These are representative sample records from Science.gov related to your search topic.
For comprehensive and current results, perform a real-time search at Science.gov.
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

The DO Central Track Trigger  

E-print Network

An overview of the system architecture and algorithms used for the DO Central Track Trigger (CTT) in the Run 2 of the Fermilab Tevatron Proton-Antiproton Collider is presented. This system uses information from the newly commissioned Central Fiber...

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

2004-06-01

3

Report of the Central Tracking Group  

SciTech Connect

Issues involved in building a realistic central tracking system for a general-purpose 4..pi.. detector for the SSC are addressed. Such a central tracking system must be capable of running at the full design luminosity of 10/sup 33/ cm/sup -2/s/sup -1/. Momentum measurement was required in a general-purpose 4..pi.. detector. Limitations on charged particle tracking detectors at the SSC imposed by rates and radiation damage are reviewed. Cell occupancy is the dominant constraint, which led us to the conclusion that only small cells, either wires or straw tubes, are suitable for a central tracking system at the SSC. Mechanical problems involved in building a central tracking system of either wires or straw tubes were studied, and our conclusion was that it is possible to build such a large central tracking system. Of course, a great deal of research and development is required. We also considered central tracking systems made of scintillating fibers or silicon microstrips, but our conclusion was that neither is a realistic candidate given the current state of technology. We began to work on computer simulation of a realistic central tracking system. Events from interesting physics processes at the SSC will be complex and will be further complicated by hits from out-of-time bunch crossings and multiple interactions within the same bunch crossing. Detailed computer simulations are needed to demonstrate that the pattern recognition and tracking problems can be solved.

Cassel, D.G.; Hanson, G.G.

1986-10-01

4

D0 central tracking chamber performance studies  

SciTech Connect

The performance of the completed DO central tracking chamber was studied using cosmic rays at the State University of New York at Stony Brook. Also studied was a prototype tracking chamber identical in design to the completed DO tracking chamber. The prototype chamber was exposed to a collimated beam of 150 GeV pions at the Fermilab NWA test facility. Results indicate an R{Phi} tracking resolution compatible with the limitations imposed by physical considerations, excellent 2 track resolution, and a high track reconstruction efficiency along with a good rejection power against {gamma} {yields} e {sup +} e{sup {minus}} events.

Pizzuto, D.

1991-12-01

5

Fission track dating obsidians in Central and Northern Anatolia  

Microsoft Academic Search

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

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

1993-01-01

6

Combined H1-ZEUS S Thomas Kluge  

E-print Network

Combined H1-ZEUS S fit Thomas Kluge for the H1 and ZEUS Collaborations DIS 2008, University College London 7-11 April 2008 #12;DIS08 7-11 April T.Kluge, Combined H1-ZEUS... Motivation strong coupling from HERA now: combined H1/ZEUS fit of one observable: inclusive jet cross section #12;DIS08 7

7

A central neural pathway controlling odor tracking in Drosophila.  

PubMed

Chemotaxis is important for the survival of most animals. How the brain translates sensory input into motor output beyond higher olfactory processing centers is largely unknown. We describe a group of excitatory neurons, termed Odd neurons, which are important for Drosophila larval chemotaxis. Odd neurons receive synaptic input from projection neurons in the calyx of the mushroom body and project axons to the central brain. Functional imaging shows that some of the Odd neurons respond to odor. Larvae in which Odd neurons are silenced are less efficient at odor tracking than controls and sample the odor space more frequently. Larvae in which the excitability of Odd neurons is increased are better at odor intensity discrimination and odor tracking. Thus, the Odd neurons represent a distinct pathway that regulates the sensitivity of the olfactory system to odor concentrations, demonstrating that efficient chemotaxis depends on processing of odor strength downstream of higher olfactory centers. PMID:25653345

Slater, Gemma; Levy, Peter; Chan, K L Andrew; Larsen, Camilla

2015-02-01

8

Luminosity Measurement in the ZEUS Experiment  

Microsoft Academic Search

A precision luminosity measurement in the ZEUS experiment at the HERA electron--proton collider is described, based on the data collected by the ZEUS luminosity monitor in 1996. The method of the measurement relies on the detection of high-energy photons from the ep bremsstrahlung process. The large cross section of this process allows for the continuous and fast monitoring of the

J. Andruszkow; P. Borzemski; J. Chwastowski; W. Daniluk; A. Eskreys; P. Jurkiewicz; A. Kotarba; K. Oliwa; K. Olkiewicz; M. B. Przybycien; W. Wierba; M. Zachara; L. Zawiejski; L. Adamczyk; D. Kisielewska; L. Suszycki

2001-01-01

9

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 of this central service, Human Resources will not serve as the office of record for licensure and certification

Squire, Larry R.

10

FAST TRACK COMMUNICATION: Semiclassical central charge in topologically massive gravity  

Microsoft Academic Search

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

Geoffrey Compère; Stéphane Detournay

2009-01-01

11

The central track trigger of the DO experiment  

Microsoft Academic Search

The general purpose DO collider detector, located at Fermi National Accelerator Laboratory, is operated in the high luminosity (L=2×1032 cm-2·s-1) and high-collision-rate environment (396 ns between beam crossings) of the upgraded Tevatron proton anti-proton accelerator. DO uses a three-tiered trigger system to select events for offline storage and analysis. This paper describes the architecture and performance of the DO central

Yuan Hu; John Anderson; Robert Angstadt; Levan Babukhadia; Mrinmoy Bhattacharjee; Gerald Blazey; Fred Borcherding; Brian Connolly; Michael Cooke; Satish Desai; David Evans; Paul Grannis; Stefan Grünendahl; Carsten Hensel; Vivek Jain; Marvin Johnson; Miroslav Kopal; Stephan Linn; Juan Lizarazo; Yurii Maravin; Manuel Martin; Yildirim Mutaf; Carsten Nöding; Jamieson Olsen; Ricardo Ramirez-Gomez; Stefano Rapisarda; Kyle Stevenson; Makoto Tomoto; Brigitte Vachon; Thei Wijnen; Neal Wilcer; Graham Wilson; Qichun Xu; Kin Yip

2004-01-01

12

Terrestrial Analogs to Mars: East-Central Saharan Dust Devil Tracks  

NASA Astrophysics Data System (ADS)

Seen abundantly on Mars, dust devil tracks are rare features on Earth due to the active surface processes. Using the publicly available images from Google Earth, we describe four sites in the east-central Saharan Desert (Libya, Chad, and Egypt).

Neakrase, L. D. V.; McHone, J.; Whelley, P. L.; Greeley, R.

2012-03-01

13

A Centralized Control Algorithm for Target Tracking Pengcheng Zhan, David W. Casbeer, A. Lee Swindlehurst  

E-print Network

a basestation, either airborne or on the ground, illuminates the target with a radar signal, and the UAVs As mentioned above, we consider a multistatic radar prob- lem in which a set of N UAVs receives the signalA Centralized Control Algorithm for Target Tracking with UAVs Pengcheng Zhan, David W. Casbeer, A

Swindlehurst, A. Lee

14

First level trigger of the backing calorimeter for the ZEUS experiment  

Microsoft Academic Search

First Level Trigger (FLT) of the Backing Calorimeter (BAC) for the ZEUS experiment is presented. The Backing Calorimeter was designed to measure the energy of particles which are not absorbed in Central Uranium Calorimeter and to identify muons. Its trigger system calculates the total energy (E), transverse energy (Et), two highest energy deposits measured in the detector (E1,E2) and provides

Krzysztof T. Pozniak; Pawel Plucinski; Grzegorz Grzelak; Krzysztof Kierzkowski; Maciej I. Kudla

2004-01-01

15

Luminosity Measurement in the ZEUS Experiment  

NASA Astrophysics Data System (ADS)

A precision luminosity measurement in the ZEUS experiment at the HERA electron--proton collider is described, based on the data collected by the ZEUS luminosity monitor in 1996. The method of the measurement relies on the detection of high-energy photons from the ep bremsstrahlung process. The large cross section of this process allows for the continuous and fast monitoring of the HERA luminosity as well as for the control of the electron beam steering and focusing. A 1% precision of the luminosity determination has been achieved. The luminosity monitor has been also extensively used for studying quasi-real photoproduction, and radiative processes in deep inelastic scattering.

Andruszkow, J.; Borzemski, P.; Chwastowski, J.; Daniluk, W.; Eskreys, A.; Jurkiewicz, P.; Kotarba, A.; Oliwa, K.; Olkiewicz, K.; Przybycien, M. B.; Wierba, W.; Zachara, M.; Zawiejski, L.; Adamczyk, L.; Kisielewska, D.; Przybycien, M.; Suszycki, L.

2001-07-01

16

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

NASA Astrophysics Data System (ADS)

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

Abbassi, Nasrollah; Madanipour, Saeed

2014-04-01

17

ON THE RELIABILITY OF ZEUS-3D  

SciTech Connect

Recent and not-so-recent critiques of the widely used magnetohydrodynamics (MHD) code, ZEUS-3D, challenge its reliability and efficiency suggesting that its MHD algorithm is capable of 'significant errors' in some simple one-dimensional shock-tube problems. I show that these concerns are either inapplicable in multi-dimensional astrophysical applications, or result from a misuse of the code rather than 'flaws' in its design. I also describe a few multi-dimensional test problems including one for super-Alfvenic turbulence, and highlight some recent innovations and improvements to the code now available online.

Clarke, David A. [Institute for Computational Astrophysics, Department of Astronomy and Physics, Saint Mary's University, Halifax, Nova Scotia B3H 3C3 (Canada)], E-mail: dclarke@ap.smu.ca

2010-03-01

18

Overview of the backing calorimeter after the ZEUS detector upgrade  

Microsoft Academic Search

New hardware and software developments on the Backing Calorimeter (BAC) for the ZEUS detector are presented. The modernization of the detector was related to the recent luminosity upgrade of the HERA accelerator. The role and place of the BAC detector in the ZEUS experiment is described with special emphasis on the new BAC muon trigger and its diagnostic and monitoring

Tomasz Jezynski; Zbigniew Luszczak; Krzysztof T. Pozniak; Pawel Plucinski; Grzegorz Grzelak; Krzysztof Kierzkowski; Maciej I. Kudla; Michal Pietrusinski

2004-01-01

19

A Tool for Programming AVR Microcontroller Networks the Zeus Programmer  

E-print Network

A Tool for Programming AVR Microcontroller Networks #21; the #19;Zeus#20;Programmer Wolfgang for downloading the binary code to the Flash and EEPROM memory for some Embedded MCUs of the Atmel AVR family. In contrast to other download tools used for the Atmel AVR family the #19;Zeus#20;Programmer allows

20

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

21

Calorimetry in ZEUS: Lessons for the future  

SciTech Connect

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

Derrick, M.

1988-01-01

22

Apatite fission track analysis of the Pacoota and Stairway Sandstones, Amadeus Basin, central Australia  

NASA Astrophysics Data System (ADS)

Apatite fission track analysis of outcrop samples from the Cambrian-Ordovician Pacoota and Stairway Sandstones from the Amadeus Basin show that all samples have experienced higher temperatures in the past. The youngest apatite fission track ages of around 200 Ma are found along the northern margin of the basin and along the trend of the Johnny Creek Anticline and Watson Range. These younger ages reflect total or near total annealing of tracks due to burial associated with the Alice Springs Orogeny. Outcrop samples with older fission track ages (250 to 650 Ma) elsewhere in the basin are consistent with partial overprinting by maximum palaeotemperatures of between 70 and 110 C. Confined track length data from these samples suggest that a protracted cooling due to uplift and erosion has occurred since the Alice Springs Orogeny. Totally reset apatite fission track ages occur at depths between 1 and 2 km in the Alice 1, Wallaby 1 and East Mereenie 2 wells. The geothermal gradients at the time of maximum palaeotemperature appear similar to those of the present day suggesting that thermal maturation of oil source rocks in the basin was due to heating associated with burial rather than increased heat flow during the Alice Springs Orogeny. The geological setting and thermal history of the basin is consistent with subsidence at the time of the Alice Springs Orogeny as the result of foreland loading.

Tingate, P. R.

23

Exclusive Meson Production at HERA The ZEUS Collaboration  

E-print Network

Exclusive Meson Production at HERA The ZEUS Collaboration The scattering process electron+proton electron+proton+ meson, followed by the decay K+K-, is simple and experimentally clean, and yet contains process, and the meson is produced from the vacuum. Exactly how this comes about is not known, but we

24

Spectroscopic Measurements Using the H1 and ZEUS Detectors  

E-print Network

Results on spectroscopy from the H1 and ZEUS collaborations are presented. The main focus is to search for baryon states which could be interpreted as pentaquarks. This includes states decaying to K^0_sp and K^0_s\\bar{p}, \\Xi\\pi and D*p. In addition an analysis of K^0_sK^0_s resonances is covered.

Sebastian Schmidt

2005-06-08

25

Diffusion tensor fiber tracking in patients with central post-stroke pain; correlation with efficacy of repetitive transcranial magnetic stimulation.  

PubMed

Central post-stroke pain (CPSP) is one of the most common types of intractable pain. We reported that repetitive transcranial magnetic stimulation (rTMS) of primary motor cortex relieves pain for patients who were refractory to medical treatment. But the mechanism is unclear. In the present study, we investigated relations between the characteristics of CPSP and the results of fiber tracking, which is the only noninvasive method of evaluating the anatomical connectivity of white matter pathways. Fiber tracking of the corticospinal tract (CST) and thalamocortical tract (TCT) was investigated in 17 patients with CPSP. The stroke lesion was located in a supratentorial region in all cases (corona radiata, one case; thalamus, seven cases; putamen, nine cases). Relations between the delineation ratio (defined as the ratio of the cross section of the affected side to that of the unaffected side) of the CST and of the TCT, manual muscle test score, pain score, region of pain, and efficacy of rTMS were evaluated. Fiber tracking was successful in 13 patients with the stroke lesion involving the TCT. The rTMS-effective group had higher delineation ratio of the CST (p=0.02) and the TCT (p=0.005) than the rTMS-ineffective group. Previous studies suggested that an intact CST allows pain control but did not discuss the TCT. Our results suggest that the TCT also plays a role in pain reduction by rTMS of the primary motor cortex and that the efficacy of rTMS for patients with CPSP is predictable by fiber tracking. PMID:19004554

Goto, Tetsu; Saitoh, Youichi; Hashimoto, Naoya; Hirata, Masayuki; Kishima, Haruhiko; Oshino, Satoru; Tani, Naoki; Hosomi, Koichi; Kakigi, Ryusuke; Yoshimine, Toshiki

2008-12-01

26

SCECO central load management system - fast-track demand limiting design and implementation  

SciTech Connect

There are four major regional power companies in Saudi Arabia, all units of Saudi Consolidated Electric Company (SCECO), located in east, central, south and west provinces. The Electricity Corporation (EC), an agency of the Ministry of Industry and Electricity, holds oversight powers over all the generating companies. SCECO Central, headquartered in Riyadh, currently generates 3,810 MW, imports up to 1,800 MW from SCECO East, and serves approximately 5,600 MW during system peak. SCECO Central has recently experienced rapid load growth averaging approximately 12 percent annually. In 1993, SCECO Central load growth reached 17 percent. New building construction in Riyadh continues at a rapid pace. Load growth for the foreseeable future is forecast to decline from 7.5 percent in 1994 to 4.7 percent in 2000. In 1995, the projected peak of SCECO Central minus planned generation and interchange will result in a deficit unless corrective measures are taken. Various supply side and demand side management (DSM) measures will be needed to prevent this deficit. Several measures are currently being investigated and implemented by SCECO Central. SCECO Central has chosen to implement a load management system (LMS) that will provide system operators the ability to reduce system loading during critical periods using direct control techniques available from the LMS and associated control systems. In January 1994, Black & Veatch International. Kansas City, Missouri, entered into a contract with SCECO Central to provide design, procurement, and construction supervision services for the implementation of a new load management system (LMS). The LMS project schedule is very aggressive. LMS bid documents were scheduled for released during July, 1994; contract award was in October, 1994; and installation completion is scheduled by May, 1995.

Bird, J.R.; Kutscher, T.A.

1995-12-31

27

Relative potentials of concentrating and two-axis tracking flat-plate photovoltaic arrays for central-station applications  

NASA Technical Reports Server (NTRS)

The purpose of this study is to assess the relative economic potentials of concenrating and two-axis tracking flat-plate photovoltaic arrays for central-station applications in the mid-1990's. Specific objectives of this study are to provide information on concentrator photovoltaic collector probabilistic price and efficiency levels to illustrate critical areas of R&D for concentrator cells and collectors, and to compare concentrator and flat-plate PV price and efficiency alternatives for several locations, based on their implied costs of energy. To deal with the uncertainties surrounding research and development activities in general, a probabilistic assessment of commercially achievable concentrator photovoltaic collector efficiencies and prices (at the factory loading dock) is performed. The results of this projection of concentrator photovoltaic technology are then compared with a previous flat-plate module price analysis (performed early in 1983). To focus this analysis on specific collector alternatives and their implied energy costs for different locations, similar two-axis tracking designs are assumed for both concentrator and flat-plate options.

Borden, C. S.; Schwartz, D. L.

1984-01-01

28

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

SciTech Connect

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

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

1987-12-01

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

I. Bloch, DESY/Hamburg University -Moriond QCD 12.-19.03.'05 1Beauty at H1 and ZEUS Studies of Beauty at H1 and ZEUSStudies of Beauty at H1 and ZEUS  

E-print Network

I. Bloch, DESY/Hamburg University - Moriond QCD 12.-19.03.'05 1Beauty at H1 and ZEUS Studies of Beauty at H1 and ZEUSStudies of Beauty at H1 and ZEUS I. Bloch, DESY Hamburg / Hamburg University XXXXth & Outlook #12;I. Bloch, DESY/Hamburg University - Moriond QCD 12.-19.03.'05 2Beauty at H1 and ZEUS H1&ZEUS

31

Diffraction at HERA M. Kapishin (on behalf of the H1 and ZEUS Collaborations)  

E-print Network

Diffraction at HERA M. Kapishin (on behalf of the H1 and ZEUS Collaborations) JINR, Joliot Curie 6 diffractive cross section and diffrac­ tive dijet production in deep­inelastic scattering, obtained by the H1 and ZEUS ex­ periments at HERA, are presented. The latest results on the exclusive diffractive production

32

Using satellite tracking to optimize protection of long-lived marine species: olive ridley sea turtle conservation in Central Africa.  

PubMed

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 of olive ridley sea turtles (Lepidochelys olivacea) (n?=?18) in Central Africa during two breeding seasons (2007-08, 2008-09). These movements were analyzed in relation to current park boundaries and a proposed transboundary park between Gabon and the Republic of Congo, both created to reduce unintentional bycatch of sea turtles in marine fisheries. We additionally determined confidence intervals surrounding home range calculations. Turtles remained largely within a 30 km radius from the original nesting site before departing for distant foraging grounds. Only 44.6 percent of high-density areas were found within the current park but the proposed transboundary park would incorporate 97.6 percent of high-density areas. Though tagged individuals originated in Gabon, turtles were found in Congolese waters during greater than half of the internesting period (53.7 percent), highlighting the need for international cooperation and offering scientific support for a proposed transboundary park. This is the first comprehensive study on the internesting movements of solitary nesting olive ridley sea turtles, and it suggests the opportunity for tractable conservation measures for female nesting olive ridleys at this and other solitary nesting sites around the world. We draw from our results a framework for cost-effective protection of long-lived species using satellite telemetry as a primary tool. PMID:21589942

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

2011-01-01

33

Reconstructing the syn-to-post tectonic exhumation history of the south-central Pyrenees with apatite fission track thermochronology  

NASA Astrophysics Data System (ADS)

The topographic development of orogens is driven by deformation and erosion processes. Numerical and analogue models suggest these processes interact, causing the geometry of the orogen (taper) to adjust in response to continued crustal shortening and erosion. After mountain building ceases, erosion can continue to alter the landscape through changes in climate, base level, or drainage patterns. We examine the relationship between syn- and post-tectonic erosion along four N-S transects of the south Pyrenean flank by quantifying exhumation with low-temperature thermochronology. Previous thermochronometer studies in the Pyrenees have been mostly limited to the range center (Axial Zone), whereas we focus on the southern fold-thrust belt, and compare our results with the extensive, regional magnetostratigraphic record of deformation and sedimentation. We analyzed and applied inverse thermal modeling techniques to eighteen apatite fission track samples from sedimentary and metamorphic bedrock of the central-eastern Spanish Pyrenees. Our analysis shows that the samples record exhumation (1) associated with the source region and/or (2) post-dating deposition. For example, the Sierras Marginales thrust sheet and Graus Tremp Basin have an exhumation signal from the Axial Zone, indicating minor post-tectonic erosion (< a few kilometers). On the other hand, the Freser antiformal stack and Nogueres Zone indicate syn- and/or post-tectonic erosion exceeding ~4 km. In general, exhumation on the northern portions of all transects near or within the Axial Zone occurred 50-20 Ma, consistent with existing constraints on the timing of deformation and exhumation. Exhumation of some of the more southern structures, such as the Oliana anticline and Montsec thrust sheet, occurred 20-10 Ma, which post-dates known phases of deformation recorded by cross-cutting stratigraphic relationships. This rapid erosion is either (a) related to a previously unidentified late Miocene phase of orogenic activity, or (b) a post-tectonic response to external forcing, such as base level lowering following the capture of the Ebro Basin by the Mediterranean. We prefer the latter explanation due to the numerous stratigraphic constraints on the deformation of these structures. We conclude that in the Pyrenees and other inactive orogens, thermochronologically-recorded rapid exhumation may result from syn- and/or post-tectonic erosion. This complexity underscores both the necessity for interdisciplinary methodologies to quantify their relative contributions and highlights the complimentary use of low-temperature thermochronology and magnetostratigraphy in reconstructing mountain denudation histories.

Rushlow, C. R.; Barnes, J. B.

2011-12-01

34

First-level trigger processor for the ZEUS calorimeter  

SciTech Connect

The design of the first-level trigger processor for the Zeus calorimeter is discussed. This processor accepts data from the 13,000 photomultipliers of the calorimeter, which is topologically divided into 16 regions, and after regional preprocessing performs logical and numerical operations that cross regional boundaries. Because the crossing period at the HERA collider is 96 ns, it is necessary that first-level trigger decisions be made in pipelined hardware. One microsecond is allowed for the processor to perform the required logical and numerical operations, during which time the data from ten crossings would be resident in the processor while being clocked through the pipelined hardware. The circuitry is implemented in 100K emitter-coupled logic (ECL), advanced CMOS discrete devices and programmable gate arrays, and operates in a VME environment. All tables and registers are written/read from VME, and all diagnostic codes are executed from VME. Preprocessed data flows into the processor at a rate of 5.2 Gbyte/s, and processed data flows from the processor to the global first-level trigger at a rate of 70 Mbyte/s. The system allows for subsets of the logic to be configured by software and for various important variables to be histogrammed as they flow through the processor.

Dawson, J.W.; Talaga, R.L.; Burr, G.W.; Laird, R.J. (Argonne National Lab., Argonne, IL (US)); Smith, W.; Lackey, J. (Univ. of Wisconsin, Dept. of Physics, Madison, WI (US))

1990-12-01

35

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

36

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

37

Fission track thermochronology in South-Central Chile (37°S-42°S): implications for mass transfer and denudation along an active continental margin  

NASA Astrophysics Data System (ADS)

Seismicity, faulting and uplift point to active deformational processes along the South-Central Chilean continental margin and make this area a natural laboratory for investigations of long-term mass transfer patterns at convergent margins. Understanding the factors controlling the tectonic behaviour of the continental margin has some general implications for continental growth and the mass transfer processes in "subduction factories". In order to identify and quantify mass transfer processes we applied apatite and zircon fission track thermochronology along two N-S oriented, trench-parallel sections. The western profile is located within the Permo-Triassic accretionary complex of the Coastal Cordillera and provides information about the timing and magnitude of forearc uplift and/or subsidence. The eastern profile runs through the Main Cordillera and aims towards quantifying the denudation history and understanding the mechanisms of exhumation within the magmatic arc. Early Cretaceous to Early Tertiary fission track ages of the metamorphic and granitoid rocks of the Coastal Cordillera indicate that exhumation of less than 4 km occurred since about the Early Cretaceous. The exhumation rates were variable with time: while geomorphology and sedimentary cover on the basement rocks indicate uplift of several 100m during Pliocene and Quaternary, sedimentary basins suggest subsidence during Miocene times. Therefore, most of the recorded exhumation must be Early Cretaceous to Paleogene in age. The slow and discontinuous exhumation suggests that processes leading to vertical displacements, like basal underplating or tectonic erosion, were not active to any major extent here. In the Main Cordillera, apatite fission track ages at the southern end of the profile (40°S) range from Late Miocene to Late Pliocene, revealing that exhumation there is recent and rapid, with rates of nearly 1 km/Ma during the last 4 Ma. Fission track ages tend to get older along the profile until Eocene fission track ages at the northern end of the profile (38°S) indicate that exhumation there was more than an order of magnitude less efficient. Although variations of the geothermal gradient and tectonics may have influenced the age distribution pattern, climate seems to be an important factor. Younger ages towards the south correlate with drastic increases of precipitation rates and intensity of Pleistocene glaciation.

Gräfe, K.; Glodny, J.; Seifert, W.; Rosenau, M.; Echtler, H.

2003-04-01

38

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

NASA Astrophysics Data System (ADS)

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

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

2012-12-01

39

A Response to Zeus Leonardo's "Critical Empiricism: Reading Data with Social Theory"  

ERIC Educational Resources Information Center

In this article the author briefly brings up two related conceptual and political areas that Zeus Leonardo and the author might want to discuss further. These concern the status of the language of "resistance" and "agency," terms that play a large part in Leonardo's essay and that are now among the pantheon of accepted political and analytic…

Apple, Michael W.

2010-01-01

40

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

41

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

42

A MEASUREMENT OF DIJET PRODUCTION IN NEUTRAL CURRENT DEEP INELASTIC SCATTERING WITH ZEUS AT HERA  

E-print Network

production cross sections are measured in the range 10 detector in deep in Hamburg some of the greatest in my life. I don't dare try to mention all of them. However, that \\stinking Accelerator . . . . . . . . . . . . . . . . . . . . . . 15 2.2 The ZEUS Detector

43

Erosion, transport and deposition along the South-Central Chilean margin: the detrital apatite fission track perspective  

NASA Astrophysics Data System (ADS)

Detrital fission track analysis has become a powerful tool for the study of sediment provenance and exhumation of orogens. Many studies focus on zones of continental collision with no or little volcanic activity, but there are less examples from active arc-trench systems. This type of orogen has a strong magmatic signature, and upper plate tectonothermal histories that are distinct from collisional mountain belts. Uplift and denudation histories are different, and may comprise long periods of relative upper plate stability, which can be identified by thermochronological methods. In this study, we apply apatite fission track (AFT) single-grain age dating and sediment provenance analysis to modern and Pleistocene turbiditic sediments from the Chilean trench system (trench fans, trench fill, continental slope) complemented by a study of modern sediment samples from large Chilean rivers. The study area covers a ca. 1200 km long north to south transect (29°S to 47°S) encompassing areas of strongly variable characteristics, such as large latitudinal gradients in climate and terrigenous sediment input into the trench. This approach allows us (1) to trace sediment pathways on- and offshore focusing on all parts of the system, i.e. the bedrock sequences of the source, the fluvial transport system, and finally the sink within the trench, (2) to label those units that are under- and overrepresented, respectively, in the sink, making use of drainage system modeling and comparisons of grain age distributions to the cooling age pattern of the bedrocks of the feeder area, and (3) to test thermochronological concepts, such as a negligible transport time within the lag-time concept. We find that AFT dating and sediment analysis point to opposing major sediment sources in the Chilean margin: Whereas sediment petrography mirrors the evacuation of large volumes of volcanic detritus, reflecting the high rate of erosion of volcanic edifices, no such young volcanic signal is seen in the detrital AFT signature. Plutonic units are identified as the main, often unique sources for shedding apatite into the sedimentary system. This finding has important implications for studies on stratigraphically older sequences, where the feeder area has long been eroded, and where the youngest age population is often interpreted as an indicator for active volcanism. The most obvious feature observed within the detrital age population pattern along strike of the Chilean margin is an increasing contribution of sediment from the Andean Range to the south. This is explained by first-order controlling parameters such as lithology, increasing rainfall to the south, as well as ongoing uplift of the Coastal Cordillera. This recent mode of uplift, however, is not reflected in the actual (mainly Cretaceous) age of the population, which dominates the grain-age distributions in the northern half of the study area. This indicates a long-term relative tectonic stability of the forearc, corroborating that subduction erosion rather than tectonic erosion is the prevailing tectonic mode of this long-lived segment of the South American continental margin. For the southernmost study area in the Patagonian Andes, it can be shown, that the sediment is derived from only small portions of the drainage along the main divide. This points to focused and rapid glacial erosion along the highest elevations. The results show, that in addition to the actual FT age, a second signal of short-term tectonic and erosional processes is preserved within the grain-age patterns.

Heberer, B.; Behrmann, J. H.; Rahn, M.

2009-04-01

44

Measurement of the Luminosity in the ZEUS Experiment at HERA II  

E-print Network

The luminosity in the ZEUS detector was measured using photons from electron bremsstrahlung. In 2001 the HERA collider was upgraded for operation at higher luminosity. At the same time the luminosity-measuring system of the ZEUS experiment was modified to tackle the expected higher photon rate and synchrotron radiation. The existing lead-scintillator calorimeter was equipped with radiation hard scintillator tiles and shielded against synchrotron radiation. In addition, a magnetic spectrometer was installed to measure the luminosity independently using photons converted in the beam-pipe exit window. The redundancy provided a reliable and robust luminosity determination with a systematic uncertainty of 1.7%. The experimental setup, the techniques used for luminosity determination and the estimate of the systematic uncertainty are reported.

