Sample records for zeus central tracking

  1. Track reconstruction methodology in the Zeus central tracking detector

    SciTech Connect

    Dyce, N. (H H Wills Physics Laboratory, University of Bristol, Bristol (United Kingdom)); Gingrich, D. (Dept of Nuclear Physics, Oxford University, Oxford (Switzerland)); Cooper-Sarkar, A.M.; Hart, J.C.; Long, K.R.; Saxon, D.H.; Tkaczyk, S.M.; Woodgate, R.A. (Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire (United Kingdom)); Bullock, F.W.; Shaw, D.; Shulman, J. (Dept. of Physics and Astronomy, University College, London (United Kingdom))

    1990-08-01

    The track finding and parameter estimation algorithm for the Zeus Central Tracking Detector (CTD) is presented. A flexible track finding strategy has been developed based on the extension towards the interaction point of seed tracks found in the outer layers of the CTD. Several seed finding techniques have been developed including a vector processor option. By using an appropriate combination of these techniques, a robust track finder is created which is suitable for the high intensity environment expected at the HERA collider. Kalman filtering is used in the track parameter estimation and track finding algorithms.

  2. Data acqusition for the Zeus central tracking detector

    SciTech Connect

    Quinton, S. [Rutherford Appleton Laboratory, Chilton (United Kingdom)

    1989-04-01

    The Zeus experiment is being installed on the Hera electron-proton collider being built at the Desy laboratory in Hamburg. The high beam crossover rate of the Hera machine will provide experience in data acquisition and triggering relevant to the SSC environment. This paper describes the Transputer based data acquisition for the Zeus Central Tracking Detector, and outlines some proposed development work on the use of parallel processing techniques in this field.

  3. Data acquisition for the Zeus central tracking detector

    SciTech Connect

    Quinton, S.; Allen, D.; Cambell, D.; Mcarthur, I. (Rutherford Appleton Lab., Chilton, Didcot OX11 0QX (GB))

    1990-12-01

    The Zeus experiment is being installed on the Hera electron-proton collider being built at the Desy laboratory in Hamburg. The high-beam crossover rate of the Hera machine will provide experience in data acquisition and triggering relevant to the environment of future accelerators such as the SSC. The Transputer-based data acquisition system for the Zeus central tracking detector is described.

  4. Zeus central tracking detector second level trigger and readout architectures

    SciTech Connect

    Devenish, R.C.E.; Gingrich, D.M.; Hallam-Baker, P.; McArthur, I.; Smith, S. (Nuclear Physics Laboratory, University of Oxford, Oxford, (Great Britain))

    1990-08-01

    The Zeus central tracking detector (CTD) second level trigger is based on a network of transputers closely integrated with the CTD data acquisition system. The network which has been designed to exploit the natural parallelism inherent in the CTD design is described. Some performance estimates of the trigger algorithm and data flow through the network are given.

  5. The performance of the FADC system for the ZEUS central tracking detector

    SciTech Connect

    Morgado, C.J.S.; Cassidy, A.; Cussans, D.; Foster, B.; Gilmore, R.; Heath, H.F.; Malos, J.; Tapper, R.J. (Univ. of Bristol (United Kingdom). H.H. Wills Physics Lab.); Baird, S.A.; Galagadera, S.B.; Hardy, P.; Jaroslawski, S.; Matson, R.; Quinton, S.P.H. (Rutherford Appleton Lab., Didcot (United Kingdom))

    1994-08-01

    The Central Tracking Detector (CTD) of the ZEUS experiment uses a Flash Analogue to Digital Converter (FADC) readout system to measure the arrival time of ionization at sense wires as well as the charge deposited. A digitization frequency of 104 MHz is used and the data is written to pipelined data stores. A Digital Signal Processor (DSP) is used to control the main functions on the card as well as perform data parameterization and compression. Test and operational performance results from the first electron-proton interactions are presented.

  6. The timing and control systems of the ZEUS tracking detector data acquisition electronics

    SciTech Connect

    Galagedera, S.B.; Allen, D.; Baird, S.A.; Church, I.; Hardy, P.; Hawthorne, P.A.; Jaroslawski, S.; Jarrett, J.; Madani Bozorg, M.S.; Matson, R.; Quinton, S.P.H. (Rutherford Appleton Lab., Oxfordshire (United Kingdom)); Cassidy, A.; Cussans, D.; Heath, H.F.; Foster, B.; Morgado, C.J.S.; Tapper, R.J. (Univ. of Bristol (United Kingdom). H.H. Wills Physics Lab.)

    1994-08-01

    The very high spatial resolution required by the ZEUS Tracking Detectors and the 96ns periodic interaction between protons and electrons of the Hera collider require real time Analogue Signal Digitization at 104MHz controlled reliably to tight tolerances. Maximum event readout efficiency, fast monitoring of run time errors and testability of front end electronics require pipelining, speed and flexibility. Such an electronic Timing and Control System (TCS) is operational within three main inner detectors of the ZEUS detector and is presented in this paper.

  7. The DO Central Track Trigger

    E-print Network

    Wilson, Graham Wallace; Desai, S.; Cooke, Michael; Connolly, B.; Borcherding, F.; Blazey, G.; Bhattacharjee, M.; Babukhadia, L.; Angstadt, R.; Anderson, John; Olsen, J.

    2004-06-01

    Tracker and Preshower Detectors to generate Level 1 trigger decisions. It also generates lists of seed tracks and preshower clusters that are sent to the Level 1 Moon Trigger, L2 Silicon Track Trigger, and Central and Forward Preshower Level 2...

  8. DESY: The ZEUS Experiment

    NSDL National Science Digital Library

    ZEUS is a collaboration of 450 physicists who are operating a large particle detector at the electron-proton collider HERA at the DESY laboratory in Hamburg. Researchers can find links to the ZEUS physics groups including High Q2, Diffraction and Vector Mesons, and Heavy Flavour Physics. Along with other tasks and components, visitors can learn about the Backing Calorimeter's role in preserving hermetic hadron jets energy measurement and aiding in the tracking of muons passing through the iron yoke of the detector. The website also provides links to the homepages of four of the computing facilities for Zeus.

  9. Upgrade and Operation of the D?? Central Track Trigger (CTT)

    Microsoft Academic Search

    M. Pangilinan

    2007-01-01

    The DOslash experiment at the Fermilab Tevatron collider (Batavia, IL, USA) has undergone significant upgrades in anticipation of high luminosity running conditions. As part of the upgrade, the capabilities of the Central Track Trigger (CTT) to make trigger decisions based on hit patterns in the Central Fiber Tracker (CFT) have been much improved. We report on the implementation, commissioning and

  10. Performance measurement of the upgraded D0 central track trigger

    SciTech Connect

    Mommsen, Remigius, K.; /Manchester U. /Fermilab

    2006-12-01

    The D0 experiment was upgraded in spring 2006 to harvest the full physics potential of the Tevatron accelerator at Fermi National Accelerator Laboratory, Batavia, Illinois, USA. It is expected that the peak luminosity delivered by the accelerator will increase to over 300 x 10{sup 30} cm{sup -2} s{sup -1}. One of the upgraded systems is the Central Track Trigger (CTT). The CTT uses the Central Fiber Tracker (CFT) and Preshower detectors to identify central tracks with p{sub T} > 1.5GeV at the first trigger level. Track candidates are formed by comparing fiber hits to predefined track equations. In order to minimize latency, this operation is performed in parallel using combinatorial logic implemented in FPGAs. Limited hardware resources prevented the use of the full granularity of the CFT. This leads to a high fake track rate as the occupancy increases. In order to mitigate the problem, new track-finding hardware was designed and commissioned. We report on the upgrade and the improved performance of the CTT system.

  11. Fission track dating obsidians in Central and Northern Anatolia

    Microsoft Academic Search

    Giulio Bigazzi; Zehra Yegingil; Tuncay Ercan; Massimo Oddone; Mehmet Özdogan

    1993-01-01

    Twenty obsidian samples from Central and North Anatolia were dated by the fission track method. Split samples analyzed in two different laboratories give consistent results. Data presented refer to three volcanic fields and are summarized as follows: Orta-Sakaeli (Northern Anatolia) obsidians with ages from 21–23 Ma; Göllü Dagi dome complex near Çiftlik (Central anatolia) has given ages between 1.33–0.98 Ma;

  12. Upgrade and operation of the DØ central track trigger

    NASA Astrophysics Data System (ADS)

    Buehler, Marc; Anderson, John; Angstadt, Robert; Babukhadia, Levan; Bhattacharjee, Mrinmoy; Blazey, Gerald; Boeriu, Oana; Borcherding, Fred; Connolly, Brian; Cooke, Michael; Corcoran, Marjorie; Desai, Satish; Evans, David; Gershtein, Yuri; Grannis, Paul; Grünendahl, Stefan; Han, Liang; Hazen, Eric; Heintz, Ulrich; Hensel, Carsten; Hildreth, Mike; Hoeth, Hendrik; Hu, Yuan; Jabeen, Shabnam; Jain, Vivek; Johnson, Marvin; Khalatian, Samvel; Khalatyan, Norik; Lincoln, Don; Linn, Stephan; Liu, Yanwen; Lizarazo, Juan; Mackin, Dennis; Maravin, Yurii; Martin, Manuel; K Mommsen, Remigius; Mutaf, Yildirim; Narain, Meenakshi; Nöding, Carsten; Olsen, Jamieson; Padley, Paul; Pangilinan, Monica; Partridge, Richard; Ramirez-Gomez, Ricardo; Rapisarda, Stefano; Stevenson, Kyle; Tomoto, Makoto; Vachon, Brigitte; Wijnen, Thei; Wilcer, Neal; Wilson, Graham; Wu, Shouxiang; Wyatt, Terry; Xu, Qichun; Yip, Kin

    2007-10-01

    The DØ experiment at the Fermilab pp¯ Tevatron collider (Batavia, IL, USA) has undergone significant upgrades in anticipation of high luminosity running conditions. As part of the upgrade, the capabilities of the Central Track Trigger (CTT) to make trigger decisions based on hit patterns in the Central Fiber Tracker (CFT) have been much improved. We report on the implementation, commissioning and operation of the upgraded CTT system.

  13. Upgrade and Operation of the DZero Central Track Trigger

    SciTech Connect

    Pangilinan, M.P.; /Boston U.; Buehler, M.D.; /Virginia U.

    2007-04-01

    The D{O} experiment at the Fermilab p{bar p} Tevatron collider (Batavia, IL, USA) has undergone significant upgrades in anticipation of high luminosity running conditions. As part of the upgrade, the capabilities of the Central Track Trigger (CTT) to make trigger decisions based on hit patterns in the Central Fiber Tracker (CFT) have been much improved. We report on the implementation, commissioning and operation of the upgraded CTT system.

  14. Highlights from ZEUS

    E-print Network

    M. Wing

    2006-06-30

    Highlights from the ZEUS experiment at HERA as of the DIS06 conference in April are shown. New results focus on measurements from the HERA II running period of inclusive DIS at high momentum transfer using polarised leptons and on their impact in combined QCD and electroweak fits. Investigation of the hadronic final state, both for inclusive and diffractive reactions, continues to challenge theory. These are discussed as well as some previously unmeasured hadronic final states.

  15. Construction and performance of the L3 central tracking detector

    NASA Astrophysics Data System (ADS)

    Beissel, F.; Böhm, A.; Bosseler, K.; Camps, C.; Commichau, V.; Deutschmann, M.; Frohn, H.; Jansen, D.; Göttlicher, P.; Grooten, J.; Hangarter, K.; Herten, U.; Liebmann, H.; Mnich, J.; Möller, M.; Pahlke, R.; Reuter, W.; Rieb, N.; Rinsche, U.; Röhner, S.; Rose, J.; Quadflieg, K.; Schmitz, P.; Schulte, R.; Schulte, S.; Schultze, K.; Spickermann, T.; Starosta, R.; Szczesny, H.; Sassowsky, M.; Tonutti, M.; Virnich, H.; Winands, T.; Sens, J. C.; Bourilkov, D.; Schotanus, D. J.; Akbari, H.; Bao, J.; Chien, C.-Y.; Fisher, P.; Gougas, A.; Newman, D.; Orndorff, J.; Pevsner, A.; Spangler, J.; Spartiotis, C.; Alverson, G.; Glaubman, M.; Leedom, I.; Reucroft, S.; Taylor, L.; Barbier, G.; Béné, P.; Bourquin, M.; Field, J. H.; Forconi, G.; La Marra, D.; Léger, A.; Masciocchi, F.; Perrier, J.; Perrin, E.; Produit, N.; Richeux, J. P.; Weber, M.; Antonov, L.; Botev, S.; Krastev, V.; Orlinov, I.; Hasan, A.; Sultanov, G.; Vikas, P.; Haerdi, E.; Deiters, K.; Donat, A.; Friebel, W.; Heller, R.; Kirsch, S.; Krankenhagen, R.; Lange, W.; Leiste, R.; Lohmann, W.; Lustermann, W.; Röser, U.; Peng, Y.; Tonisch, F.; Trowitzsch, G.; Vogt, H.; Wilhelmi, M.; Anderhub, H.; Baur, W.; Beauvais, F.; Behner, F.; Behrens, J.; Betev, B.; Biland, A.; Djambazov, L.; Dhina, M.; Fehlmann, J.; Hänsli, M.; Herrmann, J.; Hofer, H.; Horisberger, U.; Isiksal, E.; Jung, H.; Kästli, W.; Lanius, K.; Lue, X.; Neyer, C.; Maolinbay, M.; McNally, D.; Okle, M.; Pohl, M.; Rahal-Callot, G.; Ren, D.; Schuijlenburg, H.; Stöhr, B.; Suter, H.; Thürig, H.; Ulbricht, J.; Viertel, G. M.; von Gunten, H. P.; Waldmeier, S.; Weber, J.; Zehnder, L.; Zemp, P.

    1993-07-01

    The L3 central tracking detector has been in operation since the start-up of LEP (Large Electron Positron collider) in 1989. This detector consists of a Time Expansion Chamber (TEC), a layer of Plastic Scintillating Fibers and a Z-chamber. The TEC gives a high spatial resolution and an excellent multi-track reconstruction capability. The fibers are designed to calibrate the drift velocity with high precision. The Z-Chamber provides TEC with accurate information about the z-coordinates of the tracks. A description of the design and the infrastructure of these three detectors, including the readout and data acquisition system, is given. The performance of the detectors during the 1990 and 1991 LEP running periods is presented.

  16. Electromagnetically tracked placement of a peripherally inserted central catheter

    NASA Astrophysics Data System (ADS)

    Sacolick, Laura; Patel, Neilesh; Tang, Jonathan; Levy, Elliot; Cleary, Kevin R.

    2004-05-01

    This paper describes a computer program to utilize electromagnetic tracking guidance during insertion of peripherally inserted central catheters. Placement of a Peripherally Inserted Central Catheter (PICC) line is a relatively simple, routine procedure in which a catheter is inserted into the veins of the lower arm and threaded up the arm to the vena cava to sit just above the heart. However, the procedure requires x-ray verification of the catheter position and is usually done under continuous fluoroscopic guidance. The computer program is designed to replace fluoroscopic guidance in this procedure and make PICC line placement a bedside procedure. This would greatly reduce the time and resources dedicated to this procedure. The physician first goes through a quick registration procedure to register the patient space with the computer screen coordinates. Once registration is completed, the program provides a continuous, real-time display of the position of the catheter tip overlaid on an x-ray image of the patient on an adjacent computer screen. Both the position and orientation of the catheter tip is shown. The display is very similar to that shown when using fluoroscopy.

  17. Long-Term Tracking of the Central Corneal Endothelial Mosaic

    PubMed Central

    Gasser, Laura; Daniel, Moritz; Reinhard, Thomas; Böhringer, Daniel

    2014-01-01

    Purpose When comparing follow-up endothelial cell (EC) density measurements it is only possible to demonstrate cell loss in large cohorts or in pronounced cases due to the standard deviation of measurements. However, especially in clinical studies or refractive surgery patients, EC stability is an important factor. Thus we developed a computer program to achieve cell-by-cell alignment of conventional specular non-contact EC photographs. This is a pilot study to evaluate whether this new diagnostic technique is applicable in postoperative patients. Methods Digitized endothelial cell photos of 30 eyes following implantation of a phakic posterior chamber intraocular lens for correction of high myopia were analyzed. All EC centroids were dotted on each image, and early and late follow-up pictures were automatically aligned on the basis of these centroids. The tracking results were confirmed via alternating image presentation of the corresponding image areas, and were reviewed for loss of individual cells. In addition, conventional EC density measurements were performed. Results Mean time interval between first and second postoperative EC image was 1.4 years (range 3 months – 2.2 years), with early images taken at a median of 5.5 months after IOL implantation (lower/upper quartile 1.2–12.3 months). Extrapolated central EC density was 2812±500/mm2 at the first time point, and 2797±524/mm2 at the second time point. In 26 out of 30 image pairs, the EC mosaic was successfully retraced; cell loss in this area was excluded via photo flickering. Only in 4 image pairs, the EC mosaic could not be matched. Conclusions We demonstrate that the corneal EC mosaic of clinical routine non-contact microscope pictures can be superimposed and compared on single cell level over time with our new computer based program. This new method is valuable to judge on EC stability even in small cohorts since it does not require mean values and standard deviations. PMID:24625809

  18. Opt out of Centralized Management of Licensure and Certification tracking by Human Resources.

    E-print Network

    Squire, Larry R.

    Opt out of Centralized Management of Licensure and Certification tracking by Human Resources. Send completed form to: Human Resources Mail code 8912 Attn. Deanna Syrek We, the undersigned, declare that (Dept of this central service, Human Resources will not serve as the office of record for licensure and certification

  19. Tracking Crustal Thickness Changes During Central Andean Deformation

    NASA Astrophysics Data System (ADS)

    Eichelberger, N. W.; Karimi, B.; McQuarrie, N.; Ryan, J. C.; Beck, S. L.; Zandt, G.

    2013-12-01

    New broadband seismic data from Bolivia and Peru constrain the depth to Moho for the northern Altiplano (AP) and central Andean fold-thrust belt. Combined with improved kinematic constraints on deformation at the central Andean orocline, we are now able to compare the modern crustal distribution to that predicted by the central Andean displacement field. At the first order, the crust beneath the Eastern Cordillera (EC) in northern Bolivia is substantially thinner (~50 - 60km) than in southern Bolivia (?70km) but shortening magnitudes are broadly similar across the orocline (North: 276 km, 300 km; Central: 313 km; South: 326 km). This may suggest that part of the lower crust in northern Bolivia has been either transferred along or across strike or has been removed via processes such as delamination. We evaluate these possibilities using a map-view reconstruction constrained by shortening estimates and paleomagnetic rotation data to forward-model predicted crustal thicknesses. Two end-member models were produced assuming 35 km and 40 km thick pre-Andean crust. We divide our analyses of crustal thickness into three sections (north, central, and south) for the AP, EC, Interandean (IA), and Subandean (SA) zones and took into account the effects of sedimentation and erosion. The predicted volume for each zone is then calculated based on the map-view extent of the section. Results are normalized to the modern crustal volume, calculated in each section's equivalent map-view area. Accounting for approximately 10 km of sedimentation and measured AP shortening, the predicted AP crustal volume is within 10% of the modern volume (predicted crustal thickness = 50-60km). The south EC predicted crustal volumes are initially insufficient (15-20 km thickness deficit). However, additional crustal thickening driven by later shortening in the IA and SA and subsequent under-thrusting of the Brazilian shield can account for a 60-80km EC thick crust (70 km modern thickness). The central section is similar, where the predicted EC volume is less than the modern volume but additional IA and SA shortening accounts for a 70-80km thick EC indicating <10km excess thickness. The northern section is significantly different; the predicted crustal volume for all three zones meets or exceeds the observed volumes. This is a function of the new seismic data that constrains the northern crust below the EC to be ~10-15 km thinner than to the south. The accumulation of excess volume during EC, IA, and SA shortening predicts a ~75-90km EC crust, exceeding modern EC thickness by ~15-30km. If the excess volume were uniformly distributed across the northern EC and AP, it would correspond to a modern thickness of ~65-75km, comparable to the seismically constrained crustal thicknesses in southern Bolivia and southern Peru. While it is possible that excess material may have migrated from northern EC in Bolivia to southern Peru, the highly localized region of thin EC crust imaged by broadband seismic data argues for a more localized removal mechanism than crustal flow. This implies that the northern central Andes may have experienced delamination of at least 10-20 km of lower crust from below the EC.

  20. Natural recovery of steppe vegetation on vehicle tracks in central Mongolia.

    PubMed

    Li, Sheng-Gong; Tsujimura, Maki; Sugimoto, Atsuko; Davaa, Gombo; Sugita, Michiaki

    2006-03-01

    Steppe desertification due to vehicle travel is a severe environmental issue in Mongolia. We studied natural vegetation recovery on abandoned vehicle tracks in the central Mongolia steppe through vegetation surveys and stable isotopic techniques. The following issues were addressed: (i) invasion of pioneering plant species, (ii) alteration of soil surface features, and (iii) contribution of revegetated plants to soil organic matter (SOM). The pioneering plant species that firstly invaded the abandoned tracks are those that could germinate, root and survive in the compacted track surface. Salsola collina is one of these candidate plants. Due to revegetation, soil surface hardness was reduced. With the improvement of surface microenvironmental conditions, other plants began to colonize and establish; con-comitantly species richness and species diversity increased. Carbon isotope ratios of SOM at the top surface layer indicated that C4 -derived carbon contributed more to SOM in the early phase of recovery and decreased with further recovery. PMID:16595879

  1. Natural recovery of steppe vegetation on vehicle tracks in central Mongolia

    Microsoft Academic Search

    Sheng-Gong Li; Maki Tsujimura; Atsuko Sugimoto; Gombo Davaa; Michiaki Sugita

    2006-01-01

    Steppe desertification due to vehicle travel is a severe environmental issue in Mongolia. We studied natural vegetation recovery\\u000a on abandoned vehicle tracks in the central Mongolia steppe through vegetation surveys and stable isotopic techniques. The\\u000a following issues were addressed: (i) invasion of pioneering plant species, (ii) alteration of soil surface features, and (iii)\\u000a contribution of revegetated plants to soil organic

  2. Effects on some clay soil qualities following the passage of rubber-tracked and wheeled tractors in central Italy

    Microsoft Academic Search

    P Servadio; A Marsili; M Pagliai; S Pellegrini; N Vignozzi

    2001-01-01

    There is increased use of rubber-tracked tractors for ploughing on clay soil (Vertic Cambisol) in central, south and insular Italy instead of metal-tracked tractors, because they allow travel on public roads. Field tests were carried out on arable soil previously ploughed and harrowed to compare two types of tractors, one rubber-tracked (CAT Challenger Ch 45) and one wheeled (New Holland

  3. Dinosaur tracks from the Jurassic Shemshak Group in the Central Alborz Mountains (Northern Iran)

    NASA Astrophysics Data System (ADS)

    Abbassi, Nasrollah; Madanipour, Saeed

    2014-04-01

    The Shemshak Group includes alternating layers of coal-bearing shale and siliciclastic sediments in the Baladeh area in the central Alborz Mountains of northern Iran. A diverse and abundant Jurassic dinosaur footprint assemblage is now recognized in the group, which is Toarcian to Bajocian in age in the northern Baladeh. This is the first report of a diverse dinosaur ichnoassemblage from Iran that includes the footprints of sauropods. These tracks can be assigned to three groups of trackmakers: theropods, ornithopods and sauropods. Those of theropods are typically tridactyl in shape, their trackways reflecting bipedal movement. Theropod footprints are very abundant in both northern and western Baladeh. The studied theropod tracks themselves are divided into three major dimensional groups. The medium sized footprints (footprint length, 11-15 cm) are abundant and have a stride length, digit and pace angles like the coelurosaurs footprints and trackway. Theropod footprints were identified as similar to Schizograllator otariensis, Talmontopus tersi and Wildeichnus isp. Ornithopod footprints are tridactyl with rounded and thick toes and belong to bipeds. Some didactyl imprints were also observed. Skin imprints were well preserved in these footprints. The ornithopod tracks resemble Jiayinosorupus johnsoni, as well as Velociraptorichnus sichuanensis for didactyl footprints. Sauropod footprints found in the western part of Baladeh are assigned here to Eosauropus isp., which are pentadactyl pes imprints of a quadruped. The assemblage from Iran resembles similar associations from eastern Asia.

  4. F_2^bbbar measurement at ZEUS

    E-print Network

    Philipp Roloff

    2010-07-05

    Two recent measurements of beauty production in deep inelastic scattering based on data collected by the ZEUS detector are summarised. In the first one, the beauty fraction in the data was obtained from events with a muon and a jet. In the second one, beauty cross sections were measured using the decay length significance and mass of inclusive secondary vertices. Differential cross sections are presented and compared to QCD predictions. The beauty contribution to the inclusive proton structure function F_2^bbbar was extracted for the jet+muon measurement and is compared to previous measurements and theoretical predictions.

  5. The silicon strip detectors of the ZEUS microvertex detector

    E-print Network

    of monocrystalline high resistivity n­type silicon with 512 readout p + -strips, which are AC coupled to the readoutThe silicon strip detectors of the ZEUS microvertex detector Diplomarbeit am II. Institut fË? ur; Abstract A new silicon microvertex detector (MVD) will be installed in the ZEUS experiment during

  6. Track reconstruction with a central two-shell scintillating fibre tracker (SFT)

    Microsoft Academic Search

    F. Anselmo; F. Block; Luisa Cifarelli; C. D'Ambrosio; Thierry Gys; G. La Commare; H. Leutz; M. Marino; S. Qian

    1994-01-01

    We present a track reconstruction algorithm designed for the scintillating fibre tracker (SFT), having in view the upgrade of the L3 detector for LEP-II. This algorithm can also be applied for particle tracking at future hadron colliders. The tracking elements are polystyrene fibres of 60 mum diameter, which are arranged as fused coherent bundles into fibre layers. We study in

  7. Calorimetry in ZEUS: Lessons for the future

    SciTech Connect

    Derrick, M.

    1988-01-01

    The storage ring facility HERA, under construction at the DESY Laboratory, will collide 30 GeV e/sup /minus// with 820 GeV protons when the machine is first turned on in 1990. Four interaction regions being provided. Subsequently either e/sup /minus// or e beams can be used and a facility for producing longitudinal polarization of the electrons at the interaction points will be provided. Both the center-of-mass energy ( s = 314 GeV) and the momentum transfer (Q/sub max/S /approximately/ 10V GeVS) are substantially higher than in any deep inelastic scattering studies to date. The HERA program will be the natural extension of both the neutrino and the muon scattering experiments done at CERN and Fermilab. With the design luminosity of 1.5 10T cm/sup /minus/2/ sec/sup /minus/1/ experiments with 200 pb/sup /minus/1/ of integrated luminosity will be possible. HERA will be the first electron-quark collider. The energy is substantially higher than LEP, and the events will be cleaner than those resulting from p/bar p/ collisions. It provides the third leg that will support the physics stool of the 1990s. In neutral current events, the z exchange graph is comparable in strength to the photon exchange and the charged current events will provide unique insights into the W coupling. There will be substantial rates of heavy quark production. Two detectors are under construction: H1 uses a large solenoid with a liquid argon calorimeter inside the coil, ZEUS uses a smaller magnet with uranium-scintillator calorimeters outside of the coil. 4 refs., 11 figs.

  8. Tracking River Recharge in the Central Valley of California Using Chemical and Isotopic Tracers

    Microsoft Academic Search

    J. E. Moran; B. Hudson; D. Evans; T. Horner; R. Leif; G. F. Eaton

    2003-01-01

    Recharge to alluvial aquifers along the major rivers of the Central Valley of California is influenced by human activity in adjacent urban areas and groundwater basins. Intense pumping of Central Valley aquifers may induce recharge, while slurry walls, emplaced for flood control in densely populated areas, are intended to protect levees by preventing shallow recharge. These large rivers carry distinct

  9. Fission-track dating of bentonites and bentonitic mudstones from the Morrison Formation in central Utah

    Microsoft Academic Search

    Bart J. Kowallis; Julia S. Heaton

    1987-01-01

    Fission-track ages show that most of the Morrison Formation is Late Jurassic or perhaps earliest Cretaceous, ranging in age from 130 to 157 Ma. However, the upper part of the Morrison Formation in the Brushy Basin Member gives ages ranging from 99 to 123 Ma, covering a wide span of Early Cretaceous time. The bentonites dated are stratigraphically below what

  10. News on ZEUS Leading Baryon Roberto Sacchi

    E-print Network

    ,Y = 0.23 cm = 22 µrad LPS: 6 stations with µstrip detectors · only stations S4-S6 analyzed sofar · hit by apertures and detector size (LPS) Integrating over the azimuth: LPS (s4-s6): · pT range varies with x, L = 12.8 pb-1 4 X larger statistics ! · Standard DIS selection + LPS track § pipe>0.4 mm § pot>0

  11. 9/17/12 Jack Liu tracks our ecological footprint | AAAS MemberCentral 1/5membercentral.aaas.org/blogs/member-spotlight/jack-liu-tracks-our-ecological-footprint

    E-print Network

    9/17/12 Jack Liu tracks our ecological footprint | AAAS MemberCentral 1/5membercentral.aaas.org/blogs (/discounts) Watch/Listen (/multimedia) Resources (/downloads) Blogs (/blogs) Membership (/membership) AAAS News (/announcements) Events (/events) Home (/) > Blogs (/blogs) > Member Spotlight (/blogs/Member%20

  12. Power collection reduction by mirror surface nonflatness and tracking error for a central receiver solar power system.

    PubMed

    McFee, R H

    1975-07-01

    The effects of random waviness, curvature, and tracking error of plane-mirror heliostats in a rectangular array around a central-receiver solar power system are determined by subdividing each mirror into 484 elements, assuming the slope of each element to be representative of the surface slope average at its location, and summing the contributions of all elements and then of all mirrors in the array. Total received power and flux density distribution are computed for a given sun location and set of array parameter values. Effects of shading and blocking by adjacent mirrors are included in the calculation. Alt-azimuth mounting of the heliostats is assumed. Representative curves for two receiver diameters and two sun locations indicate a power loss of 20% for random waviness, curvature, and tracking error of 0.1 degrees rms, 0.002 m(-1), and 0.5 degrees , 3sigma, respectively, for an 18.2-m diam receiver and 0.3 degrees rms, 0.005 m(-1), and greater than 1 degrees , respectively, for a 30.4-m diam receiver. PMID:20154860

  13. In Situ Assimilation Tracked By Trace Element Variation in Augite: Sausfjellet Pluton, North-Central Norway

    NASA Astrophysics Data System (ADS)

    Barnes, C. G.; Coint, N.; Yoshinobu, A. S.; Prestvik, T.; Barnes, M. A. W.

    2014-12-01

    The Sausfjellet pluton is a sub-circular, 445 Ma pluton in the Bindal Batholith. It was intruded into mid-crustal level (~700 MPa), high-grade rocks during Taconian assembly of the Helgeland Nappe Complex. Stage 1 of the pluton is massive pyroxene hornblende gabbro with poikilitic hornblende. Stage 2, the subject of this study, occupies the central and western parts of the pluton and is gradationally zoned from central, layered, xenolith-rich hornblende biotite two-pyroxene diorite + anorthosite, to western, massive, xenolith-poor hornblende biotite three-pyroxene quartz monzonite. Bulk-rock compositions are consistent with widespread accumulation of pyroxene + plagioclase. In order to separate effects of accumulation from assimilation, trace element zoning profiles in augite were used as a proxy for changes in melt composition. Augite is normally zoned, with incompatible elements increasing from cores to rims. However, trace element variation among samples plots as multiple trends that can be resolved into two broad groups that correspond to the central and western zones. Augite in the layered central zone has lower abundances of REE, Pb and Hf and higher abundances of Cr, V, Ni, Sr, and P compared to the western zone. The two trends intersect at low concentrations of incompatible elements such as Zr. Calculation of melts in equilibrium with augite, combined with AFC-type modeling, suggest that variation in augite Zr contents requires assimilation of Zr-rich rocks in all Stage 2 rocks. In the western zone, increases in Zr, Hf, REE and Pb suggest assimilation of Neoproterozoic gneisses that are host to the western zone; this conclusion is consistent with bulk-rock ?18O values. We conclude that assimilation of host rocks was widespread in this mid-crustal magma body, and that augite preserves a trace element record of differentiation (AFC) that is difficult to identify using bulk-rock compositions alone.

  14. Fission-track dating of bentonites and bentonitic mudstones from the Morrison Formation in central Utah

    SciTech Connect

    Kowallis, B.J.; Heaton, J.S.

    1987-12-01

    Fission-track ages show that most of the Morrison Formation is Late Jurassic or perhaps earliest Cretaceous, ranging in age from 130 to 157 Ma. However, the upper part of the Morrison Formation in the Brushy Basin Member gives ages ranging from 99 to 123 Ma, covering a wide span of Early Cretaceous time. The bentonites dated are stratigraphically below what has been called the basal Buckhorn Conglomerate Member of the Cedar Mountain Formation. This may indicate that (1) the Buckhorn Conglomerate is not the base of the Cedar Mountain age sediments; (2) the Buckhorn Conglomerate has been misidentified in their section and is absent, in which case there would be no clear boundary between the Morrison and Cedar Mountain Formation; or (3) a significant part of the Brushy Basin member is Cretaceous in age and not Jurassic. These are not necessarily mutually exclusive, and it may be that a combination of these factors is true for their section. The long-term sediment accumulation rate calculated from the fission-track dates for the lower Brushy Basin, Salt Wash, and Tidwell Members of the Morrison Formation is about 6.2 m/m.y., whereas the long-term rate for the upper Brushy Basin Member is only about 0.6 m/m.y. However the change from relatively rapid to relatively slow sedimentation and subsidence occurs at about 140 Ma. This was about the time of a slowing of plate collision to the west and near the start of a gap in plutonic activity associated with the change in collision rates. Therefore, some of the change in sediment-accumulation rates in their section may be reflecting a reduction in the supply of ash and other sediment into the Morrison basin as a result of the changing tectonic regime to the west.

  15. Using atmospheric chemistry and storm tracks to explain nitrate stable isotope variations in precipitation at a site in central Pennsylvania, USA

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Stable isotopes of NO3- (delta15N-NO3- and delta18O-NO3-) were monitored in precipitation at a central Pennsylvania site during six storm events in 2005 to determine whether information on atmospheric oxidants (e.g. O3, NO2, and NOx), and storm-tracks were capable of explaining observed seasonal and...

  16. Miocene to Recent exhumation of the central Himalaya determined from combined detrital zircon fission-track and U/Pb analysis of Siwalik

    E-print Network

    Paris-Sud XI, Université de

    1 Miocene to Recent exhumation of the central Himalaya determined from combined detrital zircon determined from combined detrital zircon fission-track and U/Pb analysis of Siwalik sediments, western Nepal) analysis of detrital zircon from synorogenic sediment is a well established tool to examine the cooling

  17. Tracking River Recharge in the Central Valley of California Using Chemical and Isotopic Tracers

    NASA Astrophysics Data System (ADS)

    Moran, J. E.; Hudson, B.; Evans, D.; Horner, T.; Leif, R.; Eaton, G. F.

    2003-12-01

    Recharge to alluvial aquifers along the major rivers of the Central Valley of California is influenced by human activity in adjacent urban areas and groundwater basins. Intense pumping of Central Valley aquifers may induce recharge, while slurry walls, emplaced for flood control in densely populated areas, are intended to protect levees by preventing shallow recharge. These large rivers carry distinct chemical and isotopic signatures that allow recent recharge to be traced in adjacent wells. In particular, stable isotopes of oxygen delineate areas where river water, carrying a depleted isotopic signature from Sierra Nevada precipitation (-11 to -15 per mil), is recharging groundwater aquifers where local precipitation is significantly heavier (-7 per mil). Trace anthropogenic compounds present in river water, such as MtBE (from precipitation and recreational boating on watershed reservoirs), are also useful for identifying areas where river water has recently infiltrated. Analysis of groundwater age, using the tritium-helium method allows estimation of the time since recharge, and evaluation of the effect of human activity on the natural groundwater recharge and flow patterns. Results from a detailed study along the American River in Sacramento, where a slurry wall is in place, show areas of recent recharge, as evidenced by relatively high MtBE concentrations (matching river concentrations) and young groundwater ages in shallow wells. In other wells, older ages and very low MtBE concentrations delineate areas where active recharge is not taking place. These results are interpreted in the context of basin-wide analyses for the Sacramento urban area, where most groundwater sampled from municipal wells is devoid of tritium, and therefore recharged more than about 50 years ago. These data are collected for the Ambient Groundwater Monitoring and Assessment (GAMA) program, sponsored by the CA State Water Resources Control Board. Oxygen isotopes indicate that American River water has recharged a large portion of this basin, with wells showing decreasing fractions of isotopically depleted water moving away from the river to the north. A similar pattern is observed in other areas of intense pumping in groundwater basins along the major rivers in the Central Valley. This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-ENG-48.

  18. Tracking Induced Pluripotent Stem Cells–Derived Neural Stem Cells in the Central Nervous System of Rats and Monkeys

    PubMed Central

    Tang, Hailiang; Sha, Hongying; Sun, Huaping; Wu, Xing; Xie, Liqian; Wang, Pu; Xu, Chengshi; Larsen, Christian; Zhang, Helen L.; Gong, Ye; Mao, Ying; Chen, Xiancheng; Zhou, Liangfu

    2013-01-01

    Abstract Despite of the immense breakthroughs of induced pluripotent stem cells (iPSCs), clinical application of iPSCs and their derivates remains hampered by a lack of definitive in vivo studies. Here, we attempted to track iPSCs-derived neural stem cells (NSCs) in the rodent and primate central nervous system (CNS) and explore their therapeutic viability for stem cell replacement in traumatic brain injury (TBI) rats and monkeys with spinal cord injury (SCI). Superparamagnetic iron oxide (SPIO) particles were used to label iPSCs-derived NSCs in vitro. Labeled NSCs were implanted into TBI rats and SCI monkeys 1 week after injury, and then imaged using gradient reflection echo (GRE) sequence by 3.0T magnetic resonance imaging (MRI) scanner. MRI analysis was performed at 1, 7, 14, 21, and 30 days, respectively, following cell transplantation. Pronounced hypointense signals were initially detected at the cell injection sites in rats and monkeys and were later found to extend progressively to the lesion regions, demonstrating that iPSCs-derived NSCs could migrate to the lesion area from the primary sites. The therapeutic efficacy of iPSCs-derived NSCs was examined concomitantly through functional recovery tests of the animals. In this study, we tracked iPSCs-derived NSCs migration in the CNS of TBI rats and SCI monkeys in vivo for the first time. Functional recovery tests showed obvious motor function improvement in transplanted animals. These data provide the necessary foundation for future clinical application of iPSCs for CNS injury. PMID:24020696

  19. A New Centralized Sensor Fusion-Tracking Methodology Based on Particle Filtering for Power-Aware Systems

    Microsoft Academic Search

    Yan Zhai; Mark B. Yeary; Joseph P. Havlicek; Guoliang Fan

    2008-01-01

    In this paper, we address the problem of target tracking in a collaborative acoustic sensor network. To cope with the inherent characteristics and constraints of wireless sensor networks, we present a novel target-tracking algorithm with power-aware concerns. The underlying tracking methodology is described as a multiple-sensor tracking\\/fusion technique based on particle filtering. As discussed in the most recent literature, particle

  20. Flood-tracking chart for the Withlacoochee and Little River Basins in south-central Georgia and northern Florida

    USGS Publications Warehouse

    Gotvald, Anthony J.; McCallum, Brian E.; Painter, Jaime A.

    2014-01-01

    The U.S. Geological Survey (USGS), in cooperation with other Federal, State, and local agencies, operates a flood-monitoring system in the Withlacoochee and Little River Basins. This system is a network of automated river stage stations (ten are shown on page 2 of this publication) that transmit stage data through satellite telemetry to the USGS in Atlanta, Georgia and the National Weather Service (NWS) in Peachtree City, Georgia. During floods, the public and emergency response agencies use this information to make decisions about road closures, evacuations, and other public safety issues. This Withlacoochee and Little River Basins flood-tracking chart can be used by local citizens and emergency response personnel to record the latest river stage and predicted flood-crest information along the Withlacoochee River, Little River, and Okapilco Creek in south-central Georgia and northern Florida. By comparing the current stage (water-surface level above a datum) and predicted flood crest to the recorded peak stages of previous floods, emergency response personnel and residents can make informed decisions concerning the threat to life and property.

  1. Diffraction: from HERA to the LHC M.Kapishin for the H1 and ZEUS Collaborations

    E-print Network

    measurement LRG and LPS methods have different systematic uncertainties ZEUS: Mx method via decomposition,xIP,,Q2) LPS measurement 0 0.1 0 0.1 0 0.1 0 0.1 0 0.1 10 -3 10 -2 10 -1 10 -3 10 -2 10 -1 10 -3 10 -2 10 -1 ZEUS xIPr D(4)(GeV -2 ) =0.13 GeV 2 =0.3 GeV2 ZEUS LPS 33 pb-1 =0.003 Regge fit LPS =0

  2. ZEUS: An Advanced ToolKit for Engineering Distributed Multi-Agent Systems

    Microsoft Academic Search

    Hyacinth S. Nwana; Divine T. Ndumu; Lyndon C. Lee

    1998-01-01

    There is an emerging consensus on the need to develop methodologies and tool-kits for building distributed multi-agent systems. This paper presents ZEUS, an advanced development tool-kit for constructing collaborative agent applications. ZEUS is a culmination of a careful synthesis of established agent technologies with the addition of some new ones, to provide an integrated environment for the rapid software engineering

  3. A Distributed Bronchial Mapping Software Tool for the Tracking of Cellular, Molecular and Imaging Results in the Central Airways

    E-print Network

    Mattmann, Chris

    Atlas tools including the Bronchial Map. Patient specimen data is annotated with a common set of dataA Distributed Bronchial Mapping Software Tool for the Tracking of Cellular, Molecular and Imaging The EDRN Biomarker Atlas Working Group recently has developed a Biomarker Atlas software system that allows

  4. Prototype VME data acquisition card for the ZEUS calorimeter

    SciTech Connect

    Dawson, J.W.; Berg, J.S.; Schlereth, J.L.; Stanek, R.

    1988-01-01

    This paper discusses the design of a prototype data acquisition (DAQ) card for the ZEUS calorimeter. The card accepts two multiplexes analog data streams at a 1 MHz rate, and digitizes and stores the data for subsequent transfer through VME to a host computer. The data is buffered by a high-speed asynchronous FIFO following the A/D converters, and written into Data Memory on the card, either directly or after processing by an on-board digital signal processor (DSP). Each card has a 16-bit control-status register (CSR), the bits of which configure the hardware and define the hardware options. The 1/4 Mbyte of high speed CMOS static RAM appears either as a FIFO, or mapped memory depending upon a bit in the CSR. The card is designed to make use of the 32-bit data and address buses supported by VME, and accordingly can be most efficiently utilized in conjunction with a processor in the VME environment such as the 68020, which supports longword transfers in a 32-bit address space. The card is constructed on a ten layer printed circuit, with almost all components being surface-mount devices. All logic is implemented in PLD's. 5 refs., 4 figs., 3 tabs.

  5. Which cue to 'want'? Opioid stimulation of central amygdala makes goal-trackers show stronger goal-tracking, just as sign-trackers show stronger sign-tracking.

    PubMed

    DiFeliceantonio, Alexandra G; Berridge, Kent C

    2012-05-01

    Pavlovian cues that have been paired with reward can gain incentive salience. Drug addicts find drug cues motivationally attractive and binge eaters are attracted by food cues. But the level of incentive salience elicited by a cue re-encounter still varies across time and brain states. In an animal model, cues become attractive and 'wanted' in an 'autoshaping' paradigm, where different targets of incentive salience emerge for different individuals. Some individuals (sign-trackers) find a predictive discrete cue attractive while others find a reward contiguous goal cue more attractive (location where reward arrives: goal-trackers). Here we assessed whether central amygdala mu opioid receptor stimulation enhances the phasic incentive salience of the goal-cue for goal-trackers during moments of predictive cue presence (expressed in both approach and consummatory behaviors to goal cue), just as it enhances the attractiveness of the predictive cue target for sign-trackers. Using detailed video analysis we measured the approaches, nibbles, sniffs, and bites directed at their preferred target for both sign-trackers and goal-trackers. We report that DAMGO microinjections in central amygdala made goal-trackers, like sign-trackers, show phasic increases in appetitive nibbles and sniffs directed at the goal-cue expressed selectively whenever the predictive cue was present. This indicates enhancement of incentive salience attributed by both goal trackers and sign-trackers, but attributed in different directions: each to their own target cue. For both phenotypes, amygdala opioid stimulation makes the individual's prepotent cue into a stronger motivational magnet at phasic moments triggered by a CS that predicts the reward UCS. PMID:22391118

  6. Apatite fission track evidence for Miocene extensional faulting east-central Nevada, northern Basin and Range province

    SciTech Connect

    Miller, E.L.; Dumitru, T.A. (Stanford Univ., CA (United States). Geology Dept.); Gans, P.B. (Univ. of California, Santa Barbara, CA (United States). Geological Sciences Dept.); Brown, R.W. (La Trobe Univ., Bundoora (Australia). Geology Dept.)

    1993-04-01

    Apatite fission track ages indicates that a large component of motion along many of the present range-bounding faults occurred in the Early to Middle Miocene, tilting and uplifting rocks through the apatite annealing zone (120--60 C) between 18--13 Ma (n = 20, Deep Creeks), 18--15 Ma (northern Snake Range, n = 20), 25--17 Ma (n = 7, southern Snake Range), 24--15 Ma (Egan Range, n = 6), 23--18 Ma (Kern Mts., n = 2) and 28--16 ma (Schell Creek Range, n = 2). Long track length distributions indicate rapid cooling through the 120--60 C interval followed by residence at low, near surface temperatures. The data set also indicates that the combined Deep Creek-Kern Mountains-northern and southern Snake Range constitutes a single coherent footwall crustal block beneath a > 150 km-long system of east-dipping Miocene faults which includes at least the eastern portions of faults that have been mapped as the Snake Range decollement (NSRD). Conglomerates deposited in hanging wall basins along this fault system contain metamorphic and granitic boulders whose FT ages are coeval with footwall unroofing. The deposits themselves are now known to be younger than previously reported (Oligocene) as ages from boulders are Miocene. The thick (> 2 km) sequences of synorogenic conglomerate indicates rapid unroofing; large slide blocks attest to generation of steep, fault-controlled topography. Faults that cut this sequence are now known to be younger than 15 Ma. Thus, protracted extensional faulting affected the region, beginning in the Early Oligocene and continuing to the Recent, but a significant part of this extension, including a large component of the slip on the NSRD, was accomplished in the Early to Middle Miocene. Data from this region is compatible with a growing base of apatite fission track data from elsewhere in the northern Basin and Range, which, together with geologic relationships, suggest an important episode of Miocene extension and Basin and Range development.

  7. Diffractive Results from the ZEUS Leading Proton Spectrometer at HERA

    E-print Network

    .04.­01.05.2001 1 #12; Barbara Smalska Warsaw University Leading Proton Spectrometer ffl 6 silicon ¯­strip stations in the calorimeter ffl proton track with xL ? 0.95 detected in LPS ffl random overlay of beam halo with non

  8. Observing Decadal Trends in Atmospheric Feedbacks and Climate Change with Zeus and CLARREO

    NASA Astrophysics Data System (ADS)

    Revercomb, H. E.; Best, F. A.; Knuteson, R. O.; Tobin, D. C.; Taylor, J. K.; Gero, P.; Adler, D. P.; Pettersen, C.; Mulligan, M.; Tobin, D. C.

    2012-12-01

    New technologies for observing decadal trends in atmospheric feedbacks and climate change from space have been recently demonstrated via a NASA Instrument Incubator Program (IIP) project of our group and the Anderson Group of Harvard University. Using these new technologies, a mission named Zeus has been proposed to the first NASA Earth Venture Instruments opportunity (EVI-1). Zeus would provide a low cost mechanism to initiate a new era in high spectral resolution IR climate Benchmark and Intercalibration observations, the basis for which has been established by definition of the CLARREO mission in the 2007 NRC "Decadal Survey" and by the Science Definition Team established by NASA LaRC to further the full blown CLARREO mission. Zeus EVI is a low-cost, low-risk, and high-value EVI mission that will deploy an Absolute Radiance Interferometer (ARI) instrument to measure absolute spectrally resolved infrared radiance over much of the Earth-emitted spectrum with ultra-high accuracy (<0.1 K 3-sigma brightness temperature). Zeus makes use of broad spectral coverage (3.7-50 microns) and high spectral resolution (<1 cm-1) to provide benchmark products for climate trending with much higher information content than traditional spectrally-integrated measurements. While ARI requirements for accuracy and spectral properties are demanding, the overall instrument is relatively simple and low-cost because of the limited requirements on spatial sampling (25-100 km nadir-only footprints spaced at < 250 km) and on noise performance (climate products are created by combining many samples). The orbit chosen for Zeus must provide coverage immune to time-of-day sampling errors. Because of its relatively high rate of precession, an attractive baseline option for Zeus EVI is the 51.6 degrees inclination orbit of the International Space Station (ISS). For Zeus deployment on the ISS, higher latitude climate benchmark information will be obtained from operational sounders intercalibrated by Zeus. A key aspect of the Zeus ARI instrument is the On-orbit Verification and Test System (OVTS) for verifying its accuracy by reference to International Standards (SI) and testing on orbit. The OVTS includes an On-orbit Absolute Radiance Standard (OARS), which is a high emissivity cavity blackbody that can be operated over a wide range of temperatures to verify ARI calibration. The OARS uses multiple small phase change cells to establish its fundamental temperature scale to better than 5 mK absolute and a broad-band heated-halo source for monitoring its cavity spectral emissivity throughout the mission. A Quantum Cascade Laser (QCL) is also used by the OVTS to monitor the ARI instrument spectral lineshape and the emissivity of its calibration blackbody relative to that of the OARS. The ARI radiance measurements will also be tested for other systematic errors on orbit (non-linearity, polarization effects, and stray light). Through especially careful attention to accuracy, proven on orbit, Zeus EVI will provide the first irrefutable benchmark measurements of the Earth's emitted spectral radiance with accuracy exceeding 0.1 K 3 sigma. In addition, Zeus will serve as a reference standard for operational advanced sounders and will enable fundamental improvements in our capability to document climate trends and to forecast climate and weather.

  9. Tracking atmospheric and riverine terrigenous supplies variability during the last glacial and the Holocene in central Mediterranean

    NASA Astrophysics Data System (ADS)

    Bout-Roumazeilles, V.; Combourieu-Nebout, N.; Desprat, S.; Siani, G.; Turon, J.-L.

    2012-07-01

    The objectives were to retrace the eolian and fluvial terrigenous supplies in a sediment core from the Sicilian-Tunisian Strait by coupling mineralogical, grain-size and geochemical approaches, in order to get informations on the atmospheric versus riverine contributions to sedimentation on the southern side of central Mediterranean since the last glacial. The eolian supply is dominant over the whole interval, excepted during the sapropel S1 when riverine contribution apparently became significant, and particles provenance has been modified since Last Glacial. Saharan contribution increased during the Bølling-Allerød, evidencing the persistence of aridity over North Africa although the northern Mediterranean already experienced moister and warmer conditions. The Younger Dryas is marked by proximal dust inputs highlighting intense regional eolian activity. A southward migration of dust provenance toward Sahel occurred at the onset of the Holocene, likely resulting from a southward position of the Inter Tropical Convergence Zone, probably associated with a large-scale atmospheric reorganization. Finally, a peculiar high terrigenous flux associated with drastic modifications of the mineralogical and geochemical sediment signature occurred during the sapropel S1, suggesting the propagation of fine-particles derived from major floodings of the Nile River - resulting from enhanced rainfall on northeastern Africa - and their transportation across the Sicilian-Tunisian Strait by intermediate water-masses.

  10. Phanerozoic upper crustal tectono-thermal development of basement rocks from central Madagascar: An integrated fission-track and structural study

    NASA Astrophysics Data System (ADS)

    Emmel, B.; Jacobs, J.; Kastowski, M.; Graser, G.

    2006-01-01

    An integrated study of fission-track (FT) dating and structural geology revealed a complex tectono-thermal history preserved in basement rocks of central Madagascar since the amalgamation of Gondwana at the end of the Cambrian. A detailed study of five domains argues for several cooling steps with associated brittle deformations during the separation of Madagascar. Titanite and apatite FT ages range between 483 Ma and 266 Ma and between 460 Ma and 79 Ma, respectively. The titanite FT data indicate that the final cooling after the latest metamorphic overprint was terminated at c. 500 Ma (FC1). A 150 Myr phase of minor cooling (SC2), possibly related to a phase of tectonic quiescence and isostatic compensation, followed episode FC1. Between the Carboniferous and Early Jurassic, when an intracontinental rift developed between East Africa and Madagascar, complex brittle deformation effected the western margin of Madagascar and led to differential cooling of small basement blocks (FC3-FC5). During this period, ductile structural trends were reactivated at the western basement margin and in the centre of the island. A Late Cretaceous thermal event (T1) affected apatite FT data of samples from western-central and the eastern margin of Madagascar. These ages are related to the Madagascar-India/Seychelles break-up, whereby the thermal penetration along the eastern coast was restricted to the west by the Angavo shear zone (AGSZ). The Cretaceous evolution of the eastern margin was associated with minor erosion and was triggered by vertical displacements along brittle structures.

  11. Tracking dynamic team activity

    SciTech Connect

    Tambe, M. [Univ. of Southern California, Marina del Rey, CA (United States)

    1996-12-31

    AI researchers are striving to build complex multi-agent worlds with intended applications ranging from the RoboCup robotic soccer tournaments, to interactive virtual theatre, to large-scale real-world battlefield simulations. Agent tracking - monitoring other agent`s actions and inferring their higher-level goals and intentions - is a central requirement in such worlds. While previous work has mostly focused on tracking individual agents, this paper goes beyond by focusing on agent teams. Team tracking poses the challenge of tracking a team`s joint goals and plans. Dynamic, real-time environments add to the challenge, as ambiguities have to be resolved in real-time. The central hypothesis underlying the present work is that an explicit team-oriented perspective enables effective team tracking. This hypothesis is instantiated using the model tracing technology employed in tracking individual agents. Thus, to track team activities, team models are put to service. Team models are a concrete application of the joint intentions framework and enable an agent to track team activities, regardless of the agent`s being a collaborative participant or a non-participant in the team. To facilitate real-time ambiguity resolution with team models: (i) aspects of tracking are cast as constraint satisfaction problems to exploit constraint propagation techniques; and (ii) a cost minimality criterion is applied to constrain tracking search. Empirical results from two separate tasks in real-world, dynamic environments one collaborative and one competitive - are provided.

  12. Cenozoic tectonics in the Buruanga Peninsula, Panay Island, Central Philippines, as constrained by U-Pb, 40Ar/39Ar and fission track thermochronometers

    NASA Astrophysics Data System (ADS)

    Walia, M.; Yang, T. F.; Knittel, U.; Liu, T.-K.; Lo, C.-H.; Chung, S.-L.; Teng, L. S.; Dimalanta, C. B.; Yumul, G. P.; Yuan, W. M.

    2013-01-01

    Buruanga Peninsula forms the westernmost part of Panay Island, Central Philippines and is a part of the Palawan Continental Terrane (PCT), which was formerly attached to south-eastern China. It acted as the leading edge of the continental fragment and collided with the Philippine Mobile Belt (PMB) followed by convergence beneath the latter. Dating of the collision is crucial for understanding the evolution of the archipelago. Samples collected from Buruanga Peninsula were dated using U-Pb, 40Ar/39Ar and fission track dating (FTD) techniques to constrain the timing of the tectonic events related to the collision of the PMB with the PCT. These techniques have enabled us to obtain ages over a range of closure temperatures from about 700 °C to about 110 °C. Paleoproterozoic and Permian zircon U-Pb ages from Saboncogon Formation emphasize derivation of the western part of Buruanga Peninsula from SE China; zircon and apatite fission track ages of 51 Ma and 16 Ma, respectively, constrain the exhumation of this formation. The age data suggest tectonic events at ~ 14 Ma, ~ 11-12 Ma and about 7-8 Ma following intrusive activity at about 18 Ma. Uplift and exhumation at ~ 14 Ma are thought to be the result of subduction of low-density crustal rocks, at 11 Ma to be the result of isostatic uplift as a consequence of crustal thickening and at ~ 8 Ma to be due to the isostatic re-equilibration of the sediments overlying the former suture. Hence, collision is constrained to have started at about 14-15 Ma and to have ended before 8 Ma. Multi-element patterns of the 18 Ma Patria-Diorite from Buruanga Peninsula show enrichment in LILE (Rb, Sr, and K) and LREE and depletion in HFSE elements (Ti, Nb, and Ta) similar to those from Luzon volcanics and the volcanic rocks of Negros Island. These arc-signatures indicate a subduction related environment for the emplacement of this intrusive body and show that the diorite belongs to the PMB. The age constraints of the present study neither support the concept of an Early Miocene collision nor the assumption of a Late Miocene collision, thus, have a significant bearing on the controversial issues regarding the evolution of the present day Philippine archipelago.

  13. Combined apatite fission-track and single grain apatite (U–Th)\\/He ages from basement rocks of central Dronning Maud Land (East Antarctica) — Possible identification of thermally overprinted crustal segments?

    Microsoft Academic Search

    B. Emmel; J. Jacobs; P. Crowhurst; M. C. Daszinnies

    2007-01-01

    Apatite fission-track (FT) and single grain (U–Th)\\/He ages from four vertical profiles in central Dronning Maud Land (East Antarctica) range from 312±20 Ma to 135±11 Ma and 304±28 Ma to 104±8 Ma, respectively. The combined age data allows to discriminate between undisturbed cooled (due to exhumation) and thermally overprinted crustal blocks. Profiles at the Zwieselhöhe and the Conradgebirge revealed unusual apatite FT vs. elevation

  14. Changes in some physical properties of a clay soil in Central Italy following the passage of rubber tracked and wheeled tractors of medium power

    Microsoft Academic Search

    M Pagliai; A Marsili; P Servadio; N Vignozzi; S Pellegrini

    2003-01-01

    The aim of this study was to evaluate the compacting effect of rubber tracked tractors in comparison to that of the traditional wheeled tractors. Macroporosity, pore shape and size distribution, bulk density, penetration resistance and saturated hydraulic conductivity were analysed in a clay soil (Vertic Cambisol) near Rome (Italy) following one and four passes on the same track of rubber

  15. Late Mesozoic and Cenozoic thermotectonic evolution of the central Brooks Range and adjacent North Slope foreland basin, Alaska: Including fission track results from the Trans-Alaska Crustal Transect (TACT)

    USGS Publications Warehouse

    O'Sullivan, P. B.; Murphy, J.M.; Blythe, A.E.

    1997-01-01

    Apatite fission track data are used to evaluate the thermal and tectonic history of the central Brooks Range and the North Slope foreland basin in northern Alaska along the northern leg of the Trans-Alaska Crustal Transect (TACT). Fission track analyses of the detrital apatite grains in most sedimentary units resolve the timing of structures and denudation within the Brooks Range, ranging in scale from the entire mountain range to relatively small-scale folds and faults. Interpretation of the results indicates that rocks exposed within the central Brooks Range cooled rapidly from paleotemperatures 110?? to 50??C during discrete episodes at ???100??5 Ma, ???60??4 Ma, and ???24??3 Ma, probably in response to kilometer-scale denudation. North of the mountain front, rocks in the southern half of the foreland basin were exposed to maximum paleotemperatures 110??C in the Late Cretaceous to early Paleocene as a result of burial by Upper Jurassic and Cretaceous sedimentary rocks. Rapid cooling from these elevated paleotemperatures also occurred due to distinct episodes of kilometer-scale denudation at ???60??4 Ma, 46??3 Ma, 35??2 Ma, and ???24??3 Ma. Combined, the apatite analyses indicate that rocks exposed along the TACT line through the central Brooks Range and foreland basin experienced episodic rapid cooling throughout the Late Cretaceous and Cenozoic in response to at least three distinct kilometer-scale denudation events. Future models explaining orogenic events in northern Alaska must consider these new constraints from fission track thermochronology. Copyright 1997 by the American Geophysical Union.

  16. RESULTS FOR THE INTERMEDIATE-SPECTRUM ZEUS BENCHMARK OBTAINED WITH NEW 63,65Cu CROSS-SECTION EVALUATIONS

    SciTech Connect

    Sobes, Vladimir [ORNL] [ORNL; Leal, Luiz C [ORNL] [ORNL

    2014-01-01

    The four HEU, intermediate-spectrum, copper-reflected Zeus experiments have shown discrepant results between measurement and calculation for the last several major releases of the ENDF library. The four benchmarks show a trend in reported C/E values with increasing energy of average lethargy causing fission. Recently, ORNL has made improvements to the evaluations of three key isotopes involved in the benchmark cases in question. Namely, an updated evaluation for 235U and evaluations of 63,65Cu. This paper presents the benchmarking results of the four intermediate-spectrum Zeus cases using the three updated evaluations.

  17. Late Miocene Recent exhumation of the central Himalaya and recycling in the foreland basin assessed by apatite fission-track thermochronology of

    E-print Network

    Boyer, Edmond

    Late Miocene ­ Recent exhumation of the central Himalaya and recycling in the foreland basin Miocene to Pliocene stratigraphic sections of the Siwalik Group in western and central Nepal, as well), others have suggested that fluxes have been decreasing since reaching a peak in middle-late Miocene times

  18. Track reconstruction at the ILC: the ILD tracking software

    NASA Astrophysics Data System (ADS)

    Gaede, Frank; Aplin, Steven; Glattauer, Robin; Rosemann, Christoph; Voutsinas, Georgios

    2014-06-01

    One of the key requirements for Higgs physics at the International Linear Collider ILC is excellent track reconstruction with very good momentum and impact parameter resolution. ILD is one of the two detector concepts at the ILC. Its central tracking system comprises of an outer Si-tracker, a highly granular TPC, an intermediate silicon tracker and a pixel vertex detector, and it is complemented by silicon tracking disks in the forward direction. Large hit densities from beam induced coherent electron-positron pairs at the ILC pose an additional challenge to the pattern recognition algorithms. We present the recently developed new ILD tracking software, the pattern recognition algorithms that are using clustering techniques, Cellular Automatons and Kalman filter based track extrapolation. The performance of the ILD tracking system is evaluated using a detailed simulation including dead material, gaps and imperfections.

  19. Animal Tracks

    NSDL National Science Digital Library

    For those of us living in Northern climates, when winter snow covers the landscape it provides great conditions to search for animal tracks. The following websites provide an abundance of information and resources about the ancient art of animal tracking.The first site(1 ), Beartracker's Animal Tracks Den, is an excellent comprehensive "online field guide to tracks and tracking." The site includes animal track images, photos, as well as information about mammals, reptiles, birds, insects, amphibians, and other tracking resources. The second site (2), is an article by Jon C. Boren, Extension Wildlife Specialist and Byron D. Wright, Agricultural Specialist both from the University of New Mexico entitled Identifying and Preserving Wildlife Tracks. The third site (3), on Tracking and Stalking Wildlife, comes from The Virtual Cub Scout Leader's Handbook and provides short information pages on a variety on animals including photos and images of tracks. The fourth site (4) is a well-organized lesson plan with activities on Animal Signs from Eagle Bluff Environmental Learning Center. The fifth site (5) is the Outdoor Action Guide to Animal Tracking by Rick Curtis of Princeton University. This website provides solid and detailed information on many aspects of animal tracking including parts of a track, pattern classification, aging tracks, and more. The sixth site (6) is an article by veteran tracker Jim Halfpenny, Ph.D. about how to determine the accurate track size for an animal. Site visitors can link from this article to the homepage for A Naturalist's World which has information about tracking classes offered in various North American locations. For anyone interested in developing their animal tracking skills, the final two websites also offer courses from very experienced trackers in different regions of North America. The seventh site (7), Tom Brown's Tracker School is the largest school of its kind with locations in New Jersey, California, and Florida. The eighth site, (8) Wilderness Awareness School is located in Washington but offers courses in other regions as well. This website also provides an extensive list of links for many other tracking resources.

  20. Climatic Changes from 12,000 to 4,000 Years Ago in the Austrian Central Alps Tracked by Sedimentological and Biological Proxies of a Lake Sediment Core

    Microsoft Academic Search

    Roland Schmidt; Christian Kamenik; Richard Tessadri; Karin Anne Koinig

    2006-01-01

    Major and trace elements, minerals, and grain-size were analysed from the early to mid-Holocene (12 to 4 ky BP) period of\\u000a a sediment core from the Alpine lake Oberer Landschitzsee (ObLAN, 2076 m a.s.l.), which is located on predominantly crystalline\\u000a bedrock on the southern slopes of the Austrian Central Alps. Geochemistry and mineralogy were compared with diatom-inferred\\u000a (Di-) ‘date of autumn mixing’

  1. Tandem tracking

    USGS Multimedia Gallery

    Biologist Sabrina Davenport tandem tracks the Lower Missouri River during high water on June 2, 2011.  Two boats (note boat out window) tracking in tandem can detect fish effectively across a wider river and can turn to search behind wing dikes and sandbars where sturgeon can hide during h...

  2. Numerical simulations of anisotropic plasmas using a modified ZEUS-MP

    NASA Astrophysics Data System (ADS)

    Chandran, Benjamin; Tangri, Varun; Sarkar, Aveek; Perez, Jean; Sharma, Prateek

    2012-10-01

    Three dimensional linear and nonlinear simulations of collisionless one-fluid plasmas with pressure anisotropy are presented using the Chew- Goldberger-Low (CGL-MHD) and double-isothermal models. For this purpose, the code ZEUS-MP [J. C. Hayes et. al. The APJ Supplement Series 165 (2006) 188.] has been modified. Major modifications include a changed method of characteristics, new compressive and non-compressive forces, and a ``hard wall'' limit on pressure anisotropy that is intended to mimic the effects of plasma micro-instabilities that limit the temperature anisotropy. For purposes of validation, more than 100 test simulations of linear waves (Alfven, slow and fast), instabilities (firehose and mirror) and nonlinear vortices (Orszag-Tang) are presented for a number of initial conditions and parameters. Finally, this model is used to investigate the way that Alfven-wave turbulence leads to a spreading of the temperature-anisotropy probability distribution in the solar wind. Analysis is completed with a detailed analysis of the fluctuation data.

  3. Factor Track

    NSDL National Science Digital Library

    This problem helps learners improve their knowledge of factors, especially those in the usual multiplication tables, and encourages the problem solving strategy of trial and error. The goal of the game is to go around the track in as few moves as possible, keeping to the rules that a player can move any number of spaces which is a factor of the number the player is on, except 1. There is a "training" track to play on initially to see the rules in action and then a more complicated track for players to use. The Teachers' Notes page offers suggestions for implementation, key discussion questions, ideas for extension and support.

  4. ROSETTA: Robust And Secure Mobile Target Tracking In A Wireless Ad Hoc Environment

    E-print Network

    Misra, Satyajayant

    1 ROSETTA: Robust And Secure Mobile Target Tracking In A Wireless Ad Hoc Environment Satyajayant track- ing of a mobile target by a central authority, using distance estimates obtained by a group mobile target tracking. Target tracking aims to track and localize a mobile node moving inside a network

  5. Situational Awareness: Personalizing Issue Tracking Systems

    E-print Network

    Godfrey, Michael W.

    Situational Awareness: Personalizing Issue Tracking Systems Olga Baysal, Reid Holmes, and Michael W of Waterloo, Canada {obaysal, rtholmes, migod}@cs.uwaterloo.ca Abstract--Issue tracking systems play a central role in ongoing software development; they are used by developers to support collaborative bug fixing

  6. Transit Tracks

    NSDL National Science Digital Library

    Lawrence Hall of Science

    2008-01-01

    In this space science activity, learners explore transits and the conditions when a transit may be seen. Learners use models to investigate how a planet's size and distance from its star affects the behavior of transits. Learners also use mathematics to interpret graphs of brightness vs. time to deduce information about planet-star systems. This lesson includes educator instructions, photocopy masters for Transit Light Curves, Option Math for Transit Tracks, Kepler’s 3rd Law graphs, cube root tables, an account of Jeremiah Horrocks' 1639 observation of the transit of Venus, and an answer key for the Transit Tracks Light Curves.

  7. A Parallel Particle Tracking Framework for Applications in Scientific Computing

    Microsoft Academic Search

    Jing-ru C. Cheng; Paul E. Plassmann

    2004-01-01

    Particle tracking methods are a versatile computational technique central to the simulation of a wide range of scientific applications. In this paper, we present a new parallel particle tracking framework for the applications of scientific computing. The framework includes the “in-element” particle tracking method, which is based on the assumption that particle trajectories are computed by problem data localized to

  8. Fraction Tracks

    NSDL National Science Digital Library

    WGBH Boston

    1996-01-01

    This 17:29 minute video from the classic Annenberg Learner series illustrates the practice standard of communication about mathematics among a teacher and her students as they learn and play the "fraction tracks" game. The video also shows how activities like this allow students to use communication as a tool to deepen their understanding of mathematics. Three analysis questions are given at the end of the video to promote dialogue among teachers of mathematics.

  9. Person Tracking

    Microsoft Academic Search

    Keni Bernardin; Rainer Stiefelhagen; Aristodemos Pnevmatikakis; Oswald Lanz; Alessio Brutti; Josep R. Casas; Gerasimos Potamianos

    2009-01-01

    \\u000a One of the most basic building blocks for the understanding of human actions and interactions is the accurate detection and\\u000a tracking of persons in a scene. In constrained scenarios involving at most one subject, or in situations where persons can\\u000a be confined to a controlled monitoring space or required to wear markers, sensors, or microphones, these tasks can be solved

  10. Agent consumption with the Zeus® in the automated closed circuit anesthesia mode with O2/air mixtures

    PubMed Central

    2014-01-01

    Background Earlier software versions of the Zeus® (Lübeck, Dräger, Germany) failed to provide true closed circuit anesthesia (CCA) conditions. We examined whether the latest software (SW 4.03 MK 04672–00) achieves this goal. Methods In 8 ASA I–III patients, the CCA mode of the Zeus® was used to maintain the inspired O2 (FIO2) and end-expired sevoflurane % (FAsevo) at 50 and 1.8%, respectively. The fresh gas flow (FGF) of O2 and air and the sevoflurane injection rate (=Vinjsevo, mL liquid sevo/h) were videotaped from the control screen and entered offline into a spreadsheet. Cumulative sevoflurane usage during early wash-in (=0-1 min, CDsevo0-1), late wash-in (=1-5 min, CDsevo1-5), and maintenance (=5-60 min, CDsevo5-60) was calculated, and Vinjsevo between 1 and 60 min was compared with published uptake data. Results FAsevo reached 1.8% within 101 (23) sec. CDsevo0-1 was between 1.24 (0.03) and 3.01(0.25) mL (a range is provided because no absolute Vinjsevo values were displayed once Vinjsevo was?>?100 mL/h, which occurred between 15?±?2 and 46?±?6 sec). CDsevo1-5 was 0.81 (0.37) mL, and CDsevo5-60 was 4.63 (0.94) mL. The Vinjsevo pattern between 1 and 60 min matched previously published uptake data. Brief high FGF periods were used to maintain the target FIO2, and to refill the reservoir bag after external pressure had been applied to the abdomen; subsequent “spikes” wasted 0.08-0.19 mL and 0.14-0.49 mL sevoflurane (1-3% and 3-9% of total agent usage between 1 and 60 min, respectively). Conclusion Under the conditions specified, the Zeus® approaches CCA conditions so closely that further reductions in agent usage would have minimal economic significance. PMID:25056252

  11. Making Tracks

    NSDL National Science Digital Library

    Stephen Greb

    In this activity, students will make trackways by running across sheets of paper; their classmates will then determine what they can interpret from the trackways. The students discover that fossils are evidence of ancient life which is usually preserved in stone and that when most people think about fossils, they think about bones and skeletons. Students learn that not all fossils are the body parts of ancient organisms and that a very important type of fossil is called a trace fossil, scientifically termed an ichnofossil, the tracks or trails an organism leaves behind.

  12. Measurement of neutral current cross sections at high Bjorken-x with the ZEUS detector at HERA

    NASA Astrophysics Data System (ADS)

    Chekanov, S.; Derrick, M.; Magill, S.; Miglioranzi, S.; Musgrave, B.; Nicholass, D.; Repond, J.; Yoshida, R.; Mattingly, M. C. K.; Pavel, N.; Molina, A. G. Y.; Antonelli, S.; Antonioli, P.; Bari, G.; Basile, M.; Bellagamba, L.; Bindi, M.; Boscherini, D.; Bruni, A.; Bruni, G.; Cifarelli, L.; Cindolo, F.; Contin, A.; Corradi, M.; de Pasquale, S.; Iacobucci, G.; Margotti, A.; Nania, R.; Polini, A.; Rinaldi, L.; Sartorelli, G.; Zichichi, A.; Aghuzumtsyan, G.; Bartsch, D.; Brock, I.; Goers, S.; Hartmann, H.; Hilger, E.; Jakob, H.-P.; Jüngst, M.; Kind, O. M.; Paul, E.; Rautenberg, J.; Renner, R.; Samson, U.; Schönberg, V.; Wang, M.; Wlasenko, M.; Brook, N. H.; Heath, G. P.; Morris, J. D.; Namsoo, T.; Capua, M.; Fazio, S.; Mastroberardino, A.; Schioppa, M.; Susinno, G.; Tassi, E.; Kim, J. Y.; Ma, K. J.; Ibrahim, Z. A.; Kamaluddin, B.; Wan Abdullah, W. A. T.; Ning, Y.; Ren, Z.; Sciulli, F.; Chwastowski, J.; Eskreys, A.; Figiel, J.; Galas, A.; Gil, M.; Olkiewicz, K.; Stopa, P.; Zawiejski, L.; Adamczyk, L.; Bo?d, T.; Grabowska-Bo?d, I.; Kisielewska, D.; ?ukasik, J.; Przybycie?, M.; Suszycki, L.; Kota?ski, A.; S?omi?ski, W.; Adler, V.; Behrens, U.; Bloch, I.; Bonato, A.; Borras, K.; Coppola, N.; Fourletova, J.; Geiser, A.; Gladkov, D.; Göttlicher, P.; Gregor, I.; Gutsche, O.; Haas, T.; Hain, W.; Horn, C.; Kahle, B.; Kötz, U.; Kowalski, H.; Lim, H.; Lobodzinska, E.; Löhr, B.; Mankel, R.; Melzer-Pellmann, I.-A.; Montanari, A.; Nguyen, C. N.; Notz, D.; Nuncio-Quiroz, A. E.; Santamarta, R.; Schneekloth, U.; Spiridonov, A.; Stadie, H.; Stösslein, U.; Szuba, D.; Szuba, J.; Theedt, T.; Watt, G.; Wolf, G.; Wrona, K.; Youngman, C.; Zeuner, W.; Schlenstedt, S.; Barbagli, G.; Gallo, E.; Pelfer, P. G.; Bamberger, A.; Dobur, D.; Karstens, F.; Vlasov, N. N.; Bussey, P. J.; Doyle, A. T.; Dunne, W.; Ferrando, J.; Saxon, D. H.; Skillicorn, I. O.; Gialas, I.; Gosau, T.; Holm, U.; Klanner, R.; Lohrmann, E.; Salehi, H.; Schleper, P.; Schörner-Sadenius, T.; Sztuk, J.; Wichmann, K.; Wick, K.; Kataoka, M.; Matsumoto, T.; Nagano, K.; Tokushuku, K.; Yamada, S.; Yamazaki, Y.; Foudas, C.; Fry, C.; Long, K. R.; Tapper, A. D.; Barakbaev, A. N.; Boos, E. G.; Dossanov, A.; Pokrovskiy, N. S.; Zhautykov, B. O.; Son, D.; de Favereau, J.; Piotrzkowski, K.; Barreiro, F.; Glasman, C.; Jimenez, M.; Labarga, L.; Del Peso, J.; Ron, E.; Terrón, J.; Zambrana, M.; Corriveau, F.; Liu, C.; Walsh, R.; Zhou, C.; Tsurugai, T.; Antonov, A.; Dolgoshein, B. A.; Rubinsky, I.; Sosnovtsev, V.; Stifutkin, A.; Suchkov, S.; Dementiev, R. K.; Ermolov, P. F.; Gladilin, L. K.; Katkov, I. I.; Khein, L. A.; Korzhavina, I. A.; Kuzmin, V. A.; Levchenko, B. B.; Lukina, O. Y.; Proskuryakov, A. S.; Shcheglova, L. M.; Zotkin, D. S.; Zotkin, S. A.; Abt, I.; Büttner, C.; Caldwell, A.; Kollar, D.; Schmidke, W. B.; Sutiak, J.; Grigorescu, G.; Keramidas, A.; Koffeman, E.; Kooijman, P.; Pellegrino, A.; Tiecke, H.; Vázquez, M.; Wiggers, L.; Brümmer, N.; Bylsma, B.; Durkin, L. S.; Lee, A.; Ling, T. Y.; Allfrey, P. D.; Bell, M. A.; Cooper-Sarkar, A. M.; Cottrell, A.; Devenish, R. C. E.; Foster, B.; Gwenlan, C.; Korcsak-Gorzo, K.; Patel, S.; Roberfroid, V.; Robertson, A.; Straub, P. B.; Uribe-Estrada, C.; Walczak, R.; Bellan, P.; Bertolin, A.; Brugnera, R.; Carlin, R.; Ciesielski, R.; Dal Corso, F.; Dusini, S.; Garfagnini, A.; Limentani, S.; Longhin, A.; Stanco, L.; Turcato, M.; Oh, B. Y.; Raval, A.; Whitmore, J. J.; Iga, Y.; D'Agostini, G.; Marini, G.; Nigro, A.; Cole, J. E.; Hart, J. C.; Abramowicz, H.; Gabareen, A.; Ingbir, R.; Kananov, S.; Levy, A.; Kuze, M.; Hori, R.; Kagawa, S.; Shimizu, S.; Tawara, T.; Hamatsu, R.; Kaji, H.; Kitamura, S.; Ota, O.; Ri, Y. D.; Ferrero, M. I.; Monaco, V.; Sacchi, R.; Solano, A.; Arneodo, M.; Ruspa, M.; Fourletov, S.; Martin, J. F.; Boutle, S. K.; Butterworth, J. M.; Hall-Wilton, R.; Jones, T. W.; Loizides, J. H.; Sutton, M. R.; Targett-Adams, C.; Wing, M.; Brzozowska, B.; Ciborowski, J.; Grzelak, G.; Kulinski, P.; ?u?niak, P.; Malka, J.; Nowak, R. J.; Pawlak, J. M.; Tymieniecka, T.; Ukleja, A.; Ukleja, J.; ?arnecki, A. F.; Adamus, M.; Plucinski, P.; Eisenberg, Y.; Giller, I.; Hochman, D.; Karshon, U.; Rosin, M.; Brownson, E.; Danielson, T.; Everett, A.; Kçira, D.; Reeder, D. D.; Ryan, P.; Savin, A. A.; Smith, W. H.; Wolfe, H.; Bhadra, S.; Catterall, C. D.; Cui, Y.; Hartner, G.; Menary, S.; Noor, U.; Soares, M.; Standage, J.; Whyte, J.

    2007-01-01

    A new method is employed to measure the neutral current cross section up to Bjorken-x values of one with the ZEUS detector at HERA using an integrated luminosity of 65.1 pb-1 for e+p collisions and 16.7 pb-1 for e-p collisions at sqrt{s}=318 GeV and 38.6 pb-1 for e+p collisions at sqrt{s}=300 GeV. Cross sections have been extracted for Q2?648 GeV2 and are compared to predictions using different parton density functions. For the highest x bins, the data have a tendency to lie above the expectations using recent parton density function parametrizations.

  13. Measurement of beauty production in DIS and [InlineEquation not available: see fulltext.] extraction at ZEUS

    NASA Astrophysics Data System (ADS)

    Abramowicz, H.; Abt, I.; Adamczyk, L.; Adamus, M.; Aggarwal, R.; Antonelli, S.; Antonioli, P.; Antonov, A.; Arneodo, M.; Aushev, V.; Aushev, Y.; Bachynska, O.; Bamberger, A.; Barakbaev, A. N.; Barbagli, G.; Bari, G.; Barreiro, F.; Bartsch, D.; Basile, M.; Behnke, O.; Behr, J.; Behrens, U.; Bellagamba, L.; Bertolin, A.; Bhadra, S.; Bindi, M.; Blohm, C.; Bo?d, T.; Boos, E. G.; Borodin, M.; Borras, K.; Boscherini, D.; Bot, D.; Boutle, S. K.; Brock, I.; Brownson, E.; Brugnera, R.; Brümmer, N.; Bruni, A.; Bruni, G.; Brzozowska, B.; Bussey, P. J.; Butterworth, J. M.; Bylsma, B.; Caldwell, A.; Capua, M.; Carlin, R.; Catterall, C. D.; Chekanov, S.; Chwastowski, J.; Ciborowski, J.; Ciesielski, R.; Cifarelli, L.; Cindolo, F.; Contin, A.; Cooper-Sarkar, A. M.; Coppola, N.; Corradi, M.; Corriveau, F.; Costa, M.; D'Agostini, G.; Dal Corso, F.; de Favereau, J.; Del Peso, J.; Dementiev, R. K.; de Pasquale, S.; Derrick, M.; Devenish, R. C. E.; Dobur, D.; Dolgoshein, B. A.; Doyle, A. T.; Drugakov, V.; Durkin, L. S.; Dusini, S.; Eisenberg, Y.; Ermolov, P. F.; Eskreys, A.; Fang, S.; Fazio, S.; Ferrando, J.; Ferrero, M. I.; Figiel, J.; Forrest, M.; Foster, B.; Fourletov, S.; Gach, G.; Galas, A.; Gallo, E.; Garfagnini, A.; Geiser, A.; Gialas, I.; Gladilin, L. K.; Gladkov, D.; Glasman, C.; Gogota, O.; Golubkov, Yu. A.; Göttlicher, P.; Grabowska-Bo?d, I.; Grebenyuk, J.; Gregor, I.; Grigorescu, G.; Grzelak, G.; Gwenlan, C.; Haas, T.; Hain, W.; Hamatsu, R.; Hart, J. C.; Hartmann, H.; Hartner, G.; Hilger, E.; Hochman, D.; Holm, U.; Hori, R.; Horton, K.; Hüttmann, A.; Iacobucci, G.; Ibrahim, Z. A.; Iga, Y.; Ingbir, R.; Ishitsuka, M.; Jakob, H.-P.; Januschek, F.; Jimenez, M.; Jones, T. W.; Jüngst, M.; Kadenko, I.; Kahle, B.; Kamaluddin, B.; Kananov, S.; Kanno, T.; Karshon, U.; Karstens, F.; Katkov, I. I.; Kaur, M.; Kaur, P.; Keramidas, A.; Khein, L. A.; Kim, J. Y.; Kisielewska, D.; Kitamura, S.; Klanner, R.; Klein, U.; Koffeman, E.; Kollar, D.; Kooijman, P.; Korol, Ie.; Korzhavina, I. A.; Kota?ski, A.; Kötz, U.; Kowalski, H.; Kulinski, P.; Kuprash, O.; Kuze, M.; Kuzmin, V. A.; Lee, A.; Levchenko, B. B.; Levy, A.; Libov, V.; Limentani, S.; Ling, T. Y.; Lisovyi, M.; Lobodzinska, E.; Lohmann, W.; Löhr, B.; Lohrmann, E.; Loizides, J. H.; Long, K. R.; Longhin, A.; Lontkovskyi, D.; Lukina, O. Yu.; ?u?niak, P.; Maeda, J.; Magill, S.; Makarenko, I.; Malka, J.; Mankel, R.; Margotti, A.; Marini, G.; Martin, J. F.; Mastroberardino, A.; Matsumoto, T.; Mattingly, M. C. K.; Melzer-Pellmann, I.-A.; Miglioranzi, S.; Mohamad Idris, F.; Monaco, V.; Montanari, A.; Morris, J. D.; Musgrave, B.; Nagano, K.; Namsoo, T.; Nania, R.; Nicholass, D.; Nigro, A.; Ning, Y.; Noor, U.; Notz, D.; Nowak, R. J.; Nuncio-Quiroz, A. E.; Oh, B. Y.; Okazaki, N.; Oliver, K.; Olkiewicz, K.; Onishchuk, Yu.; Ota, O.; Papageorgiu, K.; Parenti, A.; Paul, E.; Pawlak, J. M.; Pawlik, B.; Pelfer, P. G.; Pellegrino, A.; Perlanski, W.; Perrey, H.; Piotrzkowski, K.; Plucinski, P.; Pokrovskiy, N. S.; Polini, A.; Proskuryakov, A. S.; Przybycie?, M.; Raval, A.; Reeder, D. D.; Reisert, B.; Ren, Z.; Repond, J.; Ri, Y. D.; Robertson, A.; Roloff, P.; Ron, E.; Rubinsky, I.; Ruspa, M.; Sacchi, R.; Salii, A.; Samson, U.; Sartorelli, G.; Savin, A. A.; Saxon, D. H.; Schioppa, M.; Schlenstedt, S.; Schleper, P.; Schmidke, W. B.; Schneekloth, U.; Schönberg, V.; Schörner-Sadenius, T.; Schwartz, J.; Sciulli, F.; Shcheglova, L. M.; Shehzadi, R.; Shimizu, S.; Singh, I.; Skillicorn, I. O.; S?omi?ski, W.; Smith, W. H.; Sola, V.; Solano, A.; Son, D.; Sosnovtsev, V.; Spiridonov, A.; Stadie, H.; Stanco, L.; Stern, A.; Stewart, T. P.; Stifutkin, A.; Stopa, P.; Suchkov, S.; Susinno, G.; Suszycki, L.; Sztuk, J.; Szuba, D.; Szuba, J.; Tapper, A. D.; Tassi, E.; Terrón, J.; Theedt, T.; Tiecke, H.; Tokushuku, K.; Tomalak, O.; Tomaszewska, J.; Tsurugai, T.; Turcato, M.; Tymieniecka, T.; Uribe-Estrada, C.; Vázquez, M.; Verbytskyi, A.; Viazlo, V.; Vlasov, N. N.; Volynets, O.; Walczak, R.; Wan Abdullah, W. A. T.; Whitmore, J. J.; Whyte, J.; Wiggers, L.; Wing, M.; Wlasenko, M.; Wolf, G.; Wolfe, H.; Wrona, K.; Yagües-Molina, A. G.; Yamada, S.; Yamazaki, Y.; Yoshida, R.; Youngman, C.; ?arnecki, A. F.; Zawiejski, L.; Zenaiev, O.; Zeuner, W.; Zhautykov, B. O.; Zhmak, N.; Zhou, C.; Zichichi, A.; Zolko, M.; Zotkin, D. S.; Zulkapli, Z.; ZEUS Collaboration

    2010-10-01

    Beauty production in deep inelastic scattering with events in which a muon and a jet are observed in the final state has been measured with the ZEUS detector at HERA using an integrated luminosity of 114 pb-1. The fraction of events with beauty quarks in the data was determined using the distribution of the transverse momentum of the muon relative to the jet. The cross section for beauty production was measured in the kinematic range of photon virtuality, Q 2>2 GeV2, and inelasticity, 0.05< y<0.7, with the requirement of a muon and a jet. Total and differential cross sections are presented and compared to QCD predictions. The beauty contribution to the structure function F 2 was extracted and is compared to theoretical predictions.

  14. Kernel-Based Object Tracking

    Microsoft Academic Search

    Dorin Comaniciu; Visvanathan Ramesh; Peter Meer

    2003-01-01

    A new approach toward target representation and localization, the central component in visual tracking of nonrigid objects, is proposed. The feature histogram-based target representations are regularized by spatial masking with an isotropic kernel. The masking induces spatially-smooth similarity functions suitable for gradient-based optimization, hence, the target localization problem can be formulated using the basin of attraction of the local maxima.

  15. VLT tracking and guiding software

    NASA Astrophysics Data System (ADS)

    Gilli, Bruno

    1995-06-01

    The VLT must provide high quality images in a wide range of operating conditions and for a number of different modes. Performances of tracking and guiding impacts heavily on the final image quality. Control of the tracking axis is implemented in VME controllers, one per axis. They are accurately synchronized with a central time distribution system. This allows each axis to operate independently from the others, deriving its own position from the star coordinates and the time. This coordinate transformation includes basic corrections like refraction and pointing model compensations. To improve tracking performances, guiding devices (guiding cameras located in the adapter, or even instrument detector itself) can be used to measure position errors and derive small corrections for tracking. These corrections can be applied either to the secondary mirror, or to the tracking axis. To coordinate all these activities, the VMEs are connected through several LANs together with supervising workstations. While the basic functionality is controlled by applications implemented in the VMEs running a real time commercial operating system: VxWorks, the presentation layer and the non time critical operations can be implemented on workstations running standard Unix. The distribution of control software on VMEs or workstations is then dictated by real time constraints and/or availability of proved solutions for one of the operating system. This paper presents the choices in the hardware and software architectures, as well as the design concepts, made to support the different operational modes and fulfill the performance requirements.

  16. Radio tracking system

    NASA Technical Reports Server (NTRS)

    Breidenthal, J. C.; Komarek, T. A.

    1982-01-01

    The principles and techniques of deep space radio tracking are described along with the uses of tracking data in navigation and radio science. Emphasis is placed on the measurement functions of radio tracking.

  17. Dissertation Optical Tracking

    E-print Network

    mechanical tracking systems are extremely precise, magnetic and acoustic tracking systems suffer from and external camera parameters simultaneously, including lens distortion parameters. The calibration is very

  18. 22.10.2003 A.Geiser, ZEUS potential for Heavy Quarks at HERA II 1 =(86 SRWHQWLDO IRU +HDY\\ 4XDUNV

    E-print Network

    Simulation 2002/3 Data2002/3 Data #Tracks#Tracks > 4 MVD hits> 4 MVD hits > 2 MVD hits> 2 MVD hits All CTD tracksAll CTD tracks Note: Acceptance holesNote: Acceptance holes Efficiency estimates from NC DIS: (Tracks in CTD and MVDEfficiency estimates from NC DIS: (Tracks in CTD and MVD fiducialfiducial)) > 4 MVD hits> 4

  19. Archaeological elements of Mt. Lykaion Sanctuary of Zeus (southern Peloponnesus) in relation to tectonics and structural geology

    NASA Astrophysics Data System (ADS)

    Davis, G. H.

    2008-07-01

    The Sanctuary of Zeus is the focus of the Mt. Lykaion Excavation/Survey (University of Pennsylvania, University of Arizona, and 39th Ephorate of Prehistoric and Classical Antiquities). It was described by Pausanias as a sacred place of pan-Hellenic significance, with stadium and hippodrome in which athletic games were held, a sanctuary of Pan, and a formidable temenos and altar of Lykaion Zeus. In picturing human activity on this mountain during ancient times, it is not adequate to treat the mountain as if it were simply a tall, symmetrical, and handy edifice within which rock contents are irrelevant, for the geology within Mt. Lykaion significantly influenced what was built on it, and where! There are contemporary reminders of the 'power' of the site, including the devastating April, 1965, Megalopolis earthquake, the epicenter of which was merely 4 km away. In fact, there are active normal faults within the sanctuary. However the primary geoarchitecture is that of the Pindos fold and thrust belt, fashioned largely in Cretaceous through Eocene. Mt. Lykaion's dome-like summit is a thrust klippe separated from underlying nappes by a major thrust fault (Lykaion thrust), the subhorizontal trace of which encircles the mountain creating a subtle bench in the landscape coinciding closely with archaeological and natural elements important to the sanctuary (e.g., stoa, seatwall, fountains, trails). Late Jurassic through Eocene 'Pindos Group' formations are stacked and repeated by the thrusting. Inter-relationships between bedrock, structure, and archaeology are revealed in a 'geoarchaeological column,' which displays positioning of elements in relation to the thrust, and orientations of rock formations in relation to flat patches in otherwise steep, rocky country, which became sites suitable for placement of hippodrome, baths, temenos, horse pasturing areas, etc. Worked limestone blocks are locally derived and can be matched with formations. The compelling high elevation of the ash altar is testimony to residual crustal buoyancy achieved through 'Pindos' crustal shortening, and the steep processional ascent to the altar speaks to regional active normal faulting and rapid erosion.

  20. 27. INTERIOR VIEW OF DRAWTENDER'S SHACK LOOKING AT MAIN TRACK ...

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

    27. INTERIOR VIEW OF DRAWTENDER'S SHACK LOOKING AT MAIN TRACK AND SIGNAL CONTROL LEVERS AND INDICATOR LIGHTS - Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newark Bay, Newark, Essex County, NJ

  1. Multi-Object Tracking via Species Based Particle Swarm Optimization

    Microsoft Academic Search

    Xiaoqin Zhang; Weiming Hu; Wei Li; Steve Maybank

    2009-01-01

    Multiple object tracking is particularly challenging when many objects with similar appearances occlude one another. Most existing approaches concatenate the states of different objects, view the multi-object tracking as a joint motion estimation problem and search for the best state of the joint motion in a rather high dimensional space. How- ever, this centralized framework suffers a great computa- tional

  2. Multiple Object Tracking Via Species-Based Particle Swarm Optimization

    Microsoft Academic Search

    Xiaoqin Zhang; Weiming Hu; Wei Qu; Steve J. Maybank

    2010-01-01

    Multiple object tracking is particularly challenging when many objects with similar appearances occlude one another. Most existing approaches concatenate the states of different objects, view the multi-object tracking as a joint motion estimation problem and search for the best state of the joint motion in a rather high dimensional space. However, this centralized framework suffers from a high computational load.

  3. A real-time open-source video tracking system

    Microsoft Academic Search

    Barry R. Secrest; Juan R. Vasquez; Thomas F. Fulton; Douglas A. Summers-Stay

    2007-01-01

    Video tracking is used in military operations and homeland defense. Multiple cameras are mounted on an airplane that flies in a circle and points to a central location. The images are pre-registered and a single large image is sent to a ground station at the rate of a frame per second. The first step needed for tracking is measurements. The

  4. TrackEye tracking algorithm characterization.

    SciTech Connect

    Reed, Jack W.; Shields, Rob W; Valley, Michael T.

    2004-08-01

    TrackEye is a film digitization and target tracking system that offers the potential for quantitatively measuring the dynamic state variables (e.g., absolute and relative position, orientation, linear and angular velocity/acceleration, spin rate, trajectory, angle of attack, etc.) for moving objects using captured single or dual view image sequences. At the heart of the system is a set of tracking algorithms that automatically find and quantify the location of user selected image details such as natural test article features or passive fiducials that have been applied to cooperative test articles. This image position data is converted into real world coordinates and rates with user specified information such as the image scale and frame rate. Though tracking methods such as correlation algorithms are typically robust by nature, the accuracy and suitability of each TrackEye tracking algorithm is in general unknown even under good imaging conditions. The challenges of optimal algorithm selection and algorithm performance/measurement uncertainty are even more significant for long range tracking of high-speed targets where temporally varying atmospheric effects degrade the imagery. This paper will present the preliminary results from a controlled test sequence used to characterize the performance of the TrackEye tracking algorithm suite.

  5. TrackEye tracking algorithm characterization

    NASA Astrophysics Data System (ADS)

    Valley, Michael T.; Shields, Robert W.; Reed, Jack M.

    2004-10-01

    TrackEye is a film digitization and target tracking system that offers the potential for quantitatively measuring the dynamic state variables (e.g., absolute and relative position, orientation, linear and angular velocity/acceleration, spin rate, trajectory, angle of attack, etc.) for moving objects using captured single or dual view image sequences. At the heart of the system is a set of tracking algorithms that automatically find and quantify the location of user selected image details such as natural test article features or passive fiducials that have been applied to cooperative test articles. This image position data is converted into real world coordinates and rates with user specified information such as the image scale and frame rate. Though tracking methods such as correlation algorithms are typically robust by nature, the accuracy and suitability of each TrackEye tracking algorithm is in general unknown even under good imaging conditions. The challenges of optimal algorithm selection and algorithm performance/measurement uncertainty are even more significant for long range tracking of high-speed targets where temporally varying atmospheric effects degrade the imagery. This paper will present the preliminary results from a controlled test sequence used to characterize the performance of the TrackEye tracking algorithm suite.

  6. Track and Field Dynamics. Second Edition.

    ERIC Educational Resources Information Center

    Ecker, Tom

    Track and field coaching is considered an art embodying three sciences--physiology, psychology, and dynamics. It is the area of dynamics, the branch of physics that deals with the action of force on bodies, that is central to this book. Although the book does not cover the entire realm of dynamics, the laws and principles that relate directly to…

  7. The minitrack tracking function description, volume 1

    NASA Technical Reports Server (NTRS)

    Englar, T. S., Jr.; Mango, S. A.; Roettcher, C. A.; Watters, D. L.

    1973-01-01

    The treatment of tracking data by the Minitrack system is described from the transmission of the nominal 136-MHz radio beacon energy from a satellite and the reception of this signal by the interferometer network through the ultimate derivation of the direction cosines (the angular coordinates of the vector from the tracking station to the spacecraft) as a function of time. Descriptions of some of the lesser-known functions operating on the system, such as the computer preprocessing program, are included. A large part of the report is devoted to the preprocessor, which provides for the data compression, smoothing, calibration correction, and ambiguity resolution of the raw interferometer phase tracking measurements teletyped from each of the worldwide Minitrack tracking stations to the central computer facility at Goddard Space Flight Center. An extensive bibliography of Minitrack hardware and theory is presented.

  8. Beartracker's Animal Tracks Den

    NSDL National Science Digital Library

    Beartracker's Animal Tracks Den is an excellent comprehensive "online field guide to tracks and tracking." The site includes animal track images, photos, as well as information about mammals, reptiles, birds, insects, amphibians, and other tracking resources. Most of the animals featured on the site are inhabitants of North America. Images of animal tracks also contain descriptions to help users become familiar with the distinctive qualities of each animal's print. This is an excellent resource for nature enthusiasts, animal search and rescue trackers, and everyone in between.

  9. Multiple hypothesis tracking for multiple target tracking

    Microsoft Academic Search

    SAMUEL S. BLACKMAN

    2004-01-01

    Multiple hypothesis tracking (MHT) is generally accepted as the preferred method for solving the data association problem in modern multiple target tracking (MTT) systems. This paper summarizes the motivations for MHT, the basic principles behind MHT and the alternative implementations in common use. It discusses the manner in which the multiple data association hypotheses formed by MHT can be combined

  10. Satellite-Retrieved Microstructure of AgI Seeding Tracks in Supercooled Layer Clouds DANIEL ROSENFELD

    E-print Network

    Daniel, Rosenfeld

    Satellite-Retrieved Microstructure of AgI Seeding Tracks in Supercooled Layer Clouds DANIEL revealed conspicuous tracks of glaciated cloud in thick supercooled layer clouds over central China. These tracks were identified as being artificially produced by cloud-seeding operations at the 10°C isotherm

  11. Sex-Offender Tracking

    MedlinePLUS

    ... Safety & Prevention Law Enforcement Training Victim & Family Support Sex Offender Tracking The primary goal of the National Center for Missing & Exploited Children's Sex Offender Tracking Team ® is to provide assistance to ...

  12. Introduction Object Tracking

    E-print Network

    Anderson, Charles H.

    ;Introduction ­ Vehicle Tracking Object Track vehicles on a highway Count them Implementation Real-time OpenCV with Shadow Detection" OpenCV implementation (without shadow detection) #12;Theory ­ Segmentation Background

  13. ERDC/CERLTR-05-33 Cattle Grazing and Tracked Vehicle Training

    E-print Network

    Fehmi, Jeffrey S.

    ERDC/CERLTR-05-33 Cattle Grazing and Tracked Vehicle Training on Central and Southwest U.S. Army is unlimited. #12;#12;ERDC/CERL TR-05-33 November 2005 Cattle Grazing and Tracked Vehicle Training on Central cattle grazing. Yet, no documented studies exist examining the interactive effects of these activities

  14. Solar tracking device

    Microsoft Academic Search

    Trihey

    1981-01-01

    Solar tracking apparatus is disclosed which utilizes received solar energy to effect tracking movements. The apparatus comprises focussing means, mounting means mounting the focussing means for tracking movements of the sun, and drive means including heat expansible members movable with the focussing means. The heat expansible members are disposed relative to the focussing means so as to receive different amounts

  15. Tracking Appearances with Occlusions

    Microsoft Academic Search

    Ying Wu; Ting Yu; Gang Hua

    2003-01-01

    Occlusion is a difficult problem for appearance-based target tracking, especially when we need to track multi- ple targets simultaneously and maintain the target identi- ties during tracking. To cope with the occlusion problem explicitly, this paper proposes a dynamic Bayesian network which accommodates an extra hidden process for occlusion and stipulates the conditions on which the image observa- tion likelihood

  16. Object tracking with stereo vision

    NASA Technical Reports Server (NTRS)

    Huber, Eric

    1994-01-01

    A real-time active stereo vision system incorporating gaze control and task directed vision is described. Emphasis is placed on object tracking and object size and shape determination. Techniques include motion-centroid tracking, depth tracking, and contour tracking.

  17. Q 2 evolution of parton distributions at small values of x: Effective scale for combined H1 and ZEUS data on the structure function F 2

    NASA Astrophysics Data System (ADS)

    Kotikov, A. V.; Shaikhatdenov, B. G.

    2015-06-01

    An expression for the structure function F 2 in the form of Bessel functions at small values of the Bjorken variable x is used. This expression was derived for a flat initial condition in the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution equations. The argument of the strong coupling constant was chosen in such a way as to annihilate the singular part of the anomalous dimensions in the next-to-leading-order of perturbation theory. This choice, together with the frozen and analytic versions of the strong coupling constant, is used to analyze combined data of the H1 and ZEUS Collaborations obtained recently for the structure function F 2.

  18. On optimal track-to-track fusion

    Microsoft Academic Search

    K. C. Chang; R. K. Saha; Y. Bar-Shalom

    1997-01-01

    Track-to-track fusion is an important part in multisensor fusion. Much research has been done in this area. Chong et al. (1979, 1986, 1990) among others, presented an optimal fusion formula under an arbitrary communication pattern. This formula is optimal when the underlying systems are deterministic, i.e., the process noise is zero, or when full-rate communication (two sensors exchange information each

  19. Fast Track: The Right Track for America

    NSDL National Science Digital Library

    1998-01-01

    Fast Track is an advocacy site aimed at generating support for granting fast-track authority to the President. It contains articles and speeches in support of free trade. Recently, the debate over free trade has intensified in light of the failure of President Clinton to obtain fast-track authority from Congress. On September 17, 1997, President Clinton went against the liberals in his own party to request fast-track authority from Congress to negotiate new trade accords. The Senate approved the President's request for fast track on November 5, 1997 but the vote in the House was shelved when it appeared likely that fast-track would be defeated. The opponents of free-trade consist mainly of trade unions who are worried about the loss of jobs to countries with cheap labor, and environmentalists concerned about the effect of free trade on environmental standards. The supporters of free-trade are mainly businesses who see business potential in the larger market that would be created by expanding free trade.

  20. 77 FR 33560 - Woodland Rail, LLC-Acquisition and Operation Exemption-Line of Maine Central Railroad Co.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-06

    ...Acquisition and Operation Exemption--Line of Maine Central Railroad Co. Woodland Rail, LLC...Calais Industrial Track (the Line) from Maine Central Railroad Co. The Line is approximately...approximately 6.75 track miles located in Maine, and approximately 5.08 track...

  1. Sea Turtle Satellite Tracking

    NSDL National Science Digital Library

    Near real-time tool for collecting, managing and sharing marine life satellite tracking data. Over 30 projects in US, Caribbean, Mediterranean, Indo-Pacific, and Australian waters. Provides links to background information for each project, the animals they are tracking, and maps that are updated regularly. Teaching resources include maps for tracking, suggestions for using data in lessons on geography, biology, earth science, math. Good introduction to satellite telemetry methodology and applications.

  2. Hurricanes 2: Tracking Hurricanes

    NSDL National Science Digital Library

    2007-12-12

    The purpose of this lesson is to examine the role of technology in identifying and tracking hurricanes. It is the second in a two-part series on the science of hurricanes and the kinds of technology being used to identify and track them. Students broaden their study by exploring how technology and science are used today to identify, measure, and track powerful tropical storms to better warn and secure people from a hurricane's often-devastating impact.

  3. Estimating Tracking Sources and Sinks

    Microsoft Academic Search

    Chris Stauffer

    2003-01-01

    When tracking in a particular environment, objects tend to appear and disappear at certain locations. These locations may correspond to doors, garages, tunnel entrances, or even the edge of a camera view. A tracking system with knowledge of these locations is capable of improved initialization of tracking sequences, reconstitution of broken tracking sequences, and determination of tracking sequence termination. Further,

  4. Railway track allocation: models and methods

    Microsoft Academic Search

    Richard M. Lusby; Jesper Larsen; Matthias Ehrgott; David Ryan

    Efficiently coordinating the movement of trains on a railway network is a central part of the planning process for a railway\\u000a company. This paper reviews models and methods that have been proposed in the literature to assist planners in finding train\\u000a routes. Since the problem of routing trains on a railway network entails allocating the track capacity of the network

  5. Interferometric tracking system for the tracking and data relay satellite

    NASA Technical Reports Server (NTRS)

    Effland, John E.; Knight, Curtis A.; Webber, John C.

    1993-01-01

    This report documents construction and testing of the Interferometric Tracking System project developed under the NASA SBIR contract NAS5-30313. Manuals describing the software and hardware, respectively entitled: 'Field Station Guide to Operations' and 'Field Station Hardware Manual' are included as part of this final report. The objective of this contract was to design, build, and operate a system of three ground stations using Very Long Baseline Interferometry techniques to measure the TDRS orbit. The ground stations receive signals from normal satellite traffic, store these signals in co-located computers, and transmit the information via phone lines to a central processing site which correlates the signals to determine relative time delays. Measurements from another satellite besides TDRS are used to determine clock offsets. A series of such measurements will ultimately be employed to derive the orbital parameters, yielding positions accurate to within 50 meters or possibly better.

  6. Interferometric tracking system for the tracking and data relay satellite

    NASA Astrophysics Data System (ADS)

    Effland, John E.; Knight, Curtis A.; Webber, John C.

    1993-05-01

    This report documents construction and testing of the Interferometric Tracking System project developed under the NASA SBIR contract NAS5-30313. Manuals describing the software and hardware, respectively entitled: 'Field Station Guide to Operations' and 'Field Station Hardware Manual' are included as part of this final report. The objective of this contract was to design, build, and operate a system of three ground stations using Very Long Baseline Interferometry techniques to measure the TDRS orbit. The ground stations receive signals from normal satellite traffic, store these signals in co-located computers, and transmit the information via phone lines to a central processing site which correlates the signals to determine relative time delays. Measurements from another satellite besides TDRS are used to determine clock offsets. A series of such measurements will ultimately be employed to derive the orbital parameters, yielding positions accurate to within 50 meters or possibly better.

  7. Explaining cloud chamber tracks

    SciTech Connect

    Broyles, A.A.

    1992-06-16

    The operation of many detection devices is usually explained in terms of the ionization tracks produced by particles despite the fact that the corresponding incident wave functions extended over the entire sensitive regions of the detectors. The mechanisms by which the wave function appears to collapse to a track is analyzed here.

  8. Large scale tracking algorithms.

    SciTech Connect

    Hansen, Ross L.; Love, Joshua Alan; Melgaard, David Kennett; Karelitz, David B.; Pitts, Todd Alan; Zollweg, Joshua David; Anderson, Dylan Z.; Nandy, Prabal; Whitlow, Gary L.; Bender, Daniel A.; Byrne, Raymond Harry

    2015-01-01

    Low signal-to-noise data processing algorithms for improved detection, tracking, discrimination and situational threat assessment are a key research challenge. As sensor technologies progress, the number of pixels will increase signi cantly. This will result in increased resolution, which could improve object discrimination, but unfortunately, will also result in a significant increase in the number of potential targets to track. Many tracking techniques, like multi-hypothesis trackers, suffer from a combinatorial explosion as the number of potential targets increase. As the resolution increases, the phenomenology applied towards detection algorithms also changes. For low resolution sensors, "blob" tracking is the norm. For higher resolution data, additional information may be employed in the detection and classfication steps. The most challenging scenarios are those where the targets cannot be fully resolved, yet must be tracked and distinguished for neighboring closely spaced objects. Tracking vehicles in an urban environment is an example of such a challenging scenario. This report evaluates several potential tracking algorithms for large-scale tracking in an urban environment.

  9. Environmental Public Health Tracking

    E-print Network

    Environmental Public Health Tracking Network VISION Version 1.0 10/20/2004 This document has been for Disease Control and Prevention ­ Department of Health and Human Services #12;Environmental Public Health the features that will be proposed to stakeholders to support environmental public health tracking nationwide

  10. 2 Tracks for Faculty

    ERIC Educational Resources Information Center

    Wilson, Robin

    2012-01-01

    The academic work force has been transformed over the past several decades, less by design than out of expediency. In 1969, professors who were either tenured or tenure-track made up 78 percent of the faculty. Those working part time made up only 18.5 percent. By 2009, those proportions had almost flipped, with tenured and tenure-track making up…

  11. TMDL TRACKING SYSTEM

    EPA Science Inventory

    Resource Purpose: The TMDL Tracking System database contains information on the waters listed under section 303(d) of the Clean Water Act and to track those listed waters through TMDL development. The purpose of the database is to allow EPA, the States/Territories/Tribes, ...

  12. Bewegingsvolgsysteem = Monitor tracking system

    Microsoft Academic Search

    Per Johan Slycke; Petrus Hermanus Veltink; Daniel Roetenberg

    2006-01-01

    A motion tracking system for tracking an object composed of object parts in a three-dimensional space. The system comprises a number of magnetic field transmitters; a number of field receivers for receiving the magnetic fields of the field transmitters; a number of inertial measurement units for recording a linear acceleration; a number of angular velocity transducers for recording angular velocities.

  13. Eye Tracking Denis Leimberg

    E-print Network

    Eye Tracking Denis Leimberg Martin Vester-Christensen LYNGBY 2005 Master Thesis IMM-Thesis-2005 discussions, and for introducing the world of eye tracking. Kaare Brandt Petersen, for sparing a day, during- viding us with excellent poker tricks. Peter Ahrendt, for loosing in Hattrick - Thank you

  14. Mobile RFID Tracking System

    Microsoft Academic Search

    A. R. Al-Ali; Fadi A. Aloul; Nada R. Aji; Amin A. Al-Zarouni; Nassar H. Fakhro

    2008-01-01

    This paper describes the design of an RFID kids tracking system. It is designed to track a moving child in a wide area, such as a park or mall, using RFID technology. The proposed system has hardware and software components. The hardware architecture consists of an RFID active tag, RFID tag reader, Web server and database server. The Web server

  15. SWTK. Software Tracking Systems

    SciTech Connect

    Laurie Harness; Laural McGilvery [SSC Laboratory, Information Services (United States)

    1994-09-27

    The Software Tracking System was used to track single user software licenses and MacRanch (Keyserver) licenses at the SSCL. Information retained on software concerned the identification and the issuee for each license. During the SSCL termination, the application will record the final distribution of the software per DOE orders.

  16. Cycle Track Lessons Learned

    E-print Network

    Bertini, Robert L.

    · Provides space exclusively for bicycles · Separated from vehicle travel lanes, parking lanes and sidewalks: Google street view Airport Way · Two-way cycle track · Long, busy road with few cross-streets #12;Cycle tires ­ less danger of getting caught in tracks · Slower speeds #12;Cargo Bikes · Require more room

  17. Tracking-Reconstruction or Reconstruction-Tracking? Comparison of Two Multiple Hypothesis Tracking Approaches to

    E-print Network

    Betke, Margrit

    Tracking-Reconstruction or Reconstruction-Tracking? Comparison of Two Multiple Hypothesis Tracking Department of Biology, Boston University Abstract We developed two methods for tracking multiple ob- jects using several camera views. The methods use the Multiple Hypothesis Tracking (MHT) framework to solve

  18. Deformable Contour Tracking & System Identification

    E-print Network

    Vaswani, Namrata

    Deformable Contour Tracking & System Identification Namrata Vaswani Dept. of Electrical & Computer video or from spatial image sequences ­ Do this offline ("smoothing") or online ("tracking") ­ O (frequent camera viewpoint changes) Partial occlusion of car by street light #12;Deformable Contour Tracking

  19. University of Central Florida Department of Communication Sciences and Disorders

    E-print Network

    Wu, Shin-Tson

    University of Central Florida Department of Communication Sciences and Disorders Ph.D. in Education Communication Sciences and Disorders Track Language and Literacy Companion to the Ph.D. in Education Handbook Dr with the College of Education, known as the Ph.D. in Education-Communication Sciences and Disorders Track

  20. A binary conflict ascending price (BICAP) mechanism for the decentralized allocation of the right to use railroad tracks

    Microsoft Academic Search

    Paul J. Brewer; Charles R. Plott

    1996-01-01

    The questions posed for study are motivated by controversies over how Sweden might change from a centralized system of railroad management to a decentralized system. The central rail administration, Banverket, will retain ownership and maintenance responsibility of the tracks, but will sell access to the tracks to private firms. The questions are about the mechanism that might accomplish this task.

  1. Satellite Tracking Threatened Species

    NSDL National Science Digital Library

    The Patuxent Wildlife Research Center and NASA's Goddard Space Flight Center have combined forces to produce this Website on the use of satellite tracking to monitor migration routes of endangered birds. Targeting the general public, the site introduces readers to satellite tracking (using Direct Readout technology), offers animations of bird flight paths (see the section entitled Birdtracks), and gives additional information on birds (in the Bird Data Archives, select a bird and watch its flight path through time). While bird information is limited to several larger species (due to the size/weight of attached transmitters), the resource serves as a useful information base for anyone wishing to learn more about satellite tracking.

  2. Progress in ATLAS central solenoid magnet

    Microsoft Academic Search

    A. Yamamoto; Y. Doi; Y. Makida; K. Tanaka; T. Haruyama; H. Yamaoka; T. Kondo; S. Mizumaki; S. Mine; K. Wada; S. Meguro; T. Sotoki; K. Kikuchi; H. ten Kate

    2000-01-01

    The ATLAS central solenoid magnet is being developed to provide a magnetic field of 2 Tesla in the central tracking volume of the ATLAS detector under construction at the CERN\\/LHC project. The solenoid coil design features high-strength aluminum stabilized superconductor to make the coil thinnest while maintaining its stability and the pure-aluminum strip technique for quench protection and safety. The

  3. Object Tracking with Self-updating Tracking Window

    Microsoft Academic Search

    Huimin Qian; Yaobin Mao; Jason Geng; Zhiquan Wang

    2007-01-01

    A basic requirement for a practical tracking system is to ad- just the tracking model in real time when the appearance of the tracked object changes. However, since the scale of the targets often varied ir- regularly, systems with fixed-size tracking window usually could not ac- commodate to these scenarios. In present paper, a new multi-scale infor- mation measure for

  4. 9. SLED TRACK. Looking east northeast from sled track terminus ...

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

    9. SLED TRACK. Looking east northeast from sled track terminus at west end of 20,000-foot track. - Edwards Air Force Base, South Base Sled Track, Edwards Air Force Base, North of Avenue B, between 100th & 140th Streets East, Lancaster, Los Angeles County, CA

  5. A Track Before Detect Algorithm for Tracking Extended Targets

    E-print Network

    Gustafsson, Fredrik

    A Track Before Detect Algorithm for Tracking Extended Targets Yvo Boers and Hans Driessen THALES to be accounted for in the processing. An extended target track before detect algorithm is presented in performance obtained by using the extended target model where a particle filter is used for the track before

  6. Keep Track with Spreadsheets.

    ERIC Educational Resources Information Center

    Sievers, Dennis

    1985-01-01

    Shows how electronic spreadsheets can be used in science classrooms for such tasks as ordering and keeping track of supplies and for organizing experiments. Sample printouts of records prepared by use of the spreadsheets are included. (JN)

  7. Tracking Polar Bears

    NSDL National Science Digital Library

    WGBH Educational Foundation

    2008-01-17

    In this interactive activity adapted from the USGS Alaska Science Center, track the movements of a polar bear as it migrates across the changing Arctic sea ice and compare the paths of four different polar bears.

  8. Tracking an underwater target

    E-print Network

    Gomez, Christina, S.B. Massachusetts Institute of Technology

    2007-01-01

    Autonomous underwater vehicles are becoming an important part in marine research. In order to help bring down the cost of running a research mission with an autonomous underwater vehicle (AUV), the method of tracking the ...

  9. Central line infections - hospitals

    MedlinePLUS

    Central line-associated bloodstream infection; CLABSI; Peripherally inserted central catheter - infection; PICC - infection; Central venous catheter - infection; CVC - infection; Central venous device - infection

  10. Towards Automatic Event Tracking

    Microsoft Academic Search

    Clive Best; Bruno Pouliquen; Ralf Steinberger; Erik Van Der Goot; Ken Blackler; Flavio Fuart; Tamara Oellinger; Camelia Ignat

    2006-01-01

    \\u000a An automatic news tracking and analysis system which records world events over long time periods is described. It allows to\\u000a track country specific news, the activities of individual persons and groups, to derive trends, and to provide data for further\\u000a analysis and research. The data source is the Europe Media Monitor (EMM) which monitors news from around the world in

  11. Cable tracking system proposal

    SciTech Connect

    Friedman, N.

    1993-06-25

    The Experimental Facilities Division requires a labeling system to identify and catalog the instrumentation, control, and computer cables that will run throughout the building. Tom Sheridan from the MIS Group has already made some general suggestions about the information that could be included in an Oracle-based Cable Tracking System (E-mail text distributed by Gary Gunderson on the 27th of August). Glenn Decker`s LS Note No. 191 is also relevant to the subject since it addresses name assignment rules for the storage ring devices. The intent of this note is to recommend a mechanism for tracking wires/cables, with enough specifics, to which all groups in the Division would adhere when pulling cables. Because most cables will run between various beamline devices, hutch safety components, and equipment racks, any method of tracking cables is related to the Equipment Tracking System. That system has been developed by the APS Project personnel and is described in the APS Project Equipment Tracking System Guidelines (DRAFT). It can be adopted to XFD`s needs. Two essential features of the Cable Tracking System are: 1) Each cable shell have a unique Identifier, and 2) Cable label must contain information that is helpful during troubleshooting in the field. The Identifier is an alphanumeric string of characters that will originate in the Oraclebased Cable Tracking System. It is not necessary for the identifier to carry a lot of intelligence its primary purpose is simply to provide a link to the database. Bar-coding the Identifier would make it easy to combine cable information with the Equipment Tracking System.

  12. Local track repair for video tracking on small UAVs

    NASA Astrophysics Data System (ADS)

    DelMarco, Stephen; Antone, Matthew; Reiter, Austin; Jenkins, Todd

    2007-10-01

    Persistent aerial video surveillance from small UAV (SUAV) platforms requires accurate and robust target tracking capabilities. However, video tracks can break due to excessive camera motion, target resolution, low signal-to noise ratio, video frame dropout, and frame-to-frame registration errors. Connecting broken tracks (video track repair) is thus essential for maintaining high quality target tracks. In this paper we present an approach to track repair based on multi-hypothesis sequential probability ratio tests (MHSPRT) that is suitable for real-time video tracking applications. To reduce computational complexity, the approach uses a target dynamics model whose state estimation covariance matrix has an analytic eigendecomposition. Chi-square gating is used to form feasible track-to-track associations, and a set of local hypothesis tests is defined for associating new tracks with coasted tracks. Evidence is accumulated across video frames by propagating posterior probabilities associated with each track repair hypothesis in the MHSPRT framework. Global maximum likelihood and maximum a posteriori estimation techniques resolve conflicts between local track association hypotheses. The approach also supports fusion of appearance-based features to augment statistical distributions of the track state and enhance performance during periods of kinematic ambiguity. First, an overview of the video tracker technology is presented. Next the track repair algorithm is described. Finally, numerical results are reported demonstrating performance on real video data acquired from an SUAV.

  13. ATE Central

    NSDL National Science Digital Library

    ATE Central is a freely available online portal and collection of materials and services that highlight the work of the Advanced Technological Education (ATE) projects and centers. These National Science Foundation funded initiatives work with educators from two-year colleges to develop and implement ideas for improving the skills of technicians and the educators who teach them. ATE Central is designed to help educators, students, and the general public to learn about, and use materials from, the entire depth and breadth of the Advanced Technological Education program.ATE Central helps direct users to a full range of high-impact ATE resources available online, including curricula, learning objects, and podcasts. The portal aggregates information about the materials developed by ATE centers and projects, and organizes them using subject taxonomies, context appropriate keywords, and other digital cataloging techniques.

  14. 7. 'Tunnel No 14, Concrete Lining,' Southern Pacific Standard SingleTrack ...

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

    7. 'Tunnel No 14, Concrete Lining,' Southern Pacific Standard Single-Track Tunnel, ca. 1909. Under current numbering, this is now Tunnel 29 (HAER No. CA-205). - Central Pacific Transcontinental Railroad, Sacramento to Nevada state line, Sacramento, Sacramento County, CA

  15. Engineering Central

    NSDL National Science Digital Library

    The Engineering Central website provides a plethora of listings of employment resources for engineers. The website allows users to submit their resume to a resume bank, browse through entry-level jobs, as well as post jobs online. Several links that point to other engineering resources are also provided.

  16. Central Chile

    NASA Technical Reports Server (NTRS)

    2002-01-01

    The beginning of spring in central Chile looked like this to SeaWiFS. The snow-covered Andes mark the country's eastern border, and phytoplankton blooms and river sediment plumes fill the waters off its west coast. A large eddy due west of Concepcion is highlighted by the phytoplankton it contains.

  17. @central park

    NSDL National Science Digital Library

    The Central Park Conservancy, a not-for-profit organization dedicated to restoring, improving, and managing Central Park's grounds and facilities, offers this "official" site, which contains a wealth of information about what is arguably the world's most famous city park. Each of the site's sections contains useful or interesting information; the Then & Now section, for instance, offers an overview of Central Park's history, a bibliography with 43 entries for those seeking further information, and a list of movies with scenes set in the park. Another highlight of the site is the Virtual Park, which consists of a set of clickable maps through which users can explore 72 points of interest, each described in the affectionate style of a travel guidebook. The site's other sections include such features as events schedules, press releases, information on when and where particular varieties of flowers bloom, and a section devoted entirely to activities for families and children. This site will be especially useful to those who are planning a visit to Central Park, but other users will likely find it informative and entertaining as well.

  18. Content-aware H.264 encoding for traffic video tracking applications

    Microsoft Academic Search

    Eren Soyak; Sotirios A. Tsaftaris; Aggelos K. Katsaggelos

    2010-01-01

    The compression of video can reduce the accuracy of tracking algorithms, which is problematic for centralized applications that rely on remotely captured and compressed video for input. We show the effects of high compression on the features commonly used in real-time video object tracking. We propose a computationally efficient Region of Interest (ROI) extraction method, which is used during standard-compliant

  19. A New Approach to Maneuvring Target Tracking in Passive Multisensor Environment

    E-print Network

    Paris-Sud XI, Université de

    A New Approach to Maneuvring Target Tracking in Passive Multisensor Environment Ammar Cherchar approach to the mul- tisensor Bearing-Only Tracking applications (BOT). Usually, a centralized data fusion at the fusion center. Alternatively, since the Cartesian target positions can be determined by fusing at least 2

  20. A Backmapping Approach for Graph-Based Object Tracking

    Microsoft Academic Search

    Thiago Meireles Paixão; Ana Beatriz V. Graciano; Roberto Marcondes Cesar Junior; Roberto Hirata Jr.

    2008-01-01

    Model-based methods play a central role to solve different problems in computer vision. A particular important class of such methods rely on graph models where an object is decomposed into a number of parts, each one being represented by a graph vertex. A graph model-based tracking algorithm has been recently introduced in which a model is generated for a given

  1. Predictive Tracking over Occlusions by 4-Month-Old Infants

    ERIC Educational Resources Information Center

    von Hofsten, Claes; Kochukhova, Olga; Rosander, Kerstin

    2007-01-01

    Two experiments investigated how 16-20-week-old infants visually tracked an object that oscillated on a horizontal trajectory with a centrally placed occluder. To determine the principles underlying infants' tendency to shift gaze to the exiting side before the object arrives, occluder width, oscillation frequency, and motion amplitude were…

  2. EXAMINING AN ALTERNATIVE APPROACH TO HIRING TENURE TRACK FACULTY

    Microsoft Academic Search

    Daniel W. Wakelee; William P. Cordeiro

    Hiring tenure track faculty is one of the most important decisions in higher education. Hiring outcomes shape faculty careers, the process is costly and time consuming and, ultimately, hiring significantly impacts the character of academic departments and institutions. Despite its central importance, hiring is often driven by past practices with little regard for empirical data concerning \\

  3. Application of DHT-Inspired Routing for Object Tracking

    Microsoft Academic Search

    Pengfei Di; M. Yaser Houri; Qing Wei; J. Widmer; T. Fuhrmann

    2007-01-01

    A major problem in tracking objects in sensor networks is trading off update traffic and timeliness of the data that is available to a monitoring site. Typically, either all objects regularly update some central registry with their location information, or the monitoring instance floods the network with a request when it needs information for a particular object. More sophisticated approaches

  4. Distributed fusion architectures and algorithms for target tracking

    Microsoft Academic Search

    MARTIN E. LIGGINS II; Chee-Yee Chong; IVAN KADAR; MARK G. ALFORD; VINCENT VANNICOLA; STELIOS THOMOPOULOS

    1997-01-01

    Modern surveillance systems often utilize multiple physically distributed sensors of different types to provide complementary and overlapping coverage on targets. In order to generate target tracks and estimates, the sensor data need to be fused. While a centralized processing approach is theoretically optimal, there are significant advantages in distributing the fusion operations over multiple processing nodes. This paper discusses architectures

  5. Laser-Based Pedestrian Tracking in Outdoor Environments by Multiple Mobile Robots

    PubMed Central

    Ozaki, Masataka; Kakimuma, Kei; Hashimoto, Masafumi; Takahashi, Kazuhiko

    2012-01-01

    This paper presents an outdoors laser-based pedestrian tracking system using a group of mobile robots located near each other. Each robot detects pedestrians from its own laser scan image using an occupancy-grid-based method, and the robot tracks the detected pedestrians via Kalman filtering and global-nearest-neighbor (GNN)-based data association. The tracking data is broadcast to multiple robots through intercommunication and is combined using the covariance intersection (CI) method. For pedestrian tracking, each robot identifies its own posture using real-time-kinematic GPS (RTK-GPS) and laser scan matching. Using our cooperative tracking method, all the robots share the tracking data with each other; hence, individual robots can always recognize pedestrians that are invisible to any other robot. The simulation and experimental results show that cooperating tracking provides the tracking performance better than conventional individual tracking does. Our tracking system functions in a decentralized manner without any central server, and therefore, this provides a degree of scalability and robustness that cannot be achieved by conventional centralized architectures. PMID:23202171

  6. Laser-based pedestrian tracking in outdoor environments by multiple mobile robots.

    PubMed

    Ozaki, Masataka; Kakimuma, Kei; Hashimoto, Masafumi; Takahashi, Kazuhiko

    2012-01-01

    This paper presents an outdoors laser-based pedestrian tracking system using a group of mobile robots located near each other. Each robot detects pedestrians from its own laser scan image using an occupancy-grid-based method, and the robot tracks the detected pedestrians via Kalman filtering and global-nearest-neighbor (GNN)-based data association. The tracking data is broadcast to multiple robots through intercommunication and is combined using the covariance intersection (CI) method. For pedestrian tracking, each robot identifies its own posture using real-time-kinematic GPS (RTK-GPS) and laser scan matching. Using our cooperative tracking method, all the robots share the tracking data with each other; hence, individual robots can always recognize pedestrians that are invisible to any other robot. The simulation and experimental results show that cooperating tracking provides the tracking performance better than conventional individual tracking does. Our tracking system functions in a decentralized manner without any central server, and therefore, this provides a degree of scalability and robustness that cannot be achieved by conventional centralized architectures. PMID:23202171

  7. Central Africa

    NSDL National Science Digital Library

    Begun in 1996, the International Crisis Group's (ICG) Central Africa Project analyzes political and ethnic conflict within and between the nations that straddle mid-Africa, including the Democratic Republic of Congo (DRC), Burundi, Angola, Uganda, and Rwanda. As part of that effort ICG has released over twelve full text reports in the last year (a few in French only). The two most recent in-depth reports are: "Africa's Seven-Nation War," which examines how the armies of seven African nations have been drawn into the rebellion against DRC President Laurent Dsir Kabila; and "How Kabila Lost His Way," which traces the foundation of the Kabila regime and seeks to discover why it has engendered both internal and external opposition. Well-researched and fully footnoted, yet written with a non-specialist audience in mind, these reports are a good resource for both students and general readers with an interest in the current situation in Central Africa.

  8. PE Central

    NSDL National Science Digital Library

    The Virginia Polytechnic Institute Health and Physical Education Program developed this site, a clearinghouse of information about K-12 physical education and health. An extensive list of lesson plans and assessment ideas, arranged topically and by grade level, is the focal point of this site; the Classroom Teacher Lesson Ideas uses PE "across the curriculum" to help students learn concepts in other subjects. PE Central provides information for PE professionals on relevant journals, job announcements, and equipment purchases, among other topics.

  9. IPO Central

    NSDL National Science Digital Library

    IPO (Initial Public Offerings) Central, provided by The Reference Press, contains a wealth of information on IPOs. It features a complete list of companies that "filed for an initial public offering of common stock on or after May 6, 1996, the first day that all US companies were required to file electronically," along with EDGAR Online SEC filings. This directory can be accessed alphabetically or by date, and the latest filings are available under a separate menu item. IPO Central also highlights one featured IPO per week, with a free link to a Hoover Online profile on that company. "The Insider" offers short analytical columns on IPOs, and the "Beginner's Guide" has links to basic IPO information to help the novice. The site also offers links to other IPO-related sites. IPO Central does not at this time offer a searchable interface to its directory, but the providers promise improved search features soon. Note that listings are removed from the directory after six months and that EDGAR Online is in no way related to SEC (Securities and Exchange Commission) EDGAR.

  10. A Fast Track Trigger for the H1 Collaboration

    NASA Astrophysics Data System (ADS)

    Baird, A.; Schultz-Coulon, H. C.; Elsen, E.; Fleming, Y. H.; Grab, C.; Naumann, J.; Newman, P. R.; Niebuhr, C.; Sankey, D.; Schöning, A.; Wissing, C.

    2001-04-01

    The electron-proton collider HERA will be upgraded to provide higher luminosity in the year 2001. In order to enhance the physics output especially for exclusive channels, such as open heavy quark production, a low pt Fast Track Trigger (FTT) with high resolution is built for the H1 Collaboration which reconstructs precisely all tracks measured in the central drift chamber in three-dimensions within 25 ?s. Curved tracks are reconstructed down to 100 MeV in a high track multiplicity environment with a momentum resolution of better than 5%. This complex and demanding task is tackled by a highly parallel track reconstruction algorithm. The first step identifies short track segments locally with a template matching technique using FPGAs. Segment linking using the content addressable memory (CAM) functionality of the Altera APEX 20K600E and track parameter optimisation using DSPs proceed in the second step within 20 ?s. Finally, the derived physics quantities such as invariant masses are computed within some hundred ?s using conventional processor boards. The full design is flexible and scalable with the capability to add information from other subtrigger systems.

  11. Cooperative Modeling and Design History Tracking Using Design Tracking Matrix

    E-print Network

    Kim, Jonghyun

    2010-10-12

    COOPERATIVE MODELING AND DESIGN HISTORY TRACKING USING DESIGN TRACKING MATRIX A Thesis by JONGHYUN KIM Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 2009 Major Subject: Industrial Engineering COOPERATIVE MODELING AND DESIGN HISTORY TRACKING USING DESIGN TRACKING MATRIX A Thesis by JONGHYUN KIM Submitted to the Office of Graduate Studies...

  12. 31. "FIGURE 310, TRACK LAYOUT (EDWARDS)". Test track footing and ...

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

    31. "FIGURE 3-10, TRACK LAYOUT (EDWARDS)". Test track footing and rail head cross sections. - Edwards Air Force Base, South Base Sled Track, Edwards Air Force Base, North of Avenue B, between 100th & 140th Streets East, Lancaster, Los Angeles County, CA

  13. Sun tracking device

    Microsoft Academic Search

    Yekutieli

    1979-01-01

    A sensor is disclosed for detecting the position of the sun in the sky and for use in systems adapted to track the movement of the sun in the sky, said sensor comprising a housing provided with a predetermined opening in the vertical and in the horizontal directions, a member having a reflecting surface at least part of which is

  14. Solar tracking system

    Microsoft Academic Search

    Chromie

    1978-01-01

    A solar powered engine and tracking system comprises a piston working within a cylinder for turning a drive shaft for driving an electrical generator or performing other useful work, and a solar concentrator comprising a plurality of mirrors, each reflecting Sun light on a common focal point on the end of the cylinder for heating a flash boiler located thereon.

  15. Solar tracking device

    Microsoft Academic Search

    Volna

    1980-01-01

    Apparatus for directing a pointing axis at the position of the sun, and for tracking the relative motion of the sun from an observation point on earth from horizon to horizon with a single, constant speed driving mechanism. The apparatus comprises a first member aligned along the local vertical axis, a second member aligned along an intersecting polar axis, a

  16. GPS Tracks Ground Deformation

    USGS Multimedia Gallery

    USGS Field Engineer Ben Pauk records site and equipment information for the Global Positioning System (GPS) installed at the North Rim station in the Newberry National Volcanic Monument. The GPS records the precise position of the station, including latitude, longitude and elevation. Tracking subtle...

  17. Spiral track oven

    SciTech Connect

    Drobilisch, Sandor

    1998-12-20

    Final report on development of a continuously operating oven system in which the parts are progressing automatically on a spiral track for in-line service installation for the production of electronic and/or other components to be heat cured or dried.

  18. RESEARCH TRACKING SYSTEM

    EPA Science Inventory

    Resource Purpose: The Research Tracking System provides information on the status of research that is being conducted to support new drinking water standards. Presently, the database contains only M-DBP research. It will be expanded to include research on the contaminant ca...

  19. Multi camera image tracking

    Microsoft Academic Search

    James Black; Tim Ellis

    2006-01-01

    This paper presents a method for multi-camera image tracking in the context of image surveillance. The approach differs from most methods in that we exploit multiple camera views to resolve object occlusion. Moving objects are detected by using background subtraction. Viewpoint correspondence between the detected objects is then established by using the ground plane homography constraint. The Kalman Filter is

  20. Foinaven fast track flowlines

    SciTech Connect

    Taylor, L.H.; Mair, J.

    1996-12-31

    The decision by British Petroleum to develop offshore fields west of the Shetlands in water depths exceeding 500 meters within three and a half years of discovery posed a unique submarine pipeline installation challenge. This paper summarizes the salient features of a fast track program to install a diverless subsea pipeline system using rigid reeled pipe technology in an offshore frontier area.

  1. Chemical cloud tracking systems

    Microsoft Academic Search

    Larry B. Grim; Thomas C. Gruber; Martin Marshall; Brad Rowland

    2002-01-01

    This paper describes the Chemical Cloud Tracking System (CCTS) which has been installed at Dugway Proving Ground. The CCTS allows mapping of chemical clouds in real time from a safe standoff distance. The instruments used are passive standoff chemical agent detectors (FTIRs). Each instrument individually can only measure the total of all the chemical in its line-of-site; the distance to

  2. Tracking Weather Satellites.

    ERIC Educational Resources Information Center

    Martin, Helen E.

    1996-01-01

    Describes the use of weather satellites in providing an exciting, cohesive framework for students learning Earth and space science and in providing a hands-on approach to technology in the classroom. Discusses the history of weather satellites and classroom satellite tracking. (JRH)

  3. Differential EMD Tracking

    Microsoft Academic Search

    Qi Zhao; Shane Brennan; Hai Tao

    2007-01-01

    Illumination changes cause object appearance to change drastically and many existing tracking algorithms lack the capability to handle this problem. The Earth Mover's Dis- tance (EMD) is a similarity measure that is more robust against illumination changes. However, EMD is computa- tionally expensive and we therefore propose the Differen- tial EMD (DEMD) algorithm which computes the deriva- tive of the

  4. Projection approximation subspace tracking

    Microsoft Academic Search

    Bin Yang

    1995-01-01

    Subspace estimation plays an important role in a variety of modern signal processing applications. We present a new approach for tracking the signal subspace recursively. It is based on a novel interpretation of the signal subspace as the solution of a projection like unconstrained minimization problem. We show that recursive least squares techniques can be applied to solve this problem

  5. Static compressive tracking.

    PubMed

    Townsend, D J; Poon, P K; Wehrwein, S; Osman, T; Mariano, A V; Vera, E M; Stenner, M D; Gehm, M E

    2012-09-10

    This paper presents the Static Computational Optical Undersampled Tracker (SCOUT), an architecture for compressive motion tracking systems. The architecture uses compressive sensing techniques to track moving targets at significantly higher resolution than the detector array, allowing for low cost, low weight design and a significant reduction in data storage and bandwidth requirements. Using two amplitude masks and a standard focal plane array, the system captures many projections simultaneously, avoiding the need for time-sequential measurements of a single scene. Scenes with few moving targets on static backgrounds have frame differences that can be reconstructed using sparse signal reconstruction techniques in order to track moving targets. Simulations demonstrate theoretical performance and help to inform the choice of design parameters. We use the coherence parameter of the system matrix as an efficient predictor of reconstruction error to avoid performing computationally intensive reconstructions over the entire design space. An experimental SCOUT system demonstrates excellent reconstruction performance with 16X compression tracking movers on scenes with zero and nonzero backgrounds. PMID:23037240

  6. People Tracking: Data Association

    E-print Network

    Ramanan, Deva

    People Tracking: Data Association Deva Ramanan Toyota Technological Institute at Chicago #12;What's data association? "Bare-bones" Kalman filter: acts like a smoother Simple strategy: gate window around motion priors and/or background models Is data association solved? Probably not #12;What about other 5

  7. Tracking Through the Tulips

    NSDL National Science Digital Library

    Dorothy Davis

    2005-04-01

    "Tiptoe Through the Tulips" was the theme song for kindergarten through second-grade students at Ashland City Primary in Ashland, Tennessee who participated in Journey North, a free, online educational program that enables sudents to track the blooming of tulips across the country as spring comes to North America.

  8. TRACKING Trounces Test Scores

    ERIC Educational Resources Information Center

    Education Digest: Essential Readings Condensed for Quick Review, 2004

    2004-01-01

    This article presents an adaptation of an article from School Board News, January 6, 2004 edition. The article describes the effort of de-tracking students of varying ability levels, made by officials of South Side High School, in Rockville Centre, New York, and Noble High School, in North Berwick, Maine. Officials from both schools say that the…

  9. Dust Devil Tracks

    NASA Technical Reports Server (NTRS)

    2005-01-01

    [figure removed for brevity, see original site] Context image for PIA03052 Dust Devil Tracks

    These dust devil tracks are located in the region surrounding Hooke Crater.

    Image information: VIS instrument. Latitude 46.6S, Longitude 316.1E. 17 meter/pixel resolution.

    Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.

    NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

  10. Tracking Self into Place

    ERIC Educational Resources Information Center

    Piersol, Laura

    2010-01-01

    In an effort to figure out what it means to educate "ecologically," I decided to track down some of the stories that I was living, telling and making as an educator. I ended up lost in the house of environmental education, stuck within the rooms of ecological science and political advocacy. Outside on the lawn sat the story of place based…

  11. NORAD satellite tracking

    Microsoft Academic Search

    Joseph J. F. Liu

    1987-01-01

    NORAD routinely tracks about 6000 orbiting objects. During the last 30 days of orbital time, prior to reentry, special perturbations are used in the orbital update procedure. Besides routine orbit determination, NORAD does special tasks such as predicting satellite orbit conjunctions within 20 km, ephimerides of weather satellites, satellite decay predictions and other studies. Since their mission is operational, they

  12. Tracking with scintillating fibers

    NASA Astrophysics Data System (ADS)

    Ruchti, R.

    1995-11-01

    The parametric performance of scintillating fiber tracking elements is reviewed and compared with recent measurements. Topics include performance of scintillation materials, single-clad and multiclad fiber waveguide structures, optical splicing, and photosensors. A brief description of fiber trackers utilized in several experiments is provided, and an extended bibliography is included for detailed reference.

  13. Homography-based Tracking for Central Catadioptric Cameras

    E-print Network

    Mei, Christopher

    catadioptric cam- eras (including perspective cameras). We extend the standard notion of homography]. Catadioptric cam- eras are the omnidirectional vision systems that combine a single mirror and a camera. Baker of points on the sphere. It has since been used extensively to develop generic algorithms. Recently a lot

  14. Displacement thresholds in central and peripheral vision during tracking

    NASA Technical Reports Server (NTRS)

    Haines, R. F.

    1986-01-01

    The effects of stimulus duration and angular velocity on a subject's judgment of displacement threshold are examined. Twenty-six male subjects between 17-45 years with uncorrected 20:20 distance acuity and normal color perception and stereopsis studied a series of forced choice, paired comparison trials in which a long, thin, collimated horizontally oriented line moved downward through 12 angles ranging from 0.6-60 arcmin and judged which stimulus moved in each pair. The displacements were produced by 0.25, 0.5, 1, 2, and 4 sec stimulus duration and 2.5, 5, 10, and 15 deg/sec angular rates. Stimulus velocity, stimulus duration, mean threshold displacement, and mean confidence results are analyzed. It is observed that displacement judgment accuracy is increased with increasing stimulus duration. The data are compared with the results of Johnson and Leibowitz (1976) and Johnson and Scobey (1982), and good correlation with the Johnson and Leibowitz data is detected. The data reveal that threshold is based on a constant stimulus velocity over this range of durations and velocities. The data are applicable to the study of the final approach to landing of medium and large commercial jet aircraft.

  15. The central track trigger of the DO experiment

    E-print Network

    Wilson, Graham Wallace; Yip, K.; Xu, Q.; Olsen, J.; Wilcer, N.; Wijnen, T.; Vachon, B.; Tomoto, M.; Stevenson, K.; Rapisarda, S.; Ramirez-Gomez, R.

    2004-10-01

    The general purpose DO collider detector, located at Fermi National Accelerator Laboratory, is operated in the high luminosity (L = 2 X 10(32) cm(-2) s(-1)) and high-collision-rate environment (396 ns between beam crossings) of the upgraded Tevatron...

  16. Fast Track Dredged Material Decontamination

    E-print Network

    Brookhaven National Laboratory

    Fast Track Dredged Material Decontamination Demonstration for the Port of New York and New Jersey Department of Energy Brookhaven National Laboratory Fast Track Dredged Material Decontamination Demonstration .................................................................................................................................. 2 3. WRDA Decontamination Program Overview

  17. Space Telescope moving target tracking

    NASA Technical Reports Server (NTRS)

    Strikwerda, T. E.; Strohbehn, K.; Fowler, K. R.; Skillman, D. R.

    1985-01-01

    This paper formulates a Space Telescope (ST) moving target tracking algorithm and evaluates a practical implementation. The algorithm is shown to be satisfactory for tracking such moving objects as the moons of Mars.

  18. Perceptual style and tracking performance

    NASA Technical Reports Server (NTRS)

    Atchley, Paul

    1991-01-01

    The relationship between perceptual style and tracking of a target was examined. Four pilots were given the Embedded Figures Test to assess their degrees of field dependence or independence. Then they flew in a helicopter simulator and attempted to track an airborne target. A high negative correlation was found between perceptual style and tracking performance. Field-independent subjects were able to track the target for longer periods than field-dependent subjects.

  19. Identifying and Preserving Wildlife Tracks

    NSDL National Science Digital Library

    This site is an article by Jon C. Boren, Extension Wildlife Specialist and Byron D. Wright, Agricultural Specialist both from the University of New Mexico entitled Identifying and Preserving Wildlife Tracks. It contains information about identifying animal tracks, including those of deer, elk, antelope, and mountain lions. Also, there is a helpful guide to preserving animal tracks by making track casts, including the procedure and materials needed. A recommended reading list is also presented to give visitors a starting point for more information.

  20. Neuropsychology Central

    NSDL National Science Digital Library

    Browndyke, J. N.

    1997-01-01

    Neuropsychology Central is devoted to the subject of - "Neuropsychology, a new branch of science with the specific and unique aim of investigating the role of individual brain systems in complex forms of mental activity." - A.R. Luria "The Working Brain" The page aims to describe the importance of neuropsychology as a science of brain and behavior, and to act as a resource for the professional and layperson alike. See links to current technology for brain imaging, and sections covering different aspects of this ever growing field such as cognitive, developmental, and geriatric Neuropsychology. In addition, a reader survey is included to facilitate the expansion of the site.

  1. Deep inelastic inclusive and diffractive scattering at Q values from 25 to 320 GeV 2 with the ZEUS forward plug calorimeter

    NASA Astrophysics Data System (ADS)

    Chekanov, S.; Derrick, M.; Magill, S.; Musgrave, B.; Nicholass, D.; Repond, J.; Yoshida, R.; Mattingly, M. C. K.; Jechow, M.; Pavel, N.; Antonioli, P.; Bari, G.; Bellagamba, L.; Boscherini, D.; Bruni, A.; Bruni, G.; Cindolo, F.; Corradi, M.; Iacobucci, G.; Margotti, A.; Nania, R.; Polini, A.; Antonelli, S.; Basile, M.; Bindi, M.; Cifarelli, L.; Contin, A.; De Pasquale, S.; Sartorelli, G.; Zichichi, A.; Bartsch, D.; Brock, I.; Hartmann, H.; Hilger, E.; Jakob, H.-P.; Jüngst, M.; Nuncio-Quiroz, A. E.; Paul, E.; Renner, R.; Samson, U.; Schönberg, V.; Shehzadi, R.; Wlasenko, M.; Brook, N. H.; Heath, G. P.; Morris, J. D.; Capua, M.; Fazio, S.; Mastroberardino, A.; Schioppa, M.; Susinno, G.; Tassi, E.; Kim, J. Y.; Ibrahim, Z. A.; Kamaluddin, B.; Wan Abdullah, W. A. T.; Ning, Y.; Ren, Z.; Sciulli, F.; Chwastowski, J.; Eskreys, A.; Figiel, J.; Galas, A.; Gil, M.; Olkiewicz, K.; Stopa, P.; Zawiejski, L.; Adamczyk, L.; Bo?d, T.; Grabowska-Bo?d, I.; Kisielewska, D.; ?ukasik, J.; Przybycie?, M.; Suszycki, L.; Kota?ski, A.; S?omi?ski, W.; Behrens, U.; Blohm, C.; Bonato, A.; Borras, K.; Ciesielski, R.; Coppola, N.; Drugakov, V.; Fang, S.; Fourletova, J.; Geiser, A.; Göttlicher, P.; Grebenyuk, J.; Gregor, I.; Haas, T.; Hain, W.; Hüttmann, A.; Kahle, B.; Kasemann, M.; Katkov, I. I.; Klein, U.; Kötz, U.; Kowalski, H.; Lim, H.; Lobodzinska, E.; Löhr, B.; Mankel, R.; Melzer-Pellmann, I.-A.; Miglioranzi, S.; Montanari, A.; Namsoo, T.; Notz, D.; Parenti, A.; Rinaldi, L.; Roloff, P.; Rubinsky, I.; Santamarta, R.; Schneekloth, U.; Spiridonov, A.; Szuba, D.; Szuba, J.; Theedt, T.; Wolf, G.; Wrona, K.; Yagües Molina, A. G.; Youngman, C.; Zeuner, W.; Lohmann, W.; Schlenstedt, S.; Barbagli, G.; Gallo, E.; Pelfer, P. G.; Bamberger, A.; Dobur, D.; Karstens, F.; Vlasov, N. N.; Bussey, P. J.; Doyle, A. T.; Dunne, W.; Forrest, M.; Rosin, M.; Saxon, D. H.; Skillicorn, I. O.; Gialas, I.; Papageorgiu, K.; Holm, U.; Klanner, R.; Lohrmann, E.; Schleper, P.; Schörner-Sadenius, T.; Sztuk, J.; Stadie, H.; Turcato, M.; Foudas, C.; Fry, C.; Long, K. R.; Tapper, A. D.; Matsumoto, T.; Nagano, K.; Tokushuku, K.; Yamada, S.; Yamazaki, Y.; Barakbaev, A. N.; Boos, E. G.; Pokrovskiy, N. S.; Zhautykov, B. O.; Aushev, V.; Borodin, M.; Kozulia, A.; Lisovyi, M.; Son, D.; de Favereau, J.; Piotrzkowski, K.; Barreiro, F.; Glasman, C.; Jimenez, M.; Labarga, L.; del Peso, J.; Ron, E.; Soares, M.; Terrón, J.; Zambrana, M.; Corriveau, F.; Liu, C.; Schwartz, J.; Walsh, R.; Zhou, C.; Tsurugai, T.; Antonov, A.; Dolgoshein, B. A.; Gladkov, D.; Sosnovtsev, V.; Stifutkin, A.; Suchkov, S.; Dementiev, R. K.; Ermolov, P. F.; Gladilin, L. K.; Golubkov, Yu. A.; Khein, L. A.; Korzhavina, I. A.; Kuzmin, V. A.; Levchenko, B. B.; Lukina, O. Yu.; Proskuryakov, A. S.; Shcheglova, L. M.; Zotkin, D. S.; Abt, I.; Büttner, C.; Caldwell, A.; Kollar, D.; Reisert, B.; Schmidke, W. B.; Sutiak, J.; Grigorescu, G.; Keramidas, A.; Koffeman, E.; Kooijman, P.; Pellegrino, A.; Tiecke, H.; Vázquez, M.; Wiggers, L.; Brümmer, N.; Bylsma, B.; Durkin, L. S.; Lee, A.; Ling, T. Y.; Allfrey, P. D.; Bell, M. A.; Cooper-Sarkar, A. M.; Devenish, R. C. E.; Ferrando, J.; Foster, B.; Korcsak-Gorzo, K.; Oliver, K.; Patel, S.; Roberfroid, V.; Robertson, A.; Straub, P. B.; Uribe-Estrada, C.; Walczak, R.; Bertolin, A.; Dal Corso, F.; Dusini, S.; Longhin, A.; Stanco, L.; Bellan, P.; Brugnera, R.; Carlin, R.; Garfagnini, A.; Limentani, S.; Oh, B. Y.; Raval, A.; Ukleja, J.; Whitmore, J. J.; Iga, Y.; D'Agostini, G.; Marini, G.; Nigro, A.; Cole, J. E.; Hart, J. C.; Gabareen, A.; Ingbir, R.; Kananov, S.; Smith, O.; Stern, A.; Kuze, M.; Maeda, J.; Hori, R.; Kagawa, S.; Okazaki, N.; Shimizu, S.; Tawara, T.; Hamatsu, R.; Kaji, H.; Kitamura, S.; Ota, O.; Ri, Y. D.; Costa, M.; Ferrero, M. I.; Monaco, V.; Sacchi, R.; Solano, A.; Arneodo, M.; Ruspa, M.; Fourletov, S.; Martin, J. F.; Stewart, T. P.; Boutle, S. K.; Butterworth, J. M.; Gwenlan, C.; Jones, T. W.; Loizides, J. H.; Wing, M.; Brzozowska, B.; Ciborowski, J.; Grzelak, G.; Kulinski, P.; ?u?niak, P.; Malka, J.; Nowak, R. J.; Pawlak, J. M.; Tymieniecka, T.; Ukleja, A.; ?arnecki, A. F.; Adamus, M.; Plucinski, P.; Eisenberg, Y.; Hochman, D.; Karshon, U.; Brownson, E.; Danielson, T.; Everett, A.; Kçira, D.; Reeder, D. D.; Ryan, P.; Savin, A. A.; Smith, W. H.; Wolfe, H.; Bhadra, S.; Catterall, C. D.; Cui, Y.; Hartner, G.; Menary, S.; Noor, U.; Standage, J.; Whyte, J.; ZEUS Collaboration

    Deep inelastic scattering and its diffractive component, ep?e?p?eXN, have been studied at HERA with the ZEUS detector using an integrated luminosity of 52.4 pb -1. The M method has been used to extract the diffractive contribution. A wide range in the centre-of-mass energy W (37-245 GeV), photon virtuality Q (20-450 GeV 2) and mass M (0.28-35 GeV) is covered. The diffractive cross section for 2

  2. Tracking Performance of the ATLAS Inner Detector and Observation of Known Hadrons

    E-print Network

    Kayl, Manuel

    2010-01-01

    The inner detector is the central tracking device of the ATLAS detector. In these proceedings the tracking performance of the inner detector is presented on collision data recorded at $\\sqrt{s}$ = 900 GeV and 7 TeV. The identification of resonances like $\\Xi$ and $\\Omega$ baryons in cascade decays via $K_{\\mathrm{s}}$ and $\\Lambda$ mesons is presented as well as the reconstruction of the $J / \\psi $ and $\\psi$(2S) mesons decaying into two muons. Furthermore, the performance of the track reconstruction and a data-driven method of estimating the track reconstruction efficiency as used in measurements of charged particle densities are discussed.

  3. LAYERED GRAPHICAL MODELS FOR TRACKING

    E-print Network

    ABSTRACT Tracking multiple targets using fixed cameras with non­overlapping views is a challenging problem# # # # LAYERED GRAPHICAL MODELS FOR TRACKING PARTIALLY­OCCLUDED MOVING OBJECTS IN VIDEO VITALY GRAPHICAL MODELS FOR TRACKING PARTIALLY­OCCLUDED MOVING OBJECTS IN VIDEO by VITALY ABLAVSKY B.A., Brandeis

  4. LAYERED GRAPHICAL MODELS FOR TRACKING

    E-print Network

    Science ABSTRACT Tracking multiple targets using fixed cameras with non-overlapping views is a challenging' & $ % LAYERED GRAPHICAL MODELS FOR TRACKING PARTIALLY-OCCLUDED MOVING OBJECTS IN VIDEO VITALY GRAPHICAL MODELS FOR TRACKING PARTIALLY-OCCLUDED MOVING OBJECTS IN VIDEO by VITALY ABLAVSKY B.A., Brandeis

  5. Satellite (IRLS) tracking of elk

    NASA Technical Reports Server (NTRS)

    Buechner, H. K.

    1972-01-01

    The practicability of tracking free roaming animals in natural environments by satellite systems is reported. Satellite systems combine continuous tracking with simultaneous monitoring of physiological and environmental parameters through a combination of radio tracking and biotelemetric ground systems that lead to a better understanding of animal behavior and migration patterns.

  6. Appearance Modeling for Visual Tracking

    Microsoft Academic Search

    Shaohua Kevin Zhou; Rama Chellappa; Zhanfeng Yue

    Visual tracking needs modeling inter-frame motion and appearance changes. In conventional visual tracking algorithms, the appearance model is either fixed or rapidly changing, and the motion model is simply a random walk with fixed noise variance. Also, if particle filter is used for solving tracking problem, the the number of particles is typically fixed. All these factors make the visual

  7. Likelihood Ratio Detection and Tracking

    Microsoft Academic Search

    Lawrence Stone

    2009-01-01

    Likelihood Ratio Detection and Tracking (LRDT) is an extension of Bayesian tracking that simultaneously estimates whether a target is present and its state if present. It is particularly suited to difficult detection and tracking situations involving low signal-to-noise ratios or high clutter density. LRDT extends the basic Bayes Markov single target recursion by adding a null state to represent the

  8. Video Tracking Using Acoustic Triangulation 

    E-print Network

    Ivanov, Alexander

    2012-05-03

    This study focuses on the detection and triangulation of sound sources. Specifically, we focus on the detection of sound in order to track a person’s position with a video camera. Acoustic tracking, an alternative to visual tracking, is relatively...

  9. Quality of Slab Track Construction - Track Alignment Design and Track Geometry

    NASA Astrophysics Data System (ADS)

    Šestáková, Janka

    2015-05-01

    The slab track superstructure design (without ballast) is a perspective construction especially for building tunnels and bridges in the modernized sections of railway tracks in Slovakia. Monitoring of the structure described in this article is focused on the transition areas between standard structure with ballast and slab track construction.

  10. On particle track detectors

    NASA Technical Reports Server (NTRS)

    Benton, E. V.; Gruhn, T. A.; Andrus, C. H.

    1973-01-01

    Aqueous sodium hydroxide is widely used to develop charged particle tracks in polycarbonate film, particularly Lexan. The chemical nature of the etching process for this system has been determined. A method employing ultra-violet absorbance was developed for monitoring the concentration of the etch products in solution. Using this method it was possible to study the formation of the etching solution saturated in etch products. It was found that the system super-saturates to a significant extent before precipitation occurs. It was also learned that the system approaches its equilibrium state rather slowly. It is felt that both these phenomena may be due to the presence of surfactant in the solution. In light of these findings, suggestions are given regarding the preparation and maintenance of the saturated etch solution. Two additional research projects, involving automated techniques for particle track analysis and particle identification using AgCl crystals, are briefly summarized.

  11. Marine Animal Tracking

    NSDL National Science Digital Library

    Engineering K-Ph.D. Program,

    Students are introduced to the ideas and implications of animal tracking, which is useful within scientific and commercial industries. For instance, when planning coastal area development, it is important to take into consideration animal presence and movement. Students are engaged in an activity to monitor animal foraging behavior on a spatial scale by working in groups to track each others' movements as they travel a pre-determined course. They record their results individually and collaboratively in an attempt to understand animal movement regarding foraging behavior. Students also engage in a creative design activity, focusing on how they would design a tag for a marine animal of their choice. To conclude, students are questioned about data interpretation and how spatial information is important in relation to commercial, conservation and scientific research decisions.

  12. Thermal Tracking of Sports Players

    PubMed Central

    Gade, Rikke; Moeslund, Thomas B.

    2014-01-01

    We present here a real-time tracking algorithm for thermal video from a sports game. Robust detection of people includes routines for handling occlusions and noise before tracking each detected person with a Kalman filter. This online tracking algorithm is compared with a state-of-the-art offline multi-target tracking algorithm. Experiments are performed on a manually annotated 2-minutes video sequence of a real soccer game. The Kalman filter shows a very promising result on this rather challenging sequence with a tracking accuracy above 70% and is superior compared with the offline tracking approach. Furthermore, the combined detection and tracking algorithm runs in real time at 33 fps, even with large image sizes of 1920 × 480 pixels. PMID:25076219

  13. Fast tracking hospital construction.

    PubMed

    Quirk, Andrew

    2013-03-01

    Hospital leaders should consider four factors in determining whether to fast track a hospital construction project: Expectations of project length, quality, and cost. Whether decisions can be made quickly as issues arise. Their own time commitment to the project, as well as that of architects, engineers, construction managers, and others. The extent to which they are willing to share with the design and construction teams how and why decisions are being made. PMID:23513759

  14. Track & Field Women's Bldg.

    E-print Network

    Escher, Christine

    Ny Navy Gilm More ClkL PSHC MoPl HFC VRL GVGC Hov NFSC Feed HkLg BL EGrn Goss VFbC GEM BalE SSC Buxt Phar Track & Field Women's Bldg. Peavy Intramural Student Legacy Park AVE 14TH 13TH 11TH 10TH A AVE BLVD Sackett Hall Renovation E Women's Building Field Infrastructure Upgrade F Sackett Place

  15. NEKF IMM tracking algorithm

    NASA Astrophysics Data System (ADS)

    Owen, Mark W.; Stubberud, Allen R.

    2004-01-01

    Highly maneuvering threats are a major concern for the Navy and the DoD and the technology discussed in this paper is intended to help address this issue. A neural extended Kalman filter algorithm has been embedded in an interacting multiple model architecture for target tracking. The neural extended Kalman filter algorithm is used to improve motion model prediction during maneuvers. With a better target motion mode, noise reduction can be achieved through a maneuver. Unlike the interacting multiple model architecture which uses a high process noise model to hold a target through a maneuver with poor velocity and acceleration estimates, a neural extended Kalman filter is used to predict corrections to the velocity and acceleration states of a target through a maneuver. The neural extended Kalman filter estimates the weights of a neural network, which in turn are used to modify the state estimate predictions of the filter as measurements are processed. The neural network training is performed on-line as data is processed. In this paper, the simulation results of a tracking problem using a neural extended Kalman filter embedded in an interacting multiple model tracking architecture are shown. Preliminary results on the 2nd Benchmark Problem are also given.

  16. NEKF IMM tracking algorithm

    NASA Astrophysics Data System (ADS)

    Owen, Mark W.; Stubberud, Allen R.

    2003-12-01

    Highly maneuvering threats are a major concern for the Navy and the DoD and the technology discussed in this paper is intended to help address this issue. A neural extended Kalman filter algorithm has been embedded in an interacting multiple model architecture for target tracking. The neural extended Kalman filter algorithm is used to improve motion model prediction during maneuvers. With a better target motion mode, noise reduction can be achieved through a maneuver. Unlike the interacting multiple model architecture which uses a high process noise model to hold a target through a maneuver with poor velocity and acceleration estimates, a neural extended Kalman filter is used to predict corrections to the velocity and acceleration states of a target through a maneuver. The neural extended Kalman filter estimates the weights of a neural network, which in turn are used to modify the state estimate predictions of the filter as measurements are processed. The neural network training is performed on-line as data is processed. In this paper, the simulation results of a tracking problem using a neural extended Kalman filter embedded in an interacting multiple model tracking architecture are shown. Preliminary results on the 2nd Benchmark Problem are also given.

  17. Recognition of ships for long-term tracking

    NASA Astrophysics Data System (ADS)

    van den Broek, Sebastiaan P.; Bouma, Henri; Veerman, Henny E. T.; Benoist, Koen W.; den Hollander, Richard J. M.; Schwering, Piet B. W.

    2014-06-01

    Long-term tracking is important for maritime situational awareness to identify currently observed ships as earlier encounters. In cases of, for example, piracy and smuggling, past location and behavior analysis are useful to determine whether a ship is of interest. Furthermore, it is beneficial to make this assessment with sensors (such as cameras) at a distance, to avoid costs of bringing an own asset closer to the ship for verification. The emphasis of the research presented in this paper, is on the use of several feature extraction and matching methods for recognizing ships from electro-optical imagery within different categories of vessels. We compared central moments, SIFT with localization and SIFT with Fisher Vectors. From the evaluation on imagery of ships, an indication of discriminative power is obtained between and within different categories of ships. This is used to assess the usefulness in persistent tracking, from short intervals (track improvement) to larger intervals (re-identifying ships). The result of this assessment on real data is used in a simulation environment to determine how track continuity is improved. The simulations showed that even limited recognition will improve tracking, connecting both tracks at short intervals as well as over several days.

  18. Putting Off-Track Youths Back on Track to College

    ERIC Educational Resources Information Center

    Steinberg, Adria; Allen, Lili

    2011-01-01

    Back on Track, developed by Jobs for the Future, is a design for schools to not only re-engage off-track and out-of-school youths to graduate from high school, but also to put them on a clear, supported path to a college education. Two schools that have combined Back on Track with the early college model, in which students can earn both a high…

  19. Use of EEG to track visual attention in two dimensions

    NASA Astrophysics Data System (ADS)

    Coleman, Robert Alan

    This thesis investigates the use of EEG to track the spatial locus of covert, visual attention. Three experiments are described that were to detect the position of visual attention as it was deployed towards targets as they appeared. The first experiment uses flickering fields placed in the periphery of the visual field to induce SSVEPs, to be used to track the position of attention which varies horizontally between them. The flickers failed to produce significant SSVEP activity. However attention locus could still able to be tracked by endogenous lateralizations of 12Hz and 18Hz activity. A second experiment was then designed to track attention locus as it varied either horizontally or vertically using only endogenous EEG activity in the alpha (10Hz), low-beta (18Hz), high-beta (24Hz) and gamma (36Hz) bands. Tracking proved successful in all but a small number of subjects. Horizontally varying attention was associated with lateralizations of the alpha band and low-beta band, while vertically varying attention was associated with varying alpha band and low-beta band activity in the occipito-parietal junction over the central sulcus. A third experiment was then performed to track attention locus as it varied in two dimensions. Using a combination of the features found to be informative in the second experiment, tracking proved successful in up to nine bins of two-dimensional visual space. Tracking in either the horizontal or vertical dimension was also successful when attention varied in two dimensions. The success of this method shows that EEG can be used to passively detect the spatial position of attention, at varying degrees of position, as a person attends to objects they see.

  20. ArrayTrack: an FDA and public genomic tool.

    PubMed

    Fang, Hong; Harris, Stephen C; Su, Zhenjiang; Chen, Minjun; Qian, Feng; Shi, Leming; Perkins, Roger; Tong, Weida

    2009-01-01

    A robust bioinformatics capability is widely acknowledged as central to realizing the promises of toxicogenomics. Successful application of toxicogenomic approaches, such as DNA microarrays, inextricably relies on appropriate data management, the ability to extract knowledge from massive amounts of data, and the availability of functional information for data interpretation. At the FDA's National Center for Toxicological Research (NCTR), we are developing a public microarray data management and analysis software, called ArrayTrack, that is also used in the routine review of genomic data submitted to the FDA. ArrayTrack stores a full range of information related to DNA microarrays and clinical and non-clinical studies as well as the digested data derived from proteomics and metabonomics experiments. In addition, ArrayTrack provides a rich collection of functional information about genes, proteins, and pathways drawn from various public biological databases for facilitating data interpretation. Many data analysis and visualization tools are available with ArrayTrack for individual platform data analysis, multiple omics data integration, and integrated analysis of omics data with study data. Importantly, gene expression data, functional information, and analysis methods are fully integrated so that the data analysis and interpretation process is simplified and enhanced. Using ArrayTrack, users can select an analysis method from the ArrayTrack tool box, apply the method to selected microarray data, and the analysis of results can be directly linked to individual gene, pathway, and Gene Ontology analysis. ArrayTrack is publicly available online ( http://www.fda.gov/nctr/science/centers/toxicoinformatics/ArrayTrack/index.htm ) and the prospective user can also request a local installation version by contacting the authors. PMID:19597796

  1. Tracking the GLOMR satellite

    NASA Technical Reports Server (NTRS)

    Reiss, Keith W.; Oneil, Jason C.

    1987-01-01

    The task of day-to-day low orbiting satellite tracking utilizing the NAVSPASUR orbital elements is discussed and methods for improving pass time predictions are presented. Estimates are needed for preprogramming of satellite-initiated communications scheduling which requires an accuracy of approximately 30 seconds. This can be achieved by removing the variance associated with the NAVSPASUR D sub 2 (decay) term. Finally, the shock evidenced in GLOMR's orbit on February 7, 1986 is documented and attributed to a severe solar storm with immediately enhanced drag. GLOMR's life expectancy in orbit is now estimated to have dropped approximately 17% by the end of orbit in early February, 1987.

  2. Silicon Tracking DAQ

    E-print Network

    Aurore Savoy-Navarro; Alex Charpy; Catalin Ciobanu; Jacques David; Marc Dhellot; Jean F. Genat; Th. Hung Pham; Rachid Sefri; Raimon Casanova; Albert Comerma; Angel Dieguez; David Gascon

    2009-03-28

    Some preliminary thoughts on how to design and develop the DAQ architecture for the Silicon tracking system at the future Linear electron positron collider, are briefly presented here. The proposed structure includes three DAQ levels. The first level is based on a high level processing mix-mode ASIC sitting on the detector. The second level still on the detector is a DSP like interface that will send the processed data to the general DAQ system. Several novel technological aspects are part of this development. The role of the ongoing test beam activities with detector prototypes as training camp is emphasized.

  3. Tracking K-essence

    E-print Network

    Takeshi Chiba

    2002-07-25

    We derive a condition for converging a common evolutionary track for k-essence (a scalar field dark energy with non-canonical kinetic terms). For the Lagrangian density V(phi)W(X) with X=dot{phi}^2/2, we find tracker solutions with w_{phi} 3/2. Here w_{phi}(w_B) is the equation-of-state of the scalar field (background radiation/matter). Our condition may be useful for examining the existence of the attractor-like behavior in cosmology with k-essence.

  4. The Central Laser Facility at the Pierre Auger Observatory

    E-print Network

    F. Arqueros; J. Bellido; C. Covault; D. D'Urso; C. Di Giulio; P. Facal; B. Fick; F. Guarino; M. Malek; J. A. J. Matthews; J. Matthews; R. Meyhandan; M. Monasor; M. Mostafa; P. Petrinca; M. Roberts; P. Sommers; P. Travnicek; L. Valore; V. Verzi; L. Wiencke

    2005-07-13

    The Central Laser Facility is located near the middle of the Pierre Auger Observatory in Argentina. It features a UV laser and optics that direct a beam of calibrated pulsed light into the sky. Light scattered from this beam produces tracks in the Auger optical detectors which normally record nitrogen fluorescence tracks from cosmic ray air showers. The Central Laser Facility provides a "test beam" to investigate properties of the atmosphere and the fluorescence detectors. The laser can send light via optical fiber simultaneously to the nearest surface detector tank for hybrid timing analyses. We describe the facility and show some examples of its many uses.

  5. The Central laser facility at the Pierre Auger Observatory

    SciTech Connect

    Arqueros, F.; Bellido, J.; Covault, C.; D'Urso, D.; Di Giulio, C.; Facal, P.; Fick, B.; Guarino, F.; Malek, M.; Matthews, J.A.J.; Matthews, J.; Meyhandan, R.; Monasor,; Mostafa, M.; Petrinca, P.; Roberts, M.; Sommers, P.; Travnicek, P.; Valore, L.; Verzi, V.; Wiencke, Lawrence; /Utah U.

    2005-07-01

    The Central Laser Facility is located near the middle of the Pierre Auger Observatory in Argentina. It features a UV laser and optics that direct a beam of calibrated pulsed light into the sky. Light scattered from this beam produces tracks in the Auger optical detectors which normally record nitrogen fluorescence tracks from cosmic ray air showers. The Central Laser Facility provides a ''test beam'' to investigate properties of the atmosphere and the fluorescence detectors. The laser can send light via optical fiber simultaneously to the nearest surface detector tank for hybrid timing analyses. We describe the facility and show some examples of its many uses.

  6. REC Tracking Systems Design Guide

    SciTech Connect

    Meredith Wingate

    2004-02-03

    OAK-B135 The Design Guide is presented in three parts. Section II describes the need for REC tracking, the two principal tracking methods available, and, in simple terms, the operation of certificate-based systems. Section III presents the major issues in the design of certificate-based tracking systems and discusses the advantages and disadvantages of alternative solutions. Finally, Section IV offers design principles or recommendations for most of these issues.

  7. Chemical cloud tracking systems

    NASA Astrophysics Data System (ADS)

    Grim, Larry B.; Gruber, Thomas C., Jr.; Marshall, Martin; Rowland, Brad

    2002-02-01

    This paper describes the Chemical Cloud Tracking System (CCTS) which has been installed at Dugway Proving Ground. The CCTS allows mapping of chemical clouds in real time from a safe standoff distance. The instruments used are passive standoff chemical agent detectors (FTIRs). Each instrument individually can only measure the total of all the chemical in its line-of-site; the distance to the cloud is unknown. By merging data from multiple vantage points (either one instrument moving past the cloud or two or more instruments spaced so as to view the cloud from different directions) a map of the cloud locations can be generated using tomography. To improve the sensitivity and accuracy of the cloud map, chemical point sensors can be added to the sensor array being used. The equipment required for the CCTS is commercially available. Also, the data fusion techniques (tomography) have been demonstrated previously in the medical field. The Chemical Cloud Tracking System can monitor the movement of many chemical clouds of either military or industrial origin. Since the technique is standoff, the personnel are not exposed to toxic hazards while they follow the cloud. Also, the equipment works on-the-move which allows rapid response to emergency situations (plant explosions, tanker car accidents, chemical terrorism, etc.).

  8. Cassini Archive Tracking System

    NASA Technical Reports Server (NTRS)

    Conner, Diane; Sayfi, Elias; Tinio, Adrian

    2006-01-01

    The Cassini Archive Tracking System (CATS) is a computer program that enables tracking of scientific data transfers from originators to the Planetary Data System (PDS) archives. Without CATS, there is no systematic means of locating products in the archive process or ensuring their completeness. By keeping a database of transfer communications and status, CATS enables the Cassini Project and the PDS to efficiently and accurately report on archive status. More importantly, problem areas are easily identified through customized reports that can be generated on the fly from any Web-enabled computer. A Web-browser interface and clearly defined authorization scheme provide safe distributed access to the system, where users can perform functions such as create customized reports, record a transfer, and respond to a transfer. CATS ensures that Cassini provides complete science archives to the PDS on schedule and that those archives are available to the science community by the PDS. The three-tier architecture is loosely coupled and designed for simple adaptation to multimission use. Written in the Java programming language, it is portable and can be run on any Java-enabled Web server.

  9. NORAD satellite tracking

    NASA Technical Reports Server (NTRS)

    Liu, Joseph J. F.

    1987-01-01

    NORAD routinely tracks about 6000 orbiting objects. During the last 30 days of orbital time, prior to reentry, special perturbations are used in the orbital update procedure. Besides routine orbit determination, NORAD does special tasks such as predicting satellite orbit conjunctions within 20 km, ephimerides of weather satellites, satellite decay predictions and other studies. Since their mission is operational, they do not store the data from their analyses. The ballistic coefficient is not known for most of the orbiting objects. If a ballistic coefficient were derived that was consistent with one density model, it might give erroneous results if used with a different density model. Given the ballistic coefficient, density values could, in principle, be obtained from their tracking data. The densities would represent an integrated mean over the orbital path near perigee. They would be model dependent and would not necessarily represent the real density. In summary, the primary need is for reliable forecasts of solar flux (F10.7) and geomagnetic activity (Ap) in the 1 to 4 week time scale. Forecasts over longer time spans would also be useful for special projects.

  10. Goal Representations Dominate Superior Colliculus Activity during Extrafoveal Tracking

    PubMed Central

    Hafed, Ziad M.; Krauzlis, Richard J.

    2009-01-01

    The primate superior colliculus (SC) has long been known to be involved in saccade generation. However, SC neurons also exhibit fixation-related and smooth-pursuit-related activity. A parsimonious explanation for these seemingly disparate findings is that the SC contains a map of behaviorally relevant goal locations, rather than just a motor map for saccades and fixation. This explanation predicts that SC activity should reflect the behavioral goal, even when the behavioral response is not fixation or saccades, and even if the goal does not correspond to a visual stimulus. We tested this prediction by employing a tracking task that dissociates the stimulus and goal locations. In this task, monkeys tracked the invisible midpoint between two peripheral bars, such that the visual stimuli were peripheral but the goal was foveal/parafoveal. We recorded from SC neurons representing peripheral locations associated with the stimulus or central locations associated with the goal. Most neurons with peripheral response fields did not respond differently during tracking than during passive viewing of the stimulus under fixation; most neurons with central response fields responded more during tracking than during fixation, despite the lack of a visual stimulus. Moreover, the spatial distribution of activity during tracking was larger than that during fixation or tracking of a foveal stimulus, suggesting that the greater spatial uncertainty about the invisible goal corresponded to more widespread SC activity. These results demonstrate the flexibility with which activity across the SC represents the location - and also the spatial precision - of behaviorally relevant goals for multiple eye movements. PMID:18799675

  11. Estimation of track-soil interactions for autonomous tracked vehicles

    Microsoft Academic Search

    Anh Tuan Le; D. C. Rye; H. F. Durrant-Whyte

    1997-01-01

    Real time estimation of soil parameters is essential in achieving precise, robust autonomous guidance and control of a tracked vehicle. The paper shows that the slip of the tracks over the terrain can be identified from trajectory data using an extended Kalman filter. The use of a suitable soil model can then allow key soil parameters to be estimated as

  12. GRADUATE SCHOOL TRACKING PROGRAM HOW TO's GRADUATE SCHOOL TRACKING PROGRAM

    E-print Network

    Pilyugin, Sergei S.

    a common program that tracks Graduate student support Straightforward means of communications Dashboard for GSF and other awards What's To Be Tracked? Graduate School Fellowships Grinter Awards Mc Santa Fe Fellowships All Graduate School Support Department Support (Optional) Other Awards (Optional

  13. 2. West portal of Tunnel 27, contextual view from track ...

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

    2. West portal of Tunnel 27, contextual view from track level east of Tunnel 26 (HAER CA-202), 210mm lens. Note solar panel providing signal power, evidence of continuing updating of technology by the railroad. Single-light searchlight-type signal was typical system-wide on the Southern Pacific prior to the 1980s merger with the Denver & Rio Grande Western. - Central Pacific Transcontinental Railroad, Tunnel No. 27, Milepost 133.9, Applegate, Placer County, CA

  14. Tracking of mobile robot system

    Microsoft Academic Search

    Cheng Jun; Wang Tao

    2011-01-01

    this paper is based on Intel established open source computer vision library (OpenCV) software system. This system can track a red object in the scene of the tracking system, and can be relatively effective to avoid the interference of light in the scene. Contour by calculating the position in the image center of gravity to control the robot's rotation, while

  15. Visual Odometry for Tracked Vehicles

    Microsoft Academic Search

    Christian Dornhege; Alexander Kleiner

    Localization and mapping on autonomous robots typically requires a good pose estimate, which is hard to acquire if the vehicle is tracked. In this paper we describe a solution to the pose estimation problem by utilizing a consumer-quality camera and an Inertial Measurement Unit (IMU). The basic idea is to continuously track salient features with the KLT feature tracker (12)

  16. CONTRACT ADMINISTRATIVE TRACKING SYSTEM (CATS)

    EPA Science Inventory

    The Contract Administrative Tracking System (CATS) was developed in response to an ORD NHEERL, Mid-Continent Ecology Division (MED)-recognized need for an automated tracking and retrieval system for Cost Reimbursable Level of Effort (CR/LOE) Contracts. CATS is an Oracle-based app...

  17. Geoanalytic applications of particle tracks

    Microsoft Academic Search

    David E. Fisher

    1975-01-01

    Since the discovery that ionizing tracks left by highly energetic nuclei can be made visible through optical microscopes by proper etching, the field of particle track studies has blossomed at a rate equalled only by the growth of the porno-film industry. The analytic applications alone are probably unique in the wide range of results and fields of study that have

  18. Computer simulation of dinosaur tracks

    Microsoft Academic Search

    Peter L. Falkingham

    2010-01-01

    Fossil tracks represent the only direct record of behaviour and locomotion of extinct animals. A computer model using finite element analysis (FEA) has been developed to simulate vertebrate track formation in cohesive substrates. This model has been designed for, and successfully run on, high performance computing (HPC) resources. A number of individual studies were carried out using the computer model

  19. Making Sense of Dinosaur Tracks

    ERIC Educational Resources Information Center

    MacKenzie, Ann Haley; McDowell, Brian

    2012-01-01

    What do paleontologists, dinosaur tracks, and the nature of science have in common? They're combined here in an inquiry activity where students use methods of observation and inference to devise evidence-based explanations for the data they collect about dinosaur tracks, much like the methods used by paleontologists. Students then debate the…

  20. Environmental Studies Minor Sustainability Track

    E-print Network

    , and decision-making in pursuit of sustainability goals Example courses: ECON 75 Environmental and Energy2/17/14 Environmental Studies Minor Sustainability Track W O R K S H E E T The sustainability track requires six courses total, including one prerequisite, and follows the requirements for the Environmental

  1. Autonomous ground vehicle path tracking

    Microsoft Academic Search

    Jeff Wit; Carl D. Crane III; David G. Armstrong II

    2004-01-01

    Autonomous ground vehicle navigation requires the integration of many technologies such as path planning, position and orientation sensing, vehicle control, and obstacle avoidance. The work presented here focuses on the control of a nonholonomic ground vehicle as it tracks a given path. A new path tracking technique called ''vector pursuit'' is presented. This new technique is based on the theory

  2. A fusion method of data association and virtual detection for minimizing track loss and false track

    Microsoft Academic Search

    Young-Chul Lim; Chung-Hee Lee; Soon Kwon; Jong-hun Lee

    2010-01-01

    In this paper, we present a method to track multiple moving vehicles using the global nearest neighborhood (GNN) data association (DA) based on 2D global position and virtual detection based on motion tracking. Unlikely the single target tracking, multiple target tracking needs to associate observation-to-track pairs. DA is a process to determine which measurements are used to update each track.

  3. Microencapsulated cell tracking

    PubMed Central

    Arifin, Dian R.; Kedziorek, Dorota A.; Fu, Yingli; Chan, Kannie W. Y.; McMahon, Michael T.; Weiss, Clifford R.; Kraitchman, Dara L.; Bulte, Jeff W. M.

    2013-01-01

    Microencapsulation of therapeutic cells has been widely pursued to achieve cellular immunoprotection following transplantation. Initial clinical studies have shown the potential of microencapsulation using semi-permeable alginate layers, but much needs to be learned about the optimal delivery route, in vivo pattern of engraftment, and microcapsule stability over time. In parallel with noninvasive imaging techniques for ‘naked’ (i.e. unencapsulated) cell tracking, microcapsules have now been endowed with contrast agents that can be visualized by 1H MRI, 19F MRI, X-ray/computed tomography and ultrasound imaging. By placing the contrast agent formulation in the extracellular space of the hydrogel, large amounts of contrast agents can be incorporated with negligible toxicity. This has led to a new generation of imaging biomaterials that can render cells visible with multiple imaging modalities. PMID:23225358

  4. Radar waveform diversity for tracking

    NASA Astrophysics Data System (ADS)

    Grishin, Yury

    2009-06-01

    The paper presents a brief survey of the main approaches for solving the problem of radar waveform selection for optimal tracking. The traditional approach to the system design has been to treat the detection and tracking subsystems as completely separate entities. In last years some new types of radars equipped with highly agile software driven waveform generators have appeared. This makes it possible to change the transmitted waveform at each time step for obtaining minimal tracking errors. Thus the problem of the waveform selection can be formulated as the optimisation problem of the following form: for given class of signals and target movement model to find the tracking filter structure and waveform parameter sequence which result in a minimum variance estimate of the target state vector. Two main approaches to waveform optimising have been considered in the paper: the control theoretic approach and information theoretic approach. The relationships between sensor characteristics and tracking algorithm are discussed.

  5. Monte Carlo simulation for the scintillating fibres tracking detector and its resolution evaluation

    Microsoft Academic Search

    C. D'Ambrosio; S. Qian

    1993-01-01

    For the scintillating fibres tracking detector (SFTD) [C. D'Ambrosio et al., Nucl. Instr. and Meth. A 322 (1992) 20] to be used as central tracker in a supercollider experiment, a Monte Carlo simulation has been performed to study its basic features. Charged particles with momenta up to 10 TeV\\/c have been tracked inside the detector at different polar angles in

  6. 3. 'C.P. Reconstruction Rocklin to Colfax, Standard Double Track Tunnel ...

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

    3. 'C.P. Reconstruction Rocklin to Colfax, Standard Double Track Tunnel Portal Stones, Wings Parallel to Center Line, Ring Stones,' Southern Pacific Standard Double-Track Tunnel, ca. 1909. Compare to photos in documentation sets for Tunnel 18 (HAER No. CA-197), Tunnel 34 (HAER No. CA-206), and Tunnel 1 (HAER No. CA-207). - Central Pacific Transcontinental Railroad, Sacramento to Nevada state line, Sacramento, Sacramento County, CA

  7. Video Tracking of Humans in Robotic Environments

    E-print Network

    Tracking System . . . . . . . . . . . . . . . . . . . . . . . . . 37 1 #12;Contents 2 4.1.1 Target Representation . . . . . . . . . . . . . . . . . . 38 4.1.2 Target Tracking.2.1 Target Representation . . . . . . . . . . . . . . . . . . 40 4.2.2 Target Tracking

  8. Some puzzling findings in multiple object tracking (MOT): I. Tracking without keeping track of object identities

    Microsoft Academic Search

    Zenon W. Pylyshyn

    2003-01-01

    The task of tracking a small number (about 4 or 5) visual targets within a larger set of identical items, each of which moves randomly and independently, has been used extensively to study object-based attention. Analysis of this multiple-object tracking task shows that it logically entails solving the correspondence problem for each target over time, and thus that the individuality

  9. Patrol car and agent tracking/suspect tagging and tracking

    NASA Astrophysics Data System (ADS)

    Wilkins, Steven C.

    1997-01-01

    Emerging technologies in the field of law enforcement are providing today's law enforcement personnel with the advantage of an innovative and faster means of providing safety and service to the public. The use of open such technology, the Automatic Vehicle Locator (AVL) tracking device, is fast becoming a commonplace and cost-effective solution for agencies to efficiently command and control their 'officer' assets. Through the use of AVL's global positioning satellite-based system, the response time of law enforcement is greatly enhanced by permitting a dispatcher to visually identify and assign the officer closest to the location of an accident or incident. The system is effective in reducing delays due to highway blockages, improving the level of protection to the motoring public, and promoting the flow of traffic on busy freeways. Likewise, an officer or agent in distress can be assured that a dispatcher will be constantly aware of his or her location in the field. In the 1990's the demands on law enforcement agencies have grown tremendously. this is due primarily to population increases, limited funding or resources, and increases in drug, property and violent crimes. Frequently, the automobile is used for escape after the commission of these crimes. This often results in high speed pursuits involving law enforcement agencies. In California, by statute, the California Highway Patrol is the central repository for data regarding all pursuits involving state and local law enforcement agencies. Statistics show that more than 10 percent of pursuits result in injuries to the violator and/or innocent bystanders. Most pursuits last less than 10 minutes, and the AVL system provides a tremendous advantage to law enforcement's ability to immediately deploy and direct units into pursuits for rapid closure of the incident. AVL systems not only reduce the risk of personal injury by minimizing public exposure to the unsafe incident, but also enhance officer safety during the high speed chase by pinpointing officer deployment. Officer safety is a primary concern for all law enforcement agencies, nationwide. In addition to the aforementioned benefits of AVL, this system ensures that dispatchers are continually aware of an officer's location. This is a critical feature for an officer who is unable to verbally provide his/her location over the radio due to adversarial or injury circumstances. AVL technology is neither rate nor risky, and it is fast becoming an accepted and cost-effective solution in law enforcement agencies, large and small. The challenge to industry is not merely the development of new AVL technology, but also the ease in which it will integrate with existing law enforcement systems.

  10. Analysis of the Influence of Cracked Sleepers under Static Loading on Ballasted Railway Tracks

    PubMed Central

    Montalbán Domingo, Laura; Zamorano Martín, Clara; Palenzuela Avilés, Cristina; Real Herráiz, Julia I.

    2014-01-01

    The principal causes of cracking in prestressed concrete sleepers are the dynamic loads induced by track irregularities and imperfections in the wheel-rail contact and the in-phase and out-of-phase track resonances. The most affected points are the mid-span and rail-seat sections of the sleepers. Central and rail-seat crack detection require visual inspections, as legislation establishes, and involve sleepers' renewal even though European Normative considers that thicknesses up to 0.5?mm do not imply an inadequate behaviour of the sleepers. For a better understanding of the phenomenon, the finite element method constitutes a useful tool to assess the effects of cracking from the point of view of structural behaviour in railway track structures. This paper intends to study how the cracks at central or rail-seat section in prestressed concrete sleepers influence the track behaviour under static loading. The track model considers three different sleeper models: uncracked, cracked at central section, and cracked at rail-seat section. These models were calibrated and validated using the frequencies of vibration of the first three bending modes obtained from an experimental modal analysis. The results show the insignificant influence of the central cracks and the notable effects of the rail-seat cracks regarding deflections and stresses. PMID:25530998

  11. Cooperative Modeling and Design History Tracking Using Design Tracking Matrix 

    E-print Network

    Kim, Jonghyun

    2010-10-12

    and redundancies, and preventing infeasible designs. This framework provides methods to track optimal design path and redundant design history in the overall design process. This cooperative modeling architecture consists of a modeling server and voxel-based multi...

  12. North America Europe Central &

    E-print Network

    Johnson, Matthew

    1 North America Western Europe Central & Eastern Europe Latin America & Caribbean Middle East & Central Asia Asia Pacific Africa Population (100 millions) 0 5 10 15 20 25 30 35 North America Western Europe Central & Eastern Europe Latin America & Caribbean Middle East & Central Asia Asia Pacific Africa

  13. Toward Robust Online Visual Tracking

    NASA Astrophysics Data System (ADS)

    Yang, Ming-Hsuan; Ho, Jeffrey

    We pursue a research direction that will empower machines with simultaneous tracking and recognition capabilities similar to human cognition. Toward that, we develop algorithms that leverage prior knowledge/model obtained offline with information available online via novel learning algorithms. While humans can effortlessly locate moving objects in different environments, visual tracking remains one of the most important and challenging problems in computer vision. Robust cognitive visual tracking algorithms facilitate answering important questions regarding how objects move and interact in complex environments. They have broad applications including surveillance, navigation, human computer interfaces, object recognition, motion analysis and video indexing, to name a few.

  14. Visual object recognition and tracking

    NASA Technical Reports Server (NTRS)

    Chang, Chu-Yin (Inventor); English, James D. (Inventor); Tardella, Neil M. (Inventor)

    2010-01-01

    This invention describes a method for identifying and tracking an object from two-dimensional data pictorially representing said object by an object-tracking system through processing said two-dimensional data using at least one tracker-identifier belonging to the object-tracking system for providing an output signal containing: a) a type of the object, and/or b) a position or an orientation of the object in three-dimensions, and/or c) an articulation or a shape change of said object in said three dimensions.

  15. High resolution track etch autoradiography

    DOEpatents

    Solares, G.; Zamenhof, R.G.

    1994-12-27

    A detector assembly is disclosed for use in obtaining alpha-track autoradiographs, the detector assembly including a substantially boron-free substrate; a detector layer deposited on the substantially boron-free substrate, the detector layer being capable of recording alpha particle tracks and exhibiting evidence of the alpha tracks in response to being exposed to an etchant, the detector layer being less than about 2 microns thick; and a protective layer deposited on the detector layer, the protective layer being resistant to the etchant and having a thickness of about 0.5 to 1 microns. 13 figures.

  16. Fluorescent image tracking velocimeter

    DOEpatents

    Shaffer, Franklin D. (Library, PA)

    1994-01-01

    A multiple-exposure fluorescent image tracking velocimeter (FITV) detects and measures the motion (trajectory, direction and velocity) of small particles close to light scattering surfaces. The small particles may follow the motion of a carrier medium such as a liquid, gas or multi-phase mixture, allowing the motion of the carrier medium to be observed, measured and recorded. The main components of the FITV include: (1) fluorescent particles; (2) a pulsed fluorescent excitation laser source; (3) an imaging camera; and (4) an image analyzer. FITV uses fluorescing particles excited by visible laser light to enhance particle image detectability near light scattering surfaces. The excitation laser light is filtered out before reaching the imaging camera allowing the fluoresced wavelengths emitted by the particles to be detected and recorded by the camera. FITV employs multiple exposures of a single camera image by pulsing the excitation laser light for producing a series of images of each particle along its trajectory. The time-lapsed image may be used to determine trajectory and velocity and the exposures may be coded to derive directional information.

  17. The Physics of Fast Track

    ERIC Educational Resources Information Center

    Kibble, Bob

    2007-01-01

    Toys can provide motivational contexts for learning and teaching about physics. A cheap car track provides an almost frictionless environment from which a quantitative study of conservation of energy and circular motion can be made.

  18. Solar Angles and Tracking Systems

    NSDL National Science Digital Library

    Integrated Teaching and Learning Program,

    Students learn about the daily and annual cycles of solar angles used in power calculations to maximize photovoltaic power generation. They gain an overview of solar tracking systems that improve PV panel efficiency by following the sun through the sky.

  19. Tracking Down the Real Story.

    ERIC Educational Resources Information Center

    Dyche, Steven E.; Stefanich, Greg

    1989-01-01

    Presents a strategy for science learning through a game activity which uses human and/or animal footprints. Provides numerous ideas for creativity in constructing a story and adapting tracks for experiential experiences. (RT)

  20. Biomedical Engineering Specialization Tracks Biomechanics

    E-print Network

    Ge, Qiaode Jeff

    techniques. Cellular & Molecular Cellular, Tissue and Genetic Engineering: involve more recent attemptsBiomedical Engineering Specialization Tracks Biomechanics Applies classical mechanics (statics and musculoskeletal systems, among others. Biomaterials The selection of an appropriate material to place in the human

  1. Automatic electronic fish tracking system

    NASA Technical Reports Server (NTRS)

    Osborne, P. W.; Hoffman, E.; Merriner, J. V.; Richards, C. E.; Lovelady, R. W.

    1976-01-01

    A newly developed electronic fish tracking system to automatically monitor the movements and migratory habits of fish is reported. The system is aimed particularly at studies of effects on fish life of industrial facilities which use rivers or lakes to dump their effluents. Location of fish is acquired by means of acoustic links from the fish to underwater Listening Stations, and by radio links which relay tracking information to a shore-based Data Base. Fish over 4 inches long may be tracked over a 5 x 5 mile area. The electronic fish tracking system provides the marine scientist with electronics which permit studies that were not practical in the past and which are cost-effective compared to manual methods.

  2. Edge tracking using tactile servo

    Microsoft Academic Search

    N. Chen; H. Zhang; R. Rink

    1995-01-01

    A novel method to perform edge tracking using tactile sensors is presented in this paper. Using the tactile servo scheme, a robot manipulator is driven only by real-time tactile feedback from the array tactile sensors mounted directly on the robot end-effector. Compared with previous approaches, the control scheme presented in this paper is consistent and more efficient. Real-time edge tracking

  3. Track coverage in sensor networks

    Microsoft Academic Search

    Silvia Ferrari

    2006-01-01

    So far coverage problems have been formulated to address area coverage or to maintain line-of-sight visibility in the presence of obstacles (i.e., art-gallery problems). Although sensor networks often are employed to track moving targets, none of the existing formulations deal with the problem of allocating sensors in order to achieve track-formation capabilities over a region of interest. This paper investigates

  4. Silicon Tracking Upgrade at CDF

    SciTech Connect

    Kruse, M.C. [Rochester Univ., NY (United States); CDF Collaboration

    1998-04-01

    The Collider Detector at Fermilab (CDF) is scheduled to begin recording data from Run II of the Fermilab Tevatron in early 2000. The silicon tracking upgrade constitutes both the upgrade to the CDF silicon vertex detector (SVX II) and the new Intermediate Silicon Layers (ISL) located at radii just beyond the SVX II. Here we review the design and prototyping of all aspects of these detectors including mechanical design, data acquisition, and a trigger based on silicon tracking.

  5. Tracking group co-membership on networks

    Microsoft Academic Search

    J. P. Ferry; J. O. Bumgarner

    2010-01-01

    Tracking groups in network data is an emerging problem in network science. The network science community has not leveraged the tracking techniques used in data fusion, however. The purpose of this work is to introduce a novel domain to the tracking community, and novel techniques to network science. Group tracking is formulated here as a traditional, continuous-time Bayesian filter, which

  6. Microsoft Cambridge at TREC 2002: Filtering Track

    Microsoft Academic Search

    Stephen E. Robertson; Steve Walker; Hugo Zaragoza; Ralf Herbrich

    2002-01-01

    SW alker † 1 Summary Apart from a short description of our Query Track contri- bution, this report is concerned with the Adaptive Filter- ing track only. There is a separate report in this volume (1)on the Microsoft Research Cambridge participation in QA track. A number of runs were submitted for the Adaptive Fil- tering track, on all tasks (adaptive

  7. Microsoft Cambridge at TREC9: Filtering Track

    Microsoft Academic Search

    Stephen E. Robertson; Steve Walker

    2000-01-01

    1 Summary Apart from a short description of our Query Track contri- bution, this report is concerned with the Adaptive Filter- ing track only. There is a separate report in this volume (1) on the Microsoft Research Cambridge participation in QA track. A number of runs were submitted for the Adaptive Fil- tering track, on all tasks (adaptive filtering, batch

  8. Color Invariant SURF in Discriminative Object Tracking

    E-print Network

    Smeulders, Arnold

    Color Invariant SURF in Discriminative Object Tracking Dung Manh Chu and Arnold W.M. Smeulders. In this paper, we propose to use color invari- ant SURF features in the discriminative tracking. This set to track objects under cluttered scenes and partial occlusion. Key words: tracking, surf, color, invariant

  9. Quantum control design via adaptive tracking

    Microsoft Academic Search

    Wusheng Zhu; Herschel Rabitz

    2003-01-01

    An adaptive tracking algorithm is developed to achieve quantum system control field designs. The adaptive algorithm has the advantage of operating noniteratively to efficiently find desirable controls, and has the feature of high stability by suppressing the influence of disturbances from tracking singularities. The core of the adaptive tracking control algorithm is a self-learning track switch technique which is triggered

  10. A field transition particle filter tracking algorithm

    Microsoft Academic Search

    De-Jiang Xu; Ze-Lin Shi; Xin-Rong Yu; Qing-Hai Ding; Hai-Bo Luo

    2011-01-01

    Visual tracking is a critical task in many computer vision applications such as surveillance, vehicle tracking, and motion analysis. The challenges in designing a robust visual tracking algorithm are caused by the presence of background clutter, occlusion, and illumination changes. In this paper, we propose a visual tracking algorithm in a particle filter framework to overcome these three challenging issues.

  11. Visuomotor Tracking Ability of Young Adult Speakers.

    ERIC Educational Resources Information Center

    Moon, Jerald B.; And Others

    1993-01-01

    Twenty-five normal young adult speakers tracked sinusoidal and unpredictable target signals using lower lip and jaw movement and fundamental frequency modulation. Tracking accuracy varied as a function of target frequency and articulator used to track. Results show the potential of visuomotor tracking tasks in the assessment of speech articulatory…

  12. SLR tracking of GPS-35

    NASA Technical Reports Server (NTRS)

    Pavlis, Erricos C.

    1994-01-01

    An experiment was designed to launch a corner cube retroreflector array on one of the Global Positioning Satellites (GPS). The launch on Aug. 31, 1993 ushered in the era of SLR tracking of GPS spacecraft. Once the space operations group finished the check-out procedures for the new satellite, the agreed upon SLR sites were allowed to track it. The first site to acquire GPS-35 was the Russian system at Maidanak and closely after the MLRS system at McDonald Observatory, Texas. The laser tracking network is currently tracking the GPS spacecraft known as GPS-35 or PRN 5 with great success. From the NASA side there are five stations that contribute data regularly and nearly as many from the international partners. Upcoming modifications to the ground receivers will allow for a further increase in the tracking capabilities of several additional sites and add some desperately needed southern hemisphere tracking. We are analyzing the data and are comparing SLR-derived orbits to those determined on the basis of GPS radiometric data.

  13. Tracking protein aggregate interactions

    PubMed Central

    Bartz, Jason C; Nilsson, K Peter R

    2011-01-01

    Amyloid fibrils share a structural motif consisting of highly ordered ?-sheets aligned perpendicular to the fibril axis.1, 2 At each fibril end, ?-sheets provide a template for recruiting and converting monomers.3 Different amyloid fibrils often co-occur in the same individual, yet whether a protein aggregate aids or inhibits the assembly of a heterologous protein is unclear. In prion disease, diverse prion aggregate structures, known as strains, are thought to be the basis of disparate disease phenotypes in the same species expressing identical prion protein sequences.4–7 Here we explore the interactions reported to occur when two distinct prion strains occur together in the central nervous system. PMID:21597336

  14. Iceland hotspot track

    NASA Astrophysics Data System (ADS)

    Lawver, Lawrence A.; Dietmar Müller, R.

    1994-04-01

    We use a model of plate motions relative to major hotspots underneath the African, Indian, North American, South American, and Australian plates to compute the track of the Iceland hotspot after 130 Ma. The present-day hotspot is located under eastern Iceland offset about 240 km east of the Reykjanes and Kolbeinsey ridges. At 40 Ma, the Kangerlussuaq region of East Greenland would have been directly above the hotspot. The anomalous postdrift uplift of the East Greenland margin can also be explained by passage of the rifted margin over a hotspot. At 60 Ma, the Umanak Fjord region of the west coast of Greenland was above the hotspot, where picrites and hyaloclastites of nearby Disko Island are dated at ˜64 to 59 Ma. Our reconstruction shows Ellesmere Island above the hotspot between 130 and 100 Ma. Latest Albian to early Cenomanian volcanic rocks on Axel Heiberg Island and northern Ellesmere Island indicate a nearby hotspot at that time. At 130 Ma, our model locates the hotspot near the northern margin of Ellesmere Island, close to the intersection of the Alpha Ridge with the coast. The hotspot would have been located beneath the Arctic Alaska-Chukotka plate when it formed the Mendeleyev Ridge, and as the spreading center migrated over the hotspot, it transferred to the North American plate, where it formed the Alpha Ridge. Our model suggests that the initiation of the Iceland hotspot predates the opening of the North Atlantic by at least 70 m.y. and that the massive early Tertiary volcanism along the North Atlantic plate margins reflects the effect of rifting in the vicinity of existing thinned crust, rather than the arrival of a plume head.

  15. Digital Pulse Processing and Gamma Ray Tracking

    NSDL National Science Digital Library

    Two of the big changes in new generations of Nuclear Physics instrumentation will be the incorporation of digital processing and the use of gamma ray tracking. The Nuclear Physics Group at Daresbury has set up a project to investigate digital pulse processing for gamma ray detectors and how best to implement gamma ray tracking in large Germanium gamma ray detectors. Topics on this site include but are not limited to: gamma ray tracking, overview of the Gamma Ray Tracking Project, pictures of one of the tracking gamma ray detectors (TIGRE), pictures of test experiment, gamma ray tracking project publications, and links to other gamma ray tracking pages.

  16. UUV-platform cooperation in covert tracking

    NASA Astrophysics Data System (ADS)

    Blanding, Wayne R.; Willett, Peter K.; Bar-Shalom, Yaakov; Lynch, Robert S.

    2005-09-01

    In underwater tracking, such as with an unmanned undersea vehicle (UUV) or torpedo it is advantageous to track a target covertly. The Maximum Likelihood-Probabilistic Data Association (ML-PDA) tracking algorithm, which has been demonstrated to establish and maintain track in low SNR/high clutter environments, is used to develop track information in a covert tracking application. By combining intermittent sensor data (active sonar) from the UUV with that of the launch platform (passive sonar) in the ML-PDA track algorithm, fewer active transmissions are required to establish and maintain a given track accuracy thereby reducing the chance of target alertment. We show that this is a viable operating model and demonstrate how sensor placement affects track accuracy, including determination of best sensor placement and requirements on active transmissions to maintain minimum tracking accuracy.

  17. A Track-To-Track Association Method for Automotive Perception Systems

    E-print Network

    Paris-Sud XI, Université de

    -tracks in order to get upper level tracks, called system-tracks in this paper. It is a track-level data fusion and heterogeneous sensors, at the different stages of the process. This paper presents a modular high- level track-fusion]. The sensors work independently and the high level of abstraction of the data they provide allow

  18. Sensing Technologies for Railway Track Maintenance

    NASA Astrophysics Data System (ADS)

    Takai, Hideyuki

    Railway track is has unique character that it deforms gradually under repetitive train passage. It is no exaggeration to say that track technology is essentially maintenance technology. To maintain sufficient track condition for train running safety and passenger riding comfort, various kinds of inspection are carried with various methods. This paper introduces the state-of-the-art sensing technologies applied for track maintenance. We hope this information will inspire engineers in sensing technology field to develop new application for future track maintenance.

  19. Soviet deep-space flight tracking network

    NASA Astrophysics Data System (ADS)

    Gusev, L. I.; Grishmanovskii, V. A.; Molotov, E. P.

    The structure of the Soviet Ground Automatic Control Complex for deep-space flight tracking is described. Attention is given to the tracking network stations, the operational control group at the mission control center, the ballistic center, the communication facilities, and the spacecraft tracking stations. Also described are the basic performance characteristics of the spacecraft tracking station, the trajectory measurement system, and the programmed-command information system of the Soviet spaceflight tracking network.

  20. Tracking scanning laser ophthalmoscope (TSLO)

    NASA Astrophysics Data System (ADS)

    Hammer, Daniel X.; Ferguson, R. Daniel; Magill, John C.; White, Michael A.; Elsner, Ann E.; Webb, Robert H.

    2003-07-01

    The effectiveness of image stabilization with a retinal tracker in a multi-function, compact scanning laser ophthalmoscope (TSLO) was demonstrated in initial human subject tests. The retinal tracking system uses a confocal reflectometer with a closed loop optical servo system to lock onto features in the fundus. The system is modular to allow configuration for many research and clinical applications, including hyperspectral imaging, multifocal electroretinography (MFERG), perimetry, quantification of macular and photo-pigmentation, imaging of neovascularization and other subretinal structures (drusen, hyper-, and hypo-pigmentation), and endogenous fluorescence imaging. Optical hardware features include dual wavelength imaging and detection, integrated monochromator, higher-order motion control, and a stimulus source. The system software consists of a real-time feedback control algorithm and a user interface. Software enhancements include automatic bias correction, asymmetric feature tracking, image averaging, automatic track re-lock, and acquisition and logging of uncompressed images and video files. Normal adult subjects were tested without mydriasis to optimize the tracking instrumentation and to characterize imaging performance. The retinal tracking system achieves a bandwidth of greater than 1 kHz, which permits tracking at rates that greatly exceed the maximum rate of motion of the human eye. The TSLO stabilized images in all test subjects during ordinary saccades up to 500 deg/sec with an inter-frame accuracy better than 0.05 deg. Feature lock was maintained for minutes despite subject eye blinking. Successful frame averaging allowed image acquisition with decreased noise in low-light applications. The retinal tracking system significantly enhances the imaging capabilities of the scanning laser ophthalmoscope.

  1. Denudation of the Cte d'Ivoire-Ghana transform continental margin from apatite fission tracks *Florence Bigot-Cormier, **Christophe Basile, ***Grard Poupeau,

    E-print Network

    Denudation of the Côte d'Ivoire-Ghana transform continental margin from apatite fission tracks Apatite fission track analysis of samples from the shoulder (marginal ridge) of the Côte d'Ivoire-Ghana transform continental margin reveal a cooling of the margin between 85 and 65 Ma for the central and eastern

  2. Central venous catheters - ports

    MedlinePLUS

    Central venous catheter - subcutaneous; Port-a-Cath; InfusaPort; PasPort; Subclavian port; Medi - port; Central venous line - port ... Catheters are used when you need medical treatment over a long period of time. For example, you ...

  3. Central Limit Theorem

    NSDL National Science Digital Library

    David M. Lane

    This site from David Lane features a description of the central limit theorem used in statistics. Examples of frequency distributions are shown, and there is also a link to an interactive demonstration of the central limit theorem.

  4. Central and peripheral demyelination

    PubMed Central

    Mehndiratta, Man Mohan; Gulati, Natasha Singh

    2014-01-01

    Several conditions cause damage to the inherently normal myelin of central nervous system, perepheral nervous system or both central and perepheral nervous system and hence termed as central demyelinating diseases, perepheral demyelinating diseases and combined central and perepheral demyelinating diseases respectively. Here we analysed and foccused on the etiology, prevalance, incidence and age of these demyelinating disorders. Clinical attention and various diagnostic tests are needed to adequately assess all these possibilities. PMID:24741263

  5. Track structure in biological models.

    PubMed

    Curtis, S B

    1986-01-01

    High-energy heavy ions in the galactic cosmic radiation (HZE particles) may pose a special risk during long term manned space flights outside the sheltering confines of the earth's geomagnetic field. These particles are highly ionizing, and they and their nuclear secondaries can penetrate many centimeters of body tissue. The three dimensional patterns of ionizations they create as they lose energy are referred to as their track structure. Several models of biological action on mammalian cells attempt to treat track structure or related quantities in their formulation. The methods by which they do this are reviewed. The proximity function is introduced in connection with the theory of Dual Radiation Action (DRA). The ion-gamma kill (IGK) model introduces the radial energy-density distribution, which is a smooth function characterizing both the magnitude and extension of a charged particle track. The lethal, potentially lethal (LPL) model introduces lambda, the mean distance between relevant ion clusters or biochemical species along the track. Since very localized energy depositions (within approximately 10 nm) are emphasized, the proximity function as defined in the DRA model is not of utility in characterizing track structure in the LPL formulation. PMID:11537218

  6. Visual tracking without feedback control

    NASA Astrophysics Data System (ADS)

    Taalebinezhaad, M. Ali; Poussart, Denis

    1993-08-01

    A typical robot vision scenario might involve a vehicle moving with an unknown 3D motion (translation and rotation) while taking intensity images of an arbitrary environment. This paper describes the theory and implementation issues of constructing a sequence of tracked images in which a desired point in the environment is tracked using an image sequence with arbitrary motion. This method is performed fully in software without any need to mechanically move the camera relative to the vehicle. This tracking technique is simple and inexpensive. Furthermore, it does not use either optical flow or feature correspondence. Instead, the spatio- temporal gradients of the input intensity images are used directly. We have also introduced the gradient maps as an intuitive way of visually representing spatio-temporal brightness gradients. We used such gradient maps to qualitatively examine the quality of our constructed image sequence. The experimental results presented support the idea of tracking in software. The final result is a sequence of tracked images where the desired point is kept stationary in the images independent of the nature of the relative motion that occurred.

  7. Storm tracks near marginal stability

    NASA Astrophysics Data System (ADS)

    Ambaum, Maarten; Novak, Lenka

    2015-04-01

    The variance of atmospheric storm tracks is characterised by intermittent bursts of activity interspersed with relatively quiescent periods. Most of the poleward heat transport by storm tracks is due to a limited number of strong heat flux events, which occur in a quasi-periodic fashion. This behaviour is in contradiction with the usual conceptual model of the storm tracks, which relies on high growth rate background flows which then spawn weather systems that grow in an exponential or non-normal fashion. Here we present a different conceptual model of the atmospheric storm tracks which is built on the observation that, when including diabatic and other dissipative effects, the storm track region is in fact most of the time marginally stable. The ensuing model is a nonlinear oscillator, very similar to Volterra-Lotka predator-prey models. We demonstrate the extensions of this model to a stochastically driven nonlinear oscillator. The model produces quasi-periodic behaviour dominated by intermittent heat flux events. Perhaps most surprisingly, we will show strong evidence from re-analysis data for our conceptual model: the re-analysis data produces a phase-space plot that is very similar indeed to the phase-space plot for our nonlinear oscillator model.

  8. European Central Bank

    NSDL National Science Digital Library

    Together with the national central banks of the European Union, the European Central Bank (ECB) collects statistical information and governs the European System of Central Banks (ESCB). Legal texts about the ECB, the ESCB, and the European Monetary Union (EMI) are provided in addition to press releases, speeches, euro area statistics and selected publications of the EMI (in eleven European languages).

  9. Towards Understanding the Storm Track Response to Anthropogenic Forcing

    NASA Astrophysics Data System (ADS)

    Thompson, D. W.; Butler, A. K.; Birner, T.

    2011-12-01

    The storm track response to anthropogenic forcing is investigated in the context of 1) the effects of increasing CO2 and ozone depletion on the isentropic slope at middle and high latitudes; and 2) the influence of the isentropic slope on the generation of eddy activity in the extratropical troposphere. Observational analyses and numerical experiments reveal that variations in the isentropic slope give rise to changes in both the generation of wave activity near the surface and the eddy fluxes of momentum at the tropopause. Thus the projection of anthropogenic forcing onto the isentropic slope appears to play a central role in determining the response of the storm track and its attendant surface eastward flow to climate change. Implications for tropical/extratropical interaction and stratosphere/troposphere coupling are discussed.

  10. Improvement in track-to-track association from using an adaptive threshold

    Microsoft Academic Search

    Lawrence D. Stone; Thy M. Tran; M. L. Williams

    2009-01-01

    This paper considers the performance of two track-to-track association algorithms. The first bases association decisions on a chi-squared distance between tracks and a fixed significance threshold to determine when no association is allowed. The second algorithm finds the maximum a posteriori probability (MAP) set of associations between tracks from two independent tracking systems. For tracks whose state estimates are characterized

  11. The North Pole Environmental Observatory: A Community Resource for Tracking Change in the Arctic Marine Environment

    Microsoft Academic Search

    J. Morison; K. Aagaard; K. Falkner; T. Kikuchi; M. McPhee; D. Moritz; J. Overland; T. Stanton; M. Steele

    2004-01-01

    The North Pole Environmental Observatory (NPEO) was first established in 2000 as means of long-term tracking of change in the central Arctic Basin. The multiple investigators of NPEO intend the site to provide information and field research opportunities to a broad range of investigators. It is not limited to a single location, but is a distributed observatory consisting of three

  12. 6. 'Tunnel No. 6, Concrete Lining,' Southern Pacific Standard SingleTrack ...

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

    6. 'Tunnel No. 6, Concrete Lining,' Southern Pacific Standard Single-Track Tunnel, ca. 1909. Compare to photos in documentation set for Tunnel 27 (HAER No. CA-203). - Central Pacific Transcontinental Railroad, Sacramento to Nevada state line, Sacramento, Sacramento County, CA

  13. Location Tracking in a Wireless Sensor Network by Mobile Agents and Its Data Fusion Strategies

    Microsoft Academic Search

    Yu-chee Tseng; Sheng-po Kuo; Hung-wei Lee; Chi-fu Huang

    2004-01-01

    The wireless sensor network is an emerging technology that may greatly aid humans by providing ubiquitous sensing, computing and communication capabilities, through which people can more closely interact with the environment wherever they go. To be context-aware, one of the central issues in sensor networks is location tracking, whose goal is to monitor the roaming path of a moving object.

  14. Location Tracking in a Wireless Sensor Network by Mobile Agents and Its Data Fusion Strategies

    Microsoft Academic Search

    Yu-chee Tseng; Sheng-po Kuo; Hung-wei Lee; Chi-fu Huang

    2003-01-01

    The wireless sensor network is an emerging technology that may greatly facilitate human life by providing ubiquitous sensing, computing, and communi- cation capability, through which people can more closely interact with the envi- ronment wherever he\\/she goes. To be context-aware, one of the central issues in sensor networks is location tracking, whose goal is to monitor the roaming path of

  15. Three-dimensional tracking solar energy concentrator and method for making same

    NASA Technical Reports Server (NTRS)

    Miller, C. G.; Pohl, J. G. (inventors)

    1977-01-01

    A three dimensional tracking solar energy concentrator, consisting of a stretched aluminized polymeric membrane supported by a hoop, was presented. The system is sturdy enough to withstand expected windage forces and precipitation. It can provide the high temperature output needed by central station power plants for power production in the multi-megawatt range.

  16. Multi-sensor management for data fusion in target tracking

    NASA Astrophysics Data System (ADS)

    Li, Xiaokun; Chen, Genshe; Blasch, Erik; Patrick, Jim; Yang, Chun; Kadar, Ivan

    2009-05-01

    Multi-sensor management for data fusion in target tracking concerns issues of sensor assignment and scheduling by managing or coordinating the use of multiple sensor resources. Since a centralized sensor management technique has a crucial limitation in that the failure of the central node would cause whole system failure, a decentralized sensor management (DSM) scheme is increasingly important in modern multi-sensor systems. DSM is afforded in modern systems through increased bandwidth, wireless communication, and enhanced power. However, protocols for system control are needed to management device access. As game theory offers learning models for distributed allocations of surveillance resources and provides mechanisms to handle the uncertainty of surveillance area, we propose an agent-based negotiable game theoretic approach for decentralized sensor management (ANGADS). With the decentralized sensor management scheme, sensor assignment occurs locally, and there is no central node and thus reduces the risk of whole-system failure. Simulation results for a multi-sensor target-tracking scenario demonstrate the applicability of the proposed approach.

  17. Tracking moving magnetic features in the photosphere

    NASA Astrophysics Data System (ADS)

    Li, Xiaobo; Büchner, Jörg; Zhang, Hongqi

    2009-11-01

    This research aims for an objective identification, tracking, and a statistical analysis of the Moving Magnetic Features (MMFs) around sunspots using SOHO/MDI high-resolution magnetograms. To this end, we develop a computerized tracking program and study the motion and magnetism of the outflows of MMFs around 26 sunspots. Our method locates 4-27 MMFs per hour, with higher counts for large sunspots. We differentiate MMFs into type ? that have a polarity opposite to the parent sunspots, and type ? that share the sunspot’s polarity. These sunspots’ MMF subsets exhibit a wide range of central tendencies which have distinctive correlations with the sunspots. In general, ?-MMFs emerge farther from the sunspot, carry less flux, and move faster than ?-MMFs. The typical ?/ ?-MMFs emerge at 2.2-8.1/0.1-3.2 Mm outside the penumbra limb, with lifetimes of 1.1-3.1/1.3-2.0 h. They are 1.1-6.6/1.4-3.6 Mm2 in area and carry 1.4-12.5/4.8-11.4 ×1018 Mx of flux. They travel a distance of 2.7-5.9/2.8-3.6 Mm with the speed of 0.5-0.9/0.4-0.7 km/s. Compared to the ?-MMFs produced by large sunspots, those of small spots are smaller. They emerge closer to sunspot, move farther, live longer, and carry less flux. ?-MMFs show much less correlation with the sunspots. The flux outflow carried by the MMFs ranges from 0.2 to 8.3 × 1019Mx· h-1 and does not show obvious correlation with the sunspots’ evolution. The frequency distributions of the MMFs’ distance traveled, area, and flux are exponential. This suggests the existence of numerous small, weak, and short-timescale magnetic objects which might contribute to the sunspot flux outflow.

  18. Tracking and Reconstructing the Interdecadal Pacific Oscillation

    NASA Astrophysics Data System (ADS)

    Henley, Benjamin; Gergis, Joelle; Karoly, David

    2015-04-01

    A new index is developed for the Interdecadal Pacific Oscillation, termed the IPO Tripole Index (TPI). The IPO is associated with a distinct 'tripole' pattern of sea surface temperature anomalies (SSTA), with three large centres of action and variations on decadal timescales, evident in the second principal component (PC) of low-pass filtered global SST. The new index is based on the difference between the SSTA averaged over the central equatorial Pacific and the average of the SSTA in the Northwest and Southwest Pacific. The TPI is an easily calculated, non-PC based index for tracking decadal SST variability associated with the IPO. The TPI time series bears a close resemblance to previously published PC-based indices and has the advantages of being simpler to compute and more consistent with methods used to track the El Niño-Southern Oscillation (ENSO), such as the Niño 3.4 and Trans Niño Indices. The TPI also provides a simple metric, with physical units of °C, for evaluating decadal and interdecadal variability of SST fields in a straightforward manner, and can be used to evaluate the skill of dynamical decadal prediction systems. Composites of SST and mean sea level pressure anomalies reveal that the IPO has maintained a broadly stable structure across the seven most recent positive and negative epochs that occurred during 1870-2013. The TPI is shown to be a robust and stable representation of the IPO phenomenon in instrumental records, with relatively more variance in decadal than shorter timescales compared to Niño 3.4, due to the explicit inclusion of off-equatorial SST variability associated with the IPO. This presentation will also report on progress towards developing a new multi-proxy reconstruction of the IPO over the last several centuries, along with an assessment of the TPI in climate models.

  19. Aircraft recognition and tracking device

    NASA Astrophysics Data System (ADS)

    Filis, Dimitrios P.; Renios, Christos I.

    2011-11-01

    The technology of aircraft recognition and tracking has various applications in all areas of air navigation, be they civil or military, spanning from air traffic control and regulation at civilian airports to anti-aircraft weapon handling and guidance for military purposes.1, 18 The system presented in this thesis is an alternative implementation of identifying and tracking flying objects, which benefits from the optical spectrum by using an optical camera built into a servo motor (pan-tilt unit). More specifically, through the purpose-developed software, when a target (aircraft) enters the field of view of the camera18, it is both detected and identified.5, 22 Then the servo motor, being provided with data on target position and velocity, tracks the aircraft while it is in constant communication with the camera (Fig. 1). All the features are so designed as to operate under real time conditions.

  20. Fuzzy logic particle tracking velocimetry

    NASA Technical Reports Server (NTRS)

    Wernet, Mark P.

    1993-01-01

    Fuzzy logic has proven to be a simple and robust method for process control. Instead of requiring a complex model of the system, a user defined rule base is used to control the process. In this paper the principles of fuzzy logic control are applied to Particle Tracking Velocimetry (PTV). Two frames of digitally recorded, single exposure particle imagery are used as input. The fuzzy processor uses the local particle displacement information to determine the correct particle tracks. Fuzzy PTV is an improvement over traditional PTV techniques which typically require a sequence (greater than 2) of image frames for accurately tracking particles. The fuzzy processor executes in software on a PC without the use of specialized array or fuzzy logic processors. A pair of sample input images with roughly 300 particle images each, results in more than 200 velocity vectors in under 8 seconds of processing time.

  1. AHF Booster Tracking with SIMPSONS.

    SciTech Connect

    Johnson, D. E. (David E.); Neri, F. (Filippo)

    2002-01-01

    The booster lattice for the Advanced Hydrotest Facility at Los Alamos was tracked in 3-D with the program SIMPSONS, using the full, symplectic lattice from TEAPOT, using the full set of magnet and misalignment errors, as well as full space-charge effects. The only corrections included were a rough closed-orbit correction and chromaticity correction. The lattice was tracked for an entire booster cycle, from multi-turn injection through acceleration to the top energy of 4 GeV, approximately 99,000 turns. An initial injection intensity of 4x1Ol2, injected in 25 turns, resulted in a final intensity of 3 . 2 {approx} 1 0a' {approx}t 4 GeV. Results of the tracking, including emittance growth, particle loss, and particle tune distributions are presented.

  2. Robotic vehicle with multiple tracked mobility platforms

    DOEpatents

    Salton, Jonathan R. (Albuquerque, NM); Buttz, James H. (Albuquerque, NM); Garretson, Justin (Albuquerque, NM); Hayward, David R. (Wetmore, CO); Hobart, Clinton G. (Albuquerque, NM); Deuel, Jr., Jamieson K. (Albuquerque, NM)

    2012-07-24

    A robotic vehicle having two or more tracked mobility platforms that are mechanically linked together with a two-dimensional coupling, thereby forming a composite vehicle of increased mobility. The robotic vehicle is operative in hazardous environments and can be capable of semi-submersible operation. The robotic vehicle is capable of remote controlled operation via radio frequency and/or fiber optic communication link to a remote operator control unit. The tracks have a plurality of track-edge scallop cut-outs that allow the tracks to easily grab onto and roll across railroad tracks, especially when crossing the railroad tracks at an oblique angle.

  3. USA Track & Field Coaching Manual. USA Track & Field.

    ERIC Educational Resources Information Center

    USA Track and Field, Inc., Indianapolis, IN.

    This book presents comprehensive, ready-to-apply information from 33 world-class coaches and experts about major track and field events for high school and college coaches. The volume features proven predictive testing procedures; detailed event-specific technique instruction; carefully crafted training programs; and preparation and performance…

  4. Introduction to the programming languages track (track introduction)

    Microsoft Academic Search

    Chang-Hyun Jo

    2000-01-01

    For the SAC of the year of 2000, in the Programming Languages Track, papers were called in the various topics related to programming languages such as Automatic Parallelization, Specification Languages, Automatic Programming, Compiling Techniques, CORBA, Distributed Object Computing, Formal Semantics, Functional Programming, Logic Programming, Mobile Computing, Object-Oriented Programming Languages for Software Specification, Design and Modeling, Meta and Higher-order Programming, Database

  5. Tracking errors in 2D multiple particle tracking microrheology

    NASA Astrophysics Data System (ADS)

    Kowalczyk, Anne; Oelschlaeger, Claude; Willenbacher, Norbert

    2015-01-01

    Tracking errors due to particles moving in and out of the focal plane are a fundamental problem of multiple particle tracking microrheology. Here, we present a new approach to treat these errors so that a statistically significant number of particle trajectories with reasonable length are received, which is important for an unbiased analysis of multiple particle tracking data from inhomogeneous fluids. Starting from Crocker and Grier’s tracking algorithm, we identify particle displacements between subsequent images as artificial jumps; if this displacement deviates more than four standard deviations from the mean value, trajectories are terminated at such positions. In a further processing step, trajectories separated by a time gap ? {?\\text{max}} are merged based on an adaptive search radius criterion accounting for individual particle mobility. For a series of Newtonian fluids covering the viscosity range 6–1300?mPa s, this approach yields the correct viscosity but also results in a viscosity-independent number of trajectories equal to the average number of particles in an image with a minimum length covering at least two orders of magnitude in time. This allows for an unbiased characterization of heterogeneous fluids. For a Carbopol ETD 2050 solution we recover the expected broad variation of particle mobility. Consistent with the widely accepted structural model of highly swollen microgel particles suspended in a polymer solution, we find about 2/3 of the tracers are elastically trapped.

  6. Phase transitions and postural deviations during bimanual kinesthetic tracking.

    PubMed

    Stinear, J W; Byblow, W D

    2001-04-01

    Upper limb coordination was studied by examining pattern stability of between-hand rhythmical coordination. In the first of two experiments, relative phase of rhythmical wrist flexion-extension was examined within a kinesthetic tracking paradigm. Eight right-handed subjects actively tracked a driven hand being flexed and extended by a computer-controlled AC servo-motor. Hand movements were constrained in flexion or extension. The simultaneous contraction of wrist flexors and extensors was defined as inphase (IP) and the alternating contraction of wrist flexors and extensors as antiphase (AP). Phase transitions (from AP to IP) were observed in 16% of trials prepared in AP. Fewer phase transitions occurred when the right wrist was constrained in flexion, and also when the left wrist was constrained in extension. IP patterns were performed with greater stability than AP patterns. These effects were explored further in a second experiment with the addition of a secondary probe reaction time task to assess demands on central capacity, and the analysis of wrist flexor and extensor electromyographic activity. Subjects returned longer reaction times for AP than IP movement, suggesting the AP movement pattern placed a greater demand on central capacity than the IP movement pattern. During this kinesthetic tracking task, similar dynamic principles emerged as those observed during bilaterally active bimanual rhythmical coordination. The greater stability of the hand-posture combination where the driven left hand was constrained in extension and the active right hand was constrained in flexion may be a demonstration of unique central control of coupled activity. PMID:11355391

  7. Analysis of Tropical Cyclone Tracks in the North Indian Ocean

    NASA Astrophysics Data System (ADS)

    Patwardhan, A.; Paliwal, M.; Mohapatra, M.

    2011-12-01

    Cyclones are regarded as one of the most dangerous meteorological phenomena of the tropical region. The probability of landfall of a tropical cyclone depends on its movement (trajectory). Analysis of trajectories of tropical cyclones could be useful for identifying potentially predictable characteristics. There is long history of analysis of tropical cyclones tracks. A common approach is using different clustering techniques to group the cyclone tracks on the basis of certain characteristics. Various clustering method have been used to study the tropical cyclones in different ocean basins like western North Pacific ocean (Elsner and Liu, 2003; Camargo et al., 2007), North Atlantic Ocean (Elsner, 2003; Gaffney et al. 2007; Nakamura et al., 2009). In this study, tropical cyclone tracks in the North Indian Ocean basin, for the period 1961-2010 have been analyzed and grouped into clusters based on their spatial characteristics. A tropical cyclone trajectory is approximated as an open curve and described by its first two moments. The resulting clusters have different centroid locations and also differently shaped variance ellipses. These track characteristics are then used in the standard clustering algorithms which allow the whole track shape, length, and location to be incorporated into the clustering methodology. The resulting clusters have different genesis locations and trajectory shapes. We have also examined characteristics such as life span, maximum sustained wind speed, landfall, seasonality, many of which are significantly different across the identified clusters. The clustering approach groups cyclones with higher maximum wind speed and longest life span in to one cluster. Another cluster includes short duration cyclonic events that are mostly deep depressions and significant for rainfall over Eastern and Central India. The clustering approach is likely to prove useful for analysis of events of significance with regard to impacts.

  8. Martian Central Pit Craters

    NASA Technical Reports Server (NTRS)

    Hillman, E.; Barlow, N. G.

    2005-01-01

    Impact craters containing central pits are rare on the terrestrial planets but common on icy bodies. Mars is the exception among the terrestrial planets, where central pits are seen on crater floors ( floor pits ) as well as on top of central peaks ( summit pits ). Wood et al. [1] proposed that degassing of subsurface volatiles during crater formation produced central pits. Croft [2] argued instead that central pits might form during the impact of volatile-rich comets. Although central pits are seen in impact craters on icy moons such as Ganymede, they do show some significant differences from their martian counterparts: (a) only floor pits are seen on Ganymede, and (b) central pits begin to occur at crater diameters where the peak ring interior morphology begins to appear in terrestrial planet craters [3]. A study of craters containing central pits was conducted by Barlow and Bradley [4] using Viking imagery. They found that 28% of craters displaying an interior morphology on Mars contain central pits. Diameters of craters containing central pits ranged from 16 to 64 km. Barlow and Bradley noted that summit pit craters tended to be smaller than craters containing floor pits. They also noted a correlation of central pit craters with the proposed rings of large impact basins. They argued that basin ring formation fractured the martian crust and allowed subsurface volatiles to concentrate in these locations. They favored the model that degassing of the substrate during crater formation was responsible for central pit formation due to the preferential location of central pit craters along these basin rings.

  9. 4. APATITE FISSION TRACK ANALYSIS OF SITES 959 AND 960 ON THE TRANSFORM CONTINENTAL MARGIN OF GHANA, WEST AFRICA 1

    Microsoft Academic Search

    Peter D. Clift; Andrew Carter; Anthony J. Hurford

    Four samples of sandstone from deformed Aptian-Albian sediments and their less deformed Turonian cover at Sites 959 and 960 on the Côte d'Ivoire-Ghana Marginal Ridge yielded sufficient apatite for fission track analysis. Reduced mean track length values of 12.42 ± 0.16 µm to 13.67 ± 0.11 µm indicate that measured central ages, which range from 88 ± 4 Ma to

  10. Effect of finger tracking combined with electrical stimulation on brain reorganization and hand function in subjects with stroke

    Microsoft Academic Search

    Ela Bhatt; Ashima Nagpal; Kristine H. Greer; Tiffany K. Grunewald; Jennifer L. Steele; Jeff W. Wiemiller; Scott M. Lewis; James R. Carey

    2007-01-01

    Synergism of rehabilitative interventions could maximize recovery following stroke. We examined whether the combination of\\u000a peripherally initiated electrical stimulation of finger extensors and centrally operating finger tracking training could accentuate\\u000a brain reorganization and its relationship to recovery, beyond the effects of either treatment alone. Twenty subjects with\\u000a stroke were randomly assigned to an electrical stimulation (ES), tracking training (TR) or

  11. Telemetry, Tracking and Command System

    Microsoft Academic Search

    D. V. Ramana; K. Shamanna; R. Seshaiah; K. N. Shetty; S. Pal

    1983-01-01

    The Telemetry, Tracking and Command (TTC) system of the Ariane Passenger Payload Experiment (APPLE) geosynchronous satellite provides, in addition to ranging data needed for orbit determination, the up-link for spacecraft command and control and the down-link for system and attitude monitoring. The APPLE base band telecommand and telemetry subsystems use digital modulation and coding techniques. The TTC system primarily operates

  12. Experience with alpha track detectors

    Microsoft Academic Search

    R. A. Oswald; R. V. Wheeler; C. Yoder

    1988-01-01

    The heightened awareness of radon hazards have resulted in an increase in the use of alpha track detectors. Field and laboratory tests have been conducted over sufficiently long periods of time by enough different laboratories so that characteristics of these detectors are better understood. The paper compares common experiences of Terradex Radtrak and Type SF detectors. Both detectors employ the

  13. ATLAS FTK: Fast Track Trigger

    E-print Network

    Volpi, Guido; The ATLAS collaboration

    2015-01-01

    An overview of the ATLAS Fast Tracker processor is presented, reporting the design of the system, its expected performance, and the integration status. The next LHC runs, with a significant increase in instantaneous luminosity, will provide a big challenge to the trigger and data acquisition systems of all the experiments. An intensive use of the tracking information at the trigger level will be important to keep high efficiency in interesting events, despite the increase in multiple p-p collisions per bunch crossing (pile-up). In order to increase the use of tracks within the High Level Trigger (HLT), the ATLAS experiment planned the installation of an hardware processor dedicated to tracking: the Fast TracKer (FTK) processor. The FTK is designed to perform full scan track reconstruction at every Level-1 accept. To achieve this goal, the FTK uses a fully parallel architecture, with algorithms designed to exploit the computing power of custom VLSI chips, the Associative Memory, as well as modern FPGAs. The FT...

  14. Haptic Tracking Permits Bimanual Independence

    ERIC Educational Resources Information Center

    Rosenbaum, David A.; Dawson, Amanda A.; Challis, John H.

    2006-01-01

    This study shows that in a novel task--bimanual haptic tracking--neurologically normal human adults can move their 2 hands independently for extended periods of time with little or no training. Participants lightly touched buttons whose positions were moved either quasi-randomly in the horizontal plane by 1 or 2 human drivers (Experiment 1), in…

  15. Tracking Success in Youth Employment.

    ERIC Educational Resources Information Center

    Rieder, Corinne H.

    1979-01-01

    Youthwork, Incorporated, was created by the Youth Employment and Demonstration Projects Act of 1977 (YEDPA) to keep track of youth employment and training programs. Privately-owned Youthwork administers federal demonstration grants across the country to help provide job guidance, work experience credit, private sector involvement, and…

  16. Rice Boulevard Track/Soccer

    E-print Network

    Mellor-Crummey, John

    Rice Boulevard Track/Soccer Stadium Reckling Park Founder's Court Sunset Boulevard Main Street University Boulevard Entrance 1 Entrance 2 Entrance 8 Entrance 20Entrance 18 Rice Stadium Vistor Parking Vistor Parking Vistor Parking L L L L L L L L L L L L L L L L L L L L L L Rice University Centennial

  17. A Static Capability Tracking System

    Microsoft Academic Search

    Scott F. Smith; Mark Thober

    Capabilities may be used within programming languages to dene and enforce security policies: a user must hold a reference to an object or method to be able to use its features. We dene a system for statically tracking capability ow via types. This work is related to Bokowski and Vitek's Conned Types, and Skalka and Smith's pop system. These previous

  18. An interferometer tracking radar system

    NASA Technical Reports Server (NTRS)

    Broderick, R. F.

    1969-01-01

    Fine tuning acquisition and tracking interferometer radar system uses a first antenna array of at least three receiving antennas. Array includes a reference antenna, a coarse tuning antenna, and a fine tuning antenna aligned on a receiving axis. Short range rendezvous system provides increased position accuracy.

  19. Program Tracks Cost Of Travel

    NASA Technical Reports Server (NTRS)

    Mauldin, Lemuel E., III

    1993-01-01

    Travel Forecaster is menu-driven, easy-to-use computer program that plans, forecasts cost, and tracks actual vs. planned cost of business-related travel of division or branch of organization and compiles information into data base to aid travel planner. Ability of program to handle multiple trip entries makes it valuable time-saving device.

  20. Deer Tracks in the City?

    NSDL National Science Digital Library

    Antonia Rodriguez

    2009-10-01

    "Why would a deer print be in the city?" wondered a student. She had noticed the track near a grocery store that morning with her mother. She was familiar with deer and had noticed their prints on a trip to a local museum; however, she had never seen a de

  1. RFID for personal asset tracking

    Microsoft Academic Search

    S. Chan; A. Connell; R. Kamoua

    2009-01-01

    The proposed mobile device uses radio frequency identification (RFID) to keep track of registered objects that are within range of the user. The goal is to provide a new security solution for keeping belongings that are carried around. The device consists of a mobile RFID reader and a control program with a graphical user interface. The assets are attached with

  2. IIT TREC 2006: Genomics Track

    Microsoft Academic Search

    Jay Urbain; Nazli Goharian; Ophir Frieder

    2006-01-01

    For the TREC-2006 Genomics Track, we report on the effectiveness of composite information retrieval functions based on a dimensional data model for improving document, passage, and aspect search precision of genomics literature. We designed an approach, and developed a corresponding search engine, based on a novel dimensional data model capable of document, paragraph, sentence, and passage level retrieval of genomics

  3. Drizzle Suppression in Ship Tracks

    Microsoft Academic Search

    Ronald J. Ferek; Timothy Garrett; Peter V. Hobbs; Scott Strader; Doug Johnson; Jonathan P. Taylor; Kurt Nielsen; Andrew S. Ackerman; Yefim Kogan; Qingfu Liu; Bruce A. Albrecht; David Babb

    2000-01-01

    Although drizzle was a relatively infrequent occurrence during the Monterey Area Ship Track study, diverse measurements from several sources produced data signals consistent with a reduction in drizzle drops in stratus clouds affected by ship effluents. Concurrent increases in liquid water in the cloud droplet size range, due to redistribution from the drizzle mode, were not always observed, possibly because

  4. 3D Tracking = Classification + Interpolation

    Microsoft Academic Search

    Carlo Tomasi; Slav Petrov; Arvind Sastry

    2003-01-01

    Hand gestures are examples of fast and complex motions. Computers fail to track these in fast video, but sleight of hand fools humans as well: what happens too quickly we just cannot see. We show a 3D tracker for these types of motions that relies on the recognition of familiar config- urations in 2D images (classification), and fills the gaps

  5. AGATA - Advanced Gamma Tracking Array

    E-print Network

    S. Akkoyun; A. Algora; B. Alikhani; F. Ameil; G. de Angelis; L. Arnold; A. Astier; A. Ataç; Y. Aubert; C. Aufranc; A. Austin; S. Aydin; F. Azaiez; S. Badoer; D. L. Balabanski; D. Barrientos; G. Baulieu; R. Baumann; D. Bazzacco; F. A. Beck; T. Beck; P. Bednarczyk; M. Bellato; M. A. Bentley; G. Benzoni; R. Berthier; L. Berti; R. Beunard; G. Lo Bianco; B. Birkenbach; P. G. Bizzeti; A. M. Bizzeti-Sona; F. Le Blanc; J. M. Blasco; N. Blasi; D. Bloor; C. Boiano; M. Borsato; D. Bortolato; A. J. Boston; H. C. Boston; P. Bourgault; P. Boutachkov; A. Bouty; A. Bracco; S. Brambilla; I. P. Brawn; A. Brondi; S. Broussard; B. Bruyneel; D. Bucurescu; I. Burrows; A. Bürger; S. Cabaret; B. Cahan; E. Calore; F. Camera; A. Capsoni; F. Carrió; G. Casati; M. Castoldi; B. Cederwall; J. -L. Cercus; V. Chambert; M. El Chambit; R. Chapman; L. Charles; J. Chavas; E. Clément; P. Cocconi; S. Coelli; P. J. Coleman-Smith; A. Colombo; S. Colosimo; C. Commeaux; D. Conventi; R. J. Cooper; A. Corsi; A. Cortesi; L. Costa; F. C. L. Crespi; J. R. Cresswell; D. M. Cullen; D. Curien; A. Czermak; D. Delbourg; R. Depalo; T. Descombes; P. Désesquelles; P. Detistov; C. Diarra; F. Didierjean; M. R. Dimmock; Q. T. Doan; C. Domingo-Pardo; M. Doncel; F. Dorangeville; N. Dosme; Y. Drouen; G. Duchêne; B. Dulny; J. Eberth; P. Edelbruck; J. Egea; T. Engert; M. N. Erduran; S. Ertürk; C. Fanin; S. Fantinel; E. Farnea; T. Faul; M. Filliger; F. Filmer; Ch. Finck; G. de France; A. Gadea; W. Gast; A. Geraci; J. Gerl; R. Gernhäuser; A. Giannatiempo; A. Giaz; L. Gibelin; A. Givechev; N. Goel; V. González; A. Gottardo; X. Grave; J. Gr?bosz; R. Griffiths; A. N. Grint; P. Gros; L. Guevara; M. Gulmini; A. Görgen; H. T. M. Ha; T. Habermann; L. J. Harkness; H. Harroch; K. Hauschild; C. He; A. Hernández-Prieto; B. Hervieu; H. Hess; T. Hüyük; E. Ince; R. Isocrate; G. Jaworski; A. Johnson; J. Jolie; P. Jones; B. Jonson; P. Joshi; D. S. Judson; A. Jungclaus; M. Kaci; N. Karkour; M. Karolak; A. Ka?ka?; M. Kebbiri; R. S. Kempley; A. Khaplanov; S. Klupp; M. Kogimtzis; I. Kojouharov; A. Korichi; W. Korten; Th. Kröll; R. Krücken; N. Kurz; B. Y. Ky; M. Labiche; X. Lafay; L. Lavergne; I. H. Lazarus; S. Leboutelier; F. Lefebvre; E. Legay; L. Legeard; F. Lelli; S. M. Lenzi; S. Leoni; A. Lermitage; D. Lersch; J. Leske; S. C. Letts; S. Lhenoret; R. M. Lieder; D. Linget; J. Ljungvall; A. Lopez-Martens; A. Lotodé; S. Lunardi; A. Maj; J. van der Marel; Y. Mariette; N. Marginean; R. Marginean; G. Maron; A. R. Mather; W. M?czy?ski; V. Mendéz; P. Medina; B. Melon; R. Menegazzo; D. Mengoni; E. Merchan; L. Mihailescu; C. Michelagnoli; J. Mierzejewski; L. Milechina; B. Million; K. Mitev; P. Molini; D. Montanari; S. Moon; F. Morbiducci; R. Moro; P. S. Morrall; O. Möller; A. Nannini; D. R. Napoli; L. Nelson; M. Nespolo; V. L. Ngo; M. Nicoletto; R. Nicolini; Y. Le Noa; P. J. Nolan; M. Norman; J. Nyberg; A. Obertelli; A. Olariu; R. Orlandi; D. C. Oxley; C. Özben; M. Ozille; C. Oziol; E. Pachoud; M. Palacz; J. Palin; J. Pancin; C. Parisel; P. Pariset; G. Pascovici; R. Peghin; L. Pellegri; A. Perego; S. Perrier; M. Petcu; P. Petkov; C. Petrache; E. Pierre; N. Pietralla; S. Pietri; M. Pignanelli; I. Piqueras; Z. Podolyak; P. Le Pouhalec; J. Pouthas; D. Pugnére; V. F. E. Pucknell; A. Pullia; B. Quintana; R. Raine; G. Rainovski; L. Ramina; G. Rampazzo; G. La Rana; M. Rebeschini; F. Recchia; N. Redon; M. Reese; P. Reiter; P. H. Regan; S. Riboldi; M. Richer; M. Rigato; S. Rigby; G. Ripamonti; A. P. Robinson; J. Robin; J. Roccaz; J. -A. Ropert; B. Rossé; C. Rossi Alvarez; D. Rosso; B. Rubio; D. Rudolph; F. Saillant; E. ?ahin; F. Salomon; M. -D. Salsac; J. Salt; G. Salvato; J. Sampson; E. Sanchis; C. Santos; H. Schaffner; M. Schlarb; D. P. Scraggs; D. Seddon; M. ?enyi?it; M. -H. Sigward; G. Simpson; J. Simpson; M. Slee; J. F. Smith; P. Sona; B. Sowicki; P. Spolaore; C. Stahl; T. Stanios; E. Stefanova; O. Stézowski; J. Strachan; G. Suliman; P. -A. Söderström; J. L. Tain; S. Tanguy; S. Tashenov; Ch. Theisen; J. Thornhill; F. Tomasi; N. Toniolo; R. Touzery; B. Travers; A. Triossi; M. Tripon; K. M. M. Tun-Lanoë; M. Turcato; C. Unsworth; C. A. Ur; J. J. Valiente-Dobon; V. Vandone; E. Vardaci; R. Venturelli; F. Veronese; Ch. Veyssiere; E. Viscione; R. Wadsworth; P. M. Walker; N. Warr; C. Weber; D. Weisshaar; D. Wells; O. Wieland; A. Wiens; G. Wittwer; H. J. Wollersheim; F. Zocca; N. V. Zamfir; M. Zi?bli?ski; A. Zucchiatti

    2012-09-17

    The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation gamma-ray spectrometer. AGATA is based on the technique of gamma-ray energy tracking in electrically segmented high-purity germanium crystals. This technique requires the accurate determination of the energy, time and position of every interaction as a gamma ray deposits its energy within the detector volume. Reconstruction of the full interaction path results in a detector with very high efficiency and excellent spectral response. The realization of gamma-ray tracking and AGATA is a result of many technical advances. These include the development of encapsulated highly-segmented germanium detectors assembled in a triple cluster detector cryostat, an electronics system with fast digital sampling and a data acquisition system to process the data at a high rate. The full characterization of the crystals was measured and compared with detector-response simulations. This enabled pulse-shape analysis algorithms, to extract energy, time and position, to be employed. In addition, tracking algorithms for event reconstruction were developed. The first phase of AGATA is now complete and operational in its first physics campaign. In the future AGATA will be moved between laboratories in Europe and operated in a series of campaigns to take advantage of the different beams and facilities available to maximize its science output. The paper reviews all the achievements made in the AGATA project including all the necessary infrastructure to operate and support the spectrometer.

  6. Multiple vehicle detection and tracking

    Microsoft Academic Search

    Margrit Betke; Esin Haritaoglu; Larry S. Davis

    1997-01-01

    A hard real time vision system has been developed that recognizes and tracks multiple cars from video sequences taken from a car driving on highways and country roads. Recognition is accomplished by combining the analysis of single image frames with the analysis of the motion information provided by multiple consecutive image frames. In single image frames, cars are recognized by

  7. A special Track in Bioinformatics

    E-print Network

    Al-Mubaid, Hisham

    ITNG 2007 A special Track in Bioinformatics Within the 4th International Conference on Information and biomedical computational systems and models, and engineering models in Biomedicine. We invite researchers will be considered for publication in special issues of int'l journals (details in the conf website www

  8. Assistant Professor Tenure Track Position

    E-print Network

    Azevedo, Ricardo

    Assistant Professor Tenure Track Position School of Social Work The Michigan State University School of Social Work in the College of Social Science is seeking applications for an Assistant Professor content areas including gerontology, child welfare, and health/mental health. The research environment

  9. Special track on computer security

    Microsoft Academic Search

    Giampaolo Bella; Peter Y. A. Ryan

    2005-01-01

    The increasing importance of information security to society in the 21st century is widely acknowledged. This is reflected by the growing interest in the Security Track, which is now in its fourth edition. This year's success is in large part due to the efforts of the expanded Program Committee, composed of 18 leading researchers coming from Academia and Industry.

  10. On the TREC Blog Track

    Microsoft Academic Search

    Iadh Ounis; Ian Soboroff

    2008-01-01

    The rise of blogging as a new grassroots publishing medium and the many interesting peculiarities that characterise blogs compared to other genres of documents opened up several new interesting research areas in the information retrieval field. The Blog track was introduced in 2006 as part of the renowned Text REtrieval Conference (TREC) evaluation fo- rum, to drive research on the

  11. SILEX acquisition and tracking sensors

    Microsoft Academic Search

    Robert A. Cockshott; David J. Purll

    1995-01-01

    This paper describes the Acquisition Sensor Detection Unit (ASDU) and the Tracking Sensor Detection Unit (TSDU) developed by Sira Ltd to be flown in the European Space Agency's SILEX (Semi-conductor Inter satellite Link Experiment) terminals. These units were designed, manufactured and qualified by Sira under contract to Matra Marconi Space. Stringent vibration, thermal stability and video waveform noise and timing

  12. Tracking frequency laser distance gauge

    Microsoft Academic Search

    J. D. Phillips; R. D. Reasenberg

    2005-01-01

    Advanced astronomical missions with greatly enhanced resolution and physics missions of unprecedented accuracy will require laser distance gauges of substantially improved performance. We describe a laser gauge, based on Pound-Drever-Hall locking, in which the optical frequency is adjusted to maintain an interferometer's null condition. This technique has been demonstrated with pm performance. Automatic fringe hopping allows it to track arbitrary

  13. Etching fission tracks in zircons

    USGS Publications Warehouse

    Naeser, C.W.

    1969-01-01

    A new technique has been developed whereby fission tracks can be etched in zircon with a solution of sodium hydroxide at 220??C. Etching time varied between 15 minutes and 5 hours. Colored zircon required less etching time than the colorless varieties.

  14. Concrete Pavement Sustainability Sustainability Track Leadership

    E-print Network

    #12;What Else is Happening? · FHWA advocating "Green Paving" technologies ­ Recycled concrete, twoTrack 13: Concrete Pavement Sustainability #12;Sustainability Track Leadership Committee Members: Preservation/Rehabilitation/Recycling Strategies · S.5: Improved Economic Life Cycle Cost Analysis · S.6

  15. Drift chamber tracking with neural networks

    SciTech Connect

    Lindsey, C.S.; Denby, B.; Haggerty, H.

    1992-10-01

    We discuss drift chamber tracking with a commercial log VLSI neural network chip. Voltages proportional to the drift times in a 4-layer drift chamber were presented to the Intel ETANN chip. The network was trained to provide the intercept and slope of straight tracks traversing the chamber. The outputs were recorded and later compared off line to conventional track fits. Two types of network architectures were studied. Applications of neural network tracking to high energy physics detector triggers is discussed.

  16. Boston University Computer Science Technical Report No. BUCSTR2010030 # TrackingReconstruction or ReconstructionTracking?

    E-print Network

    Boston University Computer Science Technical Report No. BUCS­TR­2010­030 # Tracking­Reconstruction or Reconstruction­Tracking? Comparison of Two Multiple Hypothesis Tracking Approaches to Interpret 3D Object Motion University Abstract We developed two methods for tracking multiple ob­ jects using several camera views

  17. TrackCam: 3D-aware Tracking Shots from Consumer Video Shuaicheng Liu1

    E-print Network

    Wang, Jue

    TrackCam: 3D-aware Tracking Shots from Consumer Video Shuaicheng Liu1 Jue Wang2 Sunghyun Cho2 Ping according to both foreground motion and scene structure in 3D. Abstract Panning and tracking shots trajectories). In this work we propose a system to generate realistic, 3D-aware tracking shots from consumer

  18. Multiple hypothesis tracking for the cyber domain

    Microsoft Academic Search

    Stefan Schwoegler; Sam Blackman; Jared Holsopple; Michael J. Hirsch

    2011-01-01

    This paper discusses how methods used for conventional multiple hypothesis tracking (MHT) can be extended to domain-agnostic tracking of entities from non-kinematic constraints such as those imposed by cyber attacks in a potentially dense false alarm background. MHT is widely recognized as the premier method to avoid corrupting tracks with spurious data in the kinematic domain but it has not

  19. MILSTAR reflector antennas with electronic tracking feeds

    Microsoft Academic Search

    J. F. Pedersen; G. A. Schay; G. S. Avallone; P. W. Hannan

    1995-01-01

    Current airborne reflector designs for MILSTAR use mechanical techniques for developing a signal to track a satellite. If ionospheric scintillation is present, then slow mechanical tracking is subject to large errors. These errors are avoidable with monopulse tracking. The benefit of monopulse can be realized, without incurring its cost and complexity, by rapid sequential lobing often referred to as pseudo-monopulse

  20. MILSTAR reflector antennas with electronic tracking feeds

    Microsoft Academic Search

    J. F. Pedersen; G. A. Schay; G. S. Avallone; P. W. Hannan

    1994-01-01

    Current airborne reflector designs for MILSTAR use mechanical techniques for developing a signal to track a satellite. If ionospheric scintillation is present, then slow mechanical tracking is subject to large errors. These errors are avoidable with monopulse tracking. The benefit of monopulse can be realized, without incurring its cost and complexity, by rapid sequential lobing often referred to as pseudo-monopulse

  1. 49 CFR 236.726 - Circuit, track.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...4 2014-10-01 2014-10-01 false Circuit, track. 236.726 Section 236.726 Transportation...AND APPLIANCES Definitions § 236.726 Circuit, track. An electrical circuit of which the rails of the track form a...

  2. 49 CFR 236.726 - Circuit, track.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...4 2013-10-01 2013-10-01 false Circuit, track. 236.726 Section 236.726 Transportation...AND APPLIANCES Definitions § 236.726 Circuit, track. An electrical circuit of which the rails of the track form a...

  3. 49 CFR 236.726 - Circuit, track.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...4 2011-10-01 2011-10-01 false Circuit, track. 236.726 Section 236.726 Transportation...AND APPLIANCES Definitions § 236.726 Circuit, track. An electrical circuit of which the rails of the track form a...

  4. 49 CFR 236.726 - Circuit, track.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...4 2010-10-01 2010-10-01 false Circuit, track. 236.726 Section 236.726 Transportation...AND APPLIANCES Definitions § 236.726 Circuit, track. An electrical circuit of which the rails of the track form a...

  5. 49 CFR 236.726 - Circuit, track.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...4 2012-10-01 2012-10-01 false Circuit, track. 236.726 Section 236.726 Transportation...AND APPLIANCES Definitions § 236.726 Circuit, track. An electrical circuit of which the rails of the track form a...

  6. Approximating Kinematics for Tracked Mobile Robots

    Microsoft Academic Search

    J. L. Martínez; A. Mandow; J. Morales; S. Pedraza; A. García-Cerezo

    2005-01-01

    In this paper we propose a kinematic approach for tracked mobile robots in order to improve motion control and pose estimation. Complex dynamics due to slippage and track–soil interactions make it difficult to predict the exact motion of the vehicle on the basis of track velocities. Nevertheless, real-time computations for autonomous navigation require an effective kinematics approximation without introducing dynamics

  7. Online Selection of Discriminative Tracking Features

    E-print Network

    features used. Surprisingly, most tracking applications are con- ducted using a fixed set of featuresOnline Selection of Discriminative Tracking Features Robert T. Collins, Senior Member, IEEE, Yanxi selection mechanism for evaluating multiple features while tracking and adjusting the set of features used

  8. Tracking Defect Warnings Across Versions Jaime Spacco

    E-print Network

    Hovemeyer, David H.

    static analysis tool to find bugs in Java programs) for tracking defects across versions, discuss work on the FindBugs static analysis tool [5, 3] we have implemented techniques and tools for trackingTracking Defect Warnings Across Versions Jaime Spacco£ , David HovemeyerÝ , William Pugh£ £ Dept

  9. Detection and frequency tracking of chirping signals

    SciTech Connect

    Elliott, G.R.; Stearns, S.D.

    1990-08-01

    This paper discusses several methods to detect the presence of and track the frequency of a chirping signal in broadband noise. The dynamic behavior of each of the methods is described and tracking error bounds are investigated in terms of the chirp rate. Frequency tracking and behavior in the presence of varying levels of noise are illustrated in examples. 11 refs., 29 figs.

  10. Track and Trace Case Studies Report

    Microsoft Academic Search

    Thomas Kelepouris; Tom Baynham; Duncan McFarlane

    2006-01-01

    Report Abstract: As part of the track and trace theme of the Aero-ID programme, a series of case studies are being undertaken to establish the role of identification technologies can play in improving tracking and tracing. This report presents some initial results from two case studies focused on track and trace operations, which took place at a distribution centre for

  11. Making Conductive Polymers By Arc Tracking

    NASA Technical Reports Server (NTRS)

    Daech, Alfred F.

    1992-01-01

    Experimental technique for fabrication of electrically conductive polymeric filaments based on arc tracking, in which electrical arc creates conductive carbon track in material that initially was insulator. Electrically conductive polymeric structures made by arc tracking aligned along wire on which formed. Alignment particularly suited to high conductivity and desirable in materials intended for testing as candidate superconductors.

  12. AMSTE precision fire control tracking overview

    Microsoft Academic Search

    David R. Kirk; T. Grayson; D. Garren; Chee-Yee Chong

    2000-01-01

    The DARPA Affordable Moving Surface Target Engagement (AMSTE) program is a research effort to develop a system concept to track and engage a moving surface target with a single unitary warhead. Engaging a moving surface target requires precision tracking to a degree that has not been demonstrated in previous work. Tracking moving surface targets is especially difficult because of the

  13. CHARACTERISATION OF TRACKING PERFORMANCE Andrea Cavallaro1

    E-print Network

    Cavallaro, Andrea

    , and the monitoring of the technological progress in the field. 1. INTRODUCTION An increasing number of algorithms.ziliani@visiowave.com ABSTRACT The accuracy of tracking algorithms is highly data dependent. However, tracking algorithms. In this paper, we propose a benchmarking protocol to evaluate and compare object tracking algorithms

  14. Statistical Tracking in Video Traffic Surveillance

    Microsoft Academic Search

    Jeffrey E. Boyd; Jean Meloche; Yehuda Vardi

    1999-01-01

    Applications that interpret video data need to track ob- jects as they move in a scene. Tracking methods that es- timate the state trajectories of objects as they change over time (e.g. Kalman filter) have difficulty as the number of ob- jects and clutter increase. We present an alternative, call ed statistical tracking , that is based on the concept

  15. Applied particle filter in traffic tracking

    Microsoft Academic Search

    Le Hoai Bac; Pham Nam Trung; Le Nguyen Tuong Vu

    2006-01-01

    This paper introduces a general traffic tracking system which has the ability to detect and track objects moving in the street automatically. By combining the idea of Particle Filter and background subtraction, we propose ODAPF - Object Detection Aided Particle Filter, a framework of multi-object tracking using Particle Filter, which works under the assist of an object detection process. This

  16. The Improved Particle Filter for Object Tracking

    Microsoft Academic Search

    Qicong Wang; Jilin Liu

    2006-01-01

    We address the problem of object tracking encountered in video processing. The proposed approach is mainly composed of object modeling, the improved particle filter and mixture filtering. First, each of visual objects can be modeled by multi-part color likelihood model. To tackle self-occlusion of the tracked objects, the color distribution representing the tracked object can be updated over time. We

  17. NASDA's current tracking and data acquisition activity

    Microsoft Academic Search

    K. Funakawa; A. Yamamoto

    1981-01-01

    It is pointed out that satellite tracking activities in Japan are mainly conducted by the National Space Development Agency of Japan (NASDA). The NASDA network considered consists of the Tracking and Control Center (TACC), the Katsuura Tracking and Data Acquisition Station (KTDS), the Masuda TDS (MTDS), and the Okinawa TDS (OTDS). All stations are connected to TACC by dedicated communication

  18. Physically Based Tracking of Cloth Nils Hasler

    E-print Network

    Physically Based Tracking of Cloth Nils Hasler , Mark Asbach+ , Bodo Rosenhahn , Jens-Rainer Ohm,ohm}@ient.rwth-aachen.de Abstract In this work a method for tracking fabrics in videos is proposed which, unlike most other cloth of the simu- lated cloth. To improve the tracking accuracy and to overcome the inherently chaotic behaviour

  19. Rutgers Interactive Track at TREC5

    Microsoft Academic Search

    Nicholas J. Belkin; A. Cabezas; Colleen Cool; K. Kim; Kwong Bor Ng; Soyeon Park; R. Pressman; Soo Young Rieh; Pamela A. Savage-knepshield; H. Xie

    1996-01-01

    The Interactive Track investigation at Rutgers concentrated primarily on three factors: the search- ers' uses and understandings of relevance feedback and ranked output, and the utility of relevance feedback for the interactive track task; the searchers' understandings of the interactive track task; and performance differences based on topic characteristics and searcher and order effects. Our of- ficial results are for

  20. Tracking multiple targets with multifocal attention

    E-print Network

    Cavanagh, Patrick

    Tracking multiple targets with multifocal attention Patrick Cavanagh and George A. Alvarez to track four or more targets simultaneously. Although the mechanisms by which attention maintains contact of the tracking process, including properties defining a `trackable' target, the maximum number of targets

  1. Optimal Adaptive Waveform Selection for Target Tracking

    E-print Network

    Rezaeian, Mohammad-Jafar

    Optimal Adaptive Waveform Selection for Target Tracking Barbara La Scala Mohammad Rezaeian Bill algorithms. This paper describes an optimal adaptive waveform selection algorithm for target tracking scheduling for target tracking as a stochastic dy- namic programming problem. The result is a scheduling

  2. obscuration managment for multiple ground target tracking

    E-print Network

    Paris-Sud XI, Université de

    Terrain obscuration managment for multiple ground target tracking Benjamin Pannetier Information Grenoble, France Email: michele.rombaut@lis.inpg.fr Abstract-- Multiple ground targets tracking with a GMTI to track multiple manoeuvring ground targets. However, the case of undetected targets due to terrain

  3. Implementation and experimental results of 4D tumor tracking using robotic couch

    SciTech Connect

    Buzurovic, I.; Yu, Y.; Werner-Wasik, M.; Biswas, T.; Anne, P. R.; Dicker, A. P.; Podder, T. K. [Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107 (United States); Department of Radiation Oncology, University Hospitals Case Medical Center, Cleveland, Ohio 44106 (United States); Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107 (United States); Department of Radiation Oncology, University Hospitals Case Medical Center, Cleveland, Ohio 44106 (United States)

    2012-11-15

    Purpose: This study presents the implementation and experimental results of a novel technique for 4D tumor tracking using a commercially available and commonly used treatment couch and evaluates the tumor tracking accuracy in clinical settings. Methods: Commercially available couch is capable of positioning the patient accurately; however, currently there is no provision for compensating physiological movement using the treatment couch in real-time. In this paper, a real-time couch tracking control technique is presented together with experimental results in tumor motion compensation in four dimensions (superior-inferior, lateral, anterior-posterior, and time). To implement real-time couch motion for tracking, a novel control system for the treatment couch was developed. The primary functional requirements for this novel technique were: (a) the treatment couch should maintain all previous/normal features for patient setup and positioning, (b) the new control system should be used as a parallel system when tumor tracking would be deployed, and (c) tracking could be performed in a single direction and/or concurrently in all three directions of the couch motion (longitudinal, lateral, and vertical). To the authors' best knowledge, the implementation of such technique to a regular treatment couch for tumor tracking has not been reported so far. To evaluate the performance of the tracking couch, we investigated the mechanical characteristics of the system such as system positioning resolution, repeatability, accuracy, and tracking performance. Performance of the tracking system was evaluated using dosimetric test as an endpoint. To investigate the accuracy of real-time tracking in the clinical setting, the existing clinical treatment couch was replaced with our experimental couch and the linear accelerator was used to deliver 3D conformal radiation therapy (3D-CRT) and intensity modulated radiation therapy (IMRT) treatment plans with and without tracking. The results of radiation dose distribution from these two sets of experiments were compared and presented here. Results: The mechanical accuracies were 0.12, 0.14, and 0.18 mm in X, Y, and Z directions. The repeatability of the desired motion was within {+-}0.2 mm. The differences of central axis dose between the 3D-CRT stationary plan and two tracking plans with different motion trajectories were 0.21% and 1.19%. The absolute dose differences of both 3D tracking plans comparing to the stationary plan were 1.09% and 1.20%. Comparing the stationary IMRT plan with the tracking IMRT plan, it was observed that the central axis dose difference was -0.87% and the absolute difference of both IMRT plans was 0.55%. Conclusions: The experimental results revealed that the treatment couch could be successfully used for real-time tumor tracking with a high level of accuracy. It was demonstrated that 4D tumor tracking was feasible using existing couch with implementation of appropriate tracking methodology and with modifications in the control system.

  4. A dynamical systems view of network centrality

    PubMed Central

    Grindrod, Peter; Higham, Desmond J.

    2014-01-01

    To gain insights about dynamic networks, the dominant paradigm is to study discrete snapshots, or timeslices, as the interactions evolve. Here, we develop and test a new mathematical framework where network evolution is handled over continuous time, giving an elegant dynamical systems representation for the important concept of node centrality. The resulting system allows us to track the relative influence of each individual. This new setting is natural in many digital applications, offering both conceptual and computational advantages. The novel differential equations approach is convenient for modelling and analysis of network evolution and gives rise to an interesting application of the matrix logarithm function. From a computational perspective, it avoids the awkward up-front compromises between accuracy, efficiency and redundancy required in the prevalent discrete-time setting. Instead, we can rely on state-of-the-art ODE software, where discretization takes place adaptively in response to the prevailing system dynamics. The new centrality system generalizes the widely used Katz measure, and allows us to identify and track, at any resolution, the most influential nodes in terms of broadcasting and receiving information through time-dependent links. In addition to the classical static network notion of attenuation across edges, the new ODE also allows for attenuation over time, as information becomes stale. This allows ‘running measures’ to be computed, so that networks can be monitored in real time over arbitrarily long intervals. With regard to computational efficiency, we explain why it is cheaper to track good receivers of information than good broadcasters. An important consequence is that the overall broadcast activity in the network can also be monitored efficiently. We use two synthetic examples to validate the relevance of the new measures. We then illustrate the ideas on a large-scale voice call network, where key features are discovered that are not evident from snapshots or aggregates. PMID:24808758

  5. Back on Track

    NASA Astrophysics Data System (ADS)

    2007-06-01

    An artificial, laser-fed star now shines regularly over the sky of Paranal, home of ESO's Very Large Telescope, one of the world's most advanced large ground-based telescopes. This system provides assistance for the adaptive optics instruments on the VLT and so allows astronomers to obtain images free from the blurring effect of the atmosphere, regardless of the brightness and the location on the sky of the observed target. Now that it is routinely offered by the observatory, the skies seem much sharper to astronomers. In order to counteract the blurring effect of Earth's atmosphere, astronomers use the adaptive optics technique. This requires, however, a nearby reference star that has to be relatively bright, thereby limiting the area of the sky that can be surveyed. To surmount this limitation, astronomers now use at Paranal a powerful laser that creates an artificial star, where and when they need it. Two of the Adaptive Optics (AO) science instruments at the Paranal observatory, NACO and SINFONI, have been upgraded to work with the recently installed Laser Guide Star (LGS; see ESO 07/06) and have delivered their first scientific results. This achievement opens astronomers' access to a wealth of new targets to be studied under the sharp eyes of AO. "These unique results underline the advantage of using a Laser Guide Star with Adaptive Optics instruments, since they could not be obtained with Natural Guide Stars," says Norbert Hubin, head of the Adaptive Optics group at ESO. "This is also a crucial milestone towards the multi-laser systems ESO is designing for the VLT and the future E-ELT" (see e.g. ESO 19/07). ESO PR Photo 27a/07 ESO PR Photo 27a/07 An Ultra Luminous Merger (NACO-LGS/VLT) The Laser Guide Star System installed at Paranal uses the PARSEC dye laser developed by MPE-Garching and MPIA-Heidelberg, while the launch telescope and the laser laboratory was developed by ESO. "It is great to see the whole system working so well together," emphasises Richard Davies, project manager of the PARSEC laser. "To test the laser guide star adaptive optics system to its limits, and even beyond, we observed a number of galaxies, ranging from a close neighbour to one that is seen when the universe was very young," explains Markus Kasper, the NACO Instrument Scientist at ESO. The first objects that were observed are interacting galaxies. The images obtained reveal exquisite details, and have a resolution comparable to that of the Hubble Space Telescope. In one case, it was possible to derive for the first time the motion of the stars in two merging galaxies, showing that there are two counter-rotating discs of stars. "The enhanced resolution that laser guide star adaptive optics provides is certain to bring important new discoveries in this exciting area," says Davies ESO PR Photo 27c/07 ESO PR Photo 27c/07 Merging System Arp 220 (SINFONI-LGS/VLT) The astronomers then turned the laser to a galaxy called K20-ID5 which is at a redshift of 2.2 - we are seeing this galaxy when the universe was less than 1/3 of its current age. The image obtained with NACO shows that the stars are concentrated in a much more compact region than the gas. "These observations are both remarkable and exciting," declares Kasper. "They are the first time that it has been possible to trace in such detail the distributions of both the stars and the gas at an epoch where we are witnessing the formation of galaxies similar to our own Milky Way." At the opposite extreme, much nearer to home, LGS-AO observations were made of the active galaxy NGC 4945. The new LGS observations with NACO resolved the central parts into a multitude of individual stars. "It is in galaxies such as these where we can really quantify the star formation history in the vicinity of the nucleus, that we can start to piece together the puzzle of how gas is accreted onto the supermassive black hole, and understand how and when these black holes light up so brightly," says Davies. ESO PR Photo 27e/07 ESO PR Ph

  6. Tracking down hyper-boosted top quarks

    E-print Network

    Andrew J. Larkoski; Fabio Maltoni; Michele Selvaggi

    2015-03-26

    The identification of hadronically decaying heavy states, such as vector bosons, the Higgs, or the top quark, produced with large transverse boosts has been and will continue to be a central focus of the jet physics program at the Large Hadron Collider (LHC). At a future hadron collider working at an order-of-magnitude larger energy than the LHC, these heavy states would be easily produced with transverse boosts of several TeV. At these energies, their decay products will be separated by angular scales comparable to individual calorimeter cells, making the current jet substructure identification techniques for hadronic decay modes not directly employable. In addition, at the high energy and luminosity projected at a future hadron collider, there will be numerous sources for contamination including initial- and final-state radiation, underlying event, or pile-up which must be mitigated. We propose a simple strategy to tag such "hyper-boosted" objects that defines jets with radii that scale inversely proportional to their transverse boost and combines the standard calorimetric information with charged track-based observables. By means of a fast detector simulation, we apply it to top quark identification and demonstrate that our method efficiently discriminates hadronically decaying top quarks from light QCD jets up to transverse boosts of 20 TeV. Our results open the way to tagging heavy objects with energies in the multi-TeV range at present and future hadron colliders.

  7. Tracking down hyper-boosted top quarks

    NASA Astrophysics Data System (ADS)

    Larkoski, Andrew J.; Maltoni, Fabio; Selvaggi, Michele

    2015-06-01

    The identification of hadronically decaying heavy states, such as vector bosons, the Higgs, or the top quark, produced with large transverse boosts has been and will continue to be a central focus of the jet physics program at the Large Hadron Collider (LHC). At a future hadron collider working at an order-of-magnitude larger energy than the LHC, these heavy states would be easily produced with transverse boosts of several TeV. At these energies, their decay products will be separated by angular scales comparable to individual calorimeter cells, making the current jet substructure identification techniques for hadronic decay modes not directly employable. In addition, at the high energy and luminosity projected at a future hadron collider, there will be numerous sources for contamination including initial- and final-state radiation, underlying event, or pile-up which must be mitigated. We propose a simple strategy to tag such "hyper-boosted" objects that defines jets with radii that scale inversely proportional to their transverse boost and combines the standard calorimetric information with charged track-based observables. By means of a fast detector simulation, we apply it to top quark identification and demonstrate that our method efficiently discriminates hadronically decaying top quarks from light QCD jets up to transverse boosts of 20 TeV. Our results open the way to tagging heavy objects with energies in the multi-TeV range at present and future hadron colliders.

  8. Analysis of 3-dimentional track parameters from 2-dimensional images of etched tracks in solid polymeric track detectors

    NASA Astrophysics Data System (ADS)

    Paul, Sabyasachi; Tripathy, S. P.; Sarkar, P. K.

    2012-10-01

    An algorithm and a computer program (autoTRAK) are developed for rapid and precise estimation of track parameters in solid polymeric track detectors (SPTD). In this work, an effort is made to determine the 3-dimensional (3D) parameters such as depth (or length) and angle of the tracks, which are usually difficult to estimate from 2D images. The basic parameters such as diameter, major axis, minor axis, area, track density, etc. are also determined by the program precisely. The program is capable of selecting genuine tracks with precise tracing of track contours, segregating overlapped tracks and rejecting track-like unwanted objects. The algorithm is based on grey level analysis of the 2D images of etched nuclear tracks and is successfully tested for the analysis of alpha tracks in CR-39 detectors. The track depth values obtained by autoTRAK are found to match with those of other predictive codes. The details of the autoTRAK program and comparison of its output with those obtained using manual and automatic mode of other available image analyzing softwares, viz. ImageJ and AxioVision, are presented in the paper.

  9. Emission characteristics of VOCs from athletic tracks.

    PubMed

    Chang, F H; Lin, T C; Huang, C I; Chao, H R; Chang, T Y; Lu, C S

    1999-12-23

    Dynamic and flow-through flux chambers are convenient tools for field measurements of gas or VOC emission flux from solid surfaces in the field. This study was undertaken to collect on site and quantify the emissions of volatile organic compounds (VOCs) released from athletic running tracks. Three typical types of tracks, one synthetic rubber and two tracks (types I and II) consisting mainly of polyurethane, were studied. They were all installed with adhesives and backings, both of which contributed significant amount of VOCs. VOCs released from the track surface were collected with a flux chamber and subsequently analyzed by a gas chromatograph/mass spectrometer (GC/MS). Also, for each track and at each selected time the emission flux and mass emission were measured on site under outdoor conditions over a period of 40 min. GC/MS analyses show that the VOCs emitted include 2-methyl furan, butanal, methyl ethyl ketone, benzene, heptane, methyl isobutyl ketone, toluene+octane, hexanal, nonane+ethylbenzene, xylenes+styrene, propyl benzene, decane, 1,3,5-trimethyl benzene, 1,2,4-trimethyl benzene, 1,2, 3-trimethyl benzene and undecane. Of these, hexanal was the common and principal compound for all three types of tracks. 2-Methyl furan and methyl isobutyl ketone were the characteristic compounds for the synthetic rubber and the type II of polyurethane tracks, respectively. In the field studies, no unique compounds were found in the type I of polyurethane tracks. For each of these three types of tracks the total-VOCs emission flux was correlated to the track age and track surface temperature. The results of multiple regression analysis showed good correlation. The type II polyurethane track had the highest decay rate, while the synthetic rubber track had the lowest decay rate. Two years after the track installation, the VOC concentrations measured at 1.5 m above the track, the breathing height of school children, were not significantly higher than the background levels. PMID:10611425

  10. Is bank supervision central to central banking?

    Microsoft Academic Search

    Joe Peek; Eric S. Rosengren; Geoffrey M. B. Tootell

    1999-01-01

    Recently, several central banks have lost their bank supervisory responsibilities, in part because it has not been shown that supervisory authority improves the conduct of monetary policy. This paper finds that confidential bank supervisory information could help the Board staff more accurately forecast important macroeconomic variables and is used by FOMC members to guide monetary policy. These findings suggest that

  11. TDRSS tracking data and orbit determination evaluation

    NASA Technical Reports Server (NTRS)

    Campion, R. E.; Teles, J.; Pitt, P.

    1984-01-01

    TDRS-1 was launched on April 4, 1983. This paper presents preliminary results of TDRSS tracking data evaluation through September 1983. TDRSS tracking data evaluation is a summary of valid tracking data that characterizes data quality. TDRS-1 orbit accuracy is evaluated by using orbit consistency measured by comparing overlaps of TDRS-1 ephemerides produced from consecutive data arcs. TDRS-1 and user orbit accuracies and consistencies are also estimated. Orbit accuracy is estimated by comparing user orbits based on tracking data obtained both through the TDRSS and from ground-based tracking.

  12. Towards large scale multi-target tracking

    NASA Astrophysics Data System (ADS)

    Vo, Ba-Ngu; Vo, Ba-Tuong; Reuter, Stephan; Lam, Quang; Dietmayer, Klaus

    2014-06-01

    Multi-target tracking is intrinsically an NP-hard problem and the complexity of multi-target tracking solutions usually do not scale gracefully with problem size. Multi-target tracking for on-line applications involving a large number of targets is extremely challenging. This article demonstrates the capability of the random finite set approach to provide large scale multi-target tracking algorithms. In particular it is shown that an approximate filter known as the labeled multi-Bernoulli filter can simultaneously track one thousand five hundred targets in clutter on a standard laptop computer.

  13. Servo-controlled solar tracking apparatus

    SciTech Connect

    Trihey, J.M.

    1982-03-30

    The invention provides solar conversion apparatus comprising concentrating means for concentrating solar energy onto at least one surface of a heat transfer conduit, tracking means for causing the concentrating means to track the sun, the tracking means including radiation sensitive elements which are operable on differential thermal expansion thereof to generate tracking control signals and an electric motor for moving said concentrating means, said motor being responsive to said control signals, tracking movement thus being initiated by thermal radiation but is arrested by optical radiation which is of short response time.

  14. Leveraging Spatial Model to Improve Indoor Tracking

    NASA Astrophysics Data System (ADS)

    Liu, L.; Xu, W.; Penard, W.; Zlatanova, S.

    2015-05-01

    In this paper, we leverage spatial model to process indoor localization results and then improve the track consisting of measured locations. We elaborate different parts of spatial model such as geometry, topology and semantics, and then present how they contribute to the processing of indoor tracks. The initial results of our experiment reveal that spatial model can support us to overcome problems such as tracks intersecting with obstacles and unstable shifts between two location measurements. In the future, we will investigate more exceptions of indoor tracking results and then develop additional spatial methods to reduce errors of indoor tracks.

  15. Central Southern Thai Dictionary.

    ERIC Educational Resources Information Center

    Kaewkhao, Uthai; Kiatboonyarit, Tawan

    The dictionary for Central to Southern varieties of Thai is designed as a reference for use by Peace Corps volunteers assigned to southern Thailand. An introductory section gives an overview of the dictionary's content and design and some notes on tone patterns and spelling variation in the Central and Southern varieties. Most of the words…

  16. Central American update

    Microsoft Academic Search

    1987-01-01

    The Central American Energy Resources Project is designed to help the countries of Honduras, Costa Rica, El Salvador, Guatemala, and Panama develop their geothermal resources. Auxiliary project goals are to increase economic development and employment in Central America; to provide a scientific basis for the private sector to develop natural resources; and to provide scientific training to in-country scientists, engineers,

  17. On-Track Unit Conversion

    NSDL National Science Digital Library

    AMPS GK-12 Program,

    Students use three tracks marked on the floor, one in yards, one in feet and one in inches. As they start and stop a robot specific distances on a "runway," they can easily determine the equivalent measurements in other units by looking at the nearby tracks. With this visual and physical representation of the magnitude of the units of feet, yard and inches, students gain an understanding of what is meant by "unit conversion." They also gain a familiarity with different common units of measurement. They use multiplication and division to verify their physical estimated unit conversions. Students also learn about how common and helpful it is to convert from one unit to another in everyday situations and for engineering purposes. This activity helps students make the abstract concept of unit conversion real so they develop mental models of the magnitude of units instead of applying memorized conversion factors by rote.

  18. Tracking Electromagnetic Energy With SQUIDs

    NASA Technical Reports Server (NTRS)

    2005-01-01

    A superconducting quantum interference device (SQUID) is a gadget used to measure extremely weak signals, specifically magnetic flux. It can detect subtle changes in energy, up to 100 billion times weaker than the electromagnetic energy required to move a compass needle. SQUIDs are used for a variety of testing procedures where extreme sensitivity is required and where the test instrument need not come into direct contact with the test subject. NASA uses SQUIDs for remote, noncontact sensing in a variety of venues, including monitoring the Earth s magnetic field and tracking brain activity of pilots. Scientists at NASA s Goddard Space Flight Center have been making extensive use of this technology, from astrophysical research, to tracking the navigational paths of bees in flight to determine if they are using internal compasses. These very sensitive measurement devices have a wide variety of uses within NASA and even more uses within the commercial realm.

  19. Satellite tracking of threatened species

    USGS Publications Warehouse

    Williams, M.; Lunsford, A.; Ellis, D.; Robinson, J.; Coronado, P.; Campbell, W.

    1998-01-01

    In 1990, a joint effort of two U.S. federal agencies, NASA Goddard Space Flight Center (GSFC) and the Patuxent Wildlife Research Center, began. We initially joined forces in a project that used satellite telemetry to discover the winter home of a tiny dwindling population of Siberian Cranes. Since then several projects have emerged, and a web site was created to follow some of these activities. This web site is called the Satellite Tracking of Threatened Species and its location is http://sdcd.gsfc.nasa.gov/ISTO/satellite_tracking. It describes the overall program, and links you to three subsections that describe the projects in more detail: Satellite Direct Readout, Birdtracks, and Birdworld.

  20. Rover Tracks at Crater's Edge

    NASA Technical Reports Server (NTRS)

    2007-01-01

    Tracks left by NASA's Mars Exploration Rover Opportunity as it traveled along the rim of Victoria Crater can be seen clearly in this image taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter spacecraft.

    This is a subframe of a larger image that the camera acquired on June 26, 2007. The larger image will be released as HiRISE catalogue number PSP_004289_1780 after geometric processing.

    Opportunity first approached Victoria Crater at an alcove informally named 'Duck Bay' (see tracks at left). It then drove along the crater's sinuous edge in a clockwise direction before heading back to Duck Bay, where it is expected to enter the crater in early July 2007.

  1. Dunes and Dust Devil Tracks

    NASA Technical Reports Server (NTRS)

    2004-01-01

    22 August 2004 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a suite of dark sand dunes that formed in winds blowing from east (right) to west (left), along with smaller, lighter-toned ripples and many dark dust devil tracks. The dust devil tracks indicate movement from a variety of directions, while the dunes only indicate winds from the east. In the lower left quarter of the image, dune sand has flowed around a layered rock obstacle. This scene is located near 19.9oN, 280.5oW. The image covers an area about 3 km (1.9 mi) across and sunlight illuminates the scene from the lower left.

  2. The D/Ø Silicon Track Trigger

    NASA Astrophysics Data System (ADS)

    Steinbrück, Georg

    2003-09-01

    We describe a trigger preprocessor to be used by the D Ø experiment for selecting events with tracks from the decay of long-lived particles. This Level 2 impact parameter trigger utilizes information from the Silicon Microstrip Tracker to reconstruct tracks with improved spatial and momentum resolutions compared to those obtained by the Level 1 tracking trigger. It is constructed of VME boards with much of the logic existing in programmable processors. A common motherboard provides the I/O infrastructure and three different daughter boards perform the tasks of identifying the roads from the tracking trigger data, finding the clusters in the roads in the silicon detector, and fitting tracks to the clusters. This approach provides flexibility for the design, testing and maintenance phases of the project. The track parameters are provided to the trigger framework in 25 ?s. The effective impact parameter resolution for high-momentum tracks is 35 ?m, dominated by the size of the Tevatron beam.

  3. Porous fission fragment tracks in fluorapatite

    SciTech Connect

    Li Weixing; Ewing, Rodney C. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005 (United States); Wang Lumin [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Sun Kai [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Lang, Maik [Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005 (United States); Trautmann, Christina [GSI Helmholtz Centre for Heavy Ion Research, Planckstr. 1, 64291 Darmstadt (Germany)

    2010-10-01

    Fission tracks caused by the spontaneous fission of {sup 238}U in minerals, as revealed by chemical etching, are extensively used to determine the age and thermal history of Earth's crust. Details of the structure and annealing of tracks at the atomic scale have remained elusive, as the original track is destroyed during chemical etching. By combining transmission electron microscopy with in situ heating, we demonstrate that fission tracks in fluorapatite are actually porous tubes, instead of having an amorphous core, as generally assumed. Direct observation shows thermally induced track fragmentation in fluoapatite, in clear contrast to the amorphous tracks in zircon, which gradually ''fade'' without fragmentation. Rayleigh instability and the thermal emission of vacancies control the annealing of porous fission tracks in fluorapatite.

  4. Tracking Hidden Groups Using Communications

    Microsoft Academic Search

    Sudarshan S. Chawathe

    2003-01-01

    We address the problem of tracking a group of agents based on their communications over a network when the network devices\\u000a used for communication (e.g., phones for telephony, IP addresses for the Internet) change continually. We present a system\\u000a design and describe our work on its key modules. Our methods are based on detecting frequent patterns in graphs and on

  5. Deer Tracks in the City?

    ERIC Educational Resources Information Center

    Quigley, Cassie Fay; Beeman-Cadwallader, Nicole; Riggs, Morgan; Rodriguez, Antonia; Buck, Gayle

    2009-01-01

    "Why would a deer print be in the city?" wondered a student. She had noticed the track near a grocery store that morning with her mother. She was familiar with deer and had noticed their prints on a trip to a local museum; however, she had never seen a deer in the city before this experience. As she retold the story to her classmates, her question…

  6. TREC 2005 Genomics Track Overview

    Microsoft Academic Search

    William R. Hersh; Aaron M. Cohen; Jianji Yang; Ravi Teja Bhupatiraju; Phoebe M. Roberts; Marti A. Hearst

    2005-01-01

    The TREC 2005 Genomics Track featured two tasks, an ad hoc retrieval task and four subtasks in text categorization. The ad hoc retrieval task utilized a 10-year, 4.5-million document subset of the MEDLINE bibliographic database, with 50 topics conforming to five generic topic types. The categorization task used a full-text document collection with training and test sets consisting of about

  7. Tracking in Antiproton Annihilation Experiments

    E-print Network

    O. N. Hartmann

    2006-02-02

    A major ingredient of the planned new accelerator complex FAIR, to be constructed at the GSI, Darmstadt, Germany, is the availability of antiproton beams with high quality and intensity. Among the experiments which will make use of this opportunity is PANDA, a dedicated experiment to study antiproton annihilations on nucleons and nuclei. This article gives an overview on the foreseen techniques to perform charged particle tracking in the high rate environment of this experiment.

  8. Autostereoscopic display with eye tracking

    Microsoft Academic Search

    Takao Tomono; Kyung Hoon; Yong Soo Ha; Sung-Sik Kim; Jung-Young Son

    2002-01-01

    Auto-stereoscopic 21-inch display with eye tracking having wide viewing zone and bright image was fabricated. The image of display is projected to retinal through several optical components. We calculated optical system for wider viewing zone by using Inverse-Ray Trace Method. The viewing zone of first model is 155mm (theoretical value: 161mm). We could widen viewing zone by controlling paraxial radius

  9. New Human Face Expression Tracking

    Microsoft Academic Search

    Daria Kalinkina; André Gagalowicz

    2009-01-01

    In this paper we propose a new method for precise face expression tracking in a video sequence which uses a hierarchical animation\\u000a system built over a morphable polygonal 3D face model. Its low-level animation mechanism is based upon MPEG-4 specification\\u000a which is implemented via local point-driven mesh deformations adaptive to the face geometry. The set of MPEG-4 animation parameters\\u000a is

  10. Tracking frequency laser distance gauge

    Microsoft Academic Search

    J. D. Phillips; R. D. Reasenberg

    2005-01-01

    Advanced astronomical missions with greatly enhanced resolution and physics missions of unprecedented accuracy will require laser distance gauges of substantially improved performance. We describe a laser gauge, based on Pound–Drever–Hall locking, in which the optical frequency is adjusted to maintain an interferometer’s null condition. This technique has been demonstrated with pm performance. Automatic fringe hopping allows it to track arbitrary

  11. Earth-Image Tracking in the IR for Deep Space Optical Communications

    NASA Technical Reports Server (NTRS)

    Hemmati, Hamid; Chen, Yinging; Lee, Shinhak; Ortiz, Gerard G.

    2005-01-01

    Sub-microradian level laser beam pointing to an Earth-based receiver is required for deep space optical communications. This requires a beacon emanated from Earth towards the spacecraft. The beacon could be a laser or reflected sunlight from Earth. Earth image tracking in the visible is hampered by significant albedo variations and/or crescent Earth image yielding large central errors. Here, we report results of Earth-image tracking in the infrared (8 to 13 micron) region of the spectrum with the aim of substantially alleviating the two challenges mentioned earlier.

  12. High resolution 3D insider detection and tracking.

    SciTech Connect

    Nelson, Cynthia Lee

    2003-09-01

    Vulnerability analysis studies show that one of the worst threats against a facility is that of an active insider during an emergency evacuation. When a criticality or other emergency alarm occurs, employees immediately proceed along evacuation routes to designated areas. Procedures are then implemented to account for all material, classified parts, etc. The 3-Dimensional Video Motion Detection (3DVMD) technology could be used to detect and track possible insider activities during alarm situations, as just described, as well as during normal operating conditions. The 3DVMD technology uses multiple cameras to create 3-dimensional detection volumes or zones. Movement throughout detection zones is tracked and high-level information, such as the number of people and their direction of motion, is extracted. In the described alarm scenario, deviances of evacuation procedures taken by an individual could be immediately detected and relayed to a central alarm station. The insider could be tracked and any protected items removed from the area could be flagged. The 3DVMD technology could also be used to monitor such items as machines that are used to build classified parts. During an alarm, detections could be made if items were removed from the machine. Overall, the use of 3DVMD technology during emergency evacuations would help to prevent the loss of classified items and would speed recovery from emergency situations. Further security could also be added by analyzing tracked behavior (motion) as it corresponds to predicted behavior, e.g., behavior corresponding with the execution of required procedures. This information would be valuable for detecting a possible insider not only during emergency situations, but also during times of normal operation.

  13. ORTHO- ELIMINATION OF TRACKING SYSTEM CLOCK ERRORS

    NASA Technical Reports Server (NTRS)

    Wu, J. T.

    1994-01-01

    ORTHO is part of the Global Positioning System (GPS) being developed by the U.S. Air Force, a navigational system that will use 18 NAVSTAR satellites to broadcast navigation messages and achieve worldwide coverage. The normal positioning technique uses one receiver which receives signals from at least four GPS satellites. For higher accuracy work it is often necessary to use a differential technique in which more than one receiver is used. The geodetic measurement has all receivers on the ground and allows the determination of the relative locations of the ground sites. The main application of the ORTHO program is in the elimination of clock errors in a GPS based tracking system. The measured distance (pseudo-range) from a GPS receiver contains errors due to differences in the receiver and satellite clocks. The conventional way of eliminating clock errors is to difference pseudo-ranges between different GPS satellites and receivers. The Householder transformation used in this program performs a function similar to the conventional single differencing or double differencing. This method avoids the problem of redundancy and correlation encountered in a differencing scheme. It is able to keep all information contained in the measurements within the scope of a least square estimation. For multiple transmitter and receiver GPS tracking network, this method is in general more accurate than the differencing technique. This program assumes that the non-clock measurement partial derivatives for the particular application are computed earlier by another program. With the partial derivatives and information to identify the transmitters and receivers as the input, the program performs the Householder transformation on the partial derivatives. The transformed partials are output by the program and may be used as an input to the filter program in the subsequent estimation process. Clock partial derivatives are generated internally and are not part of the input to the program. ORTHO is written completely in FORTRAN 77 on the DEC VAX operating under VMS 4.5 and requires 805K of central memory. LINPACK, a public domain subroutine package distributed by Argonne National Laboratory and IMSL subroutine library, is required. ORTHO was released in 1988.

  14. Comparative analysis of Late Jurassic sauropod trackways from the Jura Mountains (NW Switzerland) and the central High Atlas Mountains (Morocco): implications for sauropod ichnotaxonomy

    Microsoft Academic Search

    Daniel Marty; Matteo Belvedere; Christian A. Meyer; Paolo Mietto; Géraldine Paratte; Christel Lovis; Basil Thüring

    2010-01-01

    Late Jurassic sauropod trackways from the Jura Mountains (NW Switzerland) and the central High Atlas Mountains (Morocco) are described and compared. Emphasis is put on track preservation and trackway configuration. The trackways are similar with respect to preservation and the pes and manus track outlines, but they show a large range of trackway configuration. Only one of the trackways reveals

  15. Multibeam optical apparatus and method for tracking control for an optical disk having a set of tracks

    NASA Technical Reports Server (NTRS)

    Reno, Charles W. (Inventor)

    1996-01-01

    A multitrack optical disk has two or more circular or spiral tracks, which are recorded or played back in simultaneous sets for high data rates. Tracking is accomplished by sets of first and second tracking pads, which lie partially on and partially off the track paths. The amount of inter-track space required to accommodate the track pads is reduced by placing the overlap of the tracking pads in the same inter-track space, and by tracking any additional simultaneous tracks in excess of two by mechanical coupling with the first two.

  16. Central nervous system

    MedlinePLUS

    The central nervous system is composed of the brain and spinal cord. Your brain and spinal cord serve as the main "processing center" for the entire nervous system, and control all the workings of your body.

  17. Central serous choroidopathy

    MedlinePLUS

    ... up without treatment in 1 or 2 months. Laser treatment or photodynamic therapy to seal the leak may ... small number of people will have complications from laser treatment that impair their central vision. That is why ...

  18. Probability: Central limit theorem

    NSDL National Science Digital Library

    2013-06-21

    After heuristically deriving Stirling's approximation in the first video segment, we outline a simple example of the central limit theorem for the case of the binomial distribution. In the final segment, we explain how the central limit theorem is used to suggest that physical experiments are characterized by normally-distributed (Gaussian) fluctuations while fluctuations in biological experiments are said to fill out log-normal distributions.

  19. Central core disease

    Microsoft Academic Search

    Heinz Jungbluth

    2007-01-01

    Central core disease (CCD) is an inherited neuromuscular disorder characterised by central cores on muscle biopsy and clinical\\u000a features of a congenital myopathy. Prevalence is unknown but the condition is probably more common than other congenital myopathies.\\u000a CCD typically presents in infancy with hypotonia and motor developmental delay and is characterized by predominantly proximal\\u000a weakness pronounced in the hip girdle;

  20. High performance adaptive tracking system: HPATS

    NASA Astrophysics Data System (ADS)

    Downs, James; Cannon, Randy; Segewitz, Markus; Stockum, Larry

    2005-05-01

    A high performance tracking system that adaptively adjusts the tracker algorithms and track loop parameters based on real-time scene statistics has been developed and demonstrated against realistic target scenarios. The HPATS provides the capability to acquire and track very low contrast targets in the presence of background clutter and time-vaying target conditions to sub-pixel accuracy. HPATS is applicable to both fire control and terminal guidance applications that incorporate imaging sensors. An overview of the tracking system design, simulation modeling, tracker metrics tools, and field test examples of low contrast target tracking performance is presented. The HPATS technology development included a high fidelity Integrated Flight Simulation (IFS) that modeled the end to end performance of the missile fly out, the target acquisition, the target tracking, aim-point selection, terminal guidance, and lethality.

  1. Isolated central vestibular syndrome.

    PubMed

    Kim, Sung-Hee; Park, Seong-Ho; Kim, Hyo-Jung; Kim, Ji-Soo

    2015-04-01

    Isolated vestibular syndrome may occur all along the vestibular pathways from the peripheral labyrinth to the brain. By virtue of recent developments in clinical neurotology and neuroimaging, however, diagnosis of isolated central vestibulopathy is increasing. Here, we review five distinct syndromes of isolated central vestibular syndrome from lesions restricted to the vestibular nuclei, the nucleus prepositus hypoglossi, the flocculus, the tonsil, and the nodulus, and introduce a new vestibular syndrome from isolated involvement of the inferior cerebellar peduncle. Decreased responses to head impulses do not exclude a central lesion as a cause of isolated vestibular syndrome. Brain imaging, including diffusion-weighted magnetic resonance imaging (MRI), may be falsely negative during the acute phase in patients with isolated vestibular syndrome because of a stroke. Central signs should be sought carefully in patients with isolated vertigo, even when the patients show the features of peripheral vestibulopathy and negative MRIs. Recognition of these isolated central vestibular syndromes would aid in defining the lesions responsible for various vestibular manifestations in central vestibulopathy. PMID:25735822

  2. Central line sepsis.

    PubMed

    Peterson, Kimberly K

    2003-01-01

    Since 1980, the placement of central venous access devices has become routine, and these catheters have been of great benefit in the treatment of patients with cancer. Unfortunately, central venous catheters have not been without complications. Central line sepsis has been reported to be one of the most frequently occurring complications, and although it is extremely costly to treat, more importantly, this condition is potentially life threatening to patients. Developing strategies that would prevent central line catheter infections has been a continual challenge for healthcare providers. Studies have been conducted on the use of catheters with antiseptic coatings, antimicrobial coatings, impregnated antimicrobial cuffs, prophylactic antibiotic therapy, antibiotic locks, use of antithrombolytics, different exit site dressings, and the use of various disinfectants for cleansing catheter exit sites. Healthcare providers, including oncology nurses, need to be knowledgeable concerning potential sources of infection and factors that may lead to central line sepsis (Chaiyakunapruk, Veenstra, Lipsky, & Saint, 2002; Darouiche et al., 1999; Little & Palmer, 1998; Veenstra, Saint, Saha, Lumley, & Sullivan, 1999). They need to advocate for the use of sterile technique during catheter insertion and aseptic technique when routine maintenance is provided and be aware of the standard treatments for and potential outcomes of central line catheter infections. In addition, oncology nurses should be encouraged to support and participate in controlled, randomized studies that may provide scientific-based practices that decrease the number of catheter-related infections in the future. PMID:12696220

  3. Particle displacement tracking for PIV

    NASA Technical Reports Server (NTRS)

    Wernet, Mark P.

    1990-01-01

    A new Particle Imaging Velocimetry (PIV) data acquisition and analysis system, which is an order of magnitude faster than any previously proposed system has been constructed and tested. The new Particle Displacement Tracing (PDT) system is an all electronic technique employing a video camera and a large memory buffer frame-grabber board. Using a simple encoding scheme, a time sequence of single exposure images are time coded into a single image and then processed to track particle displacements and determine velocity vectors. Application of the PDT technique to a counter-rotating vortex flow produced over 1100 velocity vectors in 110 seconds when processed on an 80386 PC.

  4. Multiple lesion track structure model

    NASA Technical Reports Server (NTRS)

    Wilson, John W.; Cucinotta, Francis A.; Shinn, Judy L.

    1992-01-01

    A multilesion cell kinetic model is derived, and radiation kinetic coefficients are related to the Katz track structure model. The repair-related coefficients are determined from the delayed plating experiments of Yang et al. for the C3H10T1/2 cell system. The model agrees well with the x ray and heavy ion experiments of Yang et al. for the immediate plating, delaying plating, and fractionated exposure protocols employed by Yang. A study is made of the effects of target fragments in energetic proton exposures and of the repair-deficient target-fragment-induced lesions.

  5. Robotic Target-Tracking Subsystem

    NASA Technical Reports Server (NTRS)

    Shawaga, Lawrence M.

    1989-01-01

    Position and orientation of target measured in six degrees of freedom. Robotic vision subsystem measures relative position and orientation of specially designed target. Uses standard image-processing algorithms implemented directly in circuitry instead of computer programs. This feature makes it possible to extract complete sets of target-tracking data from successive image frames at rate of 30 frames per second. Five bright circles of target positioned in such way that video images of them processed into data on position and orientation of target relative to camera. Subsystem useful in industrial assembly operation requiring automatic joining of parts initially oriented and moving randomly.

  6. Sensor-based animal tracking

    NASA Astrophysics Data System (ADS)

    Hunter, Andrew

    The advent of Global Positioning System (GPS) technologies has provided wildlife researchers with new insights into the movement and habitat utilization patterns of wildlife species by being able to provide vast quantities of detailed location data. However, current wildlife tracking techniques have numerous limitations, as GPS locations can be biased to an unknown extent because animals move through habitats that are often denied GPS signals. This can result in some habitat types being under sampled or not sampled at all. Additionally, researchers using GPS tracking systems cannot understand what behaviour an animal is exhibiting at each GPS position without either relying on extensive field data or statistical techniques that may infer behaviour. Overall these issues, and others, limit the knowledge that can be derived from the data currently being collected by GPS collars alone. To address these limitations, a dead reckoning solution (called the NavAid) has been developed to augment GPS tracking collars, which enables both the acquisition of continuous movement trajectories for animals under study, and the collection of digital images on a user-defined schedule along travel routes. Analysis of an animal's velocity allows one to identify different types of movement behaviours that can be associated with foraging, searching for food, and locomotion between patches. In addition, the ability to capture continuous paths allows researchers to identify habitat that is important to a species, and habitat that is not---something that is not possible when relying solely on GPS. This new system weighs approximately 220 g and can be deployed on most conventional collar systems for a wide range of species. This thesis presents the research and development of this new system over the past four years, along with preliminary findings from field work carried out on grizzly bears (Ursus arctos) in the foothills of the Canadian Rocky Mountains. Analysis of tracking data suggests that animals select different types of habitat for different purposes, that foraging occurs at movement rates of less than 52m/minute, searching for food between movement rates of 52 m/minute and 223 m/minute and locomotion, or active walking between foraging sites at movement rates greater than 223 m/minute.

  7. Complete Solution of Sun Tracking for Heliostat

    NASA Astrophysics Data System (ADS)

    Chen, Ying-Tian; Lim, Boon-Han; Lim, Chern-Sing

    2006-01-01

    A general solution of sun tracking for an arbitrarily oriented heliostat towards an arbitrarily located target on the earth is published. With the most general form of solar tracking formulae, it is seen that the used azimuth-elevation, spinning-elevation tracking formulae etc. are the special cases of it. The possibilities of utilizing the general solution and its significance in solar energy engineering are discussed.

  8. Quasi-inertial tracking for finding satellites

    Microsoft Academic Search

    R. Holdaway

    1986-01-01

    The concept of quasi-inerial tracking has been developed to aid the determination of satellite position and intersatellite range. It applies in particular where there is only limited knowledge of the satellite(s) absolute position. The ground station tracking antenna is driven in a pseudo-programmed mode so that it tracks a fixed inertial point in the orbit, allowing the satellite(s) to fly

  9. Diffraction-limited tracking for space communication

    Microsoft Academic Search

    J. A. Breisacher

    1988-01-01

    Diffraction-limited tracking for free-space laser communications, which requires that the laser beam be held at its undisturbed location to within a fraction of the system's angular resolution, is presently demonstrated for a system encompassing a transmitter, a receiver, and a far-field simulator. A fine-track detector consisting of a quadrant photodetector and fine-track processing electronics furnishes feedback for the system's flexurally

  10. Tracking highly maneuverable targets with unknown behavior

    Microsoft Academic Search

    CHAD SCHELL; STEPHEN P. LINDER; J. R. Zeider

    2004-01-01

    Tracking of highly maneuvering targets with unknown behavior is a difficult problem in sequential state estimation. The performance of predictive-model-based Bayesian state estimators deteriorates quickly when their models are no longer accurate or their process noise is large. A data-driven approach to tracking, the segmenting track identifier (STI), is presented as an algorithm that operates well in environments where the

  11. High performance adaptive tracking system: HPATS

    Microsoft Academic Search

    James Downs; Randy Cannon; Markus Segewitz; Larry Stockum

    2005-01-01

    A high performance tracking system that adaptively adjusts the tracker algorithms and track loop parameters based on real-time scene statistics has been developed and demonstrated against realistic target scenarios. The HPATS provides the capability to acquire and track very low contrast targets in the presence of background clutter and time-vaying target conditions to sub-pixel accuracy. HPATS is applicable to both

  12. Building the RHIC tracking lattice model

    SciTech Connect

    Luo, Y.; Fischer, W.; Tepikian, S.

    2010-01-27

    In this note we outline the procedure to build a realistic lattice model for the RHIC beam-beam tracking simulation. We will install multipole field errors in the arc main dipoles, arc main quadrupols and interaction region magnets (DX, D0, and triplets) and introduce a residual closed orbit, tune ripples, and physical apertures in the tracking lattice model. Nonlinearities such as local IR multipoles, second order chromaticies and third order resonance driving terms are also corrected before tracking.

  13. Improved particle filter for object tracking

    Microsoft Academic Search

    Tao Zhang; Shu-min Fei

    2011-01-01

    Robust real-time tracking of non-rigid objects is a challenging task. Color is a powerful feature for tracking deformable objects in image sequences with complex backgrounds. Color distribution is applied, as it is robust to partial occlusion, is rotation and scale invariant and computationally efficient. Particle filter has been proven very successful for non-linear and non-Gaussian estimation tracking problems. The article

  14. Reply to: Comment on ``Apatite Fission Track and (U Th)\\/He data from Fennoscandia: An example of underestimation of fission track annealing in apatite'' by B. W. H. Hendriks and T. F. Redfield

    Microsoft Academic Search

    B. W. H. Hendriks; T. F. Redfield

    2006-01-01

    In the absence of any remnant sedimentary rocks or other tangible geological evidence, Apatite Fission Track (AFT) data from Fennoscandia have been interpreted in terms of deep burial beneath a Caledonian foreland basin. We rejected this interpretation of AFT data from central Finland in 2005, in favor of one incorporating radiation enhanced annealing over geologically extended periods of time. The

  15. 76 FR 59050 - Changes To Implement the Prioritized Examination Track (Track I) of the Enhanced Examination...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-23

    ...DEPARTMENT OF COMMERCE United States Patent and Trademark...Examination Track (Track I) of the Enhanced Examination...Under the Leahy- Smith America Invents Act AGENCY: United States Patent and Trademark...that revised the rules of practice in...

  16. 49 CFR 218.27 - Workers on track other than main track.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...TRANSPORTATION RAILROAD OPERATING PRACTICES Blue Signal Protection of Workers § 218...track other than main track— (a) A blue signal must be displayed at or near each... (d) If rolling equipment requiring blue signal protection as provided...

  17. 49 CFR 218.27 - Workers on track other than main track.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...TRANSPORTATION RAILROAD OPERATING PRACTICES Blue Signal Protection of Workers § 218...track other than main track— (a) A blue signal must be displayed at or near each... (d) If rolling equipment requiring blue signal protection as provided...

  18. 49 CFR 218.27 - Workers on track other than main track.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...TRANSPORTATION RAILROAD OPERATING PRACTICES Blue Signal Protection of Workers § 218...track other than main track— (a) A blue signal must be displayed at or near each... (d) If rolling equipment requiring blue signal protection as provided...

  19. 49 CFR 218.27 - Workers on track other than main track.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...TRANSPORTATION RAILROAD OPERATING PRACTICES Blue Signal Protection of Workers § 218...track other than main track— (a) A blue signal must be displayed at or near each... (d) If rolling equipment requiring blue signal protection as provided...

  20. 49 CFR 218.27 - Workers on track other than main track.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...TRANSPORTATION RAILROAD OPERATING PRACTICES Blue Signal Protection of Workers § 218...track other than main track— (a) A blue signal must be displayed at or near each... (d) If rolling equipment requiring blue signal protection as provided...

  1. Hanford Environmental Information System (HEIS). Volume 7: Sample and Data Tracking subject area

    SciTech Connect

    Not Available

    1994-06-01

    The Hanford Environmental Information System (HEIS) Sample and Data Tracking subject area allows insertion of tracking information into a central repository where the data is immediately available for viewing. For example, a technical coordinator is able to view the current status of a particular sampling effort, from sample collection to data package validation dates. Four major types of data comprise the Sample and Data Tracking subject area: data about the mechanisms that groups a set of samples for a particular sampling effort; data about how constituents are grouped and assigned to a sample; data about when, where, and how samples are sent to a laboratory for analysis; and data bout the status of a sample`s constituent analysis requirements, i.e., whether the analysis results have been returned from the laboratory.

  2. Discovery of nuclear tracks in interplanetary dust

    NASA Technical Reports Server (NTRS)

    Bradley, J. P.; Brownlee, D. E.; Fraundorf, P.

    1984-01-01

    Nuclear tracks have been identified in interplanetary dust particles (IDP's) collected from the stratosphere. The presence of tracks unambiguously confirms the extraterrestrial nature of IDP's, and the high track densities (10 to the 10th to 10 to the 11th per square centimeter) suggest an exposure age of approximately 10,000 years within the inner solar system. Tracks also provide an upper temperature limit for the heating of IDP's during atmospheric entry, thereby making it possible to distinguish between pristine and thermally modified micrometeorites.

  3. Multiple hypothesis tracking for the cyber domain

    NASA Astrophysics Data System (ADS)

    Schwoegler, Stefan; Blackman, Sam; Holsopple, Jared; Hirsch, Michael J.

    2011-09-01

    This paper discusses how methods used for conventional multiple hypothesis tracking (MHT) can be extended to domain-agnostic tracking of entities from non-kinematic constraints such as those imposed by cyber attacks in a potentially dense false alarm background. MHT is widely recognized as the premier method to avoid corrupting tracks with spurious data in the kinematic domain but it has not been extensively applied to other problem domains. The traditional approach is to tightly couple track maintenance (prediction, gating, filtering, probabilistic pruning, and target confirmation) with hypothesis management (clustering, incompatibility maintenance, hypothesis formation, and Nassociation pruning). However, by separating the domain specific track maintenance portion from the domain agnostic hypothesis management piece, we can begin to apply the wealth of knowledge gained from ground and air tracking solutions to the cyber (and other) domains. These realizations led to the creation of Raytheon's Multiple Hypothesis Extensible Tracking Architecture (MHETA). In this paper, we showcase MHETA for the cyber domain, plugging in a well established method, CUBRC's INFormation Engine for Real-time Decision making, (INFERD), for the association portion of the MHT. The result is a CyberMHT. We demonstrate the power of MHETA-INFERD using simulated data. Using metrics from both the tracking and cyber domains, we show that while no tracker is perfect, by applying MHETA-INFERD, advanced nonkinematic tracks can be captured in an automated way, perform better than non-MHT approaches, and decrease analyst response time to cyber threats.

  4. Random grid fern for visual tracking

    NASA Astrophysics Data System (ADS)

    Cheng, Fei; Liu, Kai; Zhang, Jin; Li, YunSong

    2014-05-01

    Visual tracking is one of the significant research directions in computer vision. Although standard random ferns tracking method obtains a good performance for the random spatial arrangement of binary tests, the effect of the locality of image on ferns description ability are ignored and prevent them to describe the object more accurately and robustly. This paper proposes a novel spatial arrangement of binary tests to divide the bounding box into grids in order to keep more details of the image for visual tracking. Experimental results show that this method can improve tracking accuracy effectively.

  5. Single Track Performance of the Inner Detector New Track Reconstruction (NEWT)

    E-print Network

    Cornelissen, T; Gavrilenko, I; Liebig, W; Salzburger, A

    2008-01-01

    In a previous series of documents we have presented the new ATLAS track reconstruction chain (NEWT) and several of the involved components. It has become the default reconstruction application for the Inner Detector. However, a large scale validation of the reconstruction performance in both efficiency and track resolutions has not been given yet. This documents presents the results of a systematic single track validation of the new track reconstruction and puts it in comparison with results obtained with different reconstruction applications.

  6. Superior augmented reality registration by integrating landmark tracking and magnetic tracking

    Microsoft Academic Search

    Andrei State; Gentaro Hirota; David T. Chen; William F. Garrett; Mark A. Livingston

    1996-01-01

    Accurate registration between real and virtual objects is crucial for augmented reality applications. Existing tracking methods are individually inadequate: magnetic trackers are inaccurate, mechanical trackers are cumbersome, and vision-based trackers are computationally problematic. We present a hybrid tracking method that combines the accuracy of vision-based tracking with the robustness of magnetic tracking without compromising real-time performance or usability. We demonstrate

  7. Central exclusive dijet production at the Tevatron

    NASA Astrophysics Data System (ADS)

    Goulianos, Konstantin

    2014-11-01

    We present a review of central exclusive dijet production in \\bar pp collisions, where the proton and antiproton emerge intact, and only two jets of transverse energy above a certain threshold are present in the final state. The results are published in two papers by the Collider Detector at Fermilab (CDF) Collaboration, a PRL (2000) and a PRD (2008), based on data collected at ? s = 1.8 TeV and 1.96 TeV, respectively, and a D0 Collaboration paper from studies at 1.96 TeV. In all three cases predictions for the cross-section of Higgs boson production are discussed, a process that proceeds via a similar mechanism as dijet production. Roman Pot Spectrometers equipped with tracking detectors are used to measure the outgoing antiproton (CDF and D0) and proton (D0), and special forward detectors are employed to help reduce backgrounds and enrich the data in diffractive and exclusive dijet events.

  8. High efficiency and wideband envelope tracking power amplifier with sweet spot tracking

    Microsoft Academic Search

    Dongsu Kim; Jinsung Choi; Daehyun Kang; Bumman Kim

    2010-01-01

    This paper describes the implementation of a high efficiency and wideband envelope tracking power amplifier with sweet spot tracking. By modulating supply voltage of power amplifier (PA), efficiency can be increased significantly. And linearity is improved by envelope shaping and sweet spot tracking. The supply modulator has a combined structure of a switching amplifier and a linear amplifier to achieve

  9. Tracking of random references: random sensitivity function and tracking quality indicators

    Microsoft Academic Search

    Yongsoon Eun; Pierre T. Kabamba; Semyon M. Meerkov

    2003-01-01

    In this note, the problem of random reference tracking by linear feedback systems is addressed. The approach is based on the so-called random sensitivity function, which plays the same role as the usual sensitivity function in step reference tracking. Using the random sensitivity function, quality indicators for random reference tracking are introduced, and their utilization for analysis and design of

  10. Information seeking: an overview of web tracking and the criteria for tracking software

    Microsoft Academic Search

    Ina Fourie; Theo Bothma

    2007-01-01

    Purpose – The purpose of this article is to alert researchers to software for web tracking of information seeking behaviour, and to offer a list of criteria that will make it easier to select software. A selection of research projects based on web tracking as well as the benefits and disadvantages of web tracking are also explored. Design\\/methodology\\/approach – An

  11. Keeping on Track: Performance Profiles of Low Performers in Academic Educational Tracks

    ERIC Educational Resources Information Center

    Reed, Helen C.; van Wesel, Floryt; Ouwehand, Carolijn; Jolles, Jelle

    2015-01-01

    In countries with high differentiation between academic and vocational education, an individual's future prospects are strongly determined by the educational track to which he or she is assigned. This large-scale, cross-sectional study focuses on low-performing students in academic tracks who face being moved to a vocational track. If more is…

  12. CDC's National Environmental Public Health Tracking Network MAINE Keeping Track, Promoting Health

    E-print Network

    Tracking in Action Improved Public Health Preventing childhood lead poisoning The number of newly. But lead poisoning continues to threaten children's health and development. To continue reducing the numberCS225774_E CDC's National Environmental Public Health Tracking Network MAINE Keeping Track

  13. SwisTrack - a flexible open source tracking software for multi-agent systems

    Microsoft Academic Search

    Thomas Lochmatter; Pierre Roduit; Christopher M. Cianci; Nikolaus Correll; Jacques Jacot; Alcherio Martinoli

    2008-01-01

    Vision-based tracking is used in nearly all robotic laboratories for monitoring and extracting of agent positions, orientations, and trajectories. However, there is currently no accepted standard software solution available, so many research groups resort to developing and using their own custom software. In this paper, we present Version 4 of SwisTrack, an open source project for simultaneous tracking of multiple

  14. Multiple target tracking and multiple frequency line tracking using hidden Markov models

    Microsoft Academic Search

    Xianya Xie; Robin J. Evans

    1991-01-01

    The authors consider the application of hidden Markov models (HMMs) to the problem of multitarget tracking-specifically, to the problem of tracking multiple frequency lines. The idea of a mixed track is introduced, a multitrack Viterbi algorithm is described and a detailed analysis of the underlying Markov model is presented. Simulations show that in some cases, it is possible to avoid

  15. On the Wrong Track: How Tracking Is Associated with Dropping out of High School

    ERIC Educational Resources Information Center

    Werblow, Jacob; Urick, Angela; Duesbery, Luke

    2013-01-01

    Academic tracking has been shown to limit the quality of student instructional opportunities, decrease students' perceptions of their abilities, and negatively influence student achievement. These factors associated with academic tracking also may influence students in lower tracks to learn less and ultimately to drop out of high school. Few…

  16. CENTRAL PLATEAU REMEDIATION

    SciTech Connect

    ROMINE, L.D.

    2006-02-01

    A systematic approach to closure planning is being implemented at the Hanford Site's Central Plateau to help achieve the goal of closure by the year 2035. The overall objective of Central Plateau remediation is to protect human health and the environment from the significant quantity of contaminated material that resulted from decades of plutonium production in support of the nation's defense. This goal will be achieved either by removing contaminants or placing the residual contaminated materials in a secure configuration that minimizes further migration to the groundwater and reduces the potential for inadvertent intrusion into contaminated sites. The approach to Central Plateau cleanup used three key concepts--closure zones, closure elements, and closure process steps--to create an organized picture of actions required to complete remediation. These actions were merged with logic ties, constraints, and required resources to produce an integrated time-phased schedule and cost profile for Central Plateau closure. Programmatic risks associated with implementation of Central Plateau closure were identified and analyzed. Actions to mitigate the most significant risks are underway while high priority remediation projects continue to make progress.

  17. Tracking and Data Relay Satellite (TDRS) tracking and orbit determination

    NASA Technical Reports Server (NTRS)

    Teles, J.; Samii, M.; Nakai, Y.

    1986-01-01

    Analysis results were derived using the Goddard Trajectory Determination System to determine the orbit of TDRS-East. A batch weighted least-squares algorithm is used to fit the Bilateration Ranging Transponder system tracking measurements. Six state parameters (position and velocity components) and the solar radiation pressure coefficient are estimated. The solutions are obtained by fitting the data over 34 hr arcs that overlap by 10 hr. Ephemerides are generated over the 34 hr arcs and then compared over the overlapping regions. The position differences indicate the consistency of the solutions and give a measure of their accuracy. The effect of the modeling of perturbative forces (solar radiation pressure, nonspherical geopotential field) on these results are studied. Error analysis is performed using the ORAN program to estimate the effect of force-model errors and measurement-related errors on the TDRS-East ephemeris.

  18. Tracking and data relay satellite system configuration and tradeoff study. Volume 1: TDRS system summary, part 1

    NASA Technical Reports Server (NTRS)

    1972-01-01

    A Tracking and Data Relay Satellite System (TDRSS) concept for service of low and medium data rate user spacecraft has been defined. The TDRS system uses two geosynchronous dual spin satellites compatible with Delta 2914 to provide command, tracking, and telemetry service between multiple low earth orbiting users and a centrally located ground station. The low data rate user service capability via each TDRS is as follows: (1) forward link at UHF: voice to one user, commands to 20 users (sequential), range and range rate service, and (2) return link at VHF: voice from one user, data from 20 users (simultaneous), range and range rate return signals. The medium data rate user service via each TDRS is as follows: (1) forward link at S band: voice or command and tracking signals to one user, and (2) return link at S band: voice, data and tracking signals from one user "order wire" for high priority service requests (implemented with an earth coverage antenna).

  19. Cell link: Real-time data tracking of automobiles via cell phones

    Microsoft Academic Search

    Huasong Cao; Roland Hui; Victor C. M. Leung

    2010-01-01

    This paper explores the suitability and effectiveness of employing cell phones for real-time data collection and tracking on-board automobiles. We present a novel application that runs in a commercially available GPS-enabled cell phone to continuously log a vehicle's driving and engine performance and geocode the collected data at regular intervals. Data are reported to a central server in real-time, stored

  20. Looking south through east portion of Centralized Work Equipment (C.W.E.) ...

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

    Looking south through east portion of Centralized Work Equipment (C.W.E.) Storage Shed (Bldg. 126). Note overhead monorails for material-handling hoists. This shed stored track maintenance materials - Atchison, Topeka, Santa Fe Railroad, Albuquerque Shops, C.W.E. Storage Shed, 908 Second Street, Southwest, Albuquerque, Bernalillo County, NM

  1. International trends in health science librarianship: Part 6 Central Europe series.

    PubMed

    Viragos, Marta

    2013-06-01

    This is the 6th in a series of articles exploring international trends in health science librarianship with a focus on Central Europe in the first decade of the 21st century. The invited authors are from Hungry, Poland and Czech Republic. Future issues will track trends the Middle East and then the Far East. JM. PMID:23692457

  2. FaceTrack: Tracking and summarizing faces from compressed video Hualu Wang, Harold S. Stone*, Shih-Fu Chang

    E-print Network

    Chang, Shih-Fu

    FaceTrack: Tracking and summarizing faces from compressed video Hualu Wang, Harold S. Stone*, ShihTrack, a system that detects, tracks, and groups faces from compressed video data. We introduce the face tracking-acceler- ation, correlated-acceleration, and variable-dimension-filter models. We find that constant

  3. Effect of targeted dropsonde observations and best track data on the track forecasts of Typhoon Sinlaku (2008)

    E-print Network

    2008-01-01

    Effect of targeted dropsonde observations and best track data on the track forecasts of Typhoon dropsonde observations from T-PARC and the TC best track data on the track forecast of Typhoon Sinlaku (2008 not exist. Keywords: Ensemble kalman filter, typhoon track forecast, targeted dropsonde observations

  4. POWER CENTRALIZED SEMIGROUPS PRIMOZ MORAVEC

    E-print Network

    POWER CENTRALIZED SEMIGROUPS PRIMOZ MORAVEC Abstract. A semigroup is said to be power centralized if for every pair of elements x and y there exists a power of x commuting with y. The structure of power centralized groups and semigroups is investigated. In particular, we characterize 0-simple power centralized

  5. Terrain data aided passive ground target tracking

    Microsoft Academic Search

    Chang-Hwan Kim; Keeyoung Choi; Chang-Kyung Ryoo; Kyeong-Dae Park; Jin-Bok Kim; Ki-Sung Kim; Jong-Lae Jo

    2009-01-01

    The primary purpose of passive tracking function is to support weapon systems on the military aircraft. A ground-attacking aircraft must know the precise location of the target to fulfill its missions. The target tracking system must estimate location of the target passively, if the need of stealth performance is highly required. A target is designated using integrated sensors, such as

  6. Design and calibration for gaze tracking system

    Microsoft Academic Search

    Qiong Zhang; Zhiliang Wang; Jiannan Chi; Pengyi Zhang; Yi Yang

    2010-01-01

    This paper presents a system for eye gaze tracking. The system consists of two CCD cameras and two novel light sources for stereovision. We propose a method for system calibration of gaze tracking system, in which camera is not directly facing the screen and light sources. A planar mirror is used to make them visible to the camera. Using planar

  7. Tracking Long Duration Flows in Network Traffic

    Microsoft Academic Search

    Aiyou Chen; Yu Jin; Jin Cao; L. E. Li

    2010-01-01

    óWe propose the tracking of long duration o ws as a new network measurement primitive. Long-duration o ws are characterized by their long lived nature in time, and may not have high trafc volumes. We propose an efcient data streaming algorithm to effectively track long duration o ws. Our basic technique is to maintain only two Bloom lters at any

  8. Along-Track Reef Imaging System (ATRIS)

    USGS Publications Warehouse

    Brock, John; Zawada, Dave

    2006-01-01

    "Along-Track Reef Imaging System (ATRIS)" describes the U.S. Geological Survey's Along-Track Reef Imaging System, a boat-based sensor package for rapidly mapping shallow water benthic environments. ATRIS acquires high resolution, color digital images that are accurately geo-located in real-time.

  9. TRACK Internet Service 3.1 Introduction

    E-print Network

    Froude, Lizzie

    Chapter 3 TRACK Internet Service 3.1 Introduction In chapter 1 the idea of a TRACK Internet Service single computer may be infeasible. An Internet Service has been developed to address these issues of data storage and computer CPU. The Internet Service has been used to help with the large amount of data

  10. Topic Tracking Based on Linguistic Features

    Microsoft Academic Search

    Fumiyo Fukumoto; Yusuke Yamaji

    2005-01-01

    This paper explores two linguistically motivated restrictions on the set of words used for topic tracking on newspaper articles: named entities and headline words. We assume that named entities is one of the linguistic features for topic tracking, since both topic and event are related to a specific place and time in a story. The basic idea to use headline

  11. Layer tracking asymptotics and domain decomposition

    SciTech Connect

    Brown, D.L. (Los Alamos National Lab., NM (USA)); Chin, R.C.Y. (Indiana Univ.-Purdue Univ., Indianapolis, IN (USA)); Hedstrom, G.W. (Lawrence Livermore National Lab., CA (USA)); Manteuffel, T.A. (Colorado Univ., Denver, CO (USA))

    1990-01-01

    In this paper we present a preliminary report on our work on the tracking of internal layers in a singularly-perturbed convection-diffusion equation. We show why such tracking may be desirable, and we also show how to do it using domain decomposition based on asymptotic analysis. 16 refs.

  12. Track count estimator for DVD and CDROM

    Microsoft Academic Search

    Jim M. Graba

    1998-01-01

    An estimator is shown to accurately count tracks during a seek in a DVD or CDROM storage device. The estimator states are position and velocity. Although the gains can be adapted via the recursive Kalman equations, the track count accuracy suffers little degradation if the gains are fixed. The position estimate's bandwidth can be matched to the seek system poles

  13. Track and Field Omnibook. Second Edition.

    ERIC Educational Resources Information Center

    Doherty, J. Kenneth

    This track and field text is a second edition of the 1971 Track and Field Omnibook, a synthesis of the author's forty-five years experience as a participant in and coach of the sport. Divided into two sections, the text deals with both the event-specific techniques of coaching and the overall development of the coaching role. Part one, "The Human…

  14. Tracking and chasing in houseflies ( Musca )

    Microsoft Academic Search

    Christian Wehrhahn; Tomaso Poggio; Heinrich Biilthoff

    1982-01-01

    The flight trajectories of free flying female and male houseflies have been analyzed in 3 dimensions. Both female and male flies track other flies. The turning velocity ? (around the vertical axis) is linearly dependent upon the horizontal angle ?F (that is the angle between the trajectory of the tracking fly and the target) for small values of ?F in

  15. An Approach to Automatically Tracking Music Preference

    E-print Network

    Widmer, Gerhard

    An Approach to Automatically Tracking Music Preference on Mobile Players Tim Pohle,1 Klaus- rently playing track does not please her. We evaluate several algorithms and show that the best ones mobile communication providers, such as One6 . The user pays a fixed monthly fee and can listen to music

  16. Feature extraction of arc tracking phenomenon

    NASA Technical Reports Server (NTRS)

    Attia, John Okyere

    1995-01-01

    This document outlines arc tracking signals -- both the data acquisition and signal processing. The objective is to obtain the salient features of the arc tracking phenomenon. As part of the signal processing, the power spectral density is obtained and used in a MATLAB program.

  17. Galilean Tracks in the Physics Lab

    ERIC Educational Resources Information Center

    Hellman, Walter

    2011-01-01

    Variations of Galileo's famous track experiments in acceleration are commonly performed in high school and college. The purpose of this article is to present a sequence of three low-tech basic kinematics experiments using Galilean tracks that can be set up extremely quickly and yet generally yield excellent results. A low-cost construction method…

  18. Visual tracking for multimodal human computer interaction

    Microsoft Academic Search

    Jie Yang; Rainer Stiefelhagen; Uwe Meier; Alex Waibel

    1998-01-01

    In this paper, we present visual tracking techniques for multimodal human computer interaction. First, we discuss techniques for tracking human faces in which human skin-color is used as a major feature. An adaptive stochastic model has been developed to characterize the skin-color distributions. Based on the maximum likelihood method, the model parameters can be adapted for different people and different

  19. Robust Multiple Car Tracking with Occlusion Reasoning

    Microsoft Academic Search

    Dieter Koller; Joseph Weber; Jitendra Malik

    1994-01-01

    Abstract: In this work we address the problem of occlusion in tracking multiple 3D objects in a knownenvironment and propose a new approach for tracking vehicles in road traffic scenes using anexplicit occlusion reasoning step. We employ a contour tracker based on intensity and motionboundaries. The motion of the contour of the vehicles in the image is assumed to be

  20. Tracking Error and Active Portfolio Management

    Microsoft Academic Search

    Nadima El-Hassan; Paul Kofman

    2003-01-01

    Persistent bear market conditions have led to a shift of focus in the tracking error literature. Until recently the portfolio allocation literature focused on tracking error minimization as a consequence of passive benchmark management under portfolio weights, transaction costs and short selling constraints. Abysmal benchmark performance shifted the literature's focus towards active portfolio strategies that aim at beating the benchmark

  1. An algorithm for tracking multiple targets

    Microsoft Academic Search

    D. R. Reid

    1979-01-01

    An algorithm for tracking multiple targets in a cluttered enviroment is developed. The algorithm is capable of initiating tracks, accounting for false or missing reports, and processing sets of dependent reports. As each measurement is received, probabilities are calculated for the hypotheses that the measurement came from previously known targets in a target file, or from a new target, or

  2. Collaborative tracking in mobile underwater networks

    Microsoft Academic Search

    Diba Mirza; Curt Schurgers

    2009-01-01

    A key requirement of underwater sensing systems is to track the position of devices while submerged. Traditionally, such tracking has relied on inertial navigation units and acoustic range measurements with surface beacons to estimate node positions over time. While effective for small clusters of instruments, these approaches do not scale well when underwater systems become truly networked. Instead, networked instruments

  3. Incremental Learning for Robust Visual Tracking

    Microsoft Academic Search

    David A. Ross; Jongwoo Lim; Ruei-sung Lin; Ming-hsuan Yang

    2008-01-01

    Visual tracking, in essence, deals with non- stationary image streams that change over time. While most existing algorithms are able to track objects well in con- trolled environments, they usually fail in the presence of sig- nificant variation of the object's appearance or surrounding illumination. One reason for such failures is that many algo- rithms employ fixed appearance models of

  4. Low cost tracking Navaids error model verification

    Microsoft Academic Search

    A. Charych; A. Tatz; J. Lovell; R. Frederick

    1975-01-01

    Features and characteristics of the tracking navaids (Microwave Scanning Beam Landing System, Radar Altimeter, Tacan, rendezvous radar and one way Doppler extracter) were investigated. From the investigation, a set of specifications were developed for building equipment to verify the error model of the tracking navaids. Breadboard verification equipment (BVE) was built for the Microwave Scanning Beam Landing System and the

  5. Real-time closed-world tracking

    Microsoft Academic Search

    Stephen S. Intille; James W. Davis; Aaron F. Bobick

    1997-01-01

    A real-time tracking algorithm that uses contextual in- formation is described. The method is capable of simul- taneously tracking multiple, non-rigid objects when erratic movement and object collisions are common. A closed- world assumption is used to adaptively select and weight image features used for correspondence. Results of algo- rithm testing and the limitationsof the method are discussed. The algorithm

  6. Partnership Attitude Tracking Study, Teens 2002.

    ERIC Educational Resources Information Center

    2002

    The Partnership Attitude Tracking Study (PATS) is Partnership for a Drug Free America's (PDFA) unique contribution to the field of substance abuse prevention. An annual study that tracks the attitudes consumers have about illegal drugs, this research examines what PDFA's target audiences think and feel about various drugs. After a decade of rising…

  7. Data fusion for visual tracking with particles

    Microsoft Academic Search

    Patrick Perez; Jaco Vermaak; Andrew Blake

    2004-01-01

    The effectiveness of probabilistic tracking of objects in image sequences has been revolutionized by the development of particle filtering. Whereas Kalman filters are restricted to Gaussian distributions, particle filters can propagate more general distributions, albeit only approximately. This is of particular benefit in visual tracking because of the inherent ambiguity of the visual world that stems from its richness and

  8. Digital imaging system for track measurements

    Microsoft Academic Search

    R. B. Gammage; G. Espinosa

    1997-01-01

    A digital imaging system (DIS) has been implanted for counting and analysis of nuclear tracks in solids. This system presents advantages in comparison with similar systems. An optical microscope is used for the magnification of the tracks, a Color Camera Digital (CCD), converts the light into an electrical signal. Analog information is sent to the electronic card, digitizing the signal.

  9. Interdecadal Changes in Summertime Typhoon Tracks

    Microsoft Academic Search

    Chang-Hoi Ho; Jong-Jin Baik; Joo-Hong Kim; Dao-Yi Gong; Chung-Hsiung Sui

    2004-01-01

    The present work examines interdecadal variations of typhoon tracks in the western North Pacific (WNP) during the boreal summer (June September) for the period 1951 2001. Typhoon tracks are expressed as percentage values of the total number of typhoon passages into a 5° × 5° latitude longitude grid box with respect to the total number of typhoons formed in the

  10. A Real-Time Video Tracking System

    Microsoft Academic Search

    Alton L. Gilbert; Michael K. Giles; Gerald M. Flachs; Robert B. Rogers; U Yee Hsun

    1980-01-01

    Object identification and tracking applications of pattern recognition at video rates is a problem of wide interest, with previous attempts limited to very simple threshold or correlation (restricted window) methods. New high-speed algorithms together with fast digital hardware have produced a system for missile and aircraft identification and tracking that possesses a degree of ``intelligence'' not previously implemented in a

  11. Cloud tracking by scale space classification

    Microsoft Academic Search

    Dipti Prasad Mukherjee; Scott T. Acton

    2002-01-01

    The problem of cloud tracking within a sequence of geo-stationary satellite images has direct relevance to the analysis of cloud life cycles and to the detection of cloud motion vectors (CMVs). The proposed approach first identifies a homogeneous consistent cloud mass for tracking and then establishes motion correspondence within an image sequence. In contrast to the crosscorrelation based approach as

  12. TRACKING CONTROL OF PARABOLIC Luciano Pandolfi

    E-print Network

    Pandolfi, Luciano

    for the optimal control and the optimal trajectory. Keywords: Regulator problem, distributed systems, boundary, by investigating the tracking problem. This consists in finding a control v to force the output z of a given systemTRACKING CONTROL OF PARABOLIC SYSTEMS Luciano Pandolfi Politecnico di Torino, Dip. di Matematica

  13. Vehicle parameterization and tracking from traffic videos

    Microsoft Academic Search

    Anh Vu; K. Boriboonsomsin; M. Barth

    2010-01-01

    The popularity of surveillance cameras used in traffic management systems have produced large quantities of video data that cannot be processed easily by humans. We present a method used on high resolution traffic surveillance videos to track and estimate vehicles' state when the cameras are mounted on moderate height structures typically less than 10 meters. This tracking method enables a

  14. Evaluation of algorithms for UWB indoor tracking

    Microsoft Academic Search

    Juan Choliz; Angela Hernandez-Solana; Antonio Valdovinos

    2011-01-01

    Ultra-Wideband (UWB) stands out as one of the most promising technologies for the development of indoor location & tracking systems, providing very precise time of arrival measurement and consequently centimeter-level resolution in distance estimation. Once the distances to multiple reference nodes are estimated, several location & tracking algorithms can be used to compute user's position. Position calculation is a widely

  15. Mobile GPS tracking system using Holger Vmel

    E-print Network

    Vömel, Holger

    be recorded from launch site (or DSRC!) to avoid drop outs. · Need cell phone communication #12;Mobile GPS tracking system using STRATO Holger Vömel University of Colorado, CIRES and NOAA/CMDL #12;Mobile GPS tracking system using STRATO Huntsville soundings : November 1, 2002 November 2, 2002

  16. Tracking framework for heterogeneous sensor sources

    Microsoft Academic Search

    Mareike Kritzler; A. Kru?ger

    2010-01-01

    This paper presents a scale-independent (space and time) tracking framework for moving entities (objects, animals, humans). The framework allows for the integration, processing and visualization of spatio-temporal data obtained from heterogeneous sensor sources. The framework does not rely upon one tracking and localization technology for the data collection, but instead considers the combination of several technologies to obtain and calculate

  17. Object Classification and Tracking in Video Surveillance

    Microsoft Academic Search

    Qi Zang; Reinhard Klette

    2003-01-01

    The design of a video surveillance system is directed on automatic identifica- tion of events of interest, especially on tracking and classification of moving vehi- cles or pedestrians. In case of any abnormal activities, an alert should be issued. Normally a video surveillance system combines three phases of data processing: moving object extraction, moving object recognition and tracking, and decisions

  18. Tracking Vehicles in traffic Surveillance Video

    SciTech Connect

    Maire, M; Kamath, C

    2005-08-12

    We present a system for detecting and tracking vehicles in surveillance video. Our algorithm uses a simple motion model to determine salient regions in a sequence of video frames. Similar regions are associated between frames and clustered to yield coherent final tracks. The entire process is automatic and uses computation time that scales according to the size of the input video sequence.

  19. 30 CFR 57.12042 - Track bonding.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Resources 1 2012-07-01 2012-07-01 false Track bonding. 57.12042 Section 57.12042 Mineral Resources ...Electricity Surface and Underground § 57.12042 Track bonding. Both rails shall be bonded or welded at every joint...

  20. 30 CFR 56.12042 - Track bonding.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Resources 1 2013-07-01 2013-07-01 false Track bonding. 56.12042 Section 56.12042 Mineral Resources ...METAL AND NONMETAL MINES Electricity § 56.12042 Track bonding. Both rails shall be bonded or welded at every joint...

  1. 30 CFR 57.12042 - Track bonding.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Resources 1 2013-07-01 2013-07-01 false Track bonding. 57.12042 Section 57.12042 Mineral Resources ...Electricity Surface and Underground § 57.12042 Track bonding. Both rails shall be bonded or welded at every joint...

  2. Visual tracking with singular value particle filter

    Microsoft Academic Search

    Xiling Luo; Yan Huang

    2010-01-01

    Robust tracking is an important and challenging problem in computer vision. Most existing algorithms do not work well if there are confusing objects in the surrounding environment or the target appearance has a significant change. This paper describes a novel particle filter for object tracking. First, we treat the blob image of the object as a matrix and adopt singular

  3. Switching particle filters for efficient visual tracking

    Microsoft Academic Search

    Takashi Bando; Tomohiro Shibata; Kenji Doya; Shin Ishii

    2006-01-01

    Abstract In this article, we propose a new particle filtering scheme, called a switching particle filter, which allows robust and accurate visual tracking under typical circumstances of real-time visual tracking. This scheme switches two complementary sampling algorithms, Condensation and Auxiliary Particle Filter, in an on-line fashion based on the confidence of the filtered state of the visual target. The accuracy

  4. Switching particle filters for efficient visual tracking

    Microsoft Academic Search

    Takashi Bando; Tomohiro Shibata; Kenji Doya; Shin Ishii

    In this article, we propose a new particle filtering scheme, called a switching particle filter, which allows robust and accurate visual tracking under typical circumstances of real-time visual tracking. This scheme switches two complementary sampling algorithms, Condensation and Auxiliary Particle Filter, in an on-line fashion based on the confidence of the filtered state of the visual target. The accuracy and

  5. Target Tracking Based on Adaptive Particle Filter

    Microsoft Academic Search

    Tingting Wang; Jingling Wang; Chuanzhen Li; Hui Wang; Jianbo Liu

    2009-01-01

    This paper presents a method that can track non-rigid moving objects using adaptive particle filter based on spatiograms. Particle filters offer a probabilistic framework for dynamic state estimation and have proven to work well in target tracking. Two key components of particle filters are observation models and motion models. Firstly, because the observation model based on general color histograms discards

  6. Solar tracking control system Sun Chaser

    NASA Technical Reports Server (NTRS)

    Scott, D. R.; White, P. R.

    1978-01-01

    The solar tracking control system, Sun Chaser, a method of tracking the Sun in all types of weather conditions is described. The Sun Chaser follows the Sun from east to west in clear or cloudy weather, and resets itself to the east position after sundown in readiness for the next sunrise.

  7. Requirements Engineering Conferences: Wither Industry Tracks?

    E-print Network

    Wieringa, Roel

    Requirements Engineering Conferences: Wither Industry Tracks? Roel Wieringa, Pascal van Eck of Trento Italy jm@cs.toronto.edu Abstract--This position paper argues that industry tracks have no place in any research conference. Instead, a research conference should always have room for industrial case

  8. Layer tracking, asymptotics, and domain decomposition

    NASA Technical Reports Server (NTRS)

    Brown, D. L.; Chin, R. C. Y.; Hedstrom, G. W.; Manteuffel, T. A.

    1991-01-01

    A preliminary report is presented on the work on the tracking of internal layers in a singularly-perturbed convection-diffusion equation. It is shown why such tracking may be desirable, and it is also shown how to do it using domain decomposition based on asymptotic analysis.

  9. Three-Dimensional Visualization of Particle Tracks.

    ERIC Educational Resources Information Center

    Julian, Glenn M.

    1993-01-01

    Suggests ways to bring home to the introductory physics student some of the excitement of recent discoveries in particle physics. Describes particle detectors and encourages the use of the Standard Model along with real images of particle tracks to determine three-dimensional views of tracks. (MVL)

  10. Maneuvering Target Tracking Using Adaptive State Estimation

    Microsoft Academic Search

    Norman Gholson; Richard Moose

    1977-01-01

    Two approaches to a nonlinear state estimation problem are presented. The particular problem addressed is that of tracking a maneuvering target in three-dimensional space using spherical observations (radar data). Both approaches rely on semi-Markov modeling of target maneuvers and result in effective algorithms that prevent the loss of track that often occurs when a target makes a sudden, radical change

  11. Multiresolutional multiple-model target tracking

    Microsoft Academic Search

    Lang Hong

    1994-01-01

    A multiresolutional multiple-model target tracking algorithm is developed which uses the wavelet transform as a means for mapping data between different resolution levels. The algorithm is effective for tracking maneuvering targets given measurements with a low S\\/N ratio

  12. Target tracking problems subject to kinematic constraints

    Microsoft Academic Search

    MINJEA TAHK; JASON L. SPEYER

    1990-01-01

    Filtering problems with kinematic constraints which may arise in target tracking problems are considered. A novel approach which treats kinematic constraints as additional fictitious or pseudomeasurements is proposed. A numerical example is provided to show the technical feasibility of the proposed idea for target tracking problems. This example shows that the proposed method can improve estimation accuracy significantly for velocity

  13. On target tracking with binary proximity sensors

    Microsoft Academic Search

    Wooyoung Kim; Kirill Mechitov; Jeung-yoon Choi; Soo Kyung Ham

    2005-01-01

    We consider the use of binary proximity sensors for tracking targets. Such sensors provide only 1-bit information regarding a target's presence or absence in their vicinity, albeit with less than 100% reliability. A novel tracking method employing such binary sensors is proposed and its performance in different deployment scenarios evaluated. For a given target, the method utilizes the sensor outputs

  14. MPC for tracking of constrained nonlinear systems

    Microsoft Academic Search

    Antonio Ferramosca; Daniel Limón; Ignacio Alvarado; Teodoro Alamo; Eduardo F. Camacho

    2009-01-01

    This paper deals with the tracking problem for constrained nonlinear systems using a model predictive control (MPC) law. MPC provides a control law suitable for regulating constrained linear and nonlinear systems to a given target steady state. However, when the target operating point changes, the feasibility of the controller may be lost and the controller fails to track the reference.

  15. Measuring Tracking Accuracy of CCD Imagers

    NASA Technical Reports Server (NTRS)

    Stanton, R. H.; Dennison, E. W.

    1985-01-01

    Tracking accuracy and resolution of charge-coupled device (CCD) imaging arrays measured by instrument originally developed for measuring performance of star-tracking telescope. Operates by projecting one or more artifical star images on surface of CCD array, moving stars in controlled patterns, and comparing star locations computed from CCD outputs with those calculated from step coordinates of micropositioner.

  16. Way-point tracking control of ships

    Microsoft Academic Search

    K. Y. Pettersen; E. Lefeber

    2001-01-01

    The paper considers way-point tracking control of ships using yaw torque control. A full state feedback control law is developed using a cascaded approach, and proved to globally asymptotically stabilize the heading and the cross-track error of the ship. Simulation results are presented

  17. Centralized Mouse Repositories

    PubMed Central

    Donahue, Leah Rae; de Angelis, Martin Hrabe; Hagn, Michael; Franklin, Craig; Lloyd, K. C. Kent; Magnuson, Terry; McKerlie, Colin; Nakagata, Naomi; Obata, Yuichi; Read, Stuart; Wurst, Wolfgang; Hörlein, Andreas; Davisson, Muriel T.

    2013-01-01

    Because the mouse is used so widely for biomedical research and the number of mouse models being generated is increasing rapidly, centralized repositories are essential if the valuable mouse strains and models that have been developed are to be securely preserved and fully exploited. Ensuring the ongoing availability of these mouse strains preserves the investment made in creating and characterizing them and creates a global resource of enormous value. The establishment of centralized mouse repositories around the world for distributing and archiving these resources has provided critical access to and preservation of these strains. This article describes the common and specialized activities provided by major mouse repositories around the world. PMID:22945696

  18. The Central Limit Theorem

    NSDL National Science Digital Library

    Anderson-Cook, C.

    The applets in this section of Statistical Java allow you to see how the Central Limit Theorem works. The main page gives the characteristics of five non-normal distributions (Bernoulli, Poisson, Exponential, U-shaped, and Uniform). Users then select one of the distributions and change the sample size to see how the distribution of the sample mean approaches normality. Users can also change the number of samples. To select between the different applets you can click on Statistical Theory, the Central Limit Theorem and then the Main Page. At the bottom of this page you can make your applet selection.

  19. Central American update

    SciTech Connect

    Hodgson, S.F.

    1987-07-01

    The Central American Energy Resources Project is designed to help the countries of Honduras, Costa Rica, El Salvador, Guatemala, and Panama develop their geothermal resources. Auxiliary project goals are to increase economic development and employment in Central America; to provide a scientific basis for the private sector to develop natural resources; and to provide scientific training to in-country scientists, engineers, and technicians. The energy resources project began in March 1985. The progress being made in El Salvador (production well logging and geophysical operations), Panama (site selection for the first temperature-gradient well), and Honduras (well drilling of temperature-gradient wells) is summarized.

  20. MMT nightly tracking logs: a web-enabled database for continuous evaluation of tracking performance

    NASA Astrophysics Data System (ADS)

    Clark, D.; Gibson, J. D.; Porter, D.; Trebisky, T.

    2012-09-01

    Over the past few years, the MMT Observatory has developed a number of web browser front ends for operation interfaces and staff access to internal databases. Among these is a facility for viewed reduced tracking logs in both time series and FFTs for convenient examination of tracking performance. Part of the back-end software also keeps the tracking data in a searchable database, allowing data over long periods of time to be collected and analyzed to look for trends, the influence of environmental factors on tracking, and help detect tracking degradation in a timely manner.

  1. Satellite animal tracking feasibility studies

    NASA Technical Reports Server (NTRS)

    Buechner, H. K.

    1975-01-01

    A study was initiated in Tsavo National Park to determine movements and home ranges of individual elephants and their relations to overall distribution patterns and environmental factors such as rainfall. Methods used were radio tracking and observations of visually identifiable individuals. Aerial counts provided data on overall distribution. Two bulls and two cows were radio-tagged in Tsavo West and two bulls and four cows in Tsavo East, providing home range and movement data. The movements of individuals were useful in interpreting relatively major shifts in elephant distribution. Results point to the following preliminary conclusions: (1) elephants in the Tsavo area undertook long distance movements in fairly direct response to localized rainfall; (2) a subdivision of the overall population into locally distinct units may exist during the dry season but did not occur after significant rainfall; and (3) food appears to be the primary factor governing movements and distribution of elephants in the area.

  2. Differential spacecraft tracking by interferometry

    NASA Technical Reports Server (NTRS)

    Border, James S.; Folkner, William M.

    1990-01-01

    This study estimates measurement system errors for two space vehicles on the surface of Mars, and for two Mars orbiting spacecraft, which are being tracked by differential interferometry. In these examples, signals from all spacecraft lie within the same beamwidth of an earth-based radio antenna. The measurements of all spacecraft signals are made simultaneously; errors that scale with angular source separation or with temporal separation between measurement epochs are practically removed. It is shown that errors due to system thermal noise and to systematic effects within ground receiver electronics dominate, except for geometries when signals pass close to the sun, when solar plasma becomes the dominant error source. The instantaneous relative position of two orbiters may be measured to within ten meters, leading to 50-meter three-dimensional orbital accuracy.

  3. Video-Based People Tracking

    NASA Astrophysics Data System (ADS)

    Brubaker, Marcus A.; Sigal, Leonid; Fleet, David J.

    Vision-based human pose tracking promises to be a key enabling technology for myriad applications, including the analysis of human activities for perceptive environments and novel man-machine interfaces. While progress toward that goal has been exciting, and limited applications have been demonstrated, the recovery of human pose from video in unconstrained settings remains challenging. One of the key challenges stems from the complexity of the human kinematic structure itself. The sheer number and variety of joints in the human body (the nature of which is an active area of biomechanics research) entails the estimation of many parameters. The estimation problem is also challenging because muscles and other body tissues obscure the skeletal structure, making it impossible to directly observe the pose of the skeleton.

  4. The Track Imaging Cerenkov Experiment

    NASA Technical Reports Server (NTRS)

    Wissel, S. A.; Byrum, K.; Cunningham, J. D.; Drake, G.; Hays, E.; Horan, D.; Kieda, D.; Kovacs, E.; Macgill, S.; Nodulman, L.; Swordy, S. P.; Wagner, R.; Wakely, S. P.

    2012-01-01

    We describe a dedicated cosmic-ray telescope that explores a new method for detecting Cerenkov radiation from high-energy primary cosmic rays and the large particle air shower they induce upon entering the atmosphere. Using a camera comprising 16 multi-anode photomultiplier tubes for a total of 256 pixels, the Track Imaging Cerenkov Experiment (TrICE) resolves substructures in particle air showers with 0.086deg resolution. Cerenkov radiation is imaged using a novel two-part optical system in which a Fresnel lens provides a wide-field optical trigger and a mirror system collects delayed light with four times the magnification. TrICE records well-resolved cosmic-ray air showers at rates ranging between 0.01-0.1 Hz.

  5. The Track Imaging Cerenkov Experiment

    NASA Technical Reports Server (NTRS)

    Wissel, S. A.; Byrum, K.; Cunningham, J. D.; Drake, G.; Hays, E.; Horan, D.; Kieda, D.; Kovacs, E.; Magill, S.; Nodulman, L.; Swordy, S. P.; Wagner, R.; Wakely, S. P.

    2011-01-01

    We describe a. dedicated cosmic-ray telescope that explores a new method for detecting Cerenkov radiation from high-energy primary cosmic rays and the large particle air shower they induce upon entering the atmosphere. Using a camera comprising 16 multi-anode photomultiplier tubes for a total of 256 pixels, the Track Imaging Cerenkov Experiment (TrICE) resolves substructures in particle air showers with 0,086 deg resolution. Cerenkov radiation is imaged using a novel two-part optical system in which a Fresnel lens provides a wide-field optical trigger and a mirror system collects delayed light with four times the magnification. TrICE records well-resolved cosmic-ray air showers at rates ranging between 0.01-0.1 Hz.

  6. The track imaging Cherenkov experiment

    NASA Astrophysics Data System (ADS)

    Wissel, S. A.; Byrum, K.; Cunningham, J. D.; Drake, G.; Hays, E.; Horan, D.; Kieda, D.; Kovacs, E.; Magill, S.; Nodulman, L.; Swordy, S. P.; Wagner, R.; Wakely, S. P.

    2011-12-01

    We describe a dedicated cosmic-ray telescope that explores a new method for detecting Cherenkov radiation from high-energy primary cosmic rays and the large particle air shower they induce upon entering the atmosphere. Using a camera comprising 16 multi-anode photomultiplier tubes for a total of 256 pixels, the Track Imaging Cherenkov Experiment (TrICE) resolves substructures in particle air showers with 0.086° resolution. Cherenkov radiation is imaged using a novel two-part optical system in which a Fresnel lens provides a wide-field optical trigger and a mirror system collects delayed light with four times the magnification. TrICE records well-resolved cosmic-ray air showers at rates ranging between 0.01 Hz and 0.1 Hz.

  7. Etched tracks and serendipitous dosimetry.

    PubMed

    Fleischer, Robert L; Chang, Sekyung; Farrell, Jeremy; Herrmann, Rachel C; MacDonald, Jonathan; Zalesky, Marek; Doremus, Robert H

    2006-01-01

    Nuclear tracks in detectors that just happened to be there can be found in unexpected places. Eyeglasses, household glass, minerals, objects that were exposed to nuclear explosions, and space equipment on the moon are examples. Such materials allow us to measure doses of past radon exposures, cosmic-ray fluences, fission rates and neutrons. Incidental results include measuring mountain-building rates and deciding where finding oil is likely (or unlikely); in another case erosion rates of surface materials in space are found. New results that assess the effects of hydration layers on the leaching out from glass surfaces of imbedded alpha-recoil nuclei imply that long-term, retrospective radon measurements can be made more reliable by selecting only glass with compact hydration layers. PMID:16644937

  8. Bias estimation for multisensor tracking

    NASA Astrophysics Data System (ADS)

    Sviestins, Egils

    2000-07-01

    The paper presents a method for the estimation of the bias errors of active and passive sensors used in connection with multisensor multitarget tracking. It is based on comparing the measurements of targets of opportunity, and does not require reference targets or reference sensors. The method handles bias errors that vary with time, and is suitable for on-line processing. The most essential ingredients of the method are: Including of a priori values and uncertainties; minimization of the appropriate function; linearization around nominal points; introduction of process noise; and quasi-recursive processing. Bias estimation is often difficult because of the limited observability of sensor biases, in the sense that there amy not be a unique set of biases that explains the relative errors between measurements. This problem is discussed, and it is illustrated by simulations how the presented method avoids these problems.

  9. The particle track record of Fra Mauro.

    NASA Technical Reports Server (NTRS)

    Hart, H. R., Jr.; Comstock, G. M.; Fleischer, R. L.

    1972-01-01

    Apollo 14 breccias show a mixture of high and low track densities at most interior positions, indicating that the majority of the tracks have been inherited from the parent ingredients of the breccias. Using the lowest of these track densities as indicative of maximum postbrecciation surface residence times, we find a median 1.35 m.y., much younger than the less friable Apollo 11 and 12 igneous rocks. The igneous rock 14310 is studied as a part of a consortium, the results indicating a complex irradiation history. Soils are extremely variable, median track densities ranging over at least a factor of 200. Individual high density soil grains yield track density gradients having variable slopes, most of which are lower than expected from the Surveyor III filter glass results.

  10. Software for Tracking Costs of Mars Projects

    NASA Technical Reports Server (NTRS)

    Wong, Alvin; Warfield, Keith

    2003-01-01

    The Mars Cost Tracking Model is a computer program that administers a system set up for tracking the costs of future NASA projects that pertain to Mars. Previously, no such tracking system existed, and documentation was written in a variety of formats and scattered in various places. It was difficult to justify costs or even track the history of costs of a spacecraft mission to Mars. The present software enables users to maintain all cost-model definitions, documentation, and justifications of cost estimates in one computer system that is accessible via the Internet. The software provides sign-off safeguards to ensure the reliability of information entered into the system. This system may eventually be used to track the costs of projects other than only those that pertain to Mars.

  11. Twelve years of tracking 52-Hz whale calls from a unique source in the North Pacific

    NASA Astrophysics Data System (ADS)

    Watkins, William A.; Daher, Mary Ann; George, Joseph E.; Rodriguez, David

    2004-12-01

    A unique whale call with 50-52 Hz emphasis from a single source has been tracked over 12 years in the central and eastern North Pacific. These calls, referred to as 52-Hz calls, were monitored and analyzed from acoustic data recorded by hydrophones of the US Navy Sound Surveillance System (SOSUS) and other arrays. The calls were noticed first in 1989, and have been detected and tracked since 1992. No other calls with similar characteristics have been identified in the acoustic data from any hydrophone system in the North Pacific basin. Only one series of these 52-Hz calls has been recorded at a time, with no call overlap, suggesting that a single whale produced the calls. The calls were recorded from August to February with most in December and January. The species producing these calls is unknown. The tracks of the 52-Hz whale were different each year, and varied in length from 708 to 11,062 km with travel speeds ranging from 0.7 to 3.8 km/h. Tracks included (A) meandering over short ranges, (B) predominantly west-to-east movement, and (C) mostly north-to-south travel. These tracks consistently appeared to be unrelated to the presence or movement of other whale species (blue, fin and humpback) monitored year-round with the same hydrophones.

  12. Effects of wrist tendon vibration on arm tracking in people poststroke.

    PubMed

    Conrad, Megan O; Scheidt, Robert A; Schmit, Brian D

    2011-09-01

    The goal of this study was to evaluate the influence of wrist tendon vibration on a multijoint elbow/shoulder tracking task. We hypothesized that tendon vibration applied at the wrist musculature would improve upper arm tracking performance in chronic stroke survivors through increased, Ia-afferent feedback to the central nervous system (CNS). To test this hypothesis, 10 chronic stroke and 5 neurologically intact subjects grasped the handle of a planar robot as they tracked a target through a horizontal figure-8 pattern. A total of 36 trials were completed by each subject. During the middle trials, 70-Hz tendon vibration was applied at the wrist flexor tendons. Position, velocity, and electromyography data were evaluated to compare the quality of arm movements before, during, and after trials with concurrent vibration. Despite tracking a target that moved at a constant velocity, hand trajectories appeared to be segmented, displaying alternating intervals of acceleration and deceleration. Segments were identifiable in tangential velocity data as single-peaked, bell-shaped speed pulses. When tendon vibration was applied at the wrist musculature, stroke subjects experienced improved tracking performance in that hand path lengths and peak speed variability decreased, whereas movement smoothness increased. These performance improvements were accompanied by decreases in the muscle activity during movement. Possible mechanisms behind improved movement control in response to tendon vibration may include improved sensorimotor integration or improved cortical modulation of spinal reflex activity. PMID:21697444

  13. Track analysis of laser-illuminated etched track detectors using an opto-digital imaging system

    NASA Astrophysics Data System (ADS)

    Eghan, Moses J.; Buah-Bassuah, Paul K.; Oppon, Osborne C.

    2007-11-01

    An opto-digital imaging system for counting and analysing tracks on a LR-115 detector is described. One batch of LR-115 track detectors was irradiated with Am-241 for a determined period and distance for linearity test and another batch was exposed to radon gas. The laser-illuminated etched track detector area was imaged, digitized and analysed by the system. The tracks that were counted on the opto-digital system with the aid of media cybernetics software as well as spark gap counter showed comparable track density results ranging between 1500 and 2750 tracks cm-2 and 65 tracks cm-2 in the two different batch detector samples with 0.5% and 1% track counts, respectively. Track sizes of the incident alpha particles from the radon gas on the LR-115 detector demonstrating different track energies are statistically and graphically represented. The opto-digital imaging system counts and measures other track parameters at an average process time of 3-5 s.

  14. GPU COMPUTING FOR PARTICLE TRACKING

    SciTech Connect

    Nishimura, Hiroshi; Song, Kai; Muriki, Krishna; Sun, Changchun; James, Susan; Qin, Yong

    2011-03-25

    This is a feasibility study of using a modern Graphics Processing Unit (GPU) to parallelize the accelerator particle tracking code. To demonstrate the massive parallelization features provided by GPU computing, a simplified TracyGPU program is developed for dynamic aperture calculation. Performances, issues, and challenges from introducing GPU are also discussed. General purpose Computation on Graphics Processing Units (GPGPU) bring massive parallel computing capabilities to numerical calculation. However, the unique architecture of GPU requires a comprehensive understanding of the hardware and programming model to be able to well optimize existing applications. In the field of accelerator physics, the dynamic aperture calculation of a storage ring, which is often the most time consuming part of the accelerator modeling and simulation, can benefit from GPU due to its embarrassingly parallel feature, which fits well with the GPU programming model. In this paper, we use the Tesla C2050 GPU which consists of 14 multi-processois (MP) with 32 cores on each MP, therefore a total of 448 cores, to host thousands ot threads dynamically. Thread is a logical execution unit of the program on GPU. In the GPU programming model, threads are grouped into a collection of blocks Within each block, multiple threads share the same code, and up to 48 KB of shared memory. Multiple thread blocks form a grid, which is executed as a GPU kernel. A simplified code that is a subset of Tracy++ [2] is developed to demonstrate the possibility of using GPU to speed up the dynamic aperture calculation by having each thread track a particle.

  15. DISTRIBUTION STATION IN FOREGROUND, TRACK FOOTINGS AT LEFT CENTER, WATER ...

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

    DISTRIBUTION STATION IN FOREGROUND, TRACK FOOTINGS AT LEFT CENTER, WATER TOWER (BLDG. 0516) IN BACKGROUND. Looking northeast - Edwards Air Force Base, South Base Sled Track, Electrical Distribution Station, South side of Sled Track, Lancaster, Los Angeles County, CA

  16. NORTH SIDE FACING TRACK, SHOWING ELECTRICAL BOX AND CONCRETE VAULT ...

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

    NORTH SIDE FACING TRACK, SHOWING ELECTRICAL BOX AND CONCRETE VAULT - Edwards Air Force Base, South Base Sled Track, Electrical Distribution Station, South side of Sled Track, Lancaster, Los Angeles County, CA

  17. 21 CFR 821.20 - Devices subject to tracking.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS Tracking Requirements § 821.20 Devices subject to tracking. (a) A...

  18. 21 CFR 821.20 - Devices subject to tracking.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS Tracking Requirements § 821.20 Devices subject to tracking. (a) A...

  19. 21 CFR 821.20 - Devices subject to tracking.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS Tracking Requirements § 821.20 Devices subject to tracking. (a) A...

  20. 21 CFR 821.20 - Devices subject to tracking.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES MEDICAL DEVICE TRACKING REQUIREMENTS Tracking Requirements § 821.20 Devices subject to tracking. (a) A...