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1

The design and construction of the ZEUS central tracking detector  

Microsoft Academic Search

The mechanical, electrical and electronic design and construction of the ZEUS central tracking detector are described, together with the chamber monitoring and environmental control. This cylindrical drift chamber is designed for track reconstruction, electron identification and fast event triggering in a high beam-crossing rate, high magnetic field application.

B. Foster; J. Malos; D. H. Saxon; D. E. Clark; A. K. Jamdagni; C. Markou; D. B. Miller; D. G. Miller; L. W. Toudup; C. G. Auty; G. A. Blair; C. B. Brooks; R. J. Cashmore; A. T. Hanford; N. Harnew; A. R. Holmes; W. Linford; N. C. Martin; I. C. McArthur; J. Nash; K. N. Nobbs; R. L. Wastie; M. T. Williams; F. F. Wilson; R. D. Wilson; J. C. Hart; R. W. Hatley; J. W. Hiddleston; M. D. Gibson; N. A. McCubbin; A. Middleton; M. C. Morrissey; D. Morrow; P. O'Brien; B. T. Payne; J. C. H. Roberts; T. B. Shaw; C. K. Sinclair; E. W. G. Wallis; D. J. White; K. L. Yeo; F. W. Bullock; J. Dumper; T. J. Fraser; D. Hayes; T. W. Jones; D. E. Strachan; I. A. Vine

1994-01-01

2

ZEUS hardware control system  

Microsoft Academic Search

The ZEUS collaboration is building a system to monitor, control and document the hardware of the ZEUS detector. This system is based on a network of VAX computers and microprocessors connected via ethernet. The database for the hardware values will be ADAMO tables; the ethernet connection will be DECNET, TCP\\/IP, or RPC. Most of the documentation will also be kept

R. Loveless; P. Erhard; J. Ficenec; K. Gather; G. Heath; M. Iacovacci; J. Kehres; M. Mobayyen; D. Notz; R. Orr; A. Sephton; R. Stroili; K. Tokushuku; W. Vogel; J. Whitmore; L. Wiggers

1989-01-01

3

Highlights from ZEUS  

E-print Network

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.

M. Wing

2006-06-30

4

Communication-Aware Target Tracking using Navigation Functions Centralized Case  

E-print Network

is aimed at maintaining robot connectivity in realistic communication envi- ronments, while avoidingCommunication-Aware Target Tracking using Navigation Functions ­ Centralized Case Alireza maintaining their connectivity to a base station and avoiding collision. We propose a novel extension

Mostofi, Yasamin

5

Performance measurement of the upgraded D0 central track trigger  

SciTech Connect

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.

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

2006-12-01

6

Highlights from ZEUS Matthew Wing (UCL)  

E-print Network

>200GeV 2 (QCC ) -1 p (23.8 pb+ ZEUS CC e ) -1 p (60.9 pb + ZEUS CC (P=0) e p (ZEUS-S)+ SM e -1 -0.5 0 SM (ZEUS-S) eP )(pb)2 >200GeV 2 (QCC ZEUS (Pe=-1) = 7.4 ± 3.9 (stat.) ± 1.2 (syst.) (Pe=+1) = 0

7

Performance Measurement of the Upgraded D?? Central Track Trigger  

Microsoft Academic Search

The DOslash 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 times 1030 cm-2s-1. One of the upgraded systems is the central track trigger (CTT). The CTT uses the

Remigius K. Mommsen; John Anderson; Robert Angstadt; Levan Babukhadia; Mrinmoy Bhattacharjee; Gerald Blazey; Oana Boeriu; Fred Borcherding; Marc Buehler; Brian Connolly; Michael Cooke; M. Corcoran; Satish Desai; D. Evans; Y. Gershtein; P. Grannis; S. Grunendahl; Liang Han; E. Hazen; U. Heintz; C. Hensel; M. Hildreth; H. Hoeth; Yuan Hu; Shabnam Jabeen; V. Jain; M. Johnson; S. Khalatian; N. Khalatyan; D. Lincoln; S. Linn; Yanwen Liu; J. Lizarazo; D. Mackin; Y. Maravin; M. Martin; Y. Mutaf; Meenakshi Narain; C. Noding; J. Olsen; P. Padley; M. Pangilinan; R. Partridge; R. Ramirez-Gomez; S. Rapisarda; K. Stevenson; M. Tomoto; B. Vachon; T. Wijnen; N. Wilcer; G. Wilson; Shouxiang Wu; T. Wyatt; Qichun Xu; Kin Yip

2006-01-01

8

Central Particle Tracking Detectors in the PEN Experiment  

NASA Astrophysics Data System (ADS)

The PEN Collaboration is conducting a new measurement of the &+circ;->e^+?(?) (?e2 decay) branching ratio at the Paul Scherrer Institute, with the goal uncertainty of ?B/B 5x10-4 or lower. At present, the combined accuracy of all published ?e2 decay measurements lags behind the theoretical calculation by a factor of 40. In this contribution we describe the redesigned central region tracking detectors of the PEN detector. The design and performance of a pair of two-piece wedge degraders for simultaneous horizontal and vertical tracking of the &+circ; beam particles are presented in detail. After passing through the tracking degrader, the &+circ; beam is stopped in the center of an active target scintillator. The positrons from &+circ; and &+circ; decays are tracked in a pair of cylindrical MWPC's, and detected in a thin plastic scintillator hodoscope and a pure CsI electromagnetic calorimeter.

Frlez, Emil

2008-10-01

9

ZEUS results on inclusive diffraction  

NASA Astrophysics Data System (ADS)

Deep inelastic diffractive scattering, ep ? e'?*p ? e'XN, has been studied at HERA with the ZEUS detector in a wide kinematic range in the ?*p centre-of-mass energy W, the photon virtually Q2 and the mass of the system X, MX. ZEUS results on diffraction have been obtained using the MX method and by identifying leading protons which carry a large fraction of the incoming proton beam energy. They are presented in terms of the diffractive cross section, d?(MX,W,Q2)/dMX and the diffractive structure function, xIPF2D(3)(?,xIP,Q2).

Lim, Heuijin

2005-10-01

10

System Sciences A comparison of lightning data provided by ZEUS and LINET networks over Western Europe  

E-print Network

Abstract. In the framework of this paper, one-year of lightning data from the experimental network ZEUS operated by the National Observatory of Athens is compared to collocated data provided by the LINET detection network. The area of comparison is limited to a part of Central-Western Europe, where LINET data exhibits the highest data quality, permitting thus to be used as the validation dataset. The location error of ZEUS was calculated to be ?6.8 km, while the detection efficiency was ?25%, with a characteristic underdetection during nighttime. Moreover, the analysis revealed that ZEUS is also capable to detect not only cloud-to-ground but also intra-cloud strokes. Analysis of a specific case study revealed that the spatial distribution of ZEUS was very close to that of LINET, although the total number of strokes as seen by ZEUS is much lower than the one from LINET. The overall analysis permitted to assess the main characteristics of ZEUS network, information considered of paramount importance before the use of ZEUS data for a variety of observational and modeling work. 1

K. Lagouvardos; V. Kotroni; H. -d. Betz; K. Schmidt

11

First results from the central tracking trigger of the DO experiment  

E-print Network

An overview of the DO Central Track Trigger (CTT) for the Tevatron Run 2 program is presented. This newly commissioned system uses information from the DO Central Fiber Tracker and Preshower Detectors to generate trigger ...

Wilson, Graham Wallace; Johnson, Marvin; Jain, V.; Hu, Yuan; Hensel, Carsten; Grunendahl, S.; Grannis, P.; Evans, David; Desai, S.; Cooke, Michael; Connolly, B.

2004-08-01

12

ZEUS0042a 3rd December 2012  

E-print Network

, this note will define formats for the abstract, introduction etc. which should both reduce the time required to write the papers and the time required by editorial boards to rewrite them. This note will define many environment for ZEUS papers (called LATEX4ZEUS) has been set up. It is described and available for download

Buse, Karsten

13

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

E-print Network

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.)_________________________, wish to opt out of the Centralized Management of Licensure and Certification tracking by Human

Squire, Larry R.

14

Cluster-based centralized data fusion for tracking maneuvering targets using interacting multiple model algorithm  

Microsoft Academic Search

The interacting multiple model (IMM) algorithm has proved to be useful in tracking maneuvering targets. Tracking accuracy\\u000a can be further improved using data fusion. Tracking of multiple targets using multiple sensors and fusing them at a central\\u000a site using centralized architecture involves communication of large volumes of measurements to a common site. This results\\u000a in heavy processing requirement at the

V. Vaidehi; K. Kalavidya; S. Indira Gandhi

2004-01-01

15

A Tool for Programming AVR Microcontroller Networks the Zeus Programmer  

E-print Network

systems 2 Connections and Hardware The #19;Zeus#20;Programmer is connected to the PC via an RS-232A Tool for Programming AVR Microcontroller Networks #21; the #19;Zeus#20;Programmer Wolfgang Haidinger Research Report 51/2002 January 8, 2004 Abstract The #19;Zeus#20;Programmer is a tool used

16

Tracking Crustal Thickness Changes During Central Andean Deformation  

NASA Astrophysics Data System (ADS)

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.

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

2013-12-01

17

Implementation strategies for the central-level multihypothesis tracking fusion with multiple dissimilar sensors  

Microsoft Academic Search

The processor resource requirements for a central-level multi-hypothesis tracking (MHT) fusion system have been estimated to be beyond most of the currently known general purpose processors for naval applications. A benchmark MHT fusion system has been selected for Command and Control System (CCS) for a frigate class naval platform of the year 2000 and beyond. The system parameters have been

Elisa Shahbazian; Marc-Alain Simard; Sylvain Bourassa

1993-01-01

18

Construction of a cylindrical MWPC for the central tracking detector of H1  

Microsoft Academic Search

A set of two cylindrical multiwire proportional chambers, 2.2 meter long and 1 meter in diameter, are being built as part of the central tracking detector of the H1 experiment, at HERA. The chamber bodies are of sandwich type; the cathodes are segmented in pads. The transmission line, which is part of the sandwich, has an impedance matched to the

G. Bertrand-Coremans; A. de Roeck; J. P. Dewulf; E. Evrard; P. Huet; D. Johnson; P. Marage; J. Moreels; R. Roosen; G. van Beek

1990-01-01

19

Engineering design for a photovoltaic central station power plant using tracking concentrator photovoltaic arrays  

Microsoft Academic Search

A preliminary engineering design has been developed for a photovoltaic central station power plant that utilizes tracking concentrator photovoltaic (PV) arrays. This effort is part of a continuing research program funded by The Aerospace Corporation with the objective of defining and developing specifications for the subsystems and interfaces associated with the design of a photovoltaic power plant. In previous work

E. J. Simburger

1982-01-01

20

Tracks!  

NSDL National Science Digital Library

This activity gives students clues for finding animal tracks and explains how to preserve them with plaster casts. Also discussed are investigative uses of animal tracks, such as estimating populations of wildlife and determining habitat requirements. The extension activity involves using replicas of animal feet to develop a poster of tracks with habitat depiction and stories to accompany it.

21

Cost analysis of two anaesthetic machines: "Primus" and "Zeus"  

PubMed Central

Background Two anaesthetic machines, the "Primus" and the "Zeus" (Draeger AG, Lbeck, Germany), were subjected to a cost analysis by evaluating the various expenses that go into using each machine. Methods These expenses included the acquisition, maintenance, training and device-specific accessory costs. In addition, oxygen, medical air and volatile anaesthetic consumption were determined for each machine. Results Anaesthesia duration was 278 140 and 208 112 minutes in the Primus and the Zeus, respectively. The purchase cost was 3.28 and 4.58 per hour of operation in the Primus and the Zeus, respectively. The maintenance cost was 0.90 and 1.20 per hour of operation in the Primus and the Zeus, respectively. We found that the O2 cost was 0.015 0.013 and 0.056 0.121 per hour of operation in the Primus and the Zeus, respectively. The medical air cost was 0.005 0.003 and 0.016 0.027 per hour of operation in the Primus and the Zeus, respectively. The volatile anaesthetic cost was 2.40 2.40 and 4.80 4.80 per hour of operation in the Primus and the Zeus, respectively. Conclusion This study showed that the "Zeus" generates a higher cost per hour of operation compared to the "Primus". PMID:22216974

2012-01-01

22

Implementation strategies for the central-level multihypothesis tracking fusion with multiple dissimilar sensors  

NASA Astrophysics Data System (ADS)

The processor resource requirements for a central-level multi-hypothesis tracking (MHT) fusion system have been estimated to be beyond most of the currently known general purpose processors for naval applications. A benchmark MHT fusion system has been selected for Command and Control System (CCS) for a frigate class naval platform of the year 2000 and beyond. The system parameters have been selected to support the Anti-Air Warfare (AAW) mission requirements of a frigate which has a long range radar (LRR), a medium range radar (MRR), an electronic support measure (ESM) sensor, and an infra-red search and track (IRST) sensor. Appropriate fusion parameters have been selected to support the frigate mission, and the real-time capability to run the algorithms, the time required to perform a cycle of the central-level MHT fusion system has been estimated for a general purpose processor. This paper presents a comparative analysis of the two implementation strategies for the two modes of operation of the central-level benchmark MHT fusion system, by analyzing the system and fusion parameters selected in this study, estimating peak and average processor resource requirements, and evaluating the timing delays between contact detection and fusion for the two approaches. Based on the estimated processor and timing requirements of these approaches, this paper also presents a concurrent computing implementation, that is expected to permit the real-time execution of the central-level MHT fusion system for the AAW frigate within currently available computer technology for naval applications.

Shahbazian, Elisa; Simard, Marc-Alain; Bourassa, Sylvain

1993-09-01

23

Inclusive diffractive deep inelastic scattering at ZEUS  

NASA Astrophysics Data System (ADS)

We present new results from ZEUS on diffractive deep inelastic scattering, ?*p --> Xp, XN, for a wide range in Q2, W, MX, x{I {-0.2em}P}, ? . The diffractive cross section shows a steep decrease with t, dominant higher twist at low MX and predominant leading twist at large MX. For MX > 2 GeV, the diffractive structure function of the proton rises steeply as x{I {-0.2em}P} -> 0. The structure function of the Pomeron has a maximum near ? = 0.5 suggesting that the lowest state of the Pomeron is a q /line{q} state. For ? < 0.1, the pomeron structure function is rising as ? --> 0, and as Q2 increases, similar to the proton structure function.

Wolf, G.

24

Apatite fission track data from central Anatolian granitoids (Turkey): Constraints on Neo-Tethyan closure  

NASA Astrophysics Data System (ADS)

Apatite fission track age versus elevation profiles and temperature-time-path modeling indicate an early to middle Paleocene (57-62 Ma) rapid exhumation of the Middle to Late Cretaceous granitoids in central Anatolia and an Oligocene (28-30 Ma) rapid exhumation of the Eocene Kseda? batholith in the NE Sivas region, part of eastern central Pontides. The early to middle Paleocene rapid exhumation is thought to result from a regional compressional regime following the collision of the Eurasian Plate and the Tauride-Anatolide Platform at the closure of the Izmir-Ankara-Erzincan branch of the northern Neo-Tethys. The Oligocene accelerated exhumation of the Kseda? batholith is contemporaneous with the Oligo-Miocene closure of the southern Neo-Tethys which juxtaposed the amalgamated Eurasian and Tauride-Anatolide Platform and the African-Arabian Plate along the Bitlis-Zagros suture in southeast Anatolia. The compressional regime due to this collision affected a large area between the Greater Caucasus in the north and northern African-Arabian Plate in the south.

Boztu?, Durmu?; Jonckheere, Raymond C.

2007-06-01

25

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

Microsoft Academic Search

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

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

1994-01-01

26

High-voltage stability coatings in the Zeus panel  

Microsoft Academic Search

A high voltage is applied to the screen spacer of the Zeus panel to obtain high brightness and long phosphor lifetime. To prevent field emission due to high local field strength, the screen spacer is coated with a resistivity layer and a low secondary-electron-emission layer. Efficiently operating panels have been made with sputtered substoichiometric and stoichiometric silicon nitride films, and

A. R. Balkenende; G. T. Jaarsma; W. Hoogsteen; H. P. Lbl; M. Scholten

1996-01-01

27

Charm production in diffractive DIS and PHP at ZEUS  

E-print Network

The ZEUS experiment has measured charm production in diffractive DIS and in photoproduction. The data are in agreement with perturbative QCD calculations based on various parameterisations of diffractive parton distribution functions. The results are consistent with QCD factorisation in diffractive DIS and direct photoproduction.

Isabell-Alissandra Melzer-Pellmann; for the ZEUS collaboration

2007-08-03

28

FAST TRACK COMMUNICATION: Semi-classical central charge in topologically massive gravity  

NASA Astrophysics Data System (ADS)

It is shown that the warped black hole geometries discussed recently in arXiv:0807.3040 (Anninos et al 2008) admit an algebra of asymptotic symmetries isomorphic to the semi-direct product of a Virasoro algebra and an algebra of currents. The realization of this asymptotic symmetry by canonical charges allows us to find the central charge of the Virasoro algebra. The right-moving central charge c_R = -\\frac{(5\\hat{\

Compre, Geoffrey; Detournay, Stphane

2009-01-01

29

Simulating Radiating and Magnetized Flows in Multi-Dimensions with ZEUS-MP  

E-print Network

This paper describes ZEUS-MP, a multi-physics, massively parallel, message- passing implementation of the ZEUS code. ZEUS-MP differs significantly from the ZEUS-2D code, the ZEUS-3D code, and an early "version 1" of ZEUS-MP distributed publicly in 1999. ZEUS-MP offers an MHD algorithm better suited for multidimensional flows than the ZEUS-2D module by virtue of modifications to the Method of Characteristics scheme first suggested by Hawley and Stone (1995), and is shown to compare quite favorably to the TVD scheme described by Ryu et. al (1998). ZEUS-MP is the first publicly-available ZEUS code to allow the advection of multiple chemical (or nuclear) species. Radiation hydrodynamic simulations are enabled via an implicit flux-limited radiation diffusion (FLD) module. The hydrodynamic, MHD, and FLD modules may be used in one, two, or three space dimensions. Self gravity may be included either through the assumption of a GM/r potential or a solution of Poisson's equation using one of three linear solver packages (conjugate-gradient, multigrid, and FFT) provided for that purpose. Point-mass potentials are also supported. Because ZEUS-MP is designed for simulations on parallel computing platforms, considerable attention is paid to the parallel performance characteristics of each module. Strong-scaling tests involving pure hydrodynamics (with and without self-gravity), MHD, and RHD are performed in which large problems (256^3 zones) are distributed among as many as 1024 processors of an IBM SP3. Parallel efficiency is a strong function of the amount of communication required between processors in a given algorithm, but all modules are shown to scale well on up to 1024 processors for the chosen fixed problem size.

J. C. Hayes; M. L. Norman; R. A. Fiedler; J. O. Bordner; P. S. Li; S. E. Clark; A. ud-Doula; M. -M. Mac Low

2005-11-18

30

Diffractive D ?(2010) production in deep inelastic scattering from ZEUS  

NASA Astrophysics Data System (ADS)

Measurements of diffractive D ? production in deep inelastic scattering using the 1995-1997 ZEUS data are presented. Diffractive e+p ? e+XN interactions are identified by the presence of a large rapidity gap in the final state. D ? candidates are identified from the D ? ? D ? ? D 0? decay mode, where the D0 subsequently decays either to K-?+ + (c.c.) or K-?+?-?+ (c.c.). The integrated D ? cross section along with differential D ? cross sections as a function of Q 2, W, x p, p T (D ?) and ?(D ?) have been measured in a limited kinematic region. The fraction of D ? events produced diffractively has also been measured.

Cole, J. E.; ZEUS Collaboration

1999-10-01

31

FAST TRACK COMMUNICATION: Classical central extension for asymptotic symmetries at null infinity in three spacetime dimensions  

NASA Astrophysics Data System (ADS)

The symmetry algebra of asymptotically flat spacetimes at null infinity in three dimensions is the semi-direct sum of the infinitesimal diffeomorphisms on the circle with an Abelian ideal of supertranslations. The associated charge algebra is shown to admit a non-trivial classical central extension of Virasoro type closely related to that of the anti-de Sitter case.

Barnich, Glenn; Compre, Geoffrey

2007-03-01

32

A MEASUREMENT OF THE TOTAL PHOTON-PROTON CROSS SECTION AT ZEUS  

E-print Network

) at the UNIVERSITY OF WISCONSIN | MADISON 2001 #12; c Copyright 2001 by Richard N. Cross All Rights Reserved #12; i . . . . . . . . . . . . . . . . . . . . . . . . 26 3.2.1 The Uranium Calorimeter . . . . . . . . . . . . . . . . 27 3.2.2 The Central Tracking

33

Beam tracking simulation in the central region of a 13 MeV PET cyclotron  

NASA Astrophysics Data System (ADS)

This paper reports the trajectories simulation of proton beam in the central region of a 13 MeV PET cyclotron, operating with negative proton beam (for easier beam extraction using a stripper foil), 40 kV peak accelerating dee voltage at fourth harmonic frequency of 77.88 MHz, and average magnetic field of 1.275 T. The central region covers fields of 240mm 240mm 30mm size at 1mm resolution. The calculation was also done at finer 0.25mm resolution covering fields of 30mm 30mm 4mm size to see the effects of 0.55mm horizontal width of the ion source window and the halted trajectories of positive proton beam. The simulations show up to 7 turns of orbital trajectories, reaching about 1 MeV of beam energy. The distribution of accelerating electric fields and magnetic fields inside the cyclotron were calculated in 3 dimension using Opera3D code and Tosca modules for static magnetic and electric fields. The trajectory simulation was carried out using Scilab 5.3.3 code.

Anggraita, Pramudita; Santosa, Budi; Taufik, Mulyani, Emy; Diah, Frida Iswinning

2012-06-01

34

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

NASA Astrophysics Data System (ADS)

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.

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

2003-12-01

35

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

USGS Publications Warehouse

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.

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

2014-01-01

36

"Technical Observations on the Sculptures from the Temple of Zeus at Olympia"  

E-print Network

An understanding of the processes in building a Greek temple and of the processes in creating large marble sculpture supports the idea that the metopes and pedimental sculptures were installed unfinished in the Temple of Zeus at Olympia. This study...

Younger, John G.; Rehak, Paul

2009-01-01

37

Late Cretaceous-Cenozoic thermal evolution of the northern part of the Central Western Carpathians (Slovakia): revealed by zircon and apatite fission track thermochronology  

NASA Astrophysics Data System (ADS)

Tectono-thermal evolution of the northern part of Central Western Carpathians (Slovakia) was revealed by zircon and apatite fission track thermochronology of Neogene deposits, volcanic rocks, and crystalline basement. New fission track ages combined with previous geochronological data are correlated with main tectonic events and important palaeogeographic changes. (1) The palaeo-Alpine burial to more than 10 km depths, heating (> 320 C) and low-grade metamorphism of the crystalline basement was caused by crustal thickening due to nappe stacking driven by the collisional processes (~ 90-75 Ma). (2) Extensional collapse and exhumation of basement complexes during the Late Cretaceous to Middle Eocene (~ 75-40 Ma). (3) The extension process resulted in a new sedimentary cycle of the Central Carpathian Palaeogene Basin (~ 40-25 Ma) in the northern part of the Central Western Carpathians. During the ensuing burial under the thick sedimentary cover, the crystalline basement of the northern zone resided at hotter conditions (ca. > 120 C and < 200 C) which led to full annealing of apatite single-grain ages. In the meanwhile the southern zone of the crystalline basement was gradually exhumed to the depth of 5-3 km and occasionally appeared at the erosion surface. (4) Disintegration of the Central Carpathian Palaeogene Basin (~ 25-20 Ma) was closely connected with a partial exhumation of the Central Western Carpathians and intensive denudation. (5) The Middle to Late Miocene (~ 20-9 Ma) subduction of the Outer Carpathians substratum had crucial consequences for the tectonic evolution of the hinterland that was located in the upper crustal plate. The most external zone of the hinterland basement domain (L?ansk and Krivnska Fatra Mts.) was exhumed to the 5-3 km depth and the intramontane basins were opened. (6) New fission track data and geomorphological criteria refer to the Pliocene-Quaternary mountain building processes in the external zones of the Central Western Carpathians.

Krlikov, Silvia; Vojtko, Rastislav; Andriessen, Paul; Kov?, Michal; Fgenschuh, Bernhard; Hk, Jozef; Minr, Jozef

2014-03-01

38

Fission track thermochronology of Neogene plutons in the Principal Andean Cordillera of central Chile (33-35S): Implications for tectonic evolution and porphyry Cu-Mo mineralization  

Microsoft Academic Search

AbStRACt. Apatite fission track data for Miocene plutons of the western slope of the Principal Andean Cordillera in central Chile (33-35S) define a distinct episode of enhanced crustal cooling through the temperature range of the apatite partial annealing zone (~125-60C) from about 6 to 3 Ma. This cooling episode is compatible with accelerated exhumation of the plutons at the time

Vctor Maksaev; Francisco Munizaga; Marcos Zentilli; Reynaldo Charrier

2009-01-01

39

Jet Cross Sections in D* Photoproduction with ZEUS  

NASA Astrophysics Data System (ADS)

Charm photoproduction in D* photoproduction have been studied using 78.6 pb-1 of data collected by the ZEUS detector. The measurement of inclusive jet cross section with a D* in the final state was performed in the kinematic region, Q2 < 1 GeV, 130 < W < 280 GeV, pTD* > 3 GeV, |?D*| < 1.5, ETjet > 6 GeV and -1.5 < ?jet < 2.4. Differential cross sections as a function of ETjet and ?jet were compared to the NLO QCD predictions. There is a general agreement with the NLO QCD preditions. In addition to above requirements, a dijet sub-sample having at least two jets with ETjet > 6 GeV and the leading jet with ETjet > 7 GeV was used to measure dijet correlations. Dijet correlations are compared to the NLO QCD predictions and leading-order (LO) Monte Carlo (MC) models with parton showers (PS). Dijet correlations are described well by the LO+PS models, while the NLO QCD prediction underestimates the measurement in the region where higher-order effects are expected to become significant.

Kohno, Takanori

2005-10-01

40

The Zeus Mission Study An application of automated collaborative design  

NASA Astrophysics Data System (ADS)

The purpose of the Zeus Mission Study was threefold. As an element of a graduate course in spacecraft system engineering, its purpose was primarily educational to allow the students to apply their knowledge in a real mission study. The second purpose was to investigate the feasibility of applying advanced technology (the power antenna and solar electric propulsion concepts) to a challenging mission. Finally, the study allowed evaluation of the benefits of using quality-oriented techniques (Quality Function Deployment (QFD) and Taguchi Methods) for a mission study. To encourage innovation, several constraints were placed on the study from the onset. While the primary goal was to place at least one lander on Europa, the additional constraint of no nuclear power sources posed an additional challenge, particularly when coupled with the mass constraints imposed by using a Delta II class launch vehicle. In spite of these limitations, the team was able to develop a mission and spacecraft design capable of carrying three simple, lightweight, yet capable landers. The science return will more than adequately meet the science goals established QFD was used to determine the optimal choice of instrumentation. The lander design was selected from several competing lander concepts, including rovers. The carrier design was largely dictated by the needs of the propulsion system required to support the mission, although the development of a Project Trades Model (PTM) in software allowed for rapid recalculation of key system parameters as changes were made. Finally, Taguchi Methods (Design of Experiments) were used in conjunction with the PTM allowing for some limited optimization of design features.

Doyotte, Romain; Love, Stanley G.; Peterson, Craig E.

1999-11-01

41

Using Satellite Tracking to Optimize Protection of Long-Lived Marine Species: Olive Ridley Sea Turtle Conservation in Central Africa  

Microsoft Academic Search

Tractable conservation measures for long-lived species require the intersection between protection of biologically relevant life history stages and a socioeconomically feasible setting. To protect breeding adults, we require knowledge of animal movements, how movement relates to political boundaries, and our confidence in spatial analyses of movement. We used satellite tracking and a switching state-space model to determine the internesting movements

Sara M. Maxwell; Greg A. Breed; Barry A. Nickel; Junior Makanga-Bahouna; Edgard Pemo-Makaya; Richard J. Parnell; Angela Formia; Solange Ngouessono; Brendan J. Godley; Daniel P. Costa; Matthew J. Witt; Michael S. Coyne; Yan Ropert-Coudert

2011-01-01

42

Apatite fission track thermochronometry from central Alberta: Implications for the thermal history of the Western Canada Sedimentary Basin  

NASA Astrophysics Data System (ADS)

Apatite separated from 47 Cretaceous and Tertiary drill core and surface samples from the foreland basin strata of the Western Canada Sedimentary Basin (WCSB) have been analyzed for their apatite fission track (AFT) age and confined track length distribution. Thermal histories of the fission track data were then estimated using a constrained random search inversion technique based on the Durango apatite annealing model. Most importantly, this technique provides an estimate of the peak postdepositional temperature experienced by each sample with error bounds determined by the precision of the fission track data. Most apatite samples retain at least some tracks that formed prior to the time of maximum Cenozoic burial, assumed to be coincident with maximun temperature. Seven apatite samples were fully annealed during burial, during or following the Laramide Orogeny, and provide a minimum age of 42 Ma for heating. Lower Cretaceous samples from near the deformation front were fully annealed and attained temperatures of at least 119-138 C during maximum bural. In contrast, stratigraphically equivalent smaples at the northeastern end of the transect near the Cold Lake heavy oil and tar sand deposits did not exceed 80 C. Paleogeothermal gradients calculated using bounded estimates of the peak temperatures experienced by the samples, together with maximum burial estimates from coal moisture studies, range from approximately 20 C/km near the deformation front to as high as 60 C/km near the cratonic edge of the basin. This variation has the same trend as present geothermal gradients, which range from approximately 30 C/km to 45 C/km, but indicates a greater constrast at the end of the Laramide. The results are consistent with the concept of heat transport by basinal scale fluid flow.

Ravenhurst, Casey E.; Willett, Sean D.; Donelick, Raymond A.; Beaumont, Christopher

1994-10-01

43

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 Central

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 and 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 individuals prepotent cue into a stronger motivational magnet at phasic moments triggered by a CS that predicts the reward UCS. PMID:22391118

DiFeliceantonio, Alexandra G.; Berridge, Kent C.

2012-01-01

44

ZEUS-2: a second generation submillimeter grating spectrometer for exploring distant galaxies  

E-print Network

ZEUS-2, the second generation (z)Redshift and Early Universe Spectrometer, like its predecessor is a moderate resolution (R~1000) long-slit, echelle grating spectrometer optimized for the detection of faint, broad lines from distant galaxies. It is designed for studying star-formation across cosmic time. ZEUS-2 employs three TES bolometer arrays (555 pixels total) to deliver simultaneous, multi-beam spectra in up to 4 submillimeter windows. The NIST Boulder-built arrays operate at ~100mK and are readout via SQUID multiplexers and the Multi-Channel Electronics from the University of British Columbia. The instrument is cooled via a pulse-tube cooler and two-stage ADR. Various filter configurations give ZEUS-2 access to 7 different telluric windows from 200 to 850 micron enabling the simultaneous mapping of lines from extended sources or the simultaneous detection of the 158 micron [CII] line and the [NII] 122 or 205 micron lines from z = 1-2 galaxies. ZEUS-2 is designed for use on the CSO, APEX and possibly JCM...

Ferkinhoff, Carl; Parshley, Stephen C; Stacey, Gordon J; Irwin, Kent D; Cho, Hsiao-Mei; Halpern, Mark; 10.1117/12.857018

2010-01-01

45

Introducing ZEUS-MP: A 3D, Parallel, Multiphysics Code for Astrophysical Fluid Dynamics  

E-print Network

We describe ZEUS-MP: a Multi-Physics, Massively-Parallel, Message-Passing code for astrophysical fluid dynamics simulations in 3 dimensions. ZEUS-MP is a follow-on to the sequential ZEUS-2D and ZEUS-3D codes developed and disseminated by the Laboratory for Computational Astrophysics (lca.ncsa.uiuc.edu) at NCSA. V1.0 released 1/1/2000 includes the following physics modules: ideal hydrodynamics, ideal MHD, and self-gravity. Future releases will include flux-limited radiation diffusion, thermal heat conduction, two-temperature plasma, and heating and cooling functions. The covariant equations are cast on a moving Eulerian grid with Cartesian, cylindrical, and spherical polar coordinates currently supported. Parallelization is done by domain decomposition and implemented in F77 and MPI. The code is portable across a wide range of platforms from networks of workstations to massively parallel processors. Some parallel performance results are presented as well as an application to turbulent star formation.

Michael L. Norman

2000-05-05

46

Robotic laparoscopic surgery: a comparison of the da Vinci and Zeus systems  

Microsoft Academic Search

Objectives. To evaluate two currently available robotic surgical systems in performing various urologic laparoscopic procedures in an acute porcine model.Methods. Robotic laparoscopic surgery was performed in 14 swine. Data were compared between the da Vinci Robotic System and the Zeus Robotic System.Results. During laparoscopic nephrectomy, the da Vinci System (n = 6) had a significantly shorter total operating room time

Gyung Tak Sung; Inderbir S Gill

2001-01-01

47

FAST TRACK PAPER: Surface deformation in the Abruzzi region, Central Italy, from multitemporal DInSAR analysis  

NASA Astrophysics Data System (ADS)

We investigate the 1992-2000 surface deformation affecting the Abruzzi region, Central Italy, by exploiting two set of Synthetic Aperture Radar (SAR) data, acquired by the ERS-1/2 SAR sensors from ascending and descending orbits, respectively. We apply the Small BAseline Subset (SBAS) Differential Synthetic Aperture Radar Interferometry (DInSAR) technique to the SAR data set to estimate the displacement time-series and the corresponding velocity maps. Our DInSAR analysis allows us to detect a previously unreported major change in crustal deformation moving from the highest elevation of the Central Apennines to the Adriatic sector, that we infer as evidence of a complex tectonic boundary between two Adriatic microplates involving a wide interaction zone. An extension effect, at a rate of about 0.10 10-6 yr-1, is also confirmed by our investigation. Our findings may have important implications in the seismic hazard assessment within the Adriatic region in Central Italy.

Hunstad, I.; Pepe, A.; Atzori, S.; Tolomei, C.; Salvi, S.; Lanari, R.

2009-09-01

48

[CII] At 1 < z < 2: Observing Star Formation in the Early Universe with Zeus (1 and 2)  

NASA Technical Reports Server (NTRS)

We report the detection of the [CII] 158 micron fine structure line from six submillimeter galaxies with redshifts between 1.12 and 1.73. This more than doubles the total number of [CII] 158 micron detections reported from high redshift sources. These observations were made with the Redshift(z) and Early Universe Spectrometer(ZEUS) at the Caltech Submillimeter Observatory on Mauna Kea, Hawaii between December 2006 and March 2009. ZEUS is a background limited submm echelle grating spectrometer (Hailey-Dunsheath 2009). Currently we are constructing ZEUS-2. This new instrument will utilize the same grating but will feature a two dimensional transition-edge sensed bolometer array with SQUID multiplexing readout system enabling simultaneous background limited observations in the 200, 340,450 and 650 micron telluric windows. ZEUS-2 will allow for long slit imaging spectroscopy in nearby galaxies and a [CII] survey from z 0.25 to 2.5.

Ferkinhoff, Carl; Hailey-Dunsheath, S.; Nikola, T.; Oberst, T.; Parshley, S.; Stacey, G.; Benford, D.; staguhn, J.

2010-01-01

49

ZEUS2D: A Radiation Magnetohydrodynamics Code for Astrophysical Flows in Two Space Dimensions. II. The Magnetohydrodynamic Algorithms and Tests  

Microsoft Academic Search

In this, the third of a series of three papers, we conclude a detailed description ofZEUS-2D, a numerical code for the simulation of fluid dynamical flows in astrophysicsincluding a self-consistent treatment of the effects of magnetic fields and radiationtransfer. In this paper, we describe the radiation hydrodynamical (RHD) algorithmsin ZEUS-2D.We develop a two-dimensional full transport algorithm to evolve the radiation

James M. Stone; Michael L. Norman

1992-01-01

50

Calibration and Monitoring of the ZEUS Uranium Scintillator Calorimeter at Hera  

NASA Astrophysics Data System (ADS)

One of the main components of the ZEUS detector at the HERA storage ring is the Uranium Calorimeter (UCAL). It has been running successfully since ZEUS started data taking in 1992. The UCAL is a Uranium-Scintillator calorimeter with equal response for electrons and hadrons ({(e)/(h) = 1.00 0.05; ), a linear energy response and a high energy resolution of (? (E))/(E) = (18% )/( ? {E)} for electrons and (? (E))/(E) = (35% )/(? {E)} for hadrons. It covers 99.7% of the solid angle and is able to handle bunch crossing rate of up to 10.4 MHz. This performance demands a very precise calibration and a constant monitoring of the detector. In this paper we present the procedure to achieve a calibration accuracy of better than 3% and to maintain it stable to better than 2% for more than 10 years.