Adamczyk, L; Bold, T; Borzemski, P; Buettner, C; Caldwell, A; Chwastowski, J; Daniluk, W; Drugakov, V; Eskreys, A; Figiel, J; Galas, A; Gil, M; Helbich, M; Januscheck, F; Jurkiewicz, P; Kisielewska, D; Klein, U; Kotarba, A; Lohmann, W; Ning, Y; Oliwa, K; Olkiewicz, K; Paganis, S; Pieron, J; Przybycien, M; Ren, Z; Ruchlewicz, W; Schmidke, W; Schneekloth, U; Sciulli, F; Stopa, P; Sztuk-Dambietz, J; Suszycki, L; Sutiak, J; Wierba, W; Zawiejski, L

2013-01-01

45

Measurement of the Luminosity in the ZEUS Experiment at HERA II  

E-print Network

The luminosity in the ZEUS detector was measured using photons from electron bremsstrahlung. In 2001 the HERA collider was upgraded for operation at higher luminosity. At the same time the luminosity-measuring system of the ZEUS experiment was modified to tackle the expected higher photon rate and synchrotron radiation. The existing lead-scintillator calorimeter was equipped with radiation hard scintillator tiles and shielded against synchrotron radiation. In addition, a magnetic spectrometer was installed to measure the luminosity independently using photons converted in the beam-pipe exit window. The redundancy provided a reliable and robust luminosity determination with a systematic uncertainty of 1.7%. The experimental setup, the techniques used for luminosity determination and the estimate of the systematic uncertainty are reported.

L. Adamczyk; J. Andruszkow; T. Bold; P. Borzemski; C. Buettner; A. Caldwell; J. Chwastowski; W. Daniluk; V. Drugakov; A. Eskreys; J. Figiel; A. Galas; M. Gil; M. Helbich; F. Januschek; P. Jurkiewicz; D. Kisielewska; U. Klein; A. Kotarba; W. Lohmann; Y. Ning; K. Oliwa; K. Olkiewicz; S. Paganis; J. Pieron; M. Przybycien; Z. Ren; W. Ruchlewicz; W. Schmidke; U. Schneekloth; F. Sciulli; P. Stopa; J. Sztuk-Dambietz; L. Suszycki; J. Sutiak; W. Wierba; L. Zawiejski

2013-06-13

46

Measurement of the luminosity in the ZEUS experiment at HERA II  

NASA Astrophysics Data System (ADS)

The luminosity in the ZEUS detector was measured using photons from electron bremsstrahlung off protons. In 2001 the HERA collider was upgraded for operation at higher luminosity. At the same time the luminosity-measuring system of the ZEUS experiment was modified to tackle the expected higher photon rate and synchrotron radiation. The existing lead-scintillator calorimeter was equipped with radiation hard scintillator tiles and shielded against synchrotron radiation. In addition, a magnetic spectrometer was installed to measure the luminosity independently using photons converted in the beam-pipe exit window. The redundancy provided a reliable and robust luminosity determination with a systematic uncertainty of 1.7%. The experimental setup, the techniques used for luminosity determination and the estimate of the systematic uncertainty are reported.

Adamczyk, L.; Andruszkow, J.; Bold, T.; Borzemski, P.; Buettner, C.; Caldwell, A.; Chwastowski, J.; Daniluk, W.; Drugakov, V.; Eskreys, A.; Figiel, J.; Galas, A.; Gil, M.; Helbich, M.; Januschek, F.; Jurkiewicz, P.; Kisielewska, D.; Klein, U.; Kotarba, A.; Lohmann, W.; Ning, Y.; Oliwa, K.; Olkiewicz, K.; Paganis, S.; Pieron, J.; Przybycien, M.; Ren, Z.; Ruchlewicz, W.; Schmidke, W.; Schneekloth, U.; Sciulli, F.; Stopa, P.; Sztuk-Dambietz, J.; Suszycki, L.; Sutiak, J.; Wierba, W.; Zawiejski, L.

2014-04-01

47

ZEUS next-to-leading-order QCD analysis of data on deep inelastic scattering  

Microsoft Academic Search

Next-to-leading-order QCD analyses of the ZEUS data on deep inelastic scattering together with fixed-target data have been performed, from which the gluon and quark densities of the proton and the value of the strong coupling constant alphas(MZ) were extracted. The study includes a full treatment of the experimental systematic uncertainties including point-to-point correlations. The resulting uncertainties in the parton density

S. V. Chekanov; D. Krakauer; S. Magill; B. Musgrave; J. Repond; R. Yoshida; M. C. Mattingly; P. Antonioli; G. Bari; M. Basile; L. Bellagamba; D. Boscherini; A. Bruni; G. Bruni; G. Cara Romeo; L. Cifarelli; F. Cindolo; A. Contin; M. Corradi; S. de Pasquale; P. Giusti; G. Iacobucci; A. Margotti; R. Nania; F. Palmonari; A. Pesci; G. Sartorelli; A. Zichichi; G. Aghuzumtsyan; D. Bartsch; I. Brock; J. Crittenden; S. Goers; H. Hartmann; E. Hilger; P. Irrgang; H.-P. Jakob; A. Kappes; U. F. Katz; R. Kerger; O. Kind; E. Paul; J. Rautenberg; R. Renner; H. Schnurbusch; A. Stifutkin; J. Tandler; K. C. Voss; A. Weber; D. S. Bailey; N. H. Brook; J. E. Cole; B. Foster; G. P. Heath; H. F. Heath; S. Robins; E. Rodrigues; J. Scott; R. J. Tapper; M. Wing; M. Capua; A. Mastroberardino; M. Schioppa; G. Susinno; J. Y. Kim; Y. K. Kim; J. H. Lee; I. T. Lim; M. Y. Pac; A. Caldwell; M. Helbich; X. Liu; B. Mellado; Y. Ning; S. Paganis; Z. Ren; W. B. Schmidke; F. Sciulli; J. Chwastowski; A. Eskreys; J. Figiel; K. Olkiewicz; K. Piotrzkowski; M. Przybycien; P. Stopa; L. Zawiejski; L. Adamczyk; T. Bold; I. Grabowska-Bold; D. Kisielewska; A. M. Kowal; M. Kowal; T. Kowalski; L. Suszycki; D. Szuba; J. Szuba; A. Kotanski; W. Slominski; L. A. Bauerdick; U. Behrens; K. Borras; V. Chiochia; D. Dannheim; M. Derrick; G. Drews; J. Fourletova; A. Fox-Murphy; U. Fricke; A. Geiser; F. Goebel; P. Göttlicher; O. Gutsche; T. Haas; W. Hain; G. F. Hartner; S. Hillert; U. Kötz; H. Kowalski; G. Kramberger; H. Labes; D. Lelas; B. Löhr; R. Mankel; M. Martínez; I.-A. Melzer-Pellmann; M. Moritz; D. Notz; M. C. Petrucci; A. Polini; A. Raval; U. Schneekloth; F. Selonke; B. Surrow; H. Wessoleck; R. Wichmann; G. Wolf; C. Youngman; W. Zeuner; A. Lopez-Duran Viani; A. Meyer; S. Schlenstedt; G. Barbagli; E. Gallo; C. Genta; P. G. Pelfer; A. Bamberger; A. Benen; N. Coppola; H. Raach; M. Bell; P. J. Bussey; A. T. Doyle; C. Glasman; S. Hanlon; S. W. Lee; A. Lupi; G. J. McCance; D. H. Saxon; I. O. Skillicorn; I. Gialas; B. Bodmann; T. Carli; U. Holm; K. Klimek; N. Krumnack; E. Lohrmann; M. Milite; H. Salehi; S. Stonjek; K. Wick; A. Ziegler; C. Collins-Tooth; C. Foudas; R. Gonçalo; K. R. Long; F. Metlica; D. B. Miller; A. D. Tapper; R. Walker; P. Cloth; D. Filges; M. Kuze; K. Nagano; K. Tokushuku; S. Yamada; Y. Yamazaki; A. N. Barakbaev; E. G. Boos; N. S. Pokrovskiy; B. O. Zhautykov; H. Lim; D. Son; F. Barreiro; O. González; L. Labarga; J. del Peso; I. Redondo; J. Terrón; M. Vázquez; M. Barbi; A. Bertolin; F. Corriveau; A. Ochs; S. Padhi; D. G. Stairs; M. St-Laurent; T. Tsurugai; A. Antonov; P. Danilov; B. A. Dolgoshein; D. Gladkov; V. Sosnovtsev; S. Suchkov; R. K. Dementiev; P. F. Ermolov; Yu. A. Golubkov; I. I. Katkov; L. A. Khein; I. A. Korzhavina; V. A. Kuzmin; B. B. Levchenko; O. Yu. Lukina; A. S. Proskuryakov; L. M. Shcheglova; N. N. Vlasov; S. A. Zotkin; C. Bokel; M. Botje; J. Engelen; S. Grijpink; E. Koffeman; P. Kooijman; E. Maddox; A. Pellegrino; S. Schagen; E. Tassi; H. Tiecke; N. Tuning; J. J. Velthuis; L. Wiggers; E. de Wolf; N. Brümmer; B. Bylsma; L. S. Durkin; J. Gilmore; C. M. Ginsburg; C. L. Kim; T. Y. Ling; S. Boogert; A. M. Cooper-Sarkar; R. C. Devenish; J. Ferrando; G. Grzelak; T. Matsushita; M. Rigby; O. Ruske; M. R. Sutton; R. Walczak; R. Brugnera; R. Carlin; F. dal Corso; S. Dusini; A. Garfagnini; S. Limentani; A. Longhin; A. Parenti; M. Posocco; L. Stanco; M. Turcato; E. A. Heaphy; B. Y. Oh; P. R. Saull; J. J. Whitmore; Y. Iga; G. D'Agostini; G. Marini; A. Nigro; C. Cormack; J. C. Hart; N. A. McCubbin; C. Heusch; I. H. Park; N. Pavel; H. Abramowicz; A. Gabareen; S. Kananov; A. Kreisel; A. Levy; T. Abe; T. Fusayasu; S. Kagawa; T. Kohno; T. Tawara; T. Yamashita; R. Hamatsu; T. Hirose; M. Inuzuka; S. Kitamura; K. Matsuzawa; T. Nishimura; M. Arneodo; N. Cartiglia; R. Cirio; M. Costa; M. I. Ferrero; S. Maselli; V. Monaco; C. Peroni; M. Ruspa; R. Sacchi; A. Solano; A. Staiano; R. Galea; T. Koop; G. M. Levman; J. F. Martin; A. Mirea; A. Sabetfakhri; J. M. Butterworth; C. Gwenlan; R. Hall-Wilton; T. W. Jones; M. S. Lightwood; J. H. Loizides; B. J. West; J. Ciborowski; R. Ciesielski; R. J. Nowak; J. M. Pawlak; B. Smalska; J. Sztuk; T. Tymieniecka; A. Ukleja; J. Ukleja; A. F. Zarnecki; M. Adamus; P. Plucinski; Y. Eisenberg; L. K. Gladilin; D. Hochman; U. Karshon; D. Kçira; S. Lammers; L. Li; D. D. Reeder; A. A. Savin; W. H. Smith; A. Deshpande; S. Dhawan; V. W. Hughes; P. B. Straub; S. Bhadra; C. D. Catterall; S. Fourletov; S. Menary; M. Soares; J. Standage

2003-01-01

48

Study of deep inelastic inclusive and diffractive scattering with the ZEUS forward plug calorimeter  

Microsoft Academic Search

Deep inelastic scattering and its diffractive component, ep?e???p?e?XN, have been studied at HERA with the ZEUS detector using an integrated luminosity of 4.2 pb?1. The measurement covers a wide range in the ??p c.m. energy W (37–245 GeV), photon virtuality Q2 (2.2–80 GeV2) and mass MX (0.28–35 GeV). The diffractive cross section for MX>2 GeV rises strongly with W; the rise is

S. Bhadra; C. D. Catterall; Y. Cui; G. Hartner; S. Miglioranzi; U. Noor; M. Soares; J. Standage; J. Whyte; N. Pavel; A. G. Yagües Molina; P. Antonioli; G. Bari; M. Basile; L. Bellagamba; D. Boscherini; A. Bruni; G. Bruni; G. Cara Romeo; L. Cifarelli; F. Cindolo; A. Contin; M. Corradi; S. de Pasquale; P. Giusti; G. Iacobucci; A. Margotti; A. Montanari; R. Nania; F. Palmonari; A. Pesci; A. Polini; L. Rinaldi; G. Sartorelli; A. Zichichi; G. Aghuzumtsyan; D. Bartsch; I. Brock; S. Goers; H. Hartmann; E. Hilger; P. Irrgang; H.-P. Jakob; O. Kind; U. Meyer; E. Paul; J. Rautenberg; R. Renner; K. C. Voss; M. Wang; M. Wlasenko; D. S. Bailey; N. H. Brook; J. E. Cole; G. P. Heath; T. Namsoo; S. Robins; M. Capua; A. Mastroberardino; M. Schioppa; G. Susinno; E. Tassi; J. Y. Kim; K. J. Ma; M. Helbich; Y. Ning; Z. Ren; W. B. Schmidke; F. Sciulli; J. Chwastowski; A. Eskreys; J. Figiel; A. Galas; K. Olkiewicz; P. Stopa; D. Szuba; L. Zawiejski; L. Adamczyk; T. Bold; I. Grabowska-Bold; D. Kisielewska; A. M. Kowal; J. Lukasik; M. Przybycien; L. Suszycki; J. Szuba; A. Kotanski; W. Slominski; V. Adler; U. Behrens; I. Bloch; K. Borras; D. G. Cassel; G. Drews; J. Fourletova; A. Geiser; D. Gladkov; F. Goebel; P. Göttlicher; R. Graciani Diaz; O. Gutsche; T. Haas; W. Hain; C. Horn; B. Kahle; M. Kasemann; U. Kötz; H. Kowalski; G. Kramberger; D. Lelas; H. Lim; B. Löhr; R. Mankel; M. Martinez; I.-A. Melzer-Pellmann; C. N. Nguyen; D. Notz; A. E. Nuncio-Quiroz; A. Raval; R. Santamarta; U. Schneekloth; U. Stösslein; G. Wolf; C. Youngman; W. Zeuner; S. Schlenstedt; G. Barbagli; E. Gallo; C. Genta; P. G. Pelfer; A. Bamberger; A. Benen; F. Karstens; D. Dobur; N. N. Vlasov; P. J. Bussey; A. T. Doyle; J. Ferrando; S. Hanlon; D. H. Saxon; I. O. Skillicorn; I. Gialas; T. Carli; T. Gosau; U. Holm; N. Krumnack; E. Lohrmann; M. Milite; H. Salehi; P. Schleper; T. Schörner-Sadenius; S. Stonjek; K. Wichmann; K. Wick; A. Ziegler; C. Collins-Tooth; C. Foudas; C. Fry; R. Gonçalo; K. R. Long; A. D. Tapper; M. Kataoka; K. Nagano; K. Tokushuku; S. Yamada; Y. Yamazaki; A. N. Barakbaev; E. G. Boos; N. S. Pokrovskiy; B. O. Zhautykov; D. Son; J. de Favereau; K. Piotrzkowski; F. Barreiro; C. Glasman; O. González; M. Jimenez; L. Labarga; J. Del Peso; J. Terrón; M. Zambrana; M. Barbi; F. Corriveau; C. Liu; S. Padhi; M. Plamondon; D. G. Stairs; R. Walsh; C. Zhou; T. Tsurugai; A. Antonov; P. Danilov; B. A. Dolgoshein; V. Sosnovtsev; A. Stifutkin; S. Suchkov; R. K. Dementiev; P. F. Ermolov; L. K. Gladilin; I. I. Katkov; L. A. Khein; I. A. Korzhavina; V. A. Kuzmin; B. B. Levchenko; O. Yu. Lukina; A. S. Proskuryakov; L. M. Shcheglova; D. S. Zotkin; S. A. Zotkin; I. Abt; C. Büttner; A. Caldwell; X. Liu; J. Sutiak; N. Coppola; G. Grigorescu; S. Grijpink; A. Keramidas; E. Koffeman; P. Kooijman; E. Maddox; A. Pellegrino; S. Schagen; H. Tiecke; M. Vázquez; L. Wiggers; E. de Wolf; N. Brümmer; B. Bylsma; L. S. Durkin; T. Y. Ling; P. D. Allfrey; M. A. Bell; A. M. Cooper-Sarkar; A. Cottrell; R. C. E. Devenish; B. Foster; G. Grzelak; C. Gwenlan; T. Kohno; S. Patel; P. B. Straub; R. Walczak; P. Bellan; A. Bertolin; R. Brugnera; R. Carlin; R. Ciesielski; F. Dal Corso; S. Dusini; A. Garfagnini; S. Limentani; A. Longhin; L. Stanco; M. Turcato; E. A. Heaphy; F. Metlica; B. Y. Oh; J. J. Whitmore; Y. Iga; G. D'Agostini; G. Marini; A. Nigro; J. C. Hart; H. Abramowicz; A. Gabareen; M. Groys; S. Kananov; A. Kreisel; A. Levy; M. Kuze; S. Kagawa; T. Tawara; R. Hamatsu; H. Kaji; S. Kitamura; K. Matsuzawa; O. Ota; Y. D. Ri; M. Costa; M. I. Ferrero; V. Monaco; R. Sacchi; A. Solano; M. Arneodo; M. Ruspa; S. Fourletov; T. Koop; J. F. Martin; A. Mirea; J. M. Butterworth; R. Hall-Wilton; T. W. Jones; J. H. Loizides; M. R. Sutton; C. Targett-Adams; M. Wing; J. Ciborowski; P. Kulinski; P. Luzniak; J. Malka; R. J. Nowak; J. M. Pawlak; J. Sztuk; T. Tymieniecka; A. Tyszkiewicz; A. Ukleja; J. Ukleja; A. F. Zarnecki; M. Adamus; P. Plucinski; Y. Eisenberg; D. Hochman; U. Karshon; M. S. Lightwood; A. Everett; D. Kçira; S. Lammers; L. Li; D. D. Reeder; M. Rosin; P. Ryan; A. A. Savin; W. H. Smith; S. Dhawan; S. Menary

2005-01-01

49

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

E-print Network

of the Parthenon is 14° 45? and that of the Temple of Apollo at Bassai is 15° 14? (Bassai I, pp. 246, 251). 51. Grunauer 1974. 52. Plinths: Alpheios A, Zeus H, Pelops G, Oinomaos J, horse sets D and M, sitting attendant E, mantled attendant C, chitoned... (three) and chitoned O (one). 53. Dörpfeld 1892, p. 7; Treu 1897, pp. 116–117, fig. 166; Säflund 1970, p. 24; Grunauer 1974, p. 8, fig. 7; Trianti 2002, p. 290. The sculptures in the north pediment of the Hieron at Samothrace stood on a similar...

Younger, John G.; Rehak, Paul

2009-01-01

50

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

E-print Network

The latest results of the ZEUS collaboration on the high Q2, the exchanged boson virtuality, high Bjorken x region up to values of x = 1 are presented. Differential cross sections in x and Q2 are given for Q2 > 725 GeV2. An improved reconstruction method and a substantially increased amount of data allow a finer binning in the high-x region of the neutral current cross section and lead 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.

Aharon Levy

2014-07-17

51

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

SciTech Connect

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

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

2014-01-01

52

Probing Star Formation in the Early Universe with Far-IR Spectroscopy using ZEUS-2  

NASA Astrophysics Data System (ADS)

ZEUS-2 is a long slit, direct detection, grating spectrometer for submillimeter wavelengths between 200-850 ?m. At present, ZEUS-2 employs a single TES bolometer array that addresses only the 350 and 450 ?m windows. Here we report the first science obtained with this array on the Atacama Pathfinder Experiment (APEX) telescope, and our progress towards implementing a second TES array that will open up the 200, 230, 640, 850 ?m windows for direct detection spectroscopy on APEX.Our investigations focus on detecting faint and broad far-infrared (FIR) fine structure lines of ionized carbon [CII] at 158 ?m, nitrogen [NII] at 122 and 205 ?m and doubly ionized oxygen [OIII] at 52 and 88 ?m from distant galaxies as the lines are redshifted into the submm telluric windows. We are primarily interested in the redshift 1 to 4 interval which encompasses the epoch of maximum star formation rate per unit co-moving volume in the Universe. These far infrared lines are important gas coolants, and powerful probes of the physical conditions of the interstellar medium and the starlight that heats the gas. Here we report detections of the [CII] and [OIII] 88 ?m lines from sources at redshift 1.8 to 4.3, and show how the lines can be used to trace both the spatial extent of the star formation and the hardness of the ambient radiation fields.

Vishwas, Amit; Ferkinhoff, Carl; Nikola, Thomas; Parshley, Stephen; Schoenwald, Justin Paul; Stacey, Gordon J.; Higdon, James L.; Higdon, Sarah; Brisbin, Drew; Verma, Aprajita; Riechers, Dominik A.; Hailey-Dunsheath, Steve; Menten, Karl; Güsten, Rolf; Weiss, Axel; Irwin, Kent; Cho, Hsiao-Mei; Niemack, Michael D.; Halpern, Mark; Amiri, Mandana; Hasselfield, Matthew; Wiebe, Donald V.; Ade, Peter A. R.; Tucker, Carole E.

2015-01-01

53

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

54

Use of the voice-controlled and computer-assisted surgical system zeus for endoscopic coronary artery bypass grafting  

Microsoft Academic Search

Objective: With the aim of performing a completely endoscopic coronary bypass anastomosis, we have undertaken an experimental and clinical study using robotic instrumentation and voice-controlled camera guidance. Methods: The ZEUS Robotic Surgical System (Computer Motion Inc, Goleta, Calif) consists of three interactive robotic arms and a control unit, allowing the surgeon to move the instrument arms in a scaled down

Hermann Reichenspurner; Ralph J. Damiano; Michael Mack; Dieter H. Boehm; Helmut Gulbins; Christian Detter; Bruno Meiser; Reinhard Ellgass; Bruno Reichart

1999-01-01

55

Number Tracks  

NSDL National Science Digital Library

This problem provides an opportunity for children to explore and visualize number patterns and sequences and to reinforce key number concepts and vocabulary such as odd and even, factors and multiples. Students cut consecutive number tracks into equal length pieces in several ways and investigate the patterns that emerge among the sums of the tracks. The Teachers' Notes page explains number tracks and offers suggestions for implementation, discussion questions, a printable sheet of number tracks (pdf), and ideas for extension and support.

56

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.

Paula Rogers Huff

2005-01-01

57

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.

58

Fraction Track  

NSDL National Science Digital Library

This interactive applet provides a visual model to help students compare fractions and understand equivalent fractions. The applet displays eight fraction tracks (unit number lines) divided into fractional increments from halves to twelfths. The user turns over cards displaying fractions and moves sliders on the tracks a distance equal to or less than the target fractions. The goal is to move all the sliders to the end of each fraction track in the least number of moves.

2009-01-01

59

Measurement of the cross section for the reaction ?p ? J\\/? p with the ZEUS detector at HERA  

Microsoft Academic Search

This paper reports the cross section measurements for the process ep ? e J\\/? p for Q2 < 4 GeV2 at s = 296 GeV, based on an integrated luminosity of about 0.5 pb?1, using the ZEUS detector. The J\\/? was detected in its e+e? and ?+?? decay modes. The photoproduction cross section was measured to be 52?12+7 ± 10

S. Bhadra; M. L. Cardy; C.-P Fagerstroem; W. R. Frisken; K. M. Furutani; M. Khakzad; W. B. Schmidke; R. L. Talaga; H. Zhang; R. Ayad; G. Bari; M. Basile; L. Bellagamba; D. Boscherini; A. Bruni; G. Bruni; P. Bruni; G. Cara Romeo; G. Castellini; M. Chiarini; L. Cifarelli; F. Cindolo; A. Contin; M. Corradi; I. Gialas; P. Giusti; G. Iacobucci; G. Laurenti; G. Levi; A. Margotti; T. Massam; R. Nania; C. Nemoz; F. Palmonari; A. Polini; G. Sartorelli; R. Timellini; Y. Zamora Garcia; A. Zichichi; A. Bargende; J. Crittenden; K. Desch; B. Diekmann; T. Doeker; M. Eckert; L. Feld; A. Frey; M. Geerts; G. Geitz; M. Grothe; T. Haas; H. Hartmann; D. Haun; K. Heinloth; E. Hilger; H.-P. Jakob; U. F. Katz; S. M. Mari; A. Mass; S. Mengel; J. Mollen; E. Paul; Ch. Rembser; R. Schattevoy; D. Schramm; J. Stamm; R. Wedemeyer; S. Campbell-Robson; A. Cassidy; N. Dyce; B. Foster; S. George; R. Gilmore; G. P. Heath; H. F. Heath; T. J. Llewellyn; C. J. S. Morgado; D. J. P. Norman; J. A. O'Mara; R. J. Tapper; S. S. Wilson; R. Yoshida; R. R. Rau; M. Arneodo; L. Iannotti; M. Schioppa; G. Susinno; A. Bernstein; A. Caldwell; N. Cartiglia; J. A. Parsons; S. Ritz; F. Sciulli; P. B. Straub; L. Wai; S. Yang; Q. Zhu; P. Borzemski; J. Chwastowski; A. Eskreys; K. Piotrzkowski; M. Zachara; L. Zawiejski; L. Adamczyk; B. Bednarek; K. Jelen; D. Kisielewska; T. Kowalski; E. Rulikowska-Zarebska; L. Suszycki; J. Zajac; A. Kotanski; M. Przybycien; L. A. T. Bauerdick; U. Behrens; H. Beier; J. K. Bienlein; C. Coldewey; O. Deppe; K. Desler; G. Drews; M. Flasinski; D. J. Gilkinson; C. Glasman; P. Göttlicher; J. Große-Knetter; B. Gutjahr; W. Hain; D. Hasell; H. Heßling; Y. Iga; P. Joos; M. Kasemann; R. Klanner; W. Koch; L. Köpke; U. Kötz; H. Kowalski; J. Labs; A. Ladage; B. Löhr; M. Löwe; D. Lüke; O. Manczak; T. Monteiro; J. S. T. Ng; S. Nickel; D. Notz; K. Ohrenberg; M. Roco; M. Rohde; J. Roldán; U. Schneekloth; W. Schulz; F. Selonke; E. Stiliaris; B. Surrow; T. Voß; D. Westphal; G. Wolf; C. Youngman; J. F. Zhou; H. J. Grabosch; A. Kharchilava; A. Leich; M. C. K. Mattingly; A. Meyer; S. Schlenstedt; N. Wulff; G. Barbagli; P. Pelfer; G. Anzivino; G. Maccarrone; S. de Pasquale; L. Votano; A. Bamberger; S. Eisenhardt; A. Freidhof; S. Söldner-Rembold; J. Schroeder; T. Trefzger; N. H. Brook; P. J. Bussey; A. T. Doyle; J. I. Fleck; D. H. Saxon; M. L. Utley; A. S. Wilson; A. Dannemann; U. Holm; D. Horstmann; T. Neumann; R. Sinkus; K. Wick; E. Badura; B. D. Burow; L. Hagge; E. Lohrmann; J. Mainusch; J. Milewski; M. Nakahata; N. Pavel; G. Poelz; W. Schott; F. Zetsche; T. C. Bacon; I. Butterworth; E. Gallo; V. L. Harris; B. Y. H. Hung; K. R. Long; D. B. Miller; P. P. O. Morawitz; A. Prinias; J. K. Sedgbeer; A. F. Whitfield; U. Mallik; E. McCliment; M. Z. Wang; S. M. Wang; J. T. Wu; Y. Zhang; P. Cloth; D. Filges; S. H. An; S. M. Hong; S. W. Nam; S. K. Park; M. H. Suh; S. H. Yon; R. Imlay; S. Kartik; H.-J. Kim; R. R. McNeil; W. Metcalf; V. K. Nadendla; F. Barreiro; G. Cases; R. Graciani; J. M. Hernández; L. Hervás; L. Labarga; J. del Peso; J. Puga; J. Terron; J. F. de Trocóniz; G. R. Smith; F. Corriveau; D. S. Hanna; J. Hartmann; L. W. Hung; J. N. Lim; C. G. Matthews; P. M. Patel; L. E. Sinclair; D. G. Stairs; M. St. Laurent; R. Ullmann; G. Zacek; V. Bashkirov; B. A. Dolgoshein; A. Stifutkin; G. L. Bashindzhagyan; P. F. Ermolov; L. K. Gladilin; Y. A. Golubkov; V. D. Kobrin; V. A. Kuzmin; A. S. Proskuryakov; A. A. Savin; L. M. Shcheglova; A. N. Solomin; N. P. Zotov; M. Botje; F. Chlebana; A. Dake; J. Engelen; M. de Kamps; P. Kooijman; A. Kruse; H. Tiecke; W. Verkerke; M. Vreeswijk; L. Wiggers; E. de Wolf; R. van Woudenberg; D. Acosta; B. Bylsma; L. S. Durkin; K. Honscheid; C. Li; T. Y. Ling; K. W. McLean; W. N. Murray; I. H. Park; T. A. Romanowski; R. Seidlein; D. S. Bailey; G. A. Blair; A. Byrne; R. J. Cashmore; A. M. Cooper-Sarkar; D. Daniels; R. C. E. Devenish; N. Harnew; M. Lancaster; P. E. Luffman; L. Lindemann; J. D. McFall; C. Nath; V. A. Noyes; A. Quadt; H. Uijterwaal; R. Walczak; F. F. Wilson; T. Yip; G. Abbiendi; A. Bertolin; R. Brugnera; R. Carlin; F. dal Corso; M. de Giorgi; U. Dosselli; S. Limentani; M. Morandin; M. Posocco; L. Stanco; R. Stroili; C. Voci; J. Bulmahn; J. M. Butterworth; R. G. Field; B. Y. Oh; J. J. Whitmore; G. D'Agostini; G. Marini; A. Nigro; E. Tassi; J. C. Hart; N. A. McCubbin; K. Prytz; T. P. Shah; T. L. Short; E. Barberis; T. Dubbs; C. Heusch; M. van Hook; B. Hubbard; W. Lockman; J. T. Rahn; H. F.-W. Sadrozinski; A. Seiden; J. Biltzinger; R. J. Seifert; A. H. Walenta; G. Zech; H. Abramowicz; G. Briskin; S. Dagan; A. Levy; T. Hasegawa; M. Hazumi; T. Ishii; M. Kuze; S. Mine; Y. Nagasawa; M. Nakao; I. Suzuki; K. Tokushuku; S. Yamada; Y. Yamazaki; M. Chiba; R. Hamatsu; T. Hirose; K. Homma; S. Kitamura; Y. Nakamitsu; K. Yamauchi; R. Cirio; M. Costa; M. I. Ferrero; L. Lamberti; S. Maselli

1995-01-01

60

Q2-evolution of parton densities at small x values and H1 and ZEUS experimental data  

NASA Astrophysics Data System (ADS)

It is shown that in the leading twist approximation of the Wilson operator product expansion with "frozen" and analytic strong coupling constants, considering the Bessel-inspired behavior of the structure functions F2 and the derivative ?lnF2/?ln(1/x) at small x values, obtained for a flat initial condition in the DGLAP evolution equations, leads to a good agreement with the deep inelastic scattering H1 and ZEUS experimental data from HERA.

