WorldWideScience

Sample records for dumping ghost signals

  1. Beam dumping ghost signals in electric sweep scanners

    Energy Technology Data Exchange (ETDEWEB)

    Stockli, M.P.; /SNS Project, Oak Ridge /Tennessee U.; Leitner, M.; /LBL, Berkeley; Moehs, D.P.; /Fermilab; Keller, R.; /LBL, Berkeley; Welton, R.F.; /SNS Project, Oak Ridge

    2004-12-01

    Over the last 20 years many labs started to use Allison scanners to measure low-energy ion beam emittances. We show that large trajectory angles produce ghost signals due to the impact of the beamlet on the electric deflection plates. The strength of the ghost signal is proportional to the amount of beam entering the scanner. Depending on the ions and their velocity, ghost signals can have the opposite polarity as the main beam signals or the same polarity. These ghost signals are easily overlooked because they partly overlap the real signals, they are mostly below the 1% level, and they are often hidden in the noise. However, they cause significant errors in emittance estimates because they are associated with large trajectory angles. The strength of ghost signals, and the associated errors, can be drastically reduced with a simple modification of the deflection plates.

  2. Ghost signals in Allison emittance scanners

    Energy Technology Data Exchange (ETDEWEB)

    Stockli, Martin P.; /SNS Project, Oak Ridge /Tennessee U.; Leitner, M.; /LBL, Berkeley; Moehs, D.P.; /Fermilab; Keller, R.; /LBL, Berkeley; Welton, R.F.; /SNS Project, Oak

    2004-12-01

    For over 20 years, Allison scanners have been used to measure emittances of low-energy ion beams. We show that scanning large trajectory angles produces ghost signals caused by the sampled beamlet impacting on an electric deflection plate. The ghost signal strength is proportional to the amount of beam entering the scanner. Depending on the ions, and their velocity, the ghost signals can have the opposite or the same polarity as the main beam signals. The ghost signals cause significant errors in the emittance estimates because they appear at large trajectory angles. These ghost signals often go undetected because they partly overlap with the real signals, are mostly below the 1% level, and often hide in the noise. A simple deflection plate modification is shown to reduce the ghost signal strength by over 99%.

  3. Ghosting

    DEFF Research Database (Denmark)

    Rose, Jørgen

    1997-01-01

    In this report the different aspects of ghosting is discussed. Thermal bridges can produce these effects, and the report deals with an example of a building where the problems occured. The problem is discussed in detail, and some suggestions are given for getting rid of it or avoiding it all...

  4. Dumping Syndrome

    Science.gov (United States)

    ... System & How it Works Digestive Diseases A-Z Dumping Syndrome What is dumping syndrome? Dumping syndrome occurs when food, especially sugar, ... the colon and rectum—and anus. What causes dumping syndrome? Dumping syndrome is caused by problems with ...

  5. Notch signaling and ghost cell fate in the calcifying cystig odontogenic tumor

    Directory of Open Access Journals (Sweden)

    Siar CH

    2011-11-01

    Full Text Available Abstract Notch signaling is an evolutionarily conserved mechanism that enables adjacent cells to adopt different fates. Ghost cells (GCs are anucleate cells with homogeneous pale eosinophilic cytoplasm and very pale to clear central areas (previous nucleus sites. Although GCs are present in a variety of odontogenic lesions notably the calcifying cystic odontogenic tumor (GCOT, their nature and process of formation remains elusive. The aim of this study was to investigate the role of Notch signaling in the cell fate specification of GCs in CCOT. Immunohistochemical staining for four Notch receptors (Notch1, Notch2, Notch3 and Notch4 and three ligands (Jagged1, Jagged2 and Delta1 was performed on archival tissues of five CCOT cases. Level of positivity was quantified as negative (0, mild (+, moderate (2+ and strong (3+. Results revealed that GCs demonstrated overexpression for Notch1 and Jagged1 suggesting that Notch1Jagged1 signaling might serve as the main transduction mechanism in cell fate decision for GCs in CCOT. Protein localizations were largely membranous and/or cytoplasmic. Mineralized GCs also stained positive implicating that the calcification process might be associated with upregulation of these molecules. The other Notch receptors and ligands were weak to absent in GCs and tumoral epithelium. Stromal endothelium and fibroblasts were stained variably positive.

  6. Jeans' Ghost

    CERN Document Server

    Gumrukcuoglu, A Emir; Sotiriou, Thomas P

    2016-01-01

    We show that a massless canonical scalar field minimally coupled to general relativity can become a tachyonic ghost at low energies around a background in which the scalar's gradient is spacelike. By performing a canonical transformation we demonstrate that this low energy ghost can be recast, at the level of the action, in a form of a fluid that undergoes a Jeans-like instability affecting only modes with large wavelength. This illustrates that low-energy tachyonic ghosts do not lead to a catastrophic quantum vacuum instability, unlike the usual high-energy ghost degrees of freedom.

  7. Social dumping

    DEFF Research Database (Denmark)

    Pedersen, Klaus

    2010-01-01

    bidrag til, at OK-2010 "landes" fredeligt, fordi aftalen giver fagforeningerne en væsentlig indrømmelse i indsatsen mod social dumping. Aftalen har rigtignok til formål at imødekomme et af fagbevægelsens centrale overenskomstkrav om nye redskaber i indsatsen mod "social dumping". Men hvad er det aftalen...

  8. Correspondence Differential Ghost Imaging

    CERN Document Server

    Li, Ming-Fei; Luo, Kai-Hong; Wu, Ling-An; Fan, Heng

    2013-01-01

    Experimental data with digital masks and a theoretical analysis are presented for a nonlocal imaging scheme that we name correspondence differential ghost imaging (CDGI). It is shown that by conditional averaging of the information from the reference detector but with the negative signals inverted, the quality of the reconstructed images is, in general, superior to all other ghost imaging (GI) methods to date. The advantages of both differential GI and correspondence GI are combined, plus less data and shorter computation time are required to obtain equivalent quality images under the same conditions. This CDGI method offers a general approach applicable to all GI techniques, especially when objects with continuous gray tones are involved.

  9. Ghost-in-the-Machine reveals human social signals for human–robot interaction

    Science.gov (United States)

    Loth, Sebastian; Jettka, Katharina; Giuliani, Manuel; de Ruiter, Jan P.

    2015-01-01

    We used a new method called “Ghost-in-the-Machine” (GiM) to investigate social interactions with a robotic bartender taking orders for drinks and serving them. Using the GiM paradigm allowed us to identify how human participants recognize the intentions of customers on the basis of the output of the robotic recognizers. Specifically, we measured which recognizer modalities (e.g., speech, the distance to the bar) were relevant at different stages of the interaction. This provided insights into human social behavior necessary for the development of socially competent robots. When initiating the drink-order interaction, the most important recognizers were those based on computer vision. When drink orders were being placed, however, the most important information source was the speech recognition. Interestingly, the participants used only a subset of the available information, focussing only on a few relevant recognizers while ignoring others. This reduced the risk of acting on erroneous sensor data and enabled them to complete service interactions more swiftly than a robot using all available sensor data. We also investigated socially appropriate response strategies. In their responses, the participants preferred to use the same modality as the customer’s requests, e.g., they tended to respond verbally to verbal requests. Also, they added redundancy to their responses, for instance by using echo questions. We argue that incorporating the social strategies discovered with the GiM paradigm in multimodal grammars of human–robot interactions improves the robustness and the ease-of-use of these interactions, and therefore provides a smoother user experience. PMID:26582998

  10. Ghost-in-the-Machine reveals human social signals for human-robot interaction.

    Science.gov (United States)

    Loth, Sebastian; Jettka, Katharina; Giuliani, Manuel; de Ruiter, Jan P

    2015-01-01

    We used a new method called "Ghost-in-the-Machine" (GiM) to investigate social interactions with a robotic bartender taking orders for drinks and serving them. Using the GiM paradigm allowed us to identify how human participants recognize the intentions of customers on the basis of the output of the robotic recognizers. Specifically, we measured which recognizer modalities (e.g., speech, the distance to the bar) were relevant at different stages of the interaction. This provided insights into human social behavior necessary for the development of socially competent robots. When initiating the drink-order interaction, the most important recognizers were those based on computer vision. When drink orders were being placed, however, the most important information source was the speech recognition. Interestingly, the participants used only a subset of the available information, focussing only on a few relevant recognizers while ignoring others. This reduced the risk of acting on erroneous sensor data and enabled them to complete service interactions more swiftly than a robot using all available sensor data. We also investigated socially appropriate response strategies. In their responses, the participants preferred to use the same modality as the customer's requests, e.g., they tended to respond verbally to verbal requests. Also, they added redundancy to their responses, for instance by using echo questions. We argue that incorporating the social strategies discovered with the GiM paradigm in multimodal grammars of human-robot interactions improves the robustness and the ease-of-use of these interactions, and therefore provides a smoother user experience.

  11. Ghost-in-the-Machine Reveals Human Social Signals for Human-Robot Interaction

    Directory of Open Access Journals (Sweden)

    Sebastian eLoth

    2015-11-01

    Full Text Available We used a new method called Ghost-in-the-Machine (GiM to investigate social interactions with a robotic bartender taking orders for drinks and serving them. Using the GiM paradigm allowed us to identify how human participants recognise the intentions of customers on the basis of the output of the robotic recognisers. Specifically, we measured which recogniser modalities (e.g., speech, the distance to the bar were relevant at different stages of the interaction. This provided insights into human social behaviour necessary for the development of socially competent robots. When initiating the drink-order interaction, the most important recognisers were those based on computer vision. When drink orders were being placed, however, the most important information source was the speech recognition. Interestingly, the participants used only a subset of the available information, focussing only on a few relevant recognisers while ignoring others. This reduced the risk of acting on erroneous sensor data and enabled them to complete service interactions more swiftly than a robot using all available sensor data. We also investigated socially appropriate response strategies. In their responses, the participants preferred to use the same modality as the customer’s requests, e.g., they tended to respond verbally to verbal requests. Also, they added redundancy to their responses, for instance by using echo questions. We argue that incorporating the social strategies discovered with the GiM paradigm in multimodal grammars of human-robot interactions improves the robustness and the ease-of-use of these interactions, and therefore provides a smoother user experience.

  12. Computational temporal ghost imaging

    CERN Document Server

    Devaux, Fabrice; Denis, Severine; Lantz, Eric

    2016-01-01

    We present a very simple device, inspired by computational ghost imaging, that allows the re- trieval of a single non-reproducible, periodic or non-periodic, temporal signal. The reconstruction is performed by a single shot, spatially multiplexed, measurement of the spatial intensity correlations between computer-generated random images and the images modulated by the temporal signal, recorded and summed on a chip CMOS camera used with no temporal resolution.

  13. Phylogenetic comparative analysis of electric communication signals in ghost knifefishes (Gymnotiformes: Apteronotidae).

    Science.gov (United States)

    Turner, Cameron R; Derylo, Maksymilian; de Santana, C David; Alves-Gomes, José A; Smith, G Troy

    2007-12-01

    Electrocommunication signals in electric fish are diverse, easily recorded and have well-characterized neural control. Two signal features, the frequency and waveform of the electric organ discharge (EOD), vary widely across species. Modulations of the EOD (i.e. chirps and gradual frequency rises) also function as active communication signals during social interactions, but they have been studied in relatively few species. We compared the electrocommunication signals of 13 species in the largest gymnotiform family, Apteronotidae. Playback stimuli were used to elicit chirps and rises. We analyzed EOD frequency and waveform and the production and structure of chirps and rises. Species diversity in these signals was characterized with discriminant function analyses, and correlations between signal parameters were tested with phylogenetic comparative methods. Signals varied markedly across species and even between congeners and populations of the same species. Chirps and EODs were particularly evolutionarily labile, whereas rises differed little across species. Although all chirp parameters contributed to species differences in these signals, chirp amplitude modulation, frequency modulation (FM) and duration were particularly diverse. Within this diversity, however, interspecific correlations between chirp parameters suggest that mechanistic trade-offs may shape some aspects of signal evolution. In particular, a consistent trade-off between FM and EOD amplitude during chirps is likely to have influenced the evolution of chirp structure. These patterns suggest that functional or mechanistic linkages between signal parameters (e.g. the inability of electromotor neurons increase their firing rates without a loss of synchrony or amplitude of action potentials) constrain the evolution of signal structure.

  14. Dumping Syndrome

    Science.gov (United States)

    ... stomach move to your small intestine in an uncontrolled, abnormally fast manner. This is most often related to changes in your stomach associated with surgery. Dumping syndrome can occur after any stomach operation or removal of the esophagus (esophagectomy). Gastric bypass surgery for ...

  15. Paraxial ghost image analysis

    Science.gov (United States)

    Abd El-Maksoud, Rania H.; Sasian, José M.

    2009-08-01

    This paper develops a methodology to model ghost images that are formed by two reflections between the surfaces of a multi-element lens system in the paraxial regime. An algorithm is presented to generate the ghost layouts from the nominal layout. For each possible ghost layout, paraxial ray tracing is performed to determine the ghost Gaussian cardinal points, the size of the ghost image at the nominal image plane, the location and diameter of the ghost entrance and exit pupils, and the location and diameter for the ghost entrance and exit windows. The paraxial ghost irradiance point spread function is obtained by adding up the irradiance contributions for all ghosts. Ghost simulation results for a simple lens system are provided. This approach provides a quick way to analyze ghost images in the paraxial regime.