Barbi, M.

2002-01-01

51

Tracking dynamic team activity  

SciTech Connect

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.

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

1996-12-31

52

Tracking sediment through the Holocene: Determining anthropogenic contributions to a sediment-rich agricultural system, north-central USA  

NASA Astrophysics Data System (ADS)

Management and restoration of sediment-impaired streams requires quantification of sediment sources and pathways of transport. Addressing the role of humans in altering the magnitude and sources of sediment supplied to a catchment is notoriously challenging. Here, we explore how humans have amplified erosion in geomorphically-sensitive portions of the predominantly-agricultural Minnesota River basin in north-central USA. In the Minnesota River basin, the primary sources of sediment are classified generally as upland agricultural field vs. near-channel sources, with near-channel sources including stream banks, bluffs, and ravines. Using aerial lidar data, repeat terrestrial lidar scans of bluffs, ravine monitoring, historic air photo analyses, and sediment fingerprinting, we have developed a sediment budget to determine the relative importance of each source in a tributary to the Minnesota River, the Le Sueur River. We then investigate how these sources have changed through time, from changes evident over the past few decades to changes associated with valley evolution over the past 13,400 years. The Minnesota River valley was carved ~13,400 years ago through catastrophic drainage of glacial Lake Agassiz. As the Minnesota River valley incised, knickpoints have migrated upstream into tributaries, carving out deep valleys where the most actively eroding near-channel sediment sources occur. The modern sediment budget, closed for the time period 2000 to 2010, shows that the majority of the fine sediment load in the Le Sueur River comes from bluffs and other near-channel sources in the deeply-incised knick zone. Numerical modeling of valley evolution constrained by mapped and dated strath terraces cut into the glacial till presents an opportunity to compare the modern sediment budget to that of the river prior to anthropogenic modification. This comparison reveals a natural background or "pre-agriculture" rate of erosion from near-channel sources to be 3-5 times lower than modern near-channel erosion rates. Notably, depositional records from a naturally-dammed lake downstream on the upper Mississippi River show a more dramatic 10-fold increase in deposition rates from pre-agricultural times to the present. Sediment fingerprinting shows that pre-agriculture sediment loads were dominated by near-channel sediment sources. As deposition rates rose in the late 1800s and early 1900s, the sources shifted increasingly to agricultural soil erosion. In the past few decades, deposition rates have remained high, but sediment fingerprinting indicates yet another significant shift back to near-channel sources. On-going changes in basin hydrology, from both installation of agricultural drainage systems and on-going climate change have put more water in the rivers, increasing rates of near-channel bank and bluff erosion. This most recent shift in sediment sources has significant implications for turbidity management in the Minnesota River basin.

Gran, Karen; Belmont, Patrick; Finnegan, Noah

2013-04-01

53

Deep inelastic cross-section measurements at large y with the ZEUS detector at HERA  

E-print Network

The reduced cross sections for $e^{+}p$ deep inelastic scattering have been measured with the ZEUS detector at HERA at three different centre-of-mass energies, $318$, $251$ and $225$ GeV. The cross sections, measured double differentially in Bjorken $x$ and the virtuality, $Q^2$, were obtained in the region $0.13\\ \\leq\\ y\\ \\leq\\ 0.75$, where $y$ denotes the inelasticity and $5\\ \\leq\\ Q^2\\ \\leq\\ 110$ GeV$^2$. The proton structure functions $F_2$ and $F_L$ were extracted from the measured cross sections.

ZEUS Collaboration; H. Abramowicz; I. Abt; L. Adamczyk; M. Adamus; R. Aggarwal; S. Antonelli; O. Arslan; V. Aushev; Y. Aushev; O. Bachynska; A. N. Barakbaev; N. Bartosik; O. Behnke; J. Behr; U. Behrens; A. Bertolin; S. Bhadra; I. Bloch; V. Bokhonov; E. G. Boos; K. Borras; I. Brock; R. Brugnera; A. Bruni; B. Brzozowska; P. J. Bussey; A. Caldwell; M. Capua; C. D. Catterall; J. Chwastowski; J. Ciborowski; R. Ciesielski; A. M. Cooper-Sarkar; M. Corradi; F. Corriveau; G. D'Agostini; R. K. Dementiev; R. C. E. Devenish; G. Dolinska; V. Drugakov; S. Dusini; J. Ferrando; J. Figiel; B. Foster; G. Gach; A. Garfagnini; A. Geiser; A. Gizhko; L. K. Gladilin; O. Gogota; Yu. A. Golubkov; J. Grebenyuk; I. Gregor; G. Grzelak; O. Gueta; M. Guzik; W. Hain; G. Hartner; D. Hochman; R. Hori; Z. A. Ibrahim; Y. Iga; M. Ishitsuka; A. Iudin; F. Januschek; I. Kadenko; S. Kananov; T. Kanno; U. Karshon; M. Kaur; P. Kaur; L. A. Khein; D. Kisielewska; R. Klanner; U. Klein; N. Kondrashova; O. Kononenko; Ie. Korol; I. A. Korzhavina; A. Kotanski; U. Kotz; N. Kovalchuk; H. Kowalski; O. Kuprash; M. Kuze; B. B. Levchenko; A. Levy; V. Libov; S. Limentani; M. Lisovyi; E. Lobodzinska; W. Lohmann; B. Lohr; E. Lohrmann; A. Longhin; D. Lontkovskyi; O. Yu. Lukina; J. Maeda; I. Makarenko; J. Malka; J. F. Martin; S. Mergelmeyer; F. Mohamad Idris; K. Mujkic; V. Myronenko; K. Nagano; A. Nigro; T. Nobe; D. Notz; R. J. Nowak; K. Olkiewicz; Yu. Onishchuk; E. Paul; W. Perlanski; H. Perrey; N. S. Pokrovskiy; A. S. Proskuryakov; M. Przybycien; A. Raval; P. Roloff; I. Rubinsky; M. Ruspa; V. Samojlov; D. H. Saxon; M. Schioppa; W. B. Schmidke; U. Schneekloth; T. Schorner-Sadenius; J. Schwartz; L. M. Shcheglova; R. Shevchenko; O. Shkola; I. Singh; I. O. Skillicorn; W. Slominski; V. Sola; A. Solano; A. Spiridonov; L. Stanco; N. Stefaniuk; A. Stern; T. P. Stewart; P. Stopa; J. Sztuk-Dambietz; D. Szuba; J. Szuba; E. Tassi; T. Temiraliev; K. Tokushuku; J. Tomaszewska; A. Trofymov; V. Trusov; T. Tsurugai; M. Turcato; O. Turkot; T. Tymieniecka; A. Verbytskyi; O. Viazlo; R. Walczak; W. A. T. Wan Abdullah; K. Wichmann; M. Wing; G. Wolf; S. Yamada; Y. Yamazaki; N. Zakharchuk; A. F. Zarnecki; L. Zawiejski; O. Zenaiev; B. O. Zhautykov; N. Zhmak; D. S. Zotkin

2014-04-25

54

Deep inelastic cross-section measurements at large y with the ZEUS detector at HERA  

NASA Astrophysics Data System (ADS)

The reduced cross sections for e+p deep inelastic scattering have been measured with the ZEUS detector at HERA at three different center-of-mass energies, 318, 251 and 225 GeV. The cross sections, measured double differentially in Bjorken x and the virtuality, Q2, were obtained in the region 0.13?y ?0.75, where y denotes the inelasticity and 5?Q2?110 GeV2. The proton structure functions F2 and FL were extracted from the measured cross sections.

Abramowicz, H.; Abt, I.; Adamczyk, L.; Adamus, M.; Aggarwal, R.; Antonelli, S.; Arslan, O.; Aushev, V.; Aushev, Y.; Bachynska, O.; Barakbaev, A. N.; Bartosik, N.; Behnke, O.; Behr, J.; Behrens, U.; Bertolin, A.; Bhadra, S.; Bloch, I.; Bokhonov, V.; Boos, E. G.; Borras, K.; Brock, I.; Brugnera, R.; Bruni, A.; Brzozowska, B.; Bussey, P. J.; Caldwell, A.; Capua, M.; Catterall, C. D.; Chwastowski, J.; Ciborowski, J.; Ciesielski, R.; Cooper-Sarkar, A. M.; Corradi, M.; Corriveau, F.; D'Agostini, G.; Dementiev, R. K.; Devenish, R. C. E.; Dolinska, G.; Drugakov, V.; Dusini, S.; Ferrando, J.; Figiel, J.; Foster, B.; Gach, G.; Garfagnini, A.; Geiser, A.; Gizhko, A.; Gladilin, L. K.; Gogota, O.; Golubkov, Yu. A.; Grebenyuk, J.; Gregor, I.; Grzelak, G.; Gueta, O.; Guzik, M.; Hain, W.; Hartner, G.; Hochman, D.; Hori, R.; Ibrahim, Z. A.; Iga, Y.; Ishitsuka, M.; Iudin, A.; Januschek, F.; Kadenko, I.; Kananov, S.; Kanno, T.; Karshon, U.; Kaur, M.; Kaur, P.; Khein, L. A.; Kisielewska, D.; Klanner, R.; Klein, U.; Kondrashova, N.; Kononenko, O.; Korol, Ie.; Korzhavina, I. A.; Kota?ski, A.; Ktz, U.; Kovalchuk, N.; Kowalski, H.; Kuprash, O.; Kuze, M.; Levchenko, B. B.; Levy, A.; Libov, V.; Limentani, S.; Lisovyi, M.; Lobodzinska, E.; Lohmann, W.; Lhr, B.; Lohrmann, E.; Longhin, A.; Lontkovskyi, D.; Lukina, O. Yu.; Maeda, J.; Makarenko, I.; Malka, J.; Martin, J. F.; Mergelmeyer, S.; Mohamad Idris, F.; Mujkic, K.; Myronenko, V.; Nagano, K.; Nigro, A.; Nobe, T.; Notz, D.; Nowak, R. J.; Olkiewicz, K.; Onishchuk, Yu.; Paul, E.; Perla?ski, W.; Perrey, H.; Pokrovskiy, N. S.; Proskuryakov, A. S.; Przybycie?, M.; Raval, A.; Roloff, P.; Rubinsky, I.; Ruspa, M.; Samojlov, V.; Saxon, D. H.; Schioppa, M.; Schmidke, W. B.; Schneekloth, U.; Schrner-Sadenius, T.; Schwartz, J.; Shcheglova, L. M.; Shevchenko, R.; Shkola, O.; Singh, I.; Skillicorn, I. O.; S?omi?ski, W.; Sola, V.; Solano, A.; Spiridonov, A.; Stanco, L.; Stefaniuk, N.; Stern, A.; Stewart, T. P.; Stopa, P.; Sztuk-Dambietz, J.; Szuba, D.; Szuba, J.; Tassi, E.; Temiraliev, T.; Tokushuku, K.; Tomaszewska, J.; Trofymov, A.; Trusov, V.; Tsurugai, T.; Turcato, M.; Turkot, O.; Tymieniecka, T.; Verbytskyi, A.; Viazlo, O.; Walczak, R.; Wan Abdullah, W. A. T.; Wichmann, K.; Wing, M.; Wolf, G.; Yamada, S.; Yamazaki, Y.; Zakharchuk, N.; ?arnecki, A. F.; Zawiejski, L.; Zenaiev, O.; Zhautykov, B. O.; Zhmak, N.; Zotkin, D. S.; ZEUS Collaboration

2014-10-01

55

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

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

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

2003-01-01

56

Analysis of the initial Zeus critical condition with MCNP and ENDF/B-VI  

SciTech Connect

The Zeus experiment was designed to test the adequacy of {sup 235}U cross sections in the intermediate-energy range. For its initial configuration, the core contains thin, circular platters of highly enriched uranium (HEU) separated by similar platters of graphite. The cylindrical core is reflected by copper pieces shaped to produce a parallelepiped. Zeus achieved initial criticality on April 26, with ten HEU platters and an axial loading that is almost symmetrical. The critical configuration had 4 cm of graphite above the top HEU platter, 4 cm of graphite below the bottom HEU platter, and 8 cm of graphite between all but two adjacent HEU platters. The fourth and fifth platters, counting from the bottom, were separated by 6.5 cm of graphite and 60 mils (0.1524 cm) of aluminum. The aluminum shim was required because Zeus currently has an operating limit of 10{cents} of excess reactivity. A schematic of this configuration is shown. This configuration actually was very slightly supercritical, with a period of {approximately}1,100 s. This period corresponds to {approximately}1{cents} of excess reactivity and therefore to a value of k{sub eff} between 1.0000 and 1.0001. For practical applications, therefore, the configuration can be considered to be exactly critical. A detailed MCNP model of the critical configuration was constructed, as were models for two slightly subcritical configurations. Prior to achieving criticality, measurements had been made for two very similar but slightly subcritical configurations. The first subcritical configuration had 8 cm of graphite between all adjacent HEU platters, while the second had only 7 cm between the fourth and fifth platters (but 8 cm between all others). Calculations were performed with MCNP4XS, a version of the MCNP Monte Carlo code that is intermediate between MCNP4B and the forthcoming MCNP4C, and a cross-section library derived from release 4 of ENDF/B-VI. These results show the incremental increase in reactivity from one configuration to the next, and the reactivity changes correspond quite well with the estimated subcritical margins. However, there is a bias of {approximately}0.01 {Delta}k in the calculated values for k{sub eff}.

Mosteller, R.D.; Jaegers, P.J.

1999-07-01

57

Measurement of D production in deep inelastic ep scattering with the ZEUS detector at HERA  

NASA Astrophysics Data System (ADS)

Charm production in deep inelastic ep scattering was measured with the ZEUS detector using an integrated luminosity of 354 pb-1. Charm quarks were identified by reconstructing D mesons in the D ? K ??? decay channel. Lifetime information was used to reduce combinatorial background substantially. Differential cross sections were measured in the kinematic region 5 < Q 2 < 1000 GeV2, 0 .02 < y < 0 .7, 1 .5 < p T ( D ) < 15 GeV and | ?( D )| < 1 .6, where Q 2 is the photon virtuality, y is the inelasticity, and p T ( D ) and ?( D ) are the transverse momentum and the pseudorapidity of the D meson, respectively. Next-to-leading-order QCD predictions are compared to the data. The charm contribution, F_2^{{coverline{c}}} , to the proton structure-function F 2 was extracted.

Abramowicz, H.; Abt, I.; Adamczyk, L.; Adamus, M.; Aggarwal, R.; Antonelli, S.; Antonioli, P.; Antonov, A.; Arneodo, M.; Arslan, O.; Aushev, V.; Aushev, Y.; Bachynska, O.; Bamberger, A.; Barakbaev, A. N.; Barbagli, G.; Bari, G.; Barreiro, F.; Bartosik, N.; Bartsch, D.; Basile, M.; Behnke, O.; Behr, J.; Behrens, U.; Bellagamba, L.; Bertolin, A.; Bhadra, S.; Bindi, M.; Blohm, C.; Bokhonov, V.; Bold, T.; Boos, E. G.; Borras, K.; Boscherini, D.; Bot, D.; Brock, I.; Brownson, E.; Brugnera, R.; Brmmer, N.; Bruni, A.; Bruni, G.; Brzozowska, B.; Bussey, P. J.; 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.; Corso, F. Dal; del Peso, J.; Dementiev, R. K.; De Pasquale, S.; Derrick, M.; Devenish, R. C. E.; Dobur, D.; Dolgoshein, B. A.; Dolinska, G.; 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.; Foster, B.; Gach, G.; Galas, A.; Gallo, E.; Garfagnini, A.; Geiser, A.; Gialas, I.; Gizhko, A.; Gladilin, L. K.; Gladkov, D.; Glasman, C.; Gogota, O.; Golubkov, Yu. A.; Gttlicher, P.; Grabowska-Bold, I.; Grebenyuk, J.; Gregor, I.; Grigorescu, G.; Grzelak, G.; Gueta, O.; Guzik, M.; Gwenlan, C.; Haas, T.; Hain, W.; Hamatsu, R.; Hart, J. C.; Hartmann, H.; Hartner, G.; Hilger, E.; Hochman, D.; Hori, R.; Httmann, A.; Ibrahim, Z. A.; Iga, Y.; Ingbir, R.; Ishitsuka, M.; Iudin, A.; Jakob, H.-P.; Januschek, F.; Jones, T. W.; Jngst, M.; Kadenko, I.; Kahle, 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.; Kondrashova, N.; Kononenko, O.; Kooijman, P.; Korol, Ie.; Korzhavina, I. A.; Kotanski, A.; Ktz, U.; Kovalchuk, N.; Kowalski, H.; Kuprash, O.; Kuze, M.; Lee, A.; Levchenko, B. B.; Levy, A.; Libov, V.; Limentani, S.; Ling, T. Y.; Lisovyi, M.; Lobodzinska, E.; Lohmann, W.; Lhr, B.; Lohrmann, E.; Long, K. R.; Longhin, A.; Lontkovskyi, D.; Lukina, O. Yu.; Maeda, J.; Magill, S.; Makarenko, I.; Malka, J.; Mankel, R.; Margotti, A.; Marini, G.; Martin, J. F.; Mastroberardino, A.; Mattingly, M. C. K.; Melzer-Pellmann, I.-A.; Mergelmeyer, S.; Miglioranzi, S.; Idris, F. Mohamad; Monaco, V.; Montanari, A.; Morris, J. D.; Mujkic, K.; Musgrave, B.; Nagano, K.; Namsoo, T.; Nania, R.; Nigro, A.; Ning, Y.; Nobe, T.; Notz, D.; Nowak, R. J.; Nuncio-Quiroz, A. E.; Oh, B. Y.; Okazaki, N.; Olkiewicz, K.; Onishchuk, Yu.; 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.; Przybycien, M.; Raval, A.; Reeder, D. D.; Reisert, B.; Ren, Z.; Repond, J.; Ri, Y. D.; Robertson, A.; Roloff, P.; Rubinsky, I.; Ruspa, M.; Sacchi, R.; Samson, U.; Sartorelli, G.; Savin, A. A.; Saxon, D. H.; Schioppa, M.; Schlenstedt, S.; Schleper, P.; Schmidke, W. B.; Schneekloth, U.; Schnberg, V.; Schrner-Sadenius, T.; Schwartz, J.; Sciulli, F.; Shcheglova, L. M.; Shehzadi, R.; Shimizu, S.; Singh, I.; Skillicorn, I. O.; Slominski, W.; Smith, W. H.; Sola, V.; Solano, A.; Son, D.; Sosnovtsev, V.; Spiridonov, A.; Stadie, H.; Stanco, L.; Stefaniuk, N.; Stern, A.; Stewart, T. P.; Stifutkin, A.; Stopa, P.; Suchkov, S.; Susinno, G.; Suszycki, L.; Sztuk-Dambietz, J.; Szuba, D.; Szuba, J.; Tapper, A. D.; Tassi, E.; Terrn, J.; Theedt, T.; Tiecke, H.; Tokushuku, K.; Tomaszewska, J.; Trofymov, A.; Trusov, V.; Tsurugai, T.; Turcato, M.; Turkot, O.; Tymieniecka, T.; Vzquez, M.; Verbytskyi, A.; Viazlo, O.; Vlasov, N. N.; Walczak, R.; Abdullah, W. A. T. Wan; Whitmore, J. J.; Wichmann, K.; Wiggers, L.; Wing, M.; Wlasenko, M.; Wolf, G.; Wolfe, H.; Wrona, K.; Yages-Molina, A. G.; Yamada, S.; Yamazaki, Y.; Yoshida, R.; Youngman, C.; Zakharchuk, N.; ?arnecki, A. F.; Zawiejski, L.; Zenaiev, O.; Zeuner, W.; Zhautykov, B. O.; Zhmak, N.; Zichichi, A.; Zolkapli, Z.; Zotkin, D. S.

2013-05-01

58

Sex-role reversed nuptial feeding reduces male kleptoparasitism of females in Zeus bugs (Heteroptera; Veliidae).  

PubMed

Males of a variety of taxa occasionally steal food secured by their mates. In some spiders and insects, males rely entirely on this form of intraspecific kleptoparasitism for their subsistence. However, this male strategy may be costly for females and a variety of different female counteradaptations have been proposed. In Zeus bugs (Phoreticovelia spp.), males ride on the back of their mates for extended periods and females produce a gland secretion that males feed on. By experimentally occluding the dorsal glands in females and varying food availability, we show that nuptial feeding by females reduces the extent to which the males kleptoparasitize their mates. We suggest that females have, at least in part, evolved this unique form of nuptial feeding as a counteradaptation to reduce the rate of kleptoparasitism by males. PMID:17148270

Arnqvist, Gran; Jones, Thersa M; Elgar, Mark A

2006-12-22

59

Sex-role reversed nuptial feeding reduces male kleptoparasitism of females in Zeus bugs (Heteroptera; Veliidae)  

PubMed Central

Males of a variety of taxa occasionally steal food secured by their mates. In some spiders and insects, males rely entirely on this form of intraspecific kleptoparasitism for their subsistence. However, this male strategy may be costly for females and a variety of different female counteradaptations have been proposed. In Zeus bugs (Phoreticovelia spp.), males ride on the back of their mates for extended periods and females produce a gland secretion that males feed on. By experimentally occluding the dorsal glands in females and varying food availability, we show that nuptial feeding by females reduces the extent to which the males kleptoparasitize their mates. We suggest that females have, at least in part, evolved this unique form of nuptial feeding as a counteradaptation to reduce the rate of kleptoparasitism by males. PMID:17148270

Arnqvist, Goran; Jones, Theresa M; Elgar, Mark A

2006-01-01

60

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)  

NASA Astrophysics Data System (ADS)

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 50C during discrete episodes at 1005 Ma, 604 Ma, and 243 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 110C 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 604 Ma, 463 Ma, 352 Ma, and 243 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.

O'Sullivan, Paul B.; Murphy, John M.; Blythe, Ann E.

1997-01-01

61

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

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.

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

1997-01-01

62

Makin' Tracks  

NSDL National Science Digital Library

In this activity, learners make plaster casts of an animal track to learn more about animals and animal behavior. Learners can use real animal tracks found outdoors or rubber track molds if conducted indoors. This lesson guide includes discussion questions, extensions/simplifications, and helpful hints.

Huff, Paula R.

2005-01-01

63

Probing star formation at low and high redshift with ZEUS, a new submillimeter grating spectrometer  

NASA Astrophysics Data System (ADS)

We have detected emission in the J = 6 [arrow right] 5 transition (l = 453 mm) of the carbon monoxide isotopologue 13 CO from the starburst nucleus of the nearby galaxy NGC 253. This is the first extragalactic detection of this transition, which traces the warm, dense molecular gas found in regions of massive star formation. An excitation analysis of the CO line strengths measured here and obtained from the literature finds that [approximate] 35%-60% of the molecular gas mass ([Special characters omitted.] [approximate] 2.9 10^7 [Special characters omitted.] ) in the nuclear region is both warm ( T ~ 110 K) and dense ([Special characters omitted.] ~ 10 4 cm -3 ). We find that the gas is most likely heated either by an elevated density of cosmic rays, or by the dissipation of supersonic turbulence. As both of these heat sources are the result of stellar feedback within the starburst, our analysis suggests that the starburst may be self-limiting. We also present the detection of emission in the 2 P 3/2 [arrow right] 2 P 1/ 2 transition (l = 158 mm) of ionized carbon from MIPS J142824.0+352619, an extremely luminous star-forming galaxy at z = 1.325. We combine this measurement with existing observations of the far-infrared continuum and CO emission to estimate that the bulk of the molecular gas in this galaxy is dense ([Special characters omitted.] ~ 10 4 cm -3 ), and is illuminated by an ambient far-ultraviolet radiation field ~ 1000 times more intense than the mean field measured in our Galaxy. These are similar conditions as experienced by the molecular gas in the starburst nuclei of nearby galaxies, and suggests that this source may be modeled as a scaled-up version of a starburst nucleus. The large star formation rate and molecular gas reservoir indicate that MIPS J142824.0+352619 is likely the progenitor of one of the population of massive elliptical galaxies seen in the local Universe. These observations were made with ZEUS, a new direct-detection grating spectrometer operating at the Caltech Submillimeter Observatory. ZEUS is a broad-band spectrometer providing a resolving power of l/Dl ~ 1000 across the 350 mm and 450 mm telluric windows. It uses a 1 32 semiconductor bolometer array oriented along the dispersion direction, and is configured to simultaneously provide a 16 pixel spectrum covering Dn ~ 10 GHz in each of the two windows. The current sensitivity is within a factor of [approximate] 1.2 and [approximate] 1.3 of the background photon limit at the centers of the 350 mm and 450 mm bands, respectively, and this superb sensitivity coupled with the large instantaneous bandwidth make ZEUS an excellent tool for the observation of extragalactic spectral lines. Here we describe the design, construction, characterization, and implementation of this new instrument.

Hailey-Dunsheath, Steven

2009-06-01

64

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.

65

Hurricane Tracking  

NSDL National Science Digital Library

This homework assignment is given in the first two weeks of class. Students receive one or two lectures that cover the topics of atmospheric layers, temperature and pressure profiles, concepts of atmospheric mass and pressure and measuring (i.e. dropsonde) instrumentation. At the beginning of each lecture I briefly show them the tropical update from the NOAA National Hurricane Center web site; if there is an active storm, I show where I go to get more info, such as the projected storm track and storm history (for example, from Intellicast Hurricane Tracking). Then, for this assignment, I reintroduce them to these hurricane information web sites and demonstrate how to find the historical data on tropical storms (such as from the Unisys Hurricane Data Archive), and how to copy and paste text data into word and/or excel, as a tab- or space-delimited file. I point out some problem areas with this data-grabbing method, such as headers that get lost from their associated data column or date information that may not format as dates. I then hand out the assignment, which asks them to: Find data on a current or recent (this year) tropical system, provide the name and year of the storm and the reference web site, and plot the wind speed and pressure variables against time. Students should label the axes and give a descriptive title to the chart. Describe what they notice in the graphed data and if it seems believable (this allows students to decide if they have done the task correctly by using their understanding of the data). Predict what will happen if the storm a) intensifies or b) weakens. I then provide another data set (of any long-duration tropical storm that formed, weakened and later re-intensified) and ask them to go through the same process of plotting and interpretation. I tell them that some future climate predictions are for more storms with lower central pressures and ask which of the two charts best represents that future scenario, and why.

Doner, Lisa

66

SPATIAL TRACK TRANSITION EFFECTS FOR HEADPHONE LISTENING  

Microsoft Academic Search

In this paper we study the use of different spatial processing tech- niques to create audio effects for forced transitions between music tracks in headphone listening. The audio effect encompasses a movement of the initially playing track to the side of the listener while the next track to be played moves into a central position si- multaneously. We compare seven

Aki Hrm; Steven van de Par

2007-01-01

67

Track reconstruction at the ILC: the ILD tracking software  

NASA Astrophysics Data System (ADS)

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.

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

2014-06-01

68

New apatite fission-track data reflecting the landscape evolution using the example of the southeastern passive continental margin in Central Brazil  

Microsoft Academic Search

Low-temperature thermochronolgy like AFT yield a well established tool to understand and reconstruct the rift to post-rift evolution of the passive continental margin in Brazil. The aim of the study is to quantify the temperature, exhumation, uplift, and long-term dynamic evolution of the topography of the southeastern passive continental margin in the states of Paran and Santa Catarina (Central Brazil)

Markus Karl; Ulrich A. Glasmacher; Peter C. Hackspacher; Ana O. B. Franco-Magalhaes

2010-01-01

69

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

Microsoft Academic Search

Major and trace elements, minerals, and grain-size were analysed from the early to mid-Holocene (12 to 4ky BP) period of\\u000a a sediment core from the Alpine lake Oberer Landschitzsee (ObLAN, 2076m 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

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

2006-01-01

70

Fraction Track  

NSDL National Science Digital Library

"This applet allows students to individually practice working with relationships among fractions and ways of combining fractions. For a two person version of this applet see the Fraction Track E-Example." from NCTM Illuminations.

Mathematics, Illuminations N.

2009-05-12

71

Particle Tracks  

Microsoft Academic Search

Particle tracks are sequences of adjacent position measurements caused by subatomic particles. As quantum phenomena to which\\u000a the particle picture applies (? FranckHertz experiment), they constitute the empirical basis of ? particle physics. The dynamic\\u000a properties of the underlying particles are measured by means of a semi-classical measurement theory. The generation of particle\\u000a tracks, however, is explained in the wave

Brigitte Falkenburg

72

Transit Tracks  

NSDL National Science Digital Library

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, Keplers 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.

Science, Lawrence H.

2008-01-01

73

Number Track  

NSDL National Science Digital Library

Students can use this interactive Flash applet to practice ordering whole numbers within 20. The applet displays a track and number tiles, which the user drags to create the correct sequence of numbers 1 through 20. Users may choose from four levels: place 5 missing numbers, place 10 numbers, arrange all 20 numbers, or create your own challenge.

Bunker, Dan

2010-01-01

74

Measurement of neutral current ep cross sections at high Bjorken x with the ZEUS detector  

NASA Astrophysics Data System (ADS)

The neutral current ep cross section has been measured up to values of Bjorken x ?1 with the ZEUS detector at HERA using an integrated luminosity of 187 pb-1 of e-p and 142 pb-1 of e+p collisions at ?s =318 GeV. Differential cross sections in x and Q2, the exchanged boson virtuality, are presented for Q2?725 GeV2. An improved reconstruction method and greatly increased amount of data allows a finer binning in the high-x region of the neutral current cross section and leads to a measurement with much improved precision compared to a similar earlier analysis. The measurements are compared to Standard Model expectations based on a variety of recent parton distribution functions.

Abramowicz, H.; Abt, I.; Adamczyk, L.; Adamus, M.; Aggarwal, R.; Antonelli, S.; Arslan, O.; Aushev, V.; Aushev, Y.; Bachynska, O.; Barakbaev, A. N.; Bartosik, N.; Behnke, O.; Behr, J.; Behrens, U.; Bertolin, A.; Bhadra, S.; Bloch, I.; Bokhonov, V.; Boos, E. G.; Borras, K.; Brock, I.; Brugnera, R.; Bruni, A.; Brzozowska, B.; Bussey, P. J.; Caldwell, A.; Capua, M.; Catterall, C. D.; Chwastowski, J.; Ciborowski, J.; Ciesielski, R.; Cooper-Sarkar, A. M.; Corradi, M.; Corriveau, F.; D'Agostini, G.; Dementiev, R. K.; Devenish, R. C. E.; Dolinska, G.; Drugakov, V.; Dusini, S.; Ferrando, J.; Figiel, J.; Foster, B.; Gach, G.; Garfagnini, A.; Geiser, A.; Gizhko, A.; Gladilin, L. K.; Gogota, O.; Golubkov, Yu. A.; Grebenyuk, J.; Gregor, I.; Grzelak, G.; Gueta, O.; Guzik, M.; Hain, W.; Hartner, G.; Hochman, D.; Hori, R.; Ibrahim, Z. A.; Iga, Y.; Ishitsuka, M.; Iudin, A.; Januschek, F.; Kadenko, I.; Kananov, S.; Kanno, T.; Karshon, U.; Kaur, M.; Kaur, P.; Khein, L. A.; Kisielewska, D.; Klanner, R.; Klein, U.; Kondrashova, N.; Kononenko, O.; Korol, Ie.; Korzhavina, I. A.; Kota?ski, A.; Ktz, U.; Kovalchuk, N.; Kowalski, H.; Kuprash, O.; Kuze, M.; Levchenko, B. B.; Levy, A.; Libov, V.; Limentani, S.; Lisovyi, M.; Lobodzinska, E.; Lohmann, W.; Lhr, B.; Lohrmann, E.; Longhin, A.; Lontkovskyi, D.; Lukina, O. Yu.; Maeda, J.; Makarenko, I.; Malka, J.; Martin, J. F.; Mergelmeyer, S.; Mohamad Idris, F.; Mujkic, K.; Myronenko, V.; Nagano, K.; Nigro, A.; Nobe, T.; Notz, D.; Nowak, R. J.; Olkiewicz, K.; Onishchuk, Yu.; Paul, E.; Perla?ski, W.; Perrey, H.; Pokrovskiy, N. S.; Proskuryakov, A. S.; Przybycie?, M.; Raval, A.; Roloff, P.; Rubinsky, I.; Ruspa, M.; Samojlov, V.; Saxon, D. H.; Schioppa, M.; Schmidke, W. B.; Schneekloth, U.; Schrner-Sadenius, T.; Schwartz, J.; Shcheglova, L. M.; Shevchenko, R.; Shkola, O.; Singh, I.; Skillicorn, I. O.; S?omi?ski, W.; Sola, V.; Solano, A.; Spiridonov, A.; Stanco, L.; Stefaniuk, N.; Stern, A.; Stewart, T. P.; Stopa, P.; Sztuk-Dambietz, J.; Szuba, D.; Szuba, J.; Tassi, E.; Temiraliev, T.; Tokushuku, K.; Tomaszewska, J.; Trofymov, A.; Trusov, V.; Tsurugai, T.; Turcato, M.; Turkot, O.; Tymieniecka, T.; Verbytskyi, A.; Viazlo, O.; Walczak, R.; Wan Abdullah, W. A. T.; Wichmann, K.; Wing, M.; Wolf, G.; Yamada, S.; Yamazaki, Y.; Zakharchuk, N.; ?arnecki, A. F.; Zawiejski, L.; Zenaiev, O.; Zhautykov, B. O.; Zhmak, N.; Zotkin, D. S.; ZEUS Collaboration

2014-04-01

75

Measurement of neutral current e+/-p cross sections at high Bjorken x with the ZEUS detector  

E-print Network

The neutral current e+/-p cross section has been measured up to values of Bjorken x of approximately 1 with the ZEUS detector at HERA using an integrated luminosity of 187 inv. pb of e-p and 142 inv. pb of e+p collisions at sqrt(s) = 318GeV. Differential cross sections in x and Q2, the exchanged boson virtuality, are presented for Q2 geq 725GeV2. An improved reconstruction method and greatly increased amount of data allows a finer binning in the high-x region of the neutral current cross section and leads to a measurement with much improved precision compared to a similar earlier analysis. The measurements are compared to Standard Model expectations based on a variety of recent parton distribution functions.