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

2014-07-01

61

The origin of K-feldspar megacrysts hosted in alkaline potassic rocks from central Italy: a track for low-pressure processes in mafic magmas  

Microsoft Academic Search

In situ Sr-isotope and microchemical studies were used to determine the provenance of K-feldspar megacrysts hosted in mafic alkaline potassic, ultrapotassic rocks and in differentiated rocks from two nearby volcanic apparatus in central Italy.At Monte Cimino volcanic complex, mafic leucite-free ultrapotassic megacryst-bearing rocks of olivine latitic composition are associated with evolved latite and trachyte. Here, latites and trachytes straddle the

Giulia Perini; Frank J. Tepley; Jon P. Davidson; Sandro Conticelli

2003-01-01

62

Click-Tracking Blocker: Privacy Preservation by Disabling Search Engines' Click-Tracking  

E-print Network

Click-Tracking Blocker: Privacy Preservation by Disabling Search Engines' Click-Tracking Roberto and Computer Science University of Central Florida Orlando, FL 32816 USA Abstract--On a search engine result action will be tracked by returning back to the search engine first and then redirecting

Zou, Cliff C.

63

Design and Tests of the Silicon Sensors for the ZEUS Micro Vertex Detector  

E-print Network

To fully exploit the HERA-II upgrade,the ZEUS experiment has installed a Micro Vertex Detector (MVD) using n-type, single-sided, silicon micro-strip sensors with capacitive charge division. The sensors have a readout pitch of 120 micrometers, with five intermediate strips (20 micrometer strip pitch). The designs of the silicon sensors and of the test structures used to verify the technological parameters, are presented. Results on the electrical measurements are discussed. A total of 1123 sensors with three different geometries have been produced by Hamamatsu Photonics K.K. Irradiation tests with reactor neutrons and Co-60 photons have been performed for a small sample of sensors. The results on neutron irradiation (with a fluence of 1 x 10^{13} 1 MeV equivalent neutrons / cm^2) are well described by empirical formulae for bulk damage. The Co-60 photons (with doses up to 2.9 kGy) show the presence of generation currents in the SiO_2-Si interface, a large shift of the flatband voltage and a decrease of the hol...

Dannheim, D; Coldewey, C; Fretwurst, E; Garfagnini, A; Klanner, Robert; Martens, J; Koffeman, E; Tiecke, H G; Carlin, R

2003-01-01

64

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

Microsoft Academic Search

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

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

2006-01-01

65

Rover tracks  

NASA Technical Reports Server (NTRS)

Tracks made by the Sojourner rover are visible in this image, taken by one of the cameras aboard Sojourner on Sol 3. The tracks represent the rover maneuvering towards the rock dubbed 'Barnacle Bill.' The rover, having exited the lander via the rear ramp, first traveled towards the right portion of the image, and then moved forward towards the left where Barnacle Bill sits. The fact that the rover was making defined tracks indicates that the soil is made up of particles on a micron scale.

Mars Pathfinder was developed and managed by the Jet Propulsion Laboratory (JPL) for the National Aeronautics and Space Administration.

1997-01-01

66

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

67

Single Track  

NSDL National Science Digital Library

This shunting puzzle asks students to use a siding to allow two trains to pass one another on a single track. The difficulty is that the siding length is limited. Teaching suggestions, a printable page, and a solution are included.

2013-01-01

68

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

Microsoft Academic Search

A new method is employed to measure the neutral current cross section up to Bjorken-x values of one with the ZEUS detector\\u000a at HERA using an integrated luminosity of 65.1 pb-1 for e+p collisions and 16.7 pb-1 for e-p collisions at and 38.6 pb-1 for e+p collisions at . Cross sections have been extracted for Q2?648 GeV2 and are compared to predictions using different

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

2007-01-01

69

The CMS Drift Tube Trigger Track Finder  

Microsoft Academic Search

Muons are among the decay products of many new particles that may be discovered at the CERN Large Hadron Collider. At the first trigger level the identification of muons and the determination of their transverse momenta and location are performed by the Drift Tube Trigger Track Finder in the central region of the CMS (Compact Muon Solenoid) experiment, using track

Janos Erö; Christian Deldicque; M. Galánthay; Herbert Bergauer; Manfred Jeitler; Kurt Kastner; Barbara Neuherz; Ivan Mikulec; Michael Padrta; Herbert Rohringer; Hannes Sakulin; Anton Taurok; Claudia-Elisabeth Wulz; Alessandro Montanari; Gaetano-Marco Dallavalle; Luigi Guiducci; Giuliano Pellegrini; J. Fernández de Trocóniz; I. Jiménez

2008-01-01

70

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, Keplerâs 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

71

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.

Dan Bunker

2010-01-01

72

Make Tracks  

NSDL National Science Digital Library

Design a roller coaster and then climb aboard and see how it rides! You can watch the ride from right above the car itself or, if your stomach isnât up to that, from a fixed position away from the track. Youâll get a continuous readout of the coaster speed and acceleration.

2004-06-03

73

Tracks Revisited.  

ERIC Educational Resources Information Center

Describes a contemporary adaptation of the "Footprint Puzzle," whigh was first developed in the 1960s for the Earth Science Curriculum Project. Students sequentially look at three frames of track drawings. For each frame, students first list observations and then make inferences about the observations. (PR)

Scarnati, James T.

1993-01-01

74

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

75

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.

76

Deep Inelastic Scattering at HERA NC and CC at High Q2 EW and QCD fits H1 + ZEUS combination Summary  

E-print Network

Summary High Q2 physics at HERA Syed Umer Noor York University, Canada On Behalf of the ZEUS and H1 Collaborations PASCOS 08, June 2008, Perimeter Institute for Theoretical Physics, Waterloo, Canada Syed Umer Noor 105 GeV2 (set by s) min 10-18m Rproton/1000 Syed Umer Noor (York University) High Q2 physics at HERA

77

Tracking Sunspots  

NSDL National Science Digital Library

In this activity, students track the movements of sunspots using images from the Solar and Heliospheric Observatory (SOHO) satellite. Working in pairs, they observe images of the sun from consecutive days and plot the sunspots on a grid, then calculate average daily movement (in degrees of latitude) and use this information to determine the length of the solar day. The individual daily images are also combined to form a movie showing the sun's rotation.

78

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

79

Tracking Otters  

NSDL National Science Digital Library

This activity (on pages 38-43) has learners simulate the way scientists track and map the movement of otters in the wild using radio trackers. One learner plays the role of Sea Otter, and other pairs of learners play the roles of Receiver and Tracker. The Sea Otter uses a clicker to represent the electronic transmitter on the otter, and each blindfolded Receiver listens through a paper towel tube "antenna" while the Tracker records where their partner hears the loudest click.

Museum, University O.; Nebraska Cooperative Extension 4-H Youth Development

2001-01-01

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

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

8. Launch closure, closure track apron, tracks and track beam, ...  

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

8. Launch closure, closure track apron, tracks and track beam, view towards west - Ellsworth Air Force Base, Delta Flight, Launch Facility D-6, 4 miles north of Badlands National Park Headquarters, 4.5 miles east of Jackson County line on county road, Interior, Jackson County, SD

83

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

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.

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.

2013-02-08

86

Kernel-Based Object Tracking  

Microsoft Academic Search

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

Dorin Comaniciu; Visvanathan Ramesh; Peter Meer

2003-01-01

87

CENTRAL AVENUE CENTRAL AVENUE  

E-print Network

., 10 am­4 pm 2 China Moon Restaurant 121 Central Park Sq. 662-2883 Chinese, Thai, and vegetarian. Mon 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

88

CENTRAL AVENUE CENTRAL AVENUE  

E-print Network

Sun., 10 am­4 pm 2 China Moon Restaurant 121 Central Park Sq. 662-2883 Chinese, Thai, and vegetarian 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

89

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

E-print Network

finished and dedicated close to the time Sparta, after defeating Athens at Tanagra in 457, dedicated a Nike as the central akroterion over the east pediment; the inscribed base, which survives, supported a gold shield.'^ If, for argument's sake, we...- tures Tiryns in 468 and Mycenae in 462. Sparta's slow recovery began with an alliance with Athens in 464 to re- capture her Helots and culminated in the battle ofTanagra in 457; her dedi- cation of the Nike and gold shield sealed her resumed ascendancy...

Younger, John G.

2009-01-01

90

Study of charged---current ep interactions at Q 2>200 GeV2 with the ZEUS detector at HERA  

Microsoft Academic Search

Deep inelastic charged-current reactions have been studied in e + p and e - p collisions at a center of mass energy of about 300GeV in the kinematic region Q 2>200GeV2 and x>0.006 using the ZEUS detector at HERA. The integrated cross sections for Q 2>200GeV2 are found to be sigma _{e^ + p to bar nu X} = 30.3_{

M. Derrick; D. Krakauer; S. Magill; D. Mikunas; B. Musgrave; J. R. Okrasinski; J. Repond; R. Stanek; R. L. Talaga; H. Zhang; M. C. K. Mattingly; P. Antonioli; G. Bari; M. Basile; L. Bellagamba; D. Boscherini; A. Bruni; G. Bruni; P. Bruni; G. Cara Romeo; G. Castellini; L. Cifarelli; F. Cindolo; A. Contin; M. Corradi; I. Gialas; P. Giusti; G. Iacobucci; G. Laurenti; G. Levi; A. Margotti; T. Massam; R. Nania; F. Palmonari; A. Pesci; A. Polini; G. Sartorelli; Y. Zamora Garcia; A. Zichichi; C. Amelung; A. Bornheim; J. Crittenden; R. Deffner; T. Doeker; M. Eckert; L. Feld; A. Frey; M. Geerts; M. Grothe; H. Hartmann; K. Heinloth; L. Heinz; E. Hilger; H.-P. Jakob; U. F. Katz; S. Mengel; E. Paul; M. Pfeiffer; Ch. Rembser; D. Schramm; J. Stamm; R. Wedemeyer; S. Campbell-Robson; A. Cassidy; W. N. Cottingham; N. Dyce; B. Foster; S. George; M. E. Hayes; G. P. Heath; H. F. Heath; D. Piccioni; D. G. Roff; R. J. Tapper; R. Yoshida; M. Arneodo; R. Ayad; M. Capua; A. Garfagnini; L. Iannotti; M. Schioppa; G. Susinno; A. Caldwell; N. Cartiglia; Z. Jing; W. Liu; J. A. Parsons; S. Ritz; F. Sciulli; P. B. Straub; L. Wai; S. Yang; Q. Zhu; P. Borzemski; J. Chwastowski; A. Eskreys; Z. Jakubowski; M. B. Przybycien; M. Zachara; L. Zawiejski; L. Adamczyk; B. Bednarek; K. Jelen; D. Kisielewska; T. Kowalski; E. Rulikowska-Zarebska; L. Suszycki; J. Zajac; Z. Dulinski; A. Kotanski; G. Abbiendi; L. A. T. Bauerdick; U. Behrens; H. Beier; J. K. Bienlein; G. Cases; O. Deppe; K. Desler; G. Drews; M. Flasinski; D. J. Gilkinson; C. Glasman; P. Göttlicher; J. Große-Knetter; T. Haas; W. Hain; D. Hasell; H. Heßling; Y. Iga; K. F. Johnson; P. Joos; M. Kasemann; R. Klanner; W. Koch; U. Kötz; H. Kowalski; J. Labs; A. Ladage; B. Löhr; M. Löwe; D. Lüke; J. Mainusch; O. Manczak; J. Milewski; T. Monteiro; J. S. T. Ng; D. Notz; K. Ohrenberg; K. Piotrzkowski; M. Roco; M. Rohde; J. Roldán; U. Schneekloth; W. Schulz; F. Selonke; B. Surrow; E. Tassi; T. Voß; D. Westphal; G. Wolf; U. Wollmer; C. Youngman; W. Zeuner; H. J. Grabosch; A. Kharchilava; S. M. Mari; A. Meyer; S. Schlenstedt; N. Wulff; G. Barbagli; E. Gallo; P. Pelfer; G. Maccarrone; S. de Pasquale; L. Votano; A. Bamberger; S. Eisenhardt; T. Trefzger; S. Wölfle; J. T. Bromley; N. H. Brook; P. J. Bussey; A. T. Doyle; D. H. Saxon; L. E. Sinclair; M. L. Utley; A. S. Wilson; A. Dannemann; U. Holm; D. Horstmann; R. Sinkus; K. Wick; B. D. Burow; L. Hagge; E. Lohrmann; G. Poelz; W. Schott; F. Zetsche; T. C. Bacon; N. Brümmer; I. Butterworth; V. L. Harris; G. Howell; B. H. Y. Hung; L. Lamberti; K. R. Long; D. B. Miller; N. Pavel; A. Prinias; J. K. Sedgbeer; D. Sideris; A. F. Whitfield; U. Mallik; M. Z. Wang; S. M. Wang; J. T. Wu; P. Cloth; D. Filges; S. H. An; G. H. Cho; B. J. Ko; S. B. Lee; S. W. Nam; H. S. Park; S. K. Park; S. Kartik; H.-J. Kim; R. R. McNeil; W. Metcalf; V. K. Nadendla; F. Barreiro; J. P. Fernandez; R. Graciani; J. M. Hernández; L. Hervás; L. Labarga; M. Martinez; J. Del Peso; J. Puga; J. Terron; J. F. de Trocóniz; F. Corriveau; D. S. Hanna; J. Hartmann; L. W. Hung; J. N. Lim; C. G. Matthews; P. M. Patel; M. Riveline; D. G. Stairs; M. St-Laurent; R. Ullmann; G. Zacek; T. Tsurugai; V. Bashkirov; B. A. Dolgoshein; A. Stifutkin; G. L. Bashindzhagyan; P. F. Ermolov; L. K. Gladilin; Yu. A. Golubkov; V. D. Kobrin; I. A. Korzhavina; V. A. Kuzmin; O. Yu. Lukina; A. S. Proskuryakov; A. A. Savin; L. M. Shcheglova; A. N. Solomin; N. P. Zotov; M. Botje; F. Chlebana; J. Engelen; M. de Kamps; P. Kooijman; A. Kruse; A. van Sighem; H. Tiecke; W. Verkerke; J. Vossebeld; M. Vreeswijk; L. Wiggers; E. de Wolf; R. van Woudenberg; D. Acosta; B. Bylsma; L. S. Durkin; J. Gilmore; C. Li; T. Y. Ling; P. Nylander; I. H. Park; T. A. Romanowski; D. S. Bailey; R. J. Cashmore; A. M. Cooper-Sarkar; R. C. E. Devenish; N. Harnew; M. Lancaster; L. Lindemann; J. D. McFall; C. Nath; V. A. Noyes; A. Quadt; J. R. Tickner; H. Uijterwaal; R. Walczak; D. S. Waters; F. F. Wilson; T. Yip; A. Bertolin; R. Brugnera; R. Carlin; F. Dal Corso; M. de Giorgi; U. Dosselli; S. Limentani; M. Morandin; M. Posocco; L. Stanco; R. Stroili; C. Voci; F. Zuin; J. Bulmahn; R. G. Feild; B. Y. Oh; J. J. Whitmore; G. D'Agostini; G. Marini; A. Nigro; J. C. Hart; N. A. McCubbin; T. P. Shah; E. Barberis; T. Dubbs; C. Heusch; M. van Hook; W. Lockman; J. T. Rahn; H. F.-W. Sadrozinski; A. Seiden; D. C. Williams; J. Biltzinger; R. J. Seifert; O. Schwarzer; A. H. Walenta; H. Abramowicz; G. Briskin; S. Dagan; A. Levy; J. I. Fleck; M. Inuzuka; T. Ishii; M. Kuze; S. Mine; M. Nakao; I. Suzuki; K. Tokushuku; K. Umemori; S. Yamada; Y. Yamazaki; M. Chiba; R. Hamatsu; T. Hirose; K. Homma; S. Kitamura; T. Matsushita; K. Yamauchi; R. Cirio; M. Costa; M. I. Ferrero; S. Maselli; C. Peroni; R. Sacchi; A. Solano; A. Staiano; M. Dardo; D. C. Bailey; F. Benard; M. Brkic; C.-P. Fagerstroem; G. F. Hartner; K. K. Joo; G. M. Levman

1996-01-01

91

Snake River (SR)-type" Volcanism: a new Category of Voluminous Explosive Volcanism Defined by a Distinctive Facies-Association in part of the Yellowstone Hotspot Track, Central Snake River Plain, USA.  

NASA Astrophysics Data System (ADS)

Along parts of the Yellowstone hot-spot track voluminous silicic volcanic rocks record large-scale silicic volcanism that differs in several respects from typical large-scale silicic volcanism elsewhere. The volcanic facies associations are sufficiently distinctive to merit a new term: "Snake River (SR)-type" volcanism. This new category of volcanism is defined with reference to deposit characteristics because it involves styles of eruption that have not been witnessed, and which are not fully understood. The distinctive SR-type characteristics, summarised below, are best preserved within 13 - 8 Ma volcanic successions that cover an area of southern central Idaho and northern Nevada, which we propose as the "type" example. (1) SR-type rhyolite lavas are unusually large volume (50-200 km3) and extensive (>200 km2), with low aspect-ratios, whereas smaller domes or coulees that characterise many rhyolite fields elsewhere are scarce. (2) The ignimbrites are typically large volume (VEI 6-8) but contain few pumice lapilli or fiamme. They are better sorted than typical ignimbrites, and plot outside the commonly used ignimbrite sorting vs. median diameter field. (3) The ignimbrites are characteristically lithic poor, even near inferred source areas. (4) Abundant small angular clasts of dense obsidian and vitrophyre occur within many of the ignimbrites and the fallout deposits. (5) Most SR-type ignimbrites are high to extremely high-grade: they are intensely rheomorphic, even where they are thin; and many are dominated by lava-like lithofacies. Although few non-welded ignimbrites occur, moderately welded ignimbrites (e.g. of eutaxitic lapilli-tuff) are very scarce. (6) The fallout layers are unusual: instead of typical Plinian fallout layers of pumice lapilli, most are thin-bedded medium-grained ashfall layers, with large bubble-wall shards, easily visible without a hand lens. Many have been fused to vitrophyre by contact with overlying and underlying ignimbrite; this includes co-ignimbrite ashfall layers. (7) Ash pellets, ash-coated pellets, and accretionary lapilli are common, and even occur in welded lihologies. (8) Lacustrine-alluvial facies are abundant, and include rippled volcaniclastic sands and silts, ignimbrites with peperitic bases, pillow lavas, hyaloclastites and soils. Work is in progress to investigate the nature and origin of the unusual and enigmatic eruption styles manifested by SR-type volcanism. The eruptions were high mass-flux, sustained, and involved unusually fluidal, hot (950-1050C) metaluminous rhyolite magmas with low H2O and elevated contents of HFSE and halogens. There is a close bimodal association with "plains type" basaltic volcanism, the presence of shallow epicontinental lakes, and with low-delta 18O. The distinctive type of volcanism is regionally devastating, and seems to have occurred at several times in Earth history because several SR-type features occur within other volcanic provinces such as Trans-Pecos Texas, Etendeka-Parana, Lebombo, the English Lake District, the Proterozoic Keewanawan volcanics of Minnesota and the Yardea Dacite of Australia.

Andrews, G. D.; Branney, M. J.; Bonnichsen, B.; Ellis, B. S.; Barry, T.; McCurry, M. O.

2006-12-01

92

205Experience Track | Introduction  

E-print Network

and increasingly successful development. MOOCs (Massive Open Online Courses) in particular (Cormier, 2008; Downes containing two tracks: a SPOC (Small Private Online Courses) track and a traditional track. In the new course205Experience Track | Introduction Online education supported by new technologies is a re- cent

Bonaventure, Olivier

93

Integrated photovoltaic central station conceptual design  

Microsoft Academic Search

Black and Veatch has developed the conceptual designs of 100 MW photovoltaic central stations using fixed, one-axis tracking, and two-axis tracking flat plate and two-axis tracking high concentration collectors. Designs were established for sites in the southwestern and southeastern United States, and were predicated on mid-1990 plant start-up. Estimates of system energy generation and balanceof-system cost were developed. These estimates

L. E. Stoddard; S. L. Levy

1984-01-01

94

SYSTEMIC DOPPLER BASED AERIAL TARGET TRACKING Felix Totir1  

E-print Network

, forming a multi-static radar configuration. The central idea is to make use of the bi-static Doppler shift measurements, we will address the multi-target/multi-sensor association and tracking problem with only Doppler

Boyer, Edmond

95

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

96

University of Central Florida Department of Communication Sciences and Disorders  

E-print Network

University of Central Florida Department of Communication Sciences and Disorders Ph.D. in Education Communication Sciences and Disorders Track Language and Literacy Companion to the Ph.D. in Education Handbook Dr this track. Program Description The University of Central Florida (UCF) Department of Communication Sciences

Wu, Shin-Tson

97

Five-Year Outcomes in Kidney Transplant Patients Converted From Cyclosporine to Everolimus: The Randomized ZEUS Study.  

PubMed

ZEUS study was an open-label, 12-month, multicenter study in which 300 de novo kidney transplant recipients were randomized to continue receiving cyclosporine (CsA) or convert to everolimus at 4.5 months posttransplant. Five-year follow-up data were available for 245/269 patients (91.1%) who completed the core 12-month study (123 everolimus, 109 CsA). At 5 years, adjusted estimated GFR was 66.2?mL/min/1.73?m(2) with everolimus versus 60.9?mL/min/1.73?m(2) with CsA; the mean difference was 5.3?mL/min/1.73?m(2) in favor of everolimus (95% CI 2.4, 8.3; p?

Budde, K; Lehner, F; Sommerer, C; Reinke, P; Arns, W; Eisenberger, U; Wüthrich, R P; Mühlfeld, A; Heller, K; Porstner, M; Veit, J; Paulus, E-M; Witzke, O

2015-01-01

98

VISUAL INSPECTION OF RAILROAD TRACKS PAVEL BABENKO  

E-print Network

VISUAL INSPECTION OF RAILROAD TRACKS by PAVEL BABENKO M.S. University of Central Florida, 2006 for measurement of rail gauge, and reliable identification and localization of structural defects in railroad in the panorama buffer. We employ the method which detects railroad crossings or forks in the panorama buffer

Central Florida, University of

99

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

100

The minitrack tracking function description, volume 1  

NASA Technical Reports Server (NTRS)

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

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

1973-01-01

101

Sex-Offender Tracking  

MedlinePLUS

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

102

Study of charged—current ep interactions at Q 2 >200 GeV 2 with the ZEUS detector at HERA  

Microsoft Academic Search

Deep inelastic charged-current reactions have been studied ine\\u000a +\\u000a p ande\\u000a ?\\u000a p collisions at a center of mass energy of about 300GeV in the kinematic regionQ\\u000a 2>200GeV2 andx>0.006 using the ZEUS detector at HERA. The integrated cross sections forQ\\u000a 2>200GeV2 are found to be $$\\\\sigma _{e^ + p \\\\to \\\\bar \\\

M. Derrick; D. Krakauer; S. Magill; D. Mikunas; B. Musgrave; J. R. Okrasinski; J. Repond; R. Stanek; R. L. Talaga; H. Zhang; M. C. K. Mattingly; P. Antonioli; G. Bari; M. Basile; L. Bellagamba; D. Boscherini; A. Bruni; G. Bruni; P. Bruni; G. Cara Romeo; G. Castellini; L. Cifarelli; F. Cindolo; A. Contin; M. Corradi; I. Gialas; P. Giusti; G. Iacobucci; G. Laurenti; G. Levi; A. Margotti; T. Massam; R. Nania; F. Palmonari; A. Pesci; A. Polini; G. Sartorelli; Y. Zamora Garcia; A. Zichichi; C. Amelung; A. Bornheim; J. Crittenden; R. Deffner; T. Doeker; M. Eckert; L. Feld; A. Frey; M. Geerts; M. Grothe; H. Hartmann; K. Heinloth; L. Heinz; E. Hilger; H.-P. Jakob; U. F. Katz; S. Mengel; E. Paul; M. Pfeiffer; Ch. Rembser; D. Schramm; J. Stamm; R. Wedemeyer; S. Campbell-Robson; A. Cassidy; W. N. Cottingham; N. Dyce; B. Foster; S. George; M. E. Hayes; G. P. Heath; H. F. Heath; D. Piccioni; D. G. Roff; R. J. Tapper; R. Yoshida; M. Arneodo; R. Ayad; M. Capua; A. Garfagnini; L. Iannotti; M. Schioppa; G. Susinno; A. Caldwell; N. Cartiglia; Z. Jing; W. Liu; J. A. Parsons; S. Ritz; F. Sciulli; P. B. Straub; L. Wai; S. Yang; Q. Zhu; P. Borzemski; J. Chwastowski; A. Eskreys; Z. Jakubowski; M. B. Przybycie?; M. Zachara; L. Zawiejski; L. Adamczyk; B. Bednarek; K. Jele?; D. Kisielewska; T. Kowalski; E. Rulikowska-Zar?bska; L. Suszycki; J. Zaj?c; Z. Duli?ski; A. Kota?ski; G. Abbiendi; L. A. T. Bauerdick; U. Behrens; H. Beier; J. K. Bienlein; G. Cases; O. Deppe; K. Desler; G. Drews; M. Flasi?ski; D. J. Gilkinson; C. Glasman; P. Göttlicher; J. Große-Knetter; T. Haas; W. Hain; D. Hasell; H. Heßling; Y. Iga; K. F. Johnson; P. Joos; M. Kasemann; R. Klanner; W. Koch; U. Kötz; H. Kowalski; J. Labs; A. Ladage; B. Löhr; M. Löwe; D. Lüke; J. Mainusch; O. Ma?czak; J. Milewski; T. Monteiro; J. S. T. Ng; D. Notz; K. Ohrenberg; K. Piotrzkowski; M. Roco; M. Rohde; J. Roldán; U. Schneekloth; W. Schulz; F. Selonke; B. Surrow; E. Tassi; T. Voß; D. Westphal; G. Wolf; U. Wollmer; C. Youngman; W. Zeuner; H. J. Grabosch; A. Kharchilava; S. M. Mari; A. Meyer; S. Schlenstedt; N. Wulff; G. Barbagli; E. Gallo; P. Pelfer; G. Maccarrone; S. De Pasquale; L. Votano; A. Bamberger; S. Eisenhardt; T. Trefzger; S. Wölfle; J. T. Bromley; N. H. Brook; P. J. Bussey; A. T. Doyle; D. H. Saxon; L. E. Sinclair; M. L. Utley; A. S. Wilson; A. Dannemann; U. Holm; D. Horstmann; R. Sinkus; K. Wick; B. D. Burow; L. Hagge; E. Lohrmann; G. Poelz; W. Schott; F. Zetsche; T. C. Bacon; N. Brümmer; I. Butterworth; V. L. Harris; G. Howell; B. H. Y. Hung; L. Lamberti; K. R. Long; D. B. Miller; N. Pavel; A. Prinias; J. K. Sedgbeer; D. Sideris; A. F. Whitfield; U. Mallik; M. Z. Wang; S. M. Wang; J. T. Wu; P. Cloth; D. Filges; S. H. An; G. H. Cho; B. J. Ko; S. B. Lee; S. W. Nam; H. S. Park; S. K. Park; S. Kartik; H.-J. Kim; R. R. McNeil; W. Metcalf; V. K. Nadendla; F. Barreiro; J. P. Fernandez; R. Graciani; J. M. Hernández; L. Hervás; L. Labarga; M. Martinez; J. del Peso; J. Puga; J. Terron; J. F. de Trocóniz; F. Corriveau; D. S. Hanna; J. Hartmann; L. W. Hung; J. N. Lim; C. G. Matthews; P. M. Patel; M. Riveline; D. G. Stairs; M. St-Laurent; R. Ullmann; G. Zacek; T. Tsurugai; V. Bashkirov; B. A. Dolgoshein; A. Stifutkin; G. L. Bashindzhagyan; P. F. Ermolov; L. K. Gladilin; Yu. A. Golubkov; V. D. Kobrin; I. A. Korzhavina; V. A. Kuzmin; O. Yu. Lukina; A. S. Proskuryakov; A. A. Savin; L. M. Shcheglova; A. N. Solomin; N. P. Zotov; M. Botje; F. Chlebana; J. Engelen; M. de Kamps; P. Kooijman; A. Kruse; A. van Sighem; H. Tiecke; W. Verkerke; J. Vossebeld; M. Vreeswijk; L. Wiggers; E. de Wolf; R. van Woudenberg; D. Acosta; B. Bylsma; L. S. Durkin; J. Gilmore; C. Li; T. Y. Ling; P. Nylander; I. H. Park; T. A. Romanowski; D. S. Bailey; R. J. Cashmore; A. M. Cooper-Sarkar; R. C. E. Devenish; N. Harnew; M. Lancaster; L. Lindemann; J. D. McFall; C. Nath; V. A. Noyes; A. Quadt; J. R. Tickner; H. Uijterwaal; R. Walczak; D. S. Waters; F. F. Wilson; T. Yip; A. Bertolin; R. Brugnera; R. Carlin; F. Dal Corso; M. De Giorgi; U. Dosselli; S. Limentani; M. Morandin; M. Posocco; L. Stanco; R. Stroili; C. Voci; F. Zuin; J. Bulmahn; R. G. Feild; B. Y. Oh; J. J. Whitmore; G. D’Agostini; G. Marini; A. Nigro; J. C. Hart; N. A. McCubbin; T. P. Shah; E. Barberis; T. Dubbs; C. Heusch; M. Van Hook; W. Lockman; J. T. Rahn; H. F.-W. Sadrozinski; A. Seiden; D. C. Williams; J. Biltzinger; R. J. Seifert; O. Schwarzer; A. H. Walenta; H. Abramowicz; G. Briskin; S. Dagan; A. Levy; J. I. Fleck; M. Inuzuka; T. Ishii; M. Kuze; S. Mine; M. Nakao; I. Suzuki; K. Tokushuku; K. Umemori; S. Yamada; Y. Yamazaki; M. Chiba; R. Hamatsu; T. Hirose; K. Homma; S. Kitamura; T. Matsushita; K. Yamauchi; R. Cirio; M. Costa; M. I. Ferrero; S. Maselli; C. Peroni; R. Sacchi; A. Solano; A. Staiano; M. Dardo; D. C. Bailey; F. Benard; M. Brkic; C.-P. Fagerstroem; G. F. Hartner; K. K. Joo

1996-01-01

103

Q2-evolution of parton densities at small x values. Effective scale for combined H1 and ZEUS F2 data  

E-print Network

We use the Bessel-inspired behavior of the structure function F2 at small x, obtained for a flat initial condition in the DGLAP evolution equations. We fix the scale of the coupling constant, which eliminates the singular part of anomalous dimesnions at the next-to-leading order of approximation. The approach together with the "frozen" and analytic modifications of the strong coupling constant is used to study the precise combined H1 and ZEUS data for the structure function F2 published recently.