  16. Temporal ghost imaging with twin photons

    Science.gov (United States)

    Denis, Séverine; Moreau, Paul-Antoine; Devaux, Fabrice; Lantz, Eric

    2017-03-01

    We use twin photons generated by spontaneous parametric down conversion to perform temporal ghost imaging of a single time signal. The retrieval of a binary signal containing eight bits is performed with an error rate below 1%.

  17. Dump assembly

    Science.gov (United States)

    Goldmann, Louis H.

    1986-01-01

    A dump assembly having a fixed conduit and a rotatable conduit provided with overlapping plates, respectively, at their adjacent ends. The plates are formed with openings, respectively, normally offset from each other to block flow. The other end of the rotatable conduit is provided with means for securing the open end of a filled container thereto. Rotation of the rotatable conduit raises and inverts the container to empty the contents while concurrently aligning the conduit openings to permit flow of material therethrough.

  18. Thermal light ghost imaging based on morphology

    Science.gov (United States)

    Chen, Zhipeng; Shi, Jianhong; Zeng, Guihua

    2016-12-01

    The quality of thermal light ghost imaging could be degraded by undersampling noise. This kind of noise is generated because of finite sampling, which could reduce the signal-to-noise ratio (SNR) of ghost imaging and submerge object information. In order to reduce the undersampling noise, we propose a thermal light ghost imaging scheme based on the morphology (GIM). In this scheme, the average size of the undersampling noise can be obtained by computing the second-order correlation function of the ghost imaging system. According to the average size of the undersampling noise, the corresponding structure element can be designed and used in the morphological filter; then, the GIM reconstructed image can be obtained. The experiment results show that the peak signal-to-noise ratio of the GIM reconstructed image can increased by 80% than that of conventional ghost imaging for the same number of measurements.

  19. Fermionic ghost imaging

    CERN Document Server

    Liu, Jianbin; Zheng, Huaibin; Chen, Hui; Li, Fu-li; Xu, Zhuo

    2016-01-01

    Ghost imaging with thermal fermions is calculated based on two-particle interference in Feynman's path integral theory. It is found that ghost imaging with thermal fermions can be simulated by ghost imaging with thermal bosons and classical particles. Photons in pseudothermal light are employed to experimentally study fermionic ghost imaging. Ghost imaging with thermal bosons and fermions is discussed based on the point-to-point (spot) correlation between the object and image planes. The employed method offers an efficient guidance for future ghost imaging with real thermal fermions, which may also be generalized to study other second-order interference phenomena with fermions.

  20. Studies for the H0/H− dump for Linac4: energy deposition, induced radioactivity and BLM signal

    CERN Document Server

    Versaci, R; Silari, M; Chamizo, R

    2010-01-01

    This note presents an estimate of the energy deposition and activation for the H0/H− dump for Linac4, the new CERN 160 MeV injector linac. Residual dose rates at different cooling times were calculated as well. The aim of the first part of this study was to compare the behavior of three different materials (graphite, boron nitride and aluminum nitride), in order to identify the most suitable for the dump. For the second part, a dedicated study has been done in order to test whether it could be feasible to insert Beam Loss Monitors to check the status of the beam, All calculations were performed with the Monte Carlo particle transport code FLUKA.

  1. Magnified time-domain ghost imaging

    Science.gov (United States)

    Ryczkowski, Piotr; Barbier, Margaux; Friberg, Ari T.; Dudley, John M.; Genty, Goëry

    2017-04-01

    Ghost imaging allows the imaging of an object without directly seeing this object. Originally demonstrated in the spatial domain, it was recently shown that ghost imaging can be transposed into the time domain to detect ultrafast signals, even in the presence of distortion. We propose and experimentally demonstrate a temporal ghost imaging scheme which generates a 5× magnified ghost image of an ultrafast waveform. Inspired by shadow imaging in the spatial domain and building on the dispersive Fourier transform of an incoherent supercontinuum in an optical fiber, the approach overcomes the resolution limit of standard time-domain ghost imaging generally imposed by the detectors speed. The method can be scaled up to higher magnification factors using longer fiber lengths and light source with shorter duration.

  2. Ghost Remains After Black Hole Eruption

    Science.gov (United States)

    2009-05-01

    NASA's Chandra X-ray Observatory has found a cosmic "ghost" lurking around a distant supermassive black hole. This is the first detection of such a high-energy apparition, and scientists think it is evidence of a huge eruption produced by the black hole. This discovery presents astronomers with a valuable opportunity to observe phenomena that occurred when the Universe was very young. The X-ray ghost, so-called because a diffuse X-ray source has remained after other radiation from the outburst has died away, is in the Chandra Deep Field-North, one of the deepest X-ray images ever taken. The source, a.k.a. HDF 130, is over 10 billion light years away and existed at a time 3 billion years after the Big Bang, when galaxies and black holes were forming at a high rate. "We'd seen this fuzzy object a few years ago, but didn't realize until now that we were seeing a ghost", said Andy Fabian of the Cambridge University in the United Kingdom. "It's not out there to haunt us, rather it's telling us something - in this case what was happening in this galaxy billions of year ago." Fabian and colleagues think the X-ray glow from HDF 130 is evidence for a powerful outburst from its central black hole in the form of jets of energetic particles traveling at almost the speed of light. When the eruption was ongoing, it produced prodigious amounts of radio and X-radiation, but after several million years, the radio signal faded from view as the electrons radiated away their energy. HDF 130 Chandra X-ray Image of HDF 130 However, less energetic electrons can still produce X-rays by interacting with the pervasive sea of photons remaining from the Big Bang - the cosmic background radiation. Collisions between these electrons and the background photons can impart enough energy to the photons to boost them into the X-ray energy band. This process produces an extended X-ray source that lasts for another 30 million years or so. "This ghost tells us about the black hole's eruption long after

  3. Phase modulation pseudocolor encoding ghost imaging

    Institute of Scientific and Technical Information of China (English)

    段德洋; 张路; 杜少将; 夏云杰

    2015-01-01

    We present a ghost imaging scheme that can obtain a good pseudocolor image of black-and-white objects. The essential idea is to use the multi-wavelength thermal light source and the phase modulation pseudocolor encoding technique, which overcomes the disadvantages of other methods involved the spatial filtering. Therefore, the pseudocolor ghost image achieved by this imaging scheme is better than that obtained by other methods in brightness, color, and signal-to-noise ratio.

  4. Dumping syndrome (image)

    Science.gov (United States)

    Dumping syndrome occurs when the contents of the stomach empty too quickly into the small intestine. The ... causing nausea, cramping, diarrhea, sweating, faintness, and palpitations. Dumping usually occurs after the consumption of too much ...

  5. Evolution of electric communication signals in the South American ghost knifefishes (Gymnotiformes: Apteronotidae): A phylogenetic comparative study using a sequence-based phylogeny.

    Science.gov (United States)

    Smith, Adam R; Proffitt, Melissa R; Ho, Winnie W; Mullaney, Claire B; Maldonado-Ocampo, Javier A; Lovejoy, Nathan R; Alves-Gomes, José A; Smith, G Troy

    2016-10-18

    The electric communication signals of weakly electric ghost knifefishes (Gymnotiformes: Apteronotidae) provide a valuable model system for understanding the evolution and physiology of behavior. Apteronotids produce continuous wave-type electric organ discharges (EODs) that are used for electrolocation and communication. The frequency and waveform of EODs, as well as the structure of transient EOD modulations (chirps), vary substantially across species. Understanding how these signals have evolved, however, has been hampered by the lack of a well-supported phylogeny for this family. We constructed a molecular phylogeny for the Apteronotidae by using sequence data from three genes (cytochrome c oxidase subunit 1, recombination activating gene 2, and cytochrome oxidase B) in 32 species representing 13 apteronotid genera. This phylogeny and an extensive database of apteronotid signals allowed us to examine signal evolution by using ancestral state reconstruction (ASR) and phylogenetic generalized least squares (PGLS) models. Our molecular phylogeny largely agrees with another recent sequence-based phylogeny and identified five robust apteronotid clades: (i) Sternarchorhamphus+Orthosternarchus, (ii) Adontosternarchus, (iii) Apteronotus+Parapteronotus, (iv) Sternarchorhynchus, and (v) a large clade including Porotergus, 'Apteronotus', Compsaraia, Sternarchogiton, Sternarchella, and Magosternarchus. We analyzed novel chirp recordings from two apteronotid species (Orthosternarchus tamandua and Sternarchorhynchus mormyrus), and combined data from these species with that from previously recorded species in our phylogenetic analyses. Some signal parameters in O. tamandua were plesiomorphic (e.g., low frequency EODs and chirps with little frequency modulation that nevertheless interrupt the EOD), suggesting that ultra-high frequency EODs and "big" chirps evolved after apteronotids diverged from other gymnotiforms. In contrast to previous studies, our PGLS analyses using the

  6. Ghost cell lesions

    Directory of Open Access Journals (Sweden)

    E Rajesh

    2015-01-01

    Full Text Available Ghost cells have been a controversy for a long time. Ghost cell is a swollen/enlarged epithelial cell with eosnophilic cytoplasm, but without a nucleus. In routine H and E staining these cells give a shadowy appearance. Hence these cells are also called as shadow cells or translucent cells. The appearance of these cells varies from lesion to lesion involving odontogenic and nonodontogenic lesions. This article review about the origin, nature and significance of ghost cells in different neoplasms.

  7. Ghost cell odontogenic carcinoma.

    NARCIS (Netherlands)

    Nazaretian, S.P.; Schenberg, M.E.; Simpson, I.; Slootweg, P.J.

    2007-01-01

    Ghost cell odontogenic carcinoma (GCOC) is the malignant counterpart of calcifying cystic odontogenic tumour and dentinogenic ghost cell tumour. This is the case of a middle-aged male who presented with a slow-growing maxillary tumour. He was asymptomatic until pain symptoms developed prior to initi

  8. Anti-Dumping on and from China

    Institute of Scientific and Technical Information of China (English)

    Patrick; H.Zhao

    2007-01-01

    The past years saw an increased cases of anti-dumping on China mostly from the developed countries,some from developing countries.But Pakistan,a friendly neighbor to China,recently adds up to that list of ranks for an anti-dumping investigation on China.It is the national interests that count most,after all. It gives out a signal that anti-dumping would be a frequent tool to defend or to attack. Evidences show China is a target for this trade remedy,but is also targeting others.

  9. Differential ghost imaging in time domain

    Science.gov (United States)

    O-oka, Yoshiki; Fukatsu, Susumu

    2017-08-01

    Differential ghost imaging is attempted in time domain, i.e., temporal differential ghost imaging (TDGI), using pseudo-randomized light pulses and a temporal object consisting of no-return-to-zero bit patterns of varying duty. Evaluation of the signal-to-noise characteristics by taking into account errors due to false cross-correlation between the reference and the bucket detector readings indicates that the TDGI outperforms its non-differential counterpart, i.e., time-domain GI, in terms of consistently high and even duty-independent signal-to-noise ratios that are achieved.

  10. New Mexico Ghost Towns

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — This data provides locations and non-spatial attributes of many ghost towns in the State of New Mexico, compiled from various sources. Locations provided with...

  11. Dentinogenic ghost cell tumor

    Directory of Open Access Journals (Sweden)

    Singhaniya Shikha

    2009-01-01

    Full Text Available Dentinogenic ghost cell tumor (DGCT is a rare tumorous form of calcifying odontogenic cyst and only a small number of cases have been described. It is a locally invasive neoplasm that is characterized by ameloblastoma-like epithelial islands, ghost cells and dentinoid. The present report describes a case of a 21-year-old male with a tumor in the posterior region of the mandible, showing features of DGCT.

  12. Ghost fringe removal techniques using Lissajous data presentation

    Science.gov (United States)

    Erskine, David; Eggert, Jon; Celliers, Peter; Hicks, Damien

    2017-01-01

    Unwanted reflection of laser light from target windows can produce an additional component to the VISAR fringe record that can obscure and complicate the true signal. Accurately removing this so-called ghost component is essential for achieving high accuracy EOS measurements, especially when the true signal is only weakly reflected from the shock front. Independent of the choice of algorithm for processing the raw data into a complex fringe signal, we have found it beneficial to plot this signal as a Lissajous and seek the true center of this curve, since the ghost contribution is solved by a translation in the complex plane that recenters the Lissajous. For continuous velocity histories, we find that plotting the fringe visibility vs nonfringing intensity and optimizing linearity is a valuable tool for determining the proper ghost offsets. For discontinuous velocity histories, we have developed methods which relate the results of two VISARs having different velocity per fringe proportionalities to find the ghost offset.

  13. Weighted Integrate-And-Dump Filter

    Science.gov (United States)

    Sadr, Ramin

    1989-01-01

    Digital weighted integrate-and-dump filter (WIDF) proposed for detection of weak rectangular-pulse signals corrupted by additive white Gaussian noise. Received signal first low-pass prefiltered, and samples taken at multiple of symbol frequency. Improved performance means lower sampling and processing rates used for given symbol rate, reducing cost of system.