ZEUS Collaboration; H. Abramowicz; I. Abt; L. Adamczyk; M. Adamus; R. Aggarwal; S. Antonelli; O. Arslan; V. Aushev; Y. Aushev; O. Bachynska; A. N. Barakbaev; N. Bartosik; O. Behnke; J. Behr; U. Behrens; A. Bertolin; S. Bhadra; I. Bloch; V. Bokhonov; E. G. Boos; K. Borras; I. Brock; R. Brugnera; A. Bruni; B. Brzozowska; P. J. Bussey; A. Caldwell; M. Capua; C. D. Catterall; J. Chwastowski; J. Ciborowski; R. Ciesielski; A. M. Cooper-Sarkar; M. Corradi; F. Corriveau; G. D Agostini; R. K. Dementiev; R. C. E. Devenish; G. Dolinska; V. Drugakov; S. Dusini; J. Ferrando; J. Figiel; B. Foster; G. Gach; A. Garfagnini; A. Geiser; A. Gizhko; L. K. Gladilin; O. Gogota; Yu. A. Golubkov; J. Grebenyuk; I. Gregor; G. Grzelak; O. Gueta; M. Guzik; W. Hain; G. Hartner; D. Hochman; R. Hori; Z. A. Ibrahim; Y. Iga; M. Ishitsuka; A. Iudin; F. Januschek; I. Kadenko; S. Kananov; T. Kanno; U. Karshon; M. Kaur; P. Kaur; L. A. Khein; D. Kisielewska; R. Klanner; U. Klein; N. Kondrashova; O. Kononenko; Ie. Korol; I. A. Korzhavina; A. Kotanski; U. Koetz; N. Kovalchuk; H. Kowalski; O. Kuprash; M. Kuze; B. B. Levchenko; A. Levy; V. Libov; S. Limentani; M. Lisovyi; E. Lobodzinska; W. Lohmann; B. Loehr; E. Lohrmann; A. Longhin; D. Lontkovskyi; O. Yu. Lukina; J. Maeda; I. Makarenko; J. Malka; J. F. Martin; S. Mergelmeyer; F. Mohamad Idris; K. Mujkic; V. Myronenko; K. Nagano; A. Nigro; T. Nobe; D. Notz; R. J. Nowak; K. Olkiewicz; Yu. Onishchuk; E. Paul; W. Perlanski; H. Perrey; N. S. Pokrovskiy; A. S. Proskuryakov; M. Przybycien; A. Raval; P. Roloff; I. Rubinsky; M. Ruspa; V. Samojlov; D. H. Saxon; M. Schioppa; W. B. Schmidke; U. Schneekloth; T. Schoerner-Sadenius; J. Schwartz; L. M. Shcheglova; R. Shevchenko; O. Shkola; I. Singh; I. O. Skillicorn; W. Slominski; V. Sola; A. Solano; A. Spiridonov; L. Stanco; N. Stefaniuk; A. Stern; T. P. Stewart; P. Stopa; J. Sztuk-Dambietz; D. Szuba; J. Szuba; E. Tassi; T. Temiraliev; K. Tokushuku; J. Tomaszewska; A. Trofymov; V. Trusov; T. Tsurugai; M. Turcato; O. Turkot; T. Tymieniecka; A. Verbytskyi; O. Viazlo; R. Walczak; W. A. T. Wan Abdullah; K. Wichmann; M. Wing; G. Wolf; S. Yamada; Y. Yamazaki; N. Zakharchuk; A. F. Zarnecki; L. Zawiejski; O. Zenaiev; B. O. Zhautykov; N. Zhmak; D. S. Zotkin

2013-12-16

76

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

NASA Astrophysics Data System (ADS)

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.

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.; Brmmer, 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.; Gttlicher, 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.; Httmann, A.; Iacobucci, G.; Ibrahim, Z. A.; Iga, Y.; Ingbir, R.; Ishitsuka, M.; Jakob, H.-P.; Januschek, F.; Jimenez, M.; Jones, T. W.; Jngst, 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.; Ktz, 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.; Lhr, 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.; Schnberg, V.; Schrner-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.; Terrn, J.; Theedt, T.; Tiecke, H.; Tokushuku, K.; Tomalak, O.; Tomaszewska, J.; Tsurugai, T.; Turcato, M.; Tymieniecka, T.; Uribe-Estrada, C.; Vzquez, 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.; Yages-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

77

Sun tracking solar energy collector  

Microsoft Academic Search

A parabolic reflector is supported so that it can track the sun. The support for this reflector comprises an azimuth frame supported on two wheels and a central pivotal point which are positioned in a substantially triangular configuration. On top of the azimuth frame, there is provided an elevation frame. The reflector rides on wheels captured within curved rails. The

G. S. Perkins

1978-01-01

78

Historical Hurricane Tracks  

NSDL National Science Digital Library

The Historical Hurricane Tracks tool is an interactive mapping application that allows you to easily search and display Atlantic Basin and East-Central Pacific Basin tropical cyclone data. At this web site you can learn about historical tropical cyclones occurring in different areas located throughout the Atlantic, Caribbean, and Gulf of Mexico. The web site provides information about U.S. coastal county population versus hurricane strikes as well as links to various Internet resources focusing on tropical cyclones. The interactive mapping application allows you to search the National Hurricane Center historical tropical cyclone database and graphically display storms affecting your area since 1851.

2010-11-18

79

Fraction Tracks  

NSDL National Science Digital Library

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.

Boston, Wgbh

1996-01-01

80

Turtle Tracks  

NSDL National Science Digital Library

"One way to describe a geometric figure is in terms of the path generated by a moving point. Using the computer language LOGO, children can produce a list of commands to govern the motion of a 'turtle' and trace out a geometric track on the computer screen. Such a turtle can be programmed to generate an endless variety of patterns. Mathematicians can use similar algorithms to generate fractals and other forms. Certain sequences of moves produce patterns known as spirolaterals, which generate artistic forms of unexpected complexity and beauty, and can serve as idea generators for architects..."

Peterson, Ivars

2007-04-04

81

Making Tracks  

NSDL National Science Digital Library

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.

Greb, Stephen

82

Boulder Track  

NASA Technical Reports Server (NTRS)

MGS MOC Release No. MOC2-408, 1 July 2003

If a boulder rolls down a slope on an uninhabited planet, does it make a sound? While we do not know the sound made by a boulder rolling down a slope in the martian region of Gordii Dorsum, we do know that it made an impression. This full-resolution Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a series of depressions made on a dust-mantled slope as a boulder rolled down it, sometime in the recent past. The boulder track is located just right of center in this picture. The boulder sits at the end of the track. This picture was acquired in May 2003; it is located near 11.2oN, 147.8oW. North is toward the lower left, sunlight illuminates the scene from the right. The picture covers an area only 810 meters (about 886 yards) across.

2003-01-01

83

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

NASA Astrophysics Data System (ADS)

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.

Davis, G. H.

2008-07-01

84

Ocean Tracks  

NSDL National Science Digital Library

How are marine animals moving around when they are deep below the ocean's surface? It's a fascinating question, and one that has driven the work of part of Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO). On this website, visitors can see the "tracks" of selected marine animals tagged by CSIRO and partner agencies. It's an amazing experience, and visitors just need to download a small plug-in to get started. Some of the marine animals here include white sharks patrolling Australia's southern coast and bluefin tuna on their oceanic migrations. The About area is a great way to learn about the research and technology involved with this complicated endeavor. Also, visitors can check out the low-tech/accessible version of the site if they are so inclined.

2013-02-08

85

Ocean Tracks  

NSDL National Science Digital Library

How are marine animals moving around when they are deep below the ocean's surface? It's a fascinating question, and one that has driven the work of part of Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO). On this website, visitors can see the "tracks" of selected marine animals tagged by CSIRO and partner agencies. It's an amazing experience, and visitors just need to download a small plug-in to get started. Some of the marine animals here include white sharks patrolling Australia's southern coast and bluefin tuna on their oceanic migrations. The About area is a great way to learn about the research and technology involved with this complicated endeavor. Also, visitors can check out the low-tech/accessible version of the site if they are so inclined.

86

Tracking system  

SciTech Connect

A system of tracking the sun each day of the year with compensation for changes in time of sunrise and time of sunset as well as sun declination on a day to day basis, declination being under control of a crank that makes one revolution per year. The equation of time is under control of a cam that also revolves once a year and resets the clock to reflect solar rather than mean solar time in order to properly follow the sun. The position of sun acquisition and loss are a function of the declination and the time is a function of the clock corrected via the cam for equation of time. Thus, when the declination is reset each day, it sets the position of acquisition and loss while the clock, now set for the change due to the equation of time, determines the time of acquisition and loss.

Leroy, V. A.; Gaedtke, H. D.

1985-10-15

87

On the Right Track.  

ERIC Educational Resources Information Center

Suggests thinking of "tracks" as clues and using them as the focus of outdoor activities in the urban environment. Provides 24 examples of possible track activities, including: seeds on the ground (track of a nearby tree), litter (track of a litterbug), and peeling paint (track of weathering forces). (JN)

Bieber, Ed

1983-01-01

88

Working Paper Series, 13 Zeus in Exile: Archaeological Restitution as Politics of Memory S.M. Can Bilsel  

E-print Network

Overshadowed by the debates on the Holocaust Memorial or the fate of the Berlin Wall, the reunification of archaeological collections in Berlin nevertheless poses an international problem. The question is, in a way, analogous to the current sensibilities about the future of memory, as it was called by a recent conference at Princeton University. How will the past will be framed and commemorated in a reunified Germany; what constitutes the cultural heritage of the new Berlin Republic? As Berlin assumes the role of the capital, both official and popular approaches to memory of the recent past gain a vital importance. Curiously, an internationally recognized effort on the part of the federal government to commemorate the victims of the Nazi regime goes hand in hand with a systematic repression of the more recent East German past. As the American-style malls and corporate headquarters of the Postdamer Platz, once the busiest center of Europe, celebrate the victors of the Cold War, the institutions of the East German Republic are being erased from the city. New Berlin will be a city of memory, as evident in its memorials and museums. Yet it will also remain a site of amnesia and forgetting. This paper will discuss Berlins contested Zeus Altar and its role as a collectively negotiated construct of memory. By reconsidering the Altar as an embodiment of memory, and not merely a cultural good, this paper

unknown authors

89

Purpose: Central Asia is an unfamiliar place to many people, and the countries, place names, and people can be hard to keep track of. This is quiz game designed to test and  

E-print Network

, and the countries, place names, and people can be hard to keep track of. This is quiz game designed to test and reinforce students' knowledge of the region. Post six categories: Three "easy," two "medium," and one "hard." See "Possible

Qian, Ning

90

A generalized information matrix fusion based heterogeneous track-to-track fusion algorithm  

NASA Astrophysics Data System (ADS)

The problem of Track-to-Track Fusion (T2TF) is very important for distributed tracking systems. It allows the use of the hierarchical fusion structure, where local tracks are sent to the fusion center (FC) as summaries of local information about the states of the targets, and fused to get the global track estimates. Compared to the centralized measurement-to-track fusion (CTF), the T2TF approach has low communication cost and is more suitable for practical implementation. Although having been widely investigated in the literature, most T2TF algorithms dealt with the fusion of homogenous tracks that have the same state of the target. However, in general, local trackers may use different motion models for the same target, and have different state spaces. This raises the problem of Heterogeneous Track-to-Track Fusion (HT2TF). In this paper, we propose the algorithm for HT2TF based on the generalized Information Matrix Fusion (GIMF) to handle the fusion of heterogenous tracks in the presence of possible communication delays. Compared to the fusion based on the LMMSE criterion, the proposed algorithm does not require the crosscovariance between the tracks for the fusion, which greatly simplify its implementation. Simulation results show that the proposed HT2TF algorithm has good consistency and fusion accuracy.

Tian, Xin; Bar-Shalom, Yaakov; Yuan, Ting; Blasch, Erik; Pham, Khanh; Chen, Genshe

2011-06-01

91

TrackEye tracking algorithm characterization  

NASA Astrophysics Data System (ADS)

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.

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

2004-10-01

92

Tenure Track, Mommy Track Susan Landau  

E-print Network

Tenure Track, Mommy Track Susan Landau My husband and I married while I was a graduate student flags, my batteries fade. I've lost about two years of research in the first five years after my Ph.D Ph.D. degree requires five to seven years of study after a B.A., and a tenure decision generally

Landau, Susan

93

Calculating track thrust with track functions  

NASA Astrophysics Data System (ADS)

In e+e- event shapes studies at LEP, two different measurements were sometimes performed: a calorimetric measurement using both charged and neutral particles and a track-based measurement using just charged particles. Whereas calorimetric measurements are infrared and collinear safe, and therefore calculable in perturbative QCD, track-based measurements necessarily depend on nonperturbative hadronization effects. On the other hand, track-based measurements typically have smaller experimental uncertainties. In this paper, we present the first calculation of the event shape track thrust and compare to measurements performed at ALEPH and DELPHI. This calculation is made possible through the recently developed formalism of track functions, which are nonperturbative objects describing how energetic partons fragment into charged hadrons. By incorporating track functions into soft-collinear effective theory, we calculate the distribution for track thrust with next-to-leading logarithmic resummation. Due to a partial cancellation between nonperturbative parameters, the distributions for calorimeter thrust and track thrust are remarkably similar, a feature also seen in LEP data.

Chang, Hsi-Ming; Procura, Massimiliano; Thaler, Jesse; Waalewijn, Wouter J.

2013-08-01

94

To Track or Not to Track?  

ERIC Educational Resources Information Center

Background: This paper was written for a graduate level action research course at Muskingum University, located in New Concord, OH. Purpose: The purpose of this research was to determine which method of instruction best serves ALL high school students. Is it more advantageous to track ("ability group") students or not to track students in high

Hesson, Heather

2010-01-01

95

Dragon's Tracking and Detection Systems for the TDT2000 Evaluation  

Microsoft Academic Search

We describe the tracking and detection systems submitted by Dragon for the TDT2000 evaluation. Our research focus is on improving the distance measure between story and story collection, a computation which is central to many of the TDT tasks. In our tracking engine, we improved the measure by strengthening our targeting procedure, and introduced unsupervised adaptation on high-scoring test stories.

J. P. Yamron; S. Knecht

2000-01-01

96

Track and Field Dynamics. Second Edition.  

ERIC Educational Resources Information Center

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

Ecker, Tom

97

Dynamically shared optical tracking  

Microsoft Academic Search

Optical tracking using ARToolkit provides us with the base technology for a wealth of augmented reality applications. However marker-based optical tracking using a single camera has some drawbacks. Markers must be fully visible to the camera all the time to produce tracking output - occlusion by other objects and limited camera field of view constrain the area that can be

Florian Ledermann; Gerhard Reitmayr; Dieter Schmalstieg

2002-01-01

98

Track and Field Facilities.  

ERIC Educational Resources Information Center

Discusses planning and design tips that help ensure track and field facilities are successful and well-suited to both school and community use. Examines approaches to determining the best track surface and ways to maximize track and field flexibility with limited space. (GR)

Wood, Tony

2001-01-01

99

Visual Hand Tracking Algorithms  

Microsoft Academic Search

Tracking is an important section in a gesture recognition system. Numerous techniques for segmentation, tracking, modeling and recognition have been proposed during several past years. A few papers comparing different approaches have been published. However, a comprehensive survey on tracking is still missing. We try to fill this vacuum by reviewing most widely used methods and techniques and collecting their

Fariborz Mahmoudi; Mehdi Parviz

2006-01-01

100

Solar tracking apparatus  

DOEpatents

The invention relates to a solar tracking device which tracks the position of the sun using paired, partially-shaded photocells. Auxiliary photocells are used for initial acquisition of the sun and for the suppression of false tracking when the sun is obscured by clouds.

Hammons, Burrell E. (Albuquerque, NM)

1980-01-01

101

Photographing Track Meets.  

ERIC Educational Resources Information Center

Argues that the sport of track and field, because of the sport itself and its relatively easy access to photographers, is an obvious target for cameras. Discusses rules of the track that photographers must follow; picking a location; and equipment. Discusses shooting four specific track and field events and offers behind the scenes photos. (SR)

Palmer, Erik

2001-01-01

102

CENTRAL AVENUE CENTRAL AVENUE  

E-print Network

Mexican food. Mon.­Fri., 7 am­6 pm Sat., 8 am­2 pm; Sun., 9 am­2 pm 9 Home Run Pizza 1627 Central Avenue-7591 Breakfast burritos, hamburgers, and New Mexican food. Tues.­Fri., 6 am­1 pm Sat., 7 am­noon Closed Sunday salads and sandwiches. Daily, 6 am­12 am NOT SHOWN ON MAP 22 De Colores at the Gate 2470 East Road 662

103

CENTRAL AVENUE CENTRAL AVENUE  

E-print Network

am­3 pm Sat.­Sun., 7 am­3 pm 8 El Parasol 1903 Central Avenue 661-0303 Native New Mexican food. Mon, hamburgers, and New Mexican food. Tues.­Fri., 6 am­1 pm Sat., 7 am­noon Closed Sunday & Monday 11 Sonic Drive NOT SHOWN ON MAP 22 De Colores at the Gate 2470 East Road 662-6285 Native New Mexican cuisine, grilled

104

Fast Track: The Right Track for America  

NSDL National Science Digital Library

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.

1998-01-01

105

Hurricanes 2: Tracking Hurricanes  

NSDL National Science Digital Library

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.

2007-12-12

106

Intelligent tracking techniques  

Microsoft Academic Search

This is the Second Quarterly Report under a contract to investigate the design, test, and implementation of a set of algorithms to perform intelligent tracking and intelligent target homing on FLIR and TV Imagery. The intelligent tracker will monitor the entire field of view, detect and classify targets, perform multiple target tracking and predict changes in target signature prior to

T. J. Willett

1979-01-01

107

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

108

Tracking the Effectiveness of  

E-print Network

of Usability Evaluation Methods Abstract We present a case study that tracks usability problems predictedTracking the Effectiveness of Usability Evaluation Methods Bonnie E. John & Steven J. Marks* 12 contained in this document are those of the author and should not be interpreted as representing

109

Cooperative Modeling and Design History Tracking Using Design Tracking Matrix  

E-print Network

-client design tool. Design change among server and multiple clients are executed using the proposed concurrency design protocol. The design steps are tracked and analyzed using Design Tracking Graph and Design Tracking Matrix (DTM), which provide a design data...

Kim, Jonghyun

2010-10-12

110

Controlled ion track etching  

NASA Astrophysics Data System (ADS)

It is a common practice since long to follow the ion track-etching process in thin foils via conductometry, i.e . by measurement of the electrical current which passes through the etched track, once the track breakthrough condition has been achieved. The major disadvantage of this approach, namely the absence of any major detectable signal before breakthrough, can be avoided by examining the track-etching process capacitively. This method allows one to define precisely not only the breakthrough point before it is reached, but also the length of any non-transient track. Combining both capacitive and conductive etching allows one to control the etching process perfectly. Examples and possible applications are given.

George, J.; Irkens, M.; Neumann, S.; Scherer, U. W.; Srivastava, A.; Sinha, D.; Fink, D.

2006-03-01

111

Online track processor for the CDF upgrade  

SciTech Connect

A trigger track processor, called the eXtremely Fast Tracker (XFT), has been designed for the CDF upgrade. This processor identifies high transverse momentum (> 1.5 GeV/c) charged particles in the new central outer tracking chamber for CDF II. The XFT design is highly parallel to handle the input rate of 183 Gbits/s and output rate of 44 Gbits/s. The processor is pipelined and reports the result for a new event every 132 ns. The processor uses three stages: hit classification, segment finding, and segment linking. The pattern recognition algorithms for the three stages are implemented in programmable logic devices (PLDs) which allow in-situ modification of the algorithm at any time. The PLDs reside on three different types of modules. The complete system has been installed and commissioned at CDF II. An overview of the track processor and performance in CDF Run II are presented.

E. J. Thomson et al.

2002-07-17

112

Sun tracking solar energy collector  

NASA Technical Reports Server (NTRS)

A parabolic reflector is supported so that it can track the sun. The support for this reflector comprises an azimuth frame supported on two wheels and a central pivotal point which are positioned in a substantially triangular configuration. On top of the azimuth frame, there is provided an elevation frame. The reflector rides on wheels captured within curved rails. The wheels of the azimuth frame are driven by an azimuth actuator. The reflector structure is counterbalanced about its elevation axis by a pendulum cable system which is driven by a motor. At the focal point of the parabolic reflector, a heat engine or receiver is mounted independently on the reflector. Suitable means are provided for moving the reflector about its two axes.

Perkins, G. S. (inventor)

1978-01-01

113

Tracking an underwater target  

E-print Network

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 ...

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

2007-01-01

114

Tracking Sea Otters  

USGS Multimedia Gallery

USGS sea otter researcher Tim Tinker drives the boat on an expedition to track and observe sea otters in Monterey Bay, California. USGS scientists study sea otters in efforts to help the threatened species continue to recover from near extinction....

115

Reconstructing Volume Tracking  

Microsoft Academic Search

A new algorithm for the volume tracking of interfaces in two dimensions is presented. The algorithm is based upon a well-defined, second-order geometric solution of a volume evolution equation. The method utilizes local discrete material volume and velocity data to track interfaces of arbitrarily complex topology. A linearity-preserving, piecewise linear interface geometry approximation ensures that solutions generated retain second-order spatial

William J. Rider; Douglas B. Kothe

1998-01-01

116

MATERIAL TRACKING USING LANMAS  

SciTech Connect

LANMAS is a transaction-based nuclear material accountability software product developed to replace outdated and legacy accountability systems throughout the DOE. The core underlying purpose of LANMAS is to track nuclear materials inventory and report transactions (movement, mixing, splitting, decay, etc.) to the Nuclear Materials Management and Safeguards System (NMMSS). While LANMAS performs those functions well, there are many additional functions provided by the software product. As a material is received onto a site or created at a site, its entire lifecycle can be tracked in LANMAS complete to its termination of safeguards. There are separate functions to track material movements between and within material balance areas (MBAs). The level of detail for movements within a MBA is configurable by each site and can be as high as a site designation or as detailed as building/room/rack/row/position. Functionality exists to track the processing of materials, either as individual items or by modeling a bulk process as an individual item to track inputs and outputs from the process. In cases where sites have specialized needs, the system is designed to be flexible so that site specific functionality can be integrated into the product. This paper will demonstrate how the software can be used to input material into an account and track it to its termination of safeguards.

Armstrong, F.

2010-06-07

117

A novel method for retinal vessel tracking using particle filters.  

PubMed

Extraction of a proper map from the vessel paths in the retinal images is a prerequisite for many applications such as identification. In this paper, we present a new approach based on particle filtering to determine and locally track the vessel paths in retina. Particle filter needs to use an acceptable probability density function (PDF) describing the blood vessels which must be provided by the retinal image. For this purpose, the product of the green and blue channels of the RGB retinal images is considered and after a median filtering stage, it is used as a PDF for tracking procedure. Then a stage of optic disc localization is performed to localize the starting points around the optic disc. With a proper set of starting points, the iterative tracking procedure initiates. First, a uniform propagation of the particles on an annular ring around each point (including starting points or ones determined as central points in the previous iteration) is performed. The particle weights are evaluated and accordingly, each particle is decided to be inside or outside the vessel. The subsequent stage is to analyze the hypothetical vectors between a central point and each of the inside vessel particles to find ones located inside vessel. Afterwards, the particles are clustered using quality threshold clustering method. Finally, each cluster introduces a central point for pursuing the tracking procedure in the next iteration. The tracking proceeds towards a bifurcation or the end of the vessels. We introduced two criteria: automatic/manually tracked ratio (AMTR) and false/manually tracked ratio (FMTR) for evaluating the tracking results. Apart from the labeling accuracy, the average values of AMTR and FMTR were 0.7746 and 0.2091, respectively. The proposed method successfully deals with the bifurcations with robustness against noise and tracks the thin vessels. PMID:23434235

Nayebifar, B; Abrishami Moghaddam, H

2013-06-01

118

How to Build a Track.  

ERIC Educational Resources Information Center

Information on various aspects of track construction is provided, divided into the following areas--(1) general requirements for a standard track, (2) selection of a site, (3) construction of the body of the track, (4) track measurements and markers, (5) specifications for construction of takeoffs, runways, circles, and field areas, (6) care of

Jones, Thomas E.

119

Robust low complexity feature tracking  

Microsoft Academic Search

In this paper, we present the Kanade-Lucas-Tomasi (KLT) tracking algorithm coupled with a varying integration window, which tracks a small subset of feature points to initialize the approximate motion model between images. For the remaining larger subset of the feature points initial tracking location is predicted by using this motion model, thus improving the tracking result. For an image of

Pradip Mainali; Qiong Yang; Gauthier Lafruit; Rudy Lauwereins; Luc J. Van Gool

2010-01-01

120

Deep inelastic inclusive and dfifractive scattering at Q{sup 2} values from 25 to 320 GeV{sup 2} with the ZEUS forward plug calorimeter.  

SciTech Connect

Deep inelastic scattering and its diffractive component, ep {yields} e{prime} {gamma}* p {yields} e{prime} XN, have been studied at HERA with the ZEUS detector using an integrated luminosity of 52.4 pb{sup -1}. The M{sub X} method has been used to extract the diffractive contribution. A wide range in the center-of-mass energy W(37-245 GeV), photon virtuality Q{sup 2} (20-450 GeV{sup 2}) and mass M{sub X} (0.28-35 GeV) is covered. The diffractive cross section for 2 < M{sub X} < 15 GeV rises strongly with W, the rise becoming steeper as Q{sup 2} increases. The data are also presented in terms of the diffractive structure function, F{sub 2}{sup D(3)}, of the proton. For fixed Q{sup 2} and fixed M{sub X}, xpF{sub 2}{sup D(3)} shows a strong rise as xP {yields} 0, where xp is the fraction of the proton momentum carried by the pomeron. For Bjorken-x < 1 x 10{sup -3}, xpF{sub 2}{sup D(3)} shows positive logQ{sup 2} scaling violations, while for X {ge} 5 x 10{sup -3} negative scaling violations are observed. The diffractive structure function is compatible with being leading twist. The data show that Regge factorization is broken.

Chekanov, S.; Derrick, M.; Magill, S.; Musgrave, B.; Nicholass, D.; Repond, J.; Yoshida, R.; ZEUS Collaboraton; High Energy Physics

2008-09-01

121

49 CFR 212.203 - Track inspector.  

Code of Federal Regulations, 2010 CFR

...The track inspector shall demonstrate the following specific qualifications: (1) A comprehensive knowledge of track nomenclature, track inspection techniques, track maintenance methods, and track equipment; (2) The ability to understand and...

2010-10-01

122

A spectral clustering and kalman filtering based objects detection and tracking using stereo vision with linear cameras  

Microsoft Academic Search

D scene based objects detection and tracking is a central problem in many intelligent transportation applications. Dynamic stereo vision is the known approach to solve this problem. It consists in detecting and tracking objects from their reconstructed features using stereo images. This paper proposes a new method for detecting and tracking objects using stereo vision with linear cameras. Edge points

Safaa Moqqaddem; Y. Ruichek; R. Touahni; A. Sbihi

2011-01-01

123

The LHCb tracking system  

NASA Astrophysics Data System (ADS)

The LHCb detector is being constructed to measure CP-violation parameters and rare B decays. The LHCb tracking system consists of silicon micro-strip detectors and straw chambers. The system is composed of four major sub-detectors: the Vertex Locator (Velo), Trigger Tracker (TT), Inner Tracker (IT) and Outer Tracker (OT). The Velo uses silicon micro-strip detectors which are placed at 8 mm from the beam, and that can be retracted during injection. The TT is a four-layer silicon-strip detector that covers the full acceptance of the experiment at the entrance of the spectrometer dipole magnet. The fringe field of the magnet allows the transverse momentum of tracks to be measured by their deflection between the Velo and TT detectors for use in the trigger. The IT and OT detectors measure the tracks behind the magnet. The IT is a silicon-strip detector which covers the region close to the beam pipe, while the OT is a straw tube detector which covers the rest of the acceptance. All of the detectors are currently under construction and will be ready for installation before the end of 2006. The expected performance for the tracking system is as follows: the tracking efficiency is larger than 95% and the ghost rate is smaller than 7%, for tracks with a momentum larger than 12 GeV. The momentum resolution ranges from 0.35% to 0.5% and the IP resolution reaches 14 ?m for tracks with a large transverse momentum.

van Hunen, Jeroen J.

2007-03-01

124

Low-Complexity Tracking-Aware H.264 Video Compression for Transportation Surveillance  

Microsoft Academic Search

In centralized transportation surveillance systems, video is captured and compressed at low processing power remote nodes and transmitted to a central location for processing. Such compression can reduce the accuracy of centrally run automated object tracking algorithms. In typical systems, the majority of communications bandwidth is spent on encoding temporal pixel variations such as acquisition noise or local changes to

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

2011-01-01

125

NASA: Satellite Tracking  

NSDL National Science Digital Library

While NASA has offered a number of fine sites about their research for the general public over the years, this particular site may be one of their best. With a minimum of fuss, visitors can use several of the online tracking applications offered here to locate hundreds of satellites and other such large objects in space. A good way to start a visit to this site is by taking a look at the J-Track 2.5 section, as it offers a quick way to find out the current location of the Space Station and the Chandra X-Ray Observatory. Additionally, visitors can also locate weather satellites using this application. The Live 3D Java Tracking Display here allows visitors to monitor close to 700 satellites that are in motion around the earth. Finally, visitors can also use a handy application offered here that allows them to determine which satellites might be seen from their location in the night sky.

2005-01-01

126

Tracks to therapy  

NASA Technical Reports Server (NTRS)

Studies of the structure of particle tracks have led to models of track effects based on radial dose and radiobiological target theory that have been very successful in describing and predicting track effects in physical, chemical, and biological systems. For describing mammalian cellular inactivation two inactivation modes are required, called gamma-kill and ion-kill, the first due to synergistic effects of delta rays from adjacent ion paths thus resembling the effects from gamma rays, and the second to the effects of single ion transits through a cell nucleus. The ion-kill effect is more severe, where the fraction of cells experiencing ion kill is responsible for a decrease in the oxygen enhancement ratio, and an increase in relative biological effectiveness, but these are accompanied by loss of repair, hence to a reduction in the efficiency of fractionation in high LET therapy, as shown by our calculations for radiobiological effects in the "spread out Bragg Peak".

Katz, R.; Cucinotta, F. A.

1999-01-01

127

Cells Tracking by Snakes  

NASA Astrophysics Data System (ADS)

In this paper, a cells detection method based on active contours is presented. Active contours or snakes are widely use in image segmentation and tracking problems. Traditionally, active contours initialization is performance manually, this method provides an automatic initialization based on cross correlation. Cell tracking based on active contours provide a faster method to performance this task to multitarget problem. External and internal forces on the image are computed to determinate the action area of the active contours, this task is performance by the Vector Field Convolution (VFC) algorithm.

Perez-Careta, Eduardo; Avina-Cervantes, Gabriel; Debeir, Oliver; Sanchez-Mondragon, Jose Javier; Torres-Cisneros, Miguel

2008-08-01

128

Cell tracking using nanoparticles.  

PubMed

Tracking cells in regenerative medicine is becoming increasingly important for basic cell therapy science, for cell delivery optimization and for accurate biodistribution studies. This report describes nanoparticles that utilize stable-isotope metal labels for multiple detection technologies in preclinical studies. Cells labeled with nanoparticles can be imaged by electron microscopy, fluorescence, and magnetic resonance. The nanoparticle-labeled cells can be quantified by neutron activation, thereby allowing, with the use of standard curves, the determination of the number of labeled cells in tissue samples from in vivo sources. This report describes the characteristics of these nanoparticles and methods for using these nanoparticles to label and track cells. PMID:20559922

Vaccaro, Dennis E; Yang, Meiheng; Weinberg, James S; Reinhardt, Christopher P; Groman, Ernest V

2008-09-01

129

Simple front tracking  

SciTech Connect

A new and simplified front tracking algorithm has been developed as an aspect of the extension of this algorithm to three dimensions. Here the authors emphasize two main results: (1) a simplified description of the microtopology of the interface, based on interface crossings with cell block edges, and (2) an improved algorithm for the interaction of a tracked contact discontinuity with an untracked shock wave. For the latter question, they focus on the post interaction jump at the contact, which is a purely 1D issue. Comparisons to other methods, including the level set method, are included.

Glimm, J.; Grove, J.W.; Li, X.; Zhao, N.

1999-04-01

130

The Tensor Track, III  

E-print Network

We provide an informal up-to-date review of the tensor track approach to quantum gravity. In a long introduction we describe in simple terms the motivations for this approach. Then the many recent advances are summarized, with emphasis on some points (Gromov-Hausdorff limit, Loop vertex expansion, Osterwalder-Schrader positivity...) which, while important for the tensor track program, are not detailed in the usual quantum gravity literature. We list open questions in the conclusion and provide a rather extended bibliography.

Vincent Rivasseau

2013-11-06

131

Spirit Leaves Telling Tracks  

NASA Technical Reports Server (NTRS)

Scientists have found clues about the nature of martian soil through analyzing wheel marks from the Mars Exploration Rover Spirit in this image. The image was taken by Spirit's rear hazard-identification camera just after the rover drove approximately 1 meter (3 feet) northwest off the Columbia Memorial Station (lander platform) early Thursday morning. That the wheel tracks are shallow indicates the soil has plenty of strength to support the moving rover. The well-defined track characteristics suggest the presence of very fine particles in the martian soil (along with larger particles). Scientists also think the soil may have some cohesive properties.

2004-01-01

132

Track My Life  

NSDL National Science Digital Library

Where does all the time go? It's a good question, and Track My Life can help you learn more about how and where your time is spent. The application runs in the background of a user's phone and tracks how much time they spend in any given location. At the end of each day, users can look at a full report to see a breakdown of the places they were and how long they spent in each location. This version is compatible with iPhone, Windows Phone, and Android.

2012-01-01

133

Muon Track Matching  

E-print Network

For most physical processes the tracks observed in the muon stations must be matched with the corresponding tracks in the inner tracker, the external muon system providing muon identification and triggering but the tracker points giving the precise momentum measurement at lower momenta. For high momenta the momentum resolution is much improved by the interconnection of inner and outer measurements. The matching of outer and inner measurements is more delicate in case of muons embedded in jets. A study of the matching procedure was carried out using samples of (b, anti b) jets at high Pt, requiring (b, anti b) -> mu decays.

A. Benvenuti; D. Denegri; V. Genchev; A. Khanov; N. Stepanov; P. Vankov

2000-08-30

134

BNSF RAILROAD MAIN TRACK 1 AND THE UNION PACIFIC TRACK ...  

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

BNSF RAILROAD MAIN TRACK 1 AND THE UNION PACIFIC TRACK CUTTING THROUGH BEDROCK AROUND SULLIVAN?S CURVE. VIEW TO THE WEST. 102 - Burlington Northern Santa Fe Railroad, Cajon Subdivision, Between Cajon Summit and Keenbrook, Devore, San Bernardino County, CA

135

Respiration tracking in radiosurgery  

Microsoft Academic Search

Respiratory motion is difficult to compensate for with conventional radiotherapy systems. An accurate tracking method for following the motion of the tumor is of considerable clinical relevance. We investigate methods to compensate for respiratory motion using robotic radiosurgery. In this system the therapeutic beam is moved by a robotic arm, and follows the moving target through a combination of infrared

Achim Schweikard; Hiroya Shiomi

2004-01-01

136

Foinaven fast track flowlines  

SciTech Connect

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.

Taylor, L.H.; Mair, J.

1996-12-31

137

Dust Devil Tracks  

NASA Technical Reports Server (NTRS)

[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.

2005-01-01

138

Eye Tracking Denis Leimberg  

E-print Network

over six months at the Section of Intelligent Signal Processing, Department of Informatics discussions, and for introducing the world of eye tracking. Kaare Brandt Petersen, for sparing a day, during his busy ph.d.-nalizing period, to provide for hairy mathematical derivations. Martin E. Nielsen

139

Active sampling via tracking  

Microsoft Academic Search

To learn an object detector labeled training data is required. Since unlabeled training data is often given as an image sequence we propose a tracking-based approach to minimize the manual effort when learning an object detector. The main idea is to apply a tracker within an active on-line learning framework for selecting and labeling unlabeled samples. For that purpose the

Peter M. Roth; Horst Bischof

2008-01-01

140

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

E-print Network

GRADUATE SCHOOL TRACKING PROGRAM HOW TO's GRADUATE SCHOOL TRACKING PROGRAM Objective: To provide 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

Pilyugin, Sergei S.

141

Signs and Tracks of Animals  

NSDL National Science Digital Library

Students will examine clues about animals such as nests, leaves, feathers, fur, tracks that allow some conclusions about the identity, physical characteristics or behavior of the animals. Students will study the characteristics of animal tracks.

Grimm, Susanne

142

Topic in Depth - 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.

2010-09-09

143

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

144

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.

2008-02-21

145

A Fast Algorithm to Track Changes of Direction of a Person Using Magnetometers  

E-print Network

A Fast Algorithm to Track Changes of Direction of a Person Using Magnetometers A. Fleury, Student magnetometers can be used to monitor the changes of direction of a person. Index Terms-- Magnetometers, embedded] used a central consisting of accelerometers, magnetometers and gyroscopes to track movements of a limb

Paris-Sud XI, Université de

146

Adaptive Probabilistic Tracking Embedded in a Smart Camera  

Microsoft Academic Search

Tracking applications based on distributed and embedded sensor networks are emerging today, both in the field of surveillance (airports, lab facilities, train stations, museums, public spots) and industrial vision (visual servoing, factory automation). Traditional centralized approaches offer several drawbacks, due to limited communication bandwidth, computational requirements and thus also limited spatial camera resolution and framerate. In this paper, we present

Sven Fleck; W. Strasser

2005-01-01

147

Tracking Design Smells: Lessons from a Study of God Classes  

E-print Network

Tracking Design Smells: Lessons from a Study of God Classes St´ephane Vaucher Foutse Khomh GEODES by accident as functionalities are incrementally added to a central class over the course of its evolution show that by identifying the evolution of "godliness", we can distinguish between those classes

Moha, Naouel

148

Predictive Tracking over Occlusions by 4-Month-Old Infants  

ERIC Educational Resources Information Center

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

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

2007-01-01

149

Object tracking through adaptive correlation  

Microsoft Academic Search

Current U.S. Air Force interests include a desire to track an object based on its shape once it has been designated as a target. This paper discusses the use of a correlation based system to track an object through a series of images based on templates derived from previous image frames. The ability to track is extended to sequences which

Dennis A. Montera; Steven K. Rogers; Dennis W. Ruck; Mark E. Oxley

1993-01-01

150

Career Tracks Presentation to HR  

E-print Network

Career Tracks Presentation to HR Contacts Compensation UC San Diego Campus Human Resources that is being implemented at all UC locations The Career Tracks framework aligns jobs with similar positions internally and in the external marketplace Career Tracks includes non-represented staff positions. Senior

Jun, Suckjoon

151

Satellite (IRLS) tracking of elk  

NASA Technical Reports Server (NTRS)

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.

Buechner, H. K.

1972-01-01

152

Sun tracking solar energy boiler  

Microsoft Academic Search

A sun tracking solar energy boiler is described comprising, in combination, a solar radiation collector and tracking assembly, a boiler assembly, and an electric power generating assembly, said collector and tracking assembly comprising a lens, a hollow crown plate located approximately at the focal point of the lens, said lens being movable by a diurnal drive means and a declination

1980-01-01

153

Gossip: Identifying Central Individuals in a Social Network  

E-print Network

We examine individuals' abilities to identify the highly central people in their social networks, where centrality is defined by diffusion centrality (Banerjee et al., 2013), which characterizes a node's influence in spreading information. We first show that diffusion centrality nests standard centrality measures -- degree, eigenvector and Katz-Bonacich centrality -- as extreme special cases. Next, we show that boundedly rational individuals can, simply by tracking sources of gossip, identify who is central in their social network in the specific sense of having high diffusion centrality. Finally, we examine whether the model's predictions are consistent with data in which we ask people in each of 35 villages whom would be the most effective point from which to initiate a diffusion process. We find that individuals accurately nominate central individuals in the diffusion centrality sense. Additionally, the nominated individuals are more central in the network than "village leaders" as well as those who are mo...

Banerjee, Abhijit; Duflo, Esther; Jackson, Matthew O

2014-01-01

154

Adaptive Moving Object Tracking Integrating Neural Networks And Intelligent Processing  

NASA Astrophysics Data System (ADS)

A real-time adaptive scheme is introduced to detect and track moving objects under noisy, dynamic conditions including moving sensors. This approach integrates the adaptiveness and incremental learning characteristics of neural networks with intelligent reasoning and process control. Spatiotemporal filtering is used to detect and analyze motion, exploiting the speed and accuracy of multiresolution processing. A neural network algorithm constitutes the basic computational structure for classification. A recognition and learning controller guides the on-line training of the network, and invokes pattern recognition to determine processing parameters dynamically and to verify detection results. A tracking controller acts as the central control unit, so that tracking goals direct the over-all system. Performance is benchmarked against the Widrow-Hoff algorithm, for target detection scenarios presented in diverse FLIR image sequences. Efficient algorithm design ensures that this recognition and control scheme, implemented in software and commercially available image processing hardware, meets the real-time requirements of tracking applications.

Lee, James S. J.; Nguyen, Dziem D.; Lin, C.

1989-03-01

155

The central track trigger of the DO experiment  

E-print Network

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) ...

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

156

On particle track detectors  

NASA Technical Reports Server (NTRS)

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.

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

1973-01-01

157

Longwall shearer tracking system  

NASA Technical Reports Server (NTRS)

A tracking system for measuring and recording the movements of a longwall shearer vehicle includes an optical tracking assembly carried at one end of a desired vehicle path and a retroreflector assembly carried by the vehicle. Continuous horizontal and vertical light beams are alternately transmitted by means of a rotating Dove prism to the reflector assembly. A vertically reciprocating reflector interrupts the continuous light beams and converts these to discrete horizontal and vertical light beam images transmitted at spaced intervals along the path. A second rotating Dove prism rotates the vertical images to convert them to a second series of horizontal images while the first mentioned horizontal images are left unrotated and horizontal. The images are recorded on a film.

Poulsen, P. D. (inventor); Stein, R. J.; Pease, R. E.

1984-01-01

158

Stacks, Queues and Tracks  

Microsoft Academic Search

This paper studies stack, queue, and track layouts of graph subdivisions. It is known that every graph has a 3-stack subdivision. The best known upper bound on the number of division vertices per edge in a 3-stack subdivision of an n-vertex graph G is improved from O(log n) to O(log minfsn(G);qn(G)g). This result reduces the question of whether queue-number is

David R. Wood

159

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

PubMed

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

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

2012-01-01

160

@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.

161

Eye-Tracking Data  

PubMed Central

Survey researchers since Cannell have worried that respondents may take various shortcuts to reduce the effort needed to complete a survey. The evidence for such shortcuts is often indirect. For instance, preferences for earlier versus later response options have been interpreted as evidence that respondents do not read beyond the first few options. This is really only a hypothesis, however, that is not supported by direct evidence regarding the allocation of respondent attention. In the current study, we used a new method to more directly observe what respondents do and do not look at by recording their eye movements while they answered questions in a Web survey. The eye-tracking data indicate that respondents do in fact spend more time looking at the first few options in a list of response options than those at the end of the list; this helps explain their tendency to select the options presented first regardless of their content. In addition, the eye-tracking data reveal that respondents are reluctant to invest effort in reading definitions of survey concepts that are only a mouse click away or paying attention to initially hidden response options. It is clear from the eye-tracking data that some respondents are more prone to these and other cognitive shortcuts than others, providing relatively direct evidence for what had been suspected based on more conventional measures. PMID:21253437

Galesic, Mirta; Tourangeau, Roger; Couper, Mick P.; Conrad, Frederick G.

2008-01-01

162

Fast Track Study  

NASA Technical Reports Server (NTRS)

The NASA Fast Track Study supports the efforts of a Special Study Group (SSG) made up of members of the Advanced Project Management Class number 23 (APM-23) that met at the Wallops Island Management Education Center from April 28 - May 8, 1996. Members of the Class expressed interest to Mr. Vem Weyers in having an input to the NASA Policy Document (NPD) 7120.4, that will replace NASA Management Institute (NMI) 7120.4, and the NASA Program/Project Management Guide. The APM-23 SSG was tasked with assisting in development of NASA policy on managing Fast Track Projects, defined as small projects under $150 million and completed within three years. 'Me approach of the APM-23 SSG was to gather data on successful projects working in a 'Better, Faster, Cheaper' environment, within and outside of NASA and develop the Fast Track Project section of the NASA Program/Project Management Guide. Fourteen interviews and four other data gathering efforts were conducted by the SSG, and 16 were conducted by Strategic Resources, Inc. (SRI), including five interviews at the Jet Propulsion Laboratory (JPL) and one at the Applied Physics Laboratory (APL). The interviews were compiled and analyzed for techniques and approaches commonly used to meet severe cost and schedule constraints.

1996-01-01

163

Exclusive central diffractive production of scalar, pseudoscalar and vector mesons  

E-print Network

We discuss exclusive central diffractive production of scalar ($f_{0}(980)$, $f_{0}(1370)$, $f_{0}(1500)$), pseudoscalar ($\\eta$, $\\eta'(958)$), and vector ($\\rho^{0}$) mesons in proton-proton collisions. The amplitudes are formulated in terms of effective vertices required to respect standard rules of Quantum Field Theory and propagators for the exchanged pomeron and reggeons. Different pomeron-pomeron-meson tensorial (vectorial) coupling structures are possible in general. In most cases two lowest orbital angular momentum - spin couplings are necessary to describe experimental differential distributions. For the $f_{0}(980)$ and $\\eta$ production the reggeon-pomeron, pomeron-reggeon, and reggeon-reggeon exchanges are included in addition, which seems to be necessary at relatively low energies. The theoretical results are compared with the WA102 experimental data, in order to determine the model parameters. For the $\\rho^{0}$ production the photon-pomeron and pomeron-photon exchanges are considered. The coupling parameters of tensor pomeron and/or reggeon are fixed from the H1 and ZEUS experimental data of the $\\gamma p \\to \\rho^{0} p$ reaction. We present first predictions of this mechanism for $pp \\to pp \\pi^{+} \\pi^{-}$ reaction being studied at COMPASS, RHIC, Tevatron, and LHC. Correlation in azimuthal angle between outgoing protons and distribution in pion rapidities at $\\sqrt{s} = 7$TeV are presented. We show that high-energy central production of mesons could provide crucial information on the spin structure of the soft pomeron.

Piotr Lebiedowicz; Otto Nachtmann; Antoni Szczurek

2014-10-01

164

Effects of Neutrinos and General Relativity for the Central Engine of Long GRBs  

NASA Astrophysics Data System (ADS)

I have developed two numerical code to investigate the central engine of long GRBs: One is a newtonian code with some micophysics, and the other is a General Relativistic MHD (GRMHD) code without microphysics. As for the newtonian code, neutrino heating processes and magnetic fields are included in the ZEUS code to investigate the collapsar model. It is found that neutrino heating processes are insufficient to launch a jet in this study. A Jet is launched by magnetic fields, although this jet is non-relativistic at present. Simulations of the order of 10 sec may be required to generate a powerful jet by special (general) relativistic MHD code. As for my GRMHD code, it has passed many test calculations. Now I am doing a preliminary simulation of a collapsar using my GRMHD code. In the future, I am planning to include some important microphysics into my GRMHD code and perform realistic simulations of collapsars.

Nagataki, Shigehiro

2008-05-01

165

Fuzzy Logic Particle Tracking  

NASA Technical Reports Server (NTRS)

A new all-electronic Particle Image Velocimetry technique that can efficiently map high speed gas flows has been developed in-house at the NASA Lewis Research Center. Particle Image Velocimetry is an optical technique for measuring the instantaneous two component velocity field across a planar region of a seeded flow field. A pulsed laser light sheet is used to illuminate the seed particles entrained in the flow field at two instances in time. One or more charged coupled device (CCD) cameras can be used to record the instantaneous positions of particles. Using the time between light sheet pulses and determining either the individual particle displacements or the average displacement of particles over a small subregion of the recorded image enables the calculation of the fluid velocity. Fuzzy logic minimizes the required operator intervention in identifying particles and computing velocity. Using two cameras that have the same view of the illumination plane yields two single exposure image frames. Two competing techniques that yield unambiguous velocity vector direction information have been widely used for reducing the single-exposure, multiple image frame data: (1) cross-correlation and (2) particle tracking. Correlation techniques yield averaged velocity estimates over subregions of the flow, whereas particle tracking techniques give individual particle velocity estimates. For the correlation technique, the correlation peak corresponding to the average displacement of particles across the subregion must be identified. Noise on the images and particle dropout result in misidentification of the true correlation peak. The subsequent velocity vector maps contain spurious vectors where the displacement peaks have been improperly identified. Typically these spurious vectors are replaced by a weighted average of the neighboring vectors, thereby decreasing the independence of the measurements. In this work, fuzzy logic techniques are used to determine the true correlation displacement peak even when it is not the maximum peak, hence maximizing the information recovery from the correlation operation, maintaining the number of independent measurements, and minimizing the number of spurious velocity vectors. Correlation peaks are correctly identified in both high and low seed density cases. The correlation velocity vector map can then be used as a guide for the particle-tracking operation. Again fuzzy logic techniques are used, this time to identify the correct particle image pairings between exposures to determine particle displacements, and thus the velocity. Combining these two techniques makes use of the higher spatial resolution available from the particle tracking. Particle tracking alone may not be possible in the high seed density images typically required for achieving good results from the correlation technique. This two-staged velocimetric technique can measure particle velocities with high spatial resolution over a broad range of seeding densities.

2005-01-01

166

Thermal Tracking of Sports Players  

PubMed Central

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

Gade, Rikke; Moeslund, Thomas B.

2014-01-01

167

Combined 40Ar/39Ar and Fission-Track study of the Freetown Layered Igneous Complex, Freetown, Sierra Leone, West Africa: Implications for the Initial Break-up of Pangea to form the Central Atlantic Ocean and Insight into the Post-rift Evolution of the Sie  

NASA Astrophysics Data System (ADS)

Sierra Leone lies within the south-western part of the West African Craton and comprises two major Archaean structural divisions: a low-grade granite-greenstone terrane characterised by N-S striking structures and a NW-SE striking highly metamorphosed belt of strained rocks that form the coastal margin of the craton. Intruded into the belt is the Freetown Layered Igneous Complex (FLIC), a tholeiitic magamtic body emplaced prior to or during the break-up of Pangea to form the Central Atlantic Ocean and, forming today the high ground of the coastal outline of Sierra Leone which is one of the most distinctive features on the West African coast. The break-up of Pangaea to form the Central Atlantic and its passive margins began in the Early Jurassic. Geo-tectonically, the break-up was particularly characterised by the formation of the Central Atlantic Magmatic Province (CAMP), covering once-contiguous parts of North America, Europe, Africa and South America. The FLIC forming part of the heart of CAMP is the largest single layered igneous intrusive yet known on either side of the Central Atlantic, measuring on surface, 65 x 14 x 7 km. Geophysical investigations indicate that the intrusion extends offshore to a depth of about 20 km. Geologically the Complex is a rhythmically layered elongated ultramafic-mafic lopolith divisible into 4 major zones each comprising repeated sequences of troctolitic, gabbroic and anorthositic rocks. An idealised unit of layering is from base upwards: dunite, troctolite, olivine-gabbro, leuco-gabbro, gabbro-norite and anorthosite cumulates. 40Ar-39Ar age spectra and 40Ar/36Ar versus 39Ar/36Ar isochron plots obtained by stepwise-heating experiments on plagioclases, biotites and amphiboles from troctolites, olivine-gabbros, gabbro-norites and anorthosites of the four zones yield plateau and isochron ages that seem to depict the cooling history of the Complex after emplacement. The biotites and some of the plagioclases and amphiboles give very good plateaus that range from 196.3 3 Ma to 232.1 9 Ma with the best-fit isochron plots showing a range from 193.3 10 Ma to 234.1 11 Ma. Because these dates represent cooling ages, we interpret them as representing a minimum intrusion-age of the Complex implying that its true emplacement age might be somewhat older than 230 Ma. Given that most established CAMP ages revolve around 200 Ma or younger, we hypothesise that FLIC represents a hitherto unknown pre-CAMP magmatic event that might have thermally triggered the initial break-up of Pangaea to form the Central Atlantic. This view is consistent with field-observations that the Complex is cross-cut by predominantly coast-parallel mafic dykes attributed to the CAMP dyke-swarm. To ascertain the hypothesis, we are currently carrying out U-Pb zircon dating to establish, precisely, the true emplacement age of the Complex. The Fission-track ages vary from 91.7 7 Ma to 114.6 9 Ma. This age range shows that after emplacement and crystallisation, the FLIC underwent an extremely slow cooling for a long period of time. This in turn implies that after the break-up of Pangea to form, in part, the Sierra Leone margin, a late and slow uplift (Erosion/denudation) that took place during the Cretaceous was a very important geological process that characterised the post-rift evolution of the margin. References: Barrie, I.J., P.A.M. Andriessen, F.F. Beunk, J.R. Wijbrans, V.E.H. Strasser-King, D.V.A.Fode. (2006). Tectonothermal Evolution of the Sierra Leone Passive Continental Margin, West Africa: Constraints from Thermochronology. Geochemica et Cosmochemica Acta 70 (18): A36- A36 Suppl. S Aug-Sep 2006. Marzoli, A., P.R. Renne, E.M. Piccirillo, M. Ernesto, G. Bellieni, A De Min. (1999). Extensive 200-Million-Year-Old Continental Flood Basalts of the Central Atlantic Magmatic Province. Science284: 616-618. McHone, J.G. (2000). Non-plume magmatism and rifting during the opening of the central Atlantic Ocean. Tectonophysics, 316: 287-296. Umeji, A.C. (1983). Geochemistry and Mineralogy of the Freetown Layered Basic Igne

Barrie, Ibrahim; Wijbrans, Jan; Andriessen, Paul; Beunk, Frank; Strasser-King, Victor; Fode, Daniel

2010-05-01

168

Central Venous Catheter (Central Line)  

MedlinePLUS

... of central line Collarbone ATS PATIENT INFORMATION SERIES Infection ? ? Any tube (catheter) entering the body can make it easier for ... catheter. 4 If you have any sign of infection or other catheter problem, call your health care provider immediately. Doctors ...

169

Garlic Central  

NSDL National Science Digital Library

Can garlic help repel mosquitoes? Find out the answer to this question and more at Garlic Central, an all-about-garlic website created by aficionado Trevor Mendham. The site contains an introductory section--titled Garlic 101--and sections that address culinary uses, medicinal benefits, and cultivation. The site's Cooking section includes a collection of recipes; and information about storing, freezing, and crushing garlic. The site also features a brief how-to guide for planting, growing, and harvesting garlic. Garlic Central even hosts a virtual shopping mall that connects site visitors to a wide range of garlic-related websites peddling foodstuffs, kitchen implements, posters, books, and garden supplies. This site is also reviewed in the September 17, 2004 _NSDL Life Sciences Report_.

170

Central Park  

NSDL National Science Digital Library

As one of the worldâs greatest urban green spaces, Central Park is loved by dyed-in-the wool New Yorkers as well as visitors to the city. This reverential website provides detailed information about this fine public space and the activities that take place within its confines. On this site, visitors can look over maps of the park, learn about the parkâs many attractions, and browse a selection of photographs of this fine urban paradise. The homepage contains much of this material, along with a âCentral Park Newsâ feature, which provides news updates about goings on throughout Central Park. For those planning a visit to the park, the Events area will be most useful, as it provides information about such pastimes as rock climbing, ice skating lessons, and yoga.

2006-01-01

171

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.

1996-01-01

172

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.

173

Honeypots: Tracking Hackers  

NSDL National Science Digital Library

Honeypots are a relatively new technology in computer security. They are formally defined as "an information system resource whose value lies in unauthorized or illicit use of that resource." This is an intentionally broad definition, as honeypots can detect network intrusions, track online credit card fraud, and do almost everything in between. A good collection of research papers and technical articles dealing with honeypots can be found at this site. The papers come from some of the pioneers of the technology as well as authors who proposed more recent innovations like honeytokens.

174

Hierarchical fringe tracking  

E-print Network

The limiting magnitude is a key issue for optical interferometry. Pairwise fringe trackers based on the integrated optics concepts used for example in GRAVITY seem limited to about K=10.5 with the 8m Unit Telescopes of the VLTI, and there is a general "common sense" statement that the efficiency of fringe tracking, and hence the sensitivity of optical interferometry, must decrease as the number of apertures increases, at least in the near infrared where we are still limited by detector readout noise. Here we present a Hierarchical Fringe Tracking (HFT) concept with sensitivity at least equal to this of a two apertures fringe trackers. HFT is based of the combination of the apertures in pairs, then in pairs of pairs then in pairs of groups. The key HFT module is a device that behaves like a spatial filter for two telescopes (2TSF) and transmits all or most of the flux of a cophased pair in a single mode beam. We give an example of such an achromatic 2TSF, based on very broadband dispersed fringes analyzed by g...

Petrov, Romain G; Boskri, Abdelkarim; Folcher, Jean-Pierre; Lagarde, Stephane; Bresson, Yves; Benkhaldoum, Zouhair; Lazrek, Mohamed; Rakshit, Suvendu

2014-01-01

175

Tracking unique objects.  

PubMed

Is content addressable in the representation that subserves performance in multiple-object-tracking (MOT) experiments? We devised an MOT variant that featured unique, nameable objects (cartoon animals) as stimuli. There were two possible response modes: standard, in which observers were asked to report the locations of all target items, and specific, in which observers had to report the location of a particular object (e.g., "Where is the zebra?"). A measure of capacity derived from accuracy allowed for comparisons of the results between conditions. We found that capacity in the specific condition (1.4 to 2.6 items across several experiments) was always reliably lower than capacity in the standard condition (2.3 to 3.4 items). Observers could locate specific objects, indicating a content-addressable representation. However, capacity differences between conditions, as well as differing responses to the experimental manipulations, suggest that there may be two separate systems involved in tracking, one carrying only positional information, and one carrying identity information as well. PMID:17557588

Horowitz, Todd S; Klieger, Sarah B; Fencsik, David E; Yang, Kevin K; Alvarez, George A; Wolfe, Jeremy M

2007-02-01

176

Chemical cloud tracking systems  

NASA Astrophysics Data System (ADS)

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.).

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

2002-02-01

177

Automated call tracking systems  

SciTech Connect

User Services groups are on the front line with user support. We are the first to hear about problems. The speed, accuracy, and intelligence with which we respond determines the user`s perception of our effectiveness and our commitment to quality and service. To keep pace with the complex changes at our sites, we must have tools to help build a knowledge base of solutions, a history base of our users, and a record of every problem encountered. Recently, I completed a survey of twenty sites similar to the National Energy Research Supercomputer Center (NERSC). This informal survey reveals that 27% of the sites use a paper system to log calls, 60% employ homegrown automated call tracking systems, and 13% use a vendor-supplied system. Fifty-four percent of those using homegrown systems are exploring the merits of switching to a vendor-supplied system. The purpose of this paper is to provide guidelines for evaluating a call tracking system. In addition, insights are provided to assist User Services groups in selecting a system that fits their needs.

Hardesty, C.

1993-03-01

178

REC Tracking Systems Design Guide  

SciTech Connect

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.

Meredith Wingate

2004-02-03

179

Neuropsychology Central  

NSDL National Science Digital Library

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.

Browndyke, J. N.

2007-03-24

180

Central pain.  

PubMed

ABSTRACT Questions from patients about pain conditions and analgesic pharmacotherapy and responses from authors are presented to help educate patients and make them more effective self-advocates. The topic addressed in this issue is central pain, a neuropathic pain syndrome caused by a lesion in the brain or spinal cord that sensitizes one's perception of pain. It is a debilitating condition caused by various diseases such as multiple sclerosis, strokes, spinal cord injuries, or brain tumors. Varied symptoms and the use of pharmacological medicines and nonpharmacological therapies will be addressed. PMID:25295639

Singh, Supreet

2014-12-01

181

A real-time open-source video tracking system  

NASA Astrophysics Data System (ADS)

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 video undergoes additional registration and processing to produce multi-frame motion detections. These measurements are passed to the tracking algorithm. Tracking through an urban environment has its own unique challenges. Targets frequently cross paths, go behind one another, and go behind buildings or into shadowed areas. Additional challenges include Move-Stop-Move, parallax, and track association with highly similar targets. These challenges need to be overcome with up to a thousand vehicles, so processing speed is crucial. The project is Open-Source to aid in overcoming these technical challenges. Alternative trackers (IMM, MHT), features, association methods, track-initiation and deletion (M/N or LU), state variables, or other specialized routines (for Move-Stop-Move, parallax, etc.) will be tried and analyzed with representative data. By keeping it Open-Source, any ideas to improve the system can be easily implemented and analyzed. This paper presents current findings and state of the project.

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

2007-04-01

182

Reducing antenna mechanical noise in precision spacecraft tracking  

NASA Astrophysics Data System (ADS)

Doppler tracking of deep space probes is central to spacecraft navigation and many radio science investigations. The most sensitive Doppler observations to date were taken using the NASA/JPL Deep Space Network antenna DSS 25 (a 34 m diameter beam-waveguide station instrumented with simultaneous X- and Ka-band uplink and tropospheric scintillation calibration equipment) tracking the Cassini spacecraft. Those observations achieved Doppler fractional frequency stability (Doppler frequency fluctuation divided by center frequency, ?f/fo) ? 3 X 10-15 at 1000 s integration time. The leading noise in these very-high-sensitivity tracks was time-dependent unmodeled motion of the ground antenna's phase center (caused, e.g., by antenna sag as elevation angle changes, unmodeled subreflector motion, wind loading, bulk motion of the antenna as it rolled over irregularities in its azimuth ring, etc.). This antenna mechanical noise has seemed irreducible since it is not clear how to build a large, moving, steel structure with intrinsic mechanical stability better than that of current tracking stations. Here we show how intrinsic mechanical noise of a large tracking antenna can be suppressed when two-way Doppler tracking data and receive-only Doppler data from a stiffer antenna are combined with suitable delays. Using this time delay correction procedure, the mechanical noise in the final Doppler observable can be reduced to that of the stiffer antenna. We demonstrate proof-of-concept experimentally and briefly discuss some practical considerations.

Armstrong, J. W.; Estabrook, F. B.; Asmar, S. W.; Iess, L.; Tortora, P.

2008-06-01

183

Eye-Tracking.  

ERIC Educational Resources Information Center

Reviews the eye-movement paradigm and refers to recent experiments applying the paradigm to issues of spoken word recognition (e.g., lexical competitor effects), syntactic processing, reference resolution, focus, as well as issues in cross-modality integration that are central to evaluating the modularity hypothesis. (Seven references) (Author/CK)

Tanenhaus, Michael K.; Spivey-Knowlton, Michael J.

1996-01-01

184

Oral Presentation Track 1: Bone Mechanics -Joint ESB Track  

E-print Network

and stiffness of cancellous bone are key determinants of the fracture risk. However, standard imaging (DEXA, QCT (FE) modeling of cancellous bone, which is expected to support clinical assessment of the fractureOral Presentation Track 1: Bone Mechanics - Joint ESB Track 1.1. Advanced Detection of Bone Quality

Gefen, Amit

185

Mobile manipulation using tracks of a tracked mobile robot  

Microsoft Academic Search

This paper presents the investigation on mobile manipulation of a self-reconfigurable tracked mobile robot, using its tracks for both manipulation and locomotion. It is desirable for a mobile robot to possess manipulation capability in unstructured environments, especially in the scenario which is unsuitable for human beings. However, it is not convenient for such a mobile robot to carry an onboard

Yugang Liu; Guangjun Liu

2009-01-01

186

Use of EEG to track visual attention in two dimensions  

NASA Astrophysics Data System (ADS)

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.

Coleman, Robert Alan

187

Video Image Tracking Engine  

NASA Technical Reports Server (NTRS)

A method and system for processing an image including capturing an image and storing the image as image pixel data. Each image pixel datum is stored in a respective memory location having a corresponding address. Threshold pixel data is selected from the image pixel data and linear spot segments are identified from the threshold pixel data selected.. Ihe positions of only a first pixel and a last pixel for each linear segment are saved. Movement of one or more objects are tracked by comparing the positions of fust and last pixels of a linear segment present in the captured image with respective first and last pixel positions in subsequent captured images. Alternatively, additional data for each linear data segment is saved such as sum of pixels and the weighted sum of pixels i.e., each threshold pixel value is multiplied by that pixel's x-location).

Howard, Richard T. (Inventor); Bryan, ThomasC. (Inventor); Book, Michael L. (Inventor)

2004-01-01

188

Human tracking in thermal catadioptric omnidirectional vision  

Microsoft Academic Search

We propose to explore a novel tracking system for human tracking in thermal catadioptric omnidirectional (TCO) vision, which is able to realize the surveillance in all-weather and wide field of view conditions. In contrast, previous human tracking system mainly focuses on tracking in conventional imaging system. In this paper, the proposed tracking method adopts the classification posterior probability of Support

Yazhe Tang; Youfu Li; Tianxiang Bai; Xiaolong Zhou; Zhongwei Li

2011-01-01

189

Teacher's Guide for Tracks. Elementary Science Study.  

ERIC Educational Resources Information Center

This teacher's guide suggests activities that provide opportunities for students in grades 4-6 to study animal tracks. Methods are explained for using sets of 52 Track Cards which show life-size drawings of tracks made by 14 animals; sets of 10 large Mystery Track Cards with life-size drawings of the prints of large mammals; and a Track Picture

Alexander, David; And Others

190

Fast Track Dredged Material Decontamination  

E-print Network

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 .............................................................................. 3 3.3 Relation to the U.S. Army Corps of Engineers-New York District Dredged Material Management

Brookhaven National Laboratory

191

Making Sense of Dinosaur Tracks  

ERIC Educational Resources Information Center

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

MacKenzie, Ann Haley; McDowell, Brian

2012-01-01

192

Video Tracking: A Concise Survey  

Microsoft Academic Search

This paper addresses video tracking, the problem of following moving targets automatically over a video sequence, and brings three main contributions. First, we give a concise introduction to video tracking in computer vision, including design requirements and a review of recent techniques, with some details of selected algorithms. Second, we give an overview of 28 recent papers on subsea video

Emanuele Trucco; Konstantinos Plakas

2006-01-01

193

Choosing a track association method  

Microsoft Academic Search

This paper examines the problem of selecting a track association method. This is the first stage of the track fusion process and the performance of such a method is essential to the overall success of this process. It is shown that more issues must be considered than just examining the probability of correct association when judging the performance of an

Barbara F. La Scala; Alfonso Farina

2002-01-01

194

COCOA - Tracking in Aerial Imagery  

Microsoft Academic Search

Unmanned Aerial Vehicles (UAVs) are becoming a core intelligence asset for reconnaissance, surveillance and target tracking in urban and battlefleld settings. In order to achieve the goal of automated tracking of objects in UAV videos we have developed a system called COCOA. It processes the video stream through number of stages. At flrst stage platform motion compensation is performed. Moving

Saad Ali; Mubarak Shah

2005-01-01

195

Network exploitation using WAMI tracks  

Microsoft Academic Search

Creating and exploiting network models from wide area motion imagery (WAMI) is an important task for intelligence analysis. Tracks of entities observed moving in the WAMI sensor data are extracted, then large numbers of tracks are studied over long time intervals to determine specific locations that are visited (e.g., buildings in an urban environment), what locations are related to other

Ray Rimey; Jim Record; Dan Keefe; Levi Kennedy; Chris Cramer

2011-01-01

196

Geoanalytic applications of particle tracks  

Microsoft Academic Search

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

David E. Fisher

1975-01-01

197

Buyer's Guide for Track Construction.  

ERIC Educational Resources Information Center

This buyers guide provides information on needs assessment, buying options, and decision making tips when acquiring a new school athletic track. Among the topics covered are developing a budget, choosing a site selection, choosing a track surface, developing working specifications, and selecting a contractor. Also explored is the question of

United States Tennis Court & Track Builders Association.

198

A special Track in Bioinformatics  

E-print Network

ITNG 2007 A special Track in Bioinformatics Within the 4th International Conference on Information _________________________________________________________________________________ In this track, we are interested in gathering and collecting high quality research in Bioinformatics: biological and practitioners in Bioinformatics to submit papers that represent original and high quality work within

Al-Mubaid, Hisham

199

Tracking through changes in scale  

Microsoft Academic Search

We propose a tracking system that is especially well-suited to track- ing targets which change drastically in size or appearance. To ac- complish this, we employ a fast, two phase template matching algo- rithm along with a periodic template update method. The template matching step ensures accurate localization while the template up- date scheme allows the target model to change

Shawn Lankton; James Malcolm; Arie Nakhmani; Allen Tannenbaum

2008-01-01

200

Raptor Center: Migration Tracking  

NSDL National Science Digital Library

Part of the larger University of Minnesota Raptor Center site, this site features regularly updated location information on individual Hawks first captured on their breeding grounds in western Minnesota; they migrate to wintering grounds in central South America. Almost daily information is relayed from the birds to an Argos satellite, then to a receiving station in Maryland and finally to the Raptor Center. Users can follow 1996 individuals from St. Paul, MN to Caimanes, Bolivia.

1997-01-01

201

COCOA: tracking in aerial imagery  

NASA Astrophysics Data System (ADS)

Unmanned Aerial Vehicles (UAVs) are becoming a core intelligence asset for reconnaissance, surveillance and target tracking in urban and battlefield settings. In order to achieve the goal of automated tracking of objects in UAV videos we have developed a system called COCOA. It processes the video stream through number of stages. At first stage platform motion compensation is performed. Moving object detection is performed to detect the regions of interest from which object contours are extracted by performing a level set based segmentation. Finally blob based tracking is performed for each detected object. Global tracks are generated which are used for higher level processing. COCOA is customizable to different sensor resolutions and is capable of tracking targets as small as 100 pixels. It works seamlessly for both visible and thermal imaging modes. The system is implemented in Matlab and works in a batch mode.

Ali, Saad; Shah, Mubarak

2006-05-01

202

Performance Evaluation of Vision-Based High DOF Human Movement Tracking: A Survey And Human Computer Interaction Perspective  

Microsoft Academic Search

Accurate tracking of human movement has the potential to enable many kinds of human-computer interaction (HCI). Vision-based methods promise tracking without encumberance by body-mounted apparatus but constitute a significant research challenge. Its many applications both in HCI and other areas such as surveillance have made markerless human tracking a central problem in computer vision. Despite this research focus, there are

Daniel Heckenberg

2006-01-01

203

An A Posteriori Error Estimator for Adaptive Mesh Refinement Using Parallel In-Element Particle Tracking Methods  

Microsoft Academic Search

Particle tracking methods are a versatile computational technique central to the simulation of a wide range of scientific\\u000a applications. In this paper we present an a posteriori error estimator for adaptive mesh refinement (AMR) using particle tracking methods. The approach uses a parallel computing\\u000a framework, the in-element particle tracking method, based on the assumption that particle trajectories are computed by

Jing-ru C. Cheng; Paul E. Plassmann

2002-01-01

204

Thermal evolution of inverted basins: Constraints from apatite fission track thermochronology in the Cuyo Basin, Argentine Precordillera  

Microsoft Academic Search

Apatite fission track thermochronology (AFTT) was applied to derive the thermal history of formation and inversion of the oil-bearing TriassicCretaceous Cuyo Basin, Argentine Precordillera. The obtained central fission track ages range from 13 to 163Ma, and the mean track lengths from 8.2 to 13.1?m. Based on the integration of AFTT, stratigraphic and structural data, five evolutionary phases are here proposed

J. N. vila; F CHEMALEJR; G. Mallmann; A. W. Borba; F. F. Luft

2005-01-01

205

Central Pain Syndrome  

MedlinePLUS

NINDS Central Pain Syndrome Information Page Table of Contents (click to jump to sections) What is Central Pain Syndrome? Is there ... being done? Clinical Trials Organizations What is Central Pain Syndrome? Central pain syndrome is a neurological condition ...

206

Video Resources Central Asia  

E-print Network

Video Resources Central Asia � Central Asia Country Overviews: https://archive.org/details/central-asia phase of political and economic change, what new partnership opportunities will emerge? https://archive.org/details/Europe_And_Central_Asia

Qian, Ning

207

Track grouping to enhance moving target exploitation  

NASA Astrophysics Data System (ADS)

The Northrop Grumman Track Grouper provides an effective solution to the track grouping problem because it successfully forms track aggregates that decrease display clutter and enhance the battle management picture. The Track Grouper is a formation group tracking algorithm that makes track-to-track comparisons to create and update group membership. The benefits of this approach are conservation of computer resources and preservation of individual target positions. The Track Grouper reduces the adverse effects of measurement mis-correlations and false alarms because it uses estimated tracks instead of noisy sensor measurements. The Track Grouper uses a series of kinematic gates and three primary sub-functions (assign, split, and merge) to determine group membership and maintain group ID, history, and ancestry. The Track Grouper successfully overcomes the challenges of group tracking and provides a key battle management tool that enhances Moving Target Exploitation.

Sassman, Steven M.

2000-07-01

208

Multiple mice tracking using Microsoft Kinect  

E-print Network

Mouse tracking is integral to any attempt to automate mouse behavioral analysis in neuroscience. Systems that rely on vision have successfully tracked a single mouse in one cage[10], but when attempting to track multiple ...

Wang, Chun-Kai, M. Eng. Massachusetts Institute of Technology

2013-01-01

209

Debate Central  

NSDL National Science Digital Library

Courtesy of the National Center for Policy Analysis (NCPA), Debate-Central.org offers resources related to this year's National Forensic League high school debate topic: "Resolved: That the United States federal government should establish a foreign policy significantly limiting the use of weapons of mass destruction." The site, which is updated daily, features a wealth of links sorted into ten categories (each of which is further divided into subcategories). Resources are collected from periodicals, think tanks, and other sources, and the collection should be useful not just for debaters but for anyone looking for authoritative resources on these topics. Other debate topics are listed on the right-hand side of the page, though these are covered in a less comprehensive manner. Also at the site is a bulletin board, through which users can ask questions of experts such as Dr. Hans Mark, former Secretary of the Air Force and Deputy Administrator of NASA, and a link to NCPA's Terrorism in America site. NCPA's mission is "to develop and promote private alternatives to government regulation and control, solving problems by relying on the strength of the competitive, entrepreneurial private sector."

2001-01-01

210

Patrol car and agent tracking/suspect tagging and tracking  

NASA Astrophysics Data System (ADS)

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.

Wilkins, Steven C.

1997-01-01

211

Tracking harmonic notch filter  

SciTech Connect

An electronic filter for automatically tracking and removing harmonically related interfering electrical signals such as power-line interference harmonics without attenuating other signals of interest even though the signals are frequency stable and/or near the interference signal frequencies. The filter comprises a very narrow band electronic commutated capacitor-bank comb-notch filter driven by a counter/decoder circuit which is in turn driven by a phase locked loop. The filter also comprises two narrow-band analog filters tuned to the two lowest harmonics of the interfering signal. The summed output of these two filters is applied to the input of the phase-locked loop. The phase-locked loop locks to the proper multiple of the interfering signal and drives the comb notch filter at a frequency which causes it to generate notches at unit multiples of the fundamental of the interference frequency. This action is continuous such that center frequencies of the notches are automatically adjusted to compensate for small variations in the interference frequency.

Eno, F.

1989-03-20

212

Fluorescent image tracking velocimeter  

DOEpatents

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.

Shaffer, Franklin D. (Library, PA)

1994-01-01

213

The Qweak tracking system  

SciTech Connect

The Q{sub weak}{sup p} experiment will measure the parity-violating elastic e-p scattering asymmetry to extract the weak charge of the proton. The experiment employs a toroidal magnet to focus electrons scattered at 8{sup o} {+-} 2{sup o}, corresponding to Q{sup 2} {approx} 0.03 (GeV/c){sup 2}, on eight Cerenkov detectors located in the focal plane of the spectrometer. Since the asymmetry is proportional to Q{sup 2}, it is crucial to obtain an accurate measure of the acceptance-averaged value of Q{sup 2}. A tracking system will be used in a low-rate counting mode, allowing individual events to be observed. This will enable a determination of the average Q{sup 2} by measuring the scattering angle and interaction vertex, for mapping the response across the surface of the Cerenkov detectors, and for the dilution of the Cerenkov detector signal by background.

K.H. Grimm; Qweak Collaboration

2005-02-01

214

Neural network tracking and extension of positive tracking periods  

NASA Technical Reports Server (NTRS)

Feature detectors have been considered for the role of supplying additional information to a neural network tracker. The feature detector focuses on areas of the image with significant information. Basically, if a picture says a thousand words, the feature detectors are looking for the key phrases (keypoints). These keypoints are rotationally invariant and may be matched across frames. Application of these advanced feature detectors to the neural network tracking system at JPL has promising potential. As part of an ongoing program, an advanced feature detector was tested for augmentation of a neural network based tracker. The advance feature detector extended tracking periods in test sequences including aircraft tracking, rover tracking, and simulated Martian landing. Future directions of research are also discussed.

Hanan, Jay C.; Chao, Tien-Hsin; Moreels, Pierre

2004-01-01

215

High-dynamic GPS tracking  

NASA Technical Reports Server (NTRS)

The results of comparing four different frequency estimation schemes in the presence of high dynamics and low carrier-to-noise ratios are given. The comparison is based on measured data from a hardware demonstration. The tested algorithms include a digital phase-locked loop, a cross-product automatic frequency tracking loop, and extended Kalman filter, and finally, a fast Fourier transformation-aided cross-product frequency tracking loop. The tracking algorithms are compared on their frequency error performance and their ability to maintain lock during severe maneuvers at various carrier-to-noise ratios. The measured results are shown to agree with simulation results carried out and reported previously.

Hinedi, S.; Statman, J. I.

1988-01-01

216

High resolution track etch autoradiography  

DOEpatents

A detector assembly 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.

Solares, Guido (Arlington, MA); Zamenhof, Robert G. (Brookline, MA)

1994-01-01

217

The Automatic Library Tracking Database  

SciTech Connect

A library tracking database has been developed and put into production at the National Institute for Computational Sciences and the Oak Ridge Leadership Computing Facility (both located at Oak Ridge National Laboratory.) The purpose of the library tracking database is to track which libraries are used at link time on Cray XT5 Supercomputers. The database stores the libraries used at link time and also records the executables run in a batch job. With this data, many operationally important questions can be answered such as which libraries are most frequently used and which users are using deprecated libraries or applications. The infrastructure design and reporting mechanisms are presented along with collected production data.

Fahey, Mark R [ORNL; Jones, Nicholas A [ORNL; Hadri, Bilel [ORNL

2010-01-01

218

Abrasion resistant track shoe grouser  

DOEpatents

A track shoe for a track-type vehicle. The track shoe includes a base plate and a grouser projecting away from the base plate. A capping surface structure of substantially horseshoe shaped cross-section is disposed across a distal portion of the grouser. The capping surface structure covers portions of a distal edge surface and adjacent lateral surfaces. The capping surface structure is formed from an material characterized by enhanced wear resistance relative to portions of the grouser underlying the capping surface structure.

Fischer, Keith D; Diekevers, Mark S; Afdahl, Curt D; Steiner, Kevin L; Barnes, Christopher A

2013-04-23

219

Aging in large CDF tracking chambers  

NASA Astrophysics Data System (ADS)

The experience of the Collider Detector at Fermilab (CDF) with aging in the large axial drift chamber responsible for tracking in the central region is presented. Premature aging in the Run 1 chamber was observed after only 0.02 C/cm. After cleaning much of the gas system and making modifications to reduce aerosols from the alcohol bubbler, the observed aging rate fell dramatically in test chambers. Considerable effort has been made to better understand the factors that affect aging since the replacement chamber for Run 2 will accumulate about 1.0 C/cm. Current test chambers using the full CDF gas system show aging rates of less than 5%/C/cm.

Binkley, M.; Wagner, R. L.; Mukherjee, A.; Ambrose, D.; Bauer, G.; Khazins, D. M.; Atac, M.

2003-12-01

220

Aging in large CDF tracking chambers  

SciTech Connect

The experience of the Collider Detector at Fermilab (CDF) with aging in the large axial drift chamber responsible for tracking in the central region is presented. Premature aging in the Run 1 chamber was observed after only 0.02 C/cm. After cleaning much of the gas system and making modifications to reduce aerosols from the alcohol bubbler, the observed aging rate fell dramatically in test chambers. Considerable effort has been made to better understand the factors that affect aging since the replacement chamber for Run 2 will accumulate about 1.0 C/cm. Current test chambers using the full CDF gas system show aging rates of less than 5%/C/cm.

M. Binkley et al.

2001-03-19

221

Iceland hotspot track  

NASA Astrophysics Data System (ADS)

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.

Lawver, Lawrence A.; Dietmar Mller, R.

1994-04-01

222

Environmental exposure tracking sensor  

NASA Astrophysics Data System (ADS)

Cornerstone Research Group Inc. (CRG) has developed environmental exposure tracking (EET) sensors using shape memory polymer (SMP) to monitor the degradation of perishable items, such as munitions, medicines or foods, by measuring the cumulative exposure to temperature and moisture. SMPs are polymers whose qualities have been altered to give them dynamic shape "memory" properties. Under thermal or moisture stimuli, SMP exhibits a radical change from a rigid thermoset to a highly flexible, elastic state. The dynamic response of the SMP can be tailored to match the degradation profile of the perishable item. SMP-based EET sensors require no digital memory or internal power supply and provide the capability of inexpensive, long-term life cycle monitoring thermal and moisture exposure over time. In a Phase I and II SBIR effort with the Navy, CRG demonstrated the feasibility of SMP-based EET sensor with two material systems. These material systems required different activation stimuli, heat or water vapor pressure. CRG developed the ability to tailor these materials to customize the dynamic response to match various degradation profiles of munitions. CRG optimized and characterized the SMP formulations and sensor design configuration to develop a suite of data from which any degradation profile can be met. CRG's EET sensors are capable of monitoring temperatures from -30 C to 260 C. The prototypes monitor cumulative thermal exposure and provide real-time information in a visually readable or a remotely interrogated version. CRG is currently scaling up the manufacture of the sensors for munitions reliability applications with the Navy.

Havens, Teresa; Everhart, Joel; McFerran, Jace

2009-03-01

223

Lindsay Benko Mintenko track & field  

E-print Network

swimming Lindsay Benko Mintenko track & field Quincy Watts water polo Bob Hughes spirit Dr. Arthur baseball Randy Johnson 2012 hall of fame inductees golf Jill McGill volleyball Bryan Ivie media Steve

Wang, Hai

224

Model-assisted object tracking  

NASA Astrophysics Data System (ADS)

Many current video analysis systems fail to fully acknowledge the process that resulted in the acquisition of the video data, i.e. they don't view the complete multimedia system that encompasses the several physical processes that lead to the captured video data. This multimedia system includes the physical process that created the appearance of the captured objects, the capturing of the data by the sensor (camera), and a model of the domain the video data belongs to. By modelling this complete multimedia system, a much more robust and theoretically sound approach to video analysis can be taken. In this paper we will describe such a system for the detection, recognition and tracking of objects in video's. We will introduce an extension of the mean shift tracking process, based on a detailed model of the video capturing process. This system is used for two applications in the soccer video domain: Billboard recognition and tracking and player tracking.

Aldershoff, Frank; Gevers, Theo; Prins, Philip

2005-01-01

225

Model-assisted object tracking  

NASA Astrophysics Data System (ADS)

Many current video analysis systems fail to fully acknowledge the process that resulted in the acquisition of the video data, i.e. they don't view the complete multimedia system that encompasses the several physical processes that lead to the captured video data. This multimedia system includes the physical process that created the appearance of the captured objects, the capturing of the data by the sensor (camera), and a model of the domain the video data belongs to. By modelling this complete multimedia system, a much more robust and theoretically sound approach to video analysis can be taken. In this paper we will describe such a system for the detection, recognition and tracking of objects in video's. We will introduce an extension of the mean shift tracking process, based on a detailed model of the video capturing process. This system is used for two applications in the soccer video domain: Billboard recognition and tracking and player tracking.

Aldershoff, Frank; Gevers, Theo; Prins, Philip

2004-12-01

226

Master track Theoretical Biology & Bioinformatics  

E-print Network

Master track Theoretical Biology & Bioinformatics Modeling and bioinformatics is an important Biology & Bioinformatics provides courses introducing you to the basic concepts of modeling and bioinformatics, and offers research projects in which you will study how complex biological systems function

Utrecht, Universiteit

227

Multitarget tracking algorithm performance evaluation  

NASA Astrophysics Data System (ADS)

This paper discusses some problems in evaluating the performance of multi-target tracking (MTT) systems. Various performance measures for the MTT systems are first described. These include: correlation statistics; track purity; track maintenance statistics; and kinematic statistics. Examples of single measures of performance are also given. The issues involved in the analytical prediction of performance are briefly discussed. Detailed descriptions of the computer simulation evaluation for the MTT systems include: test scenario selection, sensor modeling, data collection and the analysis of results. Two performam evaluation methods, namely: a two step method and a track classification approach are explored in this paper. The performam evaluation techniques are being incorporated in a MTT testbed developed in the Department of Electrical and Computer Engineering at the Royal Military College of Canada, Kingston, Ontario, Canada.

Zheng, H.; Farooq, Mohamad; Main, Rick R.

1999-03-01

228

Solar Angles and Tracking Systems  

NSDL National Science Digital Library

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.

Integrated Teaching And Learning Program

229

The Physics of Fast Track  

ERIC Educational Resources Information Center

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.

Kibble, Bob

2007-01-01

230

De-centralized and centralized control for realistic EMS Maglev systems  

NASA Astrophysics Data System (ADS)

A comparative study of de-centralized and centralized controllers when used with real EMS Maglev Systems is introduced. This comparison is divided into two parts. Part I is concerned with numerical simulation and experimental testing on a two ton six-magnet EMS Maglev vehicle. Levitation and lateral control with these controllers individually and when including flux feedback control in combination with these controllers to enhance stability are introduced. The centralized controller is better than the de-centralized one when the system is exposed to a lateral disturbing force such as wind gusts. The flux feedback control when combined with de-centralized or centralized controllers does improve the stability and is more resistant and robust with respect to the air gap variations. Part II is concerned with the study of Maglev vehicle-girder dynamic interaction system and the comparison between these two controllers on this typical system based on performance and ride quality achieved. Numerical simulations of the ODU EMS Maglev vehicle interacting with girder are conducted with these two different controllers. The de-centralized and centralized control for EMS Maglev systems that interact with a flexible girder provides similar ride quality. Centralized control with flux feedback could be the best controller for the ODU Maglev system when operating on girder. The centralized control will guarantee the suppression of the undesired lateral displacements; hence it will provide smoother ride quality. Flux feedback will suppress air gap variations due to the track discontinuities.

Moawad, Mohamed M. Aly M.

231

Tracking People in Broadcast Sports  

Microsoft Academic Search

\\u000a We present a method for tracking people in monocular broadcast sports videos by coupling a particle filter with a vote-based\\u000a confidence map of athletes, appearance features and optical flow for motion estimation. The confidence map provides a continuous\\u000a estimate of possible target locations in each frame and outperforms tracking with discrete target detections. We demonstrate\\u000a the tracker on sports videos,

Angela Yao; Dominique Uebersax; Juergen Gall; Luc J. Van Gool

2010-01-01

232

Calculation of a tracking force  

SciTech Connect

The original calculation (1975-76) of an electromagnetic mechanism for beam-channel tracking is presented. The system model is not realistic because only a flat profile channel which completely encloses the beam is considered. However, a clear demonstration of the existence of a tracking force is made, as a point of departure for the more recent studies which incorporate a realistic model of the beam head and conductivity profile.

Lee, E.P.

1983-01-10

233

The extended tracking network and indications of baseline precision and accuracy in the North Andes  

NASA Technical Reports Server (NTRS)

The CASA Uno Global Positioning System (GPS) experiment (January-February 1988) included an extended tracking network which covered three continents in addition to the network of scientific interest in Central and South America. The repeatability of long baselines (400-1000 km) in South America is improved by up to a factor of two in the horizontal vector baseline components by using tracking stations in the Pacific and Europe to supplement stations in North America. In every case but one, the differences between the mean solutions obtained using different tracking networks was equal to or smaller than day-to-day rms repeatabilities for the same baselines. The mean solutions obtained by using tracking stations in North America and the Pacific agreed at the 2-3 millimeter level with those using tracking stations in North America and Europe. The agreement of the extended tracking network solutions suggests that a broad distribution of tracking stations provides better geometric constraints on the satellite orbits and that solutions are not sensitive to changes in tracking network configuration when an extended network is use. A comparison of the results from the North Andes and a baseline in North America suggests that the use of a geometrically strong extended tracking network is most important when the network of interest is far from North America.

Freymueller, Jeffrey T.; Kellogg, James N.

1990-01-01

234

SLR tracking of GPS-35  

NASA Astrophysics Data System (ADS)

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.

Pavlis, Erricos C.

1994-11-01

235

Near real time satellite tracking of striped marlin ( Kajikia audax ) movements in the Pacific Ocean  

Microsoft Academic Search

High-resolution satellite locations were obtained from striped marlin using Argos transmitters attached to the upper lobe\\u000a of the caudal fin. Twenty-six striped marlin were tagged off New Zealand (20052007) and tracked as far as the central Pacific\\u000a Ocean. Caudal fin mounted Argos tags generated 1,524 locations during a total of 659 tracking days [mean 25 (21.24) days\\u000a per fish and

John C. Holdsworth; Tim J. Sippel; Barbara A. Block

2009-01-01

236

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

237

The Central laser facility at the Pierre Auger Observatory  

SciTech Connect

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.

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

238

The inclusion of higher degree and order gravity terms in the design of a repeat ground track orbit  

NASA Technical Reports Server (NTRS)

Mean Orbit Elements can be chosen such that a desired ground track repeat criteria is obtained when propagating with the secular effects of a central body gravity field. If the proper initial conditions are chosen that correspond to these Mean Elements, the orbit can also be propagated with the full gravity field and form another ground track repeat pattern. Further, if the effects of other perturbative forces are compensated for, such that the ground track remains near this pattern, the central body effects can again be considered repetitive. The process of arriving at these conclusions, along with the supporting numerical simulations, are presented.

Vincent, Mark A.

1990-01-01

239

Tracking Dynamic Boundaries Using Sensor Network  

Microsoft Academic Search

We examine the problem of tracking dynamic boundaries occurring in natural phenomena using a network of range sensors. Two main challenges of the boundary tracking problem are accurate boundary estimation from noisy observations and continuous tracking of the boundary. We propose Dynamic Boundary Tracking (DBTR), an algorithm that combines the spatial estimation and temporal estimation techniques. The regression-based spatial estimation

Subhasri Duttagupta; Krithi Ramamritham; Purushottam Kulkarni

2011-01-01

240

Attentional Costs in Multiple-Object Tracking  

ERIC Educational Resources Information Center

Attentional demands of multiple-object tracking were demonstrated using a dual-task paradigm. Participants were asked to make speeded responses based on the pitch of a tone, while at the same time tracking four of eight identical dots. Tracking difficulty was manipulated either concurrent with or after the tone task. If increasing tracking

Tombu, Michael; Seiffert, Adriane E.

2008-01-01

241

Page 2 of 52 National Tracking Network  

E-print Network

#12;TNIP 2010 Page 2 of 52 National Tracking Network Implementation Plan 2010 Environmental Public Health Tracking Network TNIP 2010 #12;TNIP 2010 Page 3 of 52 CONTENTS 1. Introduction......................................................................................................................................................4 1.1. Overview of the Technical Infrastructure of the Tracking Network and State/local Tracking

242

Tracking Conductors Hand Movements Using Multiple Wiimotes  

Microsoft Academic Search

In this paper, we present the design and validation of a 3D tracking system using a commercially available game controller. The system uses the wiimote to track and analyze a conductorpsilas hand movement and the Wii Balance Board to track conductorpsilas balance shifts. The wiimote provides an easily attainable controller that has both accelerometer motion sensors and infrared tracking capabilities.

David Bradshaw; Kia Ng

2008-01-01

243

3D Tracking via Body Radio Reflections  

E-print Network

This paper introduces WiTrack, a system that tracks the 3D motion of a user from the radio signals reflected off her body. It works even if the person is occluded from the WiTrack device or in a different room. WiTrack ...

Adib, Fadel

2013-12-11

244

Simultaneous Localization, Mapping and Moving Object Tracking  

Microsoft Academic Search

Simultaneous localization, mapping and moving object tracking (SLAMMOT) involves both simultaneous localization and mapping (SLAM) in dynamic en- vironments and detecting and tracking these dynamic objects. In this paper, we establish a mathematical framework to integrate SLAM and moving ob- ject tracking. We describe two solutions: SLAM with generalized objects, and SLAM with detection and tracking of moving objects (DATMO).

Chieh-chih Wang; Charles E. Thorpe; Sebastian Thrun; Martial Hebert; Hugh F. Durrant-whyte

2007-01-01

245

Blood flow tracking using optical correlation techniques  

Microsoft Academic Search

It has been previously shown that tracking small particle motion can be accomplished by tracking the speckle pattern it produces. The joint transform correlator and the Sandia National Laboratories (SNL) acoustooptic correlator that were used to track speckle motion are described. Results demonstrate that optical correlation is capable of tracking speckle with an accuracy comparable to digital methods. Optical correlation

N. Clark; M. K. Giles; S. H. Harrison; C. P. Hofer

1992-01-01

246

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.

2010-09-21

247

UUV-platform cooperation in covert tracking  

NASA Astrophysics Data System (ADS)

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.

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

2005-09-01

248

Tracking scanning laser ophthalmoscope (TSLO)  

NASA Astrophysics Data System (ADS)

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.

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

2003-07-01

249

Development of an Analytical Tool for Track Component Response (I-TRACK)  

E-print Network

Vertical Deflection Inputs Outputs Track Lateral Deflection Clamping Force (Gauge and Field Side) Clip Max's Modulus Track Vertical Deflection Inputs Outputs Track Lateral Deflection Clamping Force (Gauge and FieldDevelopment of an Analytical Tool for Track Component Response (I-TRACK) Thiago B. do Carmo, J

Barkan, Christopher P.L.

250

Dynamic Denoising of Tracking Sequences  

PubMed Central

In this paper, we describe an approach to the problem of simultaneously enhancing image sequences and tracking the objects of interest represented by the latter. The enhancement part of the algorithm is based on Bayesian wavelet denoising, which has been chosen due to its exceptional ability to incorporate diverse a priori information into the process of image recovery. In particular, we demonstrate that, in dynamic settings, useful statistical priors can come both from some reasonable assumptions on the properties of the image to be enhanced as well as from the images that have already been observed before the current scene. Using such priors forms the main contribution of the present paper which is the proposal of the dynamic denoising as a tool for simultaneously enhancing and tracking image sequences. Within the proposed framework, the previous observations of a dynamic scene are employed to enhance its present observation. The mechanism that allows the fusion of the information within successive image frames is Bayesian estimation, while transferring the useful information between the images is governed by a Kalman filter that is used for both prediction and estimation of the dynamics of tracked objects. Therefore, in this methodology, the processes of target tracking and image enhancement collaborate in an interlacing manner, rather than being applied separately. The dynamic denoising is demonstrated on several examples of SAR imagery. The results demonstrated in this paper indicate a number of advantages of the proposed dynamic denoising over static approaches, in which the tracking images are enhanced independently of each other. PMID:18482881

Michailovich, Oleg; Tannenbaum, Allen

2009-01-01

251

Dynamic denoising of tracking sequences.  

PubMed

In this paper, we describe an approach to the problem of simultaneously enhancing image sequences and tracking the objects of interest represented by the latter. The enhancement part of the algorithm is based on Bayesian wavelet denoising, which has been chosen due to its exceptional ability to incorporate diverse a priori information into the process of image recovery. In particular, we demonstrate that, in dynamic settings, useful statistical priors can come both from some reasonable assumptions on the properties of the image to be enhanced as well as from the images that have already been observed before the current scene. Using such priors forms the main contribution of the present paper which is the proposal of the dynamic denoising as a tool for simultaneously enhancing and tracking image sequences. Within the proposed framework, the previous observations of a dynamic scene are employed to enhance its present observation. The mechanism that allows the fusion of the information within successive image frames is Bayesian estimation, while transferring the useful information between the images is governed by a Kalman filter that is used for both prediction and estimation of the dynamics of tracked objects. Therefore, in this methodology, the processes of target tracking and image enhancement "collaborate" in an interlacing manner, rather than being applied separately. The dynamic denoising is demonstrated on several examples of SAR imagery. The results demonstrated in this paper indicate a number of advantages of the proposed dynamic denoising over "static" approaches, in which the tracking images are enhanced independently of each other. PMID:18482881

Michailovich, Oleg; Tannenbaum, Allen

2008-06-01

252

Feature Tracking Using Reeb Graphs  

SciTech Connect

Tracking features and exploring their temporal dynamics can aid scientists in identifying interesting time intervals in a simulation and serve as basis for performing quantitative analyses of temporal phenomena. In this paper, we develop a novel approach for tracking subsets of isosurfaces, such as burning regions in simulated flames, which are defined as areas of high fuel consumption on a temperature isosurface. Tracking such regions as they merge and split over time can provide important insights into the impact of turbulence on the combustion process. However, the convoluted nature of the temperature isosurface and its rapid movement make this analysis particularly challenging. Our approach tracks burning regions by extracting a temperature isovolume from the four-dimensional space-time temperature field. It then obtains isosurfaces for the original simulation time steps and labels individual connected 'burning' regions based on the local fuel consumption value. Based on this information, a boundary surface between burning and non-burning regions is constructed. The Reeb graph of this boundary surface is the tracking graph for burning regions.

Weber, Gunther H.; Bremer, Peer-Timo; Day, Marcus S.; Bell, John B.; Pascucci, Valerio

2010-08-02

253

Super-Resolution Track Density Imaging of Glioblastoma: Histopathologic Correlation  

PubMed Central

BACKGROUND AND PURPOSE Super-resolution track density imaging generates anatomic images with submillimeter voxel resolution by using high-angular-resolution diffusion imaging and fiber-tractography. TDI within the diseased human brain has not been previously described. The purpose of this study was to correlate TDI with histopathologic features of GBM. MATERIALS AND METHODS A total of 43 tumor specimens (24 contrast-enhancing, 12 NE, and 7 centrally necrotic regions) were collected from 18 patients with treatment-nave GBM by use of MR imagingguided neurosurgical techniques. Immunohistochemical stains were used to evaluate the following histopathologic features: hypoxia, architectural disruption, microvascular hyperplasia, and cellular proliferation. We reconstructed track density maps at a 0.25-mm isotropic spatial resolution by using probabilistic streamline tractography combined with constrained spheric deconvolution (model order, 8; 0.1-mm step size; 1 million seed points). Track density values were obtained from each tissue site. A P value of .05 was considered significant and was adjusted for multiple comparisons by use of the false discovery rate method. RESULTS Track density was not significantly different between contrast-enhancing and NE regions but was more likely to be elevated within regions demonstrating aggressive histopathologic features (P < .05). Significant correlation between relative track density and hypoxia (odds ratio, 3.52; P = .01), architectural disruption (odds ratio, 3.49; P = .03), and cellular proliferation (odds ratio, 1.70; P = .05) was observed irrespective of the presence or absence of contrast enhancement. CONCLUSIONS Numeric values of track density correlate with GBM biologic features and may be clinically useful for identification of regions of tumor infiltration within both enhancing and NE components of GBM. PMID:23413250

Barajas, R.F.; Hess, C.P.; Phillips, J.J.; Von Morze, C.J.; Yu, J.P.; Chang, S.M.; Nelson, S.J.; McDermott, M.W.; Berger, M.S.; Cha, S.

2014-01-01

254

MANTRACK. Controlled Document Tracking Software  

SciTech Connect

MANTRACK is an automated, controlled document tracking system which does the following and reduces staff time required to perform these tasks: generates transmittal letters/receipts for every controlled copy issued (merged from a current distribution list), tracks the return of transmittal receipts, facilitates the check-in of the large number of transmittal receipts returned (using a barcode reader), generates a reminder list which prompts the cyclic review and evaluation of existing documents, generates overdue reminders for the return of past-due transmittal receipts, tracks the number of Procedure Change Directives (PCD) currently in effect for each procedure, generates and maintains current distribution lists for each document, generates a current table of contents when updates to the document (usually a procedure manual) are made.

Gibson, R.E.; Haas, R. [Oak Ridge National Lab., TN (United States)

1992-06-01

255

AGATA - Advanced Gamma Tracking Array  

E-print Network

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 algorith...

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

2011-01-01

256

Aircraft recognition and tracking device  

NASA Astrophysics Data System (ADS)

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.

Filis, Dimitrios P.; Renios, Christos I.

2011-11-01

257

Magnetic Launch Assist Experimental Track  

NASA Technical Reports Server (NTRS)

In this photograph, a futuristic spacecraft model sits atop a carrier on the Magnetic Launch Assist System, formerly known as the Magnetic Levitation (MagLev) System, experimental track at the Marshall Space Flight Center (MSFC). Engineers at MSFC have developed and tested Magnetic Launch Assist technologies that would use magnetic fields to levitate and accelerate a vehicle along a track at very high speeds. Similar to high-speed trains and roller coasters that use high-strength magnets to lift and propel a vehicle a couple of inches above a guideway, a Magnetic Launch Assist system would electromagnetically drive a space vehicle along the track. A full-scale, operational track would be about 1.5-miles long and capable of accelerating a vehicle to 600 mph in 9.5 seconds. This track is an advanced linear induction motor. Induction motors are common in fans, power drills, and sewing machines. Instead of spinning in a circular motion to turn a shaft or gears, a linear induction motor produces thrust in a straight line. Mounted on concrete pedestals, the track is 100-feet long, about 2-feet wide, and about 1.5-feet high. The major advantages of launch assist for NASA launch vehicles is that it reduces the weight of the take-off, the landing gear, the wing size, and less propellant resulting in significant cost savings. The US Navy and the British MOD (Ministry of Defense) are planning to use magnetic launch assist for their next generation aircraft carriers as the aircraft launch system. The US Army is considering using this technology for launching target drones for anti-aircraft training.

1999-01-01

258

ATLAS FTK Fast Track Trigger  

E-print Network

The Fast TracKer (FTK) will perform global track reconstruction after each Level-1 trigger accept signal to enable the software-based higher level trigger to have early access to tracking information. FTK is a dedicated processor based on a mixture of advanced technologies. Modern, powerful Field Programmable Gate Arrays (FPGAs) form an important part of the system architecture, and the large level of computing power required for pattern recognition is provided by incorporating standard-cell ASICs named Associative Memory (AM). Motivation and the architecture of the FTK system will be presented, and the status of hardware and simulation will be following.

Iizawa, T; The ATLAS collaboration

2014-01-01

259

Practical issues in target tracking  

NASA Astrophysics Data System (ADS)

This dissertation is on three topics in target tracking: the effect of radar/sonar waveforms on tracking performance, a modified probabilistic data association filter (PDAF) based on a Bayes detector and sufficient conditions for the matrix Cramer-Rao lower bound (CRLB) scaling due to measurements of uncertain origin. In the first part (chapter 2), the effect of radar/sonar waveforms on tracking performance is investigated. The traditional approach for tracking system design is to treat the detection and tracking subsystems as independent units. However, the two subsystems can be designed jointly to obtain better tracking performance. Different waveforms, sidelobe-reduction techniques and measurement-extraction schemes are explored from the detection-tracking system point of view via the hybrid conditional averaging (HYCA) technique. The second part (chapter 3) is on a modified PDAF based on a Bayes detector. Existing detection systems generally operate using a fixed threshold, optimized to the Neyman-Pearson criterion. An alternative is Bayes detection, in which the threshold varies according to the ratio of prior probabilities. In a recursive target tracker such as the PDAF such priors are available in the form of a predicted location and associated covariance. A new PDAF with a Bayes detector is developed. The third part (chapter 4) deals with the matrix CRLB scaling due to measurements of uncertain origin. In many target tracking situations measurements are of uncertain origin. That is, at each scan a number of measurements are obtained, and it is not known which, if any, of these is target-originated. In several earlier papers the surprising observation was made that the CRLB for the estimation of a fixed parameter vector that characterizes the target motion, for the special case of measurements in the presence of additive white Gaussian noise, is simply a multiple of that for the case with no uncertainty. This is particularly useful as it allows comparison in terms of a scalar. This result is explored to determine how wide the class of such problems is. It includes many non-Gaussian situations.

Niu, Ruixin

260

Solid state nuclear track detection  

SciTech Connect

This book is a basic work on the technique variously known as 'nuclear track analysis', 'track-etch technique', or 'solid state nuclear tract detection'. This has greatly expanded in range, scope and depth since the early 1960's, soon after its discovery, until there is hardly a field now in which it has not found an actual or potential use. Such applications range from archaeology, geology, space physics, medicine and biology to reactor physics and nuclear physics-to name but a few.

Durrani, S.A.; Bull, R.K.

1987-01-01

261

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

ERIC Educational Resources Information Center

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

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

262

Fringe Tracking and Group Delay Tracking Methods for MIDI  

E-print Network

operating in support of the MIDI instrument. General characteristics of both estimators are compared will be included in the data reduction software package being developed for MIDI, the 10 micron interferometric instrument of the VLTI. Group-delay tracking is a technique which is somewhat more robust than true phase

Meisner, Jeff

263

Multiple Hypothesis Object Tracking For Unsupervised Self-Learning: An Ocean Eddy Tracking Application  

E-print Network

on tracking, and introduce the concept of multiple hypothesis assignment (MHA), which extends traditional tracking literature, MHA uses contextual spatio-temporal information to take corrective measures

Minnesota, University of

264

Central bank Financial Independence  

Microsoft Academic Search

Central bank independence is a multifaceted institutional design. The financial component has been seldom analysed. This paper intends to set a comprehensive conceptual background for central bank financial independence. Quite often central banks are modelled as robot like maximizers of some goal. This perspective neglects the fact that central bank functions are inevitably deployed on its balance sheet and have

J. Ramon Martinez-Resano

2004-01-01

265

North America Europe Central &  

E-print Network

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

Johnson, Matthew

266

Robotic vehicle with multiple tracked mobility platforms  

DOEpatents

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.

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

267

Quantification of line tracking solutions for automotive applications  

Microsoft Academic Search

Unlike line tracking in automotive painting applications, line tracking for automotive general assembly applications requires position tracking in order to perform assembly operations to a required assembly tolerance. Line tracking quantification experiments have been conducted for a total of 16 test cases for two line tracking scenarios with three types of line tracking solutions: encoder based tracking, encoder plus static

Jane Shi; Rick F. Rourke; Dave Groll; Peter W. Tavora

2008-01-01

268

Quantification of Line Tracking Solutions for Automotive Applications  

Microsoft Academic Search

Unlike line tracking in automotive painting applications, line tracking for automotive general assembly applications requires position tracking in order to perform assembly operations to a required assembly tolerance. Line tracking quantification experiments have been designed and conducted for a total of 16 test cases for two line tracking scenarios with three types of line tracking solutions: encoder based tracking, encoder

Jane Shi; Rick F. Rourke; Dave Groll; Peter W. Tavora

2009-01-01

269

6. VIEW TO SOUTHEAST ALONG CENTRAL BAY. NOTE TRUSSED SUPPORT ...  

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

6. VIEW TO SOUTHEAST ALONG CENTRAL BAY. NOTE TRUSSED SUPPORT FOR CRANEWAY TRACKS WITH OVERHEAD BRIDGE CRANES IN BACKGROUND. NOTE ALSO SWINGING BOOM CRANES ATTACHED TO COLUMNS. - Rosie the Riveter National Historical Park, Auxiliary Plate Shop, 912 Harbour Way, Richmond, Contra Costa County, CA

270

Applications of the tensor pomeron model to exclusive central diffractive meson production  

E-print Network

We discuss exclusive central diffractive production of scalar ($f_{0}(980)$, $f_{0}(1370)$, $f_{0}(1500)$), pseudoscalar ($\\eta$, $\\eta'(958)$), and vector ($\\rho^{0}$) mesons in proton-proton collisions. We show that high-energy central production of mesons could provide crucial information on the spin structure of the soft pomeron. The amplitudes are formulated in terms of effective vertices respecting standard rules of Quantum Field Theory and propagators for the exchanged pomeron and reggeons. For the scalar and pseudoscalar meson production, in most cases, two lowest orbital angular momentum - spin couplings are necessary to describe WA102 experimental differential distributions. Different pomeron-pomeron-meson tensorial (vectorial) coupling structures are possible in general. For the $\\rho^{0}$ production the photon-tensor pomeron/reggeon exchanges are considered and the coupling parameters are fixed from the H1 and ZEUS experimental data of the $\\gamma p \\to \\rho^{0} p$ reaction. We present first predictions of this mechanism for the $pp \\to pp (\\rho^{0} \\to \\pi^{+} \\pi^{-})$ reaction being studied at COMPASS, RHIC, Tevatron, and LHC. We analyse influence of the experimental cuts on integrated cross section and various differential distributions for produced mesons.

Piotr Lebiedowicz; Otto Nachtmann; Antoni Szczurek

2014-07-14

271

Referent Tracking for Corporate Memories  

Microsoft Academic Search

Corporate memories (CM) are information systems designed to keep track of the history and evolution of an enterprise with the goal of using past experience to enhance performance in the future. Well designed CMs should contain data about both the enterprise and the environment in which it operates. The former, traditionally embodied in what is referred to as an 'enterprise

Werner CEUSTERS; Barry SMITH

272

Program Tracks Cost Of Travel  

NASA Technical Reports Server (NTRS)

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.

Mauldin, Lemuel E., III

1993-01-01

273

RFID for personal asset tracking  

Microsoft Academic Search

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

S. Chan; A. Connell; R. Kamoua

2009-01-01

274

Tracking Radioactive Sources in Commerce  

E-print Network

Area Network­mobile phone, ethernet and/or satellite ? security--encryption, short broadcast bursts of specific packages © Missing sealed radioactive sources pose a significant environmental and health risk of radioactive consumer products ? Use in terrorist activities Effective package tracking system can prevent loss

275

Robust tracking of maneuvering targets  

Microsoft Academic Search

The problem of real-time estimation of the state of maneuvering objects is a complex task due to the uncertainty associated with the timing and nature of the possible maneuvers. Most approaches in the tracking literature use stochastic process models to represent the unknown maneuvers. The simplest of these approaches involves modeling unknown object accelerations as white noise processes and using

Waheed Ahmad Younis

1999-01-01

276

Multiple Kernel Tracking with SSD  

Microsoft Academic Search

Kernel-based objective functions optimized using the mean shift algorithm have been demonstrated as an effective means of tracking in video sequences. The resulting algo- rithms combine the robustness and invariance properties af- forded by traditional density-based measures of image sim- ilarity, while connecting these techniques to continuous op- timization algorithms. This paper demonstrates a connection between kernel- based algorithms and

Gregory D. Hager; Maneesh Dewan; Charles V. Stewart

2004-01-01

277

Spec Towns Track Family & Graduate  

E-print Network

Street Cemetery Woodruff Field Spec Towns Track Foley Baseball Field Family & Graduate Housing University Housing Office Intramural Fields Lake Herrick Pavilion Family & Graduate Housing University Village Stadium FIELD ST SAN FO RDDR Physics Chemistry CCQC Biological Sciences Myers Mary Lyndon Rutherford

Arnold, Jonathan

278

Spec Towns Track Family & Graduate  

E-print Network

Street Cemetery Woodruff Field Spec Towns Track Foley Baseball Field Family & Graduate Housing University Housing Office Intramural Fields Lake Herrick Pavilion Family & Graduate Housing University Village Ramsey Center East Village Deck Printing RIVER RD Poultry Science Food Science Sanford Stadium FIELD ST

Arnold, Jonathan

279

Human Tracking Using Electric Fields  

Microsoft Academic Search

In this paper we describe a simple, cheap, and unobtrusive demo system that can track multiple persons with low-frequency electric fields. The system's operation is based on measuring the capacitance between multiple floor tiles and a receiving electrode. The presented system is invisible to the user and uses a single-chip solution to measure the capacitances. The system was provided for

Miika Valtonen; Jukka Vanhala

2009-01-01

280

Spec Towns Track Family & Graduate  

E-print Network

Jackson Street Cemetery Woodruff Field Spec Towns Track Foley Baseball Field Family & Graduate Road Family & Graduate Housing Office Intramural Fields Lake Herrick Pavilion Family & Graduate Housing Science Sanford Stadium FIELD ST SAN FO RDDR Physics Chemistry CCQC Biological Sciences Myers Mary Lyndon

Arnold, Jonathan

281

Spec Towns Track Family & Graduate  

E-print Network

Street Cemetery Woodruff Field Spec Towns Track Foley Baseball Field Family & Graduate Housing University Housing Office Intramural Fields Lake Herrick Pavilion Family & Graduate Housing University Village Stadium FIELD ST SAN FO RD DR Physics Chemistry CCQC Biological Sciences Myers Mary Lyndon Rutherford

Arnold, Jonathan

282

Tracking Uncertainty with Probabilistic Logic  

E-print Network

is often that of subatomic particles. For instance, quantum bits exist in superpo- sition states to soft faults caused by external radiation. When primary radiation particles enter the atmosphere, neutrons and other secondary particles can strike a critical circuit node, leaving behind an ionized track

Markov, Igor

283

Quadrotor Helicopter Trajectory Tracking Control  

Microsoft Academic Search

The Stanford Testbed of Autonomous Rotorcraft for Multi-Agent Control (STARMAC), a eet of quadrotor helicopters, has been developed as a testbed for novel algorithms that enable autonomous operation of aerial vehicles. This paper develops an autonomous vehicle trajectory tracking algorithm through cluttered environments for the STARMAC platform. A system relying on a single optimization must trade o the complexity of

Gabriel M. Homann; Steven L. Waslander; Claire J. Tomlin

284

Emergency Brake for Tracked Vehicles  

NASA Technical Reports Server (NTRS)

Caliper brake automatically stops tracked vehicle as vehicle nears end of travel. Bar on vehicle, traveling to right, dislodges block between brake pads. Pads then press against bar, slowing vehicle by friction. Emergencybraking system suitable for elevators, amusement rides and machine tools.

Green, G. L.; Hooper, S. L.

1986-01-01

285

NLP Track at TREC-5.  

National Technical Information Service (NTIS)

The Natural Language Processing (NLP) track was organized for the first time at TREC-5 to provide a more focused look at how NLP techniques can improve performance in information retrieval (IR). The intent was to see if the NLP techniques available today ...

K. S. Jones, T. Strzalkowski

1996-01-01

286

The track imaging Cerenkov experiment  

NASA Astrophysics Data System (ADS)

The Track Imaging Cerenkov Experiment (TrICE) aims for a ground-based measurement of high energy cosmic-ray composition using a novel technique. By separating the Cerenkov emission from the primary and secondary particles, nearly elemental charge resolution can be established. Here the status of the TrICE experiment is discussed.

Wissel, S. A.; Hays, E.; Tr Ice Collaboration

2007-03-01

287

Object tracking in infrared imagery  

Microsoft Academic Search

In this paper, we propose a robust approach for object tracking in infrared imagery. Our method mainly applies the image intensity histogram distribution and intensity projection distributions and computes a likelihood measure between the candidate and the model distributions by evaluating the Mean Shift Vector. In addition, Gabor filters are applied here to enhance the contrast of the object with

Hui Chen; Ming Tang; Hanqing Lu

2003-01-01

288

Infrared-based object tracking  

Microsoft Academic Search

Often it is necessary to track moving objects on horizontal paths. Human error and the associated cost and dangers of using humans lead to a requirement to automate this task. The system presented here was designed, built and tested. The system uses an IR beacon and a microcontroller receiver\\/controller module. The design consists of a field programmable gate array (FPGA)

Jon Gervais; Austin Youngblood; Walter H. Delashmit

2009-01-01

289

Haptic Tracking Permits Bimanual Independence  

ERIC Educational Resources Information Center

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

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

2006-01-01

290

AGATA - Advanced Gamma Tracking Array  

E-print Network

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.

S. Akkoyun; A. Algora; B. Alikhani; F. Ameil; G. de Angelis; L. Arnold; A. Astier; A. Ata; 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. Brger; S. Cabaret; B. Cahan; E. Calore; F. Camera; A. Capsoni; F. Carri; G. Casati; M. Castoldi; B. Cederwall; J. -L. Cercus; V. Chambert; M. El Chambit; R. Chapman; L. Charles; J. Chavas; E. Clment; 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. Dsesquelles; P. Detistov; C. Diarra; F. Didierjean; M. R. Dimmock; Q. T. Doan; C. Domingo-Pardo; M. Doncel; F. Dorangeville; N. Dosme; Y. Drouen; G. Duchne; B. Dulny; J. Eberth; P. Edelbruck; J. Egea; T. Engert; M. N. Erduran; S. Ertrk; 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. Gernhuser; A. Giannatiempo; A. Giaz; L. Gibelin; A. Givechev; N. Goel; V. Gonzlez; A. Gottardo; X. Grave; J. Gr?bosz; R. Griffiths; A. N. Grint; P. Gros; L. Guevara; M. Gulmini; A. Grgen; H. T. M. Ha; T. Habermann; L. J. Harkness; H. Harroch; K. Hauschild; C. He; A. Hernndez-Prieto; B. Hervieu; H. Hess; T. Hyk; 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. Krll; R. Krcken; 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. Lotod; S. Lunardi; A. Maj; J. van der Marel; Y. Mariette; N. Marginean; R. Marginean; G. Maron; A. R. Mather; W. M?czy?ski; V. Mendz; 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. Mller; 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. zben; 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. Pugnre; 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. Ross; 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. Stzowski; J. Strachan; G. Suliman; P. -A. Sderstrm; 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-Lano; 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

2011-11-24

291

Deer Tracks in the City?  

NSDL National Science Digital Library

"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

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

2009-10-01

292

Math on the Fast Track  

ERIC Educational Resources Information Center

In this article, the author relates how a math-assessment software has allowed his school to track the academic progress of its students. The author relates that in the first year that the software was deployed, schoolwide averages in terms of national standing on the math ITBS rose from the 42nd to 59th percentile. In addition, a significant

Howe, Quincy

2006-01-01

293

Space Object Tracking (SPOT) facility  

NASA Astrophysics Data System (ADS)

Lockheed Martin has built a Space Object Tracking (SPOT) facility at our Santa Cruz test site in Northern California. SPOT consists of three 1 meter optical telescopes controlled by a common site management system to individually or cooperatively task each system to observe orbital debris and earth orbiting satellites. The telescopes are mounted in Az/El fork mounts capable of rapid repointing and arc-sec class open loop tracking. Each telescope is installed in a separate clam shell dome and has aft mounted benches to facilitate installing various instrument suites. The telescope domes are mounted on movable rail carts that can be positioned arbitrarily along tracks to provide variable baselines for sparse aperture imaging. The individual telescopes achieved first light in June 2012 and have been used since to observe satellites and orbital debris. Typical observations consist of direct photometric imaging at visible and near infrared wavelengths, and also include spectroscopic and hypertemporal measurements. Rayleigh beacon adaptive optical systems for atmospheric aberration correction and high rate J-Band trackers for each telescope will be added in 2015. Coherent combinations of the three telescopes as an interferometric imaging array using actively stabilized free space variable delay optical paths and fringe tracking sensors is also planned. The first narrow band (I band) interferometric fringes will be formed in the summer of 2014, with wide band (R, I, H) interferometric imaging occurring by early 2015.

Shivitz, Robert; Kendrick, Richard; Mason, James; Bold, Matthew; Kubo, Tracy; Bock, Kevin; Tyler, David

2014-07-01

294

Tracking Loose-Limbed People  

Microsoft Academic Search

We pose the problem of 3D human tracking as one of in- ference in a graphical model. Unlike traditional kinematic tree representations, our model of the body is a collection of loosely-connected limbs. Conditional probabilities relating the 3D pose of connected limbs are learned from motion- captured training data. Similarly, we learn probabilistic models for the temporal evolution of each

Leonid Sigal; Sidharth Bhatia; Stefan Roth; Michael J. Black; Michael Isard

2004-01-01

295

GPS: location-tracking technology  

Microsoft Academic Search

Increasing commercial use of the Global Positioning System will soon make it possible to locate anything, anywhere, anytime. The Global Positioning System can provide extremely accurate location information for mobile objects and people which is far superior to earlier tracking techniques. The challenge today is integrating the necessary components into older systems and improving GPS accuracy in areas with numerous

R. Bajaj; S. L. Ranaweera; D. P. Agrawal

2002-01-01

296

On the TREC Blog Track  

Microsoft Academic Search

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

Iadh Ounis; Ian Soboroff

2008-01-01

297

A distributed topological camera network representation for tracking applications.  

PubMed

Sensor networks have been widely used for surveillance, monitoring, and tracking. Camera networks, in particular, provide a large amount of information that has traditionally been processed in a centralized manner employing a priori knowledge of camera location and of the physical layout of the environment. Unfortunately, these conventional requirements are far too demanding for ad-hoc distributed networks. In this article, we present a simplicial representation of a camera network called the camera network complex ( CN-complex), that accurately captures topological information about the visual coverage of the network. This representation provides a coordinate-free calibration of the sensor network and demands no localization of the cameras or objects in the environment. A distributed, robust algorithm, validated via two experimental setups, is presented for the construction of the representation using only binary detection information. We demonstrate the utility of this representation in capturing holes in the coverage, performing tracking of agents, and identifying homotopic paths. PMID:20529737

Lobaton, Edgar; Vasudevan, Ramanarayan; Bajcsy, Ruzena; Sastry, Shankar

2010-10-01

298

Back on Track  

NASA Astrophysics Data System (ADS)

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

2007-06-01

299

Opportunity Tracks Seen from Orbit  

NASA Technical Reports Server (NTRS)

[figure removed for brevity, see original site] Figure 1

NASA's Mars Exploration Rover Opportunity landed on the red planet a year ago. This enhanced-resolution image from the Mars Orbiter Camera on NASA's Mars Global Surveyor orbiter is the only picture obtained thus far (by Jan. 24, 2005) that shows the tracks made by Opportunity.

The image was acquired on April 26, 2004, during Opportunity's 91st martian day, or sol. That was the first day of Opportunity's extended mission, and the rover had recently completed exploration of small 'Fram Crater' on the route from its landing site toward 'Endurance Crater,' where it would eventually spend six months. The rover itself can be seen in this image -- an amazing accomplishment, considering that the orbiter was nearly 400 kilometers (nearly 250 miles) away at the time! Also visible and labeled on this image are the spacecraft's lander, backshell, parachute and heat shield, plus effects of its landing rockets.

The camera captured this image with use of a technique called compensated pitch and roll targeted observation. In this method, the entire spacecraft rolls as it passes over the target area so the camera can scan in a way that sees details at three times higher resolution than the camera's normal high-resolution capability.

The tracks made by Opportunity on the sandy surface of Meridiani Planum are not quite as visible from orbit as are the tracks made in Gusev Crater by the other Mars Exploration Rover, Spirit. A dustier surface at the Spirit site increases contrast between the tracks and the surrounding surfaces. Indeed, some parts of the track made by Opportunity are not visible in this image. Sunlight illuminates the scene from the left. North is toward the top of the image. The 100-meter scale bar is 109 yards long.

2005-01-01

300

Odor identity influences tracking of temporally patterned plumes in Drosophila  

E-print Network

tethered in a magnetic field actively track continuous (non-that field potential recordings faithfully track temporalfield potential responses to an intermittent plume, found that receptor dynamics track

Krishnan, Parthasarathy; Duistermars, Brian J; Frye, Mark A

2011-01-01

301

Tracking dynamic regions of texture and shape  

E-print Network

The tracking of visual phenomena is a problem of fundamental importance in computer vision. Tracks are used in many contexts, including object recognition, classification, camera calibration, and scene understanding. ...

Migdal, Joshua N. (Joshua Nicholas), 1979-

2007-01-01

302

Childhood Cancer Tracking Initiative in Massachusetts  

E-print Network

Childhood Cancer Tracking Initiative in Massachusetts: Developing a New Electronic Tool Presented (CEH) Massachusetts Department of Public Health (MDPH) #12;Childhood Cancer Tracking Initiative "Develop methods for linking environmental databases with childhood cancer incidence data to identify

303

Fast track reservoir characterisation of a subtle Palaeocene deep marine turbidite field using a rock physics and seismic modelling led workflow  

Microsoft Academic Search

This paper presents a novel approach to identifying\\/tracking interlocking Palaeocene sand and shale filled channels (based on forward modelling, AVO classification, inversion of inversion techniques for an appraised subtle Palaeocene deep marine turbidite, Central North Sea.

H. J. S. Morris; R. Christensen; D. Gawith; M. Millwood-Hargrave

304

Home | About UPS | Contact UPS | Welcome Center Track by Tracking  

E-print Network

or Billed on: Apr 5, 2004 Tracking Number: 1Z F3A 606 22 1002 866 4 Service Type: EXPRESS Weight: 1.00 Lb:15 A.M. ISTANBUL, TR DEPARTURE SCAN 8:07 A.M. ISTANBUL, TR ARRIVAL SCAN 4:15 A.M. KOELN (COLOGNE), DE DEPARTURE SCAN Apr 7, 2004 1:41 P.M. TEL AVIV, IL NEVER ARRIVED AT DESTINATION;UPS INTERNAL ACTIVITY CODE 6

Bartholdi III, John J.

305

Analysis of Tropical Cyclone Tracks in the North Indian Ocean  

NASA Astrophysics Data System (ADS)

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.

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

2011-12-01

306

An evaluation of structured snow-track surveys to monitor Eurasian lynx Lynx lynx populations  

Microsoft Academic Search

Counts of tracks that passively accumulate on a suitable substrate are commonly used to derive indices of large carnivore abundance. In this study we evaluate the suitability of a similar survey using multiple 3-km long transect-lines to detect changes in population size for Eurasian lynx Lynx lynx in central Norway. We used GIS methods to simulate the crossing of transect

John D. C. Linnell; Peder Fiske; John Odden; Henrik Brseth; Ivar Herfindal; Reidar Andersen

2007-01-01

307

Leadership Lessons from the Fast Track Programme for Teachers in England  

ERIC Educational Resources Information Center

The Fast Track Teaching (FTT) programme in England, developed and funded by central government, is an accelerated leadership development programme designed for teachers in the early years of their careers. It was intended to promote their retention and rapid promotion in the profession through advancing their leadership skills. It provides a

Jones, Jeffrey

2010-01-01

308

EUROTeV-Report-2005-026-1 Particle tracking in the ILC extraction lines with  

E-print Network

their trajectories using the second order matrix formalism [7]. The present version of the code makes sureEUROTeV-Report-2005-026-1 Particle tracking in the ILC extraction lines with DIMAD and BDSIM R is of central importance to the design and perfor- mance assessment of modern particle accelerators

309

Serial linkage of target selection for orienting and tracking eye movements  

Microsoft Academic Search

Many natural actions require the coordination of two different kinds of movements. How are targets chosen under these circumstances: do central commands instruct different movement systems in parallel, or does the execution of one movement activate a serial chain that automatically chooses targets for the other movement? We examined a natural eye tracking action that consists of orienting saccades and

Stephen G. Lisberger; Justin L. Gardner

2002-01-01

310

Error-tracking clustering gives quantitative statistics to DNA segmentation analysis  

E-print Network

Error-tracking clustering gives quantitative statistics to DNA segmentation analysis Chih-Hao Chen1, Taiwan 30043 3Department of Surgery, Cathay General Hospital, Taipei, Taiwan 4Cathay Medical Research Institute, Cathay General Hospital, Taipei, Taiwan 5Graduate Institute of Statistics, National Central

Lee, H.C. Paul

311

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

312

Application of ground-penetrating radar to railway track substructure maintenance management  

NASA Astrophysics Data System (ADS)

Railway track substructure maintenance management is the process of utilizing railroad resources to maintain and upgrade the track substructure. The process begins with a measure of the track condition to evaluate the substructure performance, determine locations along the track that require maintenance, and identify appropriate solutions. Ground penetrating radar (GPR) has been proposed as a potentially valuable tool for this purpose. The objective of the research was to develop GPR testing and data interpretation techniques suitable for use by railroad personnel in this application. The principle of GPR operation is the transmission of short electromagnetic waves into the subsurface and recording the resulting signal of the reflected waves. Electromagnetic waves are influenced most significantly by the dielectric constant of the soil. The dielectric constant is most affected by moisture content making GPR a valuable tool for locating trapped water that will cause increased track deterioration rates. GPR has the potential to evaluate the thicknesses and properties of the substructure layers on a continuous, non-destructive basis to improve the process of diagnosing substructure causes of track performance deterioration. GPR railroad research at UMass started with the construction of a test track. Different track structure components were tested to determine their effects on the GPR data. Approximately 200 tests were conducted. Subsequently, about 275 miles of data were collected on several U.S. railroads including Amtrak, Conrail, New England Central, and Burlington Northern Santa Fe, and in England on AMEC Rail. The data were studied to determine how well GPR can define substructure conditions, identify track problem areas, and provide an indication of the cause of the problem. The analysis included comparison of the GPR data to track geometry, subsurface stratigraphy, and ballast condition (fouling and moisture). GPR processing techniques were developed to simplify interpretation of the data. The results showed that GPR could locate zones of increased substructure degradation at over 75% of the sites.

Sussmann, Theodore Reinhold, Jr.

313

Tracking Dynamic Fronts using Sensor Network  

Microsoft Academic Search

We examine the problem of tracking dynamic boundaries occurring in natural phenomena using a network of range sensors. Two main challenges of the boundary tracking problem are accurate boundary estimation from noisy obser- vations and continuous tracking of the boundary. We propose Dynamic Boundary Tacking (DBTR), an algorithm that com- bines the spatial estimation and temporal estimation techniques to effectively

Subhasri Duttagupta; Krithi Ramamritham; Purushottam Kulkarni

314

Advances in Eye Tracking in Infancy Research  

ERIC Educational Resources Information Center

In 2004, McMurray and Aslin edited for "Infancy" a special section on eye tracking. The articles in that special issue revealed the enormous promise of automatic eye tracking with young infants and demonstrated that eye-tracking procedures can provide significant insight into the emergence of cognitive, social, and emotional processing in infancy.

Oakes, Lisa M.

2012-01-01

315

Object tracking using multiple motion modalities  

Microsoft Academic Search

This paper presents an object tracking system that utilises a hybrid multi-layer motion segmentation and optical flow algorithm. While many tracking systems seek to combine multiple modalities such as motion and depth or multiple inputs within a fusion system to improve tracking robustness, current systems have avoided the combination of motion and optical flow. This combination allows the use of

Simon Denman; Clinton Fookes; Sridha Sridharan; Vinod Chandran

2008-01-01

316

Canonical particle tracking in undulator fields  

Microsoft Academic Search

An algebraic mapping routine for particle tracking across wiggler and undulator fields is presented. It is based on a power series expansion of the generating function to guarantee fully canonical transformations. This method is 10 to 100 times faster than integration routines, applied in tracking codes like BETA or RACETRACK. The tracking method presented is not restricted to wigglers and

G. Wstefeld; J. Bahrdt

1991-01-01

317

AMSTE precision fire control tracking overview  

Microsoft Academic Search

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

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

2000-01-01

318

ISRO telemetry, tracking and command network (ISTRA)  

Microsoft Academic Search

The ISRO telemetry, tracking, and command network supports satellite and launch vehicle missions of ISRO. For ISRO satellite missions, it is used for tracking, command, and housekeeping data acquisition throughout mission life. For ISRO launch vehicle missions such as ASLV and PSLV, it provides telemetry data acquisition support from lift-off to satellite injection, as well as down range tracking support

N. Pant

1986-01-01

319

Multiple model adaptive tracking of airborne targets  

Microsoft Academic Search

Over the past ten years considerable work has been accomplished at the Air Force Institute of Technology (AFIT) towards improving the ability of tracking airborne targets. Motivated by the performance advantages in using established models of tracking environment variables within a Kalman filter, an advanced tracking algorithm has been developed based on adaptive estimation filter structures. A multiple model bank

John E. Norton

1988-01-01

320

Tracking speckle patterns with optical correlation  

Microsoft Academic Search

It has been shown that tracking small particle motion can be accomplished by tracking the speckle pattern is produces. This paper describes various methods of real-time tracking of speckle patterns obtained from ultrasonic flow imaging of blood and tissue motion using optical correlation. Results obtained from a gray scale joint transform correlator utilizing a twisted nematic liquid crystal spatial light

Natalie Clark; Michael K. Giles; Sarah H. Harrison; Chris P. Hofer

1993-01-01

321

Robot tracking using vision and laser sensors  

Microsoft Academic Search

We present a real-time person tracking system for a mobile robot using the information from a PTZ video camera and a laser range finder. For robust tracking, the target person model is constructed. The model includes the color, edge and size information of the tracked person. People moving in the field of view are detected by the robot via the

Wen Dai; Aysegul Cuhadar; Peter X. Liu

2008-01-01

322

Track Picture Book. Elementary Science Study.  

ERIC Educational Resources Information Center

This picture book was designed to be used with an Elementary Science Study unit that provides opportunities for students in grades 4-6 to study animal tracks. Shown within this book are numerous examples of tracks, including those of tires, human beings, animal tracks, and others in various media, such as snow, sand, mud, dust, and cement. (CS)

Webster, David; And Others

323

Track and Trace Case Studies Report  

Microsoft Academic Search

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

Thomas Kelepouris; Tom Baynham; Duncan McFarlane

2006-01-01

324

Teaching Braille Line Tracking Using Stimulus Fading  

ERIC Educational Resources Information Center

Line tracking is a prerequisite skill for braille literacy that involves moving one's finger horizontally across a line of braille text and identifying when a line ends so the reader may reset his or her finger on the subsequent line. Current procedures for teaching line tracking are incomplete, because they focus on tracking lines with only

Scheithauer, Mindy C.; Tiger, Jeffrey H.

2014-01-01

325

Dynamic active contours for visual tracking  

Microsoft Academic Search

Visual tracking using active contours is usually set in a static framework. The active contour tracks the object of interest in a given frame of an image sequence. A subsequent prediction step ensures good initial placement for the next frame. This approach is unnatural; the curve evolution gets decoupled from the actual dynamics of the objects to be tracked. True

Marc Niethammer; Allen Tannenbaum; Sigurd Angenent

2006-01-01

326

Preprocessing communication unit (PCU) with short message service (SMS) communication channels for AVL tracking  

NASA Astrophysics Data System (ADS)

The Preprocessing GPS - SMS Communication Unit (PCU) is a mobile tracking device used within AVL tracking systems for determining the location of vehicles. It was designed primarily to utilize the SMS service of the GSM network for communicating. The use of SMS messages is part of an effort aimed at providing a cost effective alternative for tracking the location of vehicles. Its primary function is to send information about user location across a GSM network to a Central Base Station (CBS) from which assets are being tracked. Though SMS is the main bearer, the unit is also capable of using Circuit Switch Data Service (CSD) to send and receive data from the Base Station (BS). The PCU was developed as a small hardware unit based on the Microchip microcontroller, with a multiplexer switching two RS 232 serial inputs. One input is dedicated to the GPS receiver and the second one to the wireless modem.

Young, Andrew S.; Skobla, Joseph

2003-08-01

327

CENTRAL PLACE FORAGING AND PREY PREPARATION BY A SPECIALIST PREDATOR, THE MERLIN  

Microsoft Academic Search

By discarding inedible body parts of prey at greater distances from a central place, a central place forager can reduce the cost of prey transport and thus increase net rate of energy delivery. This hypothesis was tested in a specialist predator, the Merlin (Falco columbarius). Fifteen male Merlins were radio-tracked in Saskatoon (Canada) for this study. Merlins were more likely

NAY JOT S. SODHI; FALCO COLUMBARIUS

328

Integration of Wireless Gesture Tracking, Object Tracking, and 3D Reconstruction in the Perceptive  

E-print Network

Integration of Wireless Gesture Tracking, Object Tracking, and 3D Reconstruction in the Perceptive input devices and teth- ered tracking. Objects are recognized and tracked when placed on the display surface. By using multiple infrared light sources, the object's 3D shape can be captured and inserted

Starner, Thad E.

329

Hollow fission fragment tracks in fluorapatite  

NASA Astrophysics Data System (ADS)

Spontaneous fission of uranium in minerals creates a damaged "track" along the trajectory of the fission fragments. Fission tracks in fluorapatite, enlarged by chemical etching, are widely used in geologic age-dating and the reconstruction of the thermal history of Earth's crust. However, despite this wide spread application, there have been no systematic studies of the internal structure of unetched fission tracks or the atomic-scale process of track annealing. In this research, fission tracks in fluorapatite are demonstrated to be nano-channels instead of amorphous cores as had been assumed. The formation of hollow tracks is ascribed to the highly ionizing energy deposition of fission fragments inducing radiolytic decomposition of fluorapatite accompanied by the loss of volatile elements. The mechanism for thermal annealing of hollow tracks in fluorapatite is shown to be entirely different from that of amorphous tracks in zircon. The discontinuity of fission tracks, in addition to the shrinkage, prevents chemicals from entering into the hollow tracks for further etching, and then significantly reduces the etched length. The shrinkage of hollow fission tracks results from thermo-emission of vacancies or gaseous species from the cavities to surrounding solids instead of atomic-scale recovery of the amorphous core. The high diffusivity of atoms on the surface of hollow tracks causes the discontinuity of tracks either by Rayleigh instability, by Brownian motion, or by preferential motion of track segments. The preferential motion of atoms along c-axis causes more rapid annealing of fission tracks perpendicular to the c-axis. Under the electron beam, the hollow tracks segment into droplets and the track segments randomly move at room temperature or preferentially move along c-axis at high temperatures. The radiolytic annealing results from beam-enhanced diffusion, which is similar to thermally enhanced diffusion. The similarity in the morphology of fission tracks and electron beam-induced bubbles and their preferential elongation along c-axis at high temperatures further confirm that the tracks are actually hollow channels. The radius profile of fission track along its trajectory has been calculated. These data will be critical to developing an atomic-scale model of track fading as it applied to geologic age-dating.

Li, Weixing

330

[Tracking axis of the body tracking test(BTT)].  

PubMed

We report herein on the use of the body tracking test (BTT), which is a method for quantitatively evaluating dynamic body balancing function, and how the body center moves during tracking by healthy subjects. We investigated 779 healthy subjects with no history of vertigo or balance disorder and a mean age of 37.9 years. Breakdown is as follows. Under 10 years old is 81 (37 boy and 44 girl), 10 years of age is 162 (73 boy and 89 girl), 20 years of age is 110 (43 men and 67 women), 30 years of age is 73 (44 male, 29 female), 40 years of age is 79 (49 men and 30 women), 50 years of age is 77 (40 men and 37 women), 60 years of age is 100 (53 men and 47 women), 70 years of age is 73 (27 men and 46 women), 80 years of age is 24 (15 men and 9 women). For the visual stimulus, we used a constant-speed antero-posterior (A-P) stimulus BTT and a constant-speed lateral BTT. BTT analysis involved principal axis analysis, in which the principal axis was the first principal component according to a principal component analysis technique. The axis tilt in the principal axis direction was assessed by calculating the coordinate Y-axis and X-axis tilt. In the anteroposterior (A-P) BTT, subjects of all ages exhibited an angle of tilt in the clockwise direction (the "plus" direction), together with the position vector and velocity vector. In the lateral BTT, we observed that the subjects tracked with a tilt in the counter-clockwise direction (the "minus" direction), together with the position vector and velocity vector. In terms of the subjects' ages, the angle of tilt from 0 degree in the antero-posterior (A-P) BTT showed the clockwise direction (the "plus" direction). In the lateral BTT, subjects 10 to 30 years of age exhibited tracking along the X-axis, with no observable tilt. Movement of the center of gravity may be a major acquired ability (practice) with respect to the direction of tilt of the tracking axis. Spatial sensory ability primarily involves the right parietal lobe of the brain, and somatosensory information from the left side of the body is believed to be used more for the positional relationships between the legs and the torso. Deviation of the principal axis appears to be related to the relationship between the dominant foot and the pivot foot, as well as to the functions of the parietal lobe that are involved in spatial sensing. PMID:24558946

Yoshida, Tomoe; Ikemiyagi, Fuyuko; Ikemiyagi, Yoshihiro; Tanaka, Toshitake; Takanami, Taro; Tamura, Yuya; Yamamoto, Masahiko; Suzuki, Mitsuya

2013-12-01

331

Doppler tracking experiment MA-089  

NASA Technical Reports Server (NTRS)

The Doppler tracking experiment was designed to test the feasibility of improved mapping of earth gravity field anomalies by means of the low-low satellite-to-satellite tracking method. All prescribed data have been retrieved and are currently being reduced and analyzed. Baseline data taken while the docking module was still attached to the command and service module indicated that the equipment operated satisfactorily. The efficacy of the two frequency ionospheric correction method has been demonstrated, and preliminary reduction of a data sample has successfully removed extraneous signatures down to the 50-millihertz level, where the rotational motion of the docking module is revealed. Photographs of the docking module, taken shortly after jettison, show that its rotation was stable.

Weiffenbach, G. C.; Grossi, M. D.

1976-01-01

332

Fast tracking using edge histograms  

NASA Astrophysics Data System (ADS)

This paper proposes a new algorithm for tracking objects and objects boundaries. This algorithm was developed and applied in a system used for compositing computer generated images and real world video sequences, but can be applied in general in all tracking systems where accuracy and high processing speed are required. The algorithm is based on analysis of histograms obtained by summing along chosen axles pixels of edge segmented images. Edge segmentation is done by spatial convolution using gradient operator. The advantage of such an approach is that it can be performed in real-time using available on the market hardware convolution filters. After edge extraction and histograms computation, respective positions of maximums in edge intensity histograms, in current and previous frame, are compared and matched. Obtained this way information about displacement of histograms maximums, can be directly converted into information about changes of target boundaries positions along chosen axles.

Rokita, Przemyslaw

1997-04-01

333

Network exploitation using WAMI tracks  

NASA Astrophysics Data System (ADS)

Creating and exploiting network models from wide area motion imagery (WAMI) is an important task for intelligence analysis. Tracks of entities observed moving in the WAMI sensor data are extracted, then large numbers of tracks are studied over long time intervals to determine specific locations that are visited (e.g., buildings in an urban environment), what locations are related to other locations, and the function of each location. This paper describes several parts of the network detection/exploitation problem, and summarizes a solution technique for each: (a) Detecting nodes; (b) Detecting links between known nodes; (c) Node attributes to characterize a node; (d) Link attributes to characterize each link; (e) Link structure inferred from node attributes and vice versa; and (f) Decomposing a detected network into smaller networks. Experimental results are presented for each solution technique, and those are used to discuss issues for each problem part and its solution technique.

Rimey, Ray; Record, Jim; Keefe, Dan; Kennedy, Levi; Cramer, Chris

2011-06-01

334

Acoustic tracking of migrating salmon.  

PubMed

Annual salmon migrations vary significantly in annual return numbers from year to year. In order to determine when a species' sustainable return size has been met, a method for counting and sizing the spawning animals is required. This project implements a probability hypothesis density tracker on data from a dual frequency identification sonar to automate the process of counting and sizing the fish crossing an insonified area. Data processing on the sonar data creates intensity images from which possible fish locations can be extracted using image processing. These locations become the input to the tracker. The probability hypothesis density tracker then solves the multiple target tracking problem and creates fish tracks from which length information is calculated using image segmentation. The algorithm is tested on data from the 2010 salmon run on the Kenai river in Alaska and compares favorably with statistical models from sub-sampling and manual measurements. PMID:25324076

Kupilik, Matthew J; Petersen, Todd

2014-10-01

335

On-Track Unit Conversion  

NSDL National Science Digital Library

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.

AMPS GK-12 Program,

336

Tracking Electromagnetic Energy With SQUIDs  

NASA Technical Reports Server (NTRS)

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.

2005-01-01

337

Emission characteristics of VOCs from athletic tracks.  

PubMed

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

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

1999-12-23

338

Global optimization for track finding  

NASA Astrophysics Data System (ADS)

Hopfield networks with mean-field annealing have been proposed for track finding in particle detectors by Peterson and Denby. In this paper we investigate and compare some other-probabilistic and heuristic-approaches to finding the global minimum of the associated energy function: Simulated annealing, threshold accepting, great deluge, record-to-record travel, and tabu search. We also use a branch-and-bound and a branch-and-cut algorithm in order to obtain the exact global minimum.

Diehl, M.; Jnger, M.; Frhwirth, R.; Scherzer, J.

1997-02-01

339

Infrared tag and track technique  

DOEpatents

A method of covertly tagging an object for later tracking includes providing a material capable of at least one of being applied to the object and being included in the object, which material includes deuterium; and performing at least one of applying the material to the object and including the material in the object in a manner in which in the appearance of the object is not changed, to the naked eye.

Partin, Judy K. (Idaho Falls, ID); Stone, Mark L. (Idaho Falls, ID); Slater, John (Albuquerque, NM); Davidson, James R. (Idaho Falls, ID)

2007-12-04

340

Tracking the West Nile Virus  

NSDL National Science Digital Library

How can viral sequences help us establish the origin of the virus that appeared in the US in 1999? Epidemiologists have adopted bioinformatics approaches using sequence data from strains of pathogens to track the movement of bacteria and viruses from continent to continent. * explore a data set of West Nile Virus sequences from all over the world that date from the mid-20th century to the present

Erica Suchmann (University of California - San Diego;Biology); Mark Gallo (Niagara University;Biology)

2006-05-20

341

Single nanoparticle tracking spectroscopic microscope  

DOEpatents

A system that can maintain and track the position of a single nanoparticle in three dimensions for a prolonged period has been disclosed. The system allows for continuously imaging the particle to observe any interactions it may have. The system also enables the acquisition of real-time sequential spectroscopic information from the particle. The apparatus holds great promise in performing single molecule spectroscopy and imaging on a non-stationary target.

Yang, Haw (Moraga, CA); Cang, Hu (Berkeley, CA); Xu, Cangshan (Berkeley, CA); Wong, Chung M. (San Gabriel, CA)

2011-07-19

342

70 FR 43646 - National Source Tracking of Sealed Sources  

Federal Register 2010, 2011, 2012, 2013

...3150-AH48 National Source Tracking of Sealed Sources AGENCY: Nuclear Regulatory...involving these sealed sources to the National Source Tracking System. These...of nationally tracked sources to the National Source Tracking System and...

2005-07-28

343

PUBLISHER'S ANNOUNCEMENT: Fast Track Communications  

NASA Astrophysics Data System (ADS)

We are very pleased to announce that Classical and Quantum Gravity will launch a new Fast Track Communications section from January 2007, after which date Letters to the Editor will no longer be published. Fast Track Communications (FTCs) are short, timely papers presenting only the most important new developments. To reflect their high significance FTCs will be published at the front of the journal and will be freely available online to ensure the widest visibility. As with all articles submitted to Classical and Quantum Gravity, there are no page charges, including online colour reproduction and multi-media attachments. Authors who wish to include colour in the print version of their article will, however, be required to cover the costs. Submissions to the new Fast Track Communications section are very welcome. For details of how to submit an FTC please visit IOP Publishing's webpages http://authors.iop.org, or contact the journal at cqg@iop.org. To facilitate refereeing, authors are asked to submit a short statement accompanying their FTC, outlining why they feel that the article merits high-priority publication. Length restrictions will also be applied such that FTCs should be a maximum of 8 journal pages (5000 words) in length. The section will aim to be a high-quality, high-profile outlet for new and important research of interest to the Classical and Quantum Gravity community. We look forward to seeing it grow and take shape over the next year.

Wald, Robert; Adams, Judith

2006-12-01

344

Central Tendency and Variability  

NSDL National Science Digital Library

This chapter presents two important interrelated topics in statistics: central tendency and variability. Measures of central tendency show how similar the data points in a set of data are, while measures of variability show how much the

Christmann, Edwin P.; Badgett, John L.

2008-11-01

345

Centralize Printing, and Save.  

ERIC Educational Resources Information Center

Describes the operations of a centralized printing office in a California school district. Centralization greatly increased the efficiency and lowered the cost of generating publications, information services, newsletters, and press releases throughout the school year. (TE)

McCormick, Kathleen

1984-01-01

346

Central line infections - hospitals  

MedlinePLUS

... and increase how long you are in the hospital. Your central line needs special care to prevent ... The hospital staff will use aseptic technique when a central line is put in your chest or arm. Aseptic ...

347

Central and peripheral demyelination  

PubMed Central

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

Mehndiratta, Man Mohan; Gulati, Natasha Singh

2014-01-01

348

Computer program TRACK_VISION for simulating optical appearance of etched tracks in CR-39 nuclear track detectors  

NASA Astrophysics Data System (ADS)

A computer program called TRACK_VISION for determining the optical appearances of tracks in nuclear track materials resulted from light-ion irradiation and subsequent chemical etching was described. A previously published software, TRACK_TEST, was the starting point for the present software TRACK_VISION, which contained TRACK_TEST as its subset. The programming steps were outlined. Descriptions of the program were given, including the built-in V functions for the commonly employed nuclear track material commercially known as CR-39 (polyallyldiglycol carbonate) irradiated by alpha particles. Program summaryProgram title: TRACK_VISION Catalogue identifier: AEAF_v1_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEAF_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 4084 No. of bytes in distributed program, including test data, etc.: 71 117 Distribution format: tar.gz Programming language: Fortran 90 Computer: Pentium PC Operating system: Windows 95+ RAM: 256 MB Classification: 17.5, 18 External routines: The entire code must be linked with the MSFLIB library. MSFLib is a collection of C and C++ modules which provides a general framework for processing IBM's AFP datastream. MSFLIB is specific to Visual Fortran (Digital, Compaq or Intel flavors). Nature of problem: Nuclear track detectors are commonly used for radon measurements through studying the tracks generated by the incident alpha particles. Optical microscopes are often used for this purpose but the process is relatively tedious and time consuming. Several automatic and semi-automatic systems have been developed in order to facilitate determination of track densities. In all these automatic systems, the optical appearance of the tracks is important. However, not much has been done so far to obtaining the optical appearances of etched tracks. Solution method: A computer program is prepared to study the optical characteristics of tracks in the CR-39 nuclear track detector using the ray tracing method. Based on geometrical optics, light propagation through the tracks is simulated and the brightness of all grid elements in the track wall is calculated. Additional comments: The program distribution file contains an executable which enables the program to be run on a Windows machine. The source code is also provided, but in order to build an executable the MSFLIB must be available. Running time: Running time depends mainly on the resolution (number of grid elements in the track wall) required by the user. Running time is normally less than 1 min.

Nikezic, D.; Yu, K. N.

2008-04-01

349

Tracking \\  

Microsoft Academic Search

Policy makers are calling for new socio-economic measures that reflect subjective well-being, to complement traditional measures of material welfare as the Gross Domestic Product (GDP). Self-reporting has been found to be reasonably accurate in measuring one's well-being and conveniently tallies with sentiment expressed on social media (e.g., those satisfied with life use more positive than negative words in their Facebook

Daniele Quercia; Jonathan Ellis; Licia Capra; Jon Crowcroft

2012-01-01

350

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

SciTech Connect

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.

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

351

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

PubMed Central

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. PMID:23127089

Buzurovic, I.; Yu, Y.; Werner-Wasik, M.; Biswas, T.; Anne, P. R.; Dicker, A. P.; Podder, T. K.

2012-01-01

352

Design of photovoltaic central power station concentrator array  

SciTech Connect

A design for a photovoltaic central power station using tracking concentrators has been developed. The 100 MW plant is assumed to be located adjacent to the Saguaro Power Station of Arizona Public Service. The design assumes an advanced Martin Marietta two-axis tracking fresnel lens concentrator. The concentrators are arrayed in 5 MW subfields, each with its own power conditioning unit. The photovoltaic plant output is connected to the existing 115 kV switchyard. The site specific design allows detailed cost estimates for engineering, site preparation, and installation. Collector and power conditioning costs have been treated parametrically.

Not Available

1984-02-01

353

Particle tracking around surface nanobubbles.  

PubMed

The exceptionally long lifetime of surface nanobubbles remains one of the biggest questions in the field. One of the proposed mechanisms for producing the stability is the dynamic equilibrium model, which describes a constant flux of gas in and out of the bubble. Here, we describe results from particle tracking experiments carried out to measure this flow. The results are analysed by measuring the Vorono cell size distribution, the diffusion, and the speed of the tracer particles. We show that there is no detectable difference in the movement of particles above nanobubble-laden surfaces as compared to ones above nanobubble-free surfaces. PMID:23598947

Dietrich, Erik; Zandvliet, Harold J W; Lohse, Detlef; Seddon, James R T

2013-05-01

354

Sensor-based animal tracking  

NASA Astrophysics Data System (ADS)

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.

Hunter, Andrew

355

Multiple lesion track structure model  

NASA Technical Reports Server (NTRS)

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.

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

1992-01-01

356

Alpha coherence predicts accuracy during a visuomotor tracking task.  

PubMed

It has been shown that synchrony of neuronal oscillations plays a critical role in effective communication between functionally distinct brain areas involving motor-sensory integration. However, the patterns of cortico-cortical coupling and their relation to behavioural success are widely unknown. Here, we analysed changes in cortico-cortical coherence during an unimanual visuomotor task and their correlation with performance. A 28-channel-EEG was attained in 27 healthy subjects during the tracking of an irregularly fluctuating target on a screen by manipulating a force sensor with the right index finger and thumb. For oscillatory power in the alpha (8-12 Hz) and the lower beta-band (beta1, 13-20 Hz), we found a decrease in central and occipital areas during performance. Interregional coherence between contralateral frontal and central areas was enhanced in the alpha band. In beta1, we observed a marked increase of coherence in centroparietal regions of both hemispheres extending to occipital and frontal regions in beta2 (21-30 Hz). Most prominently, correlation analysis between alpha coherence and performance accuracy indicated that higher occipitocentral (i.e. visuomotor) coherence is associated with better visuomotor performance whereas high tracking error is associated with enhanced frontocentral coupling, suggesting additional activation of a frontoparietal control network. These results provide further evidence that coherent brain oscillations in alpha and beta bands significantly contribute to effective functional integration of visual and motor areas. PMID:21964200

Rilk, Albrecht J; Soekadar, Surjo R; Sauseng, Paul; Plewnia, Christian

2011-11-01

357

Fluoroscopic tracking of multiple implanted fiducial markers using multiple object tracking  

NASA Astrophysics Data System (ADS)

When treating mobile tumors using techniques such as beam gating or beam tracking, precise localization of tumor position is required, which is often realized by fluoroscopically tracking implanted fiducial markers. Multiple markers placed inside or near a tumor are often preferred to a single marker for the sake of accuracy. In this work, we propose a marker tracking system that can track multiple markers simultaneously, without confusing them, and that is also robust enough to continue tracking even when the markers are moving behind bony anatomy. The integrated radiotherapy imaging system (IRIS), developed at the Massachusetts General Hospital (MGH), was used to take fluoroscopy videos for marker tracking. The tracking system integrates marker detection with a multiple object tracking process, inspired by the multiple hypothesis marker tracking (MHT) process. It also utilizes breathing pattern information to help tracking. Four criteria are used to identify tracking failure, and when tracking failure occurs, the system can immediately inform the user. (In the clinical environment, the system would immediately disable the treatment beam.) In this paper, two liver patients with implanted fiducial markers were studied, and the studies were performed retrospectively to assess the effectiveness of the new tracking system. For both patients, LAT and AP fluoroscopic videos were studied. In order to better test the proposed tracking system, artificial markers were added around the real markers to disturb the tracking of the real markers. The performance of the proposed system was compared to that of a conventional tracking system (one that did not use multiple object tracking). The performance of the new system was also investigated with and without consideration of the breathing pattern information. We found that the conventional tracking system can easily miss tracking markers in the presence of artificial markers, and it cannot detect the tracking failures. On the other hand, our proposed system can track markers well and can also successfully detect tracking failures. Failure rate was calculated on a per-frame-per-marker basis for the proposed tracking system. When the system considered breathing pattern information, it had a 0% failure rate 75% of the time and 0.4% failure rate 25% of the time. However, when the system did not consider breathing patterns, it had a much higher failure rate, in the range of 1.2%-12%. Both examples of the proposed system yielded low e95 (the maximum marker tracking error at 95% confidence level)less than 1.5 mm.

Tang, Xiaoli; Sharp, Greg C.; Jiang, Steve B.

2007-07-01

358

High resolution 3D insider detection and tracking.  

SciTech Connect

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.

Nelson, Cynthia Lee

2003-09-01

359

Efficient Object Tracking in WAAS Data Streams  

NASA Astrophysics Data System (ADS)

Wide area airborne surveillance (WAAS) systems are a new class of remote sensing imagers which have many military and civilian applications. These systems are characterized by long loiter times (extended imaging time over fixed target areas) and large footprint target areas. These characteristics complicate moving object detection and tracking due to the large image size and high number of moving objects. This thesis evaluates existing object detection and tracking algorithms with WAAS data and provides enhancements to the processing chain which decrease processing time and increase tracking accuracy. Decreases in processing time are needed to perform real-time or near real-time tracking either on the WAAS sensor platform or in ground station processing centers. Increased tracking accuracy benefits real-time users and forensic (off-line) users. The original contribution of this thesis increases tracking efficiency and accuracy by breaking a WAAS scene into hierarchical areas of interest (AOIs) and through the use of hyperspectral cueing.

Clarke, Trevor R. H.

360

Launch vehicle tracking enhancement through Global Positioning System Metric Tracking  

NASA Astrophysics Data System (ADS)

United Launch Alliance (ULA) initiated operational flights of both the Atlas V and Delta IV launch vehicle families in 2002. The Atlas V and Delta IV launch vehicles were developed jointly with the US Air Force (USAF) as part of the Evolved Expendable Launch Vehicle (EELV) program. Both Launch Vehicle (LV) families have provided 100% mission success since their respective inaugural launches and demonstrated launch capability from both Vandenberg Air Force Base (VAFB) on the Western Test Range and Cape Canaveral Air Force Station (CCAFS) on the Eastern Test Range. However, the current EELV fleet communications, tracking, & control architecture & technology, which date back to the origins of the space launch business, require support by a large and high cost ground footprint. The USAF has embarked on an initiative known as Future Flight Safety System (FFSS) that will significantly reduce Test Range Operations and Maintenance (O& M) cost by closing facilities and decommissioning ground assets. In support of the FFSS, a Global Positioning System Metric Tracking (GPS MT) System based on the Global Positioning System (GPS) satellite constellation has been developed for EELV which will allow both Ranges to divest some of their radar assets. The Air Force, ULA and Space Vector have flown the first 2 Atlas Certification vehicles demonstrating the successful operation of the GPS MT System. The first Atlas V certification flight was completed in February 2012 from CCAFS, the second Atlas V certification flight from VAFB was completed in September 2012 and the third certification flight on a Delta IV was completed October 2012 from CCAFS. The GPS MT System will provide precise LV position, velocity and timing information that can replace ground radar tracking resource functionality. The GPS MT system will provide an independent position/velocity S-Band telemetry downlink to support the current man-in-the-loop ground-based commanded destruct of an anomalous flight- The system utilizes a 50 channel digital receiver capable of navigating in high dynamic environments and high altitudes fed by antennas mounted diametrically opposed on the second stage airframe skin. To enhance cost effectiveness, the GPS MT System design implemented existing commercial parts and common environmental and interface requirements for both EELVs. The EELV GPS MT System design is complete, successfully qualified and has demonstrated that the system performs as simulated. This paper summarizes the current development status, system cost comparison, and performance capabilities of the EELV GPS MT System.

Moore, T. C.; Li, Hanchu; Gray, T.; Doran, A.

361

Seismic tracking of Hurricane Sandy  

NASA Astrophysics Data System (ADS)

Very weak, narrow band seismic signals excited by Hurricane Sandy are detected in cross-correlations of continuous waveforms recorded by stations in eastern United States, at the end of October 2012. We analyze propagational properties of the signal and track the source locations using travel-time difference residual projection, from 26 October to 1 November 2012. We find that (1) the seismic signals driven by Hurricane Sandy are azimuthal dependent. Signals are correlated only within close azimuths from the source, (2) seismic signals propagate as Rayleigh surface wave with an average velocity of about 3.3 km/s, and (3) the inferred seismic source locations follow the path of Sandy before UTC 2012.10.30 12:00:00(about half a day after its landfall in New Jersey), but then deviate from the hurricane center and stay in the coastal area near New England for another 12 hours after the hurricane dissipated. Our research discovers the properties of seismic source excited by Hurricane Sandy and demonstrates the capability of using seismic data to real-time track a hurricane and estimate its direct impacts and the subsequent disasters after it dissipates.

Chen, X.; Wen, L.

2013-12-01

362

IMMPDAF Approach for Road-Boundary Tracking  

Microsoft Academic Search

Robust road-boundary extraction\\/tracking is one of the main problems in autonomous roadway navigation. Although the road boundary can be defined by various means including lane markings, curbs, and borders of vegetation, this paper focuses on road-boundary tracking using curbs. A vehicle-mounted (downward tilted) 2-D laser-measurement system is utilized to detect the curbs. The tracking problem is difficult because both the

K. R. S. Kodagoda; Shuzhi Sam Ge; Wijerupage Sardha Wijesoma; Arjuna P. Balasuriya

2007-01-01

363

Compressive Object Tracking using Entangled Photons  

E-print Network

We present a compressive sensing protocol that tracks a moving object by removing static components from a scene. The implementation is carried out on a ghost imaging scheme to minimize both the number of photons and the number of measurements required to form a quantum image of the tracked object. This procedure tracks an object at low light levels with fewer than 3% of the measurements required for a raster scan, permitting us to more effectively use the information content in each photon.

Omar S. Magaa-Loaiza; Gregory A. Howland; Mehul Malik; John C. Howell; Robert W. Boyd

2013-06-10

364

Metaheuristics for the Index Tracking Problem  

Microsoft Academic Search

Passive portfolio management strategies such as Index Tracking have gained considerable attention the industry recently which\\u000a has also sparked some research interest. Index Tracking Problems are often complex in nature because of constraints on the\\u000a portfolio structure and the chosen measure for the Tracking Error, quickly defying the use of traditional deterministic methods.\\u000a Heuristic search and optimizationmethods, on the other

Giacomo di Tollo; Dietmar Maringer

365

GPS tracking and the right of privacy  

Microsoft Academic Search

Government authorities and law enforcement agencies start using the satellite-based GPS tracking technology more often for\\u000a various purposes. Due to its unique technical features, GPS tracking poses a much greater threat to the right of privacy compared\\u000a with traditional electronic tracking techniques, such as the Beeper. Comparisons are extensively analyzed and a number of\\u000a the US cases are quoted for

Jianmei Cen

2011-01-01

366

Eigenspace-based tracking for feature points  

NASA Astrophysics Data System (ADS)

Feature point tracking deals with image streams that change over time. Most existing feature point tracking algorithms only consider two adjacent frames at a time, and forget the feature information of previous frames. In this paper, we present a new eigenspace-based tracking method that learns an eigenspace representation of training features online, and finds the target feature point with Gauss-Newton style search method. A coarse-to-fine processing strategy is introduced to handle large affine transformations. Several simulations and experiments on real images indicate the effectiveness of the proposed feature tracking algorithm under the conditions of large pose changes and temporary occlusions.

Peng, Chen; Chen, Qian; Qian, Wei-xian

2014-05-01

367

Multiple hypothesis tracking for the cyber domain  

NASA Astrophysics Data System (ADS)

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.

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

2011-09-01

368

Modular Track System For Positioning Mobile Robots  

NASA Technical Reports Server (NTRS)

Conceptual system for positioning mobile robotic manipulators on large main structure includes modular tracks and ancillary structures assembled easily along with main structure. System, called "tracked robotic location system" (TROLS), originally intended for application to platforms in outer space, but TROLS concept might also prove useful on Earth; for example, to position robots in factories and warehouses. T-cross-section rail keeps mobile robot on track. Bar codes mark locations along track. Each robot equipped with bar-code-recognizing circuitry so it quickly finds way to assigned location.

Miller, Jeff

1995-01-01

369

CDC's National Environmental Public Health Tracking Network WASHINGTON Keeping Track, Promoting Health  

E-print Network

poisoning and carbon monoxide exposure are important environmental public health concerns for Washington poisoning from carbon Washington Tracking Network scientists The Washington Building Code Council monoxide Problem Tracking in Action Improved Public Health Preventing accidental carbon monoxide deaths Accidental

370

Superior Augmented Reality Registration by Integrating Landmark Tracking and Magnetic Tracking  

E-print Network

Superior Augmented Reality Registration by Integrating Landmark Tracking and Magnetic Tracking Accurate registration between real and virtual objects is crucial for augmented reality applications and Techniques]: Interaction techniques. Additional Keywords and Phrases: Augmented reality, stereo video see

State, Andrei

371

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

Code of Federal Regulations, 2013 CFR

...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...

2013-10-01

372

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

Code of Federal Regulations, 2012 CFR

...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...

2012-10-01

373

Is bank supervision central to central banking?  

Microsoft Academic Search

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

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

1999-01-01

374

Simulation of vehicletrack interaction with flexible wheelsets, moving track models and field tests  

Microsoft Academic Search

Vehicletrack dynamic interaction emerged as a key multi-aspect subject following the development in high-speed and high axle-load trains. In this context, wheelset structural flexibility and track flexibility are the two main factors that contribute to high frequency content of the wheelrail forces and influence the vehicletrack damage. Appropriate wheelset and track flexibility models are hence of great importance in pertinent

Nizar Chaar; Mats Berg

2006-01-01

375

Event-driven track management method for robust multi-vehicle tracking  

Microsoft Academic Search

In this paper, we present an event-driven track management method to detect reliably and track robustly while minimizing missing and false detections. No state-of-the-art vehicle detection method can detect all the vehicles on the road without error. A multi-vehicle tracking method is essential to minimize the number of missing and false detections. In a multi-vehicle tracking method, there are three

Young-Chul Lim; Chung-Hee Lee; Soon Kwon; Jonghwan Kim

2011-01-01

376

A Probabilistic Cell Tracking Algorithm  

NASA Astrophysics Data System (ADS)

The research described below was carried out during the EU-Project Lolight - development of a low cost, novel and accurate lightning mapping and thunderstorm (supercell) tracking system. The Project aims to develop a small-scale tracking method to determine and nowcast characteristic trajectories and velocities of convective cells and cell complexes. The results of the algorithm will provide a higher accuracy than current locating systems distributed on a coarse scale. Input data for the developed algorithm are two temporally separated lightning density fields. Additionally a Monte Carlo method minimizing a cost function is utilizied which leads to a probabilistic forecast for the movement of thunderstorm cells. In the first step the correlation coefficients between the first and the second density field are computed. Hence, the first field is shifted by all shifting vectors which are physically allowed. The maximum length of each vector is determined by the maximum possible speed of thunderstorm cells and the difference in time for both density fields. To eliminate ambiguities in determination of directions and velocities, the so called Random Walker of the Monte Carlo process is used. Using this method a grid point is selected at random. Moreover, one vector out of all predefined shifting vectors is suggested - also at random but with a probability that is related to the correlation coefficient. If this exchange of shifting vectors reduces the cost function, the new direction and velocity are accepted. Otherwise it is discarded. This process is repeated until the change of cost functions falls below a defined threshold. The Monte Carlo run gives information about the percentage of accepted shifting vectors for all grid points. In the course of the forecast, amplifications of cell density are permitted. For this purpose, intensity changes between the investigated areas of both density fields are taken into account. Knowing the direction and speed of thunderstorm cells is important for nowcasting. Therefore, the presented method is based on IC discharges which account for most lightning discharges and occur minutes before the first CG discharge. The cell tracking algorithm will be used as part of the integrated LoLight system. The research leading to these results has received funding from the European Union's Seventh Framework Programme managed by REA-Research Executive Agency http://ec.europa.eu/research/rea ([FP7/2007-2013] [FP7/2007-2011]) under grant agreement n [262200].

Steinacker, Reinhold; Mayer, Dieter; Leiding, Tina; Lexer, Annemarie; Umdasch, Sarah

2013-04-01

377

Eye-Tracking: Characteristics and Methods Eye-Tracking: Research Areas and Applications  

E-print Network

1 Part 1 Eye-Tracking: Characteristics and Methods Part 2 Eye-Tracking: Research Areas. & Bowlin, G. (Eds.) [ PREPRINT, FEB 2004. PLEASE DO NOT QUOTE ] #12;2 Eye-Tracking: Characteristics and Methods Introduction Eye movements are arguably the most frequent of all human movements (Bridgeman, 1992

Richardson, Daniel C.

378

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

ERIC Educational Resources Information Center

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

Werblow, Jacob; Urick, Angela; Duesbery, Luke

2013-01-01

379

Integrating plan-view tracking and color-based person models for multiple people tracking  

Microsoft Academic Search

Tracking multiple people in a dynamic environment is important in many applications. Recent research in this area has focused either on geometric analysis or appearance models. In this paper we distinguish four types of tracking problems, and then describe an approach for combining ge- ometric analysis and appearance-based tracking to \\

Luca Iocchi; Robert C. Bolles

2005-01-01

380

The Six Track Scherzer Rolling Lift Bridge?Two double track spans ...  

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

The Six Track Scherzer Rolling Lift Bridge?Two double track spans closed. One double-track span open. Photocopy of plate xvi in Scherzer Rolling Lift Bridge Company, Scherzer Rolling Lift Bridges. - New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Lift Bridge, Spanning Fort Point Channel, Boston, Suffolk County, MA

381

The administration of the NASA space tracking system and the NASA space tracking system in Australia  

NASA Technical Reports Server (NTRS)

The international activities of the NASA space program were studied with emphasis on the development and maintenance of tracking stations in Australia. The history and administration of the tracking organization and the manning policies for the stations are discussed, and factors affecting station operation are appraised. A field study of the Australian tracking network is included.

Hollander, N.

1973-01-01

382

Novel Ultrasound Guidance System for Real-time Central Venous Cannulation: Safety and Efficacy  

PubMed Central

Introduction Real-time ultrasound guidance is considered to be the standard of care for central venous access for non-emergent central lines. However, adoption has been slow, in part because of the technical challenges and time required to become proficient. The AxoTrack system (Soma Access Systems, Greenville, SC) is a novel ultrasound guidance system recently cleared for human use by the United States Food and Drug Administration (FDA). Methods After FDA clearance, the AxoTrack system was released to three hospitals in the United States. Physicians and nurse practitioners who work in the intensive care unit or emergency department and who place central venous catheters were trained to use the AxoTrack system. De-identified data about central lines placed in living patients with the AxoTrack system was prospectively gathered at each of the three hospitals for quality assurance purposes. After institutional review board approval, we consolidated the data for the first five months of use for retrospective review. Results The AxoTrack system was used by 22 different health care providers in 50 consecutive patients undergoing central venous cannulation (CVC) from September 2012 to February 2013. All patients had successful CVC with the guidance of the AxoTrack system. All but one patient (98%) had successful cannulation on the first site attempted. There were no reported complications, including pneumothorax, hemothorax, arterial puncture or arterial cannulation. Conclusion The AxoTrack system was a safe and effective means of CVC that was used by a variety of health care practitioners. PMID:25035764

Ferre, Robinson M.; Mercier, Mark

2014-01-01

383

Vestibulo-Cervico-Ocular Responses and Tracking Eye Movements after Prolonged Exposure to Microgravity  

NASA Technical Reports Server (NTRS)

The vestibular function and tracking eye movements were investigated in 12 Russian crew members of ISS missions on days 1(2), 4(5-6), and 8(9-10) after prolonged exposure to microgravity (126 to 195 days). The spontaneous oculomotor activity, static torsional otolith-cervico-ocular reflex, dynamic vestibulo-cervico-ocular responses, vestibular reactivity, tracking eye movements, and gaze-holding were studied using videooculography (VOG) and electrooculography (EOG) for parallel eye movement recording. On post-flight days 1-2 (R+1-2) some cosmonauts demonstrated: - an increased spontaneous oculomotor activity (floating eye movements, spontaneous nystagmus of the typical and atypical form, square wave jerks, gaze nystagmus) with the head held in the vertical position; - suppressed otolith function (absent or reduced by one half amplitude of torsional compensatory eye counter-rolling) with the head inclined statically right- or leftward by 300; - increased vestibular reactivity (lowered threshold and increased intensity of the vestibular nystagmus) during head turns around the longitudinal body axis at 0.125 Hz; - a significant change in the accuracy, velocity, and temporal characteristics of the eye tracking. The pattern, depth, dynamics, and velocity of the vestibular function and tracking eye movements recovery varied with individual participants in the investigation. However, there were also regular responses during readaptation to the normal gravity: - suppression of the otolith function was typically accompanied by an exaggerated vestibular reactivity; - the structure of visual tracking (the accuracy of fixational eye rotations, smooth tracking, and gaze-holding) was disturbed (the appearance of correcting saccades, the transition of smooth tracking to saccadic tracking) only in those cosmonauts who, in parallel to an increased reactivity of the vestibular input, also had central changes in the oculomotor system (spontaneous nystagmus, gaze nystagmus).

Kornilova, L. N.; Naumov, I. A.; Azarov, K. A.; Sagalovitch, S. V.; Reschke, Millard F.; Kozlovskaya, I. B.

2007-01-01

384

The Track Imaging Cerenkov Experiment  

NASA Technical Reports Server (NTRS)

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.

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

385

Satellite animal tracking feasibility studies  

NASA Technical Reports Server (NTRS)

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.

Buechner, H. K.

1975-01-01

386

The track imaging Cherenkov experiment  

NASA Astrophysics Data System (ADS)

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.

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

387

The Track Imaging Cerenkov Experiment  

NASA Astrophysics Data System (ADS)

The Track Imaging Cerenkov Experiment (TrICE) implements a method for making a precision measurement of cosmic-ray composition at TeV energies. The telescope is designed to distinguish two components of Cerenkov emission associated with a cosmic-ray nucleus interacting in the atmosphere. One component is caused by the primary nucleus before the first hadronic interaction occurs, and the other is produced by the extensive air shower following that interaction. Separation of the direct and air shower light gives measurements of the primary particle charge and energy on an event-by-event basis. An imaging Cerenkov telescope with sufficient angular and temporal resolution can achieve this. We will discuss the direct Cerenkov method and report on the status of TrICE.

Hays, Elizabeth

2006-09-01

388

Position and orientation tracking system  

DOEpatents

A position and orientation tracking system presents a laser scanning apparatus having two measurement pods, a control station, and a detector array. The measurement pods can be mounted in the dome of a radioactive waste storage silo. Each measurement pod includes dual orthogonal laser scanner subsystems. The first laser scanner subsystem is oriented to emit a first line laser in the pan direction. The second laser scanner is oriented to emit a second line laser in the tilt direction. Both emitted line lasers scan planes across the radioactive waste surface to encounter the detector array mounted on a target robotic vehicle. The angles of incidence of the planes with the detector array are recorded by the control station. Combining measurements describing each of the four planes provides data for a closed form solution of the algebraic transform describing the position and orientation of the target robotic vehicle. 14 figs.

Burks, B.L.; DePiero, F.W.; Armstrong, G.A.; Jansen, J.F.; Muller, R.C.; Gee, T.F.

1998-05-05

389

Position and orientation tracking system  

DOEpatents

A position and orientation tracking system presents a laser scanning appaus having two measurement pods, a control station, and a detector array. The measurement pods can be mounted in the dome of a radioactive waste storage silo. Each measurement pod includes dual orthogonal laser scanner subsystems. The first laser scanner subsystem is oriented to emit a first line laser in the pan direction. The second laser scanner is oriented to emit a second line laser in the tilt direction. Both emitted line lasers scan planes across the radioactive waste surface to encounter the detector array mounted on a target robotic vehicle. The angles of incidence of the planes with the detector array are recorded by the control station. Combining measurements describing each of the four planes provides data for a closed form solution of the algebraic transform describing the position and orientation of the target robotic vehicle.

Burks, Barry L. (Oak Ridge, TN); DePiero, Fred W. (Knoxville, TN); Armstrong, Gary A. (Oak Ridge, TN); Jansen, John F. (Knoxville, TN); Muller, Richard C. (Oak Ridge, TN); Gee, Timothy F. (Riceville, TN)

1998-01-01

390

The Track Imaging Cerenkov Experiment  

NASA Technical Reports Server (NTRS)

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.

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

391

Central American update  

Microsoft Academic Search

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,

1987-01-01

392

Back to Central Tolerance  

Microsoft Academic Search

The establishment and maintenance of immunological tolerance entails both central and peripheral mechanisms. The latter have been highlighted in the past several years, mostly because of great interest in the activities of regulatory T cells. However, an important role for central tolerance mechanisms has been reemphasized by recent results on human autoimmune diseases, including APECED and type 1 diabetes.

Diane Mathis; Christophe Benoist

2004-01-01

393

CDF Central Outer Tracker  

Microsoft Academic Search

The Central Outer Tracker is a large cylindrical drift chamber constructed to replace Collider Detector at Fermilab's original central drift chamber for the higher luminosity expected for Run 2 at the Fermilab Tevatron. The chamber's drift properties are described in the context of meeting the operating requirements for Run 2. The design and construction of the chamber, the front-end readout

T. Affolder; D. Allspach; D. Ambrose; J. Bialek; W. Bokhari; M. Brozovic; M. Binkley; K. Burkett; A. Byon-Wagner; F. Cogswell; N. Dressnandt; Z. Feng; M. Franklin; L. Galtieri; D. W Gerdes; J. Greenwood; V. Guarino; J Guimaraes da Costa; R. Haggerty; C. Hall; J. Heinrich; A. Holloway; T. Jacobi; K. Kephart; D. Khazins; Y. K Kim; M. Kirby; W. Kononenko; A. V. Kotwal; J. Kraus; T. M Liss; N. Lockyer; R. Madrak; T. Miao; A. Mukherjee; C. Neu; M. Newcomer; J. M Niczyporuk; L. Nodulman; W. Orejudous; T. J Phillips; K. T Pitts; W. Reigler; R. Richards; C. Rivetta; W. J Robertson; R. Roser; L. Sadler; R. Sandberg; S. Sansone; R. Schmitt; K. Schultz; D. Shuman; R. Silva; P. Singh; R. Snihur; P. Tamburello; J. Taylor; R. Thurman-Keup; D. Tousignant; F. Ukegawa; R Van Berg; G. Veramendi; T. Vickey; J. Wacker; R. L Wagner; R. Weidenbach; W. C Wester; H. H. Williams; P. Wilson; P. Wittich; A. Yagil; I. Yu; S. Yu; J. C Yun

2004-01-01

394

GPU COMPUTING FOR PARTICLE TRACKING  

SciTech Connect

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.

Nishimura, Hiroshi; Song, Kai; Muriki, Krishna; Sun, Changchun; James, Susan; Qin, Yong

2011-03-25

395

Quantification of Line Tracking Solutions for Automotive Applications  

NASA Astrophysics Data System (ADS)

Unlike line tracking in automotive painting applications, line tracking for automotive general assembly applications requires position tracking in order to perform assembly operations to a required assembly tolerance. Line tracking quantification experiments have been designed and conducted for a total of 16 test cases for two line tracking scenarios with three types of line tracking solutions: encoder based tracking, encoder plus static vision based tracking, and the analog sensor-based tracking for general assembly robotic automation. This chapter presents the quantification results, identifies key performance drivers, and illustrates their implications for automotive assembly applications.

Shi, Jane; Rourke, Rick F.; Groll, Dave; Tavora, Peter W.

396

Central Banking Resource Center  

NSDL National Science Digital Library

Central Banks of the World is a pointers page to central banks and central bank information for over 45 countries, as well as multilateral financial institutions, research and training establishments, and conference information. To show how little is generally known about the history of central banking in the United States, this site includes an email message sent to the webmaster of the First Bank of the United States, promoting a certain software company's web interactivity applications. Of course, since the First Bank of the United States was closed in 1811, its web site is primarily historical. The Central Banks site lists over 30 Internet directories and pointers pages that list the First Bank of the United States as a functioning financial institution. To help remedy this situation, the site includes a pointer to a brief history of banking in the US.

1996-01-01

397

Measurement of F2cc and F2bb at H1Measurement of F2cc and F2bb at H1 Andrew Mehta University of Liverpool  

E-print Network

-VFNS PDFs #12;Experimental Technique Other main methods: D* to tag charm Displaced tracks Muons and jets Use method and D* method. Good agreement with different techniques. Data described by QCD. More variation from muon plus jetZEUS from muon plus jet. ZEUS data tend to be a little higher than H1ZEUS data tend

398

Operational multi-sensor tracking for air defense  

Microsoft Academic Search

This paper describes the multiple target multisensor tracking (MST) system that has been developed by CelsiusTech Systems AB for air defense purposes. The kinematic tracking principles are first treated. An interactive multiple model (IMM) filter, together with track oriented multiple hypothesis tracking (MHT) and automatic bias estimation schemes, result in a high overall tracking performance. An arbitrary mix of active

Torbjorn Wigren; Egils Sviestins; Henrik Egnell

1996-01-01

399

Real Time Mean Shift Tracking using Optical Flow Distribution  

Microsoft Academic Search

This paper describes about real-time object tracking method based on mean shift tracking algorithm. The mean shift tracking algorithm is an efficient technique for tracking object through an image. The original mean shift tracking is proposed to apply the color image based on the color distribution. A near-infrared camera is used with surveillance system to take in the dark. It

N. Oshima; T. Saitoh; R. Konishi

2006-01-01

400

Multiple-object tracking while driving: the multiple-vehicle tracking task.  

PubMed

Many contend that driving an automobile involves multiple-object tracking. At this point, no one has tested this idea, and it is unclear how multiple-object tracking would coordinate with the other activities involved in driving. To address some of the initial and most basic questions about multiple-object tracking while driving, we modified the tracking task for use in a driving simulator, creating the multiple-vehicle tracking task. In Experiment 1, we employed a dual-task methodology to determine whether there was interference between tracking and driving. Findings suggest that although it is possible to track multiple vehicles while driving, driving reduces tracking performance, and tracking compromises headway and lane position maintenance while driving. Modified change-detection paradigms were used to assess whether there were change localization advantages for tracked targets in multiple-vehicle tracking. When changes occurred during a blanking interval, drivers were more accurate (Experiment 2a) and ~250ms faster (Experiment 2b) at locating the vehicle that changed when it was a target rather than a distractor in tracking. In a more realistic driving task where drivers had to brake in response to the sudden onset of brake lights in one of the lead vehicles, drivers were more accurate at localizing the vehicle that braked if it was a tracking target, although there was no advantage in terms of braking response time. Overall, results suggest that multiple-object tracking is possible while driving and perhaps even advantageous in some situations, but further research is required to determine whether multiple-object tracking is actually used in day-to-day driving. PMID:24946866

Lochner, Martin J; Trick, Lana M

2014-11-01

401

Contour Tracking in Clutter: A Subset Approach  

Microsoft Academic Search

A new method for tracking contours of moving objects in clutter is presented. For a given object, a model of its contours is learned from training data in the form of a subset of contour space. Greater complexity is added to the contour model by analyzing rigid and non-rigid transformations of contours separately. In the course of tracking, multiple contours

Daniel Freedman; Michael S. Brandstein

2000-01-01

402

Galilean Tracks in the Physics Lab  

ERIC Educational Resources Information Center

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

Hellman, Walter

2011-01-01

403

Technology survey on video face tracking  

NASA Astrophysics Data System (ADS)

With the pervasiveness of monitoring cameras installed in public areas, schools, hospitals, work places and homes, video analytics technologies for interpreting these video contents are becoming increasingly relevant to people's lives. Among such technologies, human face detection and tracking (and face identification in many cases) are particularly useful in various application scenarios. While plenty of research has been conducted on face tracking and many promising approaches have been proposed, there are still significant challenges in recognizing and tracking people in videos with uncontrolled capturing conditions, largely due to pose and illumination variations, as well as occlusions and cluttered background. It is especially complex to track and identify multiple people simultaneously in real time due to the large amount of computation involved. In this paper, we present a survey on literature and software that are published or developed during recent years on the face tracking topic. The survey covers the following topics: 1) mainstream and state-of-the-art face tracking methods, including features used to model the targets and metrics used for tracking; 2) face identification and face clustering from face sequences; and 3) software packages or demonstrations that are available for algorithm development or trial. A number of publically available databases for face tracking are also introduced.

Zhang, Tong; Gomes, Herman Martins

2014-03-01

404

Real-time closed-world tracking  

Microsoft Academic Search

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

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

1997-01-01

405

Infrared search and track demonstrator programme  

Microsoft Academic Search

The objective of the infrared search and track (IRST) program is to develop demonstration hardware which will be capable of long range detection and tracking of air targets in an airborne environment. This paper describes each of the major subsystems of the IRST equipment, which comprises the pointing system, the thermal imaging systems and the signal processing system. The various

W. D. McGinn; C. J. Tucker; S. Nallanthighal

1994-01-01

406

Infrared search and track demonstrator program  

Microsoft Academic Search

The objective of the infrared search and track (IRST) demonstrator program is to develop demonstration hardware which will be capable of long range detection and tracking of air targets in an airborne environment. This paper describes each of the major subsystems of the IRST equipment, which comprises the pointing system, the thermal imaging system and the signal processing system. The

William D. McGinn; R. Nallanthighal

1993-01-01

407

Tracking radar studies of bird migration  

NASA Technical Reports Server (NTRS)

The application of tracking radar for determining the flight paths of migratory birds is discussed. The effects produced by various meteorological parameters are described. Samples of radar scope presentations obtained during tracking studies are presented. The characteristics of the radars and their limitations are examined.

Williams, T. C.; Williams, J. M.; Teal, J. M.; Kanwisher, J. W.

1972-01-01

408

TRACK Internet Service 3.1 Introduction  

E-print Network

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

Froude, Lizzie

409

Three-Dimensional Visualization of Particle Tracks.  

ERIC Educational Resources Information Center

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)

Julian, Glenn M.

1993-01-01

410

Along-Track Reef Imaging System (ATRIS)  

USGS Publications Warehouse

"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.

Brock, John; Zawada, Dave

2006-01-01

411

Multisensor Multitarget Mixture Reduction Algorithms for Tracking  

E-print Network

Multisensor Multitarget Mixture Reduction Algorithms for Tracking Lucy Y. Pao Signal Processing Department The MITRE Corporation Bedford, Massachusetts 01730 Abstract A single�sensor single�target Mixture In the problem of tracking targets in random clutter, the optimal Bayesian solution leads to Gaussian mixture

Pao, Lucy Y.

412

Data fusion for visual tracking with particles  

Microsoft Academic Search

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

Patrick Perez; Jaco Vermaak; Andrew Blake

2004-01-01

413

Thermal stability of laser tracking interferometer calibration  

Microsoft Academic Search

Uncompensated thermomechanical errors in laser tracking interferometers are examined by evaluating the difference between tracking interferometer compensations in a controlled laboratory environment versus being compensated in a factory environment. The hypothesis under test was that compensation in a factory environment does not adversely affect, and may actually improve, the uncertainty of laser tracker systems. This hypothesis was confirmed by measuring

Scott C. Sandwith

1999-01-01

414

Rotorcraft Trajectory Tracking by Supervised NLI Control  

E-print Network

for a four rotor aircraft with fixed pitch blades, or rotorcraft, are considered. One important limitation tracking by a four rotor aircraft is considered. After introducing the flight dynamics equations for the four rotor aircraft, a trajectory tracking control structure based on a two layer non linear inverse

Boyer, Edmond

415

Mobile GPS tracking system using Holger Vmel  

E-print Network

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

Vömel, Holger

416

UPTIME: Ubiquitous pedestrian tracking using mobile phones  

Microsoft Academic Search

The mission of tracking a pedestrian is valuable for many applications including walking distance estimation for the purpose of pervasive healthcare, museum and shopping mall guides, and locating emergency responders. In this paper, we show how accurate and ubiquitous tracking of a pedestrian can be performed using only the inertial sensors embedded in his\\/her mobile phone. Our work depends on

Moustafa Alzantot; Moustafa Youssef

2012-01-01

417

Along-Track Reef Imaging System (ATRIS)  

USGS Publications Warehouse

'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.

Brock, John; Zawada, Dave

2006-01-01

418

Pre cis of Tracking Truth sherrilyn roush  

E-print Network

Pre´ cis of Tracking Truth sherrilyn roush University of California, Berkeley In Tracking Truth I such imperfection as nothing but failure is to fall into the trap of making the perfect the enemy of the good't follow that there is nothing to be gained in the project of formulating general definitions

419

Cocoa-tracking in aerial imagery  

Microsoft Academic Search

Unmanned Aerial Vehicles (UAVs) are becoming a core intelligence asset for reconnaissance, surveillance and target tracking in urban and battlefield settings. In order to achieve the goal of automated tracking of objects in UAV videos we have developed a system called COCOA. It processes the video stream through number of stages. At first stage platform motion compensation is performed. Moving

M Shah

2006-01-01

420

Singularity Analysis for Articulated Object Tracking  

Microsoft Academic Search

We analyze the use of kinematic constraints for artic- ulated object tracking. Conditions for the occurrence of singularities in 3-D models are presented and their effects on tracking are characterized. We describe a novel 2-D Scaled Prismatic Model (SPM) for figure registration. In contrast to 3-D kinematic models, the SPM has fewer sin- gularity problems and does not require detailed

Daniel D. Morris; James M. Rehg

1998-01-01

421

Infrared small target tracking based on SOPC  

NASA Astrophysics Data System (ADS)

The paper presents a low cost FPGA based solution for a real-time infrared small target tracking system. A specialized architecture is presented based on a soft RISC processor capable of running kernel based mean shift tracking algorithm. Mean shift tracking algorithm is realized in NIOS II soft-core with SOPC (System on a Programmable Chip) technology. Though mean shift algorithm is widely used for target tracking, the original mean shift algorithm can not be directly used for infrared small target tracking. As infrared small target only has intensity information, so an improved mean shift algorithm is presented in this paper. How to describe target will determine whether target can be tracked by mean shift algorithm. Because color target can be tracked well by mean shift algorithm, imitating color image expression, spatial component and temporal component are advanced to describe target, which forms pseudo-color image. In order to improve the processing speed parallel technology and pipeline technology are taken. Two RAM are taken to stored images separately by ping-pong technology. A FLASH is used to store mass temp data. The experimental results show that infrared small target is tracked stably in complicated background.

Hu, Taotao; Fan, Xiang; Zhang, Yu-Jin; Cheng, Zheng-dong; Zhu, Bin

2011-01-01

422

Montana State University Tenure Track Faculty Position  

E-print Network

Montana State University Bozeman Tenure Track Faculty Position Vacancy Announcement 6 Research Center Search Number 13-372 Start Date January 1, 2014 Appointment Full-time (1.0 FTE) tenure-track, the development of a field- oriented research/extension program that focuses on cultivar selection and optimal

423

Illumination-Invariant Tracking via Graph Cuts  

Microsoft Academic Search

Illumination changes are a ubiquitous problem in com- puter vision. They present a challenge in many applications, including tracking: for example, an object may move in and out of a shadow. We present a new tracking algorithm which is insensitive to illumination changes, while at the same time using all of the available photometric information. The algorithm is based on

Daniel Freedman; Matthew W. Turek

2005-01-01

424

Layer tracking asymptotics and domain decomposition  

SciTech Connect

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.

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

425

CONSERVATIVE FRONT TRACKING WITH IMPROVED ACCURACY  

Microsoft Academic Search

We propose a fully conservative front tracking algorithm for systems of nonlinear conservation laws. The algorithm improves by one order in its convergence rate over most finite difference schemes. Near tracked discontinuities in the solution, the proposed algorithm has O(?x) errors, improving over O(1) errors commonly found near a discontinuity. Numerical experiments which confirm these assertions are presented. 1. Introduction.

JAMES GLIMM; XIAOLIN LI; YINGJIE LIU; ZHILIANG XU; NING ZHAO; SIAM J. NUMER

2003-01-01

426

ISRO telemetry, tracking and command network  

Microsoft Academic Search

This paper describes the requirements to be met by the ISRO telemetry, tracking, and command (TTC) network ISTRAC for the support of launch vehicle and spacecraft missions. The TTC requirements of launch and spacecraft missions are outlined, and the ISTRAC ground station configuration is described. The characteristics of a typical ground station are given, and the communication and tracking systems

K. V. Venkatachary; R. Nandakumar

1988-01-01

427

Minitrack tracking function description, volume 2  

NASA Technical Reports Server (NTRS)

The minitrack tracking function is described and specific operations are identified. The subjects discussed are: (1) preprocessor listing, (2) minitrack hardware, (3) system calibration, (4) quadratic listing, and (5) quadratic flow diagram. Detailed information is provided on the construction of the tracking system and its operation. The calibration procedures are supported by mathematical models to show the application of the computer programs.

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

1973-01-01

428

Satellite attitude tracking control under control saturation  

Microsoft Academic Search

The main problem addressed is modified Rodrigues parameter (MRP) based, attitude tracking control of rigid satellite. First a nonlinear control scheme is presented under control input saturation. The control scheme is shown to achieve global asymptotic stability for the whole tracking error states through a rigorous Lyapunov analysis. Then we give a control scheme not only to deal with the

Jianting Lv; Dai Gaol; Xibin Cao

2008-01-01

429

Improved hypothesis selection for multiple hypothesis tracking  

Microsoft Academic Search

The need to track closely-spaced targets in clutter is essential in support of military operations. This paper presents a Multiple Hypothesis Tracking (MHT) algorithm which uses an efficient structure to represent the dependency which naturally arises between targets due to the joint observation process, and an Integral Square Error (ISE) mixture reduction algorithm for hypothesis control. The resulting algorithm, denoted

Juan R. Vasquez; Jason L. Williams

2004-01-01

430

Improved Hypothesis Selection for Multiple Hypothesis Tracking  

Microsoft Academic Search

The need to track closely-spaced targets in clutter is essential in support of military operations. This paper presents a Multiple Hypothesis Tracking (MHT) algorithm which uses an e cient structure to represent the dependency which naturally arises between targets due to the joint observation process, and an Integral Square Error (ISE) mixture reduction algorithm for hypothesis control. The resulting algorithm,

Juan R. Vasquez; Jason L. Williams

431

Adaptive Feature Selection for Infrared Object Tracking  

Microsoft Academic Search

This paper proposes a novel object tracking algorithm for the infrared object tracking. To improve the discrimination ability of the object model, the gray features which can be used to distinguish the object from its surrounding background is chosen to represent the object. This algorithm defines a discrimination function of gray features, and the \\

ShuPeng Wang

2010-01-01

432

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 package for concrete pavement sustainability (initiated1/10) · A conference on sustainability of concrete

433

Solar tracking control system Sun Chaser  

NASA Technical Reports Server (NTRS)

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.

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

1978-01-01

434

Predicting Nucleosome Positioning Using Multiple Evidence Tracks  

E-print Network

a chromosome based on one or more genomic input tracks containing position-specific information (evidence", which consists of a bundle of eight histone proteins around which is wound approx- imately 147 basePredicting Nucleosome Positioning Using Multiple Evidence Tracks Sheila M. Reynolds1 , Zhiping Weng

Noble, William Stafford

435

High Speed in Europe Slab Track Systems  

E-print Network

) · Long-Term experiences - Germany since 1972 in Railway Station of Rheda Slab Track 6 #12; Rheda after unconditioned application of Eddy Current Brake)) · No problems with vegetation control which is essential for a ballasted structure · A snaking railway route with extreme track parameters · No ballast swirling at high

Barkan, Christopher P.L.

436

Marble track music sequencers for children  

Microsoft Academic Search

We discuss the development of electronically enhanced construction kits for marble tracks that act as music sequencers for music education of young children. Marbles rolling along the tracks trigger sound events to produce the playback of musical notes and songs. Re-arrangeable tangible elements correspond to timing, durations and pitches of notes and thus allow electronic music sequencing by means of

Thomas Fischer; Wing Lau

2006-01-01

437

Discrete track electrodynamic maglev Part I: Modelling  

Microsoft Academic Search

Since the dawn of maglev transportation technology in the 1970's, a great variety of models for electrody- namic suspension (EDS) magnetic levitation (maglev) have been presented. This article unifies these models by deriving equations for discrete track EDS maglev (with stranded or solid conductors), and introduces criteria required to justify the approximation of track currents by current filaments. Parallels to

Bradley E Paden

2005-01-01

438

Tracking planar orientations of active MRI needles  

Microsoft Academic Search

Purpose: To determine and track the planar orientation of active interventional devices without using localizing RF microcoils. Materials and Methods: An image-based tracking method that determines a device's orientation using projection im- ages was developed. An automated and a manual detection scheme were implemented. The method was demonstrated in an in vivo mesocaval puncture procedure in swine, which required accurate

Shashank Sathyanarayana; Pelin Aksit; Aravind Arepally; Parag V. Karmarkar; Meiyappan Solaiyappan; Ergin Atalar

2007-01-01

439

Education Track ANSC 162 Language, Identity & Community  

E-print Network

Education Track ANSC 162 Language, Identity & Community COMT 115 Media and Design/Social Learning Disorders in Children USP 145 Aging-Social and Health Policy Issues Social Issues Track BIEB 140 Social Organization/Education EDS 130 Intro To Academic Mentoring Of Elementary School Students EDS 136

Russell, Lynn

440

Robust Multiple Car Tracking with Occlusion Reasoning  

Microsoft Academic Search

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

Dieter Koller; Joseph Weber; Jitendra Malik

1994-01-01

441

30 CFR 56.12042 - Track bonding.  

...Resources 1 2014-07-01 2014-07-01 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...

2014-07-01

442

30 CFR 57.12042 - Track bonding.  

...Resources 1 2014-07-01 2014-07-01 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...

2014-07-01

443

Chemistry: Traditional Track BS Degree Completion Checklist  

E-print Network

Chemistry: Traditional Track BS Degree Completion Checklist Last Name____________________ First ____ CHEM 3211 ____ CHEM 3380 ____ CHEM 3411 ____ CHEM 3412 ____ CHEM 3481 ____ Traditional Track Courses: 6 of your degree petition. Traditional Options- AND CHEM 3511 OR 4511 OR 4512-3 hours (CHEM 3511 not allowed

Sherrill, David

444

Way-point tracking control of ships  

Microsoft Academic Search

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

K. Y. Pettersen; E. Lefeber

2001-01-01

445

Automated Track Inspection Information and Its Use.  

National Technical Information Service (NTIS)

The paper describes the type of track inspection information provided by the Department of Transportation test cars (railroad) and the way it is to be used. The D.O.T. track inspection car program and a computer program from which gage data is produced ar...

T. P. Woll

1970-01-01

446

Multitarget tracking with HRR wavelets features  

Microsoft Academic Search

This paper presents an algorithm for multitarget tracking using wavelets features, which effectively combines information from both high resolution range (HRR) profiles and ground moving target indication (GMTI) radar reports. With assistance of HRR wavelets features, a GMTI tracker based on a probabilistic data association logic can effectively track ground moving targets in confusing scenarios.

Lang Hong

2002-01-01

447

Two algorithms for fast approximate subspace tracking  

Microsoft Academic Search

New fast algorithms are presented for tracking singular values, singular vectors, and the dimension of a signal subspace through an overlapping sequence of data matrices. The basic algorithm is called fast approximate subspace tracking (FAST). The algorithm is derived for the special case in which the matrix is changed by deleting the oldest column, shifting the remaining columns to the

Edward C. Real; Donald W. Tufts; James W. Cooley

1999-01-01

448

Tracking prions: the neurografting approach  

Microsoft Academic Search

. The physical nature of the agent that causes transmissible spongiform encephalopathies (the 'prion'), is the subject of passionate\\u000a controversy. Investigation of it has benefited tremendously from the use of transgenic and knockout technologies. However,\\u000a prion diseases present several other enigmas, including the mechanism of brain damage and how the affinity of the agent for\\u000a the central nervous system is

A. Aguzzi; T. Blttler; M. A. Klein; A. J. Rber; I. Hegyi; R. Frigg; S. Brandner; C. Weissmann

1997-01-01

449

Efficient object tracking in WAAS data streams  

NASA Astrophysics Data System (ADS)

Wide area airborne surveillance (WAAS) systems are a new class of remote sensing imagers which have many military and civilian applications. These systems are characterized by long loiter times (extended imaging time over fixed target areas) and large footprint target areas. These characteristics complicate moving object detection and tracking due to the large image size and high number of moving objects. This research evaluates existing object detection and tracking algorithms withWAAS data and provides enhancements to the processing chain which decrease processing time and maintain or increase tracking accuracy. Decreases in processing time are needed to perform real-time or near real-time tracking either on the WAAS sensor platform or in ground station processing centers. Increased tracking accuracy benefits real-time users and forensic (off-line) users.

Clarke, Trevor R. H.; Canosa, Roxanne

2011-03-01

450

Software for Tracking Costs of Mars Projects  

NASA Technical Reports Server (NTRS)

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.

Wong, Alvin; Warfield, Keith

2003-01-01

451

Real-time wireless sensing with spatiotemporal tracking  

NASA Astrophysics Data System (ADS)

This study proposes the use of an innovative array of accelerometers for inertial tracking that is enabled through the use of a non-Cartesian hyper-coordinate frame. Traditional inertial tracking technologies employ an array of accelerometers and gyroscopes oriented in the orthogonal axes of the Cartesian coordinate system. The gyroscope sensors are responsible for deducing the relative orientation of the instrumented object, while the accelerometer measurements are double integrated to approximate the change in linear position relative to the local coordinate frame. Since the position determination is dependent on the orientation derivation, the accuracy and stability of the gyroscope sensors to a large extent determines the overall system performance. Consequently, high-performance gyroscopes are generally used in inertial tracking systems, thereby driving the system cost significantly higher. The proposed approach exclusively utilizes accelerometers in an innovative six axis orientation that, through linear algebra, resolves linear and angular accelerations. The functional layout is processed in the context of hyperdimensional coordinates which ultimately produce an inherent vector redundancy when resolved in the Cartesian coordinate frame. This revised architecture is anticipated to alleviate many of the issues plaguing traditional inertial tracking that stem from the stability of derived orientation from gyroscope readings. In addition, the exclusion of gyroscopes from the design significantly reduces the unit cost of the system. This paper additionally presents the development of a wireless system that incorporates the above described, unique array of dedicated sensors for inertial tracking to provide accurate determination of position and orientation of the sensor over time. The system permits access for additional channels of sensors for application specific monitoring tasks. This allows sensing on objects in motion and in regions or flow patterns that cannot be easily instrumented with traditional wired systems while maintaining knowledge of instantaneous position relative to the initial location. To date, the majority of wireless sensor network deployments have enabled instrumentation of widespread sites, such as civil structures, to alleviate the expense associated with the lengths of cable necessary to connect the sensors to a central acquisition station. The alternative approach sought utilizes the unrestrained nature of the wireless sensor to extend the use of this technology beyond static monitoring into applications in which the sensor node travels across an area without a priori knowledge of the sensor motion. Documentation of the hardware development of the proposed wireless sensing node as well as assessment of the system performance will be provided.

Whelan, Matthew J.; Janoyan, Kerop D.

2007-04-01

452

MoneyCentral  

NSDL National Science Digital Library

MoneyCentral is a new personal finance site by Microsoft now in public beta test. An expanded and more user-friendly form of MSN's Money Insider (discussed in the October 23, 1997 Scout Report for Business & Economics), MoneyCentral encompasses a wide variety of guides and tools on everything from Family Financing to Real Estate, Taxes and Investing. Visitors may view the full range of MoneyCentral topics from a clearly-arranged and clickable site map among other helpful links.

1999-01-01

453

Dynamic Eye Tracking Based Metrics for Infant Gaze Patterns in the Face-Distractor Competition Paradigm  

PubMed Central

Objective To develop new standardized eye tracking based measures and metrics for infants gaze dynamics in the face-distractor competition paradigm. Method Eye tracking data were collected from two samples of healthy 7-month-old (total n?=?45), as well as one sample of 5-month-old infants (n?=?22) in a paradigm with a picture of a face or a non-face pattern as a central stimulus, and a geometric shape as a lateral stimulus. The data were analyzed by using conventional measures of infants initial disengagement from the central to the lateral stimulus (i.e., saccadic reaction time and probability) and, additionally, novel measures reflecting infants gaze dynamics after the initial disengagement (i.e., cumulative allocation of attention to the central vs. peripheral stimulus). Results The results showed that the initial saccade away from the centrally presented stimulus is followed by a rapid re-engagement of attention with the central stimulus, leading to cumulative preference for the central stimulus over the lateral stimulus over time. This pattern tended to be stronger for salient facial expressions as compared to non-face patterns, was replicable across two independent samples of 7-month-old infants, and differentiated between 7 and 5 month-old infants. Conclusion The results suggest that eye tracking based assessments of infants cumulative preference for faces over time can be readily parameterized and standardized, and may provide valuable techniques for future studies examining normative developmental changes in preference for social signals. Significance Standardized measures of early developing face preferences may have potential to become surrogate biomarkers of neurocognitive and social development. PMID:24845102

Ahtola, Eero; Stjerna, Susanna; Yrttiaho, Santeri; Nelson, Charles A.; Leppanen, Jukka M.; Vanhatalo, Sampsa

2014-01-01

454

History and Future of Tracking for Mobile Phone Augmented Reality  

Microsoft Academic Search

We present an overview on the history of tracking for mobile phone augmented reality. We present popular approaches using marker tracking, natural feature tracking or offloading to nearby servers. We then outline likely future work.

Daniel Wagner; Dieter Schmalstieg

2009-01-01

455

Roles of load-induced reorganization of multi-digit physiological tremors for a tracking maneuver.  

PubMed

This study was undertaken to investigate the effect of low-level loading on digit tracking and the associated physiological tremors in the moving and the stationary digits. Sixteen healthy adults conducted positional tracking with the middle finger under the loaded and unloaded conditions; meanwhile, trajectory of the middle finger, electromyographic activities of the extensor digitorum (ED)/flexor digitorum superficialis, and physiological tremors of the index, middle, ring, and little fingers were recorded. The results showed that load imposition (<70 g) on the middle finger improved tracking congruency, in association with reduction of inter-digit tremor coupling and enhancement of tiny movement jerks. Principal component analysis suggested that inertial load suppressed the 8-12 Hz central rhythm but potentiated the 25-40 Hz coherence spectra of major principal components and electromyographic signals of the ED. It was concluded that low-level inertial load could facilitate corrective movement adjustments and selective digit control during manual tracking, relevant implicitly to decreased common central drive and enhanced heteronymous reflex loops. PMID:20842373

Hwang, Ing-Shiou

2011-02-01

456

Central serous choroidopathy  

MedlinePLUS

... studies found that people with aggressive, "type A" personalities who are under a lot of stress may be more likely to develop central serous retinopathy. The condition can also occur as a complication of steroid drug use.

457

Exploring Central Tendency  

NSDL National Science Digital Library

This lesson is designed for 6th grade students. Student will work in small groups to apply central tendency to a real world scenario to finally answer the age old question of "when will I ever use this."

Friske, Monica

2012-08-14

458

The Computational Complexity of RaceTrack  

NASA Astrophysics Data System (ADS)

Martin Gardner in the early 1970's described the game of RaceTrack [M. Gardner, Mathematical games - Sim, Chomp and Race Track: new games for the intellect (and not for Lady Luck), Scientific American, 228(1):108-115, Jan. 1973]. Here we study the complexity of deciding whether a RaceTrack player has a winning strategy. We first prove that the complexity of RaceTrack reachability, i.e., whether the finish line can be reached or not, crucially depends on whether the car can touch the edge of the carriageway (racetrack): the non-touching variant is NL-complete while the touching variant is equivalent to the undirected grid graph reachability problem, a problem in L but not known to be L-hard. Then we show that single-player RaceTrack is NL-complete, regardless of whether driving on the track boundary is allowed or not, and that deciding the existence of a winning strategy in Gardner's original two-player game is P-complete. Hence RaceTrack is an example of a game that is interesting to play despite the fact that deciding the existence of a winning strategy is most likely not NP-hard.

Holzer, Markus; McKenzie, Pierre

459

Simultaneous tracking and recognition performance model  

NASA Astrophysics Data System (ADS)

High value target tracking and identification (ID) performance is impacted by sensor, target, and environmental conditions. Radar sensors are preferred since they provide sensor capabilities over a wide range of weather conditions. Sensor management provides some control, such as adjustment of the collection geometry. However, ground target dynamics and the collection environment can't be controlled and degrade tracking and identification performance. Some examples are when the target maneuvers into dense traffic, stops at intersections, or travels in a cluttered environment and is obscured by vegetation or buildings. Target identification algorithms using high range resolution (HRR) profiles formed from moving target data and range profiles formed from synthetic aperture radar (SAR) data have been demonstrated. Feature aided tracking (FAT) exploits the features derived from HRR data to improve target tracking. Identifying the dominant features which can be reliably exploited when a target is either moving or stationary that can then be used to maintain track and ID the target is expected to enhance algorithm performance in realistic scenarios. A simultaneous tracking and recognition (STAR) performance model is developed and applied to realistic scenarios to provide performance gain estimates based on the number of exploited features and operating conditions. This paper presents performance results for simultaneous target tracking and identification using HRR and SAR sensor data.

Kahler, Bart

2012-05-01

460

Central core disease  

Microsoft Academic Search

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;

Heinz Jungbluth

2007-01-01

461

CDF Central Outer Tracker  

NASA Astrophysics Data System (ADS)

The Central Outer Tracker is a large cylindrical drift chamber constructed to replace Collider Detector at Fermilab's original central drift chamber for the higher luminosity expected for Run 2 at the Fermilab Tevatron. The chamber's drift properties are described in the context of meeting the operating requirements for Run 2. The design and construction of the chamber, the front-end readout electronics, and the high-voltage system are described in detail. Wire aging considerations are also discussed.

Affolder, T.; Allspach, D.; Ambrose, D.; Bialek, J.; Bokhari, W.; Brozovic, M.; Binkley, M.; Burkett, K.; Byon-Wagner, A.; Cogswell, F.; Dressnandt, N.; Feng, Z.; Franklin, M.; Galtieri, L.; Gerdes, D. W.; Greenwood, J.; Guarino, V.; Guimaraes da Costa, J.; Haggerty, R.; Hall, C.; Heinrich, J.; Holloway, A.; Jacobi, T.; Kephart, K.; Khazins, D.; Kim, Y. K.; Kirby, M.; Kononenko, W.; Kotwal, A. V.; Kraus, J.; Liss, T. M.; Lockyer, N.; Madrak, R.; Miao, T.; Mukherjee, A.; Neu, C.; Newcomer, M.; Niczyporuk, J. M.; Nodulman, L.; Orejudous, W.; Phillips, T. J.; Pitts, K. T.; Reigler, W.; Richards, R.; Rivetta, C.; Robertson, W. J.; Roser, R.; Sadler, L.; Sandberg, R.; Sansone, S.; Schmitt, R.; Schultz, K.; Shuman, D.; Silva, R.; Singh, P.; Snihur, R.; Tamburello, P.; Taylor, J.; Thurman-Keup, R.; Tousignant, D.; Ukegawa, F.; Van Berg, R.; Veramendi, G.; Vickey, T.; Wacker, J.; Wagner, R. L.; Weidenbach, R.; Wester, W. C.; Williams, H. H.; Wilson, P.; Wittich, P.; Yagil, A.; Yu, I.; Yu, S.; Yun, J. C.

2004-07-01

462

Optical multiple object tracking techniques  

NASA Technical Reports Server (NTRS)

Two multichannel multiple-object tracking techniques are reviewed. In the diffraction grating technique, the input scene is picked up by a TV camera and imaged onto a liquid-crystal light valve (LCLV), and the output side of the light valve is illuminated with a suitably polarized and collimated coherent laser beam to yield a reflected beam with polarization modulated according to the intensity of the incoherent input. This reflected beam passes through a beam splitter cube and an analyzer, resulting in an intensity modulated coherent image. An array of spectrum islands containing the information of the input appears after crossing a contact screen/lens combination. In the multiple-focus hololens technique, the scene of moving objects is sent into the LCTVSLM through a camera; a collimated laser beam is incident upon the LCTV screen; a low-pass filter is inserted between the LCTVSLM and the hololens for the removal of the high order diffractions due to the grid structure of the LCTV. The feasibility of the LCTVSLM and multiple-focus hololens technique is demonstrated.

Liu, Hua-Kuang; Chao, Tien-Hsin

1989-01-01

463

Tracking f(R) cosmology  

SciTech Connect

Metric f(R) gravity theories are conformally equivalent to models of quintessence in which matter is coupled to dark energy. We derive a condition for a stable tracker solution for metric f(R) gravity in the Einstein frame. We find that tracker solutions with -0.361<{omega}{sub {phi}}<1 exist if 0<{gamma}<0.217 and (d/dt)lnf{sup '}(R-tilde)>0, where {gamma}=(V{sub {phi}}{sub {phi}}V/V{sub {phi}}{sup 2}) is a dimensionless function, {omega}{sub {phi}} is the equation of state parameter of the scalar field, and R-tilde refers to the Jordan frame's curvature scalar. Also, we show that there exists f(R-tilde) gravity models which have tracking behavior in the Einstein frame and so the curvature of space-time is decreasing with time while they lead to the solutions in the Jordan frame that the curvature of space-time can be increasing with time.

Roshan, Mahmood; Shojai, Fatimah [Department of Physics, University of Tehran, 143995-5961, Tehran (Iran, Islamic Republic of)

2009-05-15

464

Animal Tracking ARGOS vs GPS  

NASA Astrophysics Data System (ADS)

ARGOS satellite tracking technology has enabled a tremendous increase in our understanding of the movement patterns of a diverse array of marine vertebrates from Sharks to marine mammals. Our current understanding has moved from simple descriptions of large scale migratory patterns to much more sophisticated comparisons of animal movements and behavior relative to oceanic features. Further, animals are increasingly used to carry sensors that can acquire water column temperature and salinity profiles. However, a major limitation of this work is the spatial precision of ARGOS locations. ARGOS provides 7 location qualities that range from 3,2,1,0,A,B,Z and correspond to locations with a precision of 150m to tens of kilometers. Until recently, GPS technology could not be effectively used with marine mammals because they did not spend sufficient time at the surface to allow complete acquisition of satellite information. The recent development of Fastloc technology has allowed the development of GPS tags that can be deployed on marine mammals. Here we compare the location quality and frequency derived from standard ARGOS PTTs to Fastloc GPS locations acquired from 11 northern elephant seals, 5 California and 5 Galapagos sea lions and 1 Cape and 3 Australian fur seals. Our results indicate that GPS technology will greatly enhance our ability to understand the movement patterns of marine vertebrates and the in-situ oceanographic data they collect.

Robinson, P. W.; Costa, D.; Arnould, J.; Weise, M.; Kuhn, C.; Simmons, S. E.; Villegas, S.; Tremblay, Y.

2006-12-01

465

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

Microsoft Academic Search

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

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

2010-01-01

466

C-kNN Query Processing in Object Tracking Sensor Networks  

Microsoft Academic Search

Wireless sensor networks (WSNs) are being developed for a variety of applications. Continuous k nearest neighbors (C-kNN)\\u000a query is an essential class of spatial query in object tracking applications. Due to the limited power of individual node,\\u000a energy is the most critical resource in sensor networks. In order to always report the up-to-date results, a centralized solution\\u000a requires the transmission

Jinghua Zhu; Jianzhong Li; Jizhou Luo; Wei Zhang; Hongzhi Wang

2008-01-01

467

Temporal node centrality in complex networks  

NASA Astrophysics Data System (ADS)

Many networks are dynamic in that their topology changes rapidlyon the same time scale as the communications of interest between network nodes. Examples are the human contact networks involved in the transmission of disease, ad hoc radio networks between moving vehicles, and the transactions between principals in a market. While we have good models of static networks, so far these have been lacking for the dynamic case. In this paper we present a simple but powerful model, the time-ordered graph, which reduces a dynamic network to a static network with directed flows. This enables us to extend network properties such as vertex degree, closeness, and betweenness centrality metrics in a very natural way to the dynamic case. We then demonstrate how our model applies to a number of interesting edge cases, such as where the network connectivity depends on a small number of highly mobile vertices or edges, and show that our centrality definition allows us to track the evolution of connectivity. Finally we apply our model and techniques to two real-world dynamic graphs of human contact networks and then discuss the implication of temporal centrality metrics in the real world.

Kim, Hyoungshick; Anderson, Ross

2012-02-01

468

Temporal node centrality in complex networks.  

PubMed

Many networks are dynamic in that their topology changes rapidly--on the same time scale as the communications of interest between network nodes. Examples are the human contact networks involved in the transmission of disease, ad hoc radio networks between moving vehicles, and the transactions between principals in a market. While we have good models of static networks, so far these have been lacking for the dynamic case. In this paper we present a simple but powerful model, the time-ordered graph, which reduces a dynamic network to a static network with directed flows. This enables us to extend network properties such as vertex degree, closeness, and betweenness centrality metrics in a very natural way to the dynamic case. We then demonstrate how our model applies to a number of interesting edge cases, such as where the network connectivity depends on a small number of highly mobile vertices or edges, and show that our centrality definition allows us to track the evolution of connectivity. Finally we apply our model and techniques to two real-world dynamic graphs of human contact networks and then discuss the implication of temporal centrality metrics in the real world. PMID:22463279

Kim, Hyoungshick; Anderson, Ross

2012-02-01

469

STS-30 deorbit and reentry ground track  

NASA Technical Reports Server (NTRS)

Rockwell International (RI) supplied artist concept titled 'STS-30 Deorbit and Reentry Track' shows Atlantis, Orbiter Vehicle (OV) 104, deorbit and reentry ground track. Ground track and map portray OV-104's deorbit over Madagascar, atmospheric reentry maneuvers, approach to the California coast, and landing at Edwards Air Force Base (EAFB), California. the transport trailer of the Payload Environmental Transportation System (PETS). Magellan, destined for unprecedented studies of Venusian topographic features, will be deployed by the crew of NASA's STS-30 mission in April 1989. View provided by KSC with alternate number KSC-88PC-1086.

1989-01-01

470

Advanced Alignment of the ATLAS Tracking System  

E-print Network

In order to reconstruct the trajectories of charged particles, the ATLAS experiment exploits a tracking system built using different technologies, planar silicon modules or microstrips (PIX and SCT detectors) and gaseous drift tubes (TRT), all embedded in a 2T solenoidal magnetic field. Misalignments and deformations of the active detector elements deteriorate the track reconstruction resolution and lead to systematic biases on the measured track parameters. The alignment procedures exploits various advanced tools and techniques in order to determine for module positions and correct for deformations. For the LHC Run II, the system is being upgraded with the installation of a new pixel layer, the Insertable B-layer (IBL).

Butti, P; The ATLAS collaboration

2014-01-01