A. V. Kotikov; B. G. Shaikhatdenov

2014-02-18

104

Good features to track  

Microsoft Academic Search

No feature-based vision system can work until good features can be identified and tracked from frame to frame. Although tracking itself is by and large a solved problem, selecting features that can be tracked well and correspond to physical points in the world is still an open problem. We propose a feature selection criterion that is optimal by construction because

Jianbo Shi; C. Toamsi

1994-01-01

105

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

106

Tracking Groups of People  

Microsoft Academic Search

A computer vision system for tracking multiple people in relatively unconstrained environments is described. Tracking is performed at three levels of abstraction: regions, people and groups. A novel, adaptive background subtraction method that combines color and gradient information is used to cope with shadows and unreliable color cues. People are tracked through mutual occlusions as they form groups and separate

Stephen J. Mckenna; Sumer Jabri; Zoran Duric; Azriel Rosenfeld; Harry Wechsler

2000-01-01

107

Introduction Object Tracking  

E-print Network

Tracking Motivation Traffic information Reduce urban transportation industry costs Future: Develop;Theory ­ Segmentation Noise minimization Gaussian Blur Linear Convolution Filter #12;Theory considered tracked Occlusion [ ], 1,2,...,10g h #12;Theory ­ Vehicle Tracking Prediction Kalman Filter

Anderson, Charles H.

108

Measuring the Performance of Beat Tracking Algorithms Using a Beat Error Histogram  

Microsoft Academic Search

We present a new evaluation method for measuring the performance of musical audio beat tracking systems. Central to our method is a novel visualization, the beat error histogram, which illustrates the metrical relationship between two qausi-peri- odic sequences of time instants: the output of beat tracking system and a set of ground truth annotations. To quantify beat tracking performance we

Matthew E. P. Davies; Norberto Degara; Mark D. Plumbley

2011-01-01

109

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

110

Applications of high frequency radar for emergency response in the coastal ocean: utilization of the Central Gulf of Mexico Ocean Observing System during the Deepwater Horizon oil spill and vessel tracking  

Microsoft Academic Search

The value of surface current data from SeaSonde high frequency radars (HFR), operated by the Central Gulf of Mexico Ocean Observing System (CenGOOS), to NOAA's Deepwater Horizon (DwH) oil spill response is demonstrated. The national integration of HFR data, undertaken as part of the Integrated Ocean Observing System, allowed NOAA to seamlessly utilize the CenGOOS data in giving guidance, throughout

Stephan D. Howden; Don Barrick; Hector Aguilar

2011-01-01

111

SILEX acquisition and tracking sensors  

NASA Astrophysics Data System (ADS)

This paper describes the Acquisition Sensor Detection Unit (ASDU) and the Tracking Sensor Detection Unit (TSDU) developed by Sira Ltd to be flown in the European Space Agency's SILEX (Semi-conductor Inter satellite Link Experiment) terminals. These units were designed, manufactured and qualified by Sira under contract to Matra Marconi Space. Stringent vibration, thermal stability and video waveform noise and timing specifications were critical elements in the design. The ASDU consists of an optical head containing a 385 X 288 CCD and video buffer, and separate electronics box containing clock decoding electronics, CCD clock drivers and video amplifiers. The ASDU operates at a frame rate of 33 or 135 Hz and its noise performance allows the brightest pixel to be detected with an accuracy of +/- 0.5 pixel for input powers in the range 9 - 55 pW (33 Hz) or 16 - 240 pW (135 Hz) during acquisition. Using the ASDU signal, the SILEX pointing, acquisition and tracking system controls the pointing mirrors to centralize the beam, at which point it falls within the smaller TSDU field of view. The TSDU comprises a single 480 g unit containing a 43 mm focal length lens, a 14 X 14 CCD, and clock receiver and video amplifier electronics. During tracking the central 4 CCD pixels are used as a quadrant detector, and the TSDU has demonstrated a noise equivalent angle of 2.7 (mu) rad (1 (sigma) half cone, 180 pW optical input power) at a frame rate of 8 kHz.

Cockshott, Robert A.; Purll, David J.

1995-04-01

112

Sea Turtle Satellite Tracking  

NSDL National Science Digital Library

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

113

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.

114

Tracking Small Artists  

NASA Astrophysics Data System (ADS)

Tracks of small animals are important in environmental surveillance, where pattern recognition algorithms allow species identification of the individuals creating tracks. These individuals can also be seen as artists, presented in their natural environments with a canvas upon which they can make prints. We present tracks of small mammals and reptiles which have been collected for identification purposes, and re-interpret them from an esthetic point of view. We re-classify these tracks not by their geometric qualities as pattern recognition algorithms would, but through interpreting the 'artist', their brush strokes and intensity. We describe the algorithms used to enhance and present the work of the 'artists'.

Russell, James C.; Klette, Reinhard; Chen, Chia-Yen

115

NorTRACK TM product tracking system—development and implementation  

NASA Astrophysics Data System (ADS)

This paper presents the experience gained by developers and users with implementation and operation of NorTRACK TM, a real-time computerized product tracking system. A Programmable Logic Controller (PLC) collects and transfers data in real time to NorTRACK's Oracle TM database on a Windows NT TM server network. After extensive development and Beta testing at MDS Nordion's Canadian Irradiation Centre in Montreal, Canada, NorTRACK was installed in January 1997 with a new irradiation facility in Ethicon Endo-Surgery Inc.'s Albuquerque plant in the United States. NorTRACK communicates with the irradiator control and safety system, the plant's central manufacturing database, an innovative pallet staging and tote loading robot, and an automated dosimetry reading system. This integrated system allows the sterilization facility to monitor the irradiator operation and the flow of many products, through varied processing modes, continuously and reliably. As a result of operating with NorTRACK, both MDS Nordion's CIC facility and the Endo-Surgery manufacturing site, are beginning to realize unique benefits in their respective operations. MDS Nordion is also initiating several future product enhancements and additional productivity modules. This paper describes the NorTRACK system, the various stages of the development project and Beta tests, and the experience of the users to date in their operations.

Gibson, W.; Veselovsky, P.

1999-06-01

116

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

Federal Register 2010, 2011, 2012, 2013, 2014

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

2012-06-06

117

Solar tracking device  

Microsoft Academic Search

An improved solar tracking arrangement is provided for directing a solar energy collector to face the sun. An electrical control mechanism is provided to detect misalignment of the collector as the sun traverses in relative movement across the sky. When the misalignment exceeds an adjustable limit of tolerance, the tracking system moves the collector to an orientation slightly in advance

M. E. Dorian; D. H. Nelson

1980-01-01

118

Incentives from Curriculum Tracking  

ERIC Educational Resources Information Center

Curriculum tracking creates incentives in the years before its start, and we should therefore expect test scores to be higher during those years. I find robust evidence for incentive effects of tracking in the UK based on the UK comprehensive school reform. Results from the Swedish comprehensive school reform are inconclusive. Internationally, I…

Koerselman, Kristian

2013-01-01

119

Tracks and Tools  

Microsoft Academic Search

Recent discoveries in the Laetolil beds at Laetoli in northern Tanzania have revealed hominid tracks made by three individuals in a bed of cemented volcanic ash. The tracks extend for a distance of 27 m and indicate a fully upright, bipedal gait with weight distribution similar to that of modern man. A single trail proceeds alongside a dual trail in

Mary D. Leakey

1981-01-01

120

2 Tracks for Faculty  

ERIC Educational Resources Information Center

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

Wilson, Robin

2012-01-01

121

Airborne tracking sunphotometer  

NASA Technical Reports Server (NTRS)

An airborne tracking sunphotometer, mounted on the outside top surface of an aircaft has been developed to provide unresricted viewing of the sun. This instrument will substantially increase the data that scientists can gather for atmospheric studies. The instrument has six wavelength channels and an automatic data gathering system. The instrument's optical features, tracking capability, mechanical features, and data gathering system are described.

Matsumoto, Tak; Russell, Philip; Mina, Cesar; Van Ark, William; Banta, Victor

1987-01-01

122

Photometer Tracks The Sun  

NASA Technical Reports Server (NTRS)

Airborne Sun-tracking photometer enables observations of Sun during much greater portion of flights than previously possible, without special maneuvers of airplane. Instrument occupies dome atop airplane. Fiberglass dome protects photometer and rotates to aim photometer in azimuth and elevation to track Sun. Provides controlled environment for instrument, including mechanical and electronic parts. Instrument calibrated without removing it from airplane.

Matsumoto, Tak; Mina, Cesar; Russell, Philip; Van Ark, William

1988-01-01

123

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

124

UWB Tracking Software Development  

NASA Technical Reports Server (NTRS)

An Ultra-Wideband (UWB) two-cluster Angle of Arrival (AOA) tracking prototype system is currently being developed and tested at NASA Johnson Space Center for space exploration applications. This talk discusses the software development efforts for this UWB two-cluster AOA tracking system. The role the software plays in this system is to take waveform data from two UWB radio receivers as an input, feed this input into an AOA tracking algorithm, and generate the target position as an output. The architecture of the software (Input/Output Interface and Algorithm Core) will be introduced in this talk. The development of this software has three phases. In Phase I, the software is mostly Matlab driven and calls C++ socket functions to provide the communication links to the radios. This is beneficial in the early stage when it is necessary to frequently test changes in the algorithm. Phase II of the development is to have the software mostly C++ driven and call a Matlab function for the AOA tracking algorithm. This is beneficial in order to send the tracking results to other systems and also to improve the tracking update rate of the system. The third phase is part of future work and is to have the software completely C++ driven with a graphics user interface. This software design enables the fine resolution tracking of the UWB two-cluster AOA tracking system.

Gross, Julia; Arndt, Dickey; Ngo, Phong; Phan, Chau; Dusl, John; Ni, Jianjun; Rafford, Melinda

2006-01-01

125

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

126

Reducing antenna mechanical noise in precision spacecraft tracking  

Microsoft Academic Search

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

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

2008-01-01

127

Reducing Antenna Mechanical Noise in Precision Doppler Tracking  

Microsoft Academic Search

Precision Doppler tracking of deep-space probes is central to spacecraft naviga- tion and many radio science investigations. The most sensitive Doppler observa- tions to date have been taken using the NASA\\/JPL Deep Space Network (DSN) antenna DSS 25—a 34-m-diameter beam-waveguide station especially instrumented with simultaneous X-band (?8.4-GHz) and Ka-band (?32-GHz) links and tropo- spheric scintillation calibration equipment—tracking the Cassini spacecraft.

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

2006-01-01

128

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

Microsoft Academic Search

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

Paul J. Brewer; Charles R. Plott

1996-01-01

129

Energy Tracking Software Platform  

SciTech Connect

Acceleration has created an interactive energy tracking and visualization platform that supports decreasing electric, water, and gas usage. Homeowners have access to tools that allow them to gauge their use and track progress toward a smaller energy footprint. Real estate agents have access to consumption data, allowing for sharing a comparison with potential home buyers. Home builders have the opportunity to compare their neighborhood's energy efficiency with competitors. Home energy raters have a tool for gauging the progress of their clients after efficiency changes. And, social groups are able to help encourage members to reduce their energy bills and help their environment. EnergyIT.com is the business umbrella for all energy tracking solutions and is designed to provide information about our energy tracking software and promote sales. CompareAndConserve.com (Gainesville-Green.com) helps homeowners conserve energy through education and competition. ToolsForTenants.com helps renters factor energy usage into their housing decisions.

Ryan Davis; Nathan Bird; Rebecca Birx; Hal Knowles

2011-04-04

130

Tracking Polar Bears  

NSDL National Science Digital Library

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

Foundation, Wgbh E.

2008-01-17

131

Predictive visual tracking  

NASA Astrophysics Data System (ADS)

Due to delays in image acquisition and processing, prediction is a critical factor for successful visual tracking of moving objects (both for humans and for vision machines). This paper explores some alternative techniques for predicting object motion for the purpose of tracking with an active camera system. In particular, one of our goals is to develop a system that will track an object undergoing `random' motion quite well, but that will track much better (at higher speeds with less lag) if the object settles into a periodic motion of some kind. Rather than identify parameters for specific signal models to accomplish this, we propose to use a finite set of previous joint states for the signal model. The advantages and problems associated with this approach are discussed. Results of experiments using different prediction algorithms with TRICLOPS, a high-performance active vision system, are also presented.

Wavering, Albert J.; Lumia, Ronald

1993-08-01

132

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....

133

Silence tracking radar  

Microsoft Academic Search

A high performance linear FMCW radar sensor and its implementation as tracking radar are presented. The radar has been built with an all-solid state transmitter with 200 mw output power and two channel receivers with 9 dB noise figure. Tracking range of more than 10 km, angle error of better than 0.5 mrad and range error of better than 5

Zhang Guanjie; Guo Min; Bao Yongjie

2001-01-01

134

Airship attitude tracking system  

Microsoft Academic Search

The attitude tracking control problem for an airship with parameter uncertainties and external disturbances was considered\\u000a in this paper. The mathematical model of the airship attitude is a multi-input\\/multi-output uncertain nonlinear system. Based\\u000a on the characteristics of this system, a design method of robust output tracking controllers was adopted based on the upper-bounds\\u000a of the uncertainties. Using the input\\/output feedback

Xiao-liang Wang; Xue-xiong Shan

2006-01-01

135

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

136

Robust superpixel tracking.  

PubMed

While numerous algorithms have been proposed for object tracking with demonstrated success, it remains a challenging problem for a tracker to handle large appearance change due to factors such as scale, motion, shape deformation, and occlusion. One of the main reasons is the lack of effective image representation schemes to account for appearance variation. Most of the trackers use high-level appearance structure or low-level cues for representing and matching target objects. In this paper, we propose a tracking method from the perspective of midlevel vision with structural information captured in superpixels. We present a discriminative appearance model based on superpixels, thereby facilitating a tracker to distinguish the target and the background with midlevel cues. The tracking task is then formulated by computing a target-background confidence map, and obtaining the best candidate by maximum a posterior estimate. Experimental results demonstrate that our tracker is able to handle heavy occlusion and recover from drifts. In conjunction with online update, the proposed algorithm is shown to perform favorably against existing methods for object tracking. Furthermore, the proposed algorithm facilitates foreground and background segmentation during tracking. PMID:24808336

Fan Yang; Huchuan Lu; Ming-Hsuan Yang

2014-04-01

137

Cicada Central  

NSDL National Science Digital Library

This site, hosted by University of Connecticut, "is designed to be a center for the exchange of scientific information concerning cicadas of the world." This Cicada Central website links to reprints for scientific literature concerning cicadas, a list of cicada researchers from around the world, a list of world cicada tribes, and more.

Simon, Chris

138

Engineering Central  

NSDL National Science Digital Library

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

1999-01-01

139

Integrated photovoltaic central station conceptual design  

SciTech Connect

Black and Veatch has developed the conceptual designs of 100 MW photovoltaic central stations using fixed, one-axis tracking, and two-axis tracking flat plate and two-axis tracking high concentration collectors. Designs were established for sites in the southwestern and southeastern United States, and were predicated on mid-1990 plant start-up. Estimates of system energy generation and balanceof-system cost were developed. These estimates and levelized cost of energy targets were then used to establish cost ceilings and efficiency requirements for photovoltaic laminates (unframed modules) and concentrator arrays. Based on expected laminate cost and efficiency values, all four system types appear to be economically viable in the Southwest. Only fixed and one-axis tracking collectors appear to be viable for the Southeast site.

Stoddard, L.E.; Levy, S.L.

1984-05-01

140

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

141

Mechanical design and finite element analysis of the SDC central calorimeter  

NASA Astrophysics Data System (ADS)

When designing scintillating calorimeters for the study of particle interactions resulting from colliding beams, a primary goal is to instrument 100 percent of the available solid angle. In pursuit of this goal the challenge for mechanical designers is to minimize the amount of structural mass and still maintain acceptable engineering standards in the design. Argonne National Laboratory's involvement in the design of a central calorimeter for the SSC started in 1989. Our first proposal was to design a depleted uranium scintillator calorimeter similar to the ZEUS detector presently installed at the HERA electron-proton collider in Hamburg, Germany. Argonne was involved at the time in final assembly of modules for ZEUS that were designed and constructed at ANL. Due to the cost of using depleted uranium, lead was chosen as the absorber material. In collaboration with the Westinghouse Science and Technology Center in Pittsburgh, Pennsylvania, a program was launched to optimize the use of lead or lead alloys in the construction of the calorimeter. A cast lead design for the calorimeter evolved from this effort. Subsequent to this design, further pressure to reduce costs have now dictated a design which contains lead only in the electromagnetic sections of the calorimeter. The finite element analysis we will present here was done using lead for the HAD1 section of the barrel.

Guarino, V.; Hill, N. F.; Nasiatka, J.; Hoecker, D. A.; Hordubay, T. D.; Scherbarth, D. W.; Swensrud, R. L.

1992-03-01

142

Tracks to therapy.  

PubMed

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". PMID:12025838

Katz, R; Cucinotta, F A

1999-06-01

143

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

144

On sonobuoy placement for submarine tracking  

NASA Astrophysics Data System (ADS)

This paper addresses the problem of detecting and tracking an unknown number of submarines in a body of water using a known number of moving sonobuoys. Indeed, we suppose there are N submarines collectively maneuvering as a weakly interacting stochastic dynamical system, where N is a random number, and we need to detect and track these submarines using M moving sonobuoys. These sonobuoys can only detect the superposition of all submarines through corrupted and delayed sonobuoy samples of the noise emitted from the collection of submarines. The signals from the sonobuoys are transmitted to a central base to analyze, where it is required to estimated how many submarines there are as well as their locations, headings, and velocities. The delays induced by the propagation of the submarine noise through the water mean that novel historical filtering methods need to be developed. We summarize these developments within and give initial results on a simplified example.

Kouritzin, Michael A.; Ballantyne, David J.; Kim, Hyukjoon; Hu, Yaozhong

2005-05-01

145

National Environmental Performance Track  

NSDL National Science Digital Library

The US Environmental Protection Agency (EPA) has launched the new National Environmental Performance Track program, designed to "reward companies which exceed minimum regulatory requirements and take extra steps to reduce and prevent pollution." Potential award recipients include private and public companies or facilities that have performed beyond legal environmental/ health compliance requirements. The National Environmental Performance Track homepage briefly describes the new program, including requirements, benefits, and current participants. Although some sections of the site are still under construction, most of the critical information is provided here, including application forms. Note that companies/ facilities interested in attaining special Charter Membership status have until September 30 to apply.

146

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

147

7.RP Track Practice  

NSDL National Science Digital Library

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Angel and Jayden were at track practice. The track is $\\frac25$ kilometers around. Angel ran 1 lap in 2 minutes. Jayden ran 3 laps in 5 minutes. How ma...

148

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

149

GEOS-3 Doppler difference tracking  

NASA Technical Reports Server (NTRS)

The Doppler difference method as applied to track the GEOS 3 spacecraft is discussed. In this method a pair of 2 GHz ground tracking stations simultaneously track a spacecraft beacon to generate an observable signal in which bias and instability of the carrier frequency cancel. The baselines are formed by the tracking sites at Bermuda, Rosman, and Merritt Island. Measurements were made to evaluate the effectiveness of the Doppler differencing procedure in tracking a beacon target with the high dynamic rate of the GEOS 3 orbit. Results indicate the precision of the differenced data to be at a level comparable to the conventional precise two way Doppler tracking.

Rosenbaum, B.

1977-01-01

150

4. VIEW NORTHEAST WEST PORTAL, SHOWING FORMER TRACK ALIGNMENT AND ...  

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

4. VIEW NORTHEAST- WEST PORTAL, SHOWING FORMER TRACK ALIGNMENT AND ADJACENT NJ TURNPIKE VIADUCT. - National Docks Branch Bridge N.D.2F, Spans former Central Railroad of New Jersey , west of New Jersey Turnpike, north of Communipaw Avenue near Johnson Avenue, Jersey City, Hudson County, NJ

151

2. VIEW NORTHEAST DETAIL OF BRIDGE TRUSSES, NEW TRACK SHOWN ...  

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

2. VIEW NORTHEAST- DETAIL OF BRIDGE TRUSSES, NEW TRACK SHOWN ADJACENT TO BRIDGE. - National Docks Branch Bridge N.D.2F, Spans former Central Railroad of New Jersey , west of New Jersey Turnpike, north of Communipaw Avenue near Johnson Avenue, Jersey City, Hudson County, NJ

152

Tracking Systems for Multiple Smart Home Aaron S. Crandall  

E-print Network

system's goal is to determine the current number and location of individuals, as well as their identity location of the device to the central system. This has been accomplished using PDAs, cell phonesTracking Systems for Multiple Smart Home Residents Aaron S. Crandall acrandal@wsu.edu Diane J. Cook

Cook, Diane J.

153

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

154

1. Copy of Drawing, 'American Steel & Wire Co., Central ...  

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

1. Copy of Drawing, 'American Steel & Wire Co., Central Furnace Works -- Sketch of Plant Showing Tracks & Buildings, 1913, Revised 3/10/31.' Drawing courtesy United States Steel Corporation, Lorain, Ohio. Credit Berni Rich, Score Photographs, August 1979, for photos 1 through 4 and 7 through 11. - Central Furnaces, 2650 Broadway, east bank of Cuyahoga River, Cleveland, Cuyahoga County, OH

155

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.

156

Tracking Tyrannosaurus: Notes on Purported T. rex Tracks  

Microsoft Academic Search

Purported T. rex tracks (genus Tyrannosaurus) are rare and, if poorly preserved, difficult to identify or to distinguish with certainty from the tracks of hadrosaurs found in the same deposits. Six possible Tyrannosaurus tracks have been reported, five of which appear to be the right age, that is, Maastrichtian. However, at least two, including one that is pre-Maastrichtian, are interpreted

Martin Lockley; Paul R. Janke; Mike Triebold

2011-01-01

157

Understanding Adjacent Track Erasure in Discrete Track Media  

Microsoft Academic Search

We present a micromagnetic modeling analysis on recording performance, in particular adjacent track erasure (ATE), in discrete track media. We have compared the ATE performance between the continuous and discrete track media, and we have modeled two types of perpendicular media: one with zero intergranular exchange coupling and the other with moderate intergranular exchange coupling. We found that in the

Yuhui Tang; Xiaodong Che; Hyung Jai Lee; Jian-Gang Zhu

2008-01-01

158

Solar tracking by plants  

Microsoft Academic Search

Leaves of many desert and agricultural species have the ability to move diurnally, orienting perpendicular or parallel to the sun's direct rays. This phenomenon is widespread in many plant families and occurs in both C2 and C4 photosynthetic pathway plants. In the annual flora of desert communities, solar tracking becomes more frequent as the length of the growing season decreases.

T. Ehleringer; G. Forseth

2009-01-01

159

Solar Tracking by Plants  

Microsoft Academic Search

Leaves of many desert and agricultural species have the ability to move diurnally, orienting perpendicular or parallel to the sun's direct rays. This phenomenon is widespread in many plant families and occurs in both C3 and C4 photosynthetic pathway plants. In the annual flora of desert communities, solar tracking becomes more frequent as the length of the growing season decreases.

James Ehleringer; Irwin Forseth

1980-01-01

160

Visual Tracking & Particle Filters  

E-print Network

Visual Tracking & Particle Filters Patrick Pérez Irisa, Feb. 2012 #12; Definition attempt : on level of prior) Picked objects: video object manually selected, interest points (corners, blobs://www.robots.ox.ac.uk/~vgg/research/vgoogle/ #12; Why is it harder that it might seem? temporal variability of visual appearance low video

LeGland, François

161

Tracking Polar Bears  

USGS Multimedia Gallery

Movements of 9 satellite-collared adult female polar bears were tracked in February, 2010 by satellite telemetry. Bears were collared in 2007, 2008, and 2009 on the spring-time sea ice of the southern Beaufort Sea or on the autumn pack ice in 2009. Polar bear satellite telemetry data are shown with ...

2010-04-13

162

TRACKING Trounces Test Scores  

ERIC Educational Resources Information Center

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

Education Digest: Essential Readings Condensed for Quick Review, 2004

2004-01-01

163

Landmark tracking technology  

NASA Technical Reports Server (NTRS)

This paper summarizes the justification and technical approach of an experimental plan for landmark recognition and tracking from the Advanced Technology Laboratory (ATL). The primary experimental approach is that of near real-time pattern recognition by means of coherent optical techniques. An experiment development plan would lead to a flight test in 1981.

Welch, J. D.; Sivertson, W. E.; Wilson, R. G.

1975-01-01

164

Personal Tracking Charts  

MedlinePLUS

... HErBal SupplEMEnTS (milk thistle, st. john’s wort, garlic tablets, etc.) keeping track of my periods January February March april May June July august septeMber OctOber nOveMber DeceMber 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ...

165

RESEARCH TRACKING SYSTEM  

EPA Science Inventory

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

166

GPS Tracks Ground Deformation  

USGS Multimedia Gallery

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

167

Tracking Politics with POWER  

ERIC Educational Resources Information Center

Purpose: POWER is an ontology of political processes and entities. It is designed for tracking politicians, political organizations and elections, both in mainstream and social media. The aim of this paper is to propose a data model to describe political agents and their relations over time. Design/methodology/approach: The authors propose a data…

Moreira, Silvio; Batista, David S.; Carvalho, Paula; Couto, Francisco M.; Silva, Mario J.

2013-01-01

168

The central tracking detectors for D/O/  

SciTech Connect

Three types of drift chambers are being constructed for the Fermilab D/O/ experiment. The construction and readout of these chambers stress good spatial resolution, good two hit separation, and dE/dx. A 106 MHz FADC system with hardware zero suppression is being constructed to readout this system. 8 refs., 12 figs., 1 tab.

Clark, A.; Goozen, F.; Klopfenstein, C.; Kerth, L.T.; Loken, S.; Strovink, M.; Trippe, T.G.; Bantly, J.; Buchholz, D.; Claes, D.

1988-01-01

169

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.

Susanne Grimm

170

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

171

Track Fusion with Road Constraints  

Microsoft Academic Search

This paper is concerned with tracking of ground targets on roads and investigates possible ways to improve target state estimation via fusing a target's track with information about a road along which the target is believed to be traveling. A target track is estimated by a surveillance radar whereas a digital map provides the road network of a region under

Chun Yang; Erik Blasch

2007-01-01

172

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

173

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.

1997-01-01

174

Sonnet Central  

NSDL National Science Digital Library

Created by a dedicated sonnet aficionado, Sonnet Central is not intended for the scholar, per se, but for the reader, the Internaut with a weakness for poetry. The site contains a collection of English-language sonnets, grouped by period and region or by author, and modernized for contemporary readers. Pictures, contemporaneous critical works, a bibliography, and audio files of readings of selected poems complement the sonnets, some of which are maintained off-site (many at the University of Toronto). From Shakespeare to Wilfred Owen, selections from many well-known sonneteers are here alongside those of their less famous contemporaries.

175

Central pain.  

PubMed

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

176

49 CFR 213.63 - Track surface.  

Code of Federal Regulations, 2011 CFR

...Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION TRACK SAFETY STANDARDS Track Geometry § 213.63 Track surface. Each owner of the track to which this part applies shall maintain the surface of its...

2011-10-01

177

49 CFR 213.63 - Track surface.  

Code of Federal Regulations, 2010 CFR

...Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION TRACK SAFETY STANDARDS Track Geometry § 213.63 Track surface. Each owner of the track to which this part applies shall maintain the surface of its...

2010-10-01

178

49 CFR 213.63 - Track surface.  

Code of Federal Regulations, 2012 CFR

...Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION TRACK SAFETY STANDARDS Track Geometry § 213.63 Track surface. Each owner of the track to which this part applies shall maintain the surface of its...

2012-10-01

179

49 CFR 213.63 - Track surface.  

Code of Federal Regulations, 2013 CFR

...Transportation (Continued) FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION TRACK SAFETY STANDARDS Track Geometry § 213.63 Track surface. (a) Except as provided in paragraph (b) of this section, each track owner shall...

2013-10-01

180

Track counting and the blots.  

PubMed

Track detectors are very useful devices for alpha particle dosimetry. Alpha particle tracks are registered on the detector's surface. The registered track density is proportional to the dose. When the dose is low the greatest effect on the total error of dose assessment has a Poisson distribution (random error). When the dose is high, the greatest contribution to the total error is the effect of track overlapping (systemic error). This paper describes how to solve the problem of overlapping tracks when a computer aided image analyser is used. The formulae presented in this paper were proven in the international calibration programme run by NRPB and EU. PMID:12382718

Kluszczy?ski, D; Kami?ski, Z

2002-01-01

181

Marine Animal Tracking  

NSDL National Science Digital Library

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

Engineering K-Ph.D. Program,

182

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

183

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

184

Fast tracking hospital construction.  

PubMed

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

Quirk, Andrew

2013-03-01

185

04/19/2007 08:20 PMDHL: Track details Page 1 of 2http://track.dhl-usa.com/TrackRslts.asp?nav=TrackRslt  

E-print Network

04/19/2007 08:20 PMDHL: Track details Page 1 of 2http://track.dhl-usa.com/TrackRslts.asp're here to help! Contact DHL #12;04/19/2007 08:20 PMDHL: Track details Page 2 of 2http://track.dhl-usa.com/TrackRslts.asp

Bartholdi III, John J.

186

04/20/2006 07:10 AMDHL: Track details Page 1 of 2http://track.dhl-usa.com/TrackRslts.asp?nav=TrackBynumber  

E-print Network

04/20/2006 07:10 AMDHL: Track details Page 1 of 2http://track.dhl-usa.com/TrackRslts.asp and will be provided on invoice. #12;04/20/2006 07:10 AMDHL: Track details Page 2 of 2http://track.dhl-usa.com/TrackRslts.asp

Bartholdi III, John J.

187

04/17/2007 10:10 PMDHL: Track details Page 1 of 2http://track.dhl-usa.com/TrackRslts.asp?nav=TrackRslt  

E-print Network

04/17/2007 10:10 PMDHL: Track details Page 1 of 2http://track.dhl-usa.com/TrackRslts.asp're here to help! Contact DHL #12;04/17/2007 10:10 PMDHL: Track details Page 2 of 2http://track.dhl-usa.com/TrackRslts.asp

Bartholdi III, John J.

188

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

189

NEKF IMM tracking algorithm  

NASA Astrophysics Data System (ADS)

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

Owen, Mark W.; Stubberud, Allen R.

2004-01-01

190

NEKF IMM tracking algorithm  

NASA Astrophysics Data System (ADS)

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

Owen, Mark W.; Stubberud, Allen R.

2003-12-01

191

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 ...

192

Putting Off-Track Youths Back on Track to College  

ERIC Educational Resources Information Center

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

Steinberg, Adria; Allen, Lili

2011-01-01

193

A new technique for determining charge and momentum of electrons and positrons using calorimetry and silicon tracking  

SciTech Connect

We describe the application of a new methods for the determination of charge and track parameters for electrons and positrons in both central (pseudo-rapidity 0 < |{eta}| < 1.2) and forward (pseudo- rapidity 1.2 < |{eta}| < 2.3) regions at CDF. The method uses the shower centroid position in the calorimeter in combination with a track in the inner silicon vertex detector. The use of the central tracking chamber is not required. A comparison of the shower centroid in the calorimeter, with the extrapolated silicon vertex detector track determines the electron sign. This technique has been used to measure the W asymmetry in CDF in regions beyond the pseudo-rapidity coverage of the central tracking chamber. Application to other Physics analyses in current collider experiments at the Tevatron and in future high luminosity experiments at the LHC are discussed. 5 refs., 5 figs., 1 tab.

Fan, Q.; Bodek, A. [Rochester Univ., NY (United States). Dept. of Physics and Astronomy]|[Fermi National Accelerator Lab., Batavia, IL (United States)

1996-12-01

194

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

195

Human detection and tracking  

NASA Astrophysics Data System (ADS)

This paper presents a method to segment moving human bodies. A self-adaptive background model is used to update the background image(so-called reference image). By calculating the Euclidean distance of corresponding points in the current and background image, we can check out the foreground objects. And the shadow can be detected and removed according to the characteristics of the shadow regions shown in HSV space. Finally, target tracking is implemented by calculating the relativity of color histogram between the moving areas in two succeeding images.

Yu, Pengxian; Wei, Yaxun

2013-10-01

196

Tracking the GLOMR satellite  

NASA Technical Reports Server (NTRS)

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

Reiss, Keith W.; Oneil, Jason C.

1987-01-01

197

Playing Fraction Tracks  

NSDL National Science Digital Library

This interactive game, similar to "Fraction Game" (catalogued separately) allows two students an opportunity to think about how fractions are related to a unit whole, compare fractional parts of a whole, and find equivalent fractions. Two players move markers a total distance (forwards and backwards directions) that equals the random target fraction box, along their choice of seven parallel number line tracks, which are divided into different fractional parts. The goal is to move each of the seven markers to the right side of the game board before your opponent does. Instructions and discussion questions are given.

2011-01-01

198

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

199

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

200

Numerical methods for tracking interfaces  

SciTech Connect

An overview is given of special numerical methods for tracking discontinuous fronts and interfaces. These methods include: surface tracking methods based on connected marker points along the interface, volume-tracking methods that track the volume occupied by the solution regions bounded by the interfaces, and moving mesh methods where the underlying mesh is aligned and moved with the interface. The pros and cons of the current methods are discussed, and a new method is proposed that overcomes some of the difficulties encountered in approximating equations with multiply interacting interfaces.

Hyman, J.M.

1983-01-01

201

Cassini Archive Tracking System  

NASA Technical Reports Server (NTRS)

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

Conner, Diane; Sayfi, Elias; Tinio, Adrian

2006-01-01

202

Vertebrate Tracks in Pleistocene Eolian Sand-Sheet Deposits of Alaska  

NASA Astrophysics Data System (ADS)

Deformation structures interpreted as vertebrate hoof- and foot-tracks occur within upper-Pleistocene eolian sand-sheet deposits in the stabilized Kantishna sand sea of central Alaska and in the Nushagak lowland of southwestern Alaska. Exposures of tracks are generally limited to cross sections, which reveal concave-up deformation structures in which displacement of preexisting strata diminishes downward. Deposits in both areas contain tracks that are 6 to 16 cm in diameter and are divided by a central ridge, reflecting formation by artiodactyl (even-toed) ungulates. Larger (21-34 cm) tracks without a central ridge, observed in the Nushagak lowland, were formed by proboscideans, probably woolly mammoth. Large vertebrate tracks occur within irregularly stratified sand and silty sand that accumulated upon partially vegetated sand sheets, and within thin, even wind-ripple laminae of unvegetated sand sheets. The presence of tracks at multiple stratigraphic levels and preservation of roots and rhizocretions within the eolian deposits suggest that vegetated sand sheets may have formed a locally important grazing habitat for large herbivores during at least part of the last glaciation. Recognition that vertebrate tracks are preserved in eolian sand-sheet deposits, and in deposits of other environments as well, opens a new source of stratigraphic and paleoecological data to aid reconstruction of the vanished ecosystems of Beringia.

Lea, Peter D.

1996-03-01

203

Vehicle tracking systems  

SciTech Connect

Several systems have been developed to accomplish vehicle location. The systems consist of three types: Dead Reckoning, Satellite, and LORAN C. If the information is to be sent back to a central location, some type of radiocommunication system is needed. One can use the existing voice radio or add a radio system just for transmitting the data.

Schwalm, R.W.

1987-01-01

204

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

205

Estimation of track-soil interactions for autonomous tracked vehicles  

Microsoft Academic Search

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

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

1997-01-01

206

Conference Track: Industrial Application Track: Situation Assessment and Awareness  

E-print Network

Conference Track: Industrial Application Track: Situation Assessment and Awareness Business Sectors: logistics, military, financial, crisis management An Application of Semantic Web Technologies to Situation the domain of supply logistics is presented along with a discussion of the challenges encountered in using

Kokar, Mieczyslaw M.

207

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

208

Solid State Nuclear Track Detectors--I: Track Characteristics and Formation Mechanisms.  

ERIC Educational Resources Information Center

Heavily ionizing charged particles produce radiation damage tracks in a wide variety of insulating materials. The experimental properties of these tracks and track recorders are described. The mechanisms by which the tracks are produced are discussed. (Author/KR)

Lal, Nand

1991-01-01

209

Microcontroller based solar tracking system  

Microsoft Academic Search

Solar energy is very important means of expanding renewable energy resources. In this paper is described the design and construction of a microcontroller based solar panel tracking system. Solar tracking allows more energy to be produce because the solar array is able to remain aligned to the sun. The paper begins with presenting background theory in light sensors and stepper

A. Stjepanovic; S. Stjepanovic; F. Softic; Z. Bundalo

2009-01-01

210

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

211

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

212

Airborne ballistic camera tracking systems  

NASA Technical Reports Server (NTRS)

An operational airborne ballistic camera tracking system was tested for operational and data reduction feasibility. The acquisition and data processing requirements of the system are discussed. Suggestions for future improvements are also noted. A description of the data reduction mathematics is outlined. Results from a successful reentry test mission are tabulated. The test mission indicated that airborne ballistic camera tracking systems are feasible.

Redish, W. L.

1976-01-01

213

Precision tracking systems for sonobuoys  

Microsoft Academic Search

A system has been developed to track arrays consisting of several sonobuoys deployed for acoustic detection. This navigation technique can be used to track the position of any free-drifting hydrophones. The method, employing bottom-moored acoustic transponders, can provide relative hydrophone positions to within 20 meters. Ultimate geographical positioning is dependent on the accuracy of the primary navigation system available; satellite

R. Spindel; R. Porter

1974-01-01

214

Track Finder CMS. 12 , 3  

E-print Network

), FQPFMP 2006 ­ SP05, DAQ, Firmware 2007 - 2008 ­ , DAQ, DT, GMT, Firmware, 2009 ­ Firmware, , c 2010 ­ 7 , Firmware, Software 2011 ­ 7 , Firmware, Software Track Firmware: Firmware updates - Feb 04, Mar 22, Sep 15: - Implement all possible track combinations between DT

Titov, Anatoly

215

CONTRACT ADMINISTRATIVE TRACKING SYSTEM (CATS)  

EPA Science Inventory

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

216

Solar tracking system  

NASA Technical Reports Server (NTRS)

A solar tracker for a solar collector is described in detail. The collector is angularly oriented by a motor wherein the outputs of two side-by-side photodetectors are discriminated as to three ranges: a first corresponding to a low light or darkness condition; a second corresponding to light intensity lying in an intermediate range; and a third corresponding to light above an intermediate range, direct sunlight. The first output drives the motor to a selected maximum easterly angular position; the second enables the motor to be driven westerly at the Earth rotational rate; and the third output, the separate outputs of the two photodetectors, differentially controls the direction of rotation of the motor to effect actual tracking of the Sun.

White, P. R.; Scott, D. R. (inventors)

1981-01-01

217

Microencapsulated cell tracking  

PubMed Central

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

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

2013-01-01

218

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

219

Central Tendency () Central Tendency 1 / 11  

E-print Network

Central Tendency () Central Tendency 1 / 11 #12;Median is the middle score (50th percentile) Median are 4,5 Median = (1.3 + 1.4)/2 = 1.35. () Central Tendency 2 / 11 #12;Mean is the average score Given 5 (7 1) + (3 1) + (( 1) 1) + (2 1) + (( 6) 1)) = 6 + 2 2 + 1 7 = 0 () Central Tendency 3 / 11 #12;Mean

Busemeyer, Jerome R.

220

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

221

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

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

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

222

A foveated silicon retina for two-dimensional tracking  

Microsoft Academic Search

A silicon retina chip with a central foveal region for smooth-pursuit tracking and a peripheral region for saccadic target acquisition is presented. The foveal region contains a 9×9 dense array of large dynamic range photoreceptors and edge detectors. Two-dimensional direction of foveal motion is computed outside the imaging array. The peripheral region contains a sparse array of 19×17 similar, but

Ralph Etienne-Cummings; Jan Van der Spiegel; Paul Mueller; Mao-Zhu Zhang

2000-01-01

223

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

224

Expected track length estimation using track break statistics  

NASA Astrophysics Data System (ADS)

We consider the problem of estimating the performance of a system that tracks moving objects on the ground using airborne sensors. Expected Track Life (ETL) is a measure of performance that indicates the ability of a tracker to maintain track for extended periods of time. The most desirable method for computing ETL would involve the use of large sets of real data with accompanying truth. This accurately accounts for sensor artifacts and data characteristics, which are difficult to simulate. However, datasets with these characteristics are difficult to collect because the coverage area of the sensors is limited, the collection time is limited, and the number of objects that can realistically be truthed is also limited. Thus when using real datasets, many tracks are terminated because the objects leave the field of view or the end of the dataset is reached. This induces a bias in the estimation when the ETL is computed directly from the tracks. An alternative to direct ETL computation is the use of Markov-Chain models that use track break statistics to estimate ETL. This method provides unbiased ETL estimates from datasets much shorter than what would be required for direct computation. In this paper we extend previous work in this area and derive an explicit expression of the ETL as a function of track break statistics. An example illustrates the properties and advantages of the method.

Arambel, Pablo O.; Finn, Lucas I.

2012-06-01

225

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

226

49 CFR 213.359 - Track stiffness.  

Code of Federal Regulations, 2010 CFR

...compliance with the vehicle/track interaction safety limits and geometry requirements of this subpart. (b) Track shall have...compliance with the vehicle/track interaction safety limits and geometry requirements of this...

2010-10-01

227

49 CFR 213.359 - Track stiffness.  

Code of Federal Regulations, 2011 CFR

...compliance with the vehicle/track interaction safety limits and geometry requirements of this subpart. (b) Track shall have...compliance with the vehicle/track interaction safety limits and geometry requirements of this...

2011-10-01

228

49 CFR 213.359 - Track stiffness.  

Code of Federal Regulations, 2013 CFR

...compliance with the vehicle/track interaction safety limits and geometry requirements of this subpart. (b) Track shall have...compliance with the vehicle/track interaction safety limits and geometry requirements of this...

2013-10-01

229

49 CFR 213.359 - Track stiffness.  

Code of Federal Regulations, 2012 CFR

...compliance with the vehicle/track interaction safety limits and geometry requirements of this subpart. (b) Track shall have...compliance with the vehicle/track interaction safety limits and geometry requirements of this...

2012-10-01

230

Video Resources Central Asia  

E-print Network

Video Resources Central Asia · Central Asia Country Overviews: https://archive.org/details/central-asia · Kyrgyzstan: Crisis in Kyrgyzstan: Fuel, Contracts, and Revolution along the Afghan Supply Chain http://www.c-span.org/video

Qian, Ning

231

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

232

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

233

Feature tracking and aging  

PubMed Central

There are conflicting results regarding the effect of aging on second-order motion processing (i.e., motion defined by attributes other than luminance, such as contrast). Two studies (Habak and Faubert, 2000; Tang and Zhou, 2009) found that second-order motion processing was more vulnerable to aging than first-order motion processing. Conversely, Billino et al. (2011) recently found that aging affected first- and second-order motion processing by similar proportions. These three studies used contrast-defined motion as a second-order stimulus, but there can be at least two potential issues when using such a stimulus to evaluate age-related sensitivity losses. First, it has been shown that the motion system processing contrast-defined motion varies depending on the stimulus parameters. Thus, although all these three studies assumed that their contrast-defined motion was processed by a low-level second-order motion system, this was not necessarily the case. The second potential issue is that contrast-defined motion consists in a contrast modulation of a texture rich in high spatial frequencies and aging mainly affects contrast sensitivity at high spatial frequencies. Consequently, some age-related sensitivity loss to second-order motion could be due to a lower sensitivity to the texture rather than to motion processing per se. To avoid these two potential issues, we used a second-order motion stimulus void of high spatial frequencies and which has been shown to be processed by a high-level feature tracking motion system, namely fractal rotation (Lagacé-Nadon et al., 2009). We found an age-related deficit on second-order motion processing at all temporal frequencies including the ones for which no age-related effect on first-order motion processing was observed. We conclude that aging affects the ability to track features. Previous age-related results on second-order and global motion processing are discussed in light of these findings. PMID:23874318

Allard, Rémy; Lagacé-Nadon, Sarah; Faubert, Jocelyn

2013-01-01

234

Cooperative Modeling and Design History Tracking Using Design Tracking Matrix  

E-print Network

This thesis suggests a new framework for cooperative modeling which supports concurrency design protocol with a design history tracking function. The proposed framework allows designers to work together while eliminating design conflicts...

Kim, Jonghyun

2010-10-12

235

Adjacent track encroachment analysis at high track density  

NASA Astrophysics Data System (ADS)

The issue of adjacent track encroachment (ATE) has been studied for high track density (TPI) situations. Several techniques and methods have been utilized to determine the root cause of the adjacent track erasure. The new encroachment mechanisms, differing from those reported previously, have been identified for several different cases. It was found that the write-head gap edge corner or shoulder can generate a sizable fringing field, leading to measurable adjacent track encroachment problems in certain conditions. This type of side-erasure problem is not only associated with the amplitude and frequency of the writing current, but is also skew sensitive, depending upon both skew angle and skew polarity. Furthermore, finite element calculations confirm that in the vicinity of the notch corner, the fringing field strength could be as much as 4000 Oe. Experimentally it was also found that the side-erasure process induced by the notch shoulder was asymmetric in some situations.

Li, Zhihao; Schaff, Mike; Munson, Rolf; Jurisch, Mark; Noonon, Ted; Li, Shaoping; Zhou, Yuming

2003-05-01

236

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

237

Sun tracking systems: a review.  

PubMed

The output power produced by high-concentration solar thermal and photovoltaic systems is directly related to the amount of solar energy acquired by the system, and it is therefore necessary to track the sun's position with a high degree of accuracy. Many systems have been proposed to facilitate this task over the past 20 years. Accordingly, this paper commences by providing a high level overview of the sun tracking system field and then describes some of the more significant proposals for closed-loop and open-loop types of sun tracking systems. PMID:22412341

Lee, Chia-Yen; Chou, Po-Cheng; Chiang, Che-Ming; Lin, Chiu-Feng

2009-01-01

238

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

239

Storm Tracks Across Eastern Canada  

NASA Astrophysics Data System (ADS)

The global storm tracks patterns across the Northern Hemisphere are well documented, but their regional impact on populations has yet to be characterized, as very few studies took a local perspective on storm tracks. In this study, a Lagrangian tracking algorithm is applied to the 850 hPa relative vorticity field to characterize extratropical storm tracks that pass through major cities in Canada. Storm tracks are first classified in reference to the metropolitan cities that they impact, such as Toronto, Montreal, Halifax and St-John's. They are then subjected to several analyses, including but not limited to the identification of main development regions, typical tracks, mean growth rate, intensity and typical regions of decay. We found that the preferential development regions are the lee of the Rockies, the Great Lakes and the Western Atlantic. The collection of storm tracks across each city is composed of storms developing not from a single development region, but from several. Results show that the storm track variability at a city is dominated by the storm track variability of its predominant development region. Among others, we found that the ensembles of storms crossing East coast cities (Halifax, St-John's) are dominated by Atlantic storms that are most frequent during the winter. Storms passing through Montreal and Toronto travel primarily from the Great Lakes and the mid-latitude Rockies. In eastern Canada, storms from the southernmost part of the Rockies are much less frequent, but this development region is the main source of extreme storms, and is thus important in terms of impacts on metropolitan areas. The relationship between storm tracks and modes of atmospheric variability are also examined with an emphasis on the El Nino Southern Oscillation (ENSO) and Northern Annular Mode (NAM). We found that teleconnection shifts storm tracks differently in different development regions. The anomalous storm track densities are presented, as well as their direct impact on specific metropolitan areas. Results show that the combination of these shifts impact cities differently according to their geographic location.

Plante, Mathieu; Son, Seok-Woo; Gyakum, John; Kevin, Grise

2013-04-01

240

Visual object recognition and tracking  

NASA Technical Reports Server (NTRS)

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

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

2010-01-01

241

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

242

Sun Tracking Systems: A Review  

PubMed Central

The output power produced by high-concentration solar thermal and photovoltaic systems is directly related to the amount of solar energy acquired by the system, and it is therefore necessary to track the sun's position with a high degree of accuracy. Many systems have been proposed to facilitate this task over the past 20 years. Accordingly, this paper commences by providing a high level overview of the sun tracking system field and then describes some of the more significant proposals for closed-loop and open-loop types of sun tracking systems. PMID:22412341

Lee, Chia-Yen; Chou, Po-Cheng; Chiang, Che-Ming; Lin, Chiu-Feng

2009-01-01

243

Toward Robust Online Visual Tracking  

NASA Astrophysics Data System (ADS)

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

Yang, Ming-Hsuan; Ho, Jeffrey

244

High resolution track etch autoradiography  

DOEpatents

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

Solares, G.; Zamenhof, R.G.

1994-12-27

245

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

246

The sun-tracking control of solar collectors using high-performance step motors  

NASA Technical Reports Server (NTRS)

Sun-tracking solar energy-focusing devices involving a central receiver, thermionic conversion, or a distributed solar thermal collector system are described. The Perkins solar collector uses a fixed focal point about which an 18 m-diameter parabolic dish moves on tracks. The elevation axis also moves on a circular track. A microprocessor manipulates sun sensor information and sun ephemeris data to ensure correct placement. Stepper motors are digital devices which provide direct interface with digital electronics and a wide dynamic range, and could easily be associated with the microprocessors. Design philosophy, performance criteria, wind load analysis, and control system requirements are also discussed.

Hughes, R. O.

1977-01-01

247

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

PubMed Central

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

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

2014-01-01

248

IDENTIFICATION OF TRACK DAMAGE IN RAILWAY MAINTENANCE SYSTEM  

Microsoft Academic Search

Railway trains runs on railway track. A railway track is exposed to various forms of damage. Track damages can be due to several factors. Among them are unstable track foundation, damage to track component due to age, frequencies of running train and also weather conditions. A damage track can result in defect to the track geometry. Defect to the track

Othman Che Puan; Abdul Razak Bin Mohamed

249

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

250

Birth Defects Research and Tracking  

MedlinePLUS

... Information For... Media Policy Makers Research and Tracking Language: English Español (Spanish) Share Compartir On this Page Importance ... Blood Disorders & Disabilities Information For... Media Policy Makers Language: English Español (Spanish) File Formats Help: How do I ...

251

Advanced Telemetry Tracking Servo System  

NASA Astrophysics Data System (ADS)

The primary objective of the Advanced Telemetry Tracking System Integration and Development program at WSMR was the development and evaluation of an advanced, almost totally digital servo tracking and control system. This was satisfied by replacing the aging analog servo tracking and control system in one of WSMR's seven Transportable Telemetry Acquisition Systems (TTAS) with a digital control unit (DCU), an antenna control unit (ACU), and other related equipment, and then evaluating the performance of the resultant digital tracking system, referred to as the Advanced TTAS (TTAS-A). In this paper, a discussion of the TTAS-A servo system, with emphasis upon hardware external to the DCU, is presented. This includes the operation of servo position and rate loops, system status and warning conditions, and a description of the operator-to-system interface via the ACU display and control functions.

Hart, Michael J.

252

Automatic electronic fish tracking system  

NASA Technical Reports Server (NTRS)

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

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

1976-01-01

253

Person Tracking with Infrared Sensors  

Microsoft Academic Search

\\u000a We consider a person tracking system that is robust to environmental changes and users are unaware of. Once a user is identified\\u000a at an entrance door in a room with his\\/her biometrics, we can keep tracking the user continuously. The pyroelectric infrared\\u000a sensors in the ceiling are used for this goal. These sensors are resistant to environmental changes, but give

Taisuke Hosokawa; Mineichi Kudo

2005-01-01

254

Recent advances in track physics  

SciTech Connect

This volume contains the texts of the 17 invited papers presented at the Track Physics Conference held on the campus of the University of Nebraska, in Lincoln, during 18--20 October 1988. The conference brought together researchers from throughout the world who specialize in the study of the structure of particle tracks and its influence upon atomic physics, particle detection, radiation chemistry and radiobiology. Each paper is indexed separately on the energy data base.

Benton, E.V. (San Francisco Univ., CA (USA). Dept. of Physics); Starace, A.F. (eds.) (Nebraska Univ., Lincoln, NE (USA). Dept. of Physics and Astronomy)

1989-01-01

255

Silicon Tracking Upgrade at CDF  

SciTech Connect

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

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

1998-04-01

256

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 Müller, R.

1994-04-01

257

07/19/2007 09:43 AMDHL: Track details Page 1 of 2http://track.dhl-usa.com/TrackByNbr.asp?nav=Tracknbr  

E-print Network

07/19/2007 09:43 AMDHL: Track details Page 1 of 2http://track.dhl-usa.com/TrackByNbr.asp Track Services About DHL Help #12;07/19/2007 09:43 AMDHL: Track details Page 2 of 2http://track.dhl-usa.com/TrackByNbr.asp

Bartholdi III, John J.

258

SLR tracking of GPS-35  

NASA Technical Reports Server (NTRS)

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.

1994-01-01

259

Relative Track Metrics to Determine Model Mismatch  

Microsoft Academic Search

Tracking performance is a function of data quality, tracker type, and target maneuverability. Many contemporary tracking methods are useful for various operating conditions. To determine nonlinear tracking performance independent of the scenario, we wish to explore metrics that highlight the tracker capability. With the emerging relative track metrics, as opposed to root-mean-square error (RMS) calculations, we explore the Averaged Normalized

Erik Blasch; Andrew Rice; Chun Yang; Ivan Kadar

2008-01-01

260

Solar energy tracking structure incorporating wind spoilers  

Microsoft Academic Search

This patent describes a solar energy tracking assembly. The assembly producing reduced torque loading forces due to wind on the rotating portion of the tracking assembly. The solar energy tracking assembly comprised of: a fixed position base having one end securely fixed to the ground and having the second end supporting the remaining tracking assembly components; solar energy collecting means

M. W. Frohardt; K. H. Hartz; P. C. Hardee

1989-01-01

261

Stability of continuous welded rail track  

Microsoft Academic Search

As the use of continuous welded rail (CWR) increases in track structures, derailing disasters associated with track buckling also increase in great numbers due to high compressive thermal stress. A three-dimensional CWR track model is developed in the present study to be used for extensive buckling analysis of CWR tracks subjected to temperature load. The analysis model is encoded into

Nam-Hyoung Lim; Nam-Hoi Park; Young-Jong Kang

2003-01-01

262

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

263

3D tracking via body radio reflections  

E-print Network

This thesis presents 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 does ...

Kabelac, Zachary (Zachary E.)

2014-01-01

264

Silhouette Lookup for Automatic Pose Tracking  

Microsoft Academic Search

Computers should be able to detect and track the articulated 3-D pose of a human being moving through a video sequence. Current tracking methods often prove slow and unreliable, and many must be initialized by a human operator before they can track a sequence. This paper introduces a simple yet effective algorithm for tracking articulated pose, based upon looking up

Nicholas R. Howe

2004-01-01

265

TRELLIS STRUCTURE APPROACH TO MULTITARGET TRACKING  

Microsoft Academic Search

In this paper we address sequential multitarget tracking fo r Radar applications. Specifically, we consider the problem of asso ciating location measurement data over time to form estimates of multi- ple tracks. The algorithmic approach we employ is sequential and very flexible in that it can handle missed detections, false a larms, track initiation, and number-of-track estimation, while e mploying

Richard Perry; Anand Vaddiraju; Kevin Buckley

1999-01-01

266

Teaching braille line tracking using stimulus fading.  

PubMed

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 small gaps between characters. The current study extended previous line-tracking instruction using stimulus fading to teach tracking across larger gaps. After instruction, all participants showed improvement in line tracking, and 2 of 3 participants met mastery criteria for tracking across extended spaces. PMID:24829087

Scheithauer, Mindy C; Tiger, Jeffrey H

2014-01-01

267

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

268

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

269

TrackSafe: a track geometry car based real-time dynamics simulator  

Microsoft Academic Search

Recently, there has been a movement in the railroad industry to begin assessing track geometry and track safety on the basis of real-time predictions of rail vehicle behavior in response to track geometry measurements while on board a track geometry car running at full track speed. With support from the Federal Railroad Administration, ZETA-TECH Associates, Inc. has developed a system

Clifford S. Bonaventura; Allan M. Zarembski; Joseph W. Palese

2005-01-01

270

Quantification of human urinary exosomes by nanoparticle tracking analysis.  

PubMed

Exosomes are vesicles that are released from the kidney into urine. They contain protein and RNA from the glomerulus and all sections of the nephron and represent a reservoir for biomarker discovery. Current methods for the identification and quantification of urinary exosomes are time consuming and only semi-quantitative. Nanoparticle tracking analysis (NTA) counts and sizes particles by measuring their Brownian motion in solution. In this study, we applied NTA to human urine and identified particles with a range of sizes. Using antibodies against the exosomal proteins CD24 and aquaporin 2 (AQP2), conjugated to a fluorophore, we could identify a subpopulation of CD24- and AQP2-positive particles of characteristic exosomal size. Extensive pre-NTA processing of urine was not necessary. However, the intra-assay variability in the measurement of exosome concentration was significantly reduced when an ultracentrifugation step preceded NTA. Without any sample processing, NTA tracked exosomal AQP2 upregulation induced by desmopressin stimulation of kidney collecting duct cells. Nanoparticle tracking analysis was also able to track changes in exosomal AQP2 concentration that followed desmopressin treatment of mice and a patient with central diabetes insipidus. When urine was stored at room temperature, 4°C or frozen, nanoparticle concentration was reduced; freezing at -80°C with the addition of protease inhibitors produced the least reduction. In conclusion, with appropriate sample storage, NTA has potential as a tool for the characterization and quantification of extracellular vesicles in human urine. PMID:24060994

Oosthuyzen, Wilna; Sime, Nicole E L; Ivy, Jessica R; Turtle, Emma J; Street, Jonathan M; Pound, John; Bath, Louise E; Webb, David J; Gregory, Christopher D; Bailey, Matthew A; Dear, James W

2013-12-01

271

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

272

Drift and proportional tracking chambers  

SciTech Connect

Many techniques have been exploited in constructing tracking chambers, particle detectors which measure the trajectories and momenta of charged particles. The particular features of high-energy interactions - charged particle multiplicities, angular correlations and complex vertex topologies, to name a few - and the experimental environment of the accelerator - event rates, background rates, and so on - accent the importance of certain detector characteristics. In high energy e/sup +/e/sup -/, anti pp and pp interactions the final states are dominated by closely collimated jets of high multiplicity, requiring good track-pair resolution in the tracking chamber. High energy particles deflect very little in limited magnetic field volumes, necessitating good spatial resolution for accurate momentum measurements. The colliding beam technique generally requires a device easily adapted to full solid-angle coverage, and the high event rates expected in some of these machines put a premium on good time resolution. Finally, the production and subsequent decays of the tau, charmed and beautiful mesons will provide multiple vertex topologies. To reconstruct these vertices reliably will require considerable improvements in spatial resolution and track-pair resolution. This lecture considers the proportional counter and its descendant, the drift chamber, as tracking chambers. Its goal is to review the physics of this device in order to understand its performance limitations and promises.