  14. Ghost Imaging with Atoms

    CERN Document Server

    Khakimov, R I; Shin, D K; Hodgman, S S; Dall, R G; Baldwin, K G H; Truscott, A G

    2016-01-01

    Ghost imaging is a technique -- first realized in quantum optics -- in which the image emerges from cross-correlation between particles in two separate beams. One beam passes through the object to a bucket (single-pixel) detector, while the second beam's spatial profile is measured by a high resolution (multi-pixel) detector but never interacts with the object. Neither detector can reconstruct the image independently. However, until now ghost imaging has only been demonstrated with photons. Here we report the first realisation of ghost imaging of an object using massive particles. In our experiment, the two beams are formed by correlated pairs of ultracold metastable helium atoms, originating from two colliding Bose-Einstein condensates (BECs) via $s$-wave scattering. We use the higher-order Kapitza-Dirac effect to generate the large number of correlated atom pairs required, enabling the creation of a ghost image with good visibility and sub-millimetre resolution. Future extensions could include ghost interfe...

  15. GHOST balloons around Antarctica

    Science.gov (United States)

    Stearns, Charles R.

    1988-01-01

    The GHOST balloon position as a function of time data shows that the atmospheric circulation around the Antarctic Continent at the 100 mb and 200 mb levels is complex. The GHOST balloons supposedly follow the horizontal trajectory of the air at the balloon level. The position of GHOST balloon 98Q for a three month period in 1968 is shown. The balloon moved to within 2 deg of the South Pole on 1 October 1968 and then by 9 December 1968 was 35 deg from the South Pole and close to its position on 1 September 1968. The balloon generally moved from west to east but on two occasions moved in the opposite direction for a few days. The latitude of GHOST balloons 98Q and 149Z which was at 200 mb is given. Both balloons tended to get closer to the South Pole in September and October. Other GHOST balloons at the same pressure and time period may not indicate similar behavior.

  16. Ocean Dumping: International Treaties

    Science.gov (United States)

    The London Convention and London Protocol are global treaties to protect the marine environment from pollution caused by the ocean dumping of wastes. The Marine, Protection, Research and Sanctuaries Act implements the requirements of the LC.

  17. The beam dump tunnels

    CERN Multimedia

    Patrice Loïez

    2002-01-01

    In these images workers are digging the tunnels that will be used to dump the counter-circulating beams. Travelling just a fraction under the speed of light, the beams at the LHC will each carry the energy of an aircraft carrier travelling at 12 knots. In order to dispose of these beams safely, a beam dump is used to extract the beam and diffuse it before it collides with a radiation shielded graphite target.

  18. Understanding ghost interference

    Science.gov (United States)

    Qureshi, Tabish; Chingangbam, Pravabati; Shafaq, Sheeba

    2016-08-01

    The ghost interference observed for entangled photons is theoretically analyzed using wave-packet dynamics. It is shown that ghost interference is a combined effect of virtual double-slit creation due to entanglement, and quantum erasure of which-path information for the interfering photon. For the case where the two photons are of different color, it is shown that fringe width of the interfering photon depends not only on its own wavelength, but also on the wavelength of the other photon which it is entangled with.

  19. Ghost imaging with different frequencies through non-degenerated four-wave mixing.

    Science.gov (United States)

    Yu, Ya; Wang, Chengyuan; Liu, Jun; Wang, Jinwen; Cao, Mingtao; Wei, Dong; Gao, Hong; Li, Fuli

    2016-08-08

    As a novel imaging method, ghost imaging has been widely explored in various fields of research, such as lensless ghost imaging, computational ghost imaging, turbulence-free ghost imaging. Recently, ghost imaging in non-degenerated system with pseudo-thermal light has been discussed theoretically, however, to our best knowledge, no experimental evidence has been proven yet. In this paper, we propose a new approach to realize ghost imaging with different frequencies, which are generated through a non-degenerated four-wave mixing(FWM) process in Rb vapor. In our experiment, by employing pseudo-thermal light as the probe beam, we found that the generated FWM signal has a strong second-order correlation with the original thermal light. On basis of that, we successfully implement non-degenerate ghost imaging, and reconstruct highly similar images of objects.

  20. Getting started with Ghost

    CERN Document Server

    Bracey, Kezz; Balderston, David

    2014-01-01

    If you are new to Ghost, this book is ideal for you. You might be completely new to content management systems or you might have experience with others such as WordPress. Some knowledge of web design basics such as HTML and CSS will be useful, but the book is designed so you can enter at the point relevant to you.

  1. Ghost Cell Tumors.

    Science.gov (United States)

    Sheikh, Jason; Cohen, Molly D; Ramer, Naomi; Payami, Ali

    2017-04-01

    Ghost cell tumors are a family of lesions that range in presentation from cyst to solid neoplasm and in behavior from benign to locally aggressive or metastatic. All are characterized by the presence of ameloblastic epithelium, ghost cells, and calcifications. This report presents the cases of a 14-year-old girl with a calcifying cystic odontogenic tumor (CCOT) and a 65-year-old woman with a peripheral dentinogenic ghost cell tumor (DGCT) with dysplastic changes, a rare locally invasive tumor of odontogenic epithelium. The first patient presented with a 1-year history of slowly progressing pain and swelling at the left body of the mandible. Initial panoramic radiograph displayed a mixed radiolucent and radiopaque lesion. An incisional biopsy yielded a diagnosis of CCOT. Decompression of the mass was completed; after 3 months, it was enucleated and immediately grafted with bone harvested from the anterior iliac crest. The second patient presented with a 3-month history of slowly progressing pain and swelling at the left body of the mandible. Initial panoramic radiograph depicted a mixed radiolucent and radiopaque lesion with saucerization of the buccal mandibular cortex. An incisional biopsy examination suggested a diagnosis of DGCT because of the presence of ghost cells, dentinoid, and islands of ameloblastic epithelium. Excision of the mass with peripheral ostectomy was completed. At 6 and 12 months of follow-up, no evidence of recurrence was noted.

  2. Strindberg's Ghost Sonata

    NARCIS (Netherlands)

    Tornqvist, Egil

    2000-01-01

    Generally considered one of milestones in the development of modern drama, August Strindberg's chamber play The Ghost Sonata (1907) has variously been hailed as the first expressionist, surrealist and absurdist drama.In this monograph of the play as text and as performance - the first of its kind -

  3. Ghost imaging with atoms

    Science.gov (United States)

    Khakimov, R. I.; Henson, B. M.; Shin, D. K.; Hodgman, S. S.; Dall, R. G.; Baldwin, K. G. H.; Truscott, A. G.

    2016-12-01

    Ghost imaging is a counter-intuitive phenomenon—first realized in quantum optics—that enables the image of a two-dimensional object (mask) to be reconstructed using the spatio-temporal properties of a beam of particles with which it never interacts. Typically, two beams of correlated photons are used: one passes through the mask to a single-pixel (bucket) detector while the spatial profile of the other is measured by a high-resolution (multi-pixel) detector. The second beam never interacts with the mask. Neither detector can reconstruct the mask independently, but temporal cross-correlation between the two beams can be used to recover a ‘ghost’ image. Here we report the realization of ghost imaging using massive particles instead of photons. In our experiment, the two beams are formed by correlated pairs of ultracold, metastable helium atoms, which originate from s-wave scattering of two colliding Bose-Einstein condensates. We use higher-order Kapitza-Dirac scattering to generate a large number of correlated atom pairs, enabling the creation of a clear ghost image with submillimetre resolution. Future extensions of our technique could lead to the realization of ghost interference, and enable tests of Einstein-Podolsky-Rosen entanglement and Bell’s inequalities with atoms.

  4. Strindberg's Ghost Sonata

    NARCIS (Netherlands)

    Törnqvist, Egil

    2000-01-01

    Generally considered one of milestones in the development of modern drama, August Strindberg's chamber play The Ghost Sonata (1907) has variously been hailed as the first expressionist, surrealist and absurdist drama. rIn this monograph of the play as text and as performance - the first of its kind

  5. Robust EPI Nyquist ghost elimination via spatial and temporal encoding.

    Science.gov (United States)

    Hoge, W Scott; Tan, Huan; Kraft, Robert A

    2010-12-01

    Nyquist ghosts are an inherent artifact in echo planar imaging acquisitions. An approach to robustly eliminate Nyquist ghosts is presented that integrates two previous Nyquist ghost correction techniques: temporal domain encoding (phase labeling for additional coordinate encoding: PLACE and spatial domain encoding (phased array ghost elimination: PAGE). Temporal encoding modulates the echo planar imaging acquisition trajectory from frame to frame, enabling one to interleave data to remove inconsistencies that occur between sampling on positive and negative gradient readouts. With PLACE, one can coherently combine the interleaved data to cancel residual Nyquist ghosts. If the level of ghosting varies significantly from image to image, however, the signal cancellation that occurs with PLACE can adversely affect SNR-sensitive applications such as perfusion imaging with arterial spin labeling. This work proposes integrating PLACE into a PAGE-based reconstruction process to yield significantly better Nyquist ghost correction that is more robust than PLACE or PAGE alone. The robustness of this method is demonstrated in the presence of magnetic field drift with an in-vivo arterial spin labeling perfusion experiment.

  6. Beam dump experiment at future electron–positron colliders

    Directory of Open Access Journals (Sweden)

    Shinya Kanemura

    2015-12-01

    Full Text Available We propose a new beam dump experiment at future colliders with electron (e− and positron (e+ beams, BDee, which will provide a new possibility to search for hidden particles, like hidden photon. If a particle detector is installed behind the beam dump, it can detect the signal of in-flight decay of the hidden particles produced by the scatterings of e± beams off materials for dumping. We show that, compared to past experiments, BDee (in particular BDee at e+e− linear collider significantly enlarges the parameter region where the signal of the hidden particle can be discovered.

  7. Ghost Imaging of Space Objects Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The NIAC research effort entitled “The Ghost Imaging of Space Objects” has been inspired by the original 1995 Ghost Imaging and Ghost Diffraction...

  8. Ghost Imaging Using Orbital Angular Momentum

    Institute of Scientific and Technical Information of China (English)

    赵生妹; 丁建; 董小亮; 郑宝玉

    2011-01-01

    We present a novel encoding scheme in a ghost-imaging system using orbital angular momentum. In the signal arm, object spatial information is encoded as a phase matrix. For an N-grey-scale object, different phase matrices, varying from 0 to K with increment n/N, are used for different greyscales, and then they are modulated to a signal beam by a spatial light modulator. According to the conservation of the orbital angular momentum in the ghost imaging system, these changes will give different coincidence rates in measurement, and hence the object information can be extracted in the idler arm. By simulations and experiments, the results show that our scheme can improve the resolution of the image effectively. Compared with another encoding method using orbital angular momentum, our scheme has a better performance for both characters and the image object.%We present a novel encoding scheme in a ghost-imaging system using orbital angular momentum.In the signal arm,object spatial information is encoded as a phase matrix.For an N-grey-scale object,different phase matrices,varying from 0 to π with increment π/N,are used for different greyscales,and then they are modulated to a signal beam by a spatial light modulator.According to the conservation of the orbital angular momentum in the ghost imaging system,these changes will give different coincidence rates in measurement,and hence the object information can be extracted in the idler arm.By simulations and experiments,the results show that our scheme can improve the resolution of the image effectively.Compared with another encoding method using orbital angular momentum,our scheme has a better performance for both characters and the image object.

  9. The "Ghostly" Quantum Worlds

    CERN Document Server

    Dugic, M

    2011-01-01

    The quantum Universe can be decomposed into subsystems in different ways. We consider the global linear-canonical-transformations-based decompositions (structures) of the Universe. These structures bear the same physical time and the common the fundamental physical law--the Schrodinger law. The Universe quantum state is unique in every instant of time yet bearing the different forms for the different structures of the Universe. This simple corollary of the universally valid quantum mechanics points out that the intelligent agents in a structure may (globally) affect the other structures--the other "worlds". Locally considered non-spontaneous, such effects may seem "ghostly" within the alternative worlds. This picture of the one and the unique quantum Universe is competitive with both the Everett MWI as well as with the Bohmian pilot-wave interpretation, not yet being inconsistent with the "state collapse" interpretation of quantum mechanics. The "ghostly worlds" interpretation here we introduce may prove irre...

  10. Dump valve assembly

    Science.gov (United States)

    Owen, T.J.

    1984-01-01

    A dump valve assembly comprising a body having a bore defined by a tapered wall and a truncated spherical valve member adapted to seat along a spherical surface portion thereof against said tapered wall. Means are provided for pivoting said valve member between a closed position engagable with said tapered wall and an open position disengaged therefrom.

  11. Getting Dumped On

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Chinese shoe manufacturers cry foul over anti-dumping duties imposed by the EU and set up an alliance to lobby for an overturn Hong Guangsheng, General Manager of Guangzhou Yunfang Shoes Co., is feeling the heat over his company's exports to Europe. According to a contract he signed with an Italian client in early April, the vol-

  12. Ghost quintessence in fractal gravity

    Indian Academy of Sciences (India)

    Habib Abedi; Mustafa Salti

    2015-04-01

    In this study, using the time-like fractal theory of gravity, we mainly focus on the ghost dark energy model which was recently suggested to explain the present acceleration of the cosmic expansion. Next, we establish a connection between the quintessence scalar field and fractal ghost dark energy density. This correspondence allows us to reconstruct the potential and the dynamics of a fractal canonical scalar field (the fractal quintessence) according to the evolution of ghost dark energy density.

