. He replaces U.S. astronaut C. Michael Foale, who arrived at Mir in May and will return to Earth with the remainder of the STS-86 crew.

  9. A new pulse arrival-time recording system

    SciTech Connect

    Arnone, G.J.

    1996-12-31

    We describe a new pulse arrival-time recording system that is being developed at Los Alamos. The new PATRM/PCI (Pulse Arrival-Time Recording Module/Peripheral Component Interconnect) has had several features added. These features enhance our time-correlation measurement capabilities. By applying the latest advances in electronics and computer technology we are able to increase capability over existing instrumentation while lowering the per channel cost. The modular design approach taken allows easy configuration of both small and large systems.

  10. GORE Flow Reversal System and GORE Embolic Filter Extension Study

    ClinicalTrials.gov

    2016-01-22

    Carotid Stenosis; Constriction, Pathologic; Carotid Artery Diseases; Cerebrovascular Disorders; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Arterial Occlusive Diseases; Vascular Diseases; Cardiovascular Diseases; Pathological Conditions, Anatomical

  11. Gemini 12 crew arrives aboard U.S.S. Wasp

    NASA Technical Reports Server (NTRS)

    1966-01-01

    A happy Gemini 12 prime crew arrives aboard the aircraft carrier, U.S.S. Wasp. Astronauts James A. Lovell Jr. (left), command pilot, and Edwin E. Aldrin Jr., pilot, had just been picked up from the splashdown area by helicopter.

  12. 27 CFR 26.128 - Taxpayment at port of arrival.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... BUREAU, DEPARTMENT OF THE TREASURY LIQUORS LIQUORS AND ARTICLES FROM PUERTO RICO AND THE VIRGIN ISLANDS Liquors and Articles Purchased by Tourists in Puerto Rico § 26.128 Taxpayment at port of arrival. If the... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false Taxpayment at port...

  13. 7 CFR 322.31 - Notice of arrival.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 5 2013-01-01 2013-01-01 false Notice of arrival. 322.31 Section 322.31 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE BEES, BEEKEEPING BYPRODUCTS, AND BEEKEEPING EQUIPMENT Importation and Transit of Restricted Articles § 322.31 Notice...

  14. TRAM HOUSE INTERIOR, LOOKING WEST. NOTE ARRIVING BUCKET ON RAIL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    TRAM HOUSE INTERIOR, LOOKING WEST. NOTE ARRIVING BUCKET ON RAIL IN CENTER, DEPARTING BUCKET IN LEFT BACKGROUND, TRACTION CABLE IN PULLEYS, AND SUSPENSION CABLE ANGLING DOWN THROUGH FLOOR. - Shenandoah-Dives Mill, 135 County Road 2, Silverton, San Juan County, CO

  15. A geometrical result regarding time-of-arrival lightning location

    NASA Technical Reports Server (NTRS)

    Solakiewicz, Richard

    1996-01-01

    One reason for investigating Lightning Detection And Ranging (LDAR) is to validate data from the Optical Transient Detector (OTD). A Time-Of-Arrival (TOA) procedure may be used with radio wave portions of lighting signatures. An antenna is in place at KSC.

  16. 7 CFR 319.37-11 - Arrival notification.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 5 2011-01-01 2011-01-01 false Arrival notification. 319.37-11 Section 319.37-11 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Nursery Stock, Plants, Roots, Bulbs,...

  17. ELECTRICAL LINES ARRIVE FROM CENTRAL FACILITIES AREA, SOUTH OF MTR. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    ELECTRICAL LINES ARRIVE FROM CENTRAL FACILITIES AREA, SOUTH OF MTR. EXCAVATION RUBBLE IN FOREGROUND. CONTRACTOR CRAFT SHOPS, CRANES, AND OTHER MATERIALS ON SITE. CAMERA FACES EAST, WITH LITTLE BUTTE AND MIDDLE BUTTE IN DISTANCE. INL NEGATIVE NO. 335. Unknown Photographer, 7/1/1950 - Idaho National Engineering Laboratory, Test Reactor Area, Materials & Engineering Test Reactors, Scoville, Butte County, ID

  18. A Comparison of CTAS and Airline Time of Arrival Predictions

    NASA Technical Reports Server (NTRS)

    Heere, Karen R.; Zelenka, Richard E.; Hsu, Rose Y.

    1999-01-01

    A statistically-based comparison of aircraft times of arrival between Center/TRACON Automation System (CTAS) air traffic control scheduling and airline predictions is presented. CTAS is found to provide much improved values, forming the foundation for airline operational improvements, as observed during an airline field trial of a CTAS display.

  19. Self-Regulation in Newly Arrived International Adoptees

    ERIC Educational Resources Information Center

    Tirella, Linda Grey; Miller, Laurie C.

    2011-01-01

    Many newly arrived international adoptees (IA) have difficulties with eating, sleeping, and self-soothing/self-stimulating (SS) behaviors. However, to date the prevalence of these problems and associated risk factors have not been clearly identified. Therefore, we proposed to evaluate 387 IA for the presence of these self-regulation and behavioral…

  20. 7 CFR 319.37-11 - Arrival notification.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 5 2010-01-01 2010-01-01 false Arrival notification. 319.37-11 Section 319.37-11 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Nursery Stock, Plants, Roots, Bulbs,...

  1. "Reading between the Pictures": Immigrant Students' Interpretations of "The Arrival"

    ERIC Educational Resources Information Center

    Martinez-Roldan, Carmen M.; Newcomer, Sarah

    2011-01-01

    In this article, the authors share findings from a study in which immigrant students responded to the wordless text "The Arrival" in small-group, bilingual literature discussions. The interpretive processes of two of the children with different ethnic backgrounds, levels of English proficiency, and styles of response are highlighted as exemplary…

  2. Simulation Results for Airborne Precision Spacing along Continuous Descent Arrivals

    NASA Technical Reports Server (NTRS)

    Barmore, Bryan E.; Abbott, Terence S.; Capron, William R.; Baxley, Brian T.

    2008-01-01

    This paper describes the results of a fast-time simulation experiment and a high-fidelity simulator validation with merging streams of aircraft flying Continuous Descent Arrivals through generic airspace to a runway at Dallas-Ft Worth. Aircraft made small speed adjustments based on an airborne-based spacing algorithm, so as to arrive at the threshold exactly at the assigned time interval behind their Traffic-To-Follow. The 40 aircraft were initialized at different altitudes and speeds on one of four different routes, and then merged at different points and altitudes while flying Continuous Descent Arrivals. This merging and spacing using flight deck equipment and procedures to augment or implement Air Traffic Management directives is called Flight Deck-based Merging and Spacing, an important subset of a larger Airborne Precision Spacing functionality. This research indicates that Flight Deck-based Merging and Spacing initiated while at cruise altitude and well prior to the Terminal Radar Approach Control entry can significantly contribute to the delivery of aircraft at a specified interval to the runway threshold with a high degree of accuracy and at a reduced pilot workload. Furthermore, previously documented work has shown that using a Continuous Descent Arrival instead of a traditional step-down descent can save fuel, reduce noise, and reduce emissions. Research into Flight Deck-based Merging and Spacing is a cooperative effort between government and industry partners.

  3. Estimating Radar Velocity using Direction of Arrival Measurements

    SciTech Connect

    Doerry, Armin Walter; Horndt, Volker; Bickel, Douglas Lloyd; Naething, Richard M.

    2014-09-01

    Direction of Arrival (DOA) measurements, as with a monopulse antenna, can be compared against Doppler measurements in a Synthetic Aperture Radar ( SAR ) image to determine an aircraft's forward velocity as well as its crab angle, to assist the aircraft's navigation as well as improving high - performance SAR image formation and spatial calibration.

  4. STS-87 Crew arrives at KSC for TCDT

    NASA Technical Reports Server (NTRS)

    1997-01-01

    In preparation for Space Shuttle Mission STS-87, the crew arrives at the Kennedy Space Center Shuttle Landing Facility to participate in the Terminal Countdown Demonstration Test (TCDT) for their mission. The TCDT is a dress rehearsal for launch. STS- 87 will be the fourth flight of the United States Microgravity Payload and the Spartan-201 deployable satellite. Launch is targeted for Nov. 19.

  5. 8 CFR 251.5 - Paper arrival and departure manifests for crew.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 8 Aliens and Nationality 1 2014-01-01 2014-01-01 false Paper arrival and departure manifests for... REGULATIONS ARRIVAL AND DEPARTURE MANIFESTS AND LISTS: SUPPORTING DOCUMENTS § 251.5 Paper arrival and... authorized agent, owner, or consignee, of a commercial vessel or commercial aircraft arriving in or...

  6. 8 CFR 251.5 - Paper arrival and departure manifests for crew.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 8 Aliens and Nationality 1 2010-01-01 2010-01-01 false Paper arrival and departure manifests for... REGULATIONS ARRIVAL AND DEPARTURE MANIFESTS AND LISTS: SUPPORTING DOCUMENTS § 251.5 Paper arrival and... authorized agent, owner, or consignee, of a commercial vessel or commercial aircraft arriving in or...

  7. 8 CFR 251.5 - Paper arrival and departure manifests for crew.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 8 Aliens and Nationality 1 2011-01-01 2011-01-01 false Paper arrival and departure manifests for... REGULATIONS ARRIVAL AND DEPARTURE MANIFESTS AND LISTS: SUPPORTING DOCUMENTS § 251.5 Paper arrival and... authorized agent, owner, or consignee, of a commercial vessel or commercial aircraft arriving in or...

  8. 8 CFR 251.5 - Paper arrival and departure manifests for crew.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 8 Aliens and Nationality 1 2013-01-01 2013-01-01 false Paper arrival and departure manifests for... REGULATIONS ARRIVAL AND DEPARTURE MANIFESTS AND LISTS: SUPPORTING DOCUMENTS § 251.5 Paper arrival and... authorized agent, owner, or consignee, of a commercial vessel or commercial aircraft arriving in or...

  9. 8 CFR 251.5 - Paper arrival and departure manifests for crew.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 8 Aliens and Nationality 1 2012-01-01 2012-01-01 false Paper arrival and departure manifests for... REGULATIONS ARRIVAL AND DEPARTURE MANIFESTS AND LISTS: SUPPORTING DOCUMENTS § 251.5 Paper arrival and... from the United States must submit arrival and departure manifests in a paper format in accordance...

  10. Does pet arrival trigger prosocial behaviors in individuals with autism?

    PubMed

    Grandgeorge, Marine; Tordjman, Sylvie; Lazartigues, Alain; Lemonnier, Eric; Deleau, Michel; Hausberger, Martine

    2012-01-01

    Alteration of social interactions especially prosocial behaviors--an important aspect of development--is one of the characteristics of autistic disorders. Numerous strategies or therapies are used to improve communication skills or at least to reduce social impairments. Animal-assisted therapies are used widely but their relevant benefits have never been scientifically evaluated. In the present study, we evaluated the association between the presence or the arrival of pets in families with an individual with autism and the changes in his or her prosocial behaviors. Of 260 individuals with autism--on the basis of presence or absence of pets--two groups of 12 individuals and two groups of 8 individuals were assigned to: study 1 (pet arrival after age of 5 versus no pet) and study 2 (pet versus no pet), respectively. Evaluation of social impairment was assessed at two time periods using the 36-items ADI-R algorithm and a parental questionnaire about their child-pet relationships. The results showed that 2 of the 36 items changed positively between the age of 4 to 5 (t(0)) and time of assessment (t(1)) in the pet arrival group (study 1): "offering to share" and "offering comfort". Interestingly, these two items reflect prosocial behaviors. There seemed to be no significant changes in any item for the three other groups. The interactions between individuals with autism and their pets were more--qualitatively and quantitatively--reported in the situation of pet arrival than pet presence since birth. These findings open further lines of research on the impact of pet's presence or arrival in families with an individual with autism. Given the potential ability of individuals with autism to develop prosocial behaviors, related studies are needed to better understand the mechanisms involved in the development of such child-pet relationship. PMID:22870246

  11. Does Pet Arrival Trigger Prosocial Behaviors in Individuals with Autism?

    PubMed Central

    Grandgeorge, Marine; Tordjman, Sylvie; Lazartigues, Alain; Lemonnier, Eric; Deleau, Michel; Hausberger, Martine

    2012-01-01

    Alteration of social interactions especially prosocial behaviors – an important aspect of development – is one of the characteristics of autistic disorders. Numerous strategies or therapies are used to improve communication skills or at least to reduce social impairments. Animal-assisted therapies are used widely but their relevant benefits have never been scientifically evaluated. In the present study, we evaluated the association between the presence or the arrival of pets in families with an individual with autism and the changes in his or her prosocial behaviors. Of 260 individuals with autism - on the basis of presence or absence of pets - two groups of 12 individuals and two groups of 8 individuals were assigned to: study 1 (pet arrival after age of 5 versus no pet) and study 2 (pet versus no pet), respectively. Evaluation of social impairment was assessed at two time periods using the 36-items ADI-R algorithm and a parental questionnaire about their child-pet relationships. The results showed that 2 of the 36 items changed positively between the age of 4 to 5 (t0) and time of assessment (t1) in the pet arrival group (study 1): “offering to share” and “offering comfort”. Interestingly, these two items reflect prosocial behaviors. There seemed to be no significant changes in any item for the three other groups. The interactions between individuals with autism and their pets were more – qualitatively and quantitatively - reported in the situation of pet arrival than pet presence since birth. These findings open further lines of research on the impact of pet’s presence or arrival in families with an individual with autism. Given the potential ability of individuals with autism to develop prosocial behaviors, related studies are needed to better understand the mechanisms involved in the development of such child-pet relationship. PMID:22870246

  12. Separation Assurance and Scheduling Coordination in the Arrival Environment

    NASA Technical Reports Server (NTRS)

    Aweiss, Arwa S.; Cone, Andrew C.; Holladay, Joshua J.; Munoz, Epifanio; Lewis, Timothy A.

    2016-01-01

    Separation assurance (SA) automation has been proposed as either a ground-based or airborne paradigm. The arrival environment is complex because aircraft are being sequenced and spaced to the arrival fix. This paper examines the effect of the allocation of the SA and scheduling functions on the performance of the system. Two coordination configurations between an SA and an arrival management system are tested using both ground and airborne implementations. All configurations have a conflict detection and resolution (CD&R) system and either an integrated or separated scheduler. Performance metrics are presented for the ground and airborne systems based on arrival traffic headed to Dallas/ Fort Worth International airport. The total delay, time-spacing conformance, and schedule conformance are used to measure efficiency. The goal of the analysis is to use the metrics to identify performance differences between the configurations that are based on different function allocations. A surveillance range limitation of 100 nmi and a time delay for sharing updated trajectory intent of 30 seconds were implemented for the airborne system. Overall, these results indicate that the surveillance range and the sharing of trajectories and aircraft schedules are important factors in determining the efficiency of an airborne arrival management system. These parameters are not relevant to the ground-based system as modeled for this study because it has instantaneous access to all aircraft trajectories and intent. Creating a schedule external to the CD&R and the scheduling conformance system was seen to reduce total delays for the airborne system, and had a minor effect on the ground-based system. The effect of an external scheduler on other metrics was mixed.

  13. Research Of Airborne Precision Spacing to Improve Airport Arrival Operations

    NASA Technical Reports Server (NTRS)

    Barmore, Bryan E.; Baxley, Brian T.; Murdoch, Jennifer L.

    2011-01-01

    In September 2004, the European Organization for the Safety of Air Navigation (EUROCONTROL) and the United States Federal Aviation Administration (FAA) signed a Memorandum of Cooperation to mutually develop, modify, test, and evaluate systems, procedures, facilities, and devices to meet the need for safe and efficient air navigation and air traffic control in the future. In the United States and Europe, these efforts are defined within the architectures of the Next Generation Air Transportation System (NextGen) Program and Single European Sky Air Traffic Management Research (SESAR) Program respectively. Both programs have identified Airborne Spacing as a critical component, with Automatic Dependent Surveillance Broadcast (ADS-B) as a key enabler. Increased interest in reducing airport community noise and the escalating cost of aviation fuel has led to the use of Continuous Descent Arrival (CDA) procedures to reduce noise, emissions, and fuel usage compared to current procedures. To provide these operational enhancements, arrival flight paths into terminal areas are planned around continuous vertical descents that are closer to an optimum trajectory than those in use today. The profiles are designed to be near-idle descents from cruise altitude to the Final Approach Fix (FAF) and are typically without any level segments. By staying higher and faster than conventional arrivals, CDAs also save flight time for the aircraft operator. The drawback is that the variation of optimized trajectories for different types and weights of aircraft requires the Air Traffic Controller to provide more airspace around an aircraft on a CDA than on a conventional arrival procedure. This additional space decreases the throughput rate of the destination airport. Airborne self-spacing concepts have been developed to increase the throughput at high-demand airports by managing the inter-arrival spacing to be more precise and consistent using on-board guidance. It has been proposed that the

  14. Arrival condition of spent fuel after storage, handling, and transportation

    SciTech Connect

    Bailey, W.J.; Pankaskie, P.J.; Langstaff, D.C.; Gilbert, E.R.; Rising, K.H.; Schreiber, R.E.

    1982-11-01

    This report presents the results of a study conducted to determine the probable arrival condition of spent light-water reactor (LWR) fuel after handling and interim storage in spent fuel storage pools and subsequent handling and accident-free transport operations under normal or slightly abnormal conditions. The objective of this study was to provide information on the expected condition of spent LWR fuel upon arrival at interim storage or fuel reprocessing facilities or at disposal facilities if the fuel is declared a waste. Results of a literature survey and data evaluation effort are discussed. Preliminary threshold limits for storing, handling, and transporting unconsolidated spent LWR fuel are presented. The difficulty in trying to anticipate the amount of corrosion products (crud) that may be on spent fuel in future shipments is also discussed, and potential areas for future work are listed. 95 references, 3 figures, 17 tables.

  15. The arrival time distribution of EAS at Taro

    NASA Astrophysics Data System (ADS)

    Maeda, T.; Kuramochi, H.; Ono, S.; Sakuyama, H.; Suzuki, N.

    The arrival time distribution of EAS has been observed since 1995 at Taro cosmicray laboratory (200m above sea level). The EAS arrays consist of 1m2 and 0.25m2 scintillation detectors, 0.25m2 fast timing counters and ultra fast Cherenkov detectors (UFC). 169 0.25m2 scintillation detectors are arranged in alattice configuration with a unit distance of 1.5m. UFC is placed at 20m from the center of lattice array. The arrival time distribution has been analyzed with distance from EAS core (r=10-60m). One of the results shows that the radius of corvature increases as shower size (Ne), near to the EAS core.

  16. Arrival Time Distribution by the New Observation System at Taro

    NASA Astrophysics Data System (ADS)

    Sakuyama, H.; Obara, Hitoshi; Kuramochi, Hiroshi; Ono, Shunichi; Origasa, Satoru; Mochida, Akinori; Sakuyama, Hiroshi; Suzuki, Noboru

    2003-07-01

    The arrival time distribution of EAS has been observed by using Ultra Fast Cherenkov detector (UFC) and oscilloscope at Taro observatory since 1995 (sea level 200m). The EAS array is arranged 169 sets of 0.25m2 scintillation detectors in the shape of a lattice at intervals of 1.5m and about 40 scintillation detectors which consists of 1m2 and 0.25m2 is arranged in the peripheral part. Then, it consists of 8 fast timing detectors. The UFC detector is installed in the palce of about 20m from the trigger center. The observation system of a UFC detector was changed from the autumn of 2000. The outline of a new observation system and EAS arrival time distribution are reported.

  17. STS-108 Pilot Mark E. Kelly arrives at KSC

    NASA Technical Reports Server (NTRS)

    2001-01-01

    STS-108 Pilot Mark E. Kelly arrives at KSC KSC-01PD-1706 KENNEDY SPACE CENTER, Fla. -- STS-108 Pilot Mark E. Kelly arrives at KSC in a T-38 jet trainer. He and the rest of the crew will be preparing for launch Nov. 29 on Space Shuttle Endeavour. Liftoff is scheduled for 7:41 p.m. EST. Top priorities for the STS-108 (UF-1) mission of Endeavour are rotation of the International Space Station Expedition Three and Expedition Four crews, bringing water, equipment and supplies to the station in the Multi-Purpose Logistics Module Raffaello, and completion of spacewalk and robotics tasks. Mission Specialists Linda A. Godwin and Daniel M. Tani will take part in the spacewalk to install thermal blankets over two pieces of equipment at the bases of the Space Station's solar wings. Dominic L. Gorie is the commander on the mission.

  18. Applying the ARRIVE Guidelines to an In Vivo Database.

    PubMed

    Karp, Natasha A; Meehan, Terry F; Morgan, Hugh; Mason, Jeremy C; Blake, Andrew; Kurbatova, Natalja; Smedley, Damian; Jacobsen, Julius; Mott, Richard F; Iyer, Vivek; Matthews, Peter; Melvin, David G; Wells, Sara; Flenniken, Ann M; Masuya, Hiroshi; Wakana, Shigeharu; White, Jacqueline K; Lloyd, K C Kent; Reynolds, Corey L; Paylor, Richard; West, David B; Svenson, Karen L; Chesler, Elissa J; de Angelis, Martin Hrabě; Tocchini-Valentini, Glauco P; Sorg, Tania; Herault, Yann; Parkinson, Helen; Mallon, Ann-Marie; Brown, Steve D M

    2015-05-01

    The Animal Research: Reporting of In Vivo Experiments (ARRIVE) guidelines were developed to address the lack of reproducibility in biomedical animal studies and improve the communication of research findings. While intended to guide the preparation of peer-reviewed manuscripts, the principles of transparent reporting are also fundamental for in vivo databases. Here, we describe the benefits and challenges of applying the guidelines for the International Mouse Phenotyping Consortium (IMPC), whose goal is to produce and phenotype 20,000 knockout mouse strains in a reproducible manner across ten research centres. In addition to ensuring the transparency and reproducibility of the IMPC, the solutions to the challenges of applying the ARRIVE guidelines in the context of IMPC will provide a resource to help guide similar initiatives in the future. PMID:25992600

  19. Applying the ARRIVE Guidelines to an In Vivo Database

    PubMed Central

    Karp, Natasha A.; Meehan, Terry F.; Morgan, Hugh; Mason, Jeremy C.; Blake, Andrew; Kurbatova, Natalja; Smedley, Damian; Jacobsen, Julius; Mott, Richard F.; Iyer, Vivek; Matthews, Peter; Melvin, David G.; Wells, Sara; Flenniken, Ann M.; Masuya, Hiroshi; Wakana, Shigeharu; White, Jacqueline K.; Lloyd, K. C. Kent; Reynolds, Corey L.; Paylor, Richard; West, David B.; Svenson, Karen L.; Chesler, Elissa J.; de Angelis, Martin Hrabě; Tocchini-Valentini, Glauco P.; Sorg, Tania; Herault, Yann; Parkinson, Helen; Mallon, Ann-Marie; Brown, Steve D. M.

    2015-01-01

    The Animal Research: Reporting of In Vivo Experiments (ARRIVE) guidelines were developed to address the lack of reproducibility in biomedical animal studies and improve the communication of research findings. While intended to guide the preparation of peer-reviewed manuscripts, the principles of transparent reporting are also fundamental for in vivo databases. Here, we describe the benefits and challenges of applying the guidelines for the International Mouse Phenotyping Consortium (IMPC), whose goal is to produce and phenotype 20,000 knockout mouse strains in a reproducible manner across ten research centres. In addition to ensuring the transparency and reproducibility of the IMPC, the solutions to the challenges of applying the ARRIVE guidelines in the context of IMPC will provide a resource to help guide similar initiatives in the future. PMID:25992600

  20. Expedition 4 crew member Daniel W. Bursch arrives at KSC

    NASA Technical Reports Server (NTRS)

    2001-01-01

    Expedition 4 crew member Daniel W. Bursch arrives at KSC KSC-01PD-1705 KENNEDY SPACE CENTER, Fla. - Expedition 4 crew member Daniel W. Bursch arrives at KSC in a T-38 jet trainer. He and other crew members Commander Yuri Onufrienko and astronaut Carl E. Walz will be traveling on Space Shuttle Endeavour - mission STS-108 - to replace the Expedition 3 crew. Top priorities for the STS-108 (UF-1) mission of Endeavour are rotation of the International Space Station Expedition Three and Expedition Four crews, bringing water, equipment and supplies to the station in the Multi-Purpose Logistics Module Raffaello, and completion of spacewalk and robotics tasks. The mission crew comprises Commander Dominic L. Gorie, Pilot Mark E. Kelly and Mission Specialists Linda A. Godwin and Daniel M. Tani. Liftoff is scheduled for 7:41 p.m. EST..

  1. Queuing model of a traffic bottleneck with bimodal arrival rate

    NASA Astrophysics Data System (ADS)

    Woelki, Marko

    2016-06-01

    This paper revisits the problem of tuning the density in a traffic bottleneck by reduction of the arrival rate when the queue length exceeds a certain threshold, studied recently for variants of totally asymmetric simple exclusion process (TASEP) and Burgers equation. In the present approach, a simple finite queuing system is considered and its contrasting “phase diagram” is derived. One can observe one jammed region, one low-density region and one region where the queue length is equilibrated around the threshold. Despite the simplicity of the model the physics is in accordance with the previous approach: The density is tuned at the threshold if the exit rate lies in between the two arrival rates.

  2. Crewmen of the Gemini 7 spacecraft arrive aboard aircraft carrier

    NASA Technical Reports Server (NTRS)

    1965-01-01

    Astronauts James A. Lovell Jr., (left), pilot, and Frank Borman, command pilot, are shown just after they arrived aboard the aircraft carrier U.S.S. Wasp. Greeting the astronauts are Donald Stullken (at Lovell's right), Recovery Operations Branch, Landing and Recovery Division; Dr. Howard Minners (standing beside Borman), Flight Medicine Branch, Cneter Medical Office, Manned Spacecraft Center, and Bennett James (standing behind Borman), a NASA Public Affairs Officer.

  3. STS-86 Mission Specialist Chretien arrives at SLF before launch

    NASA Technical Reports Server (NTRS)

    1997-01-01

    STS-86 Mission Specialist Jean-Loup J.M. Chretien of the French Space Agency, CNES, arrives at KSCs Shuttle Landing Facility for the final prelaunch activities leading up to the scheduled Sept. 25 liftoff. This will be Chretiens third spaceflight, but first on the Space Shuttle. He is chief of the Astronaut Office of CNES. STS-86 is slated to be the seventh of nine planned dockings of the Space Shuttle with the Russian Space Station Mir.

  4. Miracle or Menace?: The Arrival of Cocaine 1860-1900.

    PubMed

    Jay, Mike

    2015-01-01

    The arrival of cocaine was the formative episode in the modern understanding of the benefits and dangers of neurostimulants. European culture and medicine had historically been poor in stimulant plants and drugs. When coca and cocaine appeared in nineteenth-century Europe, doctors, pharmacists, and the public struggled to understand their benefits and risks, and to formulate a distinction between use and abuse. PMID:26070752

  5. Evaluating predictions of ICME arrival at Earth and Mars

    NASA Astrophysics Data System (ADS)

    Falkenberg, T. V.; Taktakishvili, A.; Pulkkinen, A.; Vennerstrom, S.; Odstrcil, D.; Brain, D.; Delory, G.; Mitchell, D.

    2011-09-01

    We present a study of interplanetary coronal mass ejection (ICME) propagation to Earth and Mars. Because of the significant space weather hazard posed by ICMEs, understanding and predicting their arrival and impact at Mars is important for current and future robotic and manned missions to the planet. We compare running ENLILv2.6 with coronal mass ejection (CME) input parameters from both a manual and an automated method. We analyze shock events identified at Mars in Mars Global Surveyor data in 2001 and 2003, when Earth and Mars were separated by <80° in heliocentric longitude. The shocks identified at Mars were also identified at Earth, and the majority of the shock sources were identified through the Solar and Heliospheric Observatory-Large Angle and Spectrometric Coronagraph catalogue. We find that arrival times predicted by the two methods at both planets are statistically similar, dynamic pressures predicted when using the automated method are better, and the automated method tends to underestimate both CME width and speed. Using the location of the related flare as the CME direction did not improve results. In addition, changing the CME speed toward the plane-of-sky speed at 20 RS improves the match to observations, mainly because the speed found by the automated method is underestimated. The time lapse between the shock arrival at Earth and Mars, for the events studied here, is shorter than expected from simulations, and the presence of high speed streams can enable an ICME to arrive almost simultaneously at Earth and Mars. This work will be applied to improve the input parameter methods for ENLIL.

  6. STS-82 Payload Commander Mark Lee arrives for TCDT

    NASA Technical Reports Server (NTRS)

    1997-01-01

    STS-82 Payload Commander Mark C. Lee grins for the cameras after he arrives via T-38 jet from Houston, TX, at KSCs Shuttle Landing Facility. Lee and the other six crew members are at KSC to participate in the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. The crew aboard the Space Shuttle Discovery on STS-82 will conduct the second Hubble Space Telescope servicing mission. The 10-day flight is targeted for a Feb. 11 liftoff.

  7. Cardiopulmonary arrest on arrival due to penetrating trauma

    PubMed Central

    Moriwaki, Yoshihiro; Sugiyama, Mitsugi; Toyoda, Hiroshi; Kosuge, Takayuki; Tahara, Yoshio; Suzuki, Noriyuki

    2010-01-01

    INTRODUCTION The aim of this study was to clarify the outcome of patients with cardiopulmonary arrest on arrival due to penetrating trauma (PT-CPA) and to establish the treatment strategy. PATIENTS AND METHODS The clinical course of 29 patients with PT-CPA over the past 10 years was examined. We have taken three approaches to these patients: (i) an aggressive treatment strategy; (ii) an in-hospital system supporting this aggressive resuscitation; and (iii) the pre-hospital emergency medical service (EMS) system in our city. RESULTS Although the return of spontaneous circulation (ROSC) was established in 59% of patients, only 17% survived for 7 days, 14% were discharged, and 7% were neurologically intact. Of 10 patients showing pulseless electrical activity (PEA) on the scene, ROSC was established in 100% and 30% were discharged; however, of 12 patients showing asystole, ROSC was established in 33% and no patient could be discharged. There was no difference in the time interval from the arrival at the emergency department to ROSC between discharged patients and patients who died. The time interval from collapse to arrival at the emergency department in discharged patients and patients who went to the intensive care unit was shorter than that of patients who died in the emergency department with and without ROSC. CONCLUSIONS We cannot decide to give up and terminate resuscitation in any PT-CPA patients and cannot define salvageable patients. However, our data show that 30-min resuscitation is thought to be relevant and that we should not give up on resuscitation because of the time interval without ROSC after arrival at the hospital. PMID:20353643

  8. A study of the arrival direction using Offline

    SciTech Connect

    Flores, Alejandra Parra; Bravo, Oscar Martinez; Ibargueen, Humberto Salazar; Aguilar, Ibrahim Torres

    2009-04-30

    The purpose of this work is to show the results of the analysis of a library of synthetic data corresponding to Very Inclined Showers (i.e. those with a zenith angle between 60 and 80 degrees and energies from 50 EeV to 80 EeV). Simulations were performed using the Aires software and then analyzed to narrow down the arrival angles that allow us an efficient shower reconstruction using the Offline software.

  9. STS-80 Crew Arrival (Mission Specialist Story Musgrave)

    NASA Technical Reports Server (NTRS)

    1996-01-01

    STS-80 Mission Specialist Story Musgrave and four fellow crew members arrive at KSC's Shuttle Landing Facility as preparations continue for launch of the final Shuttle flight of 1996. Tomorrow, Nov. 12, the launch countdown will begin at 1 p.m. with the countdown clock set at T-43 hours. The Space Shuttle Columbia is scheduled for liftoff from Launch Pad 39B at 2:50 p.m. EST, Nov. 15.

  10. NOAA-L satellite arrives at Vandenberg AFB

    NASA Technical Reports Server (NTRS)

    2000-01-01

    A crated National Oceanic and Atmospheric Administration (NOAA-L) satellite arrives at Vandenberg Air Force Base, Calif. It is part of the Polar-Orbiting Operational Environmental Satellite (POES) program that provides atmospheric measurements of temperature, humidity, ozone and cloud images, tracking weather patterns that affect the global weather and climate. The launch of the NOAA-L satellite is scheduled no earlier than Sept. 12 aboard a Lockheed Martin Titan II rocket. Community assembly in experimental grasslands: suitable environment or timely arrival?

    PubMed

    Ejrnaes, Rasmus; Bruun, Hans Henrik; Graae, Bente J

    2006-05-01

    It is hard to defend the view that biotic communities represent a simple and predictable response to the abiotic environment. Biota and the abiotic environment interact, and the environment of an individual certainly includes its neighbors and visitors in the community. The complexity of community assembly calls forth a quest for general principles, yet current results and theories on assembly rules differ widely. Using a grassland microcosm as a model system, we manipulated fertility, disturbance by defoliation, soil/microclimate, and arrival order of species belonging to two groups differing in functional attributes. We analyzed the outcome of community assembly dynamics in terms of species richness, invasibility, and species composition. The analyses revealed strong environmental control over species richness and invasibility. Species composition was mainly determined by the arrival order of species, indicating that historical contingency may change the outcome of community assembly. The probability for multiple equilibria appeared to increase with productivity and environmental stability. The importance of arrival order offers an explanation of the difficulties in predicting local occurrences of species in the field. In our experiment, variation in fertility and disturbance was controlling colonization with predictable effects on emergent community properties such as species richness. The key mechanism is suggested to be asymmetric competition, and our results show that this mechanism is relatively insensitive to the species through which it works. While our analyses indicate a positive and significant correlation between richness and invasibility, the significance disappears after accounting for the effect of the environment. The importance of arrival order (historical contingency) and environmental control supports the assumption of the unified neutral theory that different species within a trophic level can be considered functionally equivalent when it comes

  11. STS-104 MS Reilly arrives at the SLF before launch

    NASA Technical Reports Server (NTRS)

    2001-01-01

    KENNEDY SPACE CENTER, Fla. -- STS-104 Mission Specialist James F. Reilly arrives at the KSC Shuttle Landing Facility to make final preparations for launch of Space Shuttle Atlantis July 12. The mission is the 10th assembly flight to the International Space Station and carries the Joint Airlock Module, which will become the primary path for spacewalk entry and departure using both U.S. spacesuits and the Russian Orlan spacesuit for EVA activity.

  12. STS-104 MS Kavandi arrives at the SLF before launch

    NASA Technical Reports Server (NTRS)

    2001-01-01

    KENNEDY SPACE CENTER, Fla. -- STS-104 Mission Specialist Janet Lynn Kavandi arrives at the KSC Shuttle Landing Facility to make final preparations for launch of Space Shuttle Atlantis July 12. The mission is the 10th assembly flight to the International Space Station and carries the Joint Airlock Module, which will become the primary path for spacewalk entry and departure using both U.S. spacesuits and the Russian Orlan spacesuit for EVA activity.

  13. STS-104 MS Gernhardt arrives at the SLF before launch

    NASA Technical Reports Server (NTRS)

    2001-01-01

    KENNEDY SPACE CENTER, Fla. -- STS-104 Mission Specialist Michael L. Gernhardt arrives at the KSC Shuttle Landing Facility to make final preparations for launch of Space Shuttle Atlantis July 12. The mission is the 10th assembly flight to the International Space Station and carries the Joint Airlock Module, which will become the primary path for spacewalk entry and departure using both U.S. spacesuits and the Russian Orlan spacesuit for EVA activity.

  14. Quantum arrival and dwell times via idealized clocks

    SciTech Connect

    Yearsley, J. M.; Downs, D. A.; Halliwell, J. J.; Hashagen, A. K.

    2011-08-15

    A number of approaches to the problem of defining arrival- and dwell-time probabilities in quantum theory makes use of idealized models of clocks. An interesting question is the extent to which the probabilities obtained in this way are related to standard semiclassical results. In this paper, we explore this question using a reasonably general clock model, solved using path-integral methods. We find that, in the weak-coupling regime, where the energy of the clock is much less than the energy of the particle it is measuring, the probability for the clock pointer can be expressed in terms of the probability current in the case of arrival times, and the dwell-time operator in the case of dwell times, the expected semiclassical results. In the regime of strong system-clock coupling, we find that the arrival-time probability is proportional to the kinetic-energy density, consistent with an earlier model involving a complex potential. We argue that, properly normalized, this may be the generically expected result in this regime. We show that these conclusions are largely independent of the form of the clock Hamiltonian.

  15. NASA's ATM Technology Demonstration-1: Integrated Concept of Arrival Operations

    NASA Technical Reports Server (NTRS)

    Baxley, Brian T.; Swenson, Harry N.; Prevot, Thomas; Callantine, Todd J.

    2012-01-01

    This paper describes operations and procedures envisioned for NASA s Air Traffic Management (ATM) Technology Demonstration #1 (ATD-1). The ATD-1 Concept of Operations (ConOps) demonstration will integrate three NASA technologies to achieve high throughput, fuel-efficient arrival operations into busy terminal airspace. They are Traffic Management Advisor with Terminal Metering (TMA-TM) for precise time-based schedules to the runway and points within the terminal area, Controller-Managed Spacing (CMS) decision support tools for terminal controllers to better manage aircraft delay using speed control, and Flight deck Interval Management (FIM) avionics and flight crew procedures to conduct airborne spacing operations. The ATD-1 concept provides de-conflicted and efficient operations of multiple arrival streams of aircraft, passing through multiple merge points, from top-of-descent (TOD) to touchdown. It also enables aircraft to conduct Optimized Profile Descents (OPDs) from en route altitude to the runway, using primarily speed control to maintain separation and schedule. The ATD-1 project is currently addressing the challenges of integrating the three technologies, and implantation into an operational environment. Goals of the ATD-1 demonstration include increasing the throughput of high-density airports, reducing controller workload, increasing efficiency of arrival operations and the frequency of trajectory-based operations, and promoting aircraft ADS-B equipage.

  16. Design Principles and Algorithms for Air Traffic Arrival Scheduling

    NASA Technical Reports Server (NTRS)

    Erzberger, Heinz; Itoh, Eri

    2014-01-01

    This report presents design principles and algorithms for building a real-time scheduler of arrival aircraft based on a first-come-first-served (FCFS) scheduling protocol. The algorithms provide the conceptual and computational foundation for the Traffic Management Advisor (TMA) of the Center/terminal radar approach control facilities (TRACON) automation system, which comprises a set of decision support tools for managing arrival traffic at major airports in the United States. The primary objective of the scheduler is to assign arrival aircraft to a favorable landing runway and schedule them to land at times that minimize delays. A further objective of the scheduler is to allocate delays between high-altitude airspace far away from the airport and low-altitude airspace near the airport. A method of delay allocation is described that minimizes the average operating cost in the presence of errors in controlling aircraft to a specified landing time. This report is a revision of an earlier paper first presented as part of an Advisory Group for Aerospace Research and Development (AGARD) lecture series in September 1995. The authors, during vigorous discussions over the details of this paper, felt it was important to the air-trafficmanagement (ATM) community to revise and extend the original 1995 paper, providing more detail and clarity and thereby allowing future researchers to understand this foundational work as the basis for the TMA's scheduling algorithms.

  17. Analysis of sequencing and scheduling methods for arrival traffic

    NASA Technical Reports Server (NTRS)

    Neuman, Frank; Erzberger, Heinz

    1990-01-01

    The air traffic control subsystem that performs scheduling is discussed. The function of the scheduling algorithms is to plan automatically the most efficient landing order and to assign optimally spaced landing times to all arrivals. Several important scheduling algorithms are described and the statistical performance of the scheduling algorithms is examined. Scheduling brings order to an arrival sequence for aircraft. First-come-first-served scheduling (FCFS) establishes a fair order, based on estimated times of arrival, and determines proper separations. Because of the randomness of the traffic, gaps will remain in the scheduled sequence of aircraft. These gaps are filled, or partially filled, by time-advancing the leading aircraft after a gap while still preserving the FCFS order. Tightly scheduled groups of aircraft remain with a mix of heavy and large aircraft. Separation requirements differ for different types of aircraft trailing each other. Advantage is taken of this fact through mild reordering of the traffic, thus shortening the groups and reducing average delays. Actual delays for different samples with the same statistical parameters vary widely, especially for heavy traffic.

  18. Contributed Review: Source-localization algorithms and applications using time of arrival and time difference of arrival measurements

    NASA Astrophysics Data System (ADS)

    Li, Xinya; Deng, Zhiqun Daniel; Rauchenstein, Lynn T.; Carlson, Thomas J.

    2016-04-01

    Locating the position of fixed or mobile sources (i.e., transmitters) based on measurements obtained from sensors (i.e., receivers) is an important research area that is attracting much interest. In this paper, we review several representative localization algorithms that use time of arrivals (TOAs) and time difference of arrivals (TDOAs) to achieve high signal source position estimation accuracy when a transmitter is in the line-of-sight of a receiver. Circular (TOA) and hyperbolic (TDOA) position estimation approaches both use nonlinear equations that relate the known locations of receivers and unknown locations of transmitters. Estimation of the location of transmitters using the standard nonlinear equations may not be very accurate because of receiver location errors, receiver measurement errors, and computational efficiency challenges that result in high computational burdens. Least squares and maximum likelihood based algorithms have become the most popular computational approaches to transmitter location estimation. In this paper, we summarize the computational characteristics and position estimation accuracies of various positioning algorithms. By improving methods for estimating the time-of-arrival of transmissions at receivers and transmitter location estimation algorithms, transmitter location estimation may be applied across a range of applications and technologies such as radar, sonar, the Global Positioning System, wireless sensor networks, underwater animal tracking, mobile communications, and multimedia.

  19. Contributed Review: Source-localization algorithms and applications using time of arrival and time difference of arrival measurements.

    PubMed

    Li, Xinya; Deng, Zhiqun Daniel; Rauchenstein, Lynn T; Carlson, Thomas J

    2016-04-01

    Locating the position of fixed or mobile sources (i.e., transmitters) based on measurements obtained from sensors (i.e., receivers) is an important research area that is attracting much interest. In this paper, we review several representative localization algorithms that use time of arrivals (TOAs) and time difference of arrivals (TDOAs) to achieve high signal source position estimation accuracy when a transmitter is in the line-of-sight of a receiver. Circular (TOA) and hyperbolic (TDOA) position estimation approaches both use nonlinear equations that relate the known locations of receivers and unknown locations of transmitters. Estimation of the location of transmitters using the standard nonlinear equations may not be very accurate because of receiver location errors, receiver measurement errors, and computational efficiency challenges that result in high computational burdens. Least squares and maximum likelihood based algorithms have become the most popular computational approaches to transmitter location estimation. In this paper, we summarize the computational characteristics and position estimation accuracies of various positioning algorithms. By improving methods for estimating the time-of-arrival of transmissions at receivers and transmitter location estimation algorithms, transmitter location estimation may be applied across a range of applications and technologies such as radar, sonar, the Global Positioning System, wireless sensor networks, underwater animal tracking, mobile communications, and multimedia. PMID:27131647

  1. The Education Election: Guess Who's Coming to School.

    ERIC Educational Resources Information Center

    Weisman, Jonathan

    2000-01-01

    Describes Vice President Al Gore's 2000 presidential campaign efforts at one Michigan high school, from the arrival of advance Secret Service agents to scope out the school, to determination of what the Vice President would do during his 7-hour visit, to who would host the Vice President, to how students and staff responded to the visit. (SM)

  2. Incorporating fault zone head wave and direct wave secondary arrival times into seismic tomography: Application at Parkfield, California

    NASA Astrophysics Data System (ADS)

    Bennington, N. L.; Thurber, C. H.; Zhang, H.; Peng, Z.; Zhao, P.

    2011-12-01

    Large crustal faults such as the San Andreas fault (SAF) often juxtapose rocks of significantly different elastic properties, resulting in well-defined bimaterial interfaces. A sharp material contrast across the fault interface is expected to generate fault zone head waves (FZHW's) that spend a large portion of their propagation paths refracting along the bimaterial interface (Ben-Zion 1989, 1990; Ben-Zion & Aki 1990). Because of this FZHW's provide a high-resolution tool for imaging the velocity contrast across the fault. Recently, Zhao et al. (2010) systematically analyzed large data sets of near-fault waveforms recorded by several permanent and temporary seismic networks along the Parkfield section of the SAF. The local-scale tomography study of Zhang et al. (2009) for a roughly 10 km3 volume centered on SAFOD and the more regional-scale study of Thurber et al. (2006) for a 130 km x 120 km x 20 km volume centered on the 2004 Parkfield earthquake rupture provide what are probably the best 3D images of the seismic velocity structure of the area. The former shows a low velocity zone associated with the SAF extending to significant depth, and both image the well-known velocity contrast across the fault. Seismic tomography generally uses just first P and/or S arrivals because of the relative simplicity of phase picking and ray tracing. Adding secondary arrivals such as FZHW's, however, can enhance the resolution of structure and strengthen constraints on earthquake locations and focal mechanisms. We present a model of 3D velocity structure for the Parkfield region that utilizes a combination of arrival times for FZHW's and the associated direct-wave secondary arrivals as well as existing P-wave arrival time data. The resulting image provides a higher-resolution model of the SAF at depth than previously published models. In addition, we plan to measure polarizations of the direct P and S waves and FZHW's and incorporate the data into our updated velocity tomography

  3. The Effects of Predator Arrival Timing on Adaptive Radiation (Invited)

    NASA Astrophysics Data System (ADS)

    Borden, J.; Knope, M. L.; Fukami, T.

    2009-12-01

    Much of Earth’s biodiversity is thought to have arisen by adaptive radiation, the rapid diversification of a single ancestral species to fill a wide-variety of ecological niches. Both theory and empirical evidence have long supported competition for limited resources as a primary driver of adaptive radiation. While predation has also been postulated to be an important selective force during radiation, empirical evidence is surprisingly scant and its role remains controversial. However, two recent empirical studies suggest that predation can promote divergence during adaptive radiation. Using an experimental laboratory microcosm system, we examined how predator arrival timing affects the rate and extent of diversification during adaptive radiation. We varied the introduction timing of a protozoan predator (Tetrahymena thermophila) into populations of the bacteria Pseudomonas flourescens, which is known for its ability to undergo rapid adaptive radiation in aqueous microcosms. While our results show that predator arrival timing may have a significant impact on the rate, but not extent, of diversification, these results are tenuous and should be interpreted with caution, as the protozoan predators died early in the majority of our treatments, hampering our ability for comparison across treatments. Additionally, the abundance of newly derived bacterial genotypes was markedly lower in all treatments than observed in previous experiments utilizing this microbial experimental evolution system. To address these shortcomings, we will be repeating the experiment in the near future to further explore the impact of predator arrival timing on adaptive radiation. Smooth Morph and small-Wrinkly Spreader Pseudomonas flourescens diversification in the 96 hour treatment. Day 10, diluted to 1e-5.

  4. Automated Conflict Resolution, Arrival Management and Weather Avoidance for ATM

    NASA Technical Reports Server (NTRS)

    Erzberger, H.; Lauderdale, Todd A.; Chu, Yung-Cheng

    2010-01-01

    The paper describes a unified solution to three types of separation assurance problems that occur in en-route airspace: separation conflicts, arrival sequencing, and weather-cell avoidance. Algorithms for solving these problems play a key role in the design of future air traffic management systems such as NextGen. Because these problems can arise simultaneously in any combination, it is necessary to develop integrated algorithms for solving them. A unified and comprehensive solution to these problems provides the foundation for a future air traffic management system that requires a high level of automation in separation assurance. The paper describes the three algorithms developed for solving each problem and then shows how they are used sequentially to solve any combination of these problems. The first algorithm resolves loss-of-separation conflicts and is an evolution of an algorithm described in an earlier paper. The new version generates multiple resolutions for each conflict and then selects the one giving the least delay. Two new algorithms, one for sequencing and merging of arrival traffic, referred to as the Arrival Manager, and the other for weather-cell avoidance are the major focus of the paper. Because these three problems constitute a substantial fraction of the workload of en-route controllers, integrated algorithms to solve them is a basic requirement for automated separation assurance. The paper also reviews the Advanced Airspace Concept, a proposed design for a ground-based system that postulates redundant systems for separation assurance in order to achieve both high levels of safety and airspace capacity. It is proposed that automated separation assurance be introduced operationally in several steps, each step reducing controller workload further while increasing airspace capacity. A fast time simulation was used to determine performance statistics of the algorithm at up to 3 times current traffic levels.

  5. 19 CFR 123.6 - Train sheet for arriving railroad trains.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...; DEPARTMENT OF THE TREASURY CUSTOMS RELATIONS WITH CANADA AND MEXICO General Provisions § 123.6 Train sheet for arriving railroad trains. The conductor of a railroad train arriving from Canada or Mexico...

  6. 77 FR 49056 - Categorical Exclusion From Further Environmental Review for Standard Terminal Arrival Route...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-15

    ... Terminal Arrival Route Procedures and Standard Instrument Departure Procedures for Washington Dulles... review of two standard terminal arrival route (STAR) procedures and two standard instrument departure... terminal area procedures. The review process indicated that the proposed project will not adversely...

  7. First Apollo 11 sample return containers arrive at Ellington AFB

    NASA Technical Reports Server (NTRS)

    1969-01-01

    The first Apollo 11 sample return container, containing lunar surface material, arrives at Ellington Air Force Base by air from the Pacific recovery area. Happily posing for photographs with the rock box are (left to right) George M. Low, Manager, Apollo Spacecraft Program, Manned Spacecraft Center (MSC); U.S. Air Force Lt. Gen. Samuel C. Phillips, Apollo Program Director, Office of Manned Space Flight, NASA HQ.; George S. Trimble, MSC Deputy Director (almost obscured); Eugene G. Edmonds, MSC Photographic Technology Laboratory; RIchard S. Johnston (in back), Special Assistant to the MSC Director; Dr. Thomas O. Paine, NASA Administrator; and Dr. Robert R. Gilruth, MSC Director.

  8. STS-113 Pilot Lockhart arrives at KSC for TCDT

    NASA Technical Reports Server (NTRS)

    2002-01-01

    KENNEDY SPACE CENTER, FLA. -- STS-113 Pilot Paul Lockhart arrives at KSC for Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. The primary payloads on mission STS-113 are the first port truss segment, P1, and the Crew and Equipment Translation Aid (CETA) Cart B. Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. Also onboard Space Shuttle Endeavour will be the Expedition 6 crew who will replace Expedition 5, returning to Earth after 4 months. The STS-113 launch is scheduled for Nov. 10, 2002. .

  9. Internet information arrival and volatility of SME PRICE INDEX

    NASA Astrophysics Data System (ADS)

    Zhang, Yongjie; Feng, Lina; Jin, Xi; Shen, Dehua; Xiong, Xiong; Zhang, Wei

    2014-04-01

    This article employs the number of news appeared in Baidu News as a novel proxy for information arrival and investigates the validation of the Mixture of Distribution Hypothesis (MDH) using a sample of SME PRICE INDEX in China. The empirical results reveal a positive impact of internet information on the conditional volatility of stock returns. Compared with the prevailing proxies (trading volume and its adjustments), the volatility persistence is most decreased when this novel proxy is incorporated into the conditional variance equation of the GARCH model. Some tentative explanations are also given to expound the non-disappeared GARCH effects.

  10. Atlas IIA/Centaur rocket arrives at CCAFS

    NASA Technical Reports Server (NTRS)

    2000-01-01

    At Cape Canaveral Air Force skid strip, the Centaur upper stage is placed aboard a transporter after arriving aboard a Russian cargo plane, the Antenov 124. The Centaur will be coupled with an Atlas IIA to launch the latest Tracking and Data Relay Satellite (TDRS) June 29 from Cape Canaveral Air Force Station. The Centaur, manufactured and operated by Lockheed Martin, is 3.05 m (10 ft) in diameter and 10.0 m (33-ft) long. It uses liquid hydrogen (LH2) and liquid oxygen (LO2) propellants.

  11. Atlas IIA/Centaur rocket arrives at CCAFS

    NASA Technical Reports Server (NTRS)

    2000-01-01

    - A Russian cargo plane, the Antenov 124, arrives at Cape Canaveral Air Force skid strip to deliver the Atlas IIA/Centaur rocket scheduled to launch the latest Tracking and Data Relay Satellite (TDRS) June 29 from Cape Canaveral Air Force Station. Visible is the Centaur upper stage, manufactured and operated by Lockheed Martin. The Centaur vehicle is 3.05 m (10 ft) in diameter and 10.0 m (33-ft) long. It uses liquid hydrogen (LH2) and liquid oxygen (LO2) propellants.

  12. GMTI Direction of Arrival Measurements from Multiple Phase Centers.

    SciTech Connect

    Doerry, Armin W.; Bickel, Douglas L.

    2015-03-01

    Ground Moving Target Indicator (GMTI) radar attempts to detect and locate targets with unknown motion. Very slow-moving targets are difficult to locate in the presence of surrounding clutter. This necessitates multiple antenna phase centers (or equivalent) to offer independent Direction of Arrival (DOA) measurements. DOA accuracy and precision generally remains dependent on target Signal-to-Noise Ratio (SNR), Clutter-toNoise Ratio (CNR), scene topography, interfering signals, and a number of antenna parameters. This is true even for adaptive techniques like Space-Time-AdaptiveProcessing (STAP) algorithms.

  13. STS-87 Ukrainian Payload Specialist Kadenyuk arrives at SLF

    NASA Technical Reports Server (NTRS)

    1997-01-01

    STS-87 Payload Specialist Leonid Kadenyuk of the National Space Agency of Ukraine arrives at Kennedy Space Center's Shuttle Landing Facility aboard a T-38 jet for the final prelaunch activities leading up to the scheduled Nov. 19 liftoff. The other STS-87 crew members are Commander Kevin Kregel; Pilot Steven Lindsey; and Mission Specialists Kalpana Chawla, Ph.D.; Takao Doi, Ph.D., of the National Space Development Agency of Japan; and Winston Scott. STS-87 will be the fourth flight of the United States Microgravity Payload and the Spartan-201 deployable satellite.

  14. Titan III Mars Observer Arrival and Uncrating at PHSF

    NASA Technical Reports Server (NTRS)

    1992-01-01

    Live footage of the uncrating and the arrival of the Titan III Mars Observer to the Payload Hazardous Servicing Facility (PHSF) is presented. The Mars Observer's mission is to study the surface, atmosphere, interior and magnetic field of Mars from Martian orbit. At the PHSF, fueling of the spacecraft with its orbit insertion and attitude control propellants will occur. This will be followed by mating to the Transfer Orbit Stage (TOS). This is the upper stage that will provide the final thrust to propel the spacecraft on its 11-month journey to Mars.

  15. 19 CFR 4.4 - Panama Canal; report of arrival required.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 1 2014-04-01 2014-04-01 false Panama Canal; report of arrival required. 4.4... OF THE TREASURY VESSELS IN FOREIGN AND DOMESTIC TRADES Arrival and Entry of Vessels § 4.4 Panama Canal; report of arrival required. Vessels which merely transit the Panama Canal without transacting...

  16. 19 CFR 4.4 - Panama Canal; report of arrival required.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 1 2013-04-01 2013-04-01 false Panama Canal; report of arrival required. 4.4... OF THE TREASURY VESSELS IN FOREIGN AND DOMESTIC TRADES Arrival and Entry of Vessels § 4.4 Panama Canal; report of arrival required. Vessels which merely transit the Panama Canal without transacting...

  17. 19 CFR 4.4 - Panama Canal; report of arrival required.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 1 2012-04-01 2012-04-01 false Panama Canal; report of arrival required. 4.4... OF THE TREASURY VESSELS IN FOREIGN AND DOMESTIC TRADES Arrival and Entry of Vessels § 4.4 Panama Canal; report of arrival required. Vessels which merely transit the Panama Canal without transacting...

  18. 19 CFR 4.4 - Panama Canal; report of arrival required.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Panama Canal; report of arrival required. 4.4... OF THE TREASURY VESSELS IN FOREIGN AND DOMESTIC TRADES Arrival and Entry of Vessels § 4.4 Panama Canal; report of arrival required. Vessels which merely transit the Panama Canal without transacting...

  19. 19 CFR 4.4 - Panama Canal; report of arrival required.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Panama Canal; report of arrival required. 4.4... OF THE TREASURY VESSELS IN FOREIGN AND DOMESTIC TRADES Arrival and Entry of Vessels § 4.4 Panama Canal; report of arrival required. Vessels which merely transit the Panama Canal without transacting...

  20. 14 CFR 93.27 - Sale and lease of Arrival Authorizations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Reduction at Chicago O'Hare International Airport § 93.27 Sale and lease of Arrival Authorizations. (a) No U.S. or Canadian air carriers may sell or lease its Arrival Authorizations at O'Hare except in... purchase an Arrival Authorization at O'Hare. The Carrier may submit information in writing or via the...

  1. 9 CFR 96.6 - Certified foreign animal casings arriving at seaboard or border port.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... arriving at seaboard or border port. 96.6 Section 96.6 Animals and Animal Products ANIMAL AND PLANT HEALTH... STATES § 96.6 Certified foreign animal casings arriving at seaboard or border port. (a) Properly certified foreign animal casings arriving in the United States at a seaboard or border port where an...

  2. 9 CFR 96.6 - Certified foreign animal casings arriving at seaboard or border port.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... arriving at seaboard or border port. 96.6 Section 96.6 Animals and Animal Products ANIMAL AND PLANT HEALTH... STATES § 96.6 Certified foreign animal casings arriving at seaboard or border port. (a) Properly certified foreign animal casings arriving in the United States at a seaboard or border port where an...

  3. 19 CFR 123.6 - Train sheet for arriving railroad trains.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Train sheet for arriving railroad trains. 123.6 Section 123.6 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY... arriving railroad trains. The conductor of a railroad train arriving from Canada or Mexico shall present...

  4. 19 CFR 123.6 - Train sheet for arriving railroad trains.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 1 2014-04-01 2014-04-01 false Train sheet for arriving railroad trains. 123.6 Section 123.6 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY... arriving railroad trains. The conductor of a railroad train arriving from Canada or Mexico shall present...

  5. 19 CFR 123.6 - Train sheet for arriving railroad trains.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 1 2012-04-01 2012-04-01 false Train sheet for arriving railroad trains. 123.6 Section 123.6 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY... arriving railroad trains. The conductor of a railroad train arriving from Canada or Mexico shall present...

  6. 19 CFR 123.6 - Train sheet for arriving railroad trains.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 1 2013-04-01 2013-04-01 false Train sheet for arriving railroad trains. 123.6 Section 123.6 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY... arriving railroad trains. The conductor of a railroad train arriving from Canada or Mexico shall present...

  7. Airborne Management of Traffic Conflicts in Descent With Arrival Constraints

    NASA Technical Reports Server (NTRS)

    Doble, Nathan A.; Barhydt, Richard; Krishnamurthy, Karthik

    2005-01-01

    NASA is studying far-term air traffic management concepts that may increase operational efficiency through a redistribution of decisionmaking authority among airborne and ground-based elements of the air transportation system. One component of this research, En Route Free Maneuvering, allows trained pilots of equipped autonomous aircraft to assume responsibility for traffic separation. Ground-based air traffic controllers would continue to separate traffic unequipped for autonomous operations and would issue flow management constraints to all aircraft. To evaluate En Route Free Maneuvering operations, a human-in-the-loop experiment was jointly conducted by the NASA Ames and Langley Research Centers. In this experiment, test subject pilots used desktop flight simulators to resolve conflicts in cruise and descent, and to adhere to air traffic flow constraints issued by test subject controllers. Simulators at NASA Langley were equipped with a prototype Autonomous Operations Planner (AOP) flight deck toolset to assist pilots with conflict management and constraint compliance tasks. Results from the experiment are presented, focusing specifically on operations during the initial descent into the terminal area. Airborne conflict resolution performance in descent, conformance to traffic flow management constraints, and the effects of conflicting traffic on constraint conformance are all presented. Subjective data from subject pilots are also presented, showing perceived levels of workload, safety, and acceptability of autonomous arrival operations. Finally, potential AOP functionality enhancements are discussed along with suggestions to improve arrival procedures.

  8. Optimal Integration of Departure and Arrivals in Terminal Airspace

    NASA Technical Reports Server (NTRS)

    Xue, Min; Zelinski, Shannon Jean

    2012-01-01

    Coordination of operations with spatially and temporally shared resources such as route segments, fixes, and runways improves the efficiency of terminal airspace management. Problems in this category include scheduling and routing, thus they are normally difficult to solve compared with pure scheduling problems. In order to reduce the computational time, a fast time algorithm formulation using a non-dominated sorting genetic algorithm (NSGA) was introduced in this work and applied to a test case based on existing literature. The experiment showed that new method can solve the whole problem in fast time instead of solving sub-problems sequentially with a window technique. The results showed a 60% or 406 second delay reduction was achieved by sharing departure fixes (more details on the comparison with MILP results will be presented in the final paper). Furthermore, the NSGA algorithm was applied to a problem in LAX terminal airspace, where interactions between 28% of LAX arrivals and 10% of LAX departures are resolved by spatial segregation, which may introduce unnecessary delays. In this work, spatial segregation, temporal segregation, and hybrid segregation were formulated using the new algorithm. Results showed that spatial and temporal segregation approaches achieved similar delay. Hybrid segregation introduced much less delay than the other two approaches. For a total of 9 interacting departures and arrivals, delay reduction varied from 4 minutes to 6.4 minutes corresponding flight time uncertainty from 0 to 60 seconds. Considering the amount of flights that could be affected, total annual savings with hybrid segregation would be significant.

  9. Infectious diseases in air travellers arriving in the UK.

    PubMed

    Gerard, E

    2002-06-01

    The ease of access to air travel and its increased popularity over the last 30 years have led to a significant incidence of imported infectious diseases and potential infectious hazards. The commonest type of illness found is acute gastroenteritis. Tuberculosis and malaria are not currently common conditions encountered in the UK, but medical vigilance is increasingly necessary as a result of these and other infectious diseases being carried by arriving air travellers. Risks of transmission to other passengers have been considered, and tuberculosis has been shown to have relatively low infectivity on commercial flights. Incidence of serious communicable disease occurring in arriving passengers is low, and should be referred to communicable disease specialists for advice on management. High standards of precautionary hygiene measures are mandatory to commercial aircraft to prevent spread of infectious agents. Disease vectors and products of animal origin pose additional potential threats to public health. Vigilance by environmental health specialists helps maintain national defences against this group of threats. Alertness to recent travel history and awareness of international public health concerns is essential for clinicians likely to encounter sick members of the travelling public. The largest commercial airports have health surveillance units, tasked with acting as a first line of defence against infectious disease. The majority of cases do not present in flight or at the airport, so they can present to any primary care clinician or emergency department. An integrated strategy for health protection will be developed in the UK with the setting up of a Health Protection Agency. PMID:12134773

  10. Developmental delays at arrival and postmenarcheal Chinese adolescents' adjustment.

    PubMed

    Tan, Tony X; Rice, Jessica L; Mahoney, E Emily

    2015-01-01

    Internationally adopted (IA) children often have delays at adoption and undergo massive catch-up after adoption. Before achieving developmental catch-up, however, delays at adoption present a risk for IA children's adjustment, but it remains unknown whether such delays foreshadow IA children's outcomes after catch-up development has completed or ceased. In the current analysis, we utilized menarche as a practical marker to indicate the cessation of developmental catch-up. We investigated how delays at arrival predicted long-term outcomes in 132 postmenarcheal teens (M = 14.2 years, SD = 1.7) who were adopted from China at 16.6 months (SD = 17.1). In 2005, adoptive parents provided data of medical evaluation results on their children's delay status in gross motor skills, fine motor skills, social development, emotional development, and cognitive development. Six years later in 2011, data on parent-child relationship quality were collected from parents, and data on the adoptees' academic competence and internalizing problems were also collected from both parents and adoptees. We found that gross motor delay at arrival predicted academic performance (parent-report: b = -.34, p < .01) and internalizing problems (self-report: b = .26, p < .05; parent-report: b = .33, p < .01). Other delays were not significant in predicting any of the outcomes. The impact of early nutritional deprivation on gross motor development was discussed. PMID:25642657

  11. Air shower arrival directions measured at Buckland Park

    NASA Technical Reports Server (NTRS)

    Gerhardy, P. R.; Prescott, J. R.; Protheroe, R. J.; Clay, R. W.; Patterson, J. R.; Gregory, A. G.

    1985-01-01

    The Buckland Park air shower array was operated for 3 years from 1979 to 1981 particularly for the study of anisotropies in the region of the knee of the size spectrum. The array which has been described in detail elsewhere was situated at a latitude of 35 S and had an effective size threshold of approx 3 x 10 to the 5th power particles (approx 3 x 10 to the 15th power Ev for vertical showers). A number of results from this experiment have already been published including anisotropy analyses (Gerhardy and Clay, 1983) and searches for very high energy gamma ray sources. The final distribution of measured shower arrival directions are presented here. These 1.3 x 10 to the 5th power events were selected as indicated in detail in Gerhardy and Clay (1983) and were essentially those events with well measured arrival directions. They are the same data set used in the above reference but no complete sky map has previously been presented.

  12. Ultra-Wideband Angle-of-Arrival Tracking Systems

    NASA Technical Reports Server (NTRS)

    Arndt, G. Dickey; Ngo, Phong H.; Phan, Chau T.; Gross, Julia; Ni, Jianjun; Dusl, John

    2010-01-01

    Systems that measure the angles of arrival of ultra-wideband (UWB) radio signals and perform triangulation by use of those angles in order to locate the sources of those signals are undergoing development. These systems were originally intended for use in tracking UWB-transmitter-equipped astronauts and mobile robots on the surfaces of remote planets during early stages of exploration, before satellite-based navigation systems become operational. On Earth, these systems could be adapted to such uses as tracking UWB-transmitter-equipped firefighters inside buildings or in outdoor wildfire areas obscured by smoke. The same characteristics that have made UWB radio advantageous for fine resolution ranging, covert communication, and ground-penetrating radar applications in military and law-enforcement settings also contribute to its attractiveness for the present tracking applications. In particular, the waveform shape and the short duration of UWB pulses make it possible to attain the high temporal resolution (of the order of picoseconds) needed to measure angles of arrival with sufficient precision, and the low power spectral density of UWB pulses enables UWB radio communication systems to operate in proximity to other radio communication systems with little or no perceptible mutual interference.

  13. Fast-phase space computation of multiple arrivals

    PubMed Central

    Fomel, S.; Sethian, J. A.

    2002-01-01

    We present a fast, general computational technique for computing the phase-space solution of static Hamilton–Jacobi equations. Starting with the Liouville formulation of the characteristic equations, we derive “Escape Equations” which are static, time-independent Eulerian PDEs. They represent all arrivals to the given boundary from all possible starting configurations. The solution is numerically constructed through a “one-pass” formulation, building on ideas from semi-Lagrangian methods, Dijkstra-like methods for the Eikonal equation, and Ordered Upwind Methods. To compute all possible trajectories corresponding to all possible boundary conditions, the technique is of computational order O(N log N), where N is the total number of points in the computational phase-space domain; any particular set of boundary conditions then is extracted through rapid post-processing. Suggestions are made for speeding up the algorithm in the case when the particular distribution of sources is provided in advance. As an application, we apply the technique to the problem of computing first, multiple, and most energetic arrivals to the Eikonal equation. PMID:12032282

  14. Fast-phase space computation of multiple arrivals.

    PubMed

    Fomel, S; Sethian, J A

    2002-05-28

    We present a fast, general computational technique for computing the phase-space solution of static Hamilton-Jacobi equations. Starting with the Liouville formulation of the characteristic equations, we derive "Escape Equations" which are static, time-independent Eulerian PDEs. They represent all arrivals to the given boundary from all possible starting configurations. The solution is numerically constructed through a "one-pass" formulation, building on ideas from semi-Lagrangian methods, Dijkstra-like methods for the Eikonal equation, and Ordered Upwind Methods. To compute all possible trajectories corresponding to all possible boundary conditions, the technique is of computational order O(N log N), where N is the total number of points in the computational phase-space domain; any particular set of boundary conditions then is extracted through rapid post-processing. Suggestions are made for speeding up the algorithm in the case when the particular distribution of sources is provided in advance. As an application, we apply the technique to the problem of computing first, multiple, and most energetic arrivals to the Eikonal equation. PMID:12032282

  15. Order of arrival structures arbuscular mycorrhizal colonization of plants.

    PubMed

    Werner, Gijsbert D A; Kiers, E Toby

    2015-03-01

    Priority effects - the impact of a species' arrival on subsequent community development - have been shown to influence species composition in many organisms. Whether priority effects among arbuscular mycorrhizal fungi (AMF) structure fungal root communities is not well understood. Here, we investigated whether priority effects influence the success of two closely related AMF species (Rhizophagus irregularis and Glomus aggregatum), hypothesizing that a resident AMF suppresses invader success, this effect is time-dependent and a resident will experience reduced growth when invaded. We performed two glasshouse experiments using modified pots, which permitted direct inoculation of resident and invading AMF on the roots. We quantified intraradical AMF abundances using quantitative PCR and visual colonization percentages. We found that both fungi suppressed the invading species and that this effect was strongly dependent on the time lag between inoculations. In contrast to our expectations, neither resident AMF was negatively affected by invasion. We show that order of arrival can influence the abundance of AMF species colonizing a host. These priority effects can have important implications for AMF ecology and the use of fungal inocula in sustainable agriculture. PMID:25298030

  16. Surface-wave arrival angles across the USArray TA: the influences of path characteristics and an evaluation of current earth models

    NASA Astrophysics Data System (ADS)

    Foster, A. E.; Ekstrom, G.; Hjorleifsdottir, V.

    2011-12-01

    We investigate the variations in surface-wave arrival angle observed on the USArray Transportable Array (TA), using a simple array method to estimate the amount of deviation from the great-circle path. Specifically, the arrival angle is selected using a grid-search method performed over a range of effective source locations, offset from the actual source location by the arrival angle. The effective source that best predicts the single-station phase measurements (Ekström et al., 1997) at all stations within a certain radius of the location of interest corresponds to the estimated arrival angle. We apply the technique to Love and Rayleigh waves from 25-100 s periods, and find arrival angles spanning the allowed range of our study, from -15° to +15°. The resulting data set contains measurements from over 400 events at any given period, and up to 1600 events at some periods. We characterize the arrival angles by selecting subsets using particular criteria, including similar source regions, source-receiver path length, and path type (oceanic versus continental). The largest arrival-angle deviations result from major tectonic boundaries, particularly the ocean-continent transition off of the western US; however, the span of the TA in both time and space allows us to observe smaller changes in arrival angle as energy propagates within the array. This observation is aided by 'composite' images, obtained by compiling arrival angles from closely-spaced earthquakes that are separated in time and recorded by different footprints of the TA. The observations are compared with the results of applying the same techniques to synthetic seismograms calculated using SPECFEM, a 3-D finite element method, and the earth models S362ANI and CRUST 2.0. Although these models are not as heterogeneous as the real earth, arrival angles for certain paths are consistently well-predicted in their pattern and amplitudes. These comparisons provide information on the accuracy of our current

  17. Comparison of broadband mode arrivals at ranges of 3515 km and 5171 km in the North Pacific

    NASA Astrophysics Data System (ADS)

    Wage, Kathleen E.

    2003-04-01

    The Acoustic Thermometry of Ocean Climate (ATOC) provided an opportunity to observe signals propagating in the low-order modes of the ocean waveguide. Understanding the fluctuations of these mode signals is an important prerequisite to using them for tomography or other applications. In previous work, we characterized the cross-mode coherence and temporal variability of the low-order mode arrivals at 3515 km range [Wage et al., J. Acoust. Soc. Am. (in press)]. This study compares the mode arrivals for two different ranges : 3515 km and 5171 km, using data from the ATOC vertical line arrays at Hawaii and Kiritimati. We discuss the mode intensity and coherence statistics for each of the arrays and examine mean arrival time trends over the year-long deployment. Experimental results are compared to PE simulations of propagation through a realistic background environment perturbed by internal waves of varying strengths. The dependence of mode statistics on the path-dependent changes in the background sound speed and the parameters of the internal wave field is explored. [Work supported by an ONR Ocean Acoustics Young Faculty Award.] a)A. B. Baggeroer, T. G. Birdsall, C. Clark, J. A. Colosi, B. D. Cornuelle, D. Costa, B. D. Dushaw, M. A. Dzieciuch, A. M. G. Forbes, B. M. Howe, D. Menemenlis, J. A. Mercer, K. Metzger, W. H. Munk, R. C. Spindel, P. F. Worcester, and C. Wunsch.

  18. Airborne Precision Spacing (APS) Dependent Parallel Arrivals (DPA)

    NASA Technical Reports Server (NTRS)

    Smith, Colin L.

    2012-01-01

    The Airborne Precision Spacing (APS) team at the NASA Langley Research Center (LaRC) has been developing a concept of operations to extend the current APS concept to support dependent approaches to parallel or converging runways along with the required pilot and controller procedures and pilot interfaces. A staggered operations capability for the Airborne Spacing for Terminal Arrival Routes (ASTAR) tool was developed and designated as ASTAR10. ASTAR10 has reached a sufficient level of maturity to be validated and tested through a fast-time simulation. The purpose of the experiment was to identify and resolve any remaining issues in the ASTAR10 algorithm, as well as put the concept of operations through a practical test.

  19. STS-92 crew arrives at KSC for launch

    NASA Technical Reports Server (NTRS)

    2000-01-01

    Still seated in the T-38 jet aircraft that arrived moments before at the Shuttle Landing Facility, STS-92 Mission Specialist Peter J.K. '''Jeff''' Wisoff shows his happiness in being back at KSC for launch. He and other crew members Commander Brian Duffy, Pilot Pamela Ann Melroy and Mission Specialists Koichi Wakata of Japan, Leroy Chiao, Michael E. Lopez-Alegria and William S. McArthur Jr. later talked to a waiting group of media at the Shuttle Landing Facility. The mission is the fifth flight for the construction of the International Space Station. The payload includes the Integrated Truss Structure Z-1 and the third Pressurized Mating Adapter. During the 11-day mission, four extravehicular activities (EVAs), or space walks, are planned.

  20. STS-92 crew arrives at KSC for launch

    NASA Technical Reports Server (NTRS)

    2000-01-01

    Still seated in the T-38 jet aircraft that arrived moments before at the Shuttle Landing Facility, STS-92 Mission Specialist William S. McArthur Jr. shows his happiness in being back at KSC for launch. He and other crew members Commander Brian Duffy, Pilot Pamela Ann Melroy and Mission Specialists Koichi Wakata of Japan, Leroy Chiao, Peter J.K. '''Jeff''' Wisoff and Michael E. Lopez-Alegria later talked to a waiting group of media at the Shuttle Landing Facility. The mission is the fifth flight for the construction of the International Space Station. The payload includes the Integrated Truss Structure Z-1 and the third Pressurized Mating Adapter. During the 11-day mission, four extravehicular activities (EVAs), or space walks, are planned.

  1. Crew Procedures for Continuous Descent Arrivals Using Conventional Guidance

    NASA Technical Reports Server (NTRS)

    Oseguera-Lohr, Rosa M.; Williams, David H.; Lewis, Elliot T,

    2007-01-01

    This paper presents results from a simulation study which investigated the use of Continuous Descent Arrival (CDA) procedures for conducting a descent through a busy terminal area, using conventional transport-category automation. This research was part of the Low Noise Flight Procedures (LNFP) element within the Quiet Aircraft Technology (QAT) Project, that addressed development of flight guidance, and supporting pilot and Air Traffic Control (ATC) procedures for low noise operations. The procedures and chart were designed to be easy to understand, and to make it easy for the crew to make changes via the Flight Management Computer Control-Display Unit (FMC-CDU) to accommodate changes from ATC. The test runs were intended to represent situations typical of what exists in many of today's terminal areas, including interruptions to the descent in the form of clearances issued by ATC.

  2. STS-86 crew members arrive at the SLF for TCDT

    NASA Technical Reports Server (NTRS)

    1997-01-01

    STS-86 crew members pose for a photograph after arrival at KSCs Shuttle Landing Facility for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. From left, are Mission Specialists Vladimir Georgievich Titov of the Russian Space Agency, Wendy B. Lawrence, David A. Wolf and Scott Parazynski; Commander James D. Wetherbee; Pilot Michael J. Bloomfield; and Mission Specialist Jean-Loup J.M. Chretien of the French Space Agency, CNES. STS-86 will be the seventh docking of the Space Shuttle with the Russian Space Station Mir. Wolf will transfer to the Mir for a long-duration stay, replacing Mir 24 crew member C. Michael Foale, who will return to Earth with the rest of the STS- 86 crew. The mission is targeted for a Sept. 25 launch aboard the Space Shuttle Atlantis.

  3. STS-86 crew arrives at the SLF before launch

    NASA Technical Reports Server (NTRS)

    1997-01-01

    STS-86 Commander James D. Wetherbee, with microphone, addresses press representatives and other onlookers after the astronauts arrival Monday at KSCs Shuttle Landing Facility. The other crew members, from left, are Mission Specialist David A. Wolf; Pilot Michael J. Bloomfield; Mission Specialist Jean-Loup J.M. Chretien of the French Space Agency, CNES; Mission Specialist Scott E. Parazynksi; Mission Specialist Vladimir Georgievich Titov of the Russian Space Agency; and Mission Specialist Wendy B. Lawrence. STS-86 is slated to be the seventh docking of the Space Shuttle with the Russian Space Station Mir. After the docking, Wolf is scheduled to transfer to the Mir 24 crew, replacing astronaut C. Michael Foale. Wolf is scheduled to remain on the Mir for about four months. Liftoff of STS-86 aboard Atlantis is targeted for Sept. 25.

  4. P-1 truss arrives at O&C Building

    NASA Technical Reports Server (NTRS)

    2000-01-01

    The P-1 truss, a component of the International Space Station, arrives in the parking lot outside the Operations and Checkout Building where it will undergo processing. The P-1 truss, scheduled to fly in spring of 2002, is part of a total 10-truss, girder-like structure on the Space Station that will ultimately extend the length of a football field. Astronauts will attach the 14-by-15 foot structure to the port side of the center truss, S0, during the spring assembly flight. The 33,000-pound P-1 will house the thermal radiator rotating joint (TRRJ) that will rotate the Station's radiators away from the sun to increase their maximum cooling efficiency.

  5. STS-112 crew arrives at KSC's SLF for launch

    NASA Technical Reports Server (NTRS)

    2002-01-01

    KENNEDY SPACE CENTER, FLA. -- After their arrival at the KSC Shuttle Landing Facility, the STS-112 crew members stride happily to the side of the parking apron and a photo opportunity. From left are Commander Jeffrey Ashby, Mission Specialist Piers Sellers, Pilot Pamela Melroy and Mission Specialists David Wolf, Sandra Magnus and Fyodor Yurchikhin, who is with the Russian Space Agency. Launch is scheduled for Oct. 2 between 2 and 6 p.m. STS-112, aboard Space Shuttle Atlantis, is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts. The 11-day mission includes three spacewalks.

  6. STS-112 crew after arrival at SLF for launch

    NASA Technical Reports Server (NTRS)

    2002-01-01

    KENNEDY SPACE CENTER, FLA. -- The STS-112 crew pauses for a photo after their arrival at the KSC Shuttle Landing Facility. Standing, left to right, are Mission Specialist Piers Sellers, Pilot Pamela Melroy, Commander Jeffrey Ashby, and Mission Specialists David Wolf, Sandra Magnus and cosmonaut Fyodor Yurchikhin. Sellers, Magnus and Yurchikhin are making their first Shuttle flights. STS-112, aboard Space Shuttle Atlantis, is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts. The 11-day mission includes three spacewalks. Launch is scheduled for Oct. 2 between 2 and 6 p.m.

  7. An Airbus arrives at KSC with third MPLM

    NASA Technical Reports Server (NTRS)

    2001-01-01

    An Airbus '''Beluga''' air cargo plane, The Super Transporter, arrives at KSC's Shuttle Landing Facility from the factory of Alenia Aerospazio in Turin, Italy. Its cargo is the Italian Space Agency's Multi-Purpose Logistics Module Donatello, the third of three for the International Space Station. The module will be transported to the Space Station Processing Facility for processing. Among the activities for the payload test team are integrated electrical tests with other Station elements in the SSPF, leak tests, electrical and software compatibility tests with the Space Shuttle (using the Cargo Integrated Test equipment) and an Interface Verification Test once the module is installed in the Space Shuttle's payload bay at the launch pad. The most significant mechanical task to be performed on Donatello in the SSPF is the installation and outfitting of the racks for carrying the various experiments and cargo.

  8. STS-99 Mission Specialist Thiele arrives for launch

    NASA Technical Reports Server (NTRS)

    2000-01-01

    STS-99 Mission Specialist Gerhard P.J. Thiele (Ph.D.), with the European Space Agency, arrives at KSC aboard a T-38 jet aircraft to prepare for launch of Endeavour Jan. 31 at 12:47 p.m. EST. Over the next few days, the crew will review mission procedures, conduct test flights in the Shuttle Training Aircraft and undergo routine preflight medical exams. STS-99 is the Shuttle Radar Topography Mission, which will chart a new course, using two antennae and a 200-foot-long section of space station-derived mast protruding from the payload bay to produce unrivaled 3-D images of the Earth's surface. The result of the Shuttle Radar Topography Mission could be close to 1 trillion measurements of the Earth's topography. Besides contributing to the production of better maps, these measurements could lead to improved water drainage modeling, more realistic flight simulators, better locations for cell phone towers, and enhanced navigation safety.

  9. STS-99 Pilot Gorie arrives at KSC for launch

    NASA Technical Reports Server (NTRS)

    2000-01-01

    A smiling STS-99 Mission Specialist Mamoru Mohri of Japan arrives at KSC aboard a T-38 jet aircraft eager to prepare for the second launch attempt of Endeavour Feb. 11 at 12:30 p.m. EST from Launch Pad 39A. The earlier launch scheduled for Jan. 31 was scrubbed due to poor weather and a faulty Enhanced Master Events Controller in the orbiter's aft compartment. Over the next few days, the crew will review mission procedures, conduct test flights in the Shuttle Training Aircraft and undergo routine preflight medical exams. STS-99 is the Shuttle Radar Topography Mission, which will produce unrivaled 3-D images of the Earth's surface. The result of the Shuttle Radar Topography Mission could be close to 1 trillion measurements of the Earth's topography. Landing is expected at KSC on Feb. 22 at 4:36 p.m. EST.

  10. Angle-of-Arrival Assisted GNSS Collaborative Positioning

    PubMed Central

    Huang, Bin; Yao, Zheng; Cui, Xiaowei; Lu, Mingquan

    2016-01-01

    For outdoor and global navigation satellite system (GNSS) challenged scenarios, collaborative positioning algorithms are proposed to fuse information from GNSS satellites and terrestrial wireless systems. This paper derives the Cramer-Rao lower bound (CRLB) and algorithms for the angle-of-arrival (AOA)-assisted GNSS collaborative positioning. Based on the CRLB model and collaborative positioning algorithms, theoretical analysis are performed to specify the effects of various factors on the accuracy of collaborative positioning, including the number of users, their distribution and AOA measurements accuracy. Besides, the influences of the relative location of the collaborative users are also discussed in order to choose appropriate neighboring users, which is in favor of reducing computational complexity. Simulations and actual experiment are carried out with several GNSS receivers in different scenarios, and the results are consistent with theoretical analysis. PMID:27331816

  11. Boeing Delta II rocket for FUSE launch arrives at CCAS

    NASA Technical Reports Server (NTRS)

    1999-01-01

    After its arrival at Launch Pad 17A, Cape Canaveral Air Station (CCAS), the first stage of a Boeing Delta II rocket is raised to a vertical position. The rocket is targeted to launch NASA's Far Ultraviolet Spectroscopic Explorer (FUSE), developed by The Johns Hopkins University under contract to Goddard Space Flight Center, Greenbelt, Md. FUSE will investigate the origin and evolution of the lightest elements in the universe, hydrogen and deuterium. In addition, the FUSE satellite will examine the forces and process involved in the evolution of the galaxies, stars and planetary systems by investigating light in the far ultraviolet portion of the electromagnetic spectrum. FUSE is scheduled to be launched June 23 at CCAS.

  12. STS-113 Mission Specialist Lopez-Alegris arrives for TCDT

    NASA Technical Reports Server (NTRS)

    2002-01-01

    KENNEDY SPACE CENTER, FLA. -- STS-113 Mission Specialist Michael Lopez-Alegria arrives at KSC for Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. The primary payloads on mission STS-113 are the first port truss segment, P1, and the Crew and Equipment Translation Aid (CETA) Cart B. Once delivered, the P1 truss will remain stowed until flight 12A.1 in 2003 when it will be attached to the central truss segment, S0, on the Space Station. Also onboard Space Shuttle Endeavour will be the Expedition 6 crew who will replace Expedition 5, returning to Earth after 4 months. The STS-113 launch is scheduled for Nov. 10, 2002.

  13. Angle-of-Arrival Assisted GNSS Collaborative Positioning.

    PubMed

    Huang, Bin; Yao, Zheng; Cui, Xiaowei; Lu, Mingquan

    2016-01-01

    For outdoor and global navigation satellite system (GNSS) challenged scenarios, collaborative positioning algorithms are proposed to fuse information from GNSS satellites and terrestrial wireless systems. This paper derives the Cramer-Rao lower bound (CRLB) and algorithms for the angle-of-arrival (AOA)-assisted GNSS collaborative positioning. Based on the CRLB model and collaborative positioning algorithms, theoretical analysis are performed to specify the effects of various factors on the accuracy of collaborative positioning, including the number of users, their distribution and AOA measurements accuracy. Besides, the influences of the relative location of the collaborative users are also discussed in order to choose appropriate neighboring users, which is in favor of reducing computational complexity. Simulations and actual experiment are carried out with several GNSS receivers in different scenarios, and the results are consistent with theoretical analysis. PMID:27331816

  14. STS-103 Commander Brown arrives at KSC for launch

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Commander Curtis L. Brown Jr. smiles on his arrival at the Shuttle Landing Facility aboard a T-38 jet aircraft. He joins other crew members Pilot Scott J. Kelly and Mission Specialists Steven L. Smith, C. Michael Foale (Ph.D.), John M. Grunsfeld (Ph.D.), Claude Nicollier of Switzerland and Jean-Frangois Clervoy of France, for pre-launch preparations on mission STS-103 aboard Space Shuttle Discovery. Nicollier and Clervoy are with the European Space Agency. The mission, to service the Hubble Space Telescope, is scheduled for launch Dec. 11 at 12:13 a.m. EST from Launch Pad 39B. Discovery is expected to land at KSC Monday, Dec. 20, at 9:21 p.m. EST.

  15. STS-87 Crew arrives at KSC for TCDT

    NASA Technical Reports Server (NTRS)

    1997-01-01

    Mission Commander Kevin Kregel, who will lead the crew of one other veteran space flyer and four rookies on mission STS-87 aboard the Shuttle Columbia, looks on as Mission Specialist Takao Doi, Ph.D., of the National Space Development Agency (NASDA) of Japan addresses a group at Kennedy Space Centers (KSCs) Shuttle Landing Facility. During the STS-87 mission, scheduled for launch on Nov. 19, Dr. Doi will become the first Japanese astronaut to conduct a spacewalk. The crew arrived at KSC on Nov. 3 to conduct the Terminal Countdown Demonstration Test (TCDT), held at KSC prior to each Space Shuttle flight to provide the crew with opportunities to participate in simulated countdown activities.

  16. STS-87 Crew arrives at KSC for TCDT

    NASA Technical Reports Server (NTRS)

    1997-01-01

    Kennedy Space Center (KSC) Director Roy Bridges, at far left, shakes the hand of Mission Specialist Takao Doi, Ph.D., of the National Space Development Agency (NASDA) of Japan. During the STS-87 mission, scheduled for launch on Nov. 19, Dr. Doi will become the first Japanese astronaut to conduct a spacewalk. Pointing to Dr. Doi is Mission Commander Kevin Kregel, who will lead the crew of one other veteran space flyer and four rookies on mission STS-87 aboard the Shuttle Columbia. Kregel is a veteran of two space flights (STS-70 and -78). Next to Kregel is Payload Specialist Leonid Kadenyuk of the National Space Agency of Ukraine. The crew arrived at KSC on Nov. 3 to conduct the Terminal Countdown Demonstration Test (TCDT), held at KSC prior to each Space Shuttle flight to provide the crew with opportunities to participate in simulated countdown activities.

  17. Using coprime microphone arrays for direction-of-arrival estimation

    NASA Astrophysics Data System (ADS)

    Nichols, John Paul

    Direction-of-arrival estimation using microphone arrays requires many sensors to reduce beam width in order to achieve precise location estimation in a noisy environment. Coprime linear microphone arrays allow for narrow beams with fewer sensors. Coprime sensing is a type of sparse sensing, meaning that the microphone elements are fewer and more spaced out than in a traditional array without sacrificing resolution, but requiring more post-processing. A coprime microphone array is made up of two overlapping uniform linear arrays with M and N sensors, where M and N are coprime. By applying spatial filtering with both arrays and combining their outputs, M+N sensors can yield MN directional bands. In this work, the coprime array theory is implemented experimentally for the first time with a microphone array to estimate the location of multiple uncorrelated sources in a noisy environment. Both simulated and measured results will be discussed.

  18. STS-93 crew leaves SLF after arrival for launch

    NASA Technical Reports Server (NTRS)

    1999-01-01

    The STS-93 crew leave the Shuttle Landing Facility after answering questions for the media and posing for photographers, whose shadows stretch across the SLF. From left are Mission Specialists Michel Tognini of France, who is with the Centre National d'Etudes Spatiales (CNES) and Steven A. Hawley (Ph.D.), Commander Eileen M. Collins (waving), Mission Specialist Catherine G. 'Cady' Coleman (Ph.D.), and Pilot Jeffrey S. Ashby. The crew arrived at KSC for pre-launch activities. Collins is the first woman to serve as mission commander. The primary mission of STS-93 is the release of the Chandra X-ray Observatory, which will allow scientists from around the world to study some of the most distant, powerful and dynamic objects in the universe. The new telescope is 20 to 50 times more sensitive than any previous X-ray telescope and is expected to unlock the secrets of supernovae, quasars and black holes.

  19. STS-78 Crew and alternates arrive at the SLF

    NASA Technical Reports Server (NTRS)

    1996-01-01

    KENNEDY SPACE CENTER, FL. -- STS-78 Mission Commander Terence T. 'Tom' Henricks (third from left) displays an Olympic torch that was presented to the flight crew and their alternates after they arrived at KSC's Shuttle Landing Facility. With Henricks are (from left) Payload Specialist Jean-Jacques Favier (French Space Agency); Alternate Payload Specialist Luca Urbani (Italian Space Agency); Henricks; Mission Specialist Charles E. Brady Jr.; Payload Commander Susan J. Helms; Pilot Kevin R. Kregel; Mission Specialist Richard M. Linnehan; Alternate Payload Specialist Pedro Duque (European Space Agency); and Payload Specialist Robert Brenton Thirsk (Canadian Space Agency). The crew will take the torch with them on their upcoming spaceflight and then present it upon their return to a representative of the Atlanta Committee for the Olympic games (ACOG). The countdown clock began ticking earlier today toward the June 20 launch of the Space Shuttle Columbia on Mission STS-78, the fifth Shuttle flight of 1996.

  20. The U.S. Laboratory module arrives at KSC

    NASA Technical Reports Server (NTRS)

    1998-01-01

    NASA's 'Super Guppy' aircraft arrives in KSC air space escorted by two T-38 aircraft after leaving Marshall Space Flight Center in Huntsville, Ala. The whale-like airplane carries the U.S. Laboratory module, considered the centerpiece of the International Space Station. The module will undergo final pre- launch preparations at KSC's Space Station Processing Facility. Scheduled for launch aboard the Shuttle Endeavour on mission STS- 98, the laboratory comprises three cylindrical sections with two end cones. Each end-cone contains a hatch opening for entering and exiting the lab. The lab will provide a shirtsleeve environment for research in such areas as life science, microgravity science, Earth science and space science. Designated Flight 5A, this mission is targeted for launch in early 2000.

  1. Optimal Integration of Departures and Arrivals in Terminal Airspace

    NASA Technical Reports Server (NTRS)

    Xue, Min; Zelinski, Shannon Jean

    2013-01-01

    Coordination of operations with spatially and temporally shared resources, such as route segments, fixes, and runways, improves the efficiency of terminal airspace management. Problems in this category are, in general, computationally difficult compared to conventional scheduling problems. This paper presents a fast time algorithm formulation using a non-dominated sorting genetic algorithm (NSGA). It was first applied to a test problem introduced in existing literature. An experiment with a test problem showed that new methods can solve the 20 aircraft problem in fast time with a 65% or 440 second delay reduction using shared departure fixes. In order to test its application in a more realistic and complicated problem, the NSGA algorithm was applied to a problem in LAX terminal airspace, where interactions between 28% of LAX arrivals and 10% of LAX departures are resolved by spatial separation in current operations, which may introduce unnecessary delays. In this work, three types of separations - spatial, temporal, and hybrid separations - were formulated using the new algorithm. The hybrid separation combines both temporal and spatial separations. Results showed that although temporal separation achieved less delay than spatial separation with a small uncertainty buffer, spatial separation outperformed temporal separation when the uncertainty buffer was increased. Hybrid separation introduced much less delay than both spatial and temporal approaches. For a total of 15 interacting departures and arrivals, when compared to spatial separation, the delay reduction of hybrid separation varied between 11% or 3.1 minutes and 64% or 10.7 minutes corresponding to an uncertainty buffer from 0 to 60 seconds. Furthermore, as a comparison with the NSGA algorithm, a First-Come-First-Serve based heuristic method was implemented for the hybrid separation. Experiments showed that the results from the NSGA algorithm have 9% to 42% less delay than the heuristic method with varied

  2. Laser arrival measurement tools for SwissFEL

    NASA Astrophysics Data System (ADS)

    Csatari Divall, Marta; Romann, Albert; Mutter, Patrick; Hunziker, Stephan; Hauri, Christoph P.

    2015-05-01

    SwissFEL is aiming to produce X-ray pulses from 30 fs down to the attosecond time scale. This requires the compression of the several picosecond long electron bunches produced by a photo-injector to sub-fs level. To achieve this, 40fs accurate injection of the electron bunches into the main linear accelerator is necessary. Therefore high timing accuracy is required from the drive laser of the electron gun. Furthermore fs scan capability is foreseen for the experimental stations of the FEL. The ultra-short pulse pump-probe lasers therefore need to exhibit outstanding, below 10fs short term jitter relative to the X-rays. Timing tools for both the electron gun laser and for the experiments are developed. The former is based on electro-optical modulation of the optical reference at 1560nm by a signal produced from the gun laser at 260nm, a concept similar to beam arrival monitors in the linear accelerator, with an expected resolution below 20fs. The latter will use spectrally resolved cross-correlation technique to determine relative jitter between the optical reference and the laser used at the experiments at 800nm, with fs resolution. These systems will be complemented by electron and X-ray timing tools. In this paper we present the general concept for the laser arrival time measurement and correction, with first results obtained on a Ti:sapphire chirped pulse amplifier system. Shot to shot, short term jitter and long term timing drift measurements are presented, with discussion on the sources of the noise. Plans for the feedback stabilization and the resolution and limitation of the systems are also covered.

  3. ALS - resources

    MedlinePlus

    Resources - ALS ... The following organizations are good resources for information on amyotrophic lateral sclerosis : Muscular Dystrophy Association -- mda.org/disease/amyotrophic-lateral-sclerosis National Amyotrophic Lateral Sclerosis (ALS) Registry -- ...

  4. ALS Association

    MedlinePlus

    ... ALS. Find Out How Our Mission Leading the fight to treat and cure ALS through global research ... you participate, advocate, and donate, you advance the fight to find the cure and lead us toward ...

  5. A Fast-Time Simulation Tool for Analysis of Airport Arrival Traffic

    NASA Technical Reports Server (NTRS)

    Erzberger, Heinz; Meyn, Larry A.; Neuman, Frank

    2004-01-01

    The basic objective of arrival sequencing in air traffic control automation is to match traffic demand and airport capacity while minimizing delays. The performance of an automated arrival scheduling system, such as the Traffic Management Advisor developed by NASA for the FAA, can be studied by a fast-time simulation that does not involve running expensive and time-consuming real-time simulations. The fast-time simulation models runway configurations, the characteristics of arrival traffic, deviations from predicted arrival times, as well as the arrival sequencing and scheduling algorithm. This report reviews the development of the fast-time simulation method used originally by NASA in the design of the sequencing and scheduling algorithm for the Traffic Management Advisor. The utility of this method of simulation is demonstrated by examining the effect on delays of altering arrival schedules at a hub airport.

  6. Testing for uniformity of ultra-high energy cosmic ray arrival directions

    NASA Astrophysics Data System (ADS)

    Ivanov, A. A.

    2016-04-01

    Arrival directions of ultra-high energy cosmic rays (UHECRs) exhibit mainly an isotropic distribution with some small deviations in particular energy bins. In this paper, the Yakutsk array data are tested for circular uniformity of arrival directions in right ascension (RA) using two methods appropriate for the energy ranges below and above 1018 eV. No statistically significant deviation from uniformity is found in the arrival directions of cosmic rays (CRs) detected within the observation period 1974-2000.

  7. A COMPARISON OF COLLAPSING AND PRECISE ARRIVAL-TIME MAPPING OF MICROSEISMICITY

    SciTech Connect

    RUTLEDGE, JAMES T.; JONES, ROB H.

    2007-01-05

    In this paper they compare the improvements in microseismic location images obtained using precise arrival times with that obtained by the collapsing technique. They first collapse the initial locations for a hydraulic-fracture data set from the Carthage Cotton Valley gas field, they then use the precise-arrival-time locations as measure for the effectiveness of the collapsing. Finally, they examine the changes when applying collapsing to the precise-arrival-time locations.

  8. The calculation of mean first arrival time for double mutants, crossing the fitness valley

    NASA Astrophysics Data System (ADS)

    Saakian, David B.

    2015-05-01

    We calculated the mean first arrival time of the new double mutant in the Wright-Fisher and Moran models with selection where N is the population size, the mutation probability scales as 1/N and selection coefficient as 1/\\sqrt{N} . We mapped the mean first arrival time problem into Kummer equation. Our results have a O(1/\\sqrt{N}) relative accuracy. Our analytic result is rather universal, it describes the mean first arrival time in these models.

  9. STS-96 Commander Rominger arrives at KSC for launch

    NASA Technical Reports Server (NTRS)

    1999-01-01

    STS-96 Commander Kent V. Rominger smiles on his arrival at Kennedy Space Center's Shuttle Landing Facility (SLF) aboard a T- 38 jet aircraft. He joins other crew members Pilot Rick D. Husband and Mission Specialists Ellen Ochoa, Tamara E. Jernigan, Daniel T. Barry, Julie Payette and Valery Ivanovich Tokarev for launch preparations prior to liftoff. Payette represents the Canadian Space Agency and Tokarev represents the Russian Space Agency. STS-96 is a 10-day logistics and resupply mission for the International Space Station, carrying 5000 pounds of supplies to be stored aboard the station for use by future crews, including laptop computers, cameras, tools, spare parts, and clothing. The mission also includes such payloads as a Russian crane, the Strela; a U.S.-built crane; the Spacehab Oceaneering Space System Box (SHOSS), a logistics items carrier; and STARSHINE, a student- involved experiment. The mission will include a space walk to attach the cranes to the outside of the ISS for use in future construction. Space Shuttle Discovery is due to launch on May 27 at 6:48 a.m. EDT. Landing is expected at the SLF on June 6 about 3:25 a.m. EDT.

  10. STS-96 Pilot Husband arrives at KSC for launch

    NASA Technical Reports Server (NTRS)

    1999-01-01

    STS-96 Pilot Rick D. Husband waves on his arrival at Kennedy Space Center's Shuttle Landing Facility (SLF) aboard a T-38 jet aircraft. He joins other crew members Commander Kent V. Rominger and Mission Specialists Ellen Ochoa, Tamara E. Jernigan, Daniel T. Barry, Julie Payette and Valery Ivanovich Tokarev for launch preparations prior to liftoff. Payette represents the Canadian Space Agency and Tokarev represents the Russian Space Agency. STS-96 is a 10-day logistics and resupply mission for the International Space Station, carrying 5000 pounds of supplies to be stored aboard the station for use by future crews, including laptop computers, cameras, tools, spare parts, and clothing. The mission also includes such payloads as a Russian crane, the Strela; a U.S.-built crane; the Spacehab Oceaneering Space System Box (SHOSS), a logistics items carrier; and STARSHINE, a student- involved experiment. The mission will include aspace walk to attach the cranes to the outside of the ISS for use in future construction. Space Shuttle Discovery is due to launch on May 27 at 6:48 a.m. EDT. Landing is expected at the SLF on June 6 about 3:25 a.m. EDT.

  11. STS-96 Mission Specialist Jernigan arrives at KSC for launch

    NASA Technical Reports Server (NTRS)

    1999-01-01

    STS-96 Mission Specialist Tamara E. Jernigan smiles in excitement on her arrival at Kennedy Space Center's Shuttle Landing Facility (SLF) aboard a T-38 jet aircraft. She joins other crew members Commander Kent V. Rominger, Pilot Rick D. Husband, and Mission Specialists Ellen Ochoa, Daniel T. Barry, Julie Payette and Valery Ivanovich Tokarev for launch preparations prior to liftoff. Payette represents the Canadian Space Agency and Tokarev represents the Russian Space Agency. STS-96 is a 10-day logistics and resupply mission for the International Space Station, carrying 5000 pounds of supplies to be stored aboard the station for use by future crews, including laptop computers, cameras, tools, spare parts, and clothing. The mission also includes such payloads as a Russian crane, the Strela; a U.S.-built crane; the Spacehab Oceaneering Space System Box (SHOSS), a logistics items carrier; and STARSHINE, a student-involved experiment. The mission will include a space walk to attach the cranes to the outside of the ISS for use in future construction. Space Shuttle Discovery is due to launch on May 27 at 6:48 a.m. EDT. Landing is expected at the SLF on June 6 about 3:25 a.m. EDT.

  12. STS-112 crew arrives at KSC's SLF for launch

    NASA Technical Reports Server (NTRS)

    2002-01-01

    KENNEDY SPACE CENTER, FLA. -- STS-112 crew members share a few words after their arrival at the KSC Shuttle Landing Facility to begin launch preparations. In the center are Commander Jeffrey Ashby (left) and Mission Specialist David Wolf (right). With their backs to the camera are Mission Specialists Piers Sellers (far left) and Sandra Magnus (far right). Not shown are Pilot Pamela Melroy and Mission Specialist Fyodor Yurchikhin, who is with the Russian Space Agency. STS-112, aboard Space Shuttle Atlantis, is the 15th assembly mission to the International Space Station. Atlantis will be carrying the S1 Integrated Truss Structure, the first starboard truss segment, to be attached to the central truss segment, S0, and the Crew and Equipment Translation Aid (CETA) Cart A. The CETA is the first of two human-powered carts that will ride along the ISS railway, providing mobile work platforms for future spacewalking astronauts. The 11-day mission includes three spacewalks. Launch is scheduled for Oct. 2 between 2 and 6 p.m.

  13. Estimating gas kick arrival to better manage surface flow

    SciTech Connect

    Merryman, J.

    1997-06-01

    There are many quality, expertly designed programs for teaching rig crews prevention and control of well kicks. Much time and money has been spent training rig crews for procedures and methods to avoid kicks, and what to do if you have one, even though all accepted practices were followed. One false/bad result from this training is that individuals have come away from this training believing that once a gas kick is circulated through the choke, all problems are simple and manageable, i.e., the danger has passed. What you do with gas once it is downstream of the choke has not been given enough emphasis in some training programs, including the one the author is involved in. This article, prepared from experiences on actual rig locations in Wyoming and Argentina, and developed for well control training in Parker Drilling Co.`s Training Center, Odessa, Texas, describes a method for estimating the time, in pump strokes and/or minutes, for a gas kick to reach surface. Reducing pump strokes (circulating flowrate) and knowing available time to gas kick arrival allows the crew to prepare surface handling equipment. Common misconceptions about gas handling and potential resulting problems are noted. An example calculation describes the calculation procedure.

  14. STS-99 Mission Specialist Mohri arrives for launch

    NASA Technical Reports Server (NTRS)

    2000-01-01

    STS-99 Mission Specialist Mamoru Mohri (Ph.D.), who is with the National Space Development Agency (NASDA) of Japan, waves on his arrival at KSC aboard a T-38 jet aircraft to prepare for launch of Endeavour Jan. 31 at 12:47 p.m. EST. Over the next few days, the crew will review mission procedures, conduct test flights in the Shuttle Training Aircraft and undergo routine preflight medical exams. STS-99 is the Shuttle Radar Topography Mission, which will chart a new course, using two antennae and a 200-foot- long section of space station-derived mast protruding from the payload bay to produce unrivaled 3-D images of the Earth's surface. The result of the Shuttle Radar Topography Mission could be close to 1 trillion measurements of the Earth's topography. Besides contributing to the production of better maps, these measurements could lead to improved water drainage modeling, more realistic flight simulators, better locations for cell phone towers, and enhanced navigation safety.

  15. Pleistocene megafaunal interaction networks became more vulnerable after human arrival.

    PubMed

    Pires, Mathias M; Koch, Paul L; Fariña, Richard A; de Aguiar, Marcus A M; dos Reis, Sérgio F; Guimarães, Paulo R

    2015-09-01

    The end of the Pleistocene was marked by the extinction of almost all large land mammals worldwide except in Africa. Although the debate on Pleistocene extinctions has focused on the roles of climate change and humans, the impact of perturbations depends on properties of ecological communities, such as species composition and the organization of ecological interactions. Here, we combined palaeoecological and ecological data, food-web models and community stability analysis to investigate if differences between Pleistocene and modern mammalian assemblages help us understand why the megafauna died out in the Americas while persisting in Africa. We show Pleistocene and modern assemblages share similar network topology, but differences in richness and body size distributions made Pleistocene communities significantly more vulnerable to the effects of human arrival. The structural changes promoted by humans in Pleistocene networks would have increased the likelihood of unstable dynamics, which may favour extinction cascades in communities facing extrinsic perturbations. Our findings suggest that the basic aspects of the organization of ecological communities may have played an important role in major extinction events in the past. Knowledge of community-level properties and their consequences to dynamics may be critical to understand past and future extinctions. PMID:26336175

  16. Testing the Empirical Shock Arrival Model Using Quadrature Observations

    NASA Technical Reports Server (NTRS)

    Gopalswamy, N.; Makela, P.; Xie, H.; Yashiro, S.

    2013-01-01

    The empirical shock arrival (ESA) model was developed based on quadrature data from Helios (in situ) and P-78 (remote sensing) to predict the Sun-Earth travel time of coronal mass ejections (CMEs). The ESA model requires earthward CME speed as input, which is not directly measurable from coronagraphs along the Sun-Earth line. The Solar Terrestrial Relations Observatory (STEREO) and the Solar and Heliospheric Observatory (SOHO) were in quadrature during 20102012, so the speeds of Earth-directed CMEs were observed with minimal projection effects. We identified a set of 20 full halo CMEs in the field of view of SOHO that were also observed in quadrature by STEREO. We used the earthward speed from STEREO measurements as input to the ESA model and compared the resulting travel times with the observed ones from L1 monitors. We find that the model predicts the CME travel time within about 7.3 h, which is similar to the predictions by the ENLIL model. We also find that CME-CME and CME-coronal hole interaction can lead to large deviations from model predictions.

  17. Pleistocene megafaunal interaction networks became more vulnerable after human arrival

    PubMed Central

    Pires, Mathias M.; Koch, Paul L.; Fariña, Richard A.; de Aguiar, Marcus A. M.; dos Reis, Sérgio F.; Guimarães, Paulo R.

    2015-01-01

    The end of the Pleistocene was marked by the extinction of almost all large land mammals worldwide except in Africa. Although the debate on Pleistocene extinctions has focused on the roles of climate change and humans, the impact of perturbations depends on properties of ecological communities, such as species composition and the organization of ecological interactions. Here, we combined palaeoecological and ecological data, food-web models and community stability analysis to investigate if differences between Pleistocene and modern mammalian assemblages help us understand why the megafauna died out in the Americas while persisting in Africa. We show Pleistocene and modern assemblages share similar network topology, but differences in richness and body size distributions made Pleistocene communities significantly more vulnerable to the effects of human arrival. The structural changes promoted by humans in Pleistocene networks would have increased the likelihood of unstable dynamics, which may favour extinction cascades in communities facing extrinsic perturbations. Our findings suggest that the basic aspects of the organization of ecological communities may have played an important role in major extinction events in the past. Knowledge of community-level properties and their consequences to dynamics may be critical to understand past and future extinctions. PMID:26336175

  18. Integrated Arrival and Departure Schedule Optimization Under Uncertainty

    NASA Technical Reports Server (NTRS)

    Xue, Min; Zelinski, Shannon

    2014-01-01

    In terminal airspace, integrating arrivals and departures with shared waypoints provides the potential of improving operational efficiency by allowing direct routes when possible. Incorporating stochastic evaluation as a post-analysis process of deterministic optimization, and imposing a safety buffer in deterministic optimization, are two ways to learn and alleviate the impact of uncertainty and to avoid unexpected outcomes. This work presents a third and direct way to take uncertainty into consideration during the optimization. The impact of uncertainty was incorporated into cost evaluations when searching for the optimal solutions. The controller intervention count was computed using a heuristic model and served as another stochastic cost besides total delay. Costs under uncertainty were evaluated using Monte Carlo simulations. The Pareto fronts that contain a set of solutions were identified and the trade-off between delays and controller intervention count was shown. Solutions that shared similar delays but had different intervention counts were investigated. The results showed that optimization under uncertainty could identify compromise solutions on Pareto fonts, which is better than deterministic optimization with extra safety buffers. It helps decision-makers reduce controller intervention while achieving low delays.

  19. Human Factors Considerations for Area Navigation Departure and Arrival Procedures

    NASA Technical Reports Server (NTRS)

    Barhydt, Richard; Adams, Catherine A.

    2006-01-01

    Area navigation (RNAV) procedures are being implemented in the United States and around the world as part of a transition to a performance-based navigation system. These procedures are providing significant benefits and have also caused some human factors issues to emerge. Under sponsorship from the Federal Aviation Administration (FAA), the National Aeronautics and Space Administration (NASA) has undertaken a project to document RNAV-related human factors issues and propose areas for further consideration. The component focusing on RNAV Departure and Arrival Procedures involved discussions with expert users, a literature review, and a focused review of the NASA Aviation Safety Reporting System (ASRS) database. Issues were found to include aspects of air traffic control and airline procedures, aircraft systems, and procedure design. Major findings suggest the need for specific instrument procedure design guidelines that consider the effects of human performance. Ongoing industry and government activities to address air-ground communication terminology, design improvements, and chart-database commonality are strongly encouraged. A review of factors contributing to RNAV in-service errors would likely lead to improved system design and operational performance.

  20. Estimation of angle of arrival for wideband and coherent signals

    NASA Astrophysics Data System (ADS)

    Miyoshi, Akito; Kobayashi, Hirokazu

    1997-06-01

    For angle of arrival (AOA), angle resolution and classification of coherent and non-coherent wideband signals will be major problems, especially under the electronic warfare environment. Several methods have been considered for the estimation of the AOA. Multiple signal classification (MUSIC) is one of new suitable methods. But, the method has a disadvantage that it is impossible to estimate the AOA, if the inputs include coherent signal sources such as multipath. In this paper, the array antenna is constructed by some sub-array antennas. The elements of a sub-array antenna are arranged with non-equispace for the classification of noncoherent signals over wideband and some sub-array antennas are also arranged at non-equal distances for the rejection of the angle ambiguity of coherent signals. We applied MUSIC with a spatial smoothing to the array antenna and study how to reject the ambiguity and how to reduce the sidelobe level by using computer simulations. We also make experiments in anechoic chamber to confirm the simulation results. We then indicate that the spatial smoothing of sub-arrays with non-equispace removes the ambiguity of AOA and the classification of coherent signals and noncoherent signals over 8-18GHz is possible.

  1. Transition from discrete to continuous time-of-arrival distribution for a quantum particle

    SciTech Connect

    Galapon, Eric A.; Delgado, F.; Muga, J. Gonzalo; Egusquiza, Inigo

    2005-10-15

    We show that the Kijowski distribution for time of arrivals in the entire real line is the limiting distribution of the time-of-arrival distribution in a confining box as its length increases to infinity. The dynamics of the confined time-of-arrival eigenfunctions is also numerically investigated and demonstrated that the eigenfunctions evolve to have point supports at the arrival point at their respective eigenvalues in the limit of arbitrarily large confining lengths, giving insight into the ideal physical content of the Kijowsky distribution.

  2. 19 CFR 122.22 - Electronic manifest requirement for all individuals onboard private aircraft arriving in and...

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... individuals onboard private aircraft arriving in and departing from the United States; notice of arrival and... Electronic manifest requirement for all individuals onboard private aircraft arriving in and departing from...) Electronic manifest requirement for all individuals onboard private aircraft arriving in the U.S.; notice...

  3. 19 CFR 122.22 - Electronic manifest requirement for all individuals onboard private aircraft arriving in and...

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... individuals onboard private aircraft arriving in and departing from the United States; notice of arrival and... Electronic manifest requirement for all individuals onboard private aircraft arriving in and departing from...) Electronic manifest requirement for all individuals onboard private aircraft arriving in the U.S.; notice...

  4. 19 CFR 122.22 - Electronic manifest requirement for all individuals onboard private aircraft arriving in and...

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... individuals onboard private aircraft arriving in and departing from the United States; notice of arrival and... Electronic manifest requirement for all individuals onboard private aircraft arriving in and departing from...) Electronic manifest requirement for all individuals onboard private aircraft arriving in the U.S.; notice...

  5. 19 CFR 122.22 - Electronic manifest requirement for all individuals onboard private aircraft arriving in and...

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... individuals onboard private aircraft arriving in and departing from the United States; notice of arrival and... Electronic manifest requirement for all individuals onboard private aircraft arriving in and departing from...) Electronic manifest requirement for all individuals onboard private aircraft arriving in the U.S.; notice...

  6. 19 CFR 122.22 - Electronic manifest requirement for all individuals onboard private aircraft arriving in and...

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... individuals onboard private aircraft arriving in and departing from the United States; notice of arrival and... Electronic manifest requirement for all individuals onboard private aircraft arriving in and departing from...) Electronic manifest requirement for all individuals onboard private aircraft arriving in the U.S.; notice...

  7. X-36 Tailless Fighter Agility Research Aircraft arrival at Dryden

    NASA Technical Reports Server (NTRS)

    1996-01-01

    NASA and McDonnell Douglas Corporation (MDC) personnel remove protective covers from the newly arrived NASA/McDonnell Douglas Corporation X-36 Tailless Fighter Agility Research Aircraft. It arrived at NASA Dryden Flight Research Center, Edwards, California, on July 2, 1996. The NASA/Boeing X-36 Tailless Fighter Agility Research Aircraft program successfully demonstrated the tailless fighter design using advanced technologies to improve the maneuverability and survivability of possible future fighter aircraft. The program met or exceeded all project goals. For 31 flights during 1997 at the Dryden Flight Research Center, Edwards, California, the project team examined the aircraft's agility at low speed / high angles of attack and at high speed / low angles of attack. The aircraft's speed envelope reached up to 206 knots (234 mph). This aircraft was very stable and maneuverable. It handled very well. The X-36 vehicle was designed to fly without the traditional tail surfaces common on most aircraft. Instead, a canard forward of the wing was used as well as split ailerons and an advanced thrust-vectoring nozzle for directional control. The X-36 was unstable in both pitch and yaw axes, so an advanced, single-channel digital fly-by-wire control system (developed with some commercially available components) was put in place to stabilize the aircraft. Using a video camera mounted in the nose of the aircraft and an onboard microphone, the X-36 was remotely controlled by a pilot in a ground station virtual cockpit. A standard fighter-type head-up display (HUD) and a moving-map representation of the vehicle's position within the range in which it flew provided excellent situational awareness for the pilot. This pilot-in-the-loop approach eliminated the need for expensive and complex autonomous flight control systems and the risks associated with their inability to deal with unknown or unforeseen phenomena in flight. Fully fueled the X-36 prototype weighed approximately 1

  8. Factors Associated with Early Hospital Arrival in Patients with Acute Ischemic Stroke

    PubMed Central

    Song, Dongbeom; Tanaka, Eijirou; Lee, Kijeong; Sato, Shoichiro; Koga, Masatoshi; Kim, Young Dae; Nagatsuka, Kazuyuki; Toyoda, Kazunori

    2015-01-01

    Background and Purpose Factors associated with early arrival may vary according to the characteristics of the hospital. We investigated the factors associated with early hospital arrival in two different stroke centers located in Korea and Japan. Methods Consecutive patients with ischemic stroke arrived hospital within 48 hours of onset between January 2011 and December 2012 were identified and the clinical and time variables were retrieved from the prospective stroke registries of Severance Hospital of Yonsei University Health System (YUHS; Seoul, Korea) and National Cerebral and Cardiovascular Center (NCVC; Osaka, Japan). Subjects were dichotomized into early (time from onset to arrival ≤4.5 hours) and late (>4.5 hours) arrival groups. Univariate and multivariate analyses were performed to evaluate factors associated with early hospital arrival. Results A total of 1,966 subjects (992 from YUHS; 974 from NCVC) were included in this study. The median time from onset to arrival was 6.1 hours [interquartile range, 1.7-17.8 hours]. In multivariate analysis, the factors associated with early arrival were atrial fibrillation (Odds ratio [OR], 1.505; 95% confidence interval [CI], [1.168-1.939]), higher initial National Institute of Health Stroke Scale scores (OR, 1.037; 95% CI [1.023-1.051]), onset during daytime (OR, 2.799; 95% CI [2.173-3.605]), and transport by an emergency medical service (OR, 2.127; 95% CI [1.700-2.661]). These factors were consistently associated with early arrival in both hospitals. Conclusions Despite differences between the hospitals, there were common factors related to early arrival. Efforts to identify and modify these factors may promote early hospital arrival and improve stroke outcome. PMID:26060803

  9. Full-halo coronal mass ejections: Arrival at the Earth

    NASA Astrophysics Data System (ADS)

    Shen, Chenglong; Wang, Yuming; Pan, Zonghao; Miao, Bin; Ye, Pinzhong; Wang, S.

    2014-07-01

    A geomagnetic storm is mainly caused by a frontside coronal mass ejection (CME) hitting the Earth and then interacting with the magnetosphere. However, not all frontside CMEs can hit the Earth. Thus, which CMEs hit the Earth and when they do so are important issues in the study and forecasting of space weather. In our previous work, the deprojected parameters of the full-halo coronal mass ejections (FHCMEs) that occurred from 1 March 2007 to 31 May 2012 were estimated, and there are 39 frontside events that could be fitted by the Graduated Cylindrical Shell model. In this work, we continue to study whether and when these frontside FHCMEs (FFHCMEs) hit the Earth. It is found that 59% of these FFHCMEs hit the Earth, and for central events, whose deviation angles ɛ, which are the angles between the propagation direction and the Sun-Earth line, are smaller than 45°, the fraction increases to 75%. After checking the deprojected angular widths of the CMEs, we found that all of the Earth-encountered CMEs satisfy a simple criterion that the angular width (ω) is larger than twice the deviation angle (ɛ). This result suggests that some simple criteria can be used to forecast whether a CME could hit the Earth. Furthermore, for Earth-encountered CMEs, the transit time is found to be roughly anticorrelated with the deprojected velocity, but some events significantly deviate from the linearity. For CMEs with similar velocities, the differences of their transit times can be up to several days. Such deviation is further demonstrated to be mainly caused by the CME geometry and propagation direction, which are essential in the forecasting of CME arrival.

  10. Post-Arrival Health Screening in Karen Refugees in Australia

    PubMed Central

    Paxton, Georgia A.; Sangster, Katrina J.; Maxwell, Ellen L.; McBride, Catherine R. J.; Drewe, Ross H.

    2012-01-01

    Objective To document the prevalence of nutritional deficiencies, infectious diseases and susceptibility to vaccine preventable diseases in Karen refugees in Australia. Design Retrospective audit of pathology results. Setting Community based cohort in Melbourne over the period July 2006–October 2009. Participants 1136 Karen refugee children and adults, representing almost complete local area settlement and 48% of total Victorian Karen humanitarian intake for the time period. Main Outcome Measures Prevalence of positive test results for refugee health screening, with breakdown by age group (<6 years, 6–11 years, 12–17 years, 18 years and older). Results Overall prevalence figures were: anaemia 9.2%, microcytosis 19.1%, iron deficiency 13.1%, low vitamin B12 1.5%, low folate 1.5%, abnormal thyroid function tests 4.4%, vitamin D<50 nmol/L 33.3%, hypocalcaemia 7.4%, raised alkaline phosphatase 5.2%, abnormal liver transaminases 16.1%, hepatitis B surface antigen positive 9.7%, hepatitis B surface antibody positive 49.5%, isolated hepatitis B core antibody positive 9.0%, hepatitis C positive 1.9%, eosinophilia 14.4%, Schistosoma infection 7%, Strongyloides infection 20.8%, malaria 0.2%, faecal parasites 43.4%. Quantiferon-gold screening was positive in 20.9%. No cases of syphilis or HIV were identified. Serological immunity to vaccine preventable diseases was 87.1% for measles, 95% for mumps and 66.4% for rubella; 56.9% of those tested had seroimmunity to all three. Conclusions Karen refugees have high rates of nutritional deficiencies and infectious diseases and may be susceptible to vaccine preventable diseases. These data support the need for post-arrival health screening and accessible, funded catch-up immunisation. PMID:22693599

  11. Airborne-Managed Spacing in Multiple Arrival Streams

    NASA Technical Reports Server (NTRS)

    Barmore, Bryan; Abbott, Terence; Krishnamurthy, Karthik

    2004-01-01

    A significant bottleneck in the current air traffic system occurs at the runway. Expanding airports and adding new runways will help solve this problem; however, this comes at a significant cost, financially, politically and environmentally. A complementary solution is to safely increase the capacity of current runways. This can be achieved by precise spacing at the runway threshold with a resulting reduction in the spacing buffer required under today s operations. At the NASA Langley Research Center, the Advanced Air Transportation Technologies (AATT) Project is investigating airborne technologies and procedures that will assist the pilot in achieving precise spacing behind another aircraft. This new spacing clearance instructs the pilot to follow speed cues from a new on-board guidance system called Airborne Merging and Spacing for Terminal Arrivals (AMSTAR). AMSTAR receives Automatic Dependent Surveillance-Broadcast (ADS-B) reports from the leading aircraft and calculates the appropriate speed for the ownership to fly in order to achieve the desired spacing interval, time or distance-based, at the runway threshold. Since the goal is overall system capacity, the speed guidance algorithm is designed to provide system benefit over individual efficiency. This paper discusses the concept of operations and design of AMSTAR to support airborne precision spacing. Results from the previous stage of development, focused only on in-trail spacing, are discussed along with the evolution of the concept to include merging of converging streams of traffic. This paper also examines how this operation might support future wake vortex-based separation and other advances in terminal area operations. Finally, the research plan for the merging capabilities, to be performed during the summer and fall of 2004 is presented.

  12. Health status of newly arrived refugees in Toronto, Ont

    PubMed Central

    Redditt, Vanessa J.; Janakiram, Praseedha; Graziano, Daniela; Rashid, Meb

    2015-01-01

    Abstract Objective To determine the prevalence of selected infectious diseases among newly arrived refugee patients and whether there is variation by key demographic factors. Design Retrospective chart review. Setting Primary care clinic for refugee patients in Toronto, Ont. Participants A total of 1063 refugee patients rostered at the clinic from December 2011 to June 2014. Main outcome measures Demographic information (age, sex, and region of birth); prevalence of HIV, hepatitis B, hepatitis C, Strongyloides, Schistosoma, intestinal parasites, gonorrhea, chlamydia, and syphilis infections; and varicella immune status. Results The median age of patients was 29 years and 56% were female. Refugees were born in 87 different countries. Approximately 33% of patients were from Africa, 28% were from Europe, 14% were from the Eastern Mediterranean Region, 14% were from Asia, and 8% were from the Americas (excluding 4% born in Canada or the United States). The overall rate of HIV infection was 2%. The prevalence of hepatitis B infection was 4%, with a higher rate among refugees from Asia (12%, P < .001). Hepatitis B immunity was 39%, with higher rates among Asian refugees (64%, P < .001) and children younger than 5 years (68%, P < .001). The rate of hepatitis C infection was less than 1%. Strongyloides infection was found in 3% of tested patients, with higher rates among refugees from Africa (6%, P = .003). Schistosoma infection was identified in 15% of patients from Africa. Intestinal parasites were identified in 16% of patients who submitted stool samples. Approximately 8% of patients were varicella nonimmune, with higher rates in patients from the Americas (21%, P < .001). Conclusion This study highlights the importance of screening for infectious diseases among refugee patients to provide timely preventive and curative care. Our data also point to possible policy and clinical implications, such as targeted screening approaches and improved access to vaccinations and

  13. To Build a Better (Digital) Mousetrap: Testing the Learning Effectiveness of Al Gore's Book "Our Choice" against the iPad App Based on the Book in Order to Suggest Design Improvements for Future Enriched Ebooks

    ERIC Educational Resources Information Center

    Halliday, Steven W.

    2012-01-01

    This sequential explanatory mixed methods study tested the learning effectiveness of a codex book against a convergent media resource based on the same content. It also investigated whether users of the two formats reported any differences in their liking of the two formats, or in their tendency to be persuaded to the degree that they altered…

  14. 19 CFR 141.82 - Invoice for installment shipments arriving within a period of 10 days.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 2 2010-04-01 2010-04-01 false Invoice for installment shipments arriving within..., DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) ENTRY OF MERCHANDISE Invoices § 141.82 Invoice for installment shipments arriving within a period of 10 days. (a) One invoice...

  15. 19 CFR 12.112 - Notice of arrival of pesticides and devices.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 1 2012-04-01 2012-04-01 false Notice of arrival of pesticides and devices. 12...; DEPARTMENT OF THE TREASURY SPECIAL CLASSES OF MERCHANDISE Pesticides and Devices § 12.112 Notice of arrival of pesticides and devices. (a) General. An importer desiring to import pesticides or devices into...

  16. 19 CFR 12.112 - Notice of arrival of pesticides and devices.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Notice of arrival of pesticides and devices. 12...; DEPARTMENT OF THE TREASURY SPECIAL CLASSES OF MERCHANDISE Pesticides and Devices § 12.112 Notice of arrival of pesticides and devices. (a) General. An importer desiring to import pesticides or devices into...

  17. 19 CFR 12.112 - Notice of arrival of pesticides and devices.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 1 2013-04-01 2013-04-01 false Notice of arrival of pesticides and devices. 12...; DEPARTMENT OF THE TREASURY SPECIAL CLASSES OF MERCHANDISE Pesticides and Devices § 12.112 Notice of arrival of pesticides and devices. (a) General. An importer desiring to import pesticides or devices into...

  18. 19 CFR 12.112 - Notice of arrival of pesticides and devices.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 1 2014-04-01 2014-04-01 false Notice of arrival of pesticides and devices. 12...; DEPARTMENT OF THE TREASURY SPECIAL CLASSES OF MERCHANDISE Pesticides and Devices § 12.112 Notice of arrival of pesticides and devices. (a) General. An importer desiring to import pesticides or devices into...

  19. 7 CFR 319.24-4 - Notice of arrival of corn by permittee.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 5 2011-01-01 2011-01-01 false Notice of arrival of corn by permittee. 319.24-4... HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Corn Diseases Regulations Governing Entry of Indian Corn Or Maize § 319.24-4 Notice of arrival of corn by permittee. Immediately...

  20. 7 CFR 319.24-4 - Notice of arrival of corn by permittee.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 5 2010-01-01 2010-01-01 false Notice of arrival of corn by permittee. 319.24-4... HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Corn Diseases Regulations Governing Entry of Indian Corn Or Maize § 319.24-4 Notice of arrival of corn by permittee. Immediately...

  1. 33 CFR 401.60 - Listening watch and notice of arrival.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Listening watch and notice of arrival. 401.60 Section 401.60 Navigation and Navigable Waters SAINT LAWRENCE SEAWAY DEVELOPMENT....60 Listening watch and notice of arrival. (a) Vessels shall be on radio listening watch on...

  2. 27 CFR 26.118 - Inspection by district director of customs at port of arrival.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... PUERTO RICO AND THE VIRGIN ISLANDS Taxpayment of Liquors and Articles in Puerto Rico Procedure at Port of... Puerto Rico, the district director of customs at the port of arrival shall inspect the merchandise to... director of customs at port of arrival. 26.118 Section 26.118 Alcohol, Tobacco Products and...

  3. 19 CFR 148.17 - Declaration on arrival incidental to further foreign travel.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... foreign travel. 148.17 Section 148.17 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF... § 148.17 Declaration on arrival incidental to further foreign travel. (a) Declaration on incidental arrival. A resident who enters the United States merely as an incident of foreign travel and who...

  4. 19 CFR 148.17 - Declaration on arrival incidental to further foreign travel.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... foreign travel. 148.17 Section 148.17 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF... § 148.17 Declaration on arrival incidental to further foreign travel. (a) Declaration on incidental arrival. A resident who enters the United States merely as an incident of foreign travel and who...

  5. 19 CFR 148.17 - Declaration on arrival incidental to further foreign travel.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... foreign travel. 148.17 Section 148.17 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF... § 148.17 Declaration on arrival incidental to further foreign travel. (a) Declaration on incidental arrival. A resident who enters the United States merely as an incident of foreign travel and who...

  6. 19 CFR 148.17 - Declaration on arrival incidental to further foreign travel.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... foreign travel. 148.17 Section 148.17 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF... § 148.17 Declaration on arrival incidental to further foreign travel. (a) Declaration on incidental arrival. A resident who enters the United States merely as an incident of foreign travel and who...

  7. 19 CFR 148.17 - Declaration on arrival incidental to further foreign travel.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... foreign travel. 148.17 Section 148.17 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF... § 148.17 Declaration on arrival incidental to further foreign travel. (a) Declaration on incidental arrival. A resident who enters the United States merely as an incident of foreign travel and who...

  8. 76 FR 2254 - Notice of Arrival on the Outer Continental Shelf

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-13

    ... Arrival (NOA) on the Outer Continental Shelf in the Federal Register (74 FR 29439). We received two sets... established on March 4, 1982, as part of a final rule entitled, Outer Continental Shelf Activities (47 FR 9366... SECURITY Coast Guard 33 CFR Part 146 RIN 1625-AB28 Notice of Arrival on the Outer Continental Shelf...

  9. 77 FR 57572 - Notice of Arrival on the Outer Continental Shelf

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-18

    ... of Arrival (NOA) on the Outer Continental Shelf (OCS) final rule [Docket No. USCG-2008-1088] (76 FR... SECURITY Coast Guard Notice of Arrival on the Outer Continental Shelf AGENCY: Coast Guard, DHS. ACTION... Continental Shelf (OCS). The Coast Guard NOA-OCS program currently requires NOA information for those...

  10. 7 CFR 319.24-4 - Notice of arrival of corn by permittee.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 5 2013-01-01 2013-01-01 false Notice of arrival of corn by permittee. 319.24-4... HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Corn Diseases Regulations Governing Entry of Indian Corn Or Maize § 319.24-4 Notice of arrival of corn by permittee. Immediately...

  11. 7 CFR 319.24-4 - Notice of arrival of corn by permittee.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 5 2012-01-01 2012-01-01 false Notice of arrival of corn by permittee. 319.24-4... HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Corn Diseases Regulations Governing Entry of Indian Corn Or Maize § 319.24-4 Notice of arrival of corn by permittee. Immediately...

  12. 7 CFR 319.24-4 - Notice of arrival of corn by permittee.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 5 2014-01-01 2014-01-01 false Notice of arrival of corn by permittee. 319.24-4... HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Corn Diseases Regulations Governing Entry of Indian Corn Or Maize § 319.24-4 Notice of arrival of corn by permittee. Immediately...

  13. 19 CFR 12.112 - Notice of arrival of pesticides and devices.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Notice of arrival of pesticides and devices. 12...; DEPARTMENT OF THE TREASURY SPECIAL CLASSES OF MERCHANDISE Pesticides and Devices § 12.112 Notice of arrival of pesticides and devices. (a) General. An importer desiring to import pesticides or devices into...

  14. 14 CFR 93.28 - One-for-one trade of Arrival Authorizations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false One-for-one trade of Arrival Authorizations... Reduction at Chicago O'Hare International Airport § 93.28 One-for-one trade of Arrival Authorizations. (a... been assigned with another Carrier on a one-for-one basis for the purpose of conducting that...

  15. 19 CFR 123.1 - Report of arrival from Canada or Mexico and permission to proceed.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... and Naturalization Regulations at 8 CFR 235.7), must report their arrival to Customs, and failure to... Service facilitated entry program (See, Immigration and Naturalization Regulations at 8 CFR 235.1 and 286... 19 Customs Duties 1 2013-04-01 2013-04-01 false Report of arrival from Canada or Mexico...

  16. 19 CFR 123.1 - Report of arrival from Canada or Mexico and permission to proceed.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... and Naturalization Regulations at 8 CFR 235.7), must report their arrival to Customs, and failure to... Service facilitated entry program (See, Immigration and Naturalization Regulations at 8 CFR 235.1 and 286... 19 Customs Duties 1 2014-04-01 2014-04-01 false Report of arrival from Canada or Mexico...

  17. 19 CFR 123.1 - Report of arrival from Canada or Mexico and permission to proceed.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... and Naturalization Regulations at 8 CFR 235.7), must report their arrival to Customs, and failure to... Service facilitated entry program (See, Immigration and Naturalization Regulations at 8 CFR 235.1 and 286... 19 Customs Duties 1 2012-04-01 2012-04-01 false Report of arrival from Canada or Mexico...

  18. 19 CFR 162.5 - Search of arriving vehicles and aircraft.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 2 2010-04-01 2010-04-01 false Search of arriving vehicles and aircraft. 162.5...; DEPARTMENT OF THE TREASURY (CONTINUED) INSPECTION, SEARCH, AND SEIZURE Inspection, Examination, and Search § 162.5 Search of arriving vehicles and aircraft. A customs officer may stop any vehicle and board...

  19. 19 CFR 162.5 - Search of arriving vehicles and aircraft.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 2 2011-04-01 2011-04-01 false Search of arriving vehicles and aircraft. 162.5...; DEPARTMENT OF THE TREASURY (CONTINUED) INSPECTION, SEARCH, AND SEIZURE Inspection, Examination, and Search § 162.5 Search of arriving vehicles and aircraft. A customs officer may stop any vehicle and board...

  20. 19 CFR 162.5 - Search of arriving vehicles and aircraft.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 2 2012-04-01 2012-04-01 false Search of arriving vehicles and aircraft. 162.5...; DEPARTMENT OF THE TREASURY (CONTINUED) INSPECTION, SEARCH, AND SEIZURE Inspection, Examination, and Search § 162.5 Search of arriving vehicles and aircraft. A customs officer may stop any vehicle and board...

  1. 19 CFR 162.5 - Search of arriving vehicles and aircraft.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 2 2013-04-01 2013-04-01 false Search of arriving vehicles and aircraft. 162.5...; DEPARTMENT OF THE TREASURY (CONTINUED) INSPECTION, SEARCH, AND SEIZURE Inspection, Examination, and Search § 162.5 Search of arriving vehicles and aircraft. A customs officer may stop any vehicle and board...

  2. 19 CFR 162.5 - Search of arriving vehicles and aircraft.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 2 2014-04-01 2014-04-01 false Search of arriving vehicles and aircraft. 162.5...; DEPARTMENT OF THE TREASURY (CONTINUED) INSPECTION, SEARCH, AND SEIZURE Inspection, Examination, and Search § 162.5 Search of arriving vehicles and aircraft. A customs officer may stop any vehicle and board...

  3. 75 FR 13293 - Agency Information Collection Activities: Arrival and Departure Record

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-19

    ... previously published in the Federal Register (74 FR 64092) on December 7, 2009, allowing for a 60- day..., and the Travel and Tourism Industry I-94 (Arrival and Departure Record): Estimated Number of... (Nonimmigrant Visa Waiver Arrival/Departure), and the Electronic System for Travel Authorization (ESTA). This...

  4. 19 CFR 123.1 - Report of arrival from Canada or Mexico and permission to proceed.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... and Naturalization Regulations at 8 CFR 235.7), must report their arrival to Customs, and failure to... Service facilitated entry program (See, Immigration and Naturalization Regulations at 8 CFR 235.1 and 286... 19 Customs Duties 1 2011-04-01 2011-04-01 false Report of arrival from Canada or Mexico...

  5. Timing the Random and Anomalous Arrival of Particles in a Geiger Counter with GPS Devices

    ERIC Educational Resources Information Center

    Blanco, F.; La Rocca, P.; Riggi, F.; Riggi, S.

    2008-01-01

    The properties of the arrival time distribution of particles in a detector have been studied by the use of a small Geiger counter, with a GPS device to tag the event time. The experiment is intended to check the basic properties of the random arrival time distribution between successive events and to simulate the investigations carried out by…

  6. 77 FR 49057 - Categorical Exclusion From Further Environmental Review for Standard Terminal Arrival Route...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-15

    ... Terminal Arrival Route Procedures for Ronald Reagan Washington National Airport AGENCY: Air Traffic... is issuing this notice to advise the public of its environmental review of two standard terminal... terminal area procedures. The NUMMY is a conventional arrival procedure which accommodates the...

  7. The Education and Wages of Immigrant Children: The Impact of Age at Arrival.

    ERIC Educational Resources Information Center

    Gonzalez, Arturo

    2003-01-01

    Examines whether age of arrival of immigrant children affects their educational attainment in American schools and their subsequent wages. Finds that in certain cases, immigrants who arrive at younger ages complete more years of school, and as a consequence earn higher wages. (Contains 23 references.) (PKP)

  8. 19 CFR 4.81 - Reports of arrivals and departures in coastwise trade.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Reports of arrivals and departures in coastwise trade. 4.81 Section 4.81 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY VESSELS IN FOREIGN AND DOMESTIC TRADES Coastwise Procedure § 4.81 Reports of arrivals and departures in...

  9. Improvement to Airport Throughput Using Intelligent Arrival Scheduling and an Expanded Planning Horizon

    NASA Technical Reports Server (NTRS)

    Glaab, Patricia C.

    2012-01-01

    The first phase of this study investigated the amount of time a flight can be delayed or expedited within the Terminal Airspace using only speed changes. The Arrival Capacity Calculator analysis tool was used to predict the time adjustment envelope for standard descent arrivals and then for CDA arrivals. Results ranged from 0.77 to 5.38 minutes. STAR routes were configured for the ACES simulation, and a validation of the ACC results was conducted comparing the maximum predicted time adjustments to those seen in ACES. The final phase investigated full runway-to-runway trajectories using ACES. The radial distance used by the arrival scheduler was incrementally increased from 50 to 150 nautical miles (nmi). The increased Planning Horizon radii allowed the arrival scheduler to arrange, path stretch, and speed-adjust flights to more fully load the arrival stream. The average throughput for the high volume portion of the day increased from 30 aircraft per runway for the 50 nmi radius to 40 aircraft per runway for the 150 nmi radius for a traffic set representative of high volume 2018. The recommended radius for the arrival scheduler s Planning Horizon was found to be 130 nmi, which allowed more than 95% loading of the arrival stream.

  10. 19 CFR 148.8 - Temporary importation by residents arriving for short visits.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... short visits. 148.8 Section 148.8 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF... Provisions § 148.8 Temporary importation by residents arriving for short visits. A person claiming the status of a nonresident upon arrival for a short visit in the United States before returning abroad...

  11. 19 CFR 148.8 - Temporary importation by residents arriving for short visits.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... short visits. 148.8 Section 148.8 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF... Provisions § 148.8 Temporary importation by residents arriving for short visits. A person claiming the status of a nonresident upon arrival for a short visit in the United States before returning abroad...

  12. 19 CFR 123.1 - Report of arrival from Canada or Mexico and permission to proceed.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... and Naturalization Regulations at 8 CFR 235.7), must report their arrival to Customs, and failure to... Service facilitated entry program (See, Immigration and Naturalization Regulations at 8 CFR 235.1 and 286... 19 Customs Duties 1 2010-04-01 2010-04-01 false Report of arrival from Canada or Mexico...

  13. Immigrant Children's Age at Arrival and Assessment Results. OECD Education Working Papers, No. 75

    ERIC Educational Resources Information Center

    Heath, Anthony; Kilpi-Jakonen, Elina

    2012-01-01

    While a number of single-country studies have been done to explore whether or not there is a "critical age" at which the arrival in a new country becomes a steep disadvantage to the immigrant student, this study aims to determine whether the steepness of the age-at-arrival/test score profile varies across origin or destination countries. As…

  14. Microseismic event location using an inverse method of joint P-S phase arrival difference and P-wave arrival difference in a borehole system

    NASA Astrophysics Data System (ADS)

    Zhou, Wen; Wang, Liangshu; Guan, Luping; Guo, Quanshi; Cui, Shuguo; Yu, Bo

    2015-04-01

    The accuracy of hypocenter location is the essential issue for microseismic monitoring, and is the basis for evaluating the effect of fracture. Although the signal obtained from a borehole monitoring system has a higher signal to noise ratio (SNR) than the surface system, a narrow monitoring aperture makes the location sensitive to noise and tends to be a misguided shape. In order to overcome this disadvantage and obtain a more accurate estimation of the source, we develop a ‘jointing method’, which combines the P-S phase arrival difference and P-wave arrival difference of each receiver pair (PSP) in the objective function. In the synthetic example, we compare the noise responses of three different location methods which are based on P-wave arrival time difference, P-S wave arrival time difference and the PSP method, respectively. This analysis shows that the P-wave arrival difference method is more sensitive to arrival time error than the others and the location results tend to be in a misleading line directed to the receivers. The P-S arrival difference method is more robust than the method using P-wave and its error distribution is perpendicular to the ray-path direction. The PSP method, as expected, is the most stable and accurate. When the P-S method and PSP method are applied to field data of a coal bed methane hydro-fracture process monitoring, the results indicate that the PSP method is preferable. The successful location with the PSP method proves that it is suitable for field data.

  15. Particle detection and non-detection in a quantum time of arrival measurement

    NASA Astrophysics Data System (ADS)

    Sombillo, Denny Lane B.; Galapon, Eric A.

    2016-01-01

    The standard time-of-arrival distribution cannot reproduce both the temporal and the spatial profile of the modulus squared of the time-evolved wave function for an arbitrary initial state. In particular, the time-of-arrival distribution gives a non-vanishing probability even if the wave function is zero at a given point for all values of time. This poses a problem in the standard formulation of quantum mechanics where one quantizes a classical observable and uses its spectral resolution to calculate the corresponding distribution. In this work, we show that the modulus squared of the time-evolved wave function is in fact contained in one of the degenerate eigenfunctions of the quantized time-of-arrival operator. This generalizes our understanding of quantum arrival phenomenon where particle detection is not a necessary requirement, thereby providing a direct link between time-of-arrival quantization and the outcomes of the two-slit experiment.

  16. Mars Science Laboratory Launch-Arrival Space Study: A Pork Chop Plot Analysis

    NASA Technical Reports Server (NTRS)

    Cianciolo, Alicia Dwyer; Powell, Richard; Lockwood, Mary Kae

    2006-01-01

    Launch-Arrival, or "pork chop", plot analysis can provide mission designers with valuable information and insight into a specific launch and arrival space selected for a mission. The study begins with the array of entry states for each pair of selected Earth launch and Mars arrival dates, and nominal entry, descent and landing trajectories are simulated for each pair. Parameters of interest, such as maximum heat rate, are plotted in launch-arrival space. The plots help to quickly identify launch and arrival regions that are not feasible under current constraints or technology and also provide information as to what technologies may need to be developed to reach a desired region. This paper provides a discussion of the development, application, and results of a pork chop plot analysis to the Mars Science Laboratory mission. This technique is easily applicable to other missions at Mars and other destinations.

  17. Chandra X-Ray Observatory Arrives at KSC for Processing

    NASA Astrophysics Data System (ADS)

    1999-04-01

    The Chandra X-ray Observatory, scheduled to launch aboard Space Shuttle Columbia on mission STS-93, arrived at 2:45 p.m. EST today at the Kennedy Space Center's Shuttle Landing Facility aboard an Air Force C-5 Galaxy airplane. The telescope was shipped from the TRW plant in Redondo Beach, CA, with departure from Los Angeles International Airport occurring earlier this morning. A second airplane also brought the necessary ground support equipment to KSC for the campaign of final prelaunch integration and testing. The ground support equipment is being off loaded today. The Chandra Observatory is to be taken off the airplane early Friday morning and transported to the Vertical Processing Facility located in the KSC Industrial Area. There, the telescope will undergo final installation of associated electronic components, be tested, fueled, and mated with the Inertial Upper Stage (IUS) booster. A set of integrated tests will follow. A major milestone is the test using the Cargo Integrated Test Equipment (CITE) to verify that Chandra and the Inertial Upper Stage will have the ability to receive and reply to commands once aboard the Space Shuttle. Also, an end-to-end test will verify the communications systems of the payload and its ability to communicate through the Tracking and Data Relay Satellite system with Mission Control in Houston and the Chandra ground station located in Cambridge, MA. The Chandra/IUS combination will then be ready to go to the launch pad. Once in the payload changeout room at Pad 39-B, the protective cocoon will be removed from around the telescope and it will be installed into Space Shuttle Columbia. An Integrated Verification Test will be conducted to check all of the electrical connections and the ability of the astronauts to send and receive commands from Columbia's flight deck. The end-to-end test will be repeated at the pad. Finally the IUS will go through a simulated countdown to verify its readiness for launch. Chandra will use the world

  18. X-38 Arrival at NASA Dryden on June 4, 1997

    NASA Technical Reports Server (NTRS)

    1997-01-01

    NASA's first X-38 Advanced Technology Demonstrator for the proposed Crew Return Vehicle (CRV) arrives at NASA's Dryden Flight Research Center, Edwards, California, in June 1997. The vehicle arrived aboard a USAF C-17 transport aircraft from NASA's Johnson Space Center (JSC). The X-38 Crew Return Vehicle (CRV) research project is designed to develop the technology for a prototype emergency crew return vehicle, or lifeboat, for the International Space Station. The project is also intended to develop a crew return vehicle design that could be modified for other uses, such as a joint U.S. and international human spacecraft that could be launched on the French Ariane-5 Booster. The X-38 project is using available technology and off-the-shelf equipment to significantly decrease development costs. Original estimates to develop a capsule-type crew return vehicle were estimated at more than $2 billion. X-38 project officials have estimated that development costs for the X-38 concept will be approximately one quarter of the original estimate. Off-the-shelf technology is not necessarily 'old' technology. Many of the technologies being used in the X-38 project have never before been applied to a human-flight spacecraft. For example, the X-38 flight computer is commercial equipment currently used in aircraft and the flight software operating system is a commercial system already in use in many aerospace applications. The video equipment for the X-38 is existing equipment, some of which has already flown on the space shuttle for previous NASA experiments. The X-38's primary navigational equipment, the Inertial Navigation System/Global Positioning System, is a unit already in use on Navy fighters. The X-38 electromechanical actuators come from previous joint NASA, U.S. Air Force, and U.S. Navy research and development projects. Finally, an existing special coating developed by NASA will be used on the X-38 thermal tiles to make them more durable than those used on the space

  19. X-38 Arrival at NASA Dryden on June 4, 1997

    NASA Technical Reports Server (NTRS)

    1997-01-01

    NASA's first X-38 Advanced Technology Demonstrator for the proposed Crew Return Vehicle (CRV) arrives at NASA's Dryden Flight Research Center, Edwards, California, in June 1997. The vehicle arrived aboard a USAF C-17 transport aircraft from NASA's Johnson Space Center (JSC). Captive-carry flights attached under the wing of Dryden's B-52 are scheduled to begin in July, with unpiloted free-flights from the B-52 scheduled to begin in the fall. The X-38 Crew Return Vehicle (CRV) research project is designed to develop the technology for a prototype emergency crew return vehicle, or lifeboat, for the International Space Station. The project is also intended to develop a crew return vehicle design that could be modified for other uses, such as a joint U.S. and international human spacecraft that could be launched on the French Ariane-5 Booster. The X-38 project is using available technology and off-the-shelf equipment to significantly decrease development costs. Original estimates to develop a capsule-type crew return vehicle were estimated at more than $2 billion. X-38 project officials have estimated that development costs for the X-38 concept will be approximately one quarter of the original estimate. Off-the-shelf technology is not necessarily 'old' technology. Many of the technologies being used in the X-38 project have never before been applied to a human-flight spacecraft. For example, the X-38 flight computer is commercial equipment currently used in aircraft and the flight software operating system is a commercial system already in use in many aerospace applications. The video equipment for the X-38 is existing equipment, some of which has already flown on the space shuttle for previous NASA experiments. The X-38's primary navigational equipment, the Inertial Navigation System/Global Positioning System, is a unit already in use on Navy fighters. The X-38 electromechanical actuators come from previous joint NASA, U.S. Air Force, and U.S. Navy research and

  20. X-38 Arrival at NASA Dryden on June 4, 1997

    NASA Technical Reports Server (NTRS)

    1997-01-01

    Technicians unload NASA's first X-38 Advanced Technology Demonstrator for the proposed Crew Return Vehicle (CRV) into a hangar upon its arrival at NASA's Dryden Flight Research Center, Edwards, California, in June 1997. The vehicle arrived aboard a USAF C-17 transport aircraft from NASA's Johnson Space Center (JSC). The X-38 Crew Return Vehicle (CRV) research project is designed to develop the technology for a prototype emergency crew return vehicle, or lifeboat, for the International Space Station. The project is also intended to develop a crew return vehicle design that could be modified for other uses, such as a joint U.S. and international human spacecraft that could be launched on the French Ariane-5 Booster. The X-38 project is using available technology and off-the-shelf equipment to significantly decrease development costs. Original estimates to develop a capsule-type crew return vehicle were estimated at more than $2 billion. X-38 project officials have estimated that development costs for the X-38 concept will be approximately one quarter of the original estimate. Off-the-shelf technology is not necessarily 'old' technology. Many of the technologies being used in the X-38 project have never before been applied to a human-flight spacecraft. For example, the X-38 flight computer is commercial equipment currently used in aircraft and the flight software operating system is a commercial system already in use in many aerospace applications. The video equipment for the X-38 is existing equipment, some of which has already flown on the space shuttle for previous NASA experiments. The X-38's primary navigational equipment, the Inertial Navigation System/Global Positioning System, is a unit already in use on Navy fighters. The X-38 electromechanical actuators come from previous joint NASA, U.S. Air Force, and U.S. Navy research and development projects. Finally, an existing special coating developed by NASA will be used on the X-38 thermal tiles to make them more

  1. X-38 Arrival at NASA Dryden on June 4, 1997

    NASA Technical Reports Server (NTRS)

    1997-01-01

    NASA's first X-38 Advanced Technology Demonstrator for the proposed Crew Return Vehicle (CRV) is transported across the ramp after its arrival at NASA's Dryden Flight Research Center, Edwards, California, in June 1997. The vehicle arrived aboard a USAF C-17 transport aircraft from NASA's Johnson Space Center (JSC). The X-38 Crew Return Vehicle (CRV) research project is designed to develop the technology for a prototype emergency crew return vehicle, or lifeboat, for the International Space Station. The project is also intended to develop a crew return vehicle design that could be modified for other uses, such as a joint U.S. and international human spacecraft that could be launched on the French Ariane-5 Booster. The X-38 project is using available technology and off-the-shelf equipment to significantly decrease development costs. Original estimates to develop a capsule-type crew return vehicle were estimated at more than $2 billion. X-38 project officials have estimated that development costs for the X-38 concept will be approximately one quarter of the original estimate. Off-the-shelf technology is not necessarily 'old' technology. Many of the technologies being used in the X-38 project have never before been applied to a human-flight spacecraft. For example, the X-38 flight computer is commercial equipment currently used in aircraft and the flight software operating system is a commercial system already in use in many aerospace applications. The video equipment for the X-38 is existing equipment, some of which has already flown on the space shuttle for previous NASA experiments. The X-38's primary navigational equipment, the Inertial Navigation System/Global Positioning System, is a unit already in use on Navy fighters. The X-38 electromechanical actuators come from previous joint NASA, U.S. Air Force, and U.S. Navy research and development projects. Finally, an existing special coating developed by NASA will be used on the X-38 thermal tiles to make them more

  2. X-38 Arrival at NASA Dryden on June 4, 1997

    NASA Technical Reports Server (NTRS)

    1997-01-01

    NASA's first X-38 Advanced Technology Demonstrator for the proposed Crew Return Vehicle (CRV) arrives at NASA's Dryden Flight Research Center, Edwards, California, in June 1997. The vehicle arrived aboard a USAF C-17 transport aircraft from NASA's Johnson Space Center (JSC) and is seen here on the ramp with NASA's Boeing 747 Shuttle Carrier Aircraft (SCA) in the background. The X-38 Crew Return Vehicle (CRV) research project is designed to develop the technology for a prototype emergency crew return vehicle, or lifeboat, for the International Space Station. The project is also intended to develop a crew return vehicle design that could be modified for other uses, such as a joint U.S. and international human spacecraft that could be launched on the French Ariane-5 Booster. The X-38 project is using available technology and off-the-shelf equipment to significantly decrease development costs. Original estimates to develop a capsule-type crew return vehicle were estimated at more than $2 billion. X-38 project officials have estimated that development costs for the X-38 concept will be approximately one quarter of the original estimate. Off-the-shelf technology is not necessarily 'old' technology. Many of the technologies being used in the X-38 project have never before been applied to a human-flight spacecraft. For example, the X-38 flight computer is commercial equipment currently used in aircraft and the flight software operating system is a commercial system already in use in many aerospace applications. The video equipment for the X-38 is existing equipment, some of which has already flown on the space shuttle for previous NASA experiments. The X-38's primary navigational equipment, the Inertial Navigation System/Global Positioning System, is a unit already in use on Navy fighters. The X-38 electromechanical actuators come from previous joint NASA, U.S. Air Force, and U.S. Navy research and development projects. Finally, an existing special coating developed by

  3. X-38 Arrival at NASA Dryden on June 4, 1997

    NASA Technical Reports Server (NTRS)

    1997-01-01

    NASA's first X-38 Advanced Technology Demonstrator for the proposed Crew Return Vehicle (CRV) is transported down a road at NASA's Dryden Flight Research Center, Edwards, California, upon its arrival there in June 1997. The vehicle arrived aboard a USAF C-17 transport aircraft from NASA's Johnson Space Center (JSC). The X-38 Crew Return Vehicle (CRV) research project is designed to develop the technology for a prototype emergency crew return vehicle, or lifeboat, for the International Space Station. The project is also intended to develop a crew return vehicle design that could be modified for other uses, such as a joint U.S. and international human spacecraft that could be launched on the French Ariane-5 Booster. The X-38 project is using available technology and off-the-shelf equipment to significantly decrease development costs. Original estimates to develop a capsule-type crew return vehicle were estimated at more than $2 billion. X-38 project officials have estimated that development costs for the X-38 concept will be approximately one quarter of the original estimate. Off-the-shelf technology is not necessarily 'old' technology. Many of the technologies being used in the X-38 project have never before been applied to a human-flight spacecraft. For example, the X-38 flight computer is commercial equipment currently used in aircraft and the flight software operating system is a commercial system already in use in many aerospace applications. The video equipment for the X-38 is existing equipment, some of which has already flown on the space shuttle for previous NASA experiments. The X-38's primary navigational equipment, the Inertial Navigation System/Global Positioning System, is a unit already in use on Navy fighters. The X-38 electromechanical actuators come from previous joint NASA, U.S. Air Force, and U.S. Navy research and development projects. Finally, an existing special coating developed by NASA will be used on the X-38 thermal tiles to make them more

  4. A taxonomy of three species of negative velocity arrivals in the lithospheric mantle beneath the United States using Sp receiver functions

    NASA Astrophysics Data System (ADS)

    Foster, K.; Dueker, K.; McClenahan, J.; Hansen, S. M.; Schmandt, B.

    2012-12-01

    The Transportable Array, with significant supplement from past PASSCAL experiments, provides an unprecedented opportunity for a holistic view over the geologically and tectonically diverse continent. New images from 34,000 Sp Receiver Functions image lithospheric and upper mantle structure that has not previously been well constrained, significant to our understanding of upper mantle processes and continental evolution. The negative velocity gradient (NVG) found beneath the Moho has been elusive and is often loosely termed the "Lithosphere-Asthenosphere Boundary" (LAB).This label is used by some researchers to indicate a rheological boundary, a thermal gradient, an anisotropic velocity contrast, or a compositional boundary, and much confusion has arisen around what observed NVG arrivals manifest. Deconvolution across up to 400 stations simultaneously has enhanced the source wavelet estimation and allowed for more accurate receiver functions. In addition, Sdp converted phases are precursory to the direct S phase arrival, eliminating the issue of contamination from reverberated phases that add noise to Ps receiver functions in this lower-lithospheric and upper mantle depth range. We present taxonomy of the NVG arrivals beneath the Moho across the span of the Transportable Array (125° - 85° W). The NVG is classified into three different categories, primarily distinguished by the estimated temperature at the depth of the arrival. The first species of Sp NVG arrivals is found to be in the region west of the Precambrian rift hinge line, at a depth range of 70 - 90 km, corresponding to a temperature of >1150° C. This temperature and depth is predicted to be supersolidus for a 0.02% weight H2O Peridotite (Katz et al., 2004), supporting the theory that these arrivals are due to a melt-staging area (MSA), which could be correlated with the base of the thermal lithosphere. The current depth estimate of the cratonic US thermal LAB ranges from 150-220 km (Yuan and Romanowitz

  5. Getting ready for the arrival of Sentinel data

    NASA Astrophysics Data System (ADS)

    Aschbacher, Josef; Milagro Perez, Maria Pilar

    2013-04-01

    satellites to be launched at the end of 2013 is Sentinel-1. This is a radar mission and will be engaged in wide range of land and ocean surveillance tasks, such as oil-spill monitoring and earthquake hazard assessment. It will be followed early next year by Sentinel-2 and Sentinel-3, dedicated mainly to the mapping of the Earth's surface and to the monitoring of ocean temperature and colour. The arrival of the first Sentinel data will provide systematic continuity of data already widely used within the science and application communities. It will also ensure long-term operational commitment and data consistency. The in-situ component, under the coordination of the European Environment Agency (EEA), is composed of atmospheric and Earth based monitoring systems, and based on established networks and programmes at European and international levels. The European Commission is in charge of implementing the services component of GMES and of leading GMES overall. GMES services, fed with data from the Space and In-situ components, will provide essential information in five main domains, atmosphere, ocean and land monitoring as well as emergency response and security. Climate change has been added as a new GMES service and cross-cuts all these domains. This session aims at informing users about the current programme's overall status and its potential for users in the services and scientific fields, in particular, in view of the upcoming launch of the first in the fleet of Sentinel satellites.

  6. Application of back-propagation neural networks to identification of seismic arrival types

    NASA Astrophysics Data System (ADS)

    Dai, Hengchang; MacBeth, Colin

    1997-05-01

    A back-propagation neural network (BPNN) approach is developed to identify P- and S-arrivals from three-component recordings of local earthquake data. The BPNN is trained by selecting trace segments of P- and S-waves and noise bursts converted into an attribute space based on the degree of polarization (DOP). After training, the network can automatically identify the type of arrival on earthquake recordings. Compared with manual analysis, a BPNN trained with nine groups of DOP segments can correctly identify 82.3% of the P-arrivals and 62.6% of the S-arrivals from one seismic station, and when trained with five groups from a training dataset selected from another seismic station, it can correctly identify 76.6% of the P-arrivals and 60.5% of S-arrivals. This approach is adaptive and needs only the onset time of arrivals as input, although its performance cannot be improved by simply adding more training datasets due to the complexity of DOP patterns. Our experience suggests that other information or another network may be necessary to improve its performance.

  7. Carbon isotope turnover as a measure of arrival time in migratory birds

    USGS Publications Warehouse

    Oppel, Steffen; Powell, Abby N.

    2009-01-01

    Arrival time on breeding or non-breeding areas is of interest in many ecological studies exploring fitness consequences of migratory schedules. However, in most field studies, it is difficult to precisely assess arrival time of individuals. Here, we use carbon isotope turnover in avian blood as a technique to estimate arrival time for birds switching from one habitat or environment to another. Stable carbon isotope ratios (δ13C) in blood assimilate to a new equilibrium following a diet switch according to an exponential decay function. This relationship can be used to determine the time a diet switch occurred if δ13C of both the old and new diet are known. We used published data of captive birds to validate that this approach provides reliable estimates of the time since a diet switch within 1–3 weeks after the diet switch. We then explored the utility of this technique for King Eiders (Somateria spectabilis) arriving on terrestrial breeding grounds after wintering and migration at sea. We estimated arrival time on breeding grounds in northern Alaska (95% CI) from red blood cell δ13C turnover to be 4–9 June. This estimate overlapped with arrival time of birds from the same study site tracked with satellite transmitters (5–12 June). Therefore, we conclude that this method provides a simple yet reliable way to assess arrival time of birds moving between isotopically distinct environments.

  8. Selection and evolutionary potential of spring arrival phenology in males and females of a migratory songbird.

    PubMed

    Tarka, M; Hansson, B; Hasselquist, D

    2015-05-01

    The timing of annual life-history events affects survival and reproduction of all organisms. A changing environment can perturb phenological adaptations and an important question is if populations can evolve fast enough to track the environmental changes. Yet, little is known about selection and evolutionary potential of traits determining the timing of crucial annual events. Migratory species, which travel between different climatic regions, are particularly affected by global environmental changes. To increase our understanding of evolutionary potential and selection of timing traits, we investigated the quantitative genetics of arrival date at the breeding ground using a multigenerational pedigree of a natural great reed warbler (Acrocephalus arundinaceus) population. We found significant heritability of 16.4% for arrival date and directional selection for earlier arrival in both sexes acting through reproductive success, but not through lifespan. Mean arrival date advanced with 6 days over 20 years, which is in exact accordance with our predicted evolutionary response based on the breeder's equation. However, this phenotypic change is unlikely to be caused by microevolution, because selection seems mainly to act on the nongenetic component of the trait. Furthermore, demographical changes could also not account for the advancing arrival date. Instead, a strong correlation between spring temperatures and population mean arrival date suggests that phenotypic plasticity best explains the advancement of arrival date in our study population. Our study dissects the evolutionary and environmental forces that shape timing traits and thereby increases knowledge of how populations cope with rapidly changing environments. PMID:25847825

  9. Perturbation analysis of queueing systems with a time-varying arrival rate

    NASA Technical Reports Server (NTRS)

    Cassandras, Christos G.; Pan, Jie

    1991-01-01

    The authors consider an M/G/1 queuing with a time-varying arrival rate. The objective is to obtain infinitesimal perturbation analysis (IPA) gradient estimates for various performance measures of interest with respect to certain system parameters. In particular, the authors consider the mean system time over n arrivals and an arrival rate alternating between two values. By choosing a convenient sample path representation of this system, they derive an unbiased IPA gradient estimator which, however, is not consistent, and investigate the nature of this problem.

  10. STS-106 M.S. Lu arrives at KSC for launch

    NASA Technical Reports Server (NTRS)

    2000-01-01

    STS-106 Mission Specialist Edward T. Lu grins upon his arrival at the KSC Shuttle Landing Facility. He and the rest of the crew will be making pre-launch preparations for the fourth flight to the International Space Station. STS-106 is scheduled to launch Sept. 8, 2000, at 8:45 a.m. EDT from Launch Pad 39B. On the 11- day mission, the seven-member crew will perform support tasks on orbit, transfer supplies and prepare the living quarters in the newly arrived Zvezda Service Module. The first long-duration crew, dubbed 'Expedition One,' is due to arrive at the Station in late fall.

  11. Taxi Arrival of Second SR-71 to Dryden

    NASA Technical Reports Server (NTRS)

    1990-01-01

    One of two initial U.S. Air Force SR-71A reconnaissance aircraft that was retired from operational service and loaned to NASA for high-speed research programs taxis in to the ramp on its arrival at NASA's Ames-Dryden Flight Research Facility (later Dryden Flight Research Center), Edwards, California in March 1990. Data from the SR-71 high speed research program will be used to aid designers of future supersonic/hypersonic aircraft and propulsion systems. Two SR-71 aircraft have been used by NASA as testbeds for high-speed and high-altitude aeronautical research. The aircraft, an SR-71A and an SR-71B pilot trainer aircraft, have been based here at NASA's Dryden Flight Research Center, Edwards, California. They were transferred to NASA after the U.S. Air Force program was cancelled. As research platforms, the aircraft can cruise at Mach 3 for more than one hour. For thermal experiments, this can produce heat soak temperatures of over 600 degrees Fahrenheit (F). This operating environment makes these aircraft excellent platforms to carry out research and experiments in a variety of areas -- aerodynamics, propulsion, structures, thermal protection materials, high-speed and high-temperature instrumentation, atmospheric studies, and sonic boom characterization. The SR-71 was used in a program to study ways of reducing sonic booms or over pressures that are heard on the ground, much like sharp thunderclaps, when an aircraft exceeds the speed of sound. Data from this Sonic Boom Mitigation Study could eventually lead to aircraft designs that would reduce the 'peak' overpressures of sonic booms and minimize the startling affect they produce on the ground. One of the first major experiments to be flown in the NASA SR-71 program was a laser air data collection system. It used laser light instead of air pressure to produce airspeed and attitude reference data, such as angle of attack and sideslip, which are normally obtained with small tubes and vanes extending into the

  12. 33 CFR 401.79 - Advance notice of arrival, vessels requiring inspection.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... DEVELOPMENT CORPORATION, DEPARTMENT OF TRANSPORTATION SEAWAY REGULATIONS AND RULES Regulations Information and..., select the following: (i) “CIP 2” as the Arrival Port, (ii) “Foreign to Saint Lawrence Seaway” as...

  13. Sediment sound speed inversion with time-frequency analysis and modal arrival time probability density functions.

    PubMed

    Michalopoulou, Zoi-Heleni; Pole, Andrew

    2016-07-01

    The dispersion pattern of a received signal is critical for understanding physical properties of the propagation medium. The objective of this work is to estimate accurately sediment sound speed using modal arrival times obtained from dispersion curves extracted via time-frequency analysis of acoustic signals. A particle filter is used that estimates probability density functions of modal frequencies arriving at specific times. Employing this information, probability density functions of arrival times for modal frequencies are constructed. Samples of arrival time differences are then obtained and are propagated backwards through an inverse acoustic model. As a result, probability density functions of sediment sound speed are estimated. Maximum a posteriori estimates indicate that inversion is successful. It is also demonstrated that multiple frequency processing offers an advantage over inversion at a single frequency, producing results with reduced variance. PMID:27475202

  14. 19 CFR 123.92 - Electronic information for truck cargo required in advance of arrival.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... HOMELAND SECURITY; DEPARTMENT OF THE TREASURY CUSTOMS RELATIONS WITH CANADA AND MEXICO Advance Information... and arriving at one port from another in the United States after transiting Canada or Mexico (§...

  15. A Fast-Time Study of Aircraft Reordering in Arrival Sequencing and Scheduling

    NASA Technical Reports Server (NTRS)

    Carr, Greg; Neuman, Frank; Tobias, Leonard (Technical Monitor)

    1998-01-01

    In order to ensure that the safe capacity of the terminal area is not exceeded, Air Traffic Management ATM often places restrictions on arriving flights transitioning from en route airspace to terminal airspace. This restriction of arrival traffic is commonly referred to as arrival flow management, and includes techniques such as metering, vectoring, fix-load balancing, and the imposition of miles-in-trail separations. These restrictions are enacted without regard for the relative priority which airlines may be placing on individual flights based on factors such as crew criticality, passenger connectivity, critical turn times, gate availability, on-time performance, fuel status, or runway preference. The development of new arrival flow management techniques which take into consideration priorities expressed by air carriers will likely reduce the economic impact of ATM restrictions on the airlines and lead to increased airline economic efficiency by allowing airlines to have greater control over their individual arrival banks of aircraft. NASA and the Federal Aviation Administration (FAA) have designed and developed a suite of software decision support tools (DSTs) collectively known as the Center TRACON Automation System (CTAS). One of these tools, the Traffic Management Advisor (TMA) is currently being used at the Fort Worth Air Route Traffic Control Center to perform arrival flow management of traffic into the Dallas/Fort Worth airport (DFW). The TMA is a time-based strategic planning tool that assists Traffic Management Coordinators (TMCs) and En Route Air Traffic Controllers in efficiently balancing arrival demand with airport capacity. The primary algorithm in the TMA is a real-time scheduler which generates efficient landing sequences and landing times for arrivals within about 200 no a. from touchdown. This scheduler will sequence aircraft so that they arrive in a first- come - first-served (FCFS) order. While FCFS sequencing establishes a fair order based

  16. 7 CFR 319.40-9 - Inspection and other requirements at port of first arrival.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... regulations under parts 355 and 356 of this chapter and 50 CFR parts 17 and 23. (ii) Has been inspected and..., Lumber, and Other Wood Articles § 319.40-9 Inspection and other requirements at port of first arrival....

  17. 14 CFR 93.27 - Sale and lease of Arrival Authorizations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Reduction at Chicago O'Hare International Airport § 93.27 Sale and lease of Arrival Authorizations. (a) No U... conducts operations at O'Hare solely under the transferring Carrier's marketing control, including...

  18. Determining Direction of Arrival at a Y-Shaped Antenna Array

    NASA Technical Reports Server (NTRS)

    Starr, Stan

    2003-01-01

    An algorithm computes the direction of arrival (both azimuth and elevation angles) of a lightning-induced electromagnetic signal from differences among the times of arrival of the signal at four antennas in a Y-shaped array on the ground. In the original intended application of the algorithm, the baselines of the array are about 90 m long and the array is part of a lightning-detection-and-ranging (LDAR) system. The algorithm and its underlying equations can also be used to compute directions of arrival of impulsive phenomena other than lightning on arrays of sensors other than radio antennas: for example, of an acoustic pulse arriving at an array of microphones.

  19. Arrival time of solar eruptive CMEs associated with ICMEs of magnetic cloud and ejecta

    NASA Astrophysics Data System (ADS)

    Shanmugaraju, A.; Syed Ibrahim, M.; Moon, Y.-J.; Kasro Lourdhina, K.; Dharanya, M.

    2015-05-01

    The Coronal Mass Ejection (CME) is an eruptive event in which magnetic plasma is ejected from the Sun into space through the solar corona. We considered a set of 51 Interplanetary Coronal Mass Ejections (ICMEs) listed by Kim et al. (Solar Phys. 184:77, 2013) from Coordinated Data Analysis Workshop (CDAW, Gopalswamy et al. in Astrophys. J. 710:1111, 2010). Among the 51 events, 22 events are classified as Magnetic Clouds (MC) and 29 events are classified as Ejecta (EJ) where the MC and EJ are subsets of ICMEs. We have analyzed the physical properties of CMEs and ICMEs associated with MC and EJ, and correlated them with the CME's transit time/arrival time from the Sun to the Earth. Main aims of the present study are to examine (a) dependence of transit time on the properties of CMEs and ICMEs, and (b) differences between MC and EJ. It is found that CME's initial speed decides the transit time which is in support of the known results in literature. Apart from this, some important results from the present study are: (i) transit time predicted using an empirical relation obtained in the present work is found comparable with the observations (correlation coefficient=0.70). (ii) The transit time of MC and EJ-associated CMEs ranges from 20 to 120 hours and IP acceleration lies between -10 m/s2 to 5 m/s2. (iii) There are certain differences between MC and EJ such as: (a) Ejecta takes slightly more time to travel and only 30 % of them are accelerated in the interplanetary medium. Whereas, MC takes less time to travel and nearly 50 % of them are accelerated, (b) The correlations of IP acceleration and speed with transit time are higher for MC than that of EJ, (c) A weak relationship between the deflection and transit time is found for MC, but it is absent in the case of EJ and (d) Only EJ-type CMEs have wider range of direction parameter and acceleration. Further, we checked the solar wind speed as another parameter has any influence on CME acceleration and it shows that there

  20. Trio of stellar occultations by Pluto One Year Prior to New Horizons' Arrival

    NASA Astrophysics Data System (ADS)

    Pasachoff, Jay M.; Person, Michael J.; Bosh, Amanda S.; Gulbis, Amanda A. S.; Zuluaga, Carlos A.; Levine, Stephen; Osip, David J.; Schiff, Adam R.; Seeger, Christina H.; Babcock, Bryce A.; Rojo, Patricio; Kosiarek, Molly R.; Servajean, Elise

    2015-01-01

    Our campaign in July 2014 yielded three successful stellar occultations (~m=15, 17, and 18) of Pluto (~m=14), observed from telescopes in New Zealand, Australia, and Chile. Telescopes involved included Chile: Magellan's Clay (6.5 m), SOAR (4.1 m), Carnegie's DuPont (2.4 m); Australia: AAT (4 m); and Canterbury's Mt. John McLellan (1-m); as well as various smaller telescopes in Australia and Chile. One of the events was also observed, with negative results, from GROND on La Silla (2.2 m) and SMARTS's ANDICAM at CTIO (1.3 m). Though our observations were coordinated across continents, each successfully observed event was seen from only one site because of bad weather at the other sites. Two of the events were uniquely observed from Mt. John (Pasachoff et al., DPS 2014) and one, with only Chile sites in the predicted path, from the Clay (Person et al., DPS 2014). This last event was expected to be of the brightest star with the largest telescope we have ever observed for a Pluto occultation, but clouds arrived at the 6.5-m Clay 90 s before the predicted time; a 1% occultation was nonetheless seen and eventually, confirmed by Keck AO observations, to be of a 15th magnitude star previously hidden in the brightness of the 12th mag star. Our scientific conclusion is that as of these observations, one year before New Horizons' passage of Pluto, the atmosphere of Pluto remained robust and of the same size. Details on our analysis of the three events will be presented.Acknowledgments: This work was supported in part by NASA Planetary Astronomy grants to Williams College (NNX12AJ29G) and to MIT (NNX10AB27G), as well as grants from USRA (#8500-98-003) and Ames Research (#NAS2-97-01) to Lowell Observatory. A.R.S. was supported by NSF grant AST-1005024 for the Keck Northeast Astronomy Consortium REU, with partial support from U.S. DoD's ASSURE program. P.R. acknowledges support from FONDECYT through grant 1120299. J.M.P. thanks Andrew Ingersoll and Caltech Planetary Astronomy

  1. Auroral Radio Emission Direction of Arrival Studies of Simultaneous Medium Frequency Burst and Auroral Hiss

    NASA Astrophysics Data System (ADS)

    Broughton, M.; Labelle, J. W.

    2010-12-01

    The auroral zone is the source of multiple kinds of radio emissions that can be observed on the ground. The study of radio emissions offers a way to remotely sense space plasma processes and, in the case of auroral emissions, to use the auroral ionosphere as a large-scale plasma physics laboratory. Medium frequency (MF) burst is an impulsive radio emission at 1.5-4.5 MHz observed on the ground. Its generation mechanism is unknown, and it is often associated with the onset of substorms. Auroral hiss is an impulsive emission observed on the ground at frequencies up to 1 MHz and is also associated with substorm onset. LaBelle et al. [1997] reported a temporal relationship between MF burst and auroral hiss. Multiple impulses of both MF burst and auroral hiss occurred simultaneously over a time period that in certain cases lasted tens of minutes. While the temporal relationship on the timescale of seconds is well established, the spatial relationship between MF burst and auroral hiss has yet to be investigated. Dartmouth College currently operates a broadband (0-5 MHz) four-element radio interferometer at Toolik Field Station in Alaska (68° 38' N, 149° 36' W, 68.5° magnetic latitude) in order to study the direction of arrival (DOA) of radio emissions. Since the antenna spacing is 50 meters, the interferometer is optimized for DOA measurements of MF bursts. However, in certain cases, it can provide the DOA for the high-frequency portion of impulsive auroral hiss. We present two case studies that represent the first simultaneous DOA measurements of impulsive auroral hiss and MF burst. On March 4, 2010, the DOA of MF burst was predominantly from 30 degrees south of east, an observation consistent with the statistical work performed by Bunch et al. [2009]. Simultaneous DOA measurements of the high-frequency portion of auroral hiss also showed the DOA as approximately 30 degrees south of east but with greater scatter in the data. The second case study, which involved an

  2. Climate and the complexity of migratory phenology: sexes, migratory distance, and arrival distributions

    NASA Astrophysics Data System (ADS)

    Macmynowski, Dena P.; Root, Terry L.

    2007-05-01

    The intra- and inter-season complexity of bird migration has received limited attention in climatic change research. Our phenological analysis of 22 species collected in Chicago, USA, (1979 2002) evaluates the relationship between multi-scalar climate variables and differences (1) in arrival timing between sexes, (2) in arrival distributions among species, and (3) between spring and fall migration. The early migratory period for earliest arriving species (i.e., short-distance migrants) and earliest arriving individuals of a species (i.e., males) most frequently correlate with climate variables. Compared to long-distance migrant species, four times as many short-distance migrants correlate with spring temperature, while 8 of 11 (73%) of long-distance migrant species’ arrival is correlated with the North Atlantic Oscillation (NAO). While migratory phenology has been correlated with NAO in Europe, we believe that this is the first documentation of a significant association in North America. Geographically proximate conditions apparently influence migratory timing for short-distance migrants while continental-scale climate (e.g., NAO) seemingly influences the phenology of Neotropical migrants. The preponderance of climate correlations is with the early migratory period, not the median of arrival, suggesting that early spring conditions constrain the onset or rate of migration for some species. The seasonal arrival distribution provides considerable information about migratory passage beyond what is apparent from statistical analyses of phenology. A relationship between climate and fall phenology is not detected at this location. Analysis of the within-season complexity of migration, including multiple metrics of arrival, is essential to detect species’ responses to changing climate as well as evaluate the underlying biological mechanisms.

  3. Arrival-time fluctuations of coherent reflections from surface gravity water waves.

    PubMed

    Badiey, Mohsen; Eickmeier, Justin; Song, Aijun

    2014-05-01

    Arrival time fluctuations of coherent reflections from surface gravity waves are examined. A two-dimensional ray model with an evolving rough sea surface is used to explain the mechanism and formation of the deterministic striation patterns due to the surface reflection. Arrival time predictions from the ray model match qualitatively well with the measurements from bidirectional acoustic transmissions in a water depth of 100 m. PMID:24815293

  4. Does winter region affect spring arrival time and body mass of king eiders in northern Alaska?

    USGS Publications Warehouse

    Powell, Abby N.; Oppel, Steffen

    2009-01-01

    Events during the non-breeding season may affect the body condition of migratory birds and influence performance during the following breeding season. Migratory birds nesting in the Arctic often rely on endogenous nutrients for reproductive efforts, and are thus potentially subject to such carry-over effects. We tested whether king eider (Somateria spectabilis) arrival time and body mass upon arrival at breeding grounds in northern Alaska were affected by their choice of a winter region in the Bering Sea. We captured birds shortly after arrival on breeding grounds in early June 2002–2006 at two sites in northern Alaska and determined the region in which individuals wintered using satellite telemetry or stable isotope ratios of head feathers. We used generalized linear models to assess whether winter region explained variation in arrival body mass among individuals by accounting for sex, site, annual variation, and the date a bird was captured. We found no support for our hypothesis that either arrival time or arrival body mass of king eiders differed among winter regions. We conclude that wintering in different regions in the Bering Sea is unlikely to have reproductive consequences for king eiders in our study areas.

  5. Size speed bias or size arrival effect-How judgments of vehicles' approach speed and time to arrival are influenced by the vehicles' size.

    PubMed

    Petzoldt, Tibor

    2016-10-01

    Crashes at railway level crossings are a key problem for railway operations. It has been suggested that a potential explanation for such crashes might lie in a so-called size speed bias, which describes the phenomenon that observers underestimate the speed of larger objects, such as aircraft or trains. While there is some evidence that this size speed bias indeed exists, it is somewhat at odds with another well researched phenomenon, the size arrival effect. When asked to judge the time it takes an approaching object to arrive at a predefined position (time to arrival, TTA), observers tend to provide lower estimates for larger objects. In that case, road users' crossing decisions when confronted with larger vehicles should be rather conservative, which has been confirmed in multiple studies on gap acceptance. The aim of the experiment reported in this paper was to clarify the relationship between size speed bias and size arrival effect. Employing a relative judgment task, both speed and TTA estimates were assessed for virtual depictions of a train and a truck, using a car as a reference to compare against. The results confirmed the size speed bias for the speed judgments, with both train and truck being perceived as travelling slower than the car. A comparable bias was also present in the TTA estimates for the truck. In contrast, no size arrival effect could be found for the train or the truck, neither in the speed nor the TTA judgments. This finding is inconsistent with the fact that crossing behaviour when confronted with larger vehicles appears to be consistently more conservative. This discrepancy might be interpreted as an indication that factors other than perceived speed or TTA play an important role for the differences in gap acceptance between different types of vehicles. PMID:27428866

  6. On Connections Between Weather Types and the Arrival of Migratory Birds in Estonia

    NASA Astrophysics Data System (ADS)

    Sepp, M.; Päädam, K.; Palm, V.; Leito, A.

    2010-09-01

    Migration is one of the most energy-consuming activities in the lives of birds. The timing must be such that flying would not be overly strenuous and that there would be favourable conditions for feeding and nesting available at arrival. The wide year-to-year variation in the arrival dates of migratory birds suggests that birds are able to both accelerate and delay their migration according to the weather conditions in the destination area. Often, the arrival date cannot be explained by the average daily temperature or any other single meteorological parameter. Relatively simple tools for exploring the links between climate and wildlife are weather types that combine most of the meteorological variables. The aim of the present work is to study the connections between the arrival of migratory birds in Estonia and the weather types. We examine the weather types that most frequently occurred on those days when birds arrived in Tartu (located in the Eastern part of Estonian mainland) and in Kuressaare (West-Estonian archipelago). For this purpose, the arrival dates of 42 species of migratory birds were analysed and compared to the weather types of 73 classifications generated by COST 733 action (COST 733 catalogue 1.2). Since the weather type classifications were generated using ERA40 air pressure datasets, the period available for analysis is 1958-2002. We selected weather types that occurred on the arrival dates of each migratory bird species. Also, the data on two days prior to the arrival were analysed. We assume that birds "took the decision" to fly to Estonia due to the weather conditions on those two days. Frequency of the selected weather types was analysed and compared to the long term frequency of these types during the spring season (MAM). We assume that birds "prefer" those weather types whose frequency on migration days exceeds their long-term frequency. Similarly, we studied the weather types that birds seem to avoid. The results show that despite the

  7. An Analysis of the Relationship Between the Heat Index and Arrivals in the Emergency Department

    PubMed Central

    Levy, Matthew; Broccoli, Morgan; Cole, Gai; Jenkins, J Lee; Klein, Eili Y.

    2015-01-01

    Background: Heatwaves are one of the most deadly weather-related events in the United States and account for more deaths annually than hurricanes, tornadoes, floods, and earthquakes combined. However, there are few statistically rigorous studies of the effect of heatwaves on emergency department (ED) arrivals. A better understanding of this relationship can help hospitals plan better and provide better care for patients during these types of events. Methods: A retrospective review of all ED patient arrivals that occurred from April 15 through August 15 for the years 2008 through 2013 was performed. Daily patient arrival data were combined with weather data (temperature and humidity) to examine the potential relationships between the heat index and ED arrivals as well as the length of time patients spend in the ED using generalized additive models. In particular the effect the 2012 heat wave that swept across the United States, and which was hypothesized to increase arrivals was examined. Results: While there was no relationship found between the heat index and arrivals on a single day, a non-linear relationship was found between the mean three-day heat index and the number of daily arrivals. As the mean three-day heat index initially increased, the number of arrivals significantly declined. However, as the heat index continued to increase, the number of arrivals increased. It was estimated that there was approximately a 2% increase in arrivals when the mean heat index for three days approached 100°F. This relationship was strongest for adults aged 18-64, as well as for patients arriving with lower acuity. Additionally, a positive relationship was noted between the mean three-day heat index and the length of stay (LOS) for patients in the ED, but no relationship was found for the time from which a patient was first seen to when a disposition decision was made. No significant relationship was found for the effect of the 2012 heat wave on ED arrivals, though it

  8. EFFECTS OF REFRACTION ON ANGLES AND TIMES OF ARRIVAL OF SOLAR RADIO BURSTS

    SciTech Connect

    Thejappa, G.; MacDowall, R. J.; Gopalswamy, N. E-mail: Robert.MacDowall@nasa.gov

    2011-06-10

    Solar type III and type II radio bursts suffer severe bending and group delay due to refraction while escaping from the source where the refractive index {mu} can be as low as {approx}0 to the observer where {mu} {approx} 1. These propagation effects can manifest themselves as errors in the observed directions and times of arrival at the telescope. We describe a ray-tracing technique that can be used to estimate these errors. By applying this technique to the spherically symmetric density model derived using the data from the WIND/Waves experiment, we show that (1) the fundamental and harmonic emissions escape the solar atmosphere in narrow cones (at 625 kHz the widths of these escape cones are {approx}1.{sup 0}1 and {approx}8{sup 0}, respectively), (2) the errors in the angles as well as the times of arrival increase monotonically with the angle of arrival (at 625 kHz these errors are 0.{sup 0}26 and {approx}17.2 s for the fundamental and {approx}0.{sup 0}52 and {approx}7.6 s for the harmonic at the maximum possible angles of arrival of {approx}0.{sup 0}55 and {approx}4{sup 0}, respectively), and (3) the lower the frequencies are, the higher the errors in both the angles and times of arrival are. This implies that at 625 kHz the measured arrival angles and arrival times of the fundamental and harmonic are off by {approx}50% and {approx}13%, and {approx}3.4% and {approx}1.5%, respectively.

  9. Modelling the arrival of invasive organisms via the international marine shipping network: a Khapra beetle study.

    PubMed

    Paini, Dean R; Yemshanov, Denys

    2012-01-01

    Species can sometimes spread significant distances beyond their natural dispersal ability by anthropogenic means. International shipping routes and the transport of shipping containers, in particular are a commonly recognised pathway for the introduction of invasive species. Species can gain access to a shipping container and remain inside, hidden and undetected for long periods. Currently, government biosecurity agencies charged with intercepting and removing these invasive species when they arrive to a county's border only assess the most immediate point of loading in evaluating a shipping container's risk profile. However, an invasive species could have infested a container previous to this point and travelled undetected before arriving at the border. To assess arrival risk for an invasive species requires analysing the international shipping network in order to identify the most likely source countries and the domestic ports of entry where the species is likely to arrive. We analysed an international shipping network and generated pathway simulations using a first-order Markov chain model to identify possible source ports and countries for the arrival of Khapra beetle (Trogoderma granarium) to Australia. We found Kaohsiung (Taiwan) and Busan (Republic of Korea) to be the most likely sources for Khapra beetle arrival, while the port of Melbourne was the most likely point of entry to Australia. Sensitivity analysis revealed significant stability in the rankings of foreign and Australian ports. This methodology provides a reliable modelling tool to identify and rank possible sources for an invasive species that could arrive at some time in the future. Such model outputs can be used by biosecurity agencies concerned with inspecting incoming shipping containers and wishing to optimise their inspection protocols. PMID:22970258

  10. Modelling the Arrival of Invasive Organisms via the International Marine Shipping Network: A Khapra Beetle Study

    PubMed Central

    Paini, Dean R.; Yemshanov, Denys

    2012-01-01

    Species can sometimes spread significant distances beyond their natural dispersal ability by anthropogenic means. International shipping routes and the transport of shipping containers, in particular are a commonly recognised pathway for the introduction of invasive species. Species can gain access to a shipping container and remain inside, hidden and undetected for long periods. Currently, government biosecurity agencies charged with intercepting and removing these invasive species when they arrive to a county’s border only assess the most immediate point of loading in evaluating a shipping container’s risk profile. However, an invasive species could have infested a container previous to this point and travelled undetected before arriving at the border. To assess arrival risk for an invasive species requires analysing the international shipping network in order to identify the most likely source countries and the domestic ports of entry where the species is likely to arrive. We analysed an international shipping network and generated pathway simulations using a first-order Markov chain model to identify possible source ports and countries for the arrival of Khapra beetle (Trogoderma granarium) to Australia. We found Kaohsiung (Taiwan) and Busan (Republic of Korea) to be the most likely sources for Khapra beetle arrival, while the port of Melbourne was the most likely point of entry to Australia. Sensitivity analysis revealed significant stability in the rankings of foreign and Australian ports. This methodology provides a reliable modelling tool to identify and rank possible sources for an invasive species that could arrive at some time in the future. Such model outputs can be used by biosecurity agencies concerned with inspecting incoming shipping containers and wishing to optimise their inspection protocols. PMID:22970258

  11. ElEvoHI - Improving CME arrival predictions using heliospheric imaging

    NASA Astrophysics Data System (ADS)

    Rollett, Tanja; Möstl, Christian; Isavnin, Alexey; Kubicka, Manuel; Amerstorfer, Ute; Davies, Jackie; Harrison, Richard

    2016-04-01

    The STEREO mission has sampled a tremendous amount of data, which have served as a basis to develop a lot of new methods to analyze the dynamics of coronal mass ejections (CMEs) during their journey through interplanetary space. The STEREO heliospheric imagers (HI) in particular are unsurpassed in their contribution to a deeper understanding of how CMEs are influenced by interaction with the solar wind and other CMEs and how they evolve in the inner heliosphere. Although STEREO is currently not well observing the space between the Sun and Earth, the large data repository of HI observations enables us to further improve the prediction of CME arrival times and speeds using HI observations - particularly with regard to a potential future L5 mission. We present a new method for predicting arrival times and speeds of CMEs at any location in the inner heliosphere: ElEvoHI. This new approach uses HI observations as input and assumes an elliptic CME front shape. The solar wind influence is taken into account by fitting the observations using the drag-based model. In this way, it is possible to gain all parameters needed as input for the Ellipse Evolution model (ElEvo), which is then used to predict the CME arrival. To demonstrate the applicability of ElEvoHI we present the forecasts for 20 CMEs remotely observed by STEREO/HI and compare the forecasts to their in situ arrival times and speeds at 1 AU. Compared to the widely used Fixed-φ fitting method, ElEvoHI improves the arrival time forecast by 2.2 hours to ±6.5 hours and the arrival speed forecast by 260 km s‑1 to ±55 km s‑1. In particular, the remarkable improvement of the arrival speed prediction is crucial for predicting geomagnetic storm strength on Earth.

  12. Jupiter's Thermal Structure on the Eve of Juno's Arrival and an NEB Expansion Event

    NASA Astrophysics Data System (ADS)

    Fletcher, Leigh N.; Orton, Glenn S.; Greathouse, Thomas K.; Sinclair, James; Giles, Rohini; Irwin, Patrick; Rogers, John; Encrenaz, Therese

    2016-04-01

    We report on a continuing program of ground-based thermal-infrared imaging spectroscopy to explore variability in Jupiter's atmospheric temperatures, winds, clouds and composition in support of the NASA/Juno mission, scheduled to arrive at Jupiter in July 2016. Observations during the 2015/16 apparition, centred on opposition on March 8th 2016, will be presented from NASA's Infrared Telescope Facility (IRTF) and ESO's Very Large Telescope (VLT) as part of a world-wide campaign to characterise the Jovian atmosphere to support Juno. Thermal and chemical contrasts, combined with the visible-light record from the amateur community, show that Jupiter's North Equatorial Belt (NEB) is presently expanding northwards. The combination of thermal and visible observations will allow us to determine the environmental conditions underlying this belt/zone variability. Radiometrically calibrated spectral scan maps of Jupiter have been regularly obtained using the TEXES instrument (Texas Echelon cross Echelle Spectrograph, Lacy et al. 2002, PASP 114, p153-168) on the IRTF since 2012, and observations are planned in January and April 2016. Ten settings between 5 and 25 μm (10-20 cm-1 wide settings at spectral resolutions of 2000-10000) were selected to be sensitive to jovian temperatures (via H2, CH4 and CH3D), tropospheric phosphine and ammonia, tropospheric haze opacity and stratospheric hydrocarbons ethane and acetylene. These will be supplemented by photometric imaging from the VLT/VISIR instrument (Lagage et al., 2004, Messenger 117, p12-16) in ten narrow-band filters to determine temperatures associated with discrete phenomena (vortices, plumes, waves) at higher diffraction-limited spatial resolution. Spectra and images are inverted via the NEMESIS retrieval algorithm (Irwin et al., 2008, JSQRT 109, p1136-1150) to map temperatures at multiple altitudes (1-600 mbar), winds, aerosol opacity and gaseous composition. Our most recent observations (November 2015) revealed (i) a

  13. Changes in the timing of departure and arrival of Irish migrant waterbirds

    PubMed Central

    Geyer, Heather; Yu, Rong

    2015-01-01

    There have been many recent reports across Europe and North America of a change in the timing of arrival and departure of a range of migrant bird species to their breeding grounds. These studies have focused primarily on passerine birds and climate warming has been found to be one of the main drivers of earlier arrival and departure in spring. In Ireland, rising spring temperature has been shown to result in the earlier arrival of sub-Saharan passerine species and the early departure of the Whooper Swan. In order to investigate changes in spring arrival and departure dates of waterbirds to Ireland, we extracted latest dates as an indicator of the timing of departure of winter visitors (24 species) and earliest dates as an indicator of the timing of arrival of spring/summer migrants (2 species) from BirdWatch Ireland’s East Coast Bird reports (1980–2003). Three of the winter visitors showed evidence of later departure and one of earlier departure whereas one of the spring/summer visitors showed evidence of earlier arrival. In order to determine any influence of local temperature on these trends, we analysed data from two synoptic weather stations within the study area and found that spring (average February, March and April) air temperature significantly (P < 0.05) increased at a rate of 0.03 °C per year, which was strongly correlated with changes in latest and earliest records. We also tested the sensitivity of bird departure/arrival to temperature and found that Northern Pintail would leave 10 days earlier in response to a 1 °C increase in spring temperature. In addition, we investigated the impact of a large-scale circulation pattern, the North Atlantic Oscillation (NAO), on the timing of arrival and departure which correlated with both advances and delays in departure and arrival. We conclude that the impact of climate change on earliest and latest records of these birds is, as expected, species specific and that local temperature had less of an influence

  14. Changes in the timing of departure and arrival of Irish migrant waterbirds.

    PubMed

    Donnelly, Alison; Geyer, Heather; Yu, Rong

    2015-01-01

    There have been many recent reports across Europe and North America of a change in the timing of arrival and departure of a range of migrant bird species to their breeding grounds. These studies have focused primarily on passerine birds and climate warming has been found to be one of the main drivers of earlier arrival and departure in spring. In Ireland, rising spring temperature has been shown to result in the earlier arrival of sub-Saharan passerine species and the early departure of the Whooper Swan. In order to investigate changes in spring arrival and departure dates of waterbirds to Ireland, we extracted latest dates as an indicator of the timing of departure of winter visitors (24 species) and earliest dates as an indicator of the timing of arrival of spring/summer migrants (2 species) from BirdWatch Ireland's East Coast Bird reports (1980-2003). Three of the winter visitors showed evidence of later departure and one of earlier departure whereas one of the spring/summer visitors showed evidence of earlier arrival. In order to determine any influence of local temperature on these trends, we analysed data from two synoptic weather stations within the study area and found that spring (average February, March and April) air temperature significantly (P < 0.05) increased at a rate of 0.03 °C per year, which was strongly correlated with changes in latest and earliest records. We also tested the sensitivity of bird departure/arrival to temperature and found that Northern Pintail would leave 10 days earlier in response to a 1 °C increase in spring temperature. In addition, we investigated the impact of a large-scale circulation pattern, the North Atlantic Oscillation (NAO), on the timing of arrival and departure which correlated with both advances and delays in departure and arrival. We conclude that the impact of climate change on earliest and latest records of these birds is, as expected, species specific and that local temperature had less of an influence than

  15. Feasibility Criteria for Interval Management Operations as Part of Arrival Management Operations

    NASA Technical Reports Server (NTRS)

    Levitt, Ian M.; Weitz, Lesley A.; Barmore, Bryan E.; Castle, Michael W.

    2014-01-01

    Interval Management (IM) is a future airborne spacing concept that aims to provide more precise inter-aircraft spacing to yield throughput improvements and greater use of fuel efficient trajectories for arrival and approach operations. To participate in an IM operation, an aircraft must be equipped with avionics that provide speeds to achieve and maintain an assigned spacing interval relative to another aircraft. It is not expected that all aircraft will be equipped with the necessary avionics, but rather that IM fits into a larger arrival management concept developed to support the broader mixed-equipage environment. Arrival management concepts are comprised of three parts: a ground-based sequencing and scheduling function to develop an overall arrival strategy, ground-based tools to support the management of aircraft to that schedule, and the IM tools necessary for the IM operation (i.e., ground-based set-up, initiation, and monitoring, and the flight-deck tools to conduct the IM operation). The Federal Aviation Administration is deploying a near-term ground-automation system to support metering operations in the National Airspace System, which falls within the first two components of the arrival management concept. This paper develops a methodology for determining the required delivery precision at controlled meter points for aircraft that are being managed to a schedule and aircraft being managed to a relative spacing interval in order to achieve desired flow rates and adequate separation at the meter points.

  16. Cancellation of spurious arrivals in Green's function extraction and the generalized optical theorem

    USGS Publications Warehouse

    Snieder, R.; Van Wijk, K.; Haney, M.; Calvert, R.

    2008-01-01

    The extraction of the Green's function by cross correlation of waves recorded at two receivers nowadays finds much application. We show that for an arbitrary small scatterer, the cross terms of scattered waves give an unphysical wave with an arrival time that is independent of the source position. This constitutes an apparent inconsistency because theory predicts that such spurious arrivals do not arise, after integration over a complete source aperture. This puzzling inconsistency can be resolved for an arbitrary scatterer by integrating the contribution of all sources in the stationary phase approximation to show that the stationary phase contributions to the source integral cancel the spurious arrival by virtue of the generalized optical theorem. This work constitutes an alternative derivation of this theorem. When the source aperture is incomplete, the spurious arrival is not canceled and could be misinterpreted to be part of the Green's function. We give an example of how spurious arrivals provide information about the medium complementary to that given by the direct and scattered waves; the spurious waves can thus potentially be used to better constrain the medium. ?? 2008 The American Physical Society.

  17. Multipath Separation-Direction of Arrival (MS-DOA) with Genetic Search Algorithm for HF channels

    NASA Astrophysics Data System (ADS)

    Arikan, Feza; Koroglu, Ozan; Fidan, Serdar; Arikan, Orhan; Guldogan, Mehmet B.

    2009-09-01

    Direction-of-Arrival (DOA) defines the estimation of arrival angles of an electromagnetic wave impinging on a set of sensors. For dispersive and time-varying HF channels, where the propagating wave also suffers from the multipath phenomena, estimation of DOA is a very challenging problem. Multipath Separation-Direction of Arrival (MS-DOA), that is developed to estimate both the arrival angles in elevation and azimuth and the incoming signals at the output of the reference antenna with very high accuracy, proves itself as a strong alternative in DOA estimation for HF channels. In MS-DOA, a linear system of equations is formed using the coefficients of the basis vector for the array output vector, the incoming signal vector and the array manifold. The angles of arrival in elevation and azimuth are obtained as the maximizers of the sum of the magnitude squares of the projection of the signal coefficients on the column space of the array manifold. In this study, alternative Genetic Search Algorithms (GA) for the maximizers of the projection sum are investigated using simulated and experimental ionospheric channel data. It is observed that GA combined with MS-DOA is a powerful alternative in online DOA estimation and can be further developed according to the channel characteristics of a specific HF link.

  18. Adherence to ARRIVE Guidelines in Chinese Journal Reports on Neoplasms in Animals

    PubMed Central

    Liu, Yali; Zhao, Xingxing; Mai, Yuefen; Li, Xinxin; Wang, Jin; Chen, Lili; Mu, Jing; Jin, Gengxue; Gou, Hongping; Sun, Wanting; Feng, Yuchen

    2016-01-01

    Background The Animals in Research: Reporting In Vivo Experiments (ARRIVE) guidelines were published in 2010 with the aim of improving the quality of studies involving animals. However, how well Chinese studies involving animal neoplasms adhere to these guidelines has not been assessed. Objective To evaluate the reporting quality of such experiments published between 2010 and 2012 in Chinese journals with support from the National Natural Science Foundation of China. Methods We searched the Chinese Science Citation and Chinese Journal Full-Text Databases for articles published between 2010 and 2012 involving neoplasms in animals. The data were extracted into pre-prepared forms. Reporting quality was assessed using the ARRIVE checklist—39 items plus information on blinding. Results Three hundred and ninety-six animal studies were included in the analysis: 127 studies published in 2010, 140 studies published in 2011, and 129 studies published in 2012. The range of ARRIVE score is from 12 to 27 with a maximum possible score of 40. Studies published in 2012 (P = 0.012), 2011 (P = 0.015), 2010, July~Dec (P<0.017) had a significantly larger ARRIVE checklist score than those published in Jan.~June, 2010, respectively. Conclusions Experiments involving neoplasms in animals published in Chinese journals generally have not comprehensively reported the information recommended by the ARRIVE guidelines. We strongly recommend that researchers conducting such studies report this information. PMID:27182788

  19. Predator density and timing of arrival affect reef fish community assembly.

    PubMed

    Stier, Adrian C; Geange, Shane W; Hanson, Kate M; Bolker, Benjamin M

    2013-05-01

    Most empirical studies of predation use simple experimental approaches to quantify the effects of predators on prey (e.g., using constant densities of predators, such as ambient vs. zero). However, predator densities vary in time, and these effects may not be well represented by studies that use constant predator densities. Although studies have independently examined the importance of predator density, temporal variability, and timing of arrival (i.e., early or late relative to prey), the relative contribution of these different predator regimes on prey abundance, diversity, and composition remains poorly understood. The hawkfish (Paracirrhites arcatus), a carnivorous coral reef fish, exhibits substantial variability in patch occupancy, density, and timing of arrival to natural reefs. Our field experiments demonstrated that effects of hawkfish on prey abundance depended on both hawkfish density and the timing of their arrival, but not on variability in hawkfish density. Relative to treatments without hawkfish, hawkfish presence reduced prey abundance by 50%. This effect increased with a doubling of hawkfish density (an additional 33% reduction), and when hawkfish arrived later during community development (a 34% reduction). Hawkfish did not affect within-patch diversity (species richness), but they increased between-patch diversity (beta) based on species incidence (22%), and caused shifts in species composition. Our results suggest that the timing of predator arrival can be as important as predator density in modifying prey abundance and community composition. PMID:23858646

  20. Al Composites

    NASA Astrophysics Data System (ADS)

    Chandanayaka, Tharaka; Azarmi, Fardad

    2014-05-01

    In the present study, cold spraying technique was used to fabricate a metal matrix composite (MMC) that consists of Ni matrix and 20 vol.% Ni3Al particles at two different particle sizes as reinforcement. This study intends to investigate the effect of reinforcement particle size on microstructural and mechanical properties of cold sprayed MMCs. Two different Ni3Al powders with nominal particle size of -45 to +5 and +45 to 100 μm were used as reinforcement in this study. Cold sprayed Ni-Ni3Al samples were subjected to the microstructural observation and characterization prior to any mechanical testing. Then, samples were tested using nano-indentation, Knoop hardness, Vickers hardness, and Resonance frequency to evaluate their mechanical properties. No significant changes were observed in microstructural characteristics due to different particle sizes. The results obtained from a variety of mechanical testings indicated that the increasing reinforcement particle size resulted in the slight reduction of mechanical properties such as elastic modulus and hardness in cold sprayed MMCs. The mechanical interlock between deposited particles defines the bonding strength in cold sprayed samples. Small size particles have a higher velocity and impact resulting in stronger interlock between deformed particles.

  1. Effects of a Longer Detection Window in VHF Time-of-Arrival Lightning Detection Systems

    NASA Astrophysics Data System (ADS)

    Murphy, M.; Holle, R.; Demetriades, N.

    2003-12-01

    Lightning detection systems that operate by measuring the times of arrival (TOA) of short bursts of radiation at VHF can produce huge volumes of data. The first automated system of this kind, the NASA Kennedy Space Center LDAR network, is capable of producing one detection every 100 usec from each of seven sensors (Lennon and Maier, 1991), where each detection consists of the time and amplitude of the highest-amplitude peak observed within the 100 usec window. More modern systems have been shown to produce very detailed information with one detection every 10 usec (Rison et al., 2001). Operating such systems in real time, however, can become expensive because of the large data communications rates required. One solution to this problem is to use a longer detection window, say 500 usec. In principle, this has little or no effect on the flash detection efficiency because each flash typically produces a very large number of these VHF bursts (known as sources). By simply taking the largest-amplitude peak from every 500-usec interval instead of every 100-usec interval, we should detect the largest 20{%} of the sources that would have been detected using the 100-usec window. However, questions remain about the exact effect of a longer detection window on the source detection efficiency with distance from the network, its effects on how well flashes are represented in space, and how well the reduced information represents the parent thunderstorm. The latter issue is relevant for automated location and tracking of thunderstorm cells using data from VHF TOA lightning detection networks, as well as for understanding relationships between lightning and severe weather. References Lennon, C.L. and L.M. Maier, Lightning mapping system. Proceedings, Intl. Aerospace and Ground Conf. on Lightning and Static Elec., Cocoa Beach, Fla., NASA Conf. Pub. 3106, vol. II, pp. 89-1 - 89-10, 1991. Rison, W., P. Krehbiel, R. Thomas, T. Hamlin, J. Harlin, High time resolution lightning mapping

  2. AL Amyloidosis

    PubMed Central

    2012-01-01

    Definition of the disease AL amyloidosis results from extra-cellular deposition of fibril-forming monoclonal immunoglobulin (Ig) light chains (LC) (most commonly of lambda isotype) usually secreted by a small plasma cell clone. Most patients have evidence of isolated monoclonal gammopathy or smoldering myeloma, and the occurrence of AL amyloidosis in patients with symptomatic multiple myeloma or other B-cell lymphoproliferative disorders is unusual. The key event in the development of AL amyloidosis is the change in the secondary or tertiary structure of an abnormal monoclonal LC, which results in instable conformation. This conformational change is responsible for abnormal folding of the LC, rich in β leaves, which assemble into monomers that stack together to form amyloid fibrils. Epidemiology AL amyloidosis is the most common type of systemic amyloidois in developed countries with an estimated incidence of 9 cases/million inhabitant/year. The average age of diagnosed patients is 65 years and less than 10% of patients are under 50. Clinical description The clinical presentation is protean, because of the wide number of tissues or organs that may be affected. The most common presenting symptoms are asthenia and dyspnoea, which are poorly specific and may account for delayed diagnosis. Renal manifestations are the most frequent, affecting two thirds of patients at presentation. They are characterized by heavy proteinuria, with nephrotic syndrome and impaired renal function in half of the patients. Heart involvement, which is present at diagnosis in more than 50% of patients, leading to restrictive cardiopathy, is the most serious complication and engages prognosis. Diagnostic methods The diagnosis relies on pathological examination of an involved site showing Congo red-positive amyloid deposits, with typical apple-green birefringence under polarized light, that stain positive with an anti-LC antibody by immunohistochemistry and/or immunofluorescence. Due to the

  3. Laser warning receiver to identify the wavelength and angle of arrival of incident laser light

    DOEpatents

    Sinclair; Michael B.; Sweatt, William C.

    2010-03-23

    A laser warning receiver is disclosed which has up to hundreds of individual optical channels each optically oriented to receive laser light from a different angle of arrival. Each optical channel has an optical wedge to define the angle of arrival, and a lens to focus the laser light onto a multi-wavelength photodetector for that channel. Each multi-wavelength photodetector has a number of semiconductor layers which are located in a multi-dielectric stack that concentrates the laser light into one of the semiconductor layers according to wavelength. An electrical signal from the multi-wavelength photodetector can be processed to determine both the angle of arrival and the wavelength of the laser light.

  4. A conflict analysis of 4D descent strategies in a metered, multiple-arrival route environment

    NASA Technical Reports Server (NTRS)

    Izumi, K. H.; Harris, C. S.

    1990-01-01

    A conflict analysis was performed on multiple arrival traffic at a typical metered airport. The Flow Management Evaluation Model (FMEM) was used to simulate arrival operations using Denver Stapleton's arrival route structure. Sensitivities of conflict performance to three different 4-D descent strategies (clear-idle Mach/Constant AirSpeed (CAS), constant descent angle Mach/CAS and energy optimal) were examined for three traffic mixes represented by those found at Denver Stapleton, John F. Kennedy and typical en route metering (ERM) airports. The Monte Carlo technique was used to generate simulation entry point times. Analysis results indicate that the clean-idle descent strategy offers the best compromise in overall performance. Performance measures primarily include susceptibility to conflict and conflict severity. Fuel usage performance is extrapolated from previous descent strategy studies.

  5. Operator-normalized quantum arrival times in the presence of interactions

    SciTech Connect

    Hegerfeldt, G.C.; Seidel, D.; Muga, J.G.; Navarro, B.

    2004-07-01

    We model ideal arrival-time measurements for free quantum particles and for particles subject to an external interaction by means of a narrow and weak absorbing potential. This approach is related to the operational approach of measuring the first photon emitted from a two-level atom illuminated by a laser. By operator normalizing the resulting time-of-arrival distribution, a distribution is obtained which for freely moving particles not only recovers the axiomatically derived distribution of Kijowski for states with purely positive momenta but is also applicable to general momentum components. For particles interacting with a square barrier the mean arrival time and corresponding 'tunneling time' obtained at the transmission side of the barrier become independent of the barrier width (Hartman effect) for arbitrarily wide barriers, i.e., without the transition to the ultraopaque, classical-like regime dominated by wave packet components above the barrier.

  6. Marrying after arriving: The role of individuals' networks for immigrant choice of partner's origin.

    PubMed

    del Rey Poveda, Alberto; Vono de Vilhena, Daniela

    2014-03-01

    This paper analyses the impact of social networks on the transition to marriage among recently arrived, single, immigrants in Spain. Our hypothesis states that the existence of individual networks at the moment of arrival strongly influences partner selection. Using the 2007 Spanish National Immigration Survey we apply competing risk models to estimate the likelihood of endogamous or exogamous marriage, for men and women separately. The analysis shows that among immigrant men and women, the presence of relatives or friends from their home-country at the time of arrival increases the probability of marriage to a co-national. Correspondingly, immigrants who obtained Spanish citizenship before migrating present higher chances of intermarriage, as they are likely to have more contact with the host society. PMID:24796876

  7. Improvements of the shock arrival times at the Earth model STOA

    NASA Astrophysics Data System (ADS)

    Liu, H.

    2015-12-01

    Prediction of the shocks' arrival times (SATs) at the Earthis very important for space weather forecast. There is a well-known SAT model,STOA, which is widely used in the space weather forecast. However, the shocktransit time from STOA model usually has a relative large error comparedto the real measurements. In addition, STOA tends to yield too much 'yes'prediction, which causes a large number of false alarms. Therefore, in thiswork, we work on the modification of STOA model. First, we give a new methodto calculate the shock transit time by modifying the way to use the solar windspeed in STOA model. Second, we develop new criteria for deciding whetherthe shock will arrive at the Earth with the help of the sunspot numbers andthe angle distances of the flare events. It is shown that our work can improvethe SATs prediction significantly, especially the prediction of flare events with-out shocks arriving at the Earth.

  8. Multi-Mode Lamb Wave Arrival Time Extraction for Improved Tomographic Reconstruction

    SciTech Connect

    Hinders, Mark K.; Hou Jidong; Leonard, Kevin R.

    2005-04-09

    An ultrasonic signal processing technique is applied to multi-mode arrival time estimation from Lamb waveforms. The basic tool is a simplified time-scale projection called a dynamic wavelet fingerprint (DWFP) which enables direct observation of the variation of features of interest in non-stationary ultrasonic signals. The DWFP technique was used to automatically detect and evaluate each candidate through-transmitted Lamb mode. The area of the dynamic wavelet fingerprint was then used as a feature to distinguish false modes caused by noise and other interference from the true modes of interest. The set of estimated arrival times were then used as inputs for tomographic reconstruction. The Lamb wave tomography images generated with these estimated arrival times were able to indicate different defects in aluminum plates.

  9. The mental health of unaccompanied refugee minors on arrival in the host country.

    PubMed

    Vervliet, Marianne; Meyer Demott, Melinda A; Jakobsen, Marianne; Broekaert, Eric; Heir, Trond; Derluyn, Ilse

    2014-02-01

    Despite increasing numbers of unaccompanied refugee minors (UM) in Europe and heightened concerns for this group, research on their mental health has seldom included the factor "time since arrival." As a result, our knowledge of the mental health statuses of UM at specific points in time and over periods in their resettlement trajectories in European host countries is limited. This study therefore examined the mental health of UM shortly after their arrival in Norway (n = 204) and Belgium (n = 103) through the use of self-report questionnaires (HSCL-37A, SLE, RATS, HTQ). High prevalence scores of anxiety, depression and posttraumatic stress disorder (PTSD) symptoms were found. In addition, particular associations were found with the number of traumatic events the UM reported. The results indicate that all UM have high support needs on arrival in the host country. Longitudinal studies following up patterns of continuity and change in their mental health during their trajectories in the host country are necessary. PMID:25130065

  10. Scaling Behavior of the First Arrival Time of a Random-Walking Magnetic Domain

    NASA Astrophysics Data System (ADS)

    Im, M.-Y.; Lee, S.-H.; Kim, D.-H.; Fischer, P.; Shin, S.-C.

    2008-04-01

    We report a universal scaling behavior of the first arrival time of a traveling magnetic domain wall into a finite space-time observation window of a magneto-optical microscope enabling direct visualization of a Barkhausen avalanche in real time. The first arrival time of the traveling magnetic domain wall exhibits a nontrivial fluctuation and its statistical distribution is described by universal power-law scaling with scaling exponents of 1.34±0.07 for CoCr and CoCrPt films, despite their quite different domain evolution patterns. Numerical simulation of the first arrival time with an assumption that the magnetic domain wall traveled as a random walker well matches our experimentally observed scaling behavior, providing an experimental support for the random-walking model of traveling magnetic domain walls.

  11. Scaling behavior of the first arrival time of a random-walking magnetic domain.

    PubMed

    Im, M-Y; Lee, S-H; Kim, D-H; Fischer, P; Shin, S-C

    2008-04-25

    We report a universal scaling behavior of the first arrival time of a traveling magnetic domain wall into a finite space-time observation window of a magneto-optical microscope enabling direct visualization of a Barkhausen avalanche in real time. The first arrival time of the traveling magnetic domain wall exhibits a nontrivial fluctuation and its statistical distribution is described by universal power-law scaling with scaling exponents of 1.34+/-0.07 for CoCr and CoCrPt films, despite their quite different domain evolution patterns. Numerical simulation of the first arrival time with an assumption that the magnetic domain wall traveled as a random walker well matches our experimentally observed scaling behavior, providing an experimental support for the random-walking model of traveling magnetic domain walls. PMID:18518241

  12. Scaling Behavior of the First Arrival Time of a Random-Walking Magnetic Domain

    SciTech Connect

    Im, M.-Y.; Lee, S.-H.; Kim, D.-H.; Fischer, P.; Shin, S.-C.

    2008-02-04

    We report a universal scaling behavior of the first arrival time of a traveling magnetic domain wall into a finite space-time observation window of a magneto-optical microscope enabling direct visualization of a Barkhausen avalanche in real time. The first arrival time of the traveling magnetic domain wall exhibits a nontrivial fluctuation and its statistical distribution is described by universal power-law scaling with scaling exponents of 1.34 {+-} 0.07 for CoCr and CoCrPt films, despite their quite different domain evolution patterns. Numerical simulation of the first arrival time with an assumption that the magnetic domain wall traveled as a random walker well matches our experimentally observed scaling behavior, providing an experimental support for the random-walking model of traveling magnetic domain walls.

  13. Traveltime estimation of first arrivals and later phases using the modified graph method for a crustal structure analysis

    NASA Astrophysics Data System (ADS)

    Kubota, Ryuji; Nishiyama, Eiichiro; Murase, Kei; Kasahara, Junzo

    2009-02-01

    The interpretation of observed waveform characteristics identified in refraction and wide-angle reflection data increases confidence in the crustal structure model obtained. When calculating traveltimes and raypaths, wavefront methods on a regular grid based on graph theory are robust even with complicated structures, but basically compute only first arrivals. In this paper, we develop new algorithms to compute traveltimes and raypaths not only for first arrivals, but also for fast and later reflection arrivals, later refraction arrivals, and converted waves between P and S, using the modified wavefront method based on slowness network nodes mapped on a multi-layer model. Using the new algorithm, we can interpret reflected arrivals, Pg-later arrivals, strong arrivals appearing behind Pn, triplicated Moho reflected arrivals (PmP) to obtain the shape of the Moho, and phases involving conversion between P and S. Using two models of an ocean-continent transition zone and an oceanic ridge or seamount, we show the usefulness of this algorithm, which is confirmed by synthetic seismograms using the 2D Finite Difference Method (2D-FDM). Characteristics of arrivals and raypaths of the two models differ from each other in that using only first-arrival traveltime data for crustal structure analysis involves risk of erroneous interpretation in the ocean-continent transition zone, or the region around a ridge or seamount.

  14. Spread-Spectrum VLF Observations at Arrival Heights, Antarctica During Solar X-Ray Flares

    NASA Astrophysics Data System (ADS)

    Wang, T.; Moore, R. C.; Fraser-Smith, A. C.

    2010-12-01

    It is well known that subionospherically-propagating very low frequency (VLF) signals are sensitive to the ionospheric effects of solar flares. It has been documented since the 1960's that the typical X-ray flare affects the phase of the VLF signal (known as a sudden phase anomaly, or SPA), but a sudden change in both the amplitude and the phase of the narrowband VLF signal may be produced during a C-class or stronger emission. Previous research has studied event onset times, growth rates, and recovery times, for example. In January 2010, the ELF/VLF radiometer at Arrival Heights (which was installed in 1984) was upgraded to continually record both the extremely low frequency (ELF) and the very low frequency (VLF) bands. This upgrade additionally provided the first real-time signal processing of narrowband VLF transmitter signals at Arrival Heights. Since that time, near-real-time amplitude and phase summary charts of subionospherically-propagating narrowband VLF signals recorded at Arrival Heights have been posted to the Internet, updated once per minute. Observations of sudden amplitude and phase anomalies were observed in this data stream on 12 June 2010 and on 7 August 2010, and the full resolution broadband data sets were downloaded at that time, demonstrating the scientific utility of the receiver upgrade providing near-real-time data access. In this paper, we demonstrate a new spread-spectrum analysis technique to analyze the sudden anomalies observed at Arrival Heights as a function of frequency. The 200-Hz bandwidth of the narrowband VLF signal is fully utilized to analyze the effect of these events on VLF propagation as a function of frequency within the band. Events were observed at Arrival Heights using the NAA (24.0 kHz, Cutler, Maine) and NLK (24.8 kHz, Jim Creek, Washington) transmitter signals, and to our knowledge, these are the first narrowband VLF events recorded at Arrival Heights to be analyzed.

  15. Disclosing hidden information in the quantum Zeno effect: Pulsed measurement of the quantum time of arrival

    NASA Astrophysics Data System (ADS)

    Echanobe, J.; Del Campo, A.; Muga, J. G.

    2008-03-01

    Repeated measurements of a quantum particle to check its presence in a region of space was proposed long ago [G. R. Allcock, Ann. Phys. 53, 286 (1969)] as a natural way to determine the distribution of times of arrival at the orthogonal subspace, but the method was discarded because of the quantum Zeno effect: in the limit of very frequent measurements the wave function is reflected and remains in the original subspace. We show that by normalizing the small bits of arriving (removed) norm, an ideal time distribution emerges in correspondence with a classical local-kinetic-energy distribution.

  16. STS-90 P.S. James Pawelczyk and Cmdr Richard Searfoss arrive at KSC

    NASA Technical Reports Server (NTRS)

    1998-01-01

    STS-90 Payload Specialist James Pawelczyk, Ph.D. (at left), shakes the hand of KSC Director Roy Bridges as STS-90 Commander Richard Searfoss looks on shortly after the crew's arrival at Kennedy Space Center's Shuttle Landing Facility. The crew arrived to prepare for the launch of Columbia, scheduled for April 16 at 2:19 p.m. EDT from KSC's Launch Pad 39B. The launch of Neurolab on STS-90, which will be the second mission of 1998, is scheduled to last nearly 17 days.

  17. Time-of-Arrival Lightning Location Retrieval Using an Oblate Spheroidal Earth Model

    NASA Technical Reports Server (NTRS)

    Solakiewicz, Richard

    1999-01-01

    The problem of retrieving lightning ground strike location on an oblate spheroidal Earth using a network of 4 or more time-of-arrival sensors is considered. A recently developed analytic method for obtaining such retrievals on a spherical Earth surface is perturbed resulting in an iterative procedure to get correction terms. The perturbation procedure consists of applying a vector Newton's method to eqs. relating the distances from the lightning location to each sensor along a geodesic and the times of arrival of the wave produced by the lightning source at each sensor.

  18. Comparison of the CME-associated shock arrival times at the earth using the WSA-ENLIL model with three cone models

    NASA Astrophysics Data System (ADS)

    Jang, S.; Moon, Y.; Na, H.

    2012-12-01

    We have made a comparison of CME-associated shock arrival times at the earth based on the WSA-ENLIL model with three cone models using 29 halo CMEs from 2001 to 2002. These halo CMEs have cone model parameters from Michalek et al. (2007) as well as their associated interplanetary (IP) shocks. For this study we consider three different cone models (an asymmetric cone model, an ice-cream cone model and an elliptical cone model) to determine CME cone parameters (radial velocity, angular width and source location), which are used for input parameters of the WSA-ENLIL model. The mean absolute error (MAE) of the arrival times for the elliptical cone model is 10 hours, which is about 2 hours smaller than those of the other models. However, this value is still larger than that (8.7 hours) of an empirical model by Kim et al. (2007). We are investigating several possibilities on relatively large errors of the WSA-ENLIL cone model, which may be caused by CME-CME interaction, background solar wind speed, and/or CME density enhancement.

  19. 8 CFR 286.2 - Fee for arrival of passengers aboard commercial aircraft or commercial vessels.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... SECURITY IMMIGRATION REGULATIONS IMMIGRATION USER FEE § 286.2 Fee for arrival of passengers aboard..., per individual is charged and collected by the Commissioner for the immigration inspection of each... Act, per individual, is charged and collected by the Commissioner for the immigration inspection at...

  20. 8 CFR 286.2 - Fee for arrival of passengers aboard commercial aircraft or commercial vessels.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... SECURITY IMMIGRATION REGULATIONS IMMIGRATION USER FEE § 286.2 Fee for arrival of passengers aboard..., per individual is charged and collected by the Commissioner for the immigration inspection of each... Act, per individual, is charged and collected by the Commissioner for the immigration inspection at...

  1. 8 CFR 286.2 - Fee for arrival of passengers aboard commercial aircraft or commercial vessels.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... SECURITY IMMIGRATION REGULATIONS IMMIGRATION USER FEE § 286.2 Fee for arrival of passengers aboard..., per individual is charged and collected by the Commissioner for the immigration inspection of each... Act, per individual, is charged and collected by the Commissioner for the immigration inspection at...

  2. 8 CFR 286.2 - Fee for arrival of passengers aboard commercial aircraft or commercial vessels.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... SECURITY IMMIGRATION REGULATIONS IMMIGRATION USER FEE § 286.2 Fee for arrival of passengers aboard..., per individual is charged and collected by the Commissioner for the immigration inspection of each... Act, per individual, is charged and collected by the Commissioner for the immigration inspection at...

  3. 8 CFR 286.2 - Fee for arrival of passengers aboard commercial aircraft or commercial vessels.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... SECURITY IMMIGRATION REGULATIONS IMMIGRATION USER FEE § 286.2 Fee for arrival of passengers aboard..., per individual is charged and collected by the Commissioner for the immigration inspection of each... Act, per individual, is charged and collected by the Commissioner for the immigration inspection at...

  4. 33 CFR 401.79 - Advance notice of arrival, vessels requiring inspection.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Advance notice of arrival, vessels requiring inspection. 401.79 Section 401.79 Navigation and Navigable Waters SAINT LAWRENCE SEAWAY DEVELOPMENT CORPORATION, DEPARTMENT OF TRANSPORTATION SEAWAY REGULATIONS AND RULES Regulations Information and Reports § 401.79 Advance notice...

  5. 7 CFR 319.40-9 - Inspection and other requirements at port of first arrival.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... of this chapter, or to Endangered Species Act regulations under parts 355 and 356 of this chapter and 50 CFR parts 17 and 23. (ii) Has been inspected and the inspector requires reinspection, cleaning, or... unloaded; and the name of the importer or broker at the port of arrival. 5 A list of APHIS Officers...

  6. 19 CFR 141.58 - Single entry for separately arriving portions of unassembled or disassembled entities.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... for payment at such time pursuant to the Automated Clearinghouse procedures (see 19 CFR 24.25). (h..., due to its size or nature, be shipped on a single conveyance, and is thus imported in an unassembled... (4) Involves the first portion and all succeeding portions arriving at the same United States port...

  7. 19 CFR 141.58 - Single entry for separately arriving portions of unassembled or disassembled entities.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 2 2012-04-01 2012-04-01 false Single entry for separately arriving portions of unassembled or disassembled entities. 141.58 Section 141.58 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) ENTRY OF MERCHANDISE Quantity of Merchandise To Be Included in...

  8. 19 CFR 141.58 - Single entry for separately arriving portions of unassembled or disassembled entities.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... for payment at such time pursuant to the Automated Clearinghouse procedures (see 19 CFR 24.25). (h..., due to its size or nature, be shipped on a single conveyance, and is thus imported in an unassembled... (4) Involves the first portion and all succeeding portions arriving at the same United States port...

  9. Continuous measurement of the arrival times of x-ray photon sequence.

    PubMed

    Yan, Qiurong; Zhao, Baosheng; Sheng, Lizhi; Liu, Yong'an

    2011-05-01

    In order to record x-ray pulse profile for x-ray pulsar-based navigation and timing, this paper presents a continuous, high-precision method for measuring arrival times of photon sequence with a common starting point. In this method, a high stability atomic clock is counted to measure the coarse time of arrival photon. A high resolution time-to-digital converter is used to measure the fine time of arrival photon. The coarse times and the fine times are recorded continuously and then transferred to computer memory by way of memory switch. The pulse profile is obtained by a special data processing method. A special circuit was developed and a low-level x-ray pulse profile measurement experiment system was setup. The arrival times of x-ray photon sequence can be consecutively recorded with a time resolution of 500 ps and the profile of x-ray pulse was constructed. The data also can be used for analysis by many other methods, such as statistical distribution of photon events per time interval, statistical distribution of time interval between two photon events, photon counting histogram, autocorrelation and higher order autocorrelation. PMID:21639490

  10. An Exploratory Investigation of Diffused Point Arrival Time and Source Credibility.

    ERIC Educational Resources Information Center

    Baxter, Leslie A.; Ward, Jean M.

    Because much conjecture (but limited empirical research) exists about the nonverbal variable to time, this exploratory study investigated the effects of differential arrival times on four dimensions of source credibility: sociability, dynamism, competence, and composure. Subjects were 84 educational secretaries with a mean age of 49 years. Each…

  11. 7 CFR 319.41-4 - Notice of arrival by permittee.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 5 2010-01-01 2010-01-01 false Notice of arrival by permittee. 319.41-4 Section 319.41-4 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Indian Corn or Maize, Broomcorn,...

  12. 7 CFR 319.41-4 - Notice of arrival by permittee.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 5 2011-01-01 2011-01-01 false Notice of arrival by permittee. 319.41-4 Section 319.41-4 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Indian Corn or Maize, Broomcorn,...

  13. Analysis of delay reducing and fuel saving sequencing and spacing algorithms for arrival traffic

    NASA Technical Reports Server (NTRS)

    Neuman, Frank; Erzberger, Heinz

    1991-01-01

    The air traffic control subsystem that performs sequencing and spacing is discussed. The function of the sequencing and spacing algorithms is to automatically plan the most efficient landing order and to assign optimally spaced landing times to all arrivals. Several algorithms are described and their statistical performance is examined. Sequencing brings order to an arrival sequence for aircraft. First-come-first-served sequencing (FCFS) establishes a fair order, based on estimated times of arrival, and determines proper separations. Because of the randomness of the arriving traffic, gaps will remain in the sequence of aircraft. Delays are reduced by time-advancing the leading aircraft of each group while still preserving the FCFS order. Tightly spaced groups of aircraft remain with a mix of heavy and large aircraft. Spacing requirements differ for different types of aircraft trailing each other. Traffic is reordered slightly to take advantage of this spacing criterion, thus shortening the groups and reducing average delays. For heavy traffic, delays for different traffic samples vary widely, even when the same set of statistical parameters is used to produce each sample. This report supersedes NASA TM-102795 on the same subject. It includes a new method of time-advance as well as an efficient method of sequencing and spacing for two dependent runways.

  14. Latent Tuberculosis Infection Among Immigrant and Refugee Children Arriving in the United States: 2010.

    PubMed

    Taylor, Eboni M; Painter, John; Posey, Drew L; Zhou, Weigong; Shetty, Sharmila

    2016-10-01

    Immigrants and refugees age 2-14 years entering the United States from countries with estimated tuberculosis (TB) incidence rate ≥20 per 100,000 population are screened for TB. Children with TB disease are treated before US arrival. Children with positive tuberculin skin tests (TST), but negative TB evaluation during their pre-immigration examination, are classified with latent TB infection (LTBI) and are recommended for re-evaluation post-arrival. We examined post-immigration TB evaluation and therapy for children arriving with LTBI. We reviewed medical exam data from immigrant children with medical conditions and all refugee children arriving during 2010. Medical examination data were available for 67,334 children. Of these, 8231 (12 %) had LTBI pre-immigration; 5749 (70 %) were re-evaluated for TB post-immigration, and 64 % were retested by TST or IGRA. The pre-immigration LTBI diagnosis was changed for 38 % when retested by TST and for 71 % retested by IGRA. Estimated LTBI therapy initiation and completion rates were 68 and 12 %. In this population, testing with IGRA may limit the number of children targeted for therapy. Increased pre-immigration TB screening with post-immigration follow-up evaluation leading to completion of LTBI therapy should be encouraged to prevent TB reactivation. PMID:26364054

  15. Continuous measurement of the arrival times of x-ray photon sequence

    SciTech Connect

    Yan Qiurong; Sheng Lizhi; Zhao Baosheng; Liu Yong'an

    2011-05-15

    In order to record x-ray pulse profile for x-ray pulsar-based navigation and timing, this paper presents a continuous, high-precision method for measuring arrival times of photon sequence with a common starting point. In this method, a high stability atomic clock is counted to measure the coarse time of arrival photon. A high resolution time-to-digital converter is used to measure the fine time of arrival photon. The coarse times and the fine times are recorded continuously and then transferred to computer memory by way of memory switch. The pulse profile is obtained by a special data processing method. A special circuit was developed and a low-level x-ray pulse profile measurement experiment system was setup. The arrival times of x-ray photon sequence can be consecutively recorded with a time resolution of 500 ps and the profile of x-ray pulse was constructed. The data also can be used for analysis by many other methods, such as statistical distribution of photon events per time interval, statistical distribution of time interval between two photon events, photon counting histogram, autocorrelation and higher order autocorrelation.

  16. 7 CFR 319.41-4 - Notice of arrival by permittee.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 5 2012-01-01 2012-01-01 false Notice of arrival by permittee. 319.41-4 Section 319.41-4 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Indian Corn or Maize, Broomcorn,...

  17. 7 CFR 319.41-4 - Notice of arrival by permittee.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 5 2013-01-01 2013-01-01 false Notice of arrival by permittee. 319.41-4 Section 319.41-4 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Indian Corn or Maize, Broomcorn,...

  18. 7 CFR 319.41-4 - Notice of arrival by permittee.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 5 2014-01-01 2014-01-01 false Notice of arrival by permittee. 319.41-4 Section 319.41-4 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Indian Corn or Maize, Broomcorn,...

  19. Self-Esteem: A Comparison between Hong Kong Children and Newly Arrived Chinese Children

    ERIC Educational Resources Information Center

    Chan, Yiu Man; Chan, Christine Mei-Sheung

    2004-01-01

    The Self-esteem Inventory developed by Coopersmith (1967) was used to measure the self-esteem of 387 Chinese children. The sample included newly arrived mainland Chinese children and Hong Kong children. The results showed significant statistical differences when measuring the self-esteem level associated with the length of their stay in Hong Kong…

  20. Apollo 14 crew arrive at White Room atop Pad A, Launch Complex 39

    NASA Technical Reports Server (NTRS)

    1971-01-01

    The three Apollo 14 astronauts arrive at the White Room atop Pad A, Launch Complex 39, during the Apollo 14 prelaunch countdown. Note identifying red bands on the sleeve and leg of Shepard. Standing in the center background is Astronaut Thomas P. Stafford, Chief of the Manned Spacecraft Center Astronaut Office.

  1. Evaluation of the Terminal Sequencing and Spacing System for Performance Based Navigation Arrivals

    NASA Technical Reports Server (NTRS)

    Thipphavong, Jane; Jung, Jaewoo; Swenson, Harry N.; Martin, Lynne; Lin, Melody; Nguyen, Jimmy

    2013-01-01

    NASA has developed the Terminal Sequencing and Spacing (TSS) system, a suite of advanced arrival management technologies combining timebased scheduling and controller precision spacing tools. TSS is a ground-based controller automation tool that facilitates sequencing and merging arrivals that have both current standard ATC routes and terminal Performance-Based Navigation (PBN) routes, especially during highly congested demand periods. In collaboration with the FAA and MITRE's Center for Advanced Aviation System Development (CAASD), TSS system performance was evaluated in human-in-the-loop (HITL) simulations with currently active controllers as participants. Traffic scenarios had mixed Area Navigation (RNAV) and Required Navigation Performance (RNP) equipage, where the more advanced RNP-equipped aircraft had preferential treatment with a shorter approach option. Simulation results indicate the TSS system achieved benefits by enabling PBN, while maintaining high throughput rates-10% above baseline demand levels. Flight path predictability improved, where path deviation was reduced by 2 NM on average and variance in the downwind leg length was 75% less. Arrivals flew more fuel-efficient descents for longer, spending an average of 39 seconds less in step-down level altitude segments. Self-reported controller workload was reduced, with statistically significant differences at the p less than 0.01 level. The RNP-equipped arrivals were also able to more frequently capitalize on the benefits of being "Best-Equipped, Best- Served" (BEBS), where less vectoring was needed and nearly all RNP approaches were conducted without interruption.

  2. Fallout-particle-trajectory computations and fallout-particle arrival time calculations

    SciTech Connect

    Quinn, V.E.; Kennedy, N.C.

    1989-09-01

    This report describes the Weather Service Nuclear Support Office (WSNSO) procedure for deriving estimates of fallout-particle arrival times along a fallout pattern. Analyses of meteorological data are discussed. The equations and calculations used in deriving particle-sedimentation velocities and times in layers are discussed. 17 refs., 21 figs., 6 tabs.

  3. Acculturation of Late-Arriving Refugees: A New Job for Adult Educators.

    ERIC Educational Resources Information Center

    Smith, Kathleen A.

    Late-arriving Laotian refugees to the United States who are Yao Tribal mountain people face complex problems in adapting in Western culture and therefore pose perplexing problems for adult educators. Some of the dramatic adjustment difficulties center around the following areas of concern: (1) health and sanitation (normal body functions,…

  4. 7 CFR 319.55-5 - Notice of arrival by permittee.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 5 2014-01-01 2014-01-01 false Notice of arrival by permittee. 319.55-5 Section 319.55-5 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Rice Rules and Regulations §...

  5. 7 CFR 319.55-5 - Notice of arrival by permittee.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 5 2013-01-01 2013-01-01 false Notice of arrival by permittee. 319.55-5 Section 319.55-5 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Rice Rules and Regulations §...

  6. 7 CFR 319.55-6 - Inspection and disinfection at port of arrival.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Rice Rules and Regulations § 319.55-6 Inspection and disinfection at port of arrival. (a) Paddy rice. All importations of seed or paddy rice from Mexico shall be subject, as a condition of entry, to such inspection...

  7. 7 CFR 319.55-5 - Notice of arrival by permittee.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 5 2012-01-01 2012-01-01 false Notice of arrival by permittee. 319.55-5 Section 319.55-5 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Rice Rules and Regulations §...

  8. 7 CFR 319.55-6 - Inspection and disinfection at port of arrival.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Rice Rules and Regulations § 319.55-6 Inspection and disinfection at port of arrival. (a) Paddy rice. All importations of seed or paddy rice from Mexico shall be subject, as a condition of entry, to such inspection...

  9. 7 CFR 319.55-6 - Inspection and disinfection at port of arrival.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Rice Rules and Regulations § 319.55-6 Inspection and disinfection at port of arrival. (a) Paddy rice. All importations of seed or paddy rice from Mexico shall be subject, as a condition of entry, to such inspection...

  10. Adolescent Sport, Recreation and Physical Education: Experiences of Recent Arrivals to Canada

    ERIC Educational Resources Information Center

    Taylor, Tracy; Doherty, Alison

    2005-01-01

    This paper explores the perceived benefits and challenges of sport, recreation and physical education participation of culturally diverse adolescent girls and boys who are recent arrivals to Canada. The aim of the research was to further our understanding of the attitudes and experiences of English as a second language (ESL) students. Following…

  11. Reading without Words: Using the Arrival to Teach Visual Literacy with English Language Learners

    ERIC Educational Resources Information Center

    Mathews, Sarah A.

    2014-01-01

    This article highlights the use of Shaun Tan's "The Arrival" to teach literacy to English Language Learners in social studies classrooms. The featured text is a book that displays the complexity of migration within a text that does not feature a single written word. The author describes a variety of mini-lessons geared towards…

  12. On the Borders: The Arrival of Irregular Immigrants in Malta--Some Implications for Education

    ERIC Educational Resources Information Center

    Mercieca, Duncan

    2007-01-01

    This paper concerns the issue of the continual arrival of irregular immigrants in Malta and the problems that ensue. The view generally held is that we need to respond to the needs of irregular immigrants by providing services. However, with reference to some of Jacques Derrida's ideas, I argue in this paper that the "other"/immigrant is not there…

  13. 7 CFR 319.55-5 - Notice of arrival by permittee.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 5 2010-01-01 2010-01-01 false Notice of arrival by permittee. 319.55-5 Section 319.55-5 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Rice Rules and Regulations §...

  14. 7 CFR 319.55-5 - Notice of arrival by permittee.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 5 2011-01-01 2011-01-01 false Notice of arrival by permittee. 319.55-5 Section 319.55-5 Agriculture Regulations of the Department of Agriculture (Continued) ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Rice Rules and Regulations §...

  15. 7 CFR 319.55-6 - Inspection and disinfection at port of arrival.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Rice Rules and Regulations § 319.55-6 Inspection and disinfection at port of arrival. (a) Paddy rice. All importations of seed or paddy rice from Mexico shall be subject, as a condition of entry, to such inspection...

  16. 7 CFR 319.55-6 - Inspection and disinfection at port of arrival.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE FOREIGN QUARANTINE NOTICES Rice Rules and Regulations § 319.55-6 Inspection and disinfection at port of arrival. (a) Paddy rice. All importations of seed or paddy rice from Mexico shall be subject, as a condition of entry, to such inspection...

  17. Louse-borne relapsing fever in a refugee from Somalia arriving in Belgium.

    PubMed

    Darcis, Gilles; Hayette, Marie-Pierre; Bontems, Sebastien; Sauvage, Anne-Sophie; Meuris, Christelle; Van Esbroeck, Marjan; Leonard, Philippe

    2016-03-01

    We report a case of louse-borne relapsing fever (LBRF) in a refugee from Somalia who had arrived in Belgium a few days earlier. He complained of myalgia and secondarily presented fever. Blood smears revealed spirochetes later identified as Borrelia recurrentis. LBRF should be considered in countries hosting refugees, particularly those who transit through endemic regions. PMID:27356309

  18. Leaky modes and the first arrivals in cased boreholes with poorly bonded conditions

    NASA Astrophysics Data System (ADS)

    Zhang, XiuMei; Wang, XiuMing; Zhang, HaiLan

    2016-02-01

    The generation mechanism of the first arrivals in the cased boreholes for the poorly bonded conditions is investigated. Based on the analyses of the Riemann surface structure of the characteristic function, the dispersion features, excitation spectra and contributions of modes excited in the cased boreholes with different cementing types are studied. The phase velocity dispersion studies of leaky modes show that high-order modes form "plateau" regions with one approximate velocity denoted by v separated by their cutoff frequencies, in which the phase velocity changes little with a considerable frequency range, while the group velocity keeps a relatively constant high value. Usually, the operation frequency range of a specific cementing evaluation acoustic logging tool is covered by such a "plateau" region. Mode excitation and contribution analyses show that the first arrivals in the cased boreholes for the poorly bonded conditions are the contributions from leaky modes, where the traveling velocity of the first arrivals processed by slowness time coherence (STC) method is equal to the approximated velocity v. Analyses on generation of leaky modes in the cased boreholes supplement the understanding of the generation mechanism of the first arrivals.

  19. The Lack of Motor Vehicle Occupant Restraint Use in Children Arriving at School

    ERIC Educational Resources Information Center

    Emery, Kathryn D.; Faries, S. Glenn

    2008-01-01

    Background: Motor vehicle crashes are the leading cause of mortality for children aged 4-14 in the United States. Many children are driven daily to school, increasing their exposure to potential injury, especially if they are not appropriately restrained. Observing the level of motor vehicle occupant restraint (MVOR) use upon school arrival could…

  20. PBF Reactor Building (PER620). Reactor vessel arrives from gate city ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    PBF Reactor Building (PER-620). Reactor vessel arrives from gate city steel at door of PBF. On flatbed, it is too high to fit under door. Photographer: Larry Page. Date: February 13, 1970. INEEL negative no. 70-737 - Idaho National Engineering Laboratory, SPERT-I & Power Burst Facility Area, Scoville, Butte County, ID

  1. LOFT. Reactor arrives at containment building (TAN650), now being pushed ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    LOFT. Reactor arrives at containment building (TAN-650), now being pushed by locomotive. Camera facing northerly. Note "Hello Dolly" and "PWR MTA No. 1" (pressurized water reactor mobile test assembly) signs. Date: 1973. INEEL negative no. 73-3710 - Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

  2. Optimal Time Advance In Terminal Area Arrivals: Throughput vs. Fuel Savings

    NASA Technical Reports Server (NTRS)

    Sadovsky, Alexander V .; Swenson, Harry N.; Haskell, William B.; Rakas, Jasenka

    2011-01-01

    The current operational practice in scheduling air traffic arriving at an airport is to adjust flight schedules by delay, i.e. a postponement of an aircrafts arrival at a scheduled location, to manage safely the FAA-mandated separation constraints between aircraft. To meet the observed and forecast growth in traffic demand, however, the practice of time advance (speeding up an aircraft toward a scheduled location) is envisioned for future operations as a practice additional to delay. Time advance has two potential advantages. The first is the capability to minimize, or at least reduce, the excess separation (the distances between pairs of aircraft immediately in-trail) and thereby to increase the throughput of the arriving traffic. The second is to reduce the total traffic delay when the traffic sample is below saturation density. A cost associated with time advance is the fuel expenditure required by an aircraft to speed up. We present an optimal control model of air traffic arriving in a terminal area and solve it using the Pontryagin Maximum Principle. The admissible controls allow time advance, as well as delay, some of the way. The cost function reflects the trade-off between minimizing two competing objectives: excess separation (negatively correlated with throughput) and fuel burn. A number of instances are solved using three different methods, to demonstrate consistency of solutions.

  3. Mother's Age at Arrival in the United States and Early Cognitive Development

    ERIC Educational Resources Information Center

    Glick, Jennifer E.; Bates, Littisha; Yabiku, Scott T.

    2009-01-01

    This paper focuses on the cognitive development of young children from diverse backgrounds with a particular focus on ethnic and nativity differences in home environments. Hypotheses are developed addressing the extent to which home environment and parenting practices mediate the relationship between mother's age at arrival and cognitive…

  4. Teaching World Geography to Late-Arrival Immigrant Students: Highlighting Practice and Content

    ERIC Educational Resources Information Center

    Salinas, Cinthia; Franquiz, Maria E.; Reidel, Michelle

    2008-01-01

    In this case study, the work of an exemplary high school social studies teacher is highlighted. In her class, late-arrival immigrant students participated in oral, writing, and demonstration activities as they learned the physical, cultural, and historical traditions of geography education. As newcomers to the English language, the students'…

  5. Atlas booster which will lift Astronaut L. Gordon Cooper into space arrives at Cape Canaveral, Fla.

    NASA Technical Reports Server (NTRS)

    1963-01-01

    The Atlas vehicle 130D which will lift Astronaut L. Gordon Cooper into space arrives at Cape Canaveral, Fla. The launch vehicle is a one-and-a-half stage, liquid propellant launch vehicle with five engines: 2 booster engines, 1 sustainer engine, and 2 small vernier engines. These engines produce a total thrust of approximately 360,000 pounds.

  6. Modeling mixed retention and early arrivals in multidimensional heterogeneous media using an explicit Lagrangian scheme

    NASA Astrophysics Data System (ADS)

    Zhang, Yong; Meerschaert, Mark M.; Baeumer, Boris; LaBolle, Eric M.

    2015-08-01

    This study develops an explicit two-step Lagrangian scheme based on the renewal-reward process to capture transient anomalous diffusion with mixed retention and early arrivals in multidimensional media. The resulting 3-D anomalous transport simulator provides a flexible platform for modeling transport. The first step explicitly models retention due to mass exchange between one mobile zone and any number of parallel immobile zones. The mobile component of the renewal process can be calculated as either an exponential random variable or a preassigned time step, and the subsequent random immobile time follows a Hyper-exponential distribution for finite immobile zones or a tempered stable distribution for infinite immobile zones with an exponentially tempered power-law memory function. The second step describes well-documented early arrivals which can follow streamlines due to mechanical dispersion using the method of subordination to regional flow. Applicability and implementation of the Lagrangian solver are further checked against transport observed in various media. Results show that, although the time-nonlocal model parameters are predictable for transport with retention in alluvial settings, the standard time-nonlocal model cannot capture early arrivals. Retention and early arrivals observed in porous and fractured media can be efficiently modeled by our Lagrangian solver, allowing anomalous transport to be incorporated into 2-D/3-D models with irregular flow fields. Extensions of the particle-tracking approach are also discussed for transport with parameters conditioned on local aquifer properties, as required by transient flow and nonstationary media.

  7. 33 CFR 401.79 - Advance notice of arrival, vessels requiring inspection.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Advance notice of arrival, vessels requiring inspection. 401.79 Section 401.79 Navigation and Navigable Waters SAINT LAWRENCE SEAWAY DEVELOPMENT CORPORATION, DEPARTMENT OF TRANSPORTATION SEAWAY REGULATIONS AND RULES Regulations Information...

  8. Maximum Likelihood Time-of-Arrival Estimation of Optical Pulses via Photon-Counting Photodetectors

    NASA Technical Reports Server (NTRS)

    Erkmen, Baris I.; Moision, Bruce E.

    2010-01-01

    Many optical imaging, ranging, and communications systems rely on the estimation of the arrival time of an optical pulse. Recently, such systems have been increasingly employing photon-counting photodetector technology, which changes the statistics of the observed photocurrent. This requires time-of-arrival estimators to be developed and their performances characterized. The statistics of the output of an ideal photodetector, which are well modeled as a Poisson point process, were considered. An analytical model was developed for the mean-square error of the maximum likelihood (ML) estimator, demonstrating two phenomena that cause deviations from the minimum achievable error at low signal power. An approximation was derived to the threshold at which the ML estimator essentially fails to provide better than a random guess of the pulse arrival time. Comparing the analytic model performance predictions to those obtained via simulations, it was verified that the model accurately predicts the ML performance over all regimes considered. There is little prior art that attempts to understand the fundamental limitations to time-of-arrival estimation from Poisson statistics. This work establishes both a simple mathematical description of the error behavior, and the associated physical processes that yield this behavior. Previous work on mean-square error characterization for ML estimators has predominantly focused on additive Gaussian noise. This work demonstrates that the discrete nature of the Poisson noise process leads to a distinctly different error behavior.

  9. Crew of Gemini 10 arrive aboard the recovery ship U.S.S. Guadalcanal

    NASA Technical Reports Server (NTRS)

    1966-01-01

    Crew of Gemini 10 space flight, Astronauts John W. Young (left) and Michael Collins (right), arrive aboard the recovery ship U.S.S. Guadalcanal. Greeting them are Ben James, Senior NASA Public Affairs Officer aboard ship and John C. Stonesifer, Manned Spacecraft Center (MSC) Landing and Recovery Division.

  10. 19 CFR 141.58 - Single entry for separately arriving portions of unassembled or disassembled entities.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 2 2011-04-01 2011-04-01 false Single entry for separately arriving portions of unassembled or disassembled entities. 141.58 Section 141.58 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) ENTRY OF MERCHANDISE Quantity of Merchandise To Be Included in...

  11. Improvements of the shock arrival times at the Earth model STOA

    NASA Astrophysics Data System (ADS)

    Liu, H.-L.; Qin, G.

    2015-07-01

    Prediction of the shocks' arrival times (SATs) at the Earth is very important for space weather forecast. There is a well-known SAT model, Shock Time of Arrival (STOA), which is widely used in the space weather forecast. However, the shock transit time from STOA model usually has a relative large error compared to the real measurements. In addition, STOA tends to yield too much "yes" prediction, which causes a large number of false alarms. Therefore, in this work, we work on the modification of STOA model. First, we give a new method to calculate the shock transit time by modifying the way to use the solar wind speed in STOA model. Second, we develop new criteria for deciding whether the shock will arrive at the Earth with the help of the sunspot numbers and the angle distances of the flare events. It is shown that our work can improve the SATs prediction significantly, especially the prediction of flare events without shocks arriving at the Earth.

  12. 77 FR 6704 - Exemptions From Entry Requirements and Report of Arrival Requirements for Certain Department of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-09

    ...Certain vessels and aircraft owned or chartered by the Department of Defense (DoD) are exempt from entry requirements and, in some cases, reporting requirements upon their arrival in the United States from a foreign place. This rule proposes to expand those exemptions to include additional DoD-owned or chartered vessels and aircraft when transporting certain cargo or...

  13. 75 FR 59617 - Notification of Arrival in U.S. Ports; Certain Dangerous Cargoes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-28

    ... Security FR Federal Register NOA Notice of arrival NPRM Notice of proposed rulemaking OMB Office of....S. Ports; Certain Dangerous Cargoes; Electronic Submission'' (70 FR 74663). That interim rule adopted the definition of certain dangerous cargo (CDC), which a 2004 temporary final rule (69 FR...

  14. Bilingual Vocabulary Knowledge and Arrival Age among Japanese Heritage Language Students at "Hoshuukoo"

    ERIC Educational Resources Information Center

    Mori, Yoshiko; Calder, Toshiko M.

    2013-01-01

    This study examines bilingual vocabulary knowledge in relation to arrival age among first language (L1) Japanese students attending "hoshuukoo" (i.e., supplementary academic schools for Japanese-speaking children) in the United States. It also examines the relationship between L1 Japanese and English as a second language (L2), as…

  15. 19 CFR 122.48a - Electronic information for air cargo required in advance of arrival.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Electronic information for air cargo required in advance of arrival. 122.48a Section 122.48a Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Aircraft Entry and Entry Documents; Electronic Manifest...

  16. 14 CFR 93.26 - Reversion and withdrawal of Arrival Authorizations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Reduction at Chicago O'Hare International Airport § 93.26 Reversion and withdrawal of Arrival Authorizations... automatically to the FAA 30 days after the Carrier has ceased all operations at O'Hare for any reason other than... operations at O'Hare. (d) The FAA shall not withdraw or temporarily suspend under paragraph (b) any...

  17. 14 CFR 93.26 - Reversion and withdrawal of Arrival Authorizations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Reduction at Chicago O'Hare International Airport § 93.26 Reversion and withdrawal of Arrival Authorizations... automatically to the FAA 30 days after the Carrier has ceased all operations at O'Hare for any reason other than... operations at O'Hare. (d) The FAA shall not withdraw or temporarily suspend under paragraph (b) any...

  18. Be the First to Arrive and the Last to Leave Your Class

    ERIC Educational Resources Information Center

    Finck, Joseph E.

    2012-01-01

    Many books and articles on teaching strategies and techniques, as well as manuals prepared by college teaching and faculty development support groups, stress the importance of being organized, engaging the students, and faculty making themselves available to their students. This paper discusses how being the first to arrive and the last to leave…

  19. 78 FR 76636 - Agency Information Collection Activities: Consideration of Deferred Action for Childhood Arrivals...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-18

    ...: https://egov.uscis.gov/cris/Dashboard.do , or call the USCIS National Customer Service Center at 1-800... be considered for deferred action for childhood arrivals: 1. Were under the age of 31 as of June 15... SECURITY U.S. Citizenship and Immigration Services Agency Information Collection Activities:...

  20. 77 FR 49451 - Agency Information Collection Activities: Consideration of Deferred Action for Childhood Arrivals...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-16

    .../Dashboard.do , or call the USCIS National Customer Service Center at 1-800-375-5283. Written comments and... for childhood arrivals: 1. Were under the age of 31 as of June 15, 2012; 2. Came to the United States... SECURITY U.S. Citizenship and Immigration Services Agency Information Collection Activities:...

  1. 19 CFR 123.92 - Electronic information for truck cargo required in advance of arrival.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 1 2014-04-01 2014-04-01 false Electronic information for truck cargo required in... Cargo Arriving by Rail or Truck § 123.92 Electronic information for truck cargo required in advance of... electronic data interchange system no later than either 30 minutes or 1 hour prior to the carrier's...

  2. 19 CFR 123.92 - Electronic information for truck cargo required in advance of arrival.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 1 2012-04-01 2012-04-01 false Electronic information for truck cargo required in... Cargo Arriving by Rail or Truck § 123.92 Electronic information for truck cargo required in advance of... electronic data interchange system no later than either 30 minutes or 1 hour prior to the carrier's...

  3. 19 CFR 123.92 - Electronic information for truck cargo required in advance of arrival.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 1 2013-04-01 2013-04-01 false Electronic information for truck cargo required in... Cargo Arriving by Rail or Truck § 123.92 Electronic information for truck cargo required in advance of... electronic data interchange system no later than either 30 minutes or 1 hour prior to the carrier's...

  4. ETR, TRA642. ETR REACTOR VESSEL ARRIVES FROM BOSTON TO THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    ETR, TRA-642. ETR REACTOR VESSEL ARRIVES FROM BOSTON TO THE GANTRY CRANE AT CENTRAL FACILITIES AREA OF NRTS. BOTTOM OF VESSEL FACES CAMERA, HAS OVER THIRTY OPENINGS. INL NEGATIVE NO. 56-4055. R.G. Larsen, Photographer, 12/17/1956 - Idaho National Engineering Laboratory, Test Reactor Area, Materials & Engineering Test Reactors, Scoville, Butte County, ID

  5. The Effects of Age at Arrival and Enclave Schools on the Academic Performance of Immigrant Children

    ERIC Educational Resources Information Center

    Cortes, Kalena E.

    2006-01-01

    This paper analyzes the relationship between age at arrival and immigrant-receiving high schools (i.e., enclave schools) on the academic performance of first- and second-generation immigrant children using data from the Children of Immigrants Longitudinal Study (CILS). The CILS survey was conducted in two major immigrant-receiving cities in the…

  6. Pre-Service English Teachers' Perceptions of Newly Arrived Children from Mainland China

    ERIC Educational Resources Information Center

    Wing Chan, Yu; Gao, Xuesong

    2014-01-01

    The research reported here investigated pre-service English language teachers' perceptions of newly arrived immigrant children from Mainland China in Hong Kong. Seventeen participants, who had at least 10 weeks of experience working with these immigrant children during teaching practicum, participated in focus group discussions and shared…

  7. 19 CFR 123.29 - Procedure on arrival at port of reentry.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...; DEPARTMENT OF THE TREASURY CUSTOMS RELATIONS WITH CANADA AND MEXICO Shipments in Transit Through Canada or Mexico § 123.29 Procedure on arrival at port of reentry. (a) Presentation of documents. At the first port in the United States after transportation through Canada or Mexico under the provisions of...

  8. Predicting cumulative risk of bovine respiratory disease complex (BRDC) using feedlot arrival data and daily morbidity and mortality counts

    PubMed Central

    Babcock, Abram H.; White, Brad J.; Renter, David G.; Dubnicka, Suzanne R.; Scott, H. Morgan

    2013-01-01

    Although bovine respiratory disease complex (BRDC) is common in post-weaning cattle, BRDC prediction models are seldom analyzed. The objectives of this study were to assess the ability to predict cumulative cohort-level BRDC morbidity using on-arrival risk factors and to evaluate whether or not adding BRDC risk classification and daily BRDC morbidity and mortality data to the models enhanced their predictive ability. Retrospective cohort-level and individual animal health data were used to create mixed negative binomial regression (MNBR) models for predicting cumulative risk of BRDC morbidity. Logistic regression models were used to illustrate that the percentage of correctly (within |5%| of actual) classified cohorts increased across days, but the effect of day was modified by arrival weight, arrival month, and feedlot. Cattle arriving in April had the highest (77%) number of lots correctly classified at arrival and cattle arriving in December had the lowest (28%). Classification accuracy at arrival varied according to initial weight, ranging from 17% (< 182 kg) to 91% (> 409 kg). Predictive accuracy of the models improved from 64% at arrival to 74% at 8 days on feed (DOF) when risk code was known compared to 56% accuracy at arrival and 69% at 8 DOF when risk classification was not known. The results of this study demonstrate how the predictive ability of models can be improved by utilizing more refined data on the prior history of cohorts, thus making these models more useful to operators of commercial feedlots. PMID:23814354

  9. Natural selection for earlier male arrival to breeding grounds through direct and indirect effects in a migratory songbird

    PubMed Central

    Velmala, William; Helle, Samuli; Ahola, Markus P; Klaassen, Marcel; Lehikoinen, Esa; Rainio, Kalle; Sirkiä, Päivi M; Laaksonen, Toni

    2015-01-01

    For migratory birds, the earlier arrival of males to breeding grounds is often expected to have fitness benefits. However, the selection differential on male arrival time has rarely been decomposed into the direct effect of male arrival and potential indirect effects through female traits. We measured the directional selection differential on male arrival time in the pied flycatcher (Ficedula hypoleuca) using data from 6 years and annual number of fledglings as the fitness proxy. Using structural equation modeling, we were able to take into account the temporal structure of the breeding cycle and the hierarchy between the examined traits. We found directional selection differentials for earlier male arrival date and earlier female laying date, as well as strong selection differential for larger clutch size. These selection differentials were due to direct selection only as indirect selection for these traits was nonsignificant. When decomposing the direct selection for earlier male arrival into direct and indirect effects, we discovered that it was almost exclusively due to the direct effect of male arrival date on fitness and not due to its indirect effects via female traits. In other words, we showed for the first time that there is a direct effect of male arrival date on fitness while accounting for those effects that are mediated by effects of the social partner. Our study thus indicates that natural selection directly favored earlier male arrival in this flycatcher population. PMID:25859326

  10. Natural selection for earlier male arrival to breeding grounds through direct and indirect effects in a migratory songbird.

    PubMed

    Velmala, William; Helle, Samuli; Ahola, Markus P; Klaassen, Marcel; Lehikoinen, Esa; Rainio, Kalle; Sirkiä, Päivi M; Laaksonen, Toni

    2015-03-01

    For migratory birds, the earlier arrival of males to breeding grounds is often expected to have fitness benefits. However, the selection differential on male arrival time has rarely been decomposed into the direct effect of male arrival and potential indirect effects through female traits. We measured the directional selection differential on male arrival time in the pied flycatcher (Ficedula hypoleuca) using data from 6 years and annual number of fledglings as the fitness proxy. Using structural equation modeling, we were able to take into account the temporal structure of the breeding cycle and the hierarchy between the examined traits. We found directional selection differentials for earlier male arrival date and earlier female laying date, as well as strong selection differential for larger clutch size. These selection differentials were due to direct selection only as indirect selection for these traits was nonsignificant. When decomposing the direct selection for earlier male arrival into direct and indirect effects, we discovered that it was almost exclusively due to the direct effect of male arrival date on fitness and not due to its indirect effects via female traits. In other words, we showed for the first time that there is a direct effect of male arrival date on fitness while accounting for those effects that are mediated by effects of the social partner. Our study thus indicates that natural selection directly favored earlier male arrival in this flycatcher population. PMID:25859326

  11. Seed arrival and ecological filters interact to assemble high-diversity plant communities.

    PubMed

    Myers, Jonathan A; Harms, Kyle E

    2011-03-01

    Two prominent mechanisms proposed to structure biodiversity are niche-based ecological filtering and chance arrival of propagules from the species pool. Seed arrival is hypothesized to play a particularly strong role in high-diversity plant communities with large potential species pools and many rare species, but few studies have explored how seed arrival and local ecological filters interactively assemble species-rich communities in space and time. We experimentally manipulated seed arrival and multiple ecological filters in high-diversity, herbaceous-dominated groundcover communities in longleaf pine savannas, which contain the highest small-scale species richness in North America (up to > 40 species/m2). We tested three hypotheses: (1) local communities constitute relatively open-membership assemblages, in which increased seed arrival from the species pool strongly increases species richness; (2) ecological filters imposed by local fire intensity and soil moisture influence recruitment and richness of immigrating species; and (3) ecological filters increase similarity in the composition of immigrating species. In a two-year factorial field experiment, we manipulated local fire intensity by increasing pre-fire fuel loads, soil moisture using rain shelters and irrigation, and seed arrival by adding seeds from the local species pool. Seed arrival increased species richness regardless of fire intensity and soil moisture but interacted with both ecological filters to influence community assembly. High-intensity fire decreased richness of resident species, suggesting an important abiotic filter. In contrast, high-intensity fire increased recruitment and richness of immigrating species, presumably by decreasing effects of other ecological filters (competition and resource limitation) in postfire environments. Drought decreased recruitment and richness of immigrating species, whereas wet soil conditions increased recruitment but decreased or had little effect on

  12. A Bayesian direction-of-arrival model for an undetermined number of sources using a two-microphone array.

    PubMed

    Escolano, Jose; Xiang, Ning; Perez-Lorenzo, Jose M; Cobos, Maximo; Lopez, Jose J

    2014-02-01

    Sound source localization using a two-microphone array is an active area of research, with considerable potential for use with video conferencing, mobile devices, and robotics. Based on the observed time-differences of arrival between sound signals, a probability distribution of the location of the sources is considered to estimate the actual source positions. However, these algorithms assume a given number of sound sources. This paper describes an updated research account on the solution presented in Escolano et al. [J. Acoust. Am. Soc. 132(3), 1257-1260 (2012)], where nested sampling is used to explore a probability distribution of the source position using a Laplacian mixture model, which allows both the number and position of speech sources to be inferred. This paper presents different experimental setups and scenarios to demonstrate the viability of the proposed method, which is compared with some of the most popular sampling methods, demonstrating that nested sampling is an accurate tool for speech localization. PMID:25234883

  13. Modeling Weather Impact on Airport Arrival Miles-in-Trail Restrictions

    NASA Technical Reports Server (NTRS)

    Wang, Yao; Grabbe, Shon

    2013-01-01

    When the demand for either a region of airspace or an airport approaches or exceeds the available capacity, miles-in-trail (MIT) restrictions are the most frequently issued traffic management initiatives (TMIs) that are used to mitigate these imbalances. Miles-intrail operations require aircraft in a traffic stream to meet a specific inter-aircraft separation in exchange for maintaining a safe and orderly flow within the stream. This stream of aircraft can be departing an airport, over a common fix, through a sector, on a specific route or arriving at an airport. This study begins by providing a high-level overview of the distribution and causes of arrival MIT restrictions for the top ten airports in the United States. This is followed by an in-depth analysis of the frequency, duration and cause of MIT restrictions impacting the Hartsfield-Jackson Atlanta International Airport (ATL) from 2009 through 2011. Then, machine-learning methods for predicting (1) situations in which MIT restrictions for ATL arrivals are implemented under low demand scenarios, and (2) days in which a large number of MIT restrictions are required to properly manage and control ATL arrivals are presented. More specifically, these predictions were accomplished by using an ensemble of decision trees with Bootstrap aggregation (BDT) and supervised machine learning was used to train the BDT binary classification models. The models were subsequently validated using data cross validation methods. When predicting the occurrence of arrival MIT restrictions under low demand situations, the model was able to achieve over all accuracy rates ranging from 84% to 90%, with false alarm ratios ranging from 10% to 15%. In the second set of studies designed to predict days on which a high number of MIT restrictions were required, overall accuracy rates of 80% were achieved with false alarm ratios of 20%. Overall, the predictions proposed by the model give better MIT usage information than what has been

  14. Seismic structure of the Tonga Arc and Lau Backarc Spreading Center from joint inversion of local and teleseismic body wave arrivals

    NASA Astrophysics Data System (ADS)

    Adams, A. N.; Wiens, D. A.; Blackman, D. K.; Webb, S. C.; Dunn, R. A.; Conder, J. A.; Zhao, D.

    2014-12-01

    The Lau Backarc Spreading Center and Tonga Arc provide an excellent environment in which to the study the dynamics of melt production and migration. The Lau Backarc Spreading Center is comprised of three segments, Central Lau Spreading Center, Eastern Lau Spreading Center, and the Valu Fa Spreading Center. The segments show very different spreading and magma production rates as a function of their distance to the arc and slab, which decreases from north to south. Geochemical studies also indicate a systematic change in magma composition along strike of the Lau Back-Arc Spreading Center with more water and fluid-mobile elements in the south. From 2009-2010, 16 broadband seismometers and 51 ocean bottom seismometers (OBS) were installed for one year across the Lau backarc spreading centers and in Fiji and Tonga to image the along-strike structural variation of the subduction zone and the dynamics of the melt production region. We present preliminary results from the joint inversion of P and S wave arrivals from local and teleseismic events recorded by this network. Arrivals from local events were picked manually, while travel time residuals for teleseismic arrivals were determined via the adaptive stacking method developed by Rawlinson and Kennett (2004). Travel times for local events and residuals for teleseismic events are inverted using TOMOG3D (Zhao et al., 1994) to solve for three dimensional velocity structure along strike of the Lau Backarc Spreading Center and Tonga Arc. Preliminary results show a clearly defined westward-dipping low velocity region beneath the Eastern Lau and Valu Fa Spreading Centers, which is most pronounced at depths less than 150 km. The low velocities beneath the Eastern Lau and Valu Fa Spreading Centers are more pronounced relative to those associated with the Tonga Arc.

  15. "Welcome to Sweden...": Newly Arrived Students' Experiences of Pedagogical and Social Provision in Introductory and Regular Classes

    ERIC Educational Resources Information Center

    Nilsson, Jenny; Axelsson, Monica

    2013-01-01

    Education for newly arrived students in Sweden is commonly organised in introductory classes, providing a basis for transition to the mainstream system. Focusing on the hitherto underinvestigated question of how newly arrived students experience the time in and transition between introductory and regular classes, we analyse the social and…

  16. 8 CFR 252.3 - Great Lakes vessels and tugboats arriving in the United States from Canada; special procedures.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... in the United States from Canada; special procedures. 252.3 Section 252.3 Aliens and Nationality... and tugboats arriving in the United States from Canada; special procedures. (a) United States vessels... vessel of United States registry or a tugboat of United States registry arriving from Canada at a port...

  17. 8 CFR 252.3 - Great Lakes vessels and tugboats arriving in the United States from Canada; special procedures.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... in the United States from Canada; special procedures. 252.3 Section 252.3 Aliens and Nationality... and tugboats arriving in the United States from Canada; special procedures. (a) United States vessels... vessel of United States registry or a tugboat of United States registry arriving from Canada at a port...

  18. 19 CFR 122.49a - Electronic manifest requirement for passengers onboard commercial aircraft arriving in the United...

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... onboard commercial aircraft arriving in the United States. 122.49a Section 122.49a Customs Duties U.S..., and Non-Crew Members Onboard Commercial Aircraft Arriving In, Continuing Within, and Overflying the United States § 122.49a Electronic manifest requirement for passengers onboard commercial...

  19. 77 FR 53901 - Notification of the Imposition of Conditions of Entry for Certain Vessels Arriving to the United...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-04

    ... country of the Republic of Yemen, with the exception of vessels arriving from the Ash Shihr Terminal, the Balhalf LNG Terminal, and the Port of Hodeidah. DATES: The policy announced in this notice will become... arriving from the Ash Shihr Terminal, the Balhalf LNG Terminal, and the Port of Hodeidah, during their...

  20. 19 CFR 122.49a - Electronic manifest requirement for passengers onboard commercial aircraft arriving in the United...

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... onboard commercial aircraft arriving in the United States. 122.49a Section 122.49a Customs Duties U.S..., and Non-Crew Members Onboard Commercial Aircraft Arriving In, Continuing Within, and Overflying the United States § 122.49a Electronic manifest requirement for passengers onboard commercial...