Jaros, J.A.

1980-11-01

273

Automatic Tracking Of Multiple Objects  

NASA Astrophysics Data System (ADS)

We are developing a computer vision system to automatically detect and track human motion across the international border between the United States and Mexico. Fundamental requirements are that the system work in real time under varying environmental conditions with relatively inexpensive hardware. The work we describe is applicable to a wide range of multiple object tracking problems. This paper describes the algorithm we have developed to detect and track moving objects. The algorithm is based on the notion of path coherence. However, the algorithm presented there is not suitable for our application because it requires noise free images, all trajectories must be present from the first through last images, and it requires multiple passes throught the trajectory points as each new image is acquired. This procedure is not acceptable for real time applications. We have previously reported on the front end of our system which takes video images and determines the areas which represent changing objects'. Thus the input to the tracking portion of the system consists of a binary image representing the changing pixels. In this paper we present a detailed description of the tracking algorithm, its implementation in Smalltalk-80, and samples of its operation. We also discuss system performance as a function of trajectory complexity and image noise level.

Bernat, Andrew P.; Riter, Stephen

1989-03-01

274

Track structure in biological models.  

PubMed

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

Curtis, S B

1986-01-01

275

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

276

Axioms for Centrality  

E-print Network

Given a social network, which of its nodes are more central? This question has been asked many times in sociology, psychology and computer science, and a whole plethora of centrality measures (a.k.a. centrality indices, or rankings) were proposed to account for the importance of the nodes of a network. In this paper, we try to provide a mathematically sound survey of the most important classic centrality measures known from the literature and propose an axiomatic approach to establish whether they are actually doing what they have been designed for. Our axioms suggest some simple, basic properties that a centrality measure should exhibit. Surprisingly, only a new simple measure based on distances, harmonic centrality, turns out to satisfy all axioms; essentially, harmonic centrality is a correction to Bavelas's classic closeness centrality designed to take unreachable nodes into account in a natural way. As a sanity check, we examine in turn each measure under the lens of information retrieval, leveraging sta...

Boldi, Paolo

2013-01-01

277

Central Limit Theorem  

NSDL National Science Digital Library

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

Lane, David M.

278

The Majorana Parts Tracking Database  

E-print Network

The Majorana Demonstrator is an ultra-low background physics experiment searching for the neutrinoless double beta decay of $^{76}$Ge. The Majorana Parts Tracking Database is used to record the history of components used in the construction of the Demonstrator. The tracking implementation takes a novel approach based on the schema-free database technology CouchDB. Transportation, storage, and processes undergone by parts such as machining or cleaning are linked to part records. Tracking parts provides a great logistics benefit and an important quality assurance reference during construction. In addition, the location history of parts provides an estimate of their exposure to cosmic radiation. A web application for data entry and a radiation exposure calculator have been developed as tools for achieving the extreme radio-purity required for this rare decay search.

Abgrall, N; Avignone, F T; Bertrand, F E; Brudanin, V; Busch, M; Byram, D; Caldwell, A S; Chan, Y-D; Christofferson, C D; Combs, D C; Cuesta, C; Detwiler, J A; Doe, P J; Efremenko, Yu; Egorov, V; Ejiri, H; Elliott, S R; Esterline, J; Fast, J E; Finnerty, P; Fraenkle, F M; Galindo-Uribarri, A; Giovanetti, G K; Goett, J; Green, M P; Gruszko, J; Guiseppe, V E; Gusev, K; Hallin, A L; Hazama, R; Hegai, A; Henning, R; Hoppe, E W; Howard, S; Howe, M A; Keeter, K J; Kidd, M F; Kochetov, O; Kouzes, R T; LaFerriere, B D; Leon, J Diaz; Leviner, L E; Loach, J C; MacMullin, J; Martin, R D; Meijer, S J; Mertens, S; Miller, M L; Mizouni, L; Nomachi, M; Orrell, J L; O'Shaughnessy, C; Overman, N R; Petersburg, R; Phillips, D G; Poon, A W P; Pushkin, K; Radford, D C; Rager, J; Rielage, K; Robertson, R G H; Romero-Romero, E; Ronquest, M C; Shanks, B; Shima, T; Shirchenko, M; Snavely, K J; Snyder, N; Soin, A; Suriano, A M; Tedeschi, D; Thompson, J; Timkin, V; Tornow, W; Trimble, J E; Varner, R L; Vasilyev, S; Vetter, K; Vorren, K; White, B R; Wilkerson, J F; Wiseman, C; Xu, W; Yakushev, E; Young, A R; Yu, C -H; Zhitnikov, I

2015-01-01

279

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; Ataç, 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; Bürger, A; Cabaret, S; Cahan, B; Calore, E; Camera, F; Capsoni, A; Carrió, F; Casati, G; Castoldi, M; Cederwall, B; Cercus, J -L; Chambert, V; Chambit, M El; Chapman, R; Charles, L; Chavas, J; Clément, 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; Désesquelles, P; Detistov, P; Diarra, C; Didierjean, F; Dimmock, M R; Doan, Q T; Domingo-Pardo, C; Doncel, M; Dorangeville, F; Dosme, N; Drouen, Y; Duchêne, G; Dulny, B; Eberth, J; Edelbruck, P; Egea, J; Engert, T; Erduran, M N; Ertürk, 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; Gernhäuser, R; Giannatiempo, A; Giaz, A; Gibelin, L; Givechev, A; Goel, N; González, V; Gottardo, A; Grave, X; Gr?bosz, J; Griffiths, R; Grint, A N; Gros, P; Guevara, L; Gulmini, M; Görgen, A; Ha, H T M; Habermann, T; Harkness, L J; Harroch, H; Hauschild, K; He, C; Hernández-Prieto, A; Hervieu, B; Hess, H; Hüyük, 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; Kröll, Th; Krücken, 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; Lotodé, A; Lunardi, S; Maj, A; van der Marel, J; Mariette, Y; Marginean, N; Marginean, R; Maron, G; Mather, A R; M?czy?ski, W; Mendéz, 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; Möller, 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; Özben, 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; Pugnére, 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; Rossé, 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; Stézowski, O; Strachan, J; Suliman, G; Söderström, 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-Lanoë, 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

280

Fuzzy logic particle tracking velocimetry  

NASA Technical Reports Server (NTRS)

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

Wernet, Mark P.

1993-01-01

281

The Majorana Parts Tracking Database  

E-print Network

The Majorana Demonstrator is an ultra-low background physics experiment searching for the neutrinoless double beta decay of $^{76}$Ge. The Majorana Parts Tracking Database is used to record the history of components used in the construction of the Demonstrator. The tracking implementation takes a novel approach based on the schema-free database technology CouchDB. Transportation, storage, and processes undergone by parts such as machining or cleaning are linked to part records. Tracking parts provides a great logistics benefit and an important quality assurance reference during construction. In addition, the location history of parts provides an estimate of their exposure to cosmic radiation. A web application for data entry and a radiation exposure calculator have been developed as tools for achieving the extreme radio-purity required for this rare decay search.

The Majorana Collaboration; N. Abgrall; E. Aguayo; F. T. Avignone III; A. S. Barabash; F. E. Bertrand; V. Brudanin; M. Busch; D. Byram; A. S. Caldwell; Y-D. Chan; C. D. Christofferson; D. C. Combs; C. Cuesta; J. A. Detwiler; P. J. Doe; Yu. Efremenko; V. Egorov; H. Ejiri; S. R. Elliott; J. Esterline; J. E. Fast; P. Finnerty; F. M. Fraenkle; A. Galindo-Uribarri; G. K. Giovanetti; J. Goett; M. P. Green; J. Gruszko; V. E. Guiseppe; K. Gusev; A. L. Hallin; R. Hazama; A. Hegai; R. Henning; E. W. Hoppe; S. Howard; M. A. Howe; K. J. Keeter; M. F. Kidd; O. Kochetov; S. I. Konovalov; R. T. Kouzes; B. D. LaFerriere; J. Diaz Leon; L. E. Leviner; J. C. Loach; J. MacMullin; R. D. Martin; S. J. Meijer; S. Mertens; M. L. Miller; L. Mizouni; M. Nomachi; J. L. Orrell; C. O'Shaughnessy; N. R. Overman; R. Petersburg; D. G. Phillips II; A. W. P. Poon; K. Pushkin; D. C. Radford; J. Rager; K. Rielage; R. G. H. Robertson; E. Romero-Romero; M. C. Ronquest; B. Shanks; T. Shima; M. Shirchenko; K. J. Snavely; N. Snyder; A. Soin; A. M. Suriano; D. Tedeschi; J. Thompson; V. Timkin; W. Tornow; J. E. Trimble; R. L. Varner; S. Vasilyev; K. Vetter; K. Vorren; B. R. White; J. F. Wilkerson; C. Wiseman; W. Xu; E. Yakushev; A. R. Young; C. -H. Yu; V. Yumatov; I. Zhitnikov

2015-02-05

282

Mobile three dimensional gaze tracking.  

PubMed

Mobile eyetracking is a recent method enabling research on attention during real-life behavior. With the EyeSeeCam, we have recently presented a mobile eye-tracking device, whose camera-motion device (gazecam) records movies orientated in user's direction of gaze. Here we show that the EyeSeeCam can extract a reliable vergence signal, to measure the fixation distance. We extend the system to determine not only the direction of gaze for short distances more precisely, but also the fixation point in 3 dimensions (3D). Such information is vital, if gaze-tracking shall be combined with tasks requiring 3D information in the peri-personal space, such as grasping. Hence our method substantially extends the application range for mobile gaze-tracking devices and makes a decisive step towards their routine application in standardized clinical settings. PMID:21335867

Stoll, Josef; Kohlbecher, Stefan; Marx, Svenja; Schneider, Erich; Einhäuser, Wolfgang

2011-01-01

283

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

284

Denuclearizing central Asia  

Microsoft Academic Search

This study deals with two interrelated issues: the withdrawal of Soviet nuclear weapons from Central Asia; and the regional nuclear?weapon?free zone (NWFZ) initiative. Central Asian countries succeeded in denuclearizing the region. The ex?Soviet nuclear weapons were withdrawn from Central Asia, and fissile material production for military purposes was stopped. The Central Asian states acceded to the Non?Proliferation Treaty (NPT) and

Alexander Sergounin

1999-01-01

285

European Central Bank  

NSDL National Science Digital Library

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

286

Central Venous Catheter Access  

Microsoft Academic Search

Central venous access for the purpose of supplying parenteral nutrition to the pediatric age group requires a careful definition of the patient’s caloric need, estimated duration of therapy, and an assessment of available sites. Peripheral vein parenteral nutrition is limited by caloric density of the nutrient fluids, while peripherally inserted central catheters (PICC) offers a new technology for accessing central

Dai H Chung; Moritz M Ziegler

1998-01-01

287

Track-based alignment of the CMS Muon System  

NASA Astrophysics Data System (ADS)

The Muon system of the Compact Muon Solenoid (CMS) Detector at the Large Hadron Collider (LHC) is comprised of 250 Drift Tube (DT) and 468 Cathode Strip (CSC) Chambers. These detectors identify muons, provide a fast muon trigger, and are used to measure muon trajectories. The latter allows improvement of the momentum resolution for highly energetic muons compared to resolutions obtained with the central CMS silicon tracker alone. Performance of the Muon system depends on precise knowledge of the positions of each of the muon tracking elements within the CMS detector. We describe the techniques used to align the Muon system elements with high precision and quantify the accuracy of the alignment procedure. The current baseline algorithm provides an in-situ alignment of the system using tracks from the pp collision data. We particularly emphasize the software environment design and tools built to measure and validate positions of the muon detectors.

Schneider, Austin; Khotilovich, Vadim; Pakhotin, Yuriy; Safonov, Alexei; Tatarinov, Aysen

2013-04-01

288

Design of a photovoltaic central power station  

SciTech Connect

Photovoltaic central power station designs have been developed for both high-efficiency flat-panel arrays and two-axis tracking concentrator arrays. Both designs are based on a site adjacent to the Saguaro Power Station of Arizona Public Service. The plants are 100 MW each, made of 5 MW subfields. The site specific designs allow detailed cost estimate for site preparation, installation, and engineering. These designs are summarized and cost estimates analyzed. Provided also are recommendations for future work to reduce system cost for each plant design.

Not Available

1984-02-01

289

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

290

Tracking errors in 2D multiple particle tracking microrheology  

NASA Astrophysics Data System (ADS)

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

Kowalczyk, Anne; Oelschlaeger, Claude; Willenbacher, Norbert

2015-01-01

291

Robotic vehicle with multiple tracked mobility platforms  

SciTech Connect

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

292

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

NASA Technical Reports Server (NTRS)

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

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

1977-01-01

293

Architecture and Functions of Database Management System for Tracking and Management of Tools  

E-print Network

and Informatics, Bulgaria 2 Central Laboratory of Mechatronics & Instrumentation, 1113 Sofia Abstract: This work advanced information like calibrations and inspection results and track changes of these over time. It will also be able to log all operations performed on the tools. The MTF and especially its web-based

Borissova, Daniela

294

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

E-print Network

Using Satellite Tracking to Optimize Protection of Long- Lived Marine Species: Olive Ridley Sea Turtle Conservation in Central Africa Sara M. Maxwell1¤ *, Greg A. Breed2 , Barry A. Nickel3 , Junior, University of California Santa Cruz, Santa Cruz, California, United States of America, 2 Department

Costa, Daniel P.

295

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

296

Distributed Urban Data Gathering and Congestion Tracking in a Vehicle-to-Infrastructure Architecture  

E-print Network

, location, and direction data to a central server via a Vehicle-to-Infrastructure network every 10 seconds the flow of traffic based on the location of cellular phones within an area. This approach has come underDistributed Urban Data Gathering and Congestion Tracking in a Vehicle

Miller, Jeffrey A.

297

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

298

Phase transitions and postural deviations during bimanual kinesthetic tracking.  

PubMed

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

Stinear, J W; Byblow, W D

2001-04-01

299

Tracking algorithms for multiagent systems.  

PubMed

This paper is devoted to the consensus tracking issue on multiagent systems. Instead of enabling the networked agents to reach an agreement asymptotically as the time tends to infinity, the consensus tracking between agents is considered to be derived on a finite time interval as accurately as possible. We thus propose a learning algorithm with a gain operator to be determined. If the gain operator is designed in the form of a polynomial expression, a necessary and sufficient condition is obtained for the networked agents to accomplish the consensus tracking objective, regardless of the relative degree of the system model of agents. Moreover, the H? analysis approach is introduced to help establish conditions in terms of linear matrix inequalities (LMIs) such that the resulting processes of the presented learning algorithm can be guaranteed to monotonically converge in an iterative manner. The established LMI conditions can also enable the iterative learning processes to converge with an exponentially fast speed. In addition, we extend the learning algorithm to address the relative formation problem for multiagent systems. Numerical simulations are performed to demonstrate the effectiveness of learning algorithms in achieving both consensus tracking and relative formation objectives for the networked agents. PMID:24808602

Meng, Deyuan; Jia, Yingmin; Du, Junping; Yu, Fashan

2013-10-01

300

Fast-Track Teacher Recruitment.  

ERIC Educational Resources Information Center

Schools need a Renaissance human-resources director to implement strategic staffing and fast-track teacher-recruitment plans. The HR director must attend to customer satisfaction, candidate supply, web-based recruitment possibilities, stabilization of newly hired staff, retention of veteran staff, utilization of retired employees, and latest…

Grant, Franklin Dean

2001-01-01

301

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

302

Ship Tracks South of Alaska  

NSDL National Science Digital Library

This page from NASA's Earth Observatory shows images of visible tracks made in the Earth's atmosphere from clouds forming around ship exhaust particles. One of these images shows the relative sizes of the particles, and the text relates the relative sizes to the relative brightness of the clouds that are formed.

2009-05-27

303

Tracking Success in Youth Employment.  

ERIC Educational Resources Information Center

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

Rieder, Corinne H.

1979-01-01

304

Etching fission tracks in zircons  

USGS Publications Warehouse

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

Naeser, C.W.

1969-01-01

305

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

2011-11-24

306

N. Gierasimczuk Truth-Tracking  

E-print Network

A. Baltag N. Gierasimczuk S. Smets Truth-Tracking by Belief Revision Abstract. We study to correct, i.e., true, beliefs. We focus on the issue of universality: whether or not a particular belief data, and provided that a non-standard, i.e., non-well- founded prior plausibility relation is allowed

Amsterdam, University of

307

Long distance tracking of birds  

NASA Technical Reports Server (NTRS)

The application of radio telemetry techniques to the long distance tracking of birds is discussed. The types of equipment developed and methods for attachment to a bird are described. The operating range of the radio transmitter receiver system is examined, and methods for acquiring and analyzing the data are explained.

Cochran, W. W.

1972-01-01

308

Tracking Sentence Planning and Production  

PubMed Central

Objective. To assess age differences in the costs of language planning and production. Methods. A controlled sentence production task was combined with digital pursuit rotor tracking. Participants were asked to track a moving target while formulating a sentence using specified nouns and verbs and to continue to track the moving target while producing their response. The length of the critical noun phrase (NP) as well as the type of verb provided were manipulated. Results. The analysis indicated that sentence planning was more costly than sentence production, and sentence planning costs increased when participants had to incorporate a long NP into their sentence. The long NPs also tended to be shifted to the end of the sentence, whereas short NPs tended to be positioned after the verb. Planning or producing responses with long NPs was especially difficult for older adults, although verb type and NP shift had similar costs for young and older adults. Discussion. Pursuit rotor tracking during controlled sentence production reveals the effects of aging on sentence planning and production. PMID:21060066

Bontempo, Daniel; McKedy, Whitney; Schmalzried, RaLynn; Tagliaferri, Bruno; Kieweg, Doug

2011-01-01

309

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

310

Rice Boulevard Track/Soccer  

E-print Network

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

Mellor-Crummey, John

311

40 CFR 262.84 - Tracking document.  

Code of Federal Regulations, 2010 CFR

...CONTINUED) STANDARDS APPLICABLE TO GENERATORS OF HAZARDOUS WASTE Transfrontier Shipments...by water (bulk shipments only) the generator must forward the tracking document...originate at the site of generation, the generator must forward the tracking...

2010-07-01

312

49 CFR 213.331 - Track surface.  

Code of Federal Regulations, 2013 CFR

...enough to accommodate the minimum length of runoff, part of the runoff may be on tangent track. 3 However, to control harmonics on jointed track with staggered joints, the crosslevel differences shall not exceed 1 inch in all of six...

2013-10-01

313

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

314

Tracks in a hydrogen bubble chamber  

NSDL National Science Digital Library

This Particle Physics UK Image of the Month shows particle tracks in a liquid hydrogen-filled bubble chamber. The page contains a paragraph that explains the most distinctive tracks. A high resolution image is provided.

2007-07-26

315

High Speed in Europe Slab Track Systems  

E-print Network

Even the rails are still from 1972 Besides rail grinding, no maintenance Rheda slab track Continuous Ballast Thermal insulation by Styrofoam Concrete Cement improved Subsoil Rheda slab track Source:9 Subsoil

Barkan, Christopher P.L.

316

Recovery of D-8 tracked vehicle  

NSF Publications Database

Title : Recovery of D-8 tracked vehicle Type : Antarctic EAM NSF Org: OD / OPP Date : November 20 ... Action Memorandum (Recovery of D-8 Track Vehicle) To: File S.7 (Environment) On November 13, 1990 ...

317

Drift chamber tracking with neural networks  

SciTech Connect

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

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

1992-10-01

318

CARDIOVASCULAR MEDICINE FELLOWSHIP PROCEDURE TRACKING FORM  

E-print Network

1 CARDIOVASCULAR MEDICINE FELLOWSHIP PROCEDURE TRACKING FORM Please complete and return this form: Date of Original Certification: _________________ Expiration: ______________ CARDIOVASCULAR PROCEDURES

Ford, James

319

More Durable Tracks for Heavy Vehicles  

NASA Technical Reports Server (NTRS)

Tie bars instead of threaded fasteners make track throwing less likely. Proposed undercarriage for tank or bulldozer has flanged edges to prevent rocks and other road debris from getting caught in track drive and damaging or casting off track. Improved track has no threaded fasteners to be loosened by road shock and vibration. Continuous chain of floating guide bars articulated at web junctions. Pins replace bolted connections. Guide bars and flanges on vehicle keep out stones.

Collins, Earl R., Jr.

1987-01-01

320

Unsupervised Tracking From Clustered Graph Patterns  

E-print Network

Unsupervised Tracking From Clustered Graph Patterns Fabien Diot, Elisa Fromont, Baptiste Jeudy.Martinot@alcatel-lucent.com Abstract--This paper shows how data mining and in partic- ular graph mining and clustering can help] or background information on the objects to track (skin color, shape etc.). For the tracking process, techniques

Boyer, Edmond

321

Human tracking using distributed vision systems  

Microsoft Academic Search

We present a wide area human tracking method using distributed computer vision systems. Each vision system consists of a camera and an image processor and they are all connected through a computer network. In this paper, we propose a method for human tracking and for coordination of all the vision systems. The human tracking method works on each vision system

Atsushi NAKAZAWA; Hirokazu KATO; Seiji INOKUCHI

1998-01-01

322

Ground target tracking-a historical perspective  

Microsoft Academic Search

Airborne sensor platforms such as Joint STARS provide a capability for ground surveillance and monitoring target movements. Because of the high target density and maneuverability, high clutter, low visibility due to terrain masking, etc., ground target tracking presents unique challenges not present in tracking other types of targets. This paper reviews major developments in multi-target tracking over the past four

Chee-Yee Chong; David Garren; Timothy P. Grayson

2000-01-01

323

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

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

Improvement of overlapping nuclear track densitometry.  

PubMed

Detection of tracks produced by ? particles, protons or nuclear fission fragments in plastic detectors, viz., solid-state nuclear track detectors, constitutes a very important tool in various areas. It is not easy for humans to count CR-39 nuclear tracks manually, especially when the track density is very high. An automated computer program called KTTMS2, written in C++ and running with a user friendly interface, has been developed for recognition and parametric measurements of etched tracks in images captured from the surface of solid-state nuclear track detectors. Well-known edge detection methods were applied to estimate the precision and accuracy of nuclear track densitometry using the CR-39 detector. Among the various routine edge detection methods, the Canny method was chosen because it was the most accurate technique. Because accuracy becomes more important as the track density increases, this allows more overlapping tracks to be detected. KTTMS2 (the proposed system) has an efficiency of 95% and can identify the noise as a background track (5%). Experimental results showed that the error percentage was reduced from 7.63% to 3.23% for high-density tracks when the count was adjusted by the estimated overlapping tracks. PMID:25581623

Ghergherehchi, M; Kim, S Y; Afarideh, H; Kim, Y S; Chai, J S

2015-03-01

326

Detection and frequency tracking of chirping signals  

SciTech Connect

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

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

1990-08-01

327

Multiple-target tracking with radar applications  

Microsoft Academic Search

The theory and evaluation methods for the design of multiple target tracking (MTT) systems are examined. The Kalman and fixed-gain filtering, techniques for adaptive filtering, and the selection of tracking coordinate systems for filtering and prediction are described. Gating and data association techniques, measurement formation and processing for MTT, and methods for track confirmation and deletion are discussed. MTT system

S. S. Blackman

1986-01-01

328

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

329

SONIC EQUIPMENT FOR TRACKING INDIVIDUAL FISH  

E-print Network

SONIC EQUIPMENT FOR TRACKING INDIVIDUAL FISH Marine Biological Laboratory LIBRAEY AUG y- 1956 WOODS transducer (sonic tag) 1 Automatic -tracking receiver 4 Portable receiver 5 ATTACHMENT OF TRANSDUCER TO ADULT ACKNOWLEDGMENTS 11 REFERENCES 11 #12;SONIC EQUIPMENT FOR TRACKING INDIVIDUAL FISH The U. S. Fish and Wildlife

330

A Robust Framework for Visual Object Tracking  

Microsoft Academic Search

Visual object tracking is an important problem in computer vision. Recent proposed tracking methods based on online learning a discriminative classifier have drawn considerable interest. However, most of existing approaches make a simple assumption about initializing the object to be tracked; on-line adaptation of binary classifier only has to discriminate the current object from its surrounding background can lead to

Nguyen Dang Binh

2009-01-01

331

SPINK, A Thin Elements Spin Tracking Code  

SciTech Connect

Spink is a spin tracking code for spin polarized particles. The code tracks both trajectories in 3D and spin. It works using thick element modeling from MAD and thin element modeling based on the BMT equation to track spin. The code is written in Fortran and typically runs on a Linux platform, either sequentially or MPI-parallel.

Luccio, Alfredo U. [Brookhaven National Laboratory, Upton, NY (United States)

2009-08-04

332

CRIMINAL JUSTICE MAJOR CRIMINAL JUSTICE SCHOLARS TRACK  

E-print Network

CRIMINAL JUSTICE MAJOR CRIMINAL JUSTICE SCHOLARS TRACK The Criminal Justice Scholars Track prepares the opportunity for select students to work closely with Criminal Justice professors who will mentor them in the Criminal Justice Scholars Track will engage in research and rich discussion as they study relevant Criminal

Wu, Shin-Tson

333

Joint tracking of features and edges  

Microsoft Academic Search

Sparse features have traditionally been tracked from frame to frame independently of one another. We propose a framework in which features are tracked jointly. Combining ideas from Lucas-Kanade and Horn-Schunck, the estimated motion of a feature is influenced by the estimated motion of neighboring features. The approach also handles the prob- lem of tracking edges in a unified way by

Stanley T. Birchfield; Shrinivas J. Pundlik

2008-01-01

334

Faculty Governance and Nontenure-Track Appointments  

ERIC Educational Resources Information Center

Nontenure-track faculty are a diverse set of professionals who are difficult to characterize and paint with a broad brush. One issue, however, applies across all nontenure-track faculty appointment types: faculty governance. This article discusses university-level faculty governance participation as it relates to nontenure-track appointments,…

Morrison, Joshua D.

2008-01-01

335

Charged-track multiplicity of B  

Microsoft Academic Search

There are only ten stable charged particles (e, mu, pi, K and p and their antimatter partners) that can leave tracks in our detector. Due to detector inefficiency, the charged particles sometimes get lost and undetected. Therefore, the original parent charged track multiplicity is different from what we observe. We are interested in finding the original parent charged track multiplicity

Tong-Uk Lee

1999-01-01

336

On the track profile in magnetoresistive heads  

Microsoft Academic Search

The relationship of the track profile in MR heads to the magnetic state of the MR sensor is studied in two examples. The first, using an exchange bias film for transverse biasing, was chosen because it displays a range of track profile behavior. The second employs soft film biasing. Using a detailed micromagnetic model, the quiescent bias states and track

D. E. Heim

1994-01-01

337

MILSTAR reflector antennas with electronic tracking feeds  

Microsoft Academic Search

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

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

1995-01-01

338

MILSTAR reflector antennas with electronic tracking feeds  

Microsoft Academic Search

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

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

1994-01-01

339

Tracking Video Objects in Cluttered Background  

Microsoft Academic Search

We present an algorithm for tracking video ob- ject which is based on an hybrid strategy. This strategy uses both object and region information to solve the corre- spondence problem. Low level descriptors are exploited to track object's regions and to cope with track management issues. Appearance and disappearance of objects, splitting and partial occlusions are resolved through interactions be-

Andrea Cavallaro; Olivier Steiger; Touradj Ebrahimi

2005-01-01

340

SPINK, A Thin Elements Spin Tracking Code  

NASA Astrophysics Data System (ADS)

spink is a spin tracking code for spin polarized particles. The code tracks both trajectories in 3D and spin. It works using thick element modeling from MAD and thin element modeling based on the BMT equation to track spin. The code is written in Fortran and typically runs on a Linux platform, either sequentially or MPI-parallel.

Luccio, Alfredo U.

2009-08-01

341

Fabrication of Flyable Perpendicular Discrete Track Media  

Microsoft Academic Search

Discrete track media offers many potential recording advantages over conventional continuous media in hard disk drives. In this study, we present a novel fabrication process for discrete track perpendicular magnetic media via electron beam lithography, ion milling, and the use of a protective Al sacrificial layer. Physical characterization of the media confirms the process is able to produce patterned tracks

Matthew T. Moneck; Jian-Gang Zhu; Xiaodong Che; Yawshing Tang; Hyung Jai Lee; Shuyu Zhang; Ki-Seok Moon; Nobuyuki Takahashi

2007-01-01

342

ADAPTIVE ROBUST TRACKING CONTROL OF PRESSURE  

E-print Network

1---- ·1· ADAPTIVE ROBUST TRACKING CONTROL OF PRESSURE TRAJECTORY BASED ON KALMAN FILTER * CAO, tracking control of both force trajectory and position trajectory need the high-precision pressure control in pneumatic systems. In this paper, an adaptive robust pressure controller is designed to enhance the tracking

Yao, Bin

343

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

E-print Network

CS225774_E CDC's National Environmental Public Health Tracking Network MAINE Keeping Track their networks every day to improve the health of their communities. Why Tracking Matters in Maine Since joining CDC's Tracking Program, Maine has greatly expanded its ability to monitor environmental health issues

344

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

E-print Network

CS225774_T CDC's National Environmental Public Health Tracking Network NEW JERSEY Keeping Track their networks every day to improve the health of their communities. Why Tracking Matters in New Jersey New often in their communities. To meet these concerns, the New Jersey Environmental Public Health Tracking

345

Measuring the performance of track-to-track fusion systems  

Microsoft Academic Search

An effort is ongoing to develop a multi-source integration (MSI) system for the E-2C Hawkeye aircraft. The objective of this system development is to merge track information from a variety of dissimilar sources and present to the operator a useful and uncluttered real-time picture of the battlespace to support the current suite of missions being performed by the aircrew onboard

M. Silbert; A. Burroughs

2004-01-01

346

49 CFR 236.54 - Minimum length of track circuit.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Minimum length of track circuit. 236.54 Section 236.54 Transportation...Rules and Instructions: All Systems Track Circuits § 236.54 Minimum length of track circuit. When a track circuit shorter than...

2010-10-01

347

49 CFR 236.54 - Minimum length of track circuit.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Minimum length of track circuit. 236.54 Section 236.54 Transportation...Rules and Instructions: All Systems Track Circuits § 236.54 Minimum length of track circuit. When a track circuit shorter than...

2013-10-01

348

49 CFR 236.54 - Minimum length of track circuit.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Minimum length of track circuit. 236.54 Section 236.54 Transportation...Rules and Instructions: All Systems Track Circuits § 236.54 Minimum length of track circuit. When a track circuit shorter than...

2011-10-01

349

49 CFR 236.54 - Minimum length of track circuit.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Minimum length of track circuit. 236.54 Section 236.54 Transportation...Rules and Instructions: All Systems Track Circuits § 236.54 Minimum length of track circuit. When a track circuit shorter than...

2012-10-01

350

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

NASA Astrophysics Data System (ADS)

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

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

2012-10-01

351

Solar central receiver heliostat reflector assembly  

DOEpatents

A heliostat reflector assembly for a solar central receiver system comprises a light-weight, readily assemblable frame which supports a sheet of stretchable reflective material and includes mechanism for selectively applying tension to and positioning the sheet to stretch it to optical flatness. The frame is mounted on and supported by a pipe pedestal assembly that, in turn, is installed in the ground. The frame is controllably driven in a predetermined way by a light-weight drive system so as to be angularly adjustable in both elevation and azimuth to track the sun and efficiently continuously reflect the sun's rays to a focal zone, i.e. central receiver, which forms part of a solar energy utilization system, such as a solar energy fueled electrical power generation system. The frame may include a built-in system for testing for optical flatness of the reflector. The preferable geometric configuration of the reflector is octagonal; however, it may be other shapes, such as hexagonal, pentagonal or square. Several different embodiments of means for tensioning and positioning the reflector to achieve optical flatness are disclosed. The reflector assembly is based on the stretch frame concept which provides an extremely light-weight, simple, low-cost reflector assembly that may be driven for positioning and tracking by a light-weight, inexpensive drive system.

Horton, Richard H. (Schenectady, NY); Zdeb, John J. (Clifton Park, NY)

1980-01-01

352

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

353

[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

354

PDF-XChange .docu-track.c  

E-print Network

1 C lick to buy N O W ! PDF-XChange w w w .docu-track.c o m C lick to buy N O W ! PDF-XChange w w w .docu-track.c o m #12;2 C lick to buy N O W ! PDF-XChange w w w .docu-track.c o m C lick to buy N O W ! PDF-XChange w w w .docu-track.c o m #12;3 C lick to buy N O W ! PDF-XChange w w w .docu-track.c o m C

355

Towards large scale multi-target tracking  

NASA Astrophysics Data System (ADS)

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

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

2014-06-01

356

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

357

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

358

Tracking with the mind's eye  

NASA Technical Reports Server (NTRS)

The two components of voluntary tracking eye-movements in primates, pursuit and saccades, are generally viewed as relatively independent oculomotor subsystems that move the eyes in different ways using independent visual information. Although saccades have long been known to be guided by visual processes related to perception and cognition, only recently have psychophysical and physiological studies provided compelling evidence that pursuit is also guided by such higher-order visual processes, rather than by the raw retinal stimulus. Pursuit and saccades also do not appear to be entirely independent anatomical systems, but involve overlapping neural mechanisms that might be important for coordinating these two types of eye movement during the tracking of a selected visual object. Given that the recovery of objects from real-world images is inherently ambiguous, guiding both pursuit and saccades with perception could represent an explicit strategy for ensuring that these two motor actions are driven by a single visual interpretation.

Krauzlis, R. J.; Stone, L. S.

1999-01-01

359

Doppler tracking of planetary spacecraft  

NASA Technical Reports Server (NTRS)

This article concerns the measurement of Doppler shift on microwave links that connect planetary spacecraft with the Deep Space Network. Such measurements are made by tracking the Doppler effect with phase-locked loop receivers. A description of equipment and techniques as well as a summary of the appropriate mathematical models are given. The two-way Doppler shift is measured by transmitting a highly-stable microwave (uplink) carrier from a ground station, having the spacecraft coherently transpond this carrier, and using a phase-locked loop receiver at the ground station to track the returned (downlink) carrier. The largest sources of measurement error are usually plasma noise and thermal noise. The plasma noise, which may originate in the ionosphere or the solar corona, is discussed; and a technique to partially calibrate its effect, involving the use of two simultaneous downlink carriers that are coherently related, is described. Range measurements employing Doppler rate-aiding are also described.

Kinman, Peter W.

1992-01-01

360

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

361

Group and extended object tracking  

NASA Astrophysics Data System (ADS)

The problem of tracking point targets moving in a group, or features of an extended object, is formulated via a general two component model. An example involving translation, scaling, rotation and pattern distortion is presented. It is assumed that measurements of the points are unlabelled, which, together with a significant clutter level, leads to measurement association uncertainty. A Bayesian bootstrap filter is used to implement a nonlinear, multiple hypothesis, recursive estimator.

Salmond, David J.; Gordon, Neil J.

1999-10-01

362

Integrated eyeball-tracking device  

NASA Astrophysics Data System (ADS)

This investigation presents a concept of integrated device, which tracks the movement of eyeball in real time. Integrated optical components are applied to perform infrared oculography to find the position of the eyeball. First, the photodiodes emits infrared to human eyes via the output coupler, then the reflected light is collected by the input coupler and detected by the photodetectors. By analyzing the electrical signal, we could figure the position of the eyeball out. The basic principle is based on the differential of reflected index between sclera and iris. The light source and detectors are settled on the side of goggles worn and, in doing so, the eyesight could be wide without obstacles. Therefore, the optical guiding interconnection is an essential issue for the eyeball- tracking device. Since the fine line gratings are necessary for the optical coupler, the electron beam writing is used to meet the requirement. The gratings with 40 nm line width are achieved, and it is sufficient for optical coupling. On the other hand, the electrical signal related eyeball position is simulated. We could translate the electrical signal readout into the coordinate of the eyeball position. The whole eyeball-tracking device would be small volume, less weight, and portable.

Chen, Hunglin; Yen, Kaihsiang; Chio, Jinhung; Huang, Huiwen; Dai, Chingliang; Chang, Chienliu; Chang, Peizen

2000-07-01

363

Optical memory system having track following  

SciTech Connect

A high density optical storage system is disclosed which employs a laser beam for reading data in a track on a rotating optical disk containing a large number of concentric tracks. Track following is provided using a galvanometer-controlled mirror in the path of the beam which is angularly deflected during track following in response to detected track deviations, whereby the beam is controlled to accurately follow the track. Provision is also made for detecting the angular position of the mirror. A linear motor responsive to the detected angular position moves the mirror in a direction which reduces the deflection required to be provided by the mirror in order to maintain the beam accurately following the track. The mirror is also controlled in response to the rate of change of the linear motor velocity for providing greater system stability.

Hsieh, D.; LaBudde, E.V.

1984-02-14

364

Segmentation of Tracking Sequences Using Dynamically Updated Adaptive Learning  

PubMed Central

The problem of segmentation of tracking sequences is of central importance in a multitude of applications. In the current paper, a different approach to the problem is discussed. Specifically, the proposed segmentation algorithm is implemented in conjunction with estimation of the dynamic parameters of moving objects represented by the tracking sequence. While the information on objects’ motion allows one to transfer some valuable segmentation priors along the tracking sequence, the segmentation allows substantially reducing the complexity of motion estimation, thereby facilitating the computation. Thus, in the proposed methodology, the processes of segmentation and motion estimation work simultaneously, in a sort of “collaborative” manner. The Bayesian estimation framework is used here to perform the segmentation, while Kalman filtering is used to estimate the motion and to convey useful segmentation information along the image sequence. The proposed method is demonstrated on a number of both computed-simulated and real-life examples, and the obtained results indicate its advantages over some alternative approaches. PMID:19004712

Michailovich, Oleg; Tannenbaum, Allen

2009-01-01

365

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 Per capita consumption Population (100 millions) 0 5 10 15 20 25 30 35 North America Western Europe

Johnson, Matthew

366

Wetlands of Central America  

Microsoft Academic Search

The wetlands of seven Central American countries – Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and Panamá – are reviewed. The region's wetlands are classified into five systems: marine, estuarine, riverine, lacustrine, and palustrine. At a minimum, wetlands cover ˜40,000 km2 (˜8%) of the land area of Central America. These wetlands support high levels of biological diversity, especially of

Aaron M. Ellison

2004-01-01

367

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

368

Tracking and activity recognition through consensus in distributed camera networks.  

PubMed

Camera networks are being deployed for various applications like security and surveillance, disaster response and environmental modeling. However, there is little automated processing of the data. Moreover, most methods for multicamera analysis are centralized schemes that require the data to be present at a central server. In many applications, this is prohibitively expensive, both technically and economically. In this paper, we investigate distributed scene analysis algorithms by leveraging upon concepts of consensus that have been studied in the context of multiagent systems, but have had little applications in video analysis. Each camera estimates certain parameters based upon its own sensed data which is then shared locally with the neighboring cameras in an iterative fashion, and a final estimate is arrived at in the network using consensus algorithms. We specifically focus on two basic problems-tracking and activity recognition. For multitarget tracking in a distributed camera network, we show how the Kalman-Consensus algorithm can be adapted to take into account the directional nature of video sensors and the network topology. For the activity recognition problem, we derive a probabilistic consensus scheme that combines the similarity scores of neighboring cameras to come up with a probability for each action at the network level. Thorough experimental results are shown on real data along with a quantitative analysis. PMID:20550994

Song, Bi; Kamal, Ahmed T; Soto, Cristian; Ding, Chong; Farrell, Jay A; Roy-Chowdhury, Amit K

2010-10-01

369

The effect of tracking network configuration on GPS baseline estimates for the CASA Uno experiment  

NASA Technical Reports Server (NTRS)

The effect of the tracking network on long (greater than 100 km) GPS baseline estimates was estimated using various subsets of the global tracking network initiated by the first Central and South America (CASA Uno) experiment. It was found that best results could be obtained with a global tacking network consisting of three U.S. stations, two sites in the southwestern Pacific, and two sites in Europe. In comparison with smaller subsets, this global network improved the baseline repeatability, the resolution of carrier phase cycle ambiguities, and formal errors of the orbit estimates.

Wolf, S. Kornreich; Dixon, T. H.; Freymueller, J. T.

1990-01-01

370

North Central Texas Council of Governments North Central Texas  

E-print Network

North Central Texas Council of Governments North Central Texas Thinking Ahead Donna Coggeshall North Central Texas Council of Governments #12;North Central Texas Council of Governments Thinking Ahead are for the 12-county MPA #12;North Central Texas Council of Governments Thinking Ahead Development Form #12

Texas at Arlington, University of

371

Moving target tracking using multiple sensors  

NASA Astrophysics Data System (ADS)

Multiple Sensors improve tracking performance. The Kinematic Automatic Tracker (KAT) may drop a track when the Joint STARS aircraft is turning or the track is screened. In situation like this multiple sensors can improve tracking performance. Two algorithms for tracking moving targets using multiple sensors are developed. Both algorithms are based on modifying the existing KAT architecture. The first approach is based on the use of the best sensor's Moving Target Indicators (MTIs) when the sensors have overlapping dwells. The second and more general approach uses the report-to-track fusion algorithm. The first approach is frame- based (with multiple dwells), whereas the second approach is dwell- based. The tracking results are presented for the first algorithm for a two-sensors Korean scenario with increasing complexity. We also show the advantages of using multiple sensors for tracking using a simulated Korea scenario. For the report-to-track fusion algorithm, we present preliminary tracking results for a simulated scenario using two UAV sensors.

Lodaya, Manikant D.; Bottone, Richard

2000-07-01

372

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

373

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.

374

Central Force JS Model  

NSDL National Science Digital Library

The Central Force JavaScript Model computes the trajectory of a particle acted on by a central force.  The model reads uses a JavaScript mathematical expression parser to read the force and a adaptive step Runge-Kutta 5(4) algorithm to compute the trajectory.  This model is designed to test the speed of the JS parser and the accuracy of the EJS JavaScript ODE solver. The Central Force JS Model was developed using the Easy Java Simulations (EJS) version 5. It is distributed as a ready-to-run html page and requires only a browser with JavaScript support.

Christian, Wolfgang

2013-09-01

375

Telemetry, Tracking and Command System  

NASA Astrophysics Data System (ADS)

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

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

1983-11-01

376

Tracking system for solar collectors  

DOEpatents

A tracking system is provided for pivotally mounted spaced-apart solar collectors. A pair of cables is connected to spaced-apart portions of each collector, and a driver displaces the cables, thereby causing the collectors to pivot about their mounting, so as to assume the desired orientation. The collectors may be of the cylindrical type as well as the flat-plate type. Rigid spar-like linkages may be substituted for the cables. Releasable attachments of the cables to the collectors is also described, as is a fine tuning mechanism for precisely aligning each individual collector.

Butler, B.

1980-10-01

377

Tracking system for solar collectors  

DOEpatents

A tracking system is provided for pivotally mounted spaced-apart solar collectors. A pair of cables is connected to spaced-apart portions of each collector, and a driver displaces the cables, thereby causing the collectors to pivot about their mounting, so as to assume the desired orientation. The collectors may be of the cylindrical type as well as the flat-plate type. Rigid spar-like linkages may be substituted for the cables. Releasable attachments of the cables to the collectors is also described, as is a fine tuning mechanism for precisely aligning each individual collector.

Butler, Barry L. (Golden, CO)

1984-01-01

378

Robotic Target-Tracking Subsystem  

NASA Technical Reports Server (NTRS)

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

Shawaga, Lawrence M.

1989-01-01

379

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

380

NASA tracking ship navigation systems  

NASA Technical Reports Server (NTRS)

The ship position and attitude measurement system that was installed aboard the tracking ship Vanguard is described. An overview of the entire system is given along with a description of how precise time and frequency is utilized. The instrumentation is broken down into its basic components. Particular emphasis is given to the inertial navigation system. Each navigation system used, a mariner star tracker, navigation satellite system, Loran C and OMEGA in conjunction with the inertial system is described. The accuracy of each system is compared along with their limitations.

Mckenna, J. J.

1976-01-01

381

Two-axis tracking solar collector mechanism  

DOEpatents

This invention is a novel solar tracking mechanism incorporating a number of practical features that give it superior environmental resilience and exceptional tracking accuracy. The mechanism comprises a lightweight space-frame assembly supporting an array of point-focus Fresnel lenses in a two-axis tracking structure. The system is enclosed under a glass cover which isolates it from environmental exposure and enhances tracking accuracy by eliminating wind loading. Tracking accuracy is also enhanced by the system's broad-based tracking support. The system's primary intended application would be to focus highly concentrated sunlight into optical fibers for transmission to core building illumination zones, and the system may also have potential for photovoltaic or photothermal solar energy conversion. 16 figs.

Johnson, K.C.

1992-12-08

382

Two-axis tracking solar collector mechanism  

DOEpatents

This invention is a novel solar tracking mechanism incorporating a number of practical features that give it superior environmental resilience and exceptional tracking accuracy. The mechanism comprises a lightweight space-frame assembly supporting an array of point-focus Fresnel lenses in a two-axis tracking structure. The system is enclosed under a glass cover which isolates it from environmental exposure and enhances tracking accuracy by eliminating wind loading. Tracking accuracy is also enhanced by the system's broad-based tracking support. The system's primary intended application would be to focus highly concentrated sunlight into optical fibers for transmission to core building illumination zones, and the system may also have potential for photovoltaic or photothermal solar energy conversion.

Johnson, Kenneth C. (201 W. California Ave., #401, Sunnyvale, CA 94086)

1990-01-01

383

Two-axis tracking solar collector mechanism  

DOEpatents

This invention is a novel solar tracking mechanism incorporating a number of practical features that give it superior environmental resilience and exceptional tracking accuracy. The mechanism comprises a lightweight space-frame assembly supporting an array of point-focus Fresnel lenses in a two-axis tracking structure. The system is enclosed under a glass cover which isolates it from environmental exposure and enhances tracking accuracy by eliminating wind loading. Tracking accuracy is also enhanced by the system's broad-based tracking support. The system's primary intended application would be to focus highly concentrated sunlight into optical fibers for transmission to core building illumination zones, and the system may also have potential for photovoltaic or photothermal solar energy conversion.

Johnson, Kenneth C. (201 W. California Ave. #705, Sunnyvale, CA 94086)

1992-01-01

384

Central serous choroidopathy  

MedlinePLUS

... the disease lasts longer, may be helped by laser treatment or photodynamic therapy to seal the leak ... small number of patients will have complications of laser treatment that impair central vision. That is why ...

385

Central ballast tanker design  

SciTech Connect

The purpose of this paper is to present the CENTRAL BALLAST TANKER Design. This design is intended to reduce the volume of oil spilled from tankers by giving the crew a tanker properly designed and equipped to allow large quantities of oil from ruptured tank(s) to flow safely to a fully-inerted central ballast tank. In addition to reducing the volume of oil spilled, the design also addresses many of the shortcomings of the DOUBLE HULL DESIGN which are increasingly becoming a concern. The following is a brief review of the development of the CENTRAL BALLAST TANKER. The simple operational features, stability, low cost and ease of maintenance of the single hull tanker were important and can be retained with the CENTRAL BALLAST DESIGN.

NONE

1997-01-01

386

Central Cord Syndrome  

MedlinePLUS

... to those over the age of 50. What research is being done? Our understanding of central cord syndrome has increased greatly in recent decades as a result of research funded conducted by the National Institute of Neurological ...

387

Central sleep apnea  

MedlinePLUS

... in someone who has a problem with the brainstem, which controls breathing. Conditions that can cause or ... central sleep apnea include: Problems that affect the brainstem (the brainstem controls breathing) including brain infection, stroke, ...

388

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

389

Optimal control of sun tracking solar concentrators  

NASA Technical Reports Server (NTRS)

Application of the modern control theory to derive an optimal sun tracking control for a point focusing solar concentrator is presented. A standard tracking problem converted to regulator problem using a sun rate input achieves an almost zero steady state tracking error with the optimal control formulation. However, these control techniques are costly because optimal type algorithms require large computing systems, thus they will be used mainly as comparison standards for other types of control algorithms and help in their development.

Hughes, R. O.

1979-01-01

390

Advances in solid state nuclear track detectors  

Microsoft Academic Search

A new source of natural tracks in mica has been discovered--due to recoiling atoms struck by alpha particles from radioactive impurities. These submicron tracks have a radiation-damage rate and thermal stability similar to that expected for a slowly moving monopole-nucleus bound state and are a valuable benchmark in an ongoing search for s|ow, supermassive magnetic monopoles. Plastic track detectors are

P. B. Price; M. H. Salamon

1986-01-01

391

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. Magaña-Loaiza; Gregory A. Howland; Mehul Malik; John C. Howell; Robert W. Boyd

2013-06-10

392

Temporal node centrality in complex networks  

NASA Astrophysics Data System (ADS)

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.

Kim, Hyoungshick; Anderson, Ross

2012-02-01

393

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

394

Probability: Central limit theorem  

NSDL National Science Digital Library

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

2013-06-21

395

Random grid fern for visual tracking  

NASA Astrophysics Data System (ADS)

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

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

2014-05-01

396

Object detection and tracking under planar constraints  

NASA Astrophysics Data System (ADS)

Automatic object detection and tracking has been widely applied in the video surveillance systems for homeland security and data fusion in the remote sensing and airborne imagery. The typical applications include human motion analysis, vehicle detection, and architectural building detection. Here we conduct object detection and tracking under planar constraints for interesting objects. Planar surface abounds in man-made environment. It provides much useful information for image understanding and then can be adopted to improve the performance of object detection and tracking. The experiments on real data show that object detection and tracking could be successfully implemented by incorporating planar information of interesting objects.

He, Qiang; Chu, Chee-Hung Henry; Camargo, Aldo

2013-05-01

397

SOUTH MISSISSIPPI MICROBIAL SOURCE TRACKING MX964495  

EPA Science Inventory

This study will utilize Microbial Source Tracking (MST) methodologies to provide method development and validation, network building, public education and infrastructure building for coastal waters....

398

Advanced tracking systems design and analysis  

NASA Technical Reports Server (NTRS)

The results of an assessment of several types of high-accuracy tracking systems proposed to track the spacecraft in the National Aeronautics and Space Administration (NASA) Advanced Tracking and Data Relay Satellite System (ATDRSS) are summarized. Tracking systems based on the use of interferometry and ranging are investigated. For each system, the top-level system design and operations concept are provided. A comparative system assessment is presented in terms of orbit determination performance, ATDRSS impacts, life-cycle cost, and technological risk.

Potash, R.; Floyd, L.; Jacobsen, A.; Cunningham, K.; Kapoor, A.; Kwadrat, C.; Radel, J.; Mccarthy, J.

1989-01-01

399

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

400

Discovery of nuclear tracks in interplanetary dust  

NASA Technical Reports Server (NTRS)

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

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

1984-01-01

401

A comparative evaluation of visual tracking systems  

NASA Astrophysics Data System (ADS)

This paper provides comparative evaluations of two visual object tracking algorithms - the Shape Estimating Filter (SEF), a homogeneous extension of the basic correlation tracker; and its multi-object counterpart the Competitive Attentional Correlation Tracker using Shape (CACTuS). The CACTuS is evaluated comparatively against its predecessor to show direct improvement in tracking effectiveness. Our approach will involve an evaluation framework consisting of a range of modern, peer reviewed tracking performance metrics, allowing for a detailed multi-faceted analysis of tracking results. As such we provide an overview of current performance evaluation methods, including techniques for multi-object tracker evaluation.

Gatt, Adam; Wong, Sebastien; Kearney, David; Watts, Edward

2009-05-01

402

Radar signals dismount tracking for urban operations  

NASA Astrophysics Data System (ADS)

It is critical in urban environments to not only track cars and tanks; but also individuals. Tracking dismounts, whereby an individual exits a car, can be done using conventional Electro-Optical (full color) or Infrared (thermal) cameras. However, EO/IR systems are subject to weather and line-of-sight conditions (i.e. person blocked by cloud) as well are degraded for long ranges. In this study, we pursue the use of radar images for dismount tracking. Radar dismount tracking will not entail the same robust features for person identification as EO systems; however, by being able to maintain track in all-weather conditions would afford friendly forces a location of all moving individuals. We show, using a feature-based tracker, that dismount detection, tracking, and potential intent, is possible. Radio Frequency (RF) tracking of dismounts is a relatively new concept because the data has not been available. By forming a data set based on the POSER TM program, and post-processing the data, we are interested in exploring the possibility of RF dismount tracking. In this paper, we (1) explore the generation of RF dismount data, (2) apply feature-based tracking algorithm to locate the moving target, and (3) assess the performance.

Blasch, Erik; Majumder, Uttam; Minardi, Michael

2006-05-01

403

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

404

NationalEnvironmentalPublicHealthTrackingProgram www.cdc.gov/nceh/tracking  

E-print Network

TrackingMatterstoMontana Because lead, radon, and arsenic occur naturally in Montana, statewide maps need to identify concentrations of these pollutants in relation to potentially exposed residents. To do this, the Montana Tracking

405

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

Code of Federal Regulations, 2010 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...

2010-10-01

406

Subaru FATS (fault tracking system)  

NASA Astrophysics Data System (ADS)

The Subaru Telescope requires a fault tracking system to record the problems and questions that staff experience during their work, and the solutions provided by technical experts to these problems and questions. The system records each fault and routes it to a pre-selected 'solution-provider' for each type of fault. The solution provider analyzes the fault and writes a solution that is routed back to the fault reporter and recorded in a 'knowledge-base' for future reference. The specifications of our fault tracking system were unique. (1) Dual language capacity -- Our staff speak both English and Japanese. Our contractors speak Japanese. (2) Heterogeneous computers -- Our computer workstations are a mixture of SPARCstations, Macintosh and Windows computers. (3) Integration with prime contractors -- Mitsubishi and Fujitsu are primary contractors in the construction of the telescope. In many cases, our 'experts' are our contractors. (4) Operator scheduling -- Our operators spend 50% of their work-month operating the telescope, the other 50% is spent working day shift at the base facility in Hilo, or day shift at the summit. We plan for 8 operators, with a frequent rotation. We need to keep all operators informed on the current status of all faults, no matter the operator's location.

Winegar, Tom W.; Noumaru, Junichi

2000-07-01

407

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

408

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

E-print Network

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

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

2008-01-01

409

Superior augmented reality registration by integrating landmark tracking and magnetic tracking  

Microsoft Academic Search

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

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

1996-01-01

410

Optimization of the solar energy collection in tracking and non-tracking photovoltaic solar system  

Microsoft Academic Search

Experimental and theoretical analysis is made of the conditions of collection of solar radiation in solar tracking system without concentration, and in ooo-trackiug system with standard and bifacial photovoltaic solar panel. For the experiments with solar tracking, an original Sun tracker was developed. The tracking effect calculated and measured shows an increase in energy collection around 30 - 40 %a;

P. Yu. Vorobiev; J. Gonzalez-Hernandez; Yuri V. Vorobiev

2004-01-01

411

On the tracking error of a self-contained solar tracking system  

Microsoft Academic Search

This paper deals with the analysis of the tracking errors of a self-contained solar tracking system that is totally powered by solar energy. The effect of the different design parameters of the system on its tracking error is studied in detail, in an attempt to define the important factors that influence the system's performance. The obtained results present valuable design

A. Baz; A. Sabry; A. Mobarak; S. Morcos

1984-01-01

412

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

E-print Network

CS225774_O CDC's National Environmental Public Health Tracking Network VERMONT Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

413

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

E-print Network

CS225774_S CDC's National Environmental Public Health Tracking Network WASHINGTON Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

414

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

E-print Network

CS225774_I CDC's National Environmental Public Health Tracking Network MINNESOTA Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

415

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

E-print Network

CS225774_G CDC's National Environmental Public Health Tracking Network CALIFORNIA Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

416

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

E-print Network

CS225774_L CDC's National Environmental Public Health Tracking Network LOUISIANA Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

417

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

E-print Network

CS225774_J CDC's National Environmental Public Health Tracking Network IOWA Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

418

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

E-print Network

CS225774_U CDC's National Environmental Public Health Tracking Network PENNSYLVANIA Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

419

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

E-print Network

CS225774_N CDC's National Environmental Public Health Tracking Network UTAH Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

420

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

E-print Network

CS225774_P CDC's National Environmental Public Health Tracking Network COLORADO Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

421

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

E-print Network

CS225774_C CDC's National Environmental Public Health Tracking Network SOUTH CAROLINA Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

422

CDC's National Environmental Public Health Tracking Network NEW YORK CITY Keeping Track, Promoting Health  

E-print Network

CS225774_A CDC's National Environmental Public Health Tracking Network NEW YORK CITY Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

423

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

424

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

E-print Network

CS225774_W CDC's National Environmental Public Health Tracking Network NEW HAMPSHIRE Keeping Track, Promoting Health "CDC's National Environmental Public Health Tracking Network is the most important accomplishment of the past decade." Thomas A. Burke, Ph.D., M.P.H. Associate Dean for Public Health Practice

425

TANG et al.: DETECTION AND TRACKING OF OCCLUDED PEOPLE 1 Detection and Tracking of Occluded People  

E-print Network

TANG et al.: DETECTION AND TRACKING OF OCCLUDED PEOPLE 1 Detection and Tracking of Occluded People Siyu Tang tang@mpi-inf.mpg.de Mykhaylo Andriluka andriluka@mpi-inf.mpg.de Bernt Schiele schiele;2 TANG et al.: DETECTION AND TRACKING OF OCCLUDED PEOPLE Figure 1: Detection results at equal error rate

426

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.

427

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

428

MetroTrack: Predictive Tracking of Mobile Events Using Mobile Phones  

NASA Astrophysics Data System (ADS)

We propose to use mobile phones carried by people in their everyday lives as mobile sensors to track mobile events. We argue that sensor-enabled mobile phones are best suited to deliver sensing services (e.g., tracking in urban areas) than more traditional solutions, such as static sensor networks, which are limited in scale, performance, and cost. There are a number of challenges in developing a mobile event tracking system using mobile phones. First, mobile sensors need to be tasked before sensing can begin, and only those mobile sensors near the target event should be tasked for the system to scale effectively. Second, there is no guarantee of a sufficient density of mobile sensors around any given event of interest because the mobility of people is uncontrolled. This results in time-varying sensor coverage and disruptive tracking of events, i.e., targets will be lost and must be efficiently recovered. To address these challenges, we propose MetroTrack, a mobile-event tracking system based on off-the-shelf mobile phones. MetroTrack is capable of tracking mobile targets through collaboration among local sensing devices that track and predict the future location of a target using a distributed Kalman-Consensus filtering algorithm. We present a proof-of-concept implementation of MetroTrack using Nokia N80 and N95 phones. Large scale simulation results indicate that MetroTrack prolongs the tracking duration in the presence of varying mobile sensor density.

Ahn, Gahng-Seop; Musolesi, Mirco; Lu, Hong; Olfati-Saber, Reza; Campbell, Andrew T.

429

MATHEMATICAL MODELLING OF A HELICOPTER ROTOR TRACK AND BALANCE: RESULTS  

Microsoft Academic Search

A mathematical model of a helicopter rotor track and balance is used in order to study optimal balancing and tracking, and their relationship. It is shown that perfect tracking does not necessarily lead to optimal balancing. Furthermore, cases of perfect tracking, may be accompanied by relatively high vibrations. Tracking or balancing at a certain air speed may also be accompanied

R. Ben-Ari; A. Rosen

1997-01-01

430

Evaluating a Storm Tracking Algorithm Objectively and without human truthing  

E-print Network

Evaluating a Storm Tracking Algorithm Objectively and without human truthing Valliappa Lakshmanan1 is not errors in forecast displacement [Wilson et al., 1998]. Lakshmanan et. al (OU/NSSL) Scoring Tracking 26th Statistics of each track Compute the following statistics on each track: 1 dur is the duration of the track

Lakshmanan, Valliappa

431

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.; Leppänen, Jukka M.; Vanhatalo, Sampsa

2014-01-01

432

A Centrality Detector Concept  

E-print Network

The nucleus-nucleus impact parameter and collision geometry of a heavy ion collision are typically characterized by assigning a collision "centrality". In all present heavy ion experiments centrality is measured indirectly, by detecting the number of particles or the energy of the particles produced in the interactions, typically at high rapidity. Centrality parameters are associated to the measured detector response using the Glauber model. This approach suffers from systematic uncertainties related to the assumptions about the particle production mechanism and limitations of the Glauber model. In the collider based experiments there is a unique possibility to measure centrality parameters by registering spectator fragments remaining from the collision. This approach does not require model assumptions and relies on the fact that spectators and participants are related via the total number of nucleons in the colliding species. This article describes the concept of the centrality detector for heavy ion experiment, which measures the total mass number of all fragments by measuring their deflection in the magnetic field of the collider elements.

Sourav Tarafdar; Zvi Citron; Alexander Milov

2014-05-18

433

A centrality detector concept  

NASA Astrophysics Data System (ADS)

The nucleus-nucleus impact parameter and collision geometry of a heavy ion collision are typically characterized by assigning a collision "centrality". In all present heavy ion experiments centrality is measured indirectly, by detecting the number of particles or the energy of the particles produced in the interactions, typically at high rapidity. Centrality parameters are associated to the measured detector response using the Glauber model. This approach suffers from systematic uncertainties related to the assumptions about the particle production mechanism and limitations of the Glauber model. In the collider based experiments there is a unique possibility to measure centrality parameters by registering spectator fragments remaining from the collision. This approach does not require model assumptions and relies on the fact that spectators and participants are related via the total number of nucleons in the colliding species. This paper describes the concept of a centrality detector for heavy ion experiment, which measures the total mass number of all fragments by measuring their deflection in the magnetic field of the collider elements.

Tarafdar, Sourav; Citron, Zvi; Milov, Alexander

2014-12-01

434

Central exclusive dijet production at the Tevatron  

NASA Astrophysics Data System (ADS)

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

Goulianos, Konstantin

2014-11-01

435

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 ~250 ms 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

436

Video Lab -NOAA Central Library NOAA Central Library  

E-print Network

2014 Video Lab - NOAA Central Library NOAA Central Library 1315 East West Highway, SSMC3, 2nd Floor Silver Spring, MD 20910 www.lib.noaa.gov #12;NOAA Central Library Video Lab The NOAA Central Library Video Lab is available to all NOAA scientists for their business related media work, including digital

437

Human tracking using ceiling pyroelectric infrared sensors  

Microsoft Academic Search

This paper presents a novel human tracking scheme by using pyroelectric infrared sensors. The scheme includes the visibility modulation of each sensor detector, the layout of the system, the localization and tracking algorithms. The results from the 3D simulations using Webots and Matlab together validate our scheme, and comparisons with other related schemes are made as well. Simulations show that

Xiaomu Luo; Baihua Shen; Xuemei Guo; Guocai Luo; Guoli Wang

2009-01-01

438

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

439

A Calibration Algorithm for Solar Tracking System  

Microsoft Academic Search

Solar tracking systems that use cameras, lenses and mechanical motion stages usually calibrate each device independently. While this scheme allows modular systems characterization it has the disadvantage of using additional expensive calibration patterns. In this work, we present a low cost solar tracking platform integrating on the shelf components. To avoid the use of additional components for system calibration we

Miguel Romero; Rafael Lemuz; Irene O. Ayaquica-Martinez; Griselda Saldana-Gonz´lez

2011-01-01

440

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

441

A versatile tracking system for AUV testing  

Microsoft Academic Search

Testing and development of AUVs and AUV-based systems can be greatly accelerated with access to a suitable underwater tracking range area. A tracking system was recently developed jointly by the NSWCCD Acoustic Research Detachment (ARD) and the University of Idaho (UI). Located on Lake Pend Oreille, the system is used routinely to test AUVs being developed at UI. The system

Doug Odell; Jesse Pentzer; John Canning; Dean Edwards

2010-01-01

442

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

443

OCCLUSION REASONING FOR MULTIPLE OBJECT VISUAL TRACKING  

E-print Network

' & $ % OCCLUSION REASONING FOR MULTIPLE OBJECT VISUAL TRACKING ZHENG WU Dissertation submitted OBJECT VISUAL TRACKING by ZHENG WU B.S., Zhejiang University, China, 2003 M.S., Zhejiang University been very patient to instruct me with every piece of my work in the past six years, providing extremely

Wu, Zheng

444

Railroad track repairs are complete at KSC  

NASA Technical Reports Server (NTRS)

Railroad track repairs have been completed at Kennedy Space Center. This section of track is located on KSC property, just north of the NASA Causeway in the KSC Industrial Area. The repairs were required following the minor derailment of two solid rocket booster segment cars on July 18.

2000-01-01

445

Cloud tracking by scale space classification  

Microsoft Academic Search

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

Dipti Prasad Mukherjee; Scott T. Acton

2002-01-01

446

Robert Collins Tracking in Dense Crowds  

E-print Network

Penn State Robert Collins VLPR 2012 Tracking in Dense Crowds Goal: Track targets in high typical crowd behavior to provide better motion priors. #12;Penn State Robert Collins VLPR 2012 Point realistic interactions Crowd Flow Social Force Models #12;Penn State Robert Collins VLPR 2012 Crowd Flow

Collins, Robert T.

447

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

448

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

449

UWB Tracking Algorithms: AOA and TDOA  

NASA Technical Reports Server (NTRS)

Ultra-Wideband (UWB) tracking prototype systems are currently under development at NASA Johnson Space Center for various applications on space exploration. For long range applications, a two-cluster Angle of Arrival (AOA) tracking method is employed for implementation of the tracking system; for close-in applications, a Time Difference of Arrival (TDOA) positioning methodology is exploited. Both AOA and TDOA are chosen to utilize the achievable fine time resolution of UWB signals. This talk presents a brief introduction to AOA and TDOA methodologies. The theoretical analysis of these two algorithms reveal the affecting parameters impact on the tracking resolution. For the AOA algorithm, simulations show that a tracking resolution less than 0.5% of the range can be achieved with the current achievable time resolution of UWB signals. For the TDOA algorithm used in close-in applications, simulations show that the (sub-inch) high tracking resolution is achieved with a chosen tracking baseline configuration. The analytical and simulated results provide insightful guidance for the UWB tracking system design.

Ni, Jianjun David; Arndt, D.; Ngo, P.; Gross, J.; Refford, Melinda

2006-01-01

450

Formation of Charged Particle Tracks in Solids  

Microsoft Academic Search

A criterion for formation of etchable tracks in solids is suggested using the well-known concepts of ionization and thermal spikes, diffusion process with useful and justified assumptions, and present or published experimental and theoretical investigations on the same subject. The suggested criterion is useful for a wide spectrum of researchers including development and applications of track recording materials, ions implantation,

Rana A. Mukhtar

2006-01-01

451

Binocular tracking: integrating perception and control  

Microsoft Academic Search

Presents an active binocular tracking system using log-polar images with contributions in both the perceptual and control aspects. The control part is based on the visual servoing framework, including kinematics and dynamics. We introduce a fixation constraint that simplifies the tracking problem by decoupling the visual kinematics and allowing us to express system dynamics in image coordinates. Simple dynamic controllers

Alexandre Bernardino

1999-01-01

452

Differential Kalman Filteringfor Tracking Rayleigh Fading Channels  

E-print Network

Differential Kalman Filteringfor Tracking Rayleigh Fading Channels M. J. Ornidi,S.Gazol;F? G. Gulak in the tracking of a fadingchannel plays an essential role in many wireless receivers. The conventional Kalman implementation. In this paper a new approach is proposed for the implementation of the Kalman filter based

Gulak, P. Glenn

453

Visual tracking for multimodal human computer interaction  

Microsoft Academic Search

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

Jie Yang; Rainer Stiefelhagen; Uwe Meier; Alex Waibel

1998-01-01

454

Use of track detectors in biomedical sciences.  

PubMed

The CR-39 track detectors have been applied to irradiate the Chinese hamster V79-753B cells for survival studies. The survival curves have given satisfactory results. Energies of the incoming as well as outgoing proton beams evaluated from the track diameters are found to be close to the values found separately by surface barrier detector (SSBD). PMID:11543206

Waheed, A; Majeed, A; Cera, F; Tiveron, P; Cherubini, R; Moschini, G; Khan, E U

1993-01-01

455

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

456

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

457

VictoriaReginaModels: Stellar evolutionary tracks  

NASA Astrophysics Data System (ADS)

The Victoria-Regina stellar models are comprised of seventy-two grids of stellar evolutionary tracks accompanied by complementary zero-age horizontal branches and are presented in “equivalent evolutionary phase” (.eep) files. This Fortran 77 software interpolates isochrones, isochrone population functions, luminosity functions, and color functions of stellar evolutionary tracks.

VandenBerg, Don A.; Bergbusch, Peter A.; Dowler, Patrick D.

2014-04-01

458

IMD HUMS rotor track and balance techniques  

Microsoft Academic Search

The purpose of this paper is to discuss the inner workings of the Integrated Mechanical Diagnostics Health and Usage Management Systems (MD HUMS) Rotor Track and Balance (RTB) algorithm and its performance. The algorithm can perform solutions in two modes Minimum Vibration (MV) or Minimum Adjustment (MA) with or without track data. The system is totally configurable and can be

Eric Bechhoefer; D. Power

2003-01-01

459

Emergency department patient-tracking system evaluation  

Microsoft Academic Search

Information technology is rapidly being developed and implemented for health care environments, often as a replacement for paper based or other manual tools. One example of this transition is the replacement of large dry-erase boards, used in emergency departments (ED) for tracking patient locations and clinical care, with computerized patient-tracking systems. The design of such systems has important implications for

Priyadarshini R. Pennathur; Dapeng Cao; Ann M. Bisantz; Li Lin; Rollin J. Fairbanks; Robert L. Wears; Shawna J. Perry; Theresa K. Guarrera; Jennifer L. Brown; Zheng Sui

2011-01-01

460

Lip segmentation and tracking for facial palsy  

NASA Astrophysics Data System (ADS)

We developed the asymmetry analyzing system for facial palsy patient's rehabilitation progress study. Using PC standard imaging device, captured 640*480 RGB image is converted into HSV space. A Lip-shape mask is extracted by thresholding. By taking 5 regions consisted in one region on lip and four regions on face skin, reasonable thresholds are determined by Fuzzy C-Means clustering. The extreme points on the lip shape mask are extracted to get the seeds for tracking. Segmented seed points are tracking by Iterative Lucas-Kanade tracking method in pyramids at 30 fps and recording simultaneously. To reduce the disk writing load on computer, we use asynchronous mode file writing, which is going to transfer to and review by clinician. Tracking shows quite reliable results, but sometimes the tracked points are following along the lip line because of the similar contrasts. Therefore, the first strategy to improve the reliability of tracking is using the high contrast points, such as left and right maximal point of lip shape. The second is clustering some points near the maximal points and eliminating outlying tracking points. The third is rechecking the lip shape using lip segmentation when the operator confirms that subject's maximal lip moving. Left and right tracking points are compared in forms of trajectory plot.

Park, MinJae; Seo, JongMo; Park, KwangSuk

2006-02-01

461

Track Reconstruction for the NIFFTE TPC  

NASA Astrophysics Data System (ADS)

The Global Nuclear Energy Partnership (GNEP) has funded the construction of a Time Projection Chamber (TPC) to be used for precision fission cross-section measurements through the Nuclear Energy Research Initiative (NERI). This poster shall illustrate the status of algorithms intended for intelligent track finding and track fitting using raw data obtained TPC simulations. The track fitting effort in this experiment has borrowed a number of ideas from high-energy physics along with other pattern recognition techniques not previously affiliated with experimental physics. Two track-finding techniques have been investigated. The Hough Transform is a brute force attempt at finding tracks. The second paradigm for track reconstruction, Binary Space Partitioning (BSP) was found to be less computationally expensive than the Hough Transform. BSP has been borrowed from the field of computer animation and rendering. To determine track fit parameters, an iterative Kalman Filter has been implemented that allows multiple scattering and energy losses to be taken into account to obtain unbiased errors. Fitted tracks obtained from the Kalman Filter were used to generate the best kinematic fit on the vertex.

Sharma, Sarvagya

2008-10-01

462

Track Reconstruction for the NIFFTE TPC  

NASA Astrophysics Data System (ADS)

The Global Nuclear Energy Partnership (GNEP) has funded the construction of a Time Projection Chamber (TPC) to be used for precision fission cross-section measurements through the Nuclear Energy Research Initiative (NERI). This poster shall illustrate the status of algorithms intended for intelligent track finding and track fitting using raw data obtained TPC simulations will be presented. The track fitting effort in this experiment has borrowed a number of ideas from high-energy physics along with other pattern recognition techniques not previously affiliated with experimental physics. Two track-finding techniques have been investigated. The Hough Transform is a brute force attempt at finding tracks. The second paradigm for track reconstruction, Binary Space Partitioning (BSP), was found to be less computationally expensive. BSP however had to be used in conjunction with a multilayer perceptron to rejoin tracks that were overly partitioned. To determine track fit parameters, an iterative Kalman Filter has been implemented that allows multiple scattering and energy losses to be taken into account to obtain unbiased errors.

Sharma, Sarvagya

2008-10-01

463

Tracking Vehicles in traffic Surveillance Video  

SciTech Connect

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

Maire, M; Kamath, C

2005-08-12

464

On sonobuoy placement for submarine tracking  

Microsoft Academic Search

This paper addresses the problem of detecting and tracking an unknown number of submarines in a body of water using a known number of moving sonobuoys. Indeed, we suppose there are N submarines collectively maneuvering as a weakly interacting stochastic dynamical system, where N is a random number, and we need to detect and track these submarines using M moving

Michael A. Kouritzin; David J. Ballantyne; Hyukjoon Kim; Yaozhong Hu

2005-01-01

465

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

466

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

467

30 CFR 56.12042 - Track bonding.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

468

30 CFR 57.12042 - Track bonding.  

Code of Federal Regulations, 2013 CFR

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

2013-07-01

469

30 CFR 57.12042 - Track bonding.  

Code of Federal Regulations, 2012 CFR

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

2012-07-01

470

30 CFR 56.12042 - Track bonding.  

Code of Federal Regulations, 2011 CFR

...Resources 1 2011-07-01 2011-07-01 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...

2011-07-01

471

Hemifield effects in multiple identity tracking.  

PubMed

In everyday life, we often need to attentively track moving objects. A previous study has claimed that this tracking occurs independently in the left and right visual hemifields (Alvarez & Cavanagh, 2005, Psychological Science,16, 637-647). Specifically, it was shown that observers were much more accurate at tracking objects that were spread over both visual hemifields as opposed to when all were confined to a single visual hemifield. In that study, observers were not required to remember the identities of the objects. Conversely, in real life, there is seldom any benefit to tracking an object unless you can also recall its identity. It has been predicted that when observers are required to remember the identities of the tracked objects a bilateral advantage should no longer be observed (Oksama & Hyönä, 2008, Cognitive Psychology, 56, 237-283). We tested this prediction and found that a bilateral advantage still occurred, though it was not as strong as when observers were not required to remember the identities of the targets. Even in the later case we found that tracking was not completely independent in the two visual hemifields. We present a combined model of multiple object tracking and multiple identity tracking that can explain our data. PMID:22952767

Hudson, Charlotte; Howe, Piers D L; Little, Daniel R

2012-01-01

472

Partnership Attitude Tracking Study, Teens 2002.  

ERIC Educational Resources Information Center

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

2002

473

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

474

Tracking Cell Signals in Fluorescent Images  

Microsoft Academic Search

In this paper we present the techniques for tracking cell signal in GFP (Green Fluorescent Protein) images of growing cell colonies. We use such tracking for both data extraction and dynamic modeling of intracellular processes. The techniques are based on optimization of energy functions, which simultaneously determines cell correspondences, while estimating the mapping functions. In addition to spatial mappings such

Victoria Gor; Michael Elowitz; T. Bacarian; Eric Mjolsness

2005-01-01

475

Optical techniques for tracking cells in vivo  

Microsoft Academic Search

I will focus on tracking cancer cells, immune cells, and stem cells in vivo using (i) intravital microscopy for 3D tissue imaging, and (ii) in vivo flow cytometry for detection and quantification of circulating cells. Cell tracking is the process of monitoring how certain cell populations move, or \\

Charles P. Lin

2011-01-01

476

Object tracking and classification in aerial videos  

NASA Astrophysics Data System (ADS)

In the intelligence community, aerial video has become one of the fastest growing data sources and it has been extensively used in intelligence, surveillance, reconnaissance, tactical and security applications. This paper presents a tracking approach to detect moving vehicles and person in such videos taken from aerial platform. In our approach, we combine the layer segmentation approach with background stabilization and post-tracking refinement to reliably detect small moving objects at the relatively low processing speed. For each individual moving object, a corresponding layer is created to maintain an independent appearance and motion model during the tracking process. After the online tracking process, we apply a post-tracking refinement process to link the track fragments into a long consistent track ID to further reduce false alarm and increase detection rate. Furthermore, a vehicle and person classifier is also integrated into the approach to identify the moving object categories. The classifier is based on image histogram of gradient (HOG), which is more reliable to illumination variation or camera automatic gain change. Finally, we report the results of our algorithms on a large scale of EO and IR data set collected from VIVID program, and the results show that our approach achieved a good and stable tracking performance on the data set that is more than eight hours.

Xiao, Jiangjian; Cheng, Hui; Feng, Han; Yang, Changjiang

2008-04-01

477

Monte Carlo simulation techniques for probabilistic tracking  

Microsoft Academic Search

Two novel approaches to probabilistic tracking using Monte Carlo simulation are presented. The first approach is a 3D shape encoded object tracking algorithm. The measurements are derived using the outputs of shape-encoded filters. The nonlinear state estimation is performed by solving the Zakai equation and we use the branching particle propagation method for computing the solution. The second approach is

Baoxin Li; Rama Chellappa; Hankyu Moon

2001-01-01

478

30 CFR 56.12042 - Track bonding.  

Code of Federal Regulations, 2010 CFR

...Resources 1 2010-07-01 2010-07-01 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...

2010-07-01

479

30 CFR 57.12042 - Track bonding.  

Code of Federal Regulations, 2010 CFR

...Resources 1 2010-07-01 2010-07-01 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...

2010-07-01

480

Video Tracking of Humans in Robotic Environments  

E-print Network

Video Tracking of Humans in Robotic Environments MASTER'S THESIS for obtaining the academic title at ISI-Hagenberg Handed in by: Andrei-Ovidiu Coman, Matrikelnummer: 0956887 Finished on: 15th September . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 Video Tracking 12 3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3

481

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

482

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

483

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

484

Personnel tracking using seismic sensors  

NASA Astrophysics Data System (ADS)

A method for the detection and localization of personnel using seismic sensors is described. This particular application of seismic signal processing is different from typical applications involving earthquakes or sonic well-logging, and thus requires the development of new techniques. The proposed approach consists of a matched filter-based detection algorithm, time of arrival association of detected footsteps from different sensors, and localization using a hyperbolic location estimator. This method was tested using data collected in southern New Hampshire from four vertical-axis geophones. The speed of sound at the test site was estimated using an impulsive source. Footsteps were reliably detected at ranges up to 30m. Localization errors were found to vary linearly with range, with an average estimation error of 8.4 m observed. With improvements in the sensitivity of the seismic sensors, this approach will yield reasonable position estimates of personnel for use in a tracking algorithm.

Richman, Michael S.; Deadrick, Douglas S.; Nation, Robert J.; Whitney, Scott

2001-09-01

485

Markov Tracking for Agent Coordination  

NASA Technical Reports Server (NTRS)

Partially observable Markov decision processes (POMDPs) axe an attractive representation for representing agent behavior, since they capture uncertainty in both the agent's state and its actions. However, finding an optimal policy for POMDPs in general is computationally difficult. In this paper we present Markov Tracking, a restricted problem of coordinating actions with an agent or process represented as a POMDP Because the actions coordinate with the agent rather than influence its behavior, the optimal solution to this problem can be computed locally and quickly. We also demonstrate the use of the technique on sequential POMDPs, which can be used to model a behavior that follows a linear, acyclic trajectory through a series of states. By imposing a "windowing" restriction that restricts the number of possible alternatives considered at any moment to a fixed size, a coordinating action can be calculated in constant time, making this amenable to coordination with complex agents.

Washington, Richard; Lau, Sonie (Technical Monitor)

1998-01-01

486

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

487

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

NASA Technical Reports Server (NTRS)

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

1972-01-01

488

Sheehan Suicidality Tracking Scale (Sheehan-STS)  

PubMed Central

Objective: Accurate and prospective assessments of treatment-emergent suicidal thoughts and behaviors are essential to both clinical care and randomized clinical trials. The Sheehan Suicidality Tracking Scale is a prospective, patient self-report or clinician-administered rating scale that tracks both treatment-emergent suicidal ideation and behaviors. The Sheehan Suicidality Tracking Scale was incorporated into a multicenter, randomized, double-blind, placebo-controlled, and active comparator study examining the efficacy of an experimental corticotropin-releasing factor antagonist (BMS-562086) for the treatment of generalized anxiety disorder. Method: The Sheehan Suicidality Tracking Scale was administered to subjects at baseline, Week 2, Week 4, and Week 8 or early termination. Subjects completed theSheehan Suicidality Tracking Scale by self report. The Sheehan Suicidality Tracking Scale was designated as an exploratory outcome measure in the study protocol, and post-hoc analyses were performed to examine the performance of the Sheehan Suicidality Tracking Scale. Results: A total of 82 subjects completed the Sheehan Suicidality Tracking Scale during the course of the study. Altogether, these subjects provided 297 completed Sheehan Suicidality Tracking Scale ratings across the study time points. Sixty-one subjects (n=25 placebo, n=24 BMS-562086, and n=12 escitalopram) had a baseline and at least one post-baseline Sheehan Suicidality Tracking Scale measurement. The mean change from baseline at Week 8 in the Sheehan Suicidality Tracking Scale total score was -0.10, -0.02, and -0.06 for escitalopram, placebo, and BMS-562086 groups, respectively. The sensitivity of the Sheehan Suicidality Tracking Scale and HAM-D Item #3 (suicide) for identifying subjects with suicidal thoughts or behaviors was 100 percent and 63 percent, respectively. Conclusions: The Sheehan Suicidality Tracking Scale may be a sensitive psychometric tool to prospectively assess for treatment-emergent suicidal thoughts and behaviors. Despite the small sample size and low occurrence of suicidal ideation during the course of this clinical trial, the self-reported Sheehan Suicidality Tracking Scale demonstrated increased sensitivity over the rater administered HAM-D Item #3 in identifying suicide related ideations and behaviors. Further research in larger study samples as well as in other psychiatric disorders are needed. PMID:19724740

2009-01-01

489

Phanerozoic, pre-Cretaceous thermotectonic events in southern Sweden revealed by fission track thermochronology  

Microsoft Academic Search

In shelf areas surrounding southern Sweden, offshore settings contain evidence of repeated subsidence and uplift during the Phanerozoic. Earlier published fission track (FT) studies in adjacent areas suggest extensive exhumation since the Late Paleozoic. The aim of this study is to reveal pre-Cretaceous thermotectonic events that affected the south-central part of the Fennoscandian Shield. Twenty-four apatite samples from the Precambrian

Charlotte Cederbom

2001-01-01

490

Identifying Fecal Sources in a Selected Catchment Reach Using Multiple Source-Tracking Tools  

Microsoft Academic Search

Given known limitations of current microbial source-tracking (MST) tools, emphasis on small, simple study areas may enhance in- terpretations of fecal contamination sources in streams. In this study, three MST tools—Escherichia coli repetitive element polymerase chain reaction (rep-PCR), coliphage typing, and Bacteroidales 16S rDNA host-associated markers—were evaluated in a selected reach of Plum Creek in south-central Nebraska. Water-quality samples were

Jason R. Vogel; Donald M. Stoeckel; Regina Lamendella; Ronald B. Zelt; Steven R. Walker

2007-01-01

491

Computer-based tracking of single sperm.  

PubMed

This paper describes a robust single sperm tracking algorithm (SSTA) that can be used in laser optical trapping and sperm motility studies. The algorithm creates a region of interest (ROI) centered about a sperm selected by the user. SSTA contrast enhances the ROI image and implements a modified four-class thresholding method to extract the tracked sperm as it transitions in and out of focus. The nearest neighbor method is complemented with a speed-check feature to aid tracking in the presence of additional sperm or other particles. SSTA has a collision-detection feature for real or perceived collision or near-miss cases between two sperm. Subsequent postcollision analysis employs three criteria to distinguish the tracked sperm in the image. The efficacy of SSTA is validated through examples and comparisons to commercially available computer-aided sperm tracking systems. PMID:17092158

Shi, Linda Z; Nascimento, Jaclyn M; Berns, Michael W; Botvinick, Elliot L

2006-01-01

492

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

493

Vibration characteristics of floating slab track  

NASA Astrophysics Data System (ADS)

Coupled equilibrium equations of suspended wheels and floating slab track system were solved with the fourth-order Runge-Kutta method to obtain the deflections, vibration velocities, and wheel-rail contact forces. The program was validated through several aspects. Cases with various vehicle speed, slab mass, and stiffness of slab bearing were analyzed to reveal the effects of slab bearing on track responses. The correlation between wheel-rail resonance and train speed was also discussed. It was found that rail deflections increase significantly as train speed increases. Although large slab mass may lower tuning frequency, it could also result in higher wheel-rail contact force and rail deflections. The floating slab track is effective in isolating loading above 10 Hz, which might present in some railway sections with irregularities. Adopting floating slab track for vibration control for environment along the railway may cause concerns about ride quality and track damages.

Kuo, Chen-Ming; Huang, Cheng-Hao; Chen, Yi-Yi

2008-11-01

494

Centralized Mouse Repositories  

PubMed Central

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

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

2013-01-01

495

Rare pediatric central neurocytomas.  

PubMed

Central neurocytoma is extremely rare in pediatrics. In a single institute's record, it represents about 0.2% of brain tumors in children. The treatment of central neurocytoma in children is not different from that for adult patients. Surgical resection is the mainstay of treatment. After complete resection, the long-term prognosis is excellent. Adjuvant radiation therapy or radiosurgery may be applied to residual or recurrent tumors. However, the exact indication for each modality should be refined by accumulation of clinical data for this rare disease in children. PMID:25432189

Phi, Ji Hoon; Kim, Dong Gyu

2015-01-01

496

ChildrensCentralCali  

Cancer.gov

Children’s Hospital Central California is excited to announce a new clinical opportunity due to the expansion of our Pediatric Psychology department. Children’s Hospital Central California is a 354 bed not-for-profit, state-of-the-art free standing Children’s Hospital. As a vital member of our Pediatric Psychology team the primary focus of this position will be on providing consultation-liaison services to our various medical inpatient units. There will also be opportunities for providing assessment and therapy services for our subspecialty clinics.

497

The Central Limit Theorem  

NSDL National Science Digital Library

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

Anderson-Cook, C.; Dorai-Raj, S.; Robinson, T.

2009-12-15

498

Tracking formulas and strategies for a receiver oriented dual-axis tracking toroidal heliostat  

SciTech Connect

A 4 m x 4 m toroidal heliostat with receiver oriented dual-axis tracking, also called spinning-elevation tracking, was developed as an auxiliary heat source for a hydrogen production system. A series of spinning-elevation tracking formulas have been derived for this heliostat. This included basic tracking formulas, a formula for the elevation angle for heliostat with a mirror-pivot offset, and a more general formula for the biased elevation angle. This paper presents the new tracking formulas in detail and analyzes the accuracy of applying a simplifying approximation. The numerical results show these receiver oriented dual-axis tracking formula approximations are accurate to within 2.5 x 10{sup -6} m in image plane. Some practical tracking strategies are discussed briefly. Solar images from the toroidal heliostat at selected times are also presented. (author)

Guo, Minghuan; Wang, Zhifeng; Liang, Wenfeng; Zhang, Xiliang; Zang, Chuncheng [Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences, Institute of Electrical Engineering, Beijing 100190 (China); Lu, Zhenwu; Wei, Xiudong [Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (CAS), Jilin 130033 (China)

2010-06-15

499

40 CFR 72.82 - Fast-track modifications.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Fast-track modifications. 72.82 Section...REGULATION Permit Revisions § 72.82 Fast-track modifications. The following procedures shall apply to all fast-track modifications. (a)...

2010-07-01

500

1 Introduction 2 2 Tracking: Fundamental Notions 2  

E-print Network

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.3 Multiple Modes, Randomized Search and Human Tracking . . . . . . . . . . . . . . . . . . . . 3 4 Tracking: Data Association for Human Tracking 5 4.1 Detecting Humans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.8.2 Modified Physics

Forsyth, David