  13. Quantum Ghost Imaging through Turbulence

    CERN Document Server

    Dixon, P Ben; Chan, Kam Wai Clifford; O'Sullivan-Hale, Colin; Rodenburg, Brandon; Hardy, Nicholas D; Shapiro, Jeffrey H; Simon, D S; Sergienko, A V; Boyd, R W; Howell, John C

    2011-01-01

    We investigate the effect of turbulence on quantum ghost imaging. We use entangled photons and demonstrate that for a novel experimental configuration the effect of turbulence can be greatly diminished. By decoupling the entangled photon source from the ghost imaging central image plane, we are able to dramatically increase the ghost image quality. When imaging a test pattern through turbulence, this method increased the imaged pattern visibility from V = 0.14 +/- 0.04 to V = 0.29 +/- 0.04.

  14. "Ghost river": The Columbia

    OpenAIRE

    Gayton, D.

    2001-01-01

    Metadata only record This perspective piece examines the history and geography of the Columbia River and some current ecosystem management issues related to hydroelectric development on the river. Once the greatest salmon producer in the word, the Columbia has, according to the author, become a "ghost river," with its salmon runs reduced to remnants, and its ecological integrity hanging in the balance. The author suggests that British Columbians have much to lose, both biologically and cul...

  15. Local particle-ghost symmetry

    CERN Document Server

    Kawamura, Yoshiharu

    2015-01-01

    We study the quantization of systems with local particle-ghost symmetries. The systems contain ordinary particles including gauge bosons and their counterparts obeying different statistics. The particle-ghost symmetry is a kind of fermionic symmetry, different from the space-time supersymmetry and the BRST symmetry. Subsidiary conditions on states guarantee the unitarity of systems.

  16. Media in the dump

    OpenAIRE

    Gabrys, Jennifer

    2006-01-01

    'Media in the Dump' examines the phenomenon of electronic waste through five locations, from sites of manufacture (Silicon Valley) to disposal (China). This essay is original in its interdisciplinary approach to the topic of electronic waste. It synthesises fieldwork and scholarship from technology to design and cultural studies. The structure for this essay is original in its surveying of five 'waste ecologies' that traverse the globe.

  17. Extended recombinant bacterial ghost system.

    Science.gov (United States)

    Lubitz, W; Witte, A; Eko, F O; Kamal, M; Jechlinger, W; Brand, E; Marchart, J; Haidinger, W; Huter, V; Felnerova, D; Stralis-Alves, N; Lechleitner, S; Melzer, H; Szostak, M P; Resch, S; Mader, H; Kuen, B; Mayr, B; Mayrhofer, P; Geretschläger, R; Haslberger, A; Hensel, A

    1999-08-20

    Controlled expression of cloned PhiX174 gene E in Gram-negative bacteria results in lysis of the bacteria by formation of an E-specific transmembrane tunnel structure built through the cell envelope complex. Bacterial ghosts from a variety of bacteria are used as non-living candidate vaccines. In the recombinant ghost system, foreign proteins are attached on the inside of the inner membrane as fusions with specific anchor sequences. Ghosts have a sealed periplasmic space and the export of proteins into this space vastly extends the capacity of ghosts or recombinant ghosts to function as carriers of foreign antigens. In addition, S-layer proteins forming shell-like self assembly structures can be expressed in candidate vaccine strains prior to E-mediated lysis. Such recombinant S-layer proteins carrying foreign epitopes further extend the possibilities of ghosts as carriers of foreign epitopes. As ghosts have inherent adjuvant properties, they can be used as adjuvants in combination with subunit vaccines. Subunits or other ligands can also be coupled to matrixes like dextran which are used to fill the internal lumen of ghosts. Oral, aerogenic or parenteral immunization of experimental animals with recombinant ghosts induced specific humoral and cellular immune responses against bacterial and target components including protective mucosal immunity. The most relevant advantage of recombinant bacterial ghosts as immunogens is that no inactivation procedures that denature relevant immunogenic determinants are employed in this production. This fact explains the superior quality of ghosts when compared to other inactivated vaccines. The endotoxic component of the outer membrane does not limit the use of ghosts as vaccine candidates but triggers the release of several potent immunoregulatory cytokines. As carriers, there is no limitation in the size of foreign antigens that can be inserted in the membrane and the capacity of all spaces including the membranes, peri

  18. Causes for "ghost" manifolds

    Science.gov (United States)

    Borok, S.; Goldfarb, I.; Gol'dshtein, V.

    2009-05-01

    The paper concerns intrinsic low-dimensional manifold (ILDM) method suggested in [Maas U, Pope SB. Simplifying chemical kinetics: intrinsic low-dimensional manifolds in composition space, combustion and flame 1992;88:239-64] for dimension reduction of models describing kinetic processes. It has been shown in a number of publications [Goldfarb I, Gol'dshtein V, Maas U. Comparative analysis of two asymptotic approaches based on integral manifolds. IMA J Appl Math 2004;69:353-74; Kaper HG, Kaper TJ, Asymptotic analysis of two reduction methods for systems of chemical reactions. Phys D 2002;165(1-2):66-93; Rhodes C, Morari M, Wiggins S. Identification of the low order manifolds: validating the algorithm of Maas and Pope. Chaos 1999;9(1):108-23] that the ILDM-method works successfully and the intrinsic low-dimensional manifolds belong to a small vicinity of invariant slow manifolds. The ILDM-method has a number of disadvantages. One of them is appearance of so-called "ghost"-manifolds, which do not have connection to the system dynamics [Borok S, Goldfarb I, Gol'dshtein V. "Ghost" ILDM - manifolds and their discrimination. In: Twentieth Annual Symposium of the Israel Section of the Combustion Institute, Beer-Sheva, Israel; 2004. p. 55-7; Borok S, Goldfarb I, Gol'dshtein V. About non-coincidence of invariant manifolds and intrinsic low-dimensional manifolds (ILDM). CNSNS 2008;71:1029-38; Borok S, Goldfarb I, Gol'dshtein V, Maas U. In: Gorban AN, Kazantzis N, Kevrekidis YG, Ottinger HC, Theodoropoulos C, editors. "Ghost" ILDM-manifolds and their identification: model reduction and coarse-graining approaches for multiscale phenomena. Berlin-Heidelberg-New York: Springer; 2006. p. 55-80; Borok S, Goldfarb I, Gol'dshtein V. On a modified version of ILDM method and its asymptotic analysis. IJPAM 2008; 44(1): 125-50; Bykov V, Goldfarb I, Gol'dshtein V, Maas U. On a modified version of ILDM approach: asymptotic analysis based on integral manifolds. IMA J Appl Math 2006

  19. Ghost-Story Telling: Keeping It Appropriate.

    Science.gov (United States)

    Weintraub, Jeff

    1996-01-01

    Guidelines for telling ghost stories at camp involve considering children's fears at different ages, telling age appropriate stories, determining appropriate times for telling ghost stories, and minimizing fear when a child becomes frightened by a ghost story. Includes tips on the selection, preparation, and presentation of ghost stories. (LP)

  20. Premature beam dumps in 2011

    CERN Document Server

    Albert, Markus

    2012-01-01

    The statistical analysis of all non-programmed beam dumps during the 2011 proton run is presented. The selection criteria of fills that got considered were that the beam intensity of each of the two beams exceeded at least 1e12 particles per beam in order to exclude all probe beam dumps and most of the MPS test dumps. A distribution of beam dump causes by system is shown, as well as the time it took to re-establish injection after a non-programmed dump for fills which made it into STABLE BEAMS. This was done in an attempt to evaluate the cost of those non-programmed dumps in terms of time.

  1. The International Linear Collider beam dumps

    OpenAIRE

    Appleby, R.; Keller, L; Markiewicz, T.; Seryi, A.; Sugahara, R.; Walz, D.

    2006-01-01

    The ILC beam dumps are a key part of the accelerator design. At Snowmass 2005, the current status of the beam dump designs were reviewed, and the options for the overall dump layout considered. This paper describes the available dump options for the baseline and the alternatives and considers issues for the dumps that require resolution.

  2. When is Multimetric Gravity Ghost-free?

    CERN Document Server

    Nomura, Kouichi

    2012-01-01

    We study ghosts in multimetric gravity by combining the mini-superspace and the Hamiltonian constraint analysis. We first revisit bimetric gravity and explain why it is ghost-free. Then, we apply our method to trimetric gravity and clarify when the model contains a ghost. More precisely, we prove trimetric gravity generically contains a ghost. However, if we cut the interaction of a pair of metrics, trimetric gravity becomes ghost-free. We further extend the Hamiltonian analysis to general multimetric gravity and calculate the number of ghosts in various models. Thus, we find multimetric gravity with loop type interactions never becomes ghost-free.

  3. Living with Ghosts

    CERN Document Server

    Hawking, Stephen William; Hertog, Thomas

    2002-01-01

    Perturbation theory for gravity in dimensions greater than two requires higher derivatives in the free action. Higher derivatives seem to lead to ghosts, states with negative norm. We consider a fourth order scalar field theory and show that the problem with ghosts arises because in the canonical treatment, $\\phi$ and $\\Box \\phi $ are regarded as two independent variables. Instead, we base quantum theory on a path integral, evaluated in Euclidean space and then Wick rotated to Lorentzian space. The path integral requires that quantum states be specified by the values of $\\phi$ and $\\phi_{,\\tau}$. To calculate probabilities for observations, one has to trace out over $\\phi_{,\\tau}$ on the final surface. Hence one loses unitarity, but one can never produce a negative norm state or get a negative probability. It is shown that transition probabilities tend toward those of the second order theory, as the coefficient of the fourth order term in the action tends to zero. Hence unitarity is restored at the low energi...

  4. RIA Fragmentation Line Beam Dumps

    Energy Technology Data Exchange (ETDEWEB)

    Stein, W

    2003-08-08

    The Rare Isotope Accelerator project involves generating heavy-element ion beams for use in a fragmentation target line to produce beams for physics research. The main beam, after passing through the fragmentation target, may be dumped into a beam dump located in the vacuum cavity of the first dipole magnet. For a dump beam power of 100 kW, cooling is required to avoid excessive high temperatures. The proposed dump design involves rotating cylinders to spread out the energy deposition and turbulent subcooled water flow through internal water cooling passages to obtain high, nonboiling, cooling rates.

  5. Cosmology with a light ghost

    Science.gov (United States)

    Ivanov, Mikhail M.; Tokareva, Anna A.

    2016-12-01

    We study the creation and evolution of cosmological perturbations in renormalizable quadratic gravity with a Weyl term. We adopt a prescription that implies the stability of the vacuum at the price of introducing a massive spin-two ghost state, leading to the loss of unitarity. The theory may still be predictive regardless the interpretation of non-unitary processes provided that their rate is negligible compared to the Universe expansion rate. This implies that the ghost is effectively stable. In such a setup, there are two scalar degrees of freedom excited during inflation. The first one is the usual curvature perturbation whose power spectrum appears to coincide with that of single-field inflation. The second one is a scalar component of the ghost encoded in the shift vector of the metric in the uniform inflaton gauge. The amplitudes of primordial tensor and vector perturbations are strongly suppressed. After inflation the ghost field starts to oscillate and its energy density shortly becomes dominant in the Universe. For all ghost masses allowed by laboratory constraints ghosts should have ``overclosed'' the Universe at temperatures higher than that of primordial nucleosynthesis. Thus, the model with the light Weyl ghost is ruled out.

  6. Inflation with light Weyl ghost

    Directory of Open Access Journals (Sweden)

    Tokareva Anna

    2016-01-01

    Full Text Available Inflationary perturbations are considered in a renormalizable but non-unitary theory of gravity with the additional Weyl term. We obtained that ghost degrees of freedom do not spoil the inflation and the scalar perturbation amplitude at the linear level even in a case of the ghost with mass smaller than Hubble parameter at inflation. The ghost impact to the observables is also estimated to be negligible for the range of masses allowed by the experiment. The non-linear level of the theory and its possible application are also discussed.

  7. Quantum Gravity Without Ghosts

    CERN Document Server

    DeWitt, Bryce Seligman; Witt, Bryce De; Molina-Paris, Carmen

    1998-01-01

    An outline is given of a recently discovered technique for building a quantum effective action that is completely independent of gauge-fixing choices and ghost determinants. One makes maximum use of the geometry and fibre-bundle structure of the space of field histories and introduces a set of nonlocal composite fields: the geodesic normal fields based on Vilkovisky's connection on the space of histories. The closed-time-path formalism of Schwinger, Bakshi, Mahantappa {\\it et al} can be adapted for these fields, and a set of gauge-fixing-independent dynamical equations for their expectation values (starting from given initial conditions) can be computed. An obvious application for such equations is to the study of the formation and radiative decay of black holes, and to other back-reaction problems.

  8. Dumping in a Global World

    NARCIS (Netherlands)

    J.L. Moraga-Gonzalez (José Luis); J.M.A. Viaene (Jean-Marie)

    2004-01-01

    textabstractAnti-dumping actions are now the trade policy of choice of developing and transition economies. To understand why these economies have increasingly applied anti-dumping laws, we build a simple theoretical model of vertical intra-industry trade and investigate the strategic incentives of

  9. Computational Ghost Imaging for Remote Sensing

    Science.gov (United States)

    Erkmen, Baris I.

    2012-01-01

    This work relates to the generic problem of remote active imaging; that is, a source illuminates a target of interest and a receiver collects the scattered light off the target to obtain an image. Conventional imaging systems consist of an imaging lens and a high-resolution detector array [e.g., a CCD (charge coupled device) array] to register the image. However, conventional imaging systems for remote sensing require high-quality optics and need to support large detector arrays and associated electronics. This results in suboptimal size, weight, and power consumption. Computational ghost imaging (CGI) is a computational alternative to this traditional imaging concept that has a very simple receiver structure. In CGI, the transmitter illuminates the target with a modulated light source. A single-pixel (bucket) detector collects the scattered light. Then, via computation (i.e., postprocessing), the receiver can reconstruct the image using the knowledge of the modulation that was projected onto the target by the transmitter. This way, one can construct a very simple receiver that, in principle, requires no lens to image a target. Ghost imaging is a transverse imaging modality that has been receiving much attention owing to a rich interconnection of novel physical characteristics and novel signal processing algorithms suitable for active computational imaging. The original ghost imaging experiments consisted of two correlated optical beams traversing distinct paths and impinging on two spatially-separated photodetectors: one beam interacts with the target and then illuminates on a single-pixel (bucket) detector that provides no spatial resolution, whereas the other beam traverses an independent path and impinges on a high-resolution camera without any interaction with the target. The term ghost imaging was coined soon after the initial experiments were reported, to emphasize the fact that by cross-correlating two photocurrents, one generates an image of the target. In

  10. Studying fermionic ghost imaging with independent photons

    Science.gov (United States)

    Liu, Jianbin; Zhou, Yu; Zheng, Huaibin; Chen, Hui; Li, Fu-li; Xu, Zhuo

    2016-12-01

    Ghost imaging with thermal fermions is calculated based on two-particle interference in Feynman's path integral theory. It is found that ghost imaging with thermal fermions can be simulated by ghost imaging with thermal bosons and classical particles. Photons in pseudothermal light are employed to experimentally study fermionic ghost imaging. Ghost imaging with thermal bosons and fermions is discussed based on the point-to-point (spot) correlation between the object and image planes. The employed method offers an efficient guidance for future ghost imaging with real thermal fermions, which may also be generalized to study other second-order interference phenomena with fermions.

  11. Teen Girls' Resistance and the Disappearing Social in "Ghost World."

    Science.gov (United States)

    Giroux, Henry A.

    2002-01-01

    Examines "Ghost World," a Hollywood film about youth, friendship, alienation, and survival, critically investigating how popular representations of youth signal a particular crisis of the social through a discourse of privatization, which fails to locate youth and problems they face within the related geographies of the social and political. The…

  12. Ghost Head Nebula

    Science.gov (United States)

    1999-01-01

    Looking like a colorful holiday card, a new image from NASA's Hubble Space Telescope reveals a vibrant green and red nebula far from Earth. The image of NGC 2080, taken by Hubble's Wide Field and Planetary Camera 2, designed and built by NASA's Jet Propulsion Laboratory, Pasadena, Calif., is available online at http://www.jpl.nasa.gov/images/wfpc . Images like this help astronomers investigate star formation in nebulas. NGC 2080, nicknamed 'The Ghost Head Nebula,' is one of a chain of star-forming regions lying south of the 30 Doradus nebula in the Large Magellanic Cloud. 30 Doradus is the largest star-forming complex in the local group of galaxies. This 'enhanced color' picture is composed of three narrow-band-filter images obtained by Hubble on March 28, 2000. The red and blue light come from regions of hydrogen gas heated by nearby stars. The green light on the left comes from glowing oxygen. The energy to illuminate the green light is supplied by a powerful stellar wind, a stream of high-speed particles coming from a massive star just outside the image. The central white region is a combination of all three emissions and indicates a core of hot, massive stars in this star-formation region. Intense emission from these stars has carved a bowl-shaped cavity in surrounding gas. In the white region, the two bright areas (the 'eyes of the ghost') - named A1 (left) and A2 (right) -- are very hot, glowing 'blobs' of hydrogen and oxygen. The bubble in A1 is produced by the hot, intense radiation and powerful stellar wind from one massive star. A2 contains more dust and several hidden, massive stars. The massive stars in A1 and A2 must have formed within the last 10,000 years, since their natal gas shrouds are not yet disrupted by the powerful radiation of the newborn stars. The Space Telescope Science Institute is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract with the Goddard Space Flight Center, Greenbelt, Md. The

  13. 30 CFR 77.1608 - Dumping facilities.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Dumping facilities. 77.1608 Section 77.1608... Haulage § 77.1608 Dumping facilities. (a) Dumping locations and haulage roads shall be kept reasonably free of water, debris, and spillage. (b) Where the ground at a dumping place may fail to support...

  14. Using Ghost Reflections Rather than Removing Them

    NARCIS (Netherlands)

    Blacquiere, G.; Berkhout, A.J.

    2015-01-01

    In marine acquisition both a direct wavefield and a ghost wavefield are produced as well as recorded. Hence, the seismic data can be considered to be a natural blend of four wavefields related to the real sources, ghost sources, real detectors and ghost detectors respectively. We consider deghosting

  15. Confessions of Academic Ghost Authors

    Directory of Open Access Journals (Sweden)

    Ehsan Shahghasemi

    2015-02-01

    Full Text Available Academic plagiarism exists in all academic spheres, but contextual factors determine the level, intensity, and forms of it. Over the last few years, the phenomenon of “Ghost Authorship” has become widespread in Iran, and concerns have been expressed regarding this issue, not only by academicians but also by officials. In this study, 143 students participated in a two-step interview study in which they spoke about their experiences on either seeing a ghost author doing the research of someone else in exchange of money or they themselves being a ghost author. In all, 29 students said that they had done it once or so. The in-depth interviews with these 29 students showed how the plagiarism industry works in Iran, who the customers are, how they find each other, and so on.

  16. Polarimetry by classical ghost diffraction

    CERN Document Server

    Kellock, Henri; Friberg, Ari T; Shirai, Tomohiro

    2014-01-01

    We present a technique for studying the polarimetric properties of a birefringent object by means of classical ghost diffraction. The standard ghost diffraction setup is modified to include polarizers for controlling the state of polarization of the beam in various places. The object is characterized by a Jones matrix and the absolute values of the Fourier transforms of its individual elements are measured. From these measurements the original complex-valued functions can be retrieved through iterative methods resulting in the full Jones matrix of the object. We present two different placements of the polarizers and show that one of them leads to better polarimetric quality, while the other placement offers the possibility to perform polarimetry without controlling the source's state of polarization. The concept of an effective source is introduced to simplify the calculations. Ghost polarimetry enables the assessment of polarization properties as a function of position within the object through simple intens...

  17. Unexorcized ghost in DGP brane world

    CERN Document Server

    Izumi, K; Tanaka, T; Izumi, Keisuke; Koyama, Kazuya; Tanaka, Takahiro

    2007-01-01

    The braneworld model of Dvali-Gabadadze-Porrati realizes the self-accelerating universe. However, it is known that this cosmological solution contains a spin-2 ghost. We study the possibility of avoiding the appearance of the ghost by slightly modifying the model, introducing the second brane. First we consider a simple model without stabilization of the separation of the brane. By changing the separation between the branes, we find we can erase the spin-2 ghost. However, this can be done only at the expense of the appearance of a spin-0 ghost instead. We discuss why these two different types of ghosts are correlated. Then, we examine a model with stabilization of the brane separation. Even in this case, we find that the correlation between spin-0 and spin-2 ghosts remains. As a result we find we cannot avoid the appearance of ghost by two-branes model.

  18. Ghost Imaging with Matter Waves

    Science.gov (United States)

    Khakimov, Roman; Henson, Bryce; Shin, David; Hodgman, Sean; Dall, Robert; Baldwin, Kenneth; Truscott, Andrew

    2016-05-01

    We demonstrate, for the first time, high resolution ghost imaging of a macroscopic object using atoms. Ghost imaging is a novel technique in which the image emerges from cross-correlation of particles (usually photons)in two separate beams. One beam is detected with a single-pixel (bucket detector) after passing through the object, while the other beam does not interact with the object and is registered with high spatial resolution. Neither detector can reconstruct the image independently. In our experiment, the two beams are formed by correlated pairs of ultracold metastable helium atoms originating from thecollision of two Bose-Einstein Condensates. After s-wave scattering the atoms form a spherical shell of strongly correlated pairs with opposite momenta. We extend this technique with more than a10-foldincrease in the number of correlated pairs available for eachsingle experiment run, by using higher-order Bragg scattering in the Kapitza-Dirac regime, with multiple shells generated from different diffraction orders. Using single-atom detection, we create ghost images of a target maskwith a resolution given by the width of the cross-corrrelation function of atomic momenta. Future extensions could include ghost interference and EPR tests.

  19. Cosmology with a light ghost

    CERN Document Server

    Ivanov, Mikhail M

    2016-01-01

    We study the creation and evolution of cosmological perturbations in renormalizable quadratic gravity with a Weyl term. We adopt a prescription that implies the stability of the vacuum at the price of introducing a massive spin-two ghost state, leading to the loss of unitarity. The theory may still be predictive regardless the interpretation of non-unitary processes provided that their rate is negligible compared to the Universe expansion rate. This implies that the ghost is effectively stable. In such a setup, there are two scalar degrees of freedom excited during inflation. The first one is the usual curvature perturbation whose power spectrum appears to coincide with that of single-filed inflation. The second one is a scalar component of the ghost encoded in the shift vector of the metric in the uniform inflaton gauge. The amplitudes of primordial tensor and vector perturbations are strongly suppressed. After inflation the ghost field starts to oscillate and its energy density shortly becomes dominant in t...

  20. EU Lobbying and Anti-Dumping Policy

    DEFF Research Database (Denmark)

    Nielsen, Jørgen Ulff-Møller; Svendsen, Gert Tinggaard

    2012-01-01

    of petitioning firms and Council voting in the case of anti-dumping policy. If the political position of countries in anti-dumping cases is influenced by domestic lobbying efforts, we expect that the empirical pattern of country distribution of petitioning firms in EU anti-dumping cases corresponds closely...... to the empirical pattern of EU country distribution in Council voting. Our results show a low petitioning intensity for anti-dumping investigations and a high voting intensity against anti-dumping measures in Northern Europe. Thus, it seems likely that domestic lobbying efforts have influenced the political...... position of countries in the special case of EU anti-dumping policy....

  1. The Ghosts of the School Curriculum: Past, Present and Future

    Science.gov (United States)

    Kenway, Jane

    2008-01-01

    Ghosts haunt the school curriculum. Charles Dickens' "A Christmas Carol" provides a starting point for thinking about these curriculum ghosts. In the Preface, he states that he has "endeavoured in this Ghostly little book, to raise the Ghost of an Idea". In this article, the author seeks to raise the ghost of an idea, and to…

  2. Generation of safety enhanced Edwardsiella tarda ghost vaccine.

    Science.gov (United States)

    Lee, Dong Jin; Kwon, Se Ryun; Zenke, Kosuke; Lee, Eun Hye; Nam, Yoon Kwon; Kim, Sung Koo; Kim, Ki Hong

    2008-09-24

    A dual vector expressing the ghost-inducing PhiX174 lysis E gene and the bacterial DNA degrading staphylococcal nuclease A (SNA) gene was constructed to solve the problem of remnant antibiotic resistance genes and genomic DNA with intact pathogenic islands in the final product of Edwardsiella tarda ghosts (ETG). The SNA (devoid of secretion signal sequence and the nuclease B amino terminus sequence), fused with the 26 amino acid N-terminal sequence of the lambda phage Cro gene, showed successful degradation of bacterial nucleic acids. Furthermore, the nuclease activity of SNA in E. tarda was enhanced by codon optimization of the SNA gene using site-directed mutagenesis. ETG were generated via coexpression of the SNA gene and lysis gene E under the control of each lambdaP(R) promoter. The ghost bacteria generation system we describe is advantageous as it allows the use of a single plasmid, improves safety and vaccine purity by limiting residual genetic content from the ghost bacteria, and reduces production costs through cheap means of induction that use only temperature shifts.

  3. A Large Scintillating Screen for the LHC Dump Line

    CERN Document Server

    Lefèvre, T; Bravin, E; Burger, S; Goddard, B; Hutchins, S; Renaglia, T

    2008-01-01

    The 7 TeV proton beam from the LHC ring is ejected through a long transfer line to beam dump blocks, approximately 100m downstream of the ejection septa, a series of dilution kicker magnets provide a sweeping deflection spreading the extracted beam over a 40 cm diameter area on the face of the beam dump cores. During normal operation, the quality of each dump event must be recorded and verified. The so-called â€ワPost-Mortem” dataset will include information from the beam dumping system (logic signals, kicker pulses…) as well as from the beam diagnostics along the extraction lines. For this purpose, profile monitors in front of the dump blocks must be permanently available during machine operation. With more than 1014 protons stored in LHC, the energy deposited in the screen becomes an issue and thermalresistant materials have to be considered. In this paper, the design of this quite unusual device is presented. The different technical options considered for the choice of the screen material are ...

  4. LHC injection and dump protection

    CERN Document Server

    Bartmann, W; Bracco, C; Goddard, B; Kain, V; Rossi, A; Wollmann, D

    2010-01-01

    The machine protection against fast failures including injection or dump kickers relies on fixed and movable devices. Results will be shown from the low-intensity beam commissioning of the moveable injection protection devices in the SPS to LHC transfer lines and downstream of the LHC injection kickers, and of the LHC dump protection elements in IR6. This paper is almost exclusively focussing on the issues arising during the 2009 commissioning. The implications of these results and a commissioning status report with the planning for 2010 will be addressed.

  5. Dumping in Developing and Transition Economies

    NARCIS (Netherlands)

    J.L. Moraga-Gonzalez (José Luis); J.M.A. Viaene (Jean-Marie)

    2004-01-01

    textabstractWe build a simple theoretical model to understand why developing and transition economies have increasingly applied anti-dumping laws. To that end, we investigate the strategic incentives of oligopolistic exporting firms to undertake dumping in these economies. We show that dumping may b

  6. Topological mixing with ghost rods

    Science.gov (United States)

    Gouillart, Emmanuelle; Thiffeault, Jean-Luc; Finn, Matthew D.

    2006-03-01

    Topological chaos relies on the periodic motion of obstacles in a two-dimensional flow in order to form nontrivial braids. This motion generates exponential stretching of material lines, and hence efficient mixing. Boyland, Aref, and Stremler [J. Fluid Mech. 403, 277 (2000)] have studied a specific periodic motion of rods that exhibits topological chaos in a viscous fluid. We show that it is possible to extend their work to cases where the motion of the stirring rods is topologically trivial by considering the dynamics of special periodic points that we call “ghost rods”, because they play a similar role to stirring rods. The ghost rods framework provides a new technique for quantifying chaos and gives insight into the mechanisms that produce chaos and mixing. Numerical simulations for Stokes flow support our results.

  7. Peripheral dentinogenic ghost cell tumor

    Directory of Open Access Journals (Sweden)

    Sushant S Kamat

    2013-01-01

    Full Text Available Dentinogenic ghost cell tumors (DGCT are uncommon lesions mainly with rare peripheral types. This report presents a case of peripheral DGCT on the left side of the mandibular alveolar ridge of a heavy smoker, a 68-year-old man, with main presenting feature as a mild pain. Submandibular lymphadenopathy and radiological "saucerization" were evident. Differential diagnosis included fibroma, neurofibroma, peripheral ameloblastoma, peripheral odontogenic fibroma, and peripheral giant cell granuloma. Histologically, ameloblastoma-like epithelial elements were seen in association with grouped ghost cells. Proliferating polyhedral cells and stellate reticulum-like cells with various densities were spread over a wide range of the field. The lesion was curetted and after 2 years of follow up, it did not recur.

  8. Ghost imaging with broad distance

    Institute of Scientific and Technical Information of China (English)

    段德洋; 张路; 杜少将; 夏云杰

    2015-01-01

    We present a scheme that is able to achieve the ghost imaging with broad distance. The physical nature of our scheme is that the different wavelength beams are separated in free space by an optical media according to the slow light or dispersion principle. Meanwhile, the equality of the optical distance of the two light arms is not violated. The photon correlation is achieved by the rotating ground glass plate (RGGP) and spatial light modulator (SLM), respectively. Our work shows that a monochromic ghost image can be obtained in the case of RGGP. More importantly, the position (or distance) of the object can be ascertained by the color of the image. Thus, the imaging and ranging processes are combined as one process for the first time to the best of our knowledge. In the case of SLM, we can obtain a colored image regardless of where the object is.

  9. Chemical munitions dumped at sea

    Science.gov (United States)

    Edwards, Margo; Bełdowski, Jacek

    2016-06-01

    Modern chemical warfare is a byproduct of the industrial revolution, which created factories capable of rapidly producing artillery shells that could be filled with toxic chemicals such as chlorine, phosgene and mustard agent. The trench warfare of World War I inaugurated extensive deployments of modern chemical weapons in 1915. Concomitantly, the need arose to dispose of damaged, captured or excess chemical munitions and their constituents. Whereas today chemical warfare agents (CWA) are destroyed via chemical neutralization processes or high-temperature incineration in tandem with environmental monitoring, in the early to middle 20th century the options for CWA disposal were limited to open-air burning, burial and disposal at sea. The latter option was identified as the least likely of the three to impact mankind, and sea dumping of chemical munitions commenced. Eventually, the potential impacts of sea dumping human waste were recognized, and in 1972 an international treaty, the Convention on the Prevention of Marine Pollution by Dumping of Wastes and Other Matter, was developed to protect the marine environment from pollution caused by the dumping of wastes and other matter into the ocean. By the time this treaty, referred to as the London Convention, was signed by a majority of nations, millions of tons of munitions were known to have been disposed throughout the world's oceans.

  10. High energy laser beam dump

    Science.gov (United States)

    Halpin, John

    2004-09-14

    The laser beam dump is positioned in a housing. An absorbing glass plate means is operatively connected to the housing. A heat sync means for extracting heat from the absorbing glass plate means is operatively connected to the housing and operatively connected to the absorbing glass plate means.

  11. On Ghost Images in Shakesperare's Dramas

    Institute of Scientific and Technical Information of China (English)

    陈立明

    2009-01-01

    The description of ghosts is a creative characteristic in Shakespeare's drama writing.The images of ghosts are key roles and,to a great extent,critical elements to develop the whole plot of Shakespeare's plays,Hamlet,The life and Death of King Richard Ⅲ and The tragedy of Macbeth.Analyzing Shakespeare's description of ghosts is a good access for us to decode the connotation of his dramas.

  12. On the algebra of ghost fields

    CERN Document Server

    Krahe, F

    1995-01-01

    We study in detail the algebra of free ghost fields which we realize in a Hilbert-Fock space with positive metric. The investigation of causality clarifies the exact reason for the failure of the spin-statistics theorem and leads to the introduction of the Krein Operator. We study the charge algebra of the ghost fields which gives a representation of {\\rm gl}(2,{\\cal C}). The symmetries of the S-matrix in ghost space are pointed out.

  13. Cascading Gravity is Ghost Free

    CERN Document Server

    de Rham, Claudia; Tolley, Andrew J

    2010-01-01

    We perform a full perturbative stability analysis of the 6D cascading gravity model in the presence of 3-brane tension. We demonstrate that for sufficiently large tension on the (flat) 3-brane, there are no ghosts at the perturbative level, consistent with results that had previously only been obtained in a specific 5D decoupling limit. These results establish the cascading gravity framework as a consistent infrared modification of gravity.

  14. Ghost Images in Schmidt CCD Photometry

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The wide field of the Schmidt telescope implies a greater chance of the field containing bright objects, and the presence of a corrector lens produces a certain type of ghost images. We summarize and confirm the features of such ghost images in Schmidt CCD photometry. The ghost images could be star-like under special observational conditions. The zenith distance of the telescope, among other factors, is found to correlate with different patterns of the ghost images. Some relevant issues are discussed and possible applications of our results are suggested.

  15. Low energy ghosts and the Jeans' instability

    Science.gov (United States)

    Gümrükçüoǧlu, A. Emir; Mukohyama, Shinji; Sotiriou, Thomas P.

    2016-09-01

    We show that a massless canonical scalar field minimally coupled to general relativity can become a tachyonic ghost at low energies around a background in which the scalar's gradient is spacelike. By performing a canonical transformation we demonstrate that this low energy ghost can be recast, at the level of the action, in a form of a fluid that undergoes a Jeans-like instability affecting only modes with large wavelength. This illustrates that low energy tachyonic ghosts do not lead to a catastrophic quantum vacuum instability, unlike the usual high-energy ghost degrees of freedom.

  16. Influences on the occurrence of dumping syndrome.

    Science.gov (United States)

    Kaushik, S P; Ralphs, D N; Hobsley, M

    1983-03-01

    A dumping provocation test using 50% of glucose solution labeled with Indium 115 m, was performed on 146 occasions pre- and postoperatively in 85 patients. Dumping elicited by the test was defined by the symptoms produced by the test and various objective measures of dumping. The influence of various factors other than the type of operation on the occurrence of dumping has been studied in detail. The incidence of dumping symptoms induced by the test has shown no significant correlation with age, sex, weight, height, smoking habits, race, dose of hypertonic glucose, and the time elapsed since surgery. However, a significant relationship has been observed between the duration of ulcer symptoms before operation and the occurrence of dumping symptoms induced by the test. The test not only reproduced the symptoms patients had reported after eating ordinary foods, it also helped in eliminating patients with borderline symptoms as our objective measures collectively differentiated three patients from those with the dumping syndrome.

  17. The effect of residual Nyquist ghost in quantitative echo-planar diffusion imaging.

    Science.gov (United States)

    Porter, D A; Calamante, F; Gadian, D G; Connelly, A

    1999-08-01

    Single-shot diffusion-weighted echo-planar imaging (EPI) is typically used for most clinical diffusion studies due to its low sensitivity to patient motion. Although the Nyquist ghost artifact in EPI can be substantially reduced, there is frequently a residual ghost with low signal intensity. As reported in this study, this residual ghost can produce severe artifacts when maps of the apparent diffusion coefficient (ADC) are calculated from single-shot echo-planar images. The artifacts presented in this paper appear as regions of apparently low ADC which simulate regions of reduced diffusion, but are in fact generated by b-value dependent Nyquist ghosts of the orbits. Data acquired in vivo were used to demonstrate that these artifacts can be avoided by including standard methods of spatial presaturation or fluid-suppression in the diffusion-weighted EPI protocol. In addition, phantom studies were used to illustrate how phase and amplitude variations in the ghost generate the artifacts and theoretical expressions, derived elsewhere, were used to provide a detailed understanding of the artifacts observed in vivo. The level of Nyquist ghost reported for the current generation of commercial scanners suggests that this is a general phenomenon which should be a consideration in all EPI-based diffusion studies. Magn Reson Med 42:385-392, 1999.

  18. Fourth Order Theories Without Ghosts

    CERN Document Server

    Mannheim, P D; Mannheim, Philip D.; Davidson, Aharon

    2000-01-01

    Using the Dirac constraint method we show that the pure fourth-order Pais-Uhlenbeck oscillator model is free of observable negative norm states. Even though such ghosts do appear when the fourth order theory is coupled to a second order one, the limit in which the second order action is switched off is found to be a highly singular one in which these states move off shell. Given this result, construction of a fully unitary, renormalizable, gravitational theory based on a purely fourth order action in 4 dimensions now appears feasible.

  19. 7 CFR 48.7 - Evidence to justify dumping.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Evidence to justify dumping. 48.7 Section 48.7... Dumping § 48.7 Evidence to justify dumping. Any person, receiving produce in interstate commerce or in the..., prior to such destroying, abandoning, discarding or dumping, obtain a dumping certificate or...

  20. 49 CFR 176.97 - Prohibition of dump scows.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Prohibition of dump scows. 176.97 Section 176.97... Requirements for Barges § 176.97 Prohibition of dump scows. Dump scows are barges having cargo carrying compartments of the hopper type and fitted with a bottom dump or a side dump. This type of barge is...

  1. Temporal ghost imaging with pseudo-thermal speckle light

    Science.gov (United States)

    Devaux, Fabrice; Phan Huy, Kien; Denis, Séverine; Lantz, Eric; Moreau, Paul-Antoine

    2017-02-01

    We report ghost imaging of a single non-reproducible temporal signal with kHz resolution by using pseudo-thermal speckle light patterns and a single detector array with a million of pixels working without any temporal resolution. A set of speckle patterns is generated deterministically at a sampling rate of tens kHz, multiplied by the temporal signal and time integrated in a single shot by the camera. The temporal information is retrieved by computing the spatial intensity correlations between this time integrated image and each speckle pattern of the set.

  2. Temporal ghost imaging with pseudo-thermal speckle light

    CERN Document Server

    Devaux, Fabrice; Moreau, Paul-Antoine; Denis, Severine; Lantz, Eric

    2016-01-01

    We report ghost imaging of a single non-reproducible temporal signal in the range of tens kHz by using pseudo-thermal speckle light patterns and a single detector array with a million of pixels working without any temporal resolution. A set of speckle patterns is generated deterministically at radio-frequency rate, multiplied by the temporal signal and time integrated in a single shot by the camera. The temporal information is retrieved by computing the spatial intensity correlations between this time integrated image and each speckle pattern of the set.

  3. 40 CFR 227.14 - Criteria for evaluating the need for ocean dumping and alternatives to ocean dumping.

    Science.gov (United States)

    2010-07-01

    ... ocean dumping and alternatives to ocean dumping. 227.14 Section 227.14 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) OCEAN DUMPING CRITERIA FOR THE EVALUATION OF PERMIT APPLICATIONS FOR OCEAN DUMPING OF MATERIALS Need for Ocean Dumping § 227.14 Criteria for evaluating the need for...

  4. Ghost imaging lidar via sparsity constraints

    CERN Document Server

    Zhao, Chengqiang; Chen, Mingliang; Li, Enrong; Wang, Hui; Xu, Wendong; Han, Shensheng

    2012-01-01

    For remote sensing, high-resolution imaging techniques are helpful to catch more characteristic information of the target. We extend pseudo-thermal light ghost imaging to the area of remote imaging and propose a ghost imaging lidar system. For the first time, we demonstrate experimentally that the real-space image of a target at about 1.0 km range with 20 mm resolution is achieved by ghost imaging via sparsity constraints (GISC) technique. The characters of GISC technique compared to the existing lidar systems are also discussed.

  5. Ghost inflation and de Sitter entropy

    CERN Document Server

    Jazayeri, Sadra; Saitou, Rio; Watanabe, Yota

    2016-01-01

    It has been known that the generalized second law of black hole thermodynamics is difficult, if not impossible, to be violated by ghost condensation. Since not only black holes but also cosmology are expected to play important roles towards our better understanding of gravity, we consider a cosmological setup to test the theory of ghost condensation. In particular we shall show that the de Sitter entropy bound proposed by Arkani-Hamed, et.al. is satisfied if ghost inflation happened in the early epoch of our universe. We then propose a notion of cosmological Page time after inflation.

  6. Approach for removing ghost-images in remote field eddy current testing of ferromagnetic pipes

    Science.gov (United States)

    Luo, Q. W.; Shi, Y. B.; Wang, Z. G.; Zhang, W.; Zhang, Y.

    2016-10-01

    In the non-destructive testing of ferromagnetic pipes based on remote field eddy currents, an array of sensing coils is often used to detect local defects. While testing, the image that is obtained by sensing coils exhibits a ghost-image, which originates from both the transmitter and sensing coils passing over the same defects in pipes. Ghost-images are caused by transmitters and lead to undesirable assessments of defects. In order to remove ghost-images, two pickup coils are coaxially set to each other in remote field. Due to the time delay between differential signals tested by the two pickup coils, a Wiener deconvolution filter is used to identify the artificial peaks that lead to ghost-images. Because the sensing coils and two pickup coils all receive the same signal from one transmitter, they all contain the same artificial peaks. By subtracting the artificial peak values obtained by the two pickup coils from the imaging data, the ghost-image caused by the transmitter is eliminated. Finally, a relatively highly accurate image of local defects is obtained by these sensing coils. With proposed method, there is no need to subtract the average value of the sensing coils, and it is sensitive to ringed defects.

  7. Orbiter Water Dump Nozzles Redesign Lessons Learned

    Science.gov (United States)

    Rotter, Hank

    2017-01-01

    Hank Rotter, NASA Technical Fellow for Environmental Control and Life Support System, will provide the causes and lessons learned for the two Space Shuttle Orbiter water dump icicles that formed on the side of the Orbiter. He will present the root causes and the criticality of these icicles, along with the redesign of the water dump nozzles and lessons learned during the redesign phase.

  8. Anti-Dumping on and from China

    Institute of Scientific and Technical Information of China (English)

    Patrick H. Zhao

    2007-01-01

    @@ The past years saw an increased cases of anti-dumping on China mostly from the developed countries, some from developing countries. But Pakistan, a friendly neighbor to China, recently adds up to that list of ranks for an anti-dumping investigation on China.

  9. DUMPING SYNDROME IN A YOUNG-CHILD

    NARCIS (Netherlands)

    DEVRIES, TW; DODDEMA, JW; HEIJMANS, HSA

    1995-01-01

    We describe a 17-month-old child with dumping syndrome after plication of the right diaphragm. He presented with periods of abdominal distension and pallor, recurrent convulsions, glucosuria and refusal of Feeding. After changing the diet the symptoms disappeared. Conclusion Although dumping syndrom

  10. Ghost Imaging of Space Objects Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Ghost imaging is an optical imaging technique that utilizes the correlations between optical fields in two channels. One of the channels contains the object,...

  11. Ghost inflation and de Sitter entropy

    Science.gov (United States)

    Jazayeri, Sadra; Mukohyama, Shinji; Saitou, Rio; Watanabe, Yota

    2016-08-01

    In the setup of ghost condensation model the generalized second law of black hole thermodynamics can be respected under a radiatively stable assumption that couplings between the field responsible for ghost condensate and matter fields such as those in the Standard Model are suppressed by the Planck scale. Since not only black holes but also cosmology are expected to play important roles towards our better understanding of gravity, we consider a cosmological setup to test the theory of ghost condensation. In particular we shall show that the de Sitter entropy bound proposed by Arkani-Hamed, et al. is satisfied if ghost inflation happened in the early epoch of our universe and if there remains a tiny positive cosmological constant in the future infinity. We then propose a notion of cosmological Page time after inflation.

  12. An invisible wall put up by ghosts

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    <正>When I was a child, my grandmother would often tell me ghost stories. One of them was about an invisible wall that had been put up by ghosts.It was a winter night that was getting darker and darker, colder and colder. A lone farmer was driving his horse and cart along a country path. As he was getting close to his village, he could see the cemetery with the myriad tombs on both sides

  13. Montague Rhodes James, Collected Ghost Stories

    OpenAIRE

    Mantrant, Sophie

    2014-01-01

    A biblical scholar, palaeographer and lover of old manuscripts, Montague Rhodes James (1862–1936) published a great many scholarly works, but he is best remembered for his ghost stories, many of which were originally read aloud to friends. One of their distinguishing features is the richness of their antiquarian background and they are usually considered as among the finest achievements in what is sometimes labelled the ‘antiquarian subgenre’ of the ghost story. In his ‘Supernatural Horror in...

  14. Short term depression unmasks the ghost frequency.

    Directory of Open Access Journals (Sweden)

    Tjeerd V Olde Scheper

    Full Text Available Short Term Plasticity (STP has been shown to exist extensively in synapses throughout the brain. Its function is more or less clear in the sense that it alters the probability of synaptic transmission at short time scales. However, it is still unclear what effect STP has on the dynamics of neural networks. We show, using a novel dynamic STP model, that Short Term Depression (STD can affect the phase of frequency coded input such that small networks can perform temporal signal summation and determination with high accuracy. We show that this property of STD can readily solve the problem of the ghost frequency, the perceived pitch of a harmonic complex in absence of the base frequency. Additionally, we demonstrate that this property can explain dynamics in larger networks. By means of two models, one of chopper neurons in the Ventral Cochlear Nucleus and one of a cortical microcircuit with inhibitory Martinotti neurons, it is shown that the dynamics in these microcircuits can reliably be reproduced using STP. Our model of STP gives important insights into the potential roles of STP in self-regulation of cortical activity and long-range afferent input in neuronal microcircuits.

  15. Entangled spins and ghost-spins

    CERN Document Server

    Jatkar, Dileep P

    2016-01-01

    We study patterns of quantum entanglement in systems of spins and ghost-spins regarding them as simple quantum mechanical toy models for theories containing negative norm states. We define a single ghost-spin as in arXiv:1602.06505 [hep-th] as a 2-state spin variable with an indefinite inner product in the state space. We find that whenever the spin sector is disentangled from the ghost-spin sector (both of which could be entangled within themselves), the reduced density matrix obtained by tracing over all the ghost-spins gives rise to positive entanglement entropy for positive norm states, while negative norm states have an entanglement entropy with a negative real part and a constant imaginary part. However when the spins are entangled with the ghost-spins, there are new entanglement patterns in general. For systems where the number of ghost-spins is even, it is possible to find subsectors of the Hilbert space where positive norm states always lead to positive entanglement entropy after tracing over the gho...

  16. Ghost imaging with entangled photons and orbital angular momentum

    Science.gov (United States)

    Padgett, Miles

    We utilise the position and orbital angular momentum (OAM) correlations between the signal and idler photons generated in the down-conversion process to obtain ghost images of a phase object. By using an OAM phase filter, which is non-local with respect to the object, the ghost images exhibit isotropic edge-enhancement. The strong spatial correlations between the signal and idler photons generated by spontaneous parametric downconversion have been widely utilised in many different imaging systems. The use of a scanning single element detector to recover the spatial information in the signal and idler beams fundamentally limits the detection efficiency of the imaging system to a maximum of 1/N where N is the number of pixels in the image. Our approach overcomes this limitation by replacing the scanning detector by an intensified CCD camera, therefore detecting all photons irrespective of their position within the image. Using a camera in this way, coupled with the OAM edge-enhancement and image reconstruction techniques allows us to obtain images of phase objects with an average of fewer than one photon per image pixel.

  17. Heat transfer law in leaching dump

    Institute of Scientific and Technical Information of China (English)

    WU Ai-xiang; WANG Hong-jiang; XI Yong; YANG Bao-hua; LI Jian-feng; YIN Sheng-hua; ZHA Ke-bing

    2005-01-01

    Based on the law of temperature changes in the leaching dump and the forming process of heat flux, the basic balance equation of heat flow in dump was established, the dissipated heat flow from dump to the atmosphere was analyzed to estimate the surface temperature of the ore particle in dump and discover the law of forced heat convection of heat flow transfer in dump. And the lixiviate flow formula taking a certain heat flow out of dump was deduced by using the inversion method. Through theoretic analysis, combining Dexing copper mine heap leaching production practice, the results show that the heat flow of chalcopyrite leaching emitted is not so great, but the heat flow of pyrite leaching and sulphur oxidation produced take up a higher proportion of total heat flow; the dissipated heat flow takes up a lower proportion, and most of heat flow is absorbed by itself, thus the inside temperature rises gradually; and the saturation flow form for leaching is adopted, which makes the lixiviate seepage in the transitional flow or even in the turbulent flow, so as to accelerate the heat flow diffusing and keep the leaching dump temperature suitable for bacteria living.

  18. Diagnostics for High Power Targets and Dumps

    CERN Document Server

    Gschwendtner, E

    2012-01-01

    High power targets are generally used for neutrino, antiproton, neutron and secondary beam production whereas dumps are needed in beam waste management. In order to guarantee an optimized and safe use of these targets and dumps, reliable instrumentation is needed; the diagnostics in high power beams around targets and dumps is reviewed. The suite of beam diagnostics devices used in such extreme environments is discussed, including their role in commissioning and operation. The handling and maintenance of the instrumentation components in high radiation areas is also addressed.

  19. 27 CFR 19.748 - Dump/batch records.

    Science.gov (United States)

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 1 2010-04-01 2010-04-01 false Dump/batch records. 19.748... OF THE TREASURY LIQUORS DISTILLED SPIRITS PLANTS Records and Reports Processing Account § 19.748 Dump/batch records. (a) Format of dump/batch records. Proprietor's dump/batch records shall contain,...

  20. Tracking of the nuclear wavepacket motion in cyanine photoisomerization by ultrafast pump-dump-probe spectroscopy.

    Science.gov (United States)

    Wei, Zhengrong; Nakamura, Takumi; Takeuchi, Satoshi; Tahara, Tahei

    2011-06-01

    Understanding ultrafast reactions, which proceed on a time scale of nuclear motions, requires a quantitative characterization of the structural dynamics. To track such structural changes with time, we studied a nuclear wavepacket motion in photoisomerization of a prototype cyanine dye, 1,1'-diethyl-4,4'-cyanine, by ultrafast pump-dump-probe measurements in solution. The temporal evolution of wavepacket motion was examined by monitoring the efficiency of stimulated emission dumping, which was obtained from the recovery of a ground-state bleaching signal. The dump efficiency versus pump-dump delay exhibited a finite rise time, and it became longer (97 fs → 330 fs → 390 fs) as the dump pulse was tuned to longer wavelengths (690 nm → 950 nm → 1200 nm). This result demonstrates a continuous migration of the leading edge of the wavepacket on the excited-state potential from the Franck-Condon region toward the potential minimum. A slowly decaying feature of the dump efficiency indicated a considerable broadening of the wavepacket over a wide range of the potential, which results in the spread of a population distribution on the flat S(1) potential energy surface. The rapid migration as well as broadening of the wavepacket manifests a continuous nature of the structural dynamics and provides an intuitive visualization of this ultrafast reaction. We also discussed experimental strategies to evaluate reliable dump efficiencies separately from other ultrafast processes and showed a high capability and possibility of the pump-dump-probe method for spectroscopic investigation of unexplored potential regions such as conical intersections.

  1. Neutron Ghost Imaging Technology Research on CARR Reactor

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Ghost imaging is also known as quantum imaging. Different from the classical imaging, the neutron ghost imaging is based on the quantum mechanics properties of light field and its intrinsic parallel characteristic, and developed by new optical

  2. [The effect of somatostatin in dumping syndrome].

    Science.gov (United States)

    Tulassay, Z; Tulassay, T; Szathmári, M; Gohér, A; Tamás, G

    1990-11-04

    The effect of cyclic somatostatin on early and late dumping syndrome was studied in 12 patients with gastric resection. Each patient underwent two glucose challenges with 75 grams of glucose administered orally. In the control study isotonic sodium chloride was given, while in the other study cyclic somatostatin in a dose of 250 micrograms bolus injection followed by infusion of 80 ng/kg/min for a period of 270 minutes. In the control study all patients showed subjective symptoms of the early dumping syndrome with significant increases in pulse rate, hematocrit, and vasoactive intestinal polypeptide. Ten patients showed asymptomatic hypoglycemia, as a sign of the late dumping syndrome associated with a significant increases of insulin, gastric inhibitory peptide and glucagon levels. During the administration of somatostatin these changes failed to develop. These results indicate that somatostatin alleviates the symptoms of early and late postprandial dumping syndrome.

  3. The impact of the ghost-gluon vertex on the ghost Schwinger-Dyson equations

    CERN Document Server

    Aguilar, A C

    2014-01-01

    We derive an approximate dynamical equation for the form-factor of the ghost-gluon vertex that contributes to the Schwinger-Dyson equation of the ghost dressing function in the Landau gauge. In particular, we consider the "one-loop dressed" approximation of the corresponding equation governing the evolution of the ghost-gluon vertex, using fully dressed propagators and tree-level vertices in the relevant diagrams. Within this approximation, we then compute the aforementioned form factor for two special kinematic configurations, namely the soft gluon limit, in which the momentum carried by the gluon leg is zero, and the soft ghost limit, where the momentum of the anti-ghost leg vanishes. The results obtained display a considerable departure from the tree-level value, and are in rather good agreement with available lattice data. We next solve numerically the coupled system formed by the equation of the ghost dressing function and that of the the vertex form factor, in the soft ghost limit. Our results demonstra...

  4. European Anti-dumping Law and China

    Directory of Open Access Journals (Sweden)

    Piet Eeckhout

    1997-04-01

    Full Text Available The paper examines recent developments in the European Union's anti-dumping policy, as it is applied towards China. It concentrates on recent court cases involving dumping from China and on the basic non-market economy issue. The author essentially argues that the European Union's policy does not take account sufficiently of China's development towards a market economy, and that there are various legal flaws in the way the policy is applied.

  5. [Postgastrectomy dumping treated with octreotide (Sandostatin)].

    Science.gov (United States)

    Møller, T D; Carlsen, C U

    1993-06-07

    Somatostatin and the long acting somatostatin analogue Sandostatin have been shown to be effective in the management of dumping syndrome. We describe a patient with early dumping in whom this management provided total symptomatic relief. The doses was reduced from 50 micrograms to 12.5 micrograms s.c., t.i.d. At this dose clinical and biochemical parameters (blood pressure, pulse rate, packed cell volume, hematocrit, and blood glucose) were found to be within normal levels.

  6. Brane induced gravity: Ghosts and naturalness

    CERN Document Server

    Eglseer, Ludwig; Schneider, Robert

    2015-01-01

    Linear stability of brane induced gravity in two codimensions on a static pure tension background is investigated. By explicitly calculating the vacuum persistence amplitude of the corresponding quantum theory, we show that the parameter space is divided into two regions - one corresponding to a stable Minkowski vacuum on the brane and one being plagued by ghost instabilities. This analytical result affirms a recent nonlinear, but mainly numerical analysis. The main result is that the ghost is absent for a sufficiently large brane tension, in perfect agreement with a value expected from a natural effective field theory point of view. Unfortunately, the linearly stable parameter regime is either ruled out phenomenologically or destabilized due to nonlinearities. We argue that inflating brane backgrounds constitute the remaining window of opportunity. In the special case of a tensionless brane, we find that the ghost exists for any nonzero value of the induced gravity scale. Regarding this case, there are contr...

  7. Ghost cells: A journey in the dark…

    Science.gov (United States)

    Mehendiratta, Monica; Bishen, Kundendu A.; Boaz, Karen; Mathias, Yulia

    2012-01-01

    Ghost cells have been a topic of controversy since a long time. The appearance of these cells in different lesions has given it varying terms. In lesions like that of Calcifying cystic odontogenic tumor (CCOT), these cells have been termed as ‘Ghost cells’ whereas similar descriptive cells have been called shadow/translucent cells in non-odontogenic lesions like Craniopharyngiomas of the pituitary gland and Pilomatricomas of skin. Controversy arises because of the fact that there are varying opinions and incomplete knowledge about their origin, nature, significance and relation in different neoplasms. Irrespective of the origin, these cells are seen in odontogenic and non-odontogenic neoplasms, which probably direct us towards a missing link between these differing neoplasms. This article attempts to present a review on the concepts around these peculiar cells and shed some light on these ghosts that are still in dark. PMID:23814549

  8. Universality of testing ghost-free gravity

    CERN Document Server

    Edholm, James; Mazumdar, Anupam

    2016-01-01

    In this paper we show that there is a universal prediction for the Newtonian potential for an infinite derivative, ghost-free, quadratic curvature gravity. We show that in order to make such a theory ghost-free at a perturbative level, the Newtonian potential always falls-off as 1/r in the infrared limit, while at short distances the potential becomes non-singular. We provide examples which can potentially test the scale of gravitational non-locality up to 0.01 eV.

  9. A Contemporary Approach to Classify Ghost Cells Comprising Oral Lesions

    Science.gov (United States)

    Yadav, Sumit Kumar; Narwal, Anjali; Devi, Anju

    2015-01-01

    Ghost cells are swollen eosinophilic epithelial cells that have lost their nuclei but retain the cellular and nuclear outline. Pathologic ghost cell formation could be the process of aberrant keratinization or the result of coagulative necrosis. Ghost cells have been described in several odontogenic lesions, which include calcifying epithelial odontogenic cysts or tumours like odontomas, ameloblastic fibro-odontomas, and ameloblastomas. This article present a view on the formation of ghost cells with proposal/introduction of a classification for ghost cell lesions of the oral cavity in an attempt to organize these lesions for the better understanding and academic purpose. PMID:26501039

  10. Ghosting phenomena in single photon counting imagers with Vernier anode.

    Science.gov (United States)

    Yang, Hao; Zhao, Baosheng; Qiurong, Yan; Liu, Yong'an; Hu, Huijun

    2011-02-01

    We provide the ghosting theory of two-dimensional Vernier anode based imagers. The single photon counting detection system based on Vernier anode is constructed. The ghosting, which occurs during the decoding of two-dimensional Vernier anode, and its possible solutions are described in detail. On the basis of the discussion of the decoding algorithm, the ghosting theoretical model is established. Phase conditions on which imaging ghosting can be avoided and the probability distribution function are proposed; the root causes of ghosting of two-dimensional Vernier anode are also discussed.

  11. Establishment of ocean dumping area capacity assessment model

    Institute of Scientific and Technical Information of China (English)

    WANG Zhizu; ZUO Juncheng; XU Ren; JIN Zuowen; CHEN Meixiang

    2016-01-01

    Dumping area capacity is mainly affected by the hydrodynamic process (tidal sediment, storm surge and wave, etc.) as well as the size and depth of dumping area. Based on three-dimensional ocean circulation model known as FVCOM (Finite Volume Coast and Ocean Model) and the stochastic dynamic statistical analysis model, taking advantage of dumping ground topography evolution and dumping quantity, the author aims to discuss the influence of hydrodynamic processes and dumping activity so as to built a new model of ocean dumping area capacity. With the data of depth and dumped amount in the dumping area, the changes of bottom topographic which caused by tidal current under the natural condition based on the FVCOM hydrodynamic and sediment module, the author strive to analyze the statistical relation of the changes for dumping amount, tidal current and bottom topographic. Through real data to fit revision coefficient values, which will be regarded as topographic changes reference value affected by wave and storm surges. Thus taking this evaluation as the long-term changes in the dumping capacity. In the premise of setting up the threshold of bottom topographic changes, the dumping area capacity is calculated. Take Yangtze Estuary No. 1 dumping area as an example, As the water depth reduces by 0.5 m annually, the dumping area capacity is about 6.7 million m3/a, the model results are in reasonable agreement with the actual amount. Then the model is validated in Luoyuan Bay dumping area, Shengsishangchuan Mountain dumping area, Dongding dumping area, Dongshan dumping area, and Wenzhou Port dumping area, it is turns out the results are similar to that of the actual observations.

  12. 'Ghost of Mirach' Rears its Spooky Head

    Science.gov (United States)

    2008-01-01

    [figure removed for brevity, see original site] [figure removed for brevity, see original site] [figure removed for brevity, see original site] Visible/DSS Click on image for larger version Ultraviolet/GALEX Click on image for larger version Poster Version Click on image for larger version The 'Ghost of Mirach' galaxy is shown in visible light on the left, and in ultraviolet as seen by NASA's Galaxy Evolution Explorer on the right. The fields of view are identical in both pictures, with the Ghost of Mirach a galaxy called NGC 404 seen as the whitish spot in the center of the images. Mirach is a red giant star that looms large in visible light. Because NGC 404 is lost in the glare of this star, it was nicknamed the Ghost of Mirach. But when the galaxy is viewed in ultraviolet light, it comes to 'life,' revealing a never-before-seen ring. This ring, seen in blue in the picture on the right, contains new stars a surprise considering that the galaxy was previously thought to be, essentially, dead. The field of view spans 55,000 light years across. The Ghost of Mirach is located 11 million light-years from Earth. The star Mirach is very close in comparison it is only 200 light-years away and is visible with the naked eye. The visible data come from the Digitized Sky Survey of the Space Telescope Science Institute in Baltimore, Md.

  13. Optical encryption with selective computational ghost imaging

    Science.gov (United States)

    Zafari, Mohammad; kheradmand, Reza; Ahmadi-Kandjani, Sohrab

    2014-10-01

    Selective computational ghost imaging (SCGI) is a technique which enables the reconstruction of an N-pixel image from N measurements or less. In this paper we propose an optical encryption method based on SCGI and experimentally demonstrate that this method has much higher security under eavesdropping and unauthorized accesses compared with previous reported methods.

  14. More on ghosts in DGP model

    CERN Document Server

    Gorbunov, D; Sibiryakov, S M; Gorbunov, Dmitry; Koyama, Kazuya; Sibiryakov, Sergei

    2006-01-01

    It is shown by an explicit calculation that the excitations about the self-accelerating cosmological solution of the Dvali--Gabadaze--Porrati model contain a ghost mode. This raises serious doubts about viability of this solution. Our analysis reveals the similarity between the quadratic theory for the perturbations around the self-accelerating Universe and an Abelian gauge model with two Stueckelberg fields.

  15. 'Ghost of Mirach' Rears its Spooky Head

    Science.gov (United States)

    2008-01-01

    [figure removed for brevity, see original site] [figure removed for brevity, see original site] [figure removed for brevity, see original site] Visible/DSS Click on image for larger version Ultraviolet/GALEX Click on image for larger version Poster Version Click on image for larger version The 'Ghost of Mirach' galaxy is shown in visible light on the left, and in ultraviolet as seen by NASA's Galaxy Evolution Explorer on the right. The fields of view are identical in both pictures, with the Ghost of Mirach a galaxy called NGC 404 seen as the whitish spot in the center of the images. Mirach is a red giant star that looms large in visible light. Because NGC 404 is lost in the glare of this star, it was nicknamed the Ghost of Mirach. But when the galaxy is viewed in ultraviolet light, it comes to 'life,' revealing a never-before-seen ring. This ring, seen in blue in the picture on the right, contains new stars a surprise considering that the galaxy was previously thought to be, essentially, dead. The field of view spans 55,000 light years across. The Ghost of Mirach is located 11 million light-years from Earth. The star Mirach is very close in comparison it is only 200 light-years away and is visible with the naked eye. The visible data come from the Digitized Sky Survey of the Space Telescope Science Institute in Baltimore, Md.

  16. Three-Dimensional Gravity and String Ghosts

    OpenAIRE

    Carlip, S.; Kogan, I. I.

    1991-01-01

    It is known that much of the structure of string theory can be derived from three-dimensional topological field theory and gravity. We show here that, at least for simple topologies, the string diffeomorphism ghosts can also be explained in terms of three-dimensional physics.

  17. The Color Antisymmetric Ghost Propagator and One-Loop Vertex Renormalization

    OpenAIRE

    Furui, Sadataka

    2007-01-01

    The color matrix elements of the ghost triangle diagram that appears in the triple gluon vertex and the ghost-ghost-gluon triangle diagram that appears in the ghost-gluon-ghost vertex are calculated. The ghost-ghost-gluon triangle contains a loop consisting of two color diagonal ghosts and one gluon and a loop consisting of two color antisymmetric ghosts and one gluon. Consequently, the pQCD argument in the infrared region based on the one particle irreducible diagram should be modified. Impl...

  18. Collective Deceleration: Toward a Compact Beam Dump

    Energy Technology Data Exchange (ETDEWEB)

    Wu, H.-C.; /Munich, Max Planck Inst. Quantenopt.; Tajima, T.; Habs, D.; /Munich, Max Planck Inst. Quantenopt. /Munich U.; Chao, A.W.; /SLAC; Meyer-ter-Vehn, J.; /Munich, Max Planck Inst. Quantenopt.

    2011-11-28

    With the increasing development of laser accelerators, the electron energy is already beyond GeV and even higher in near future. Conventional beam dump based on ionization or radiation loss mechanism is cumbersome and costly, also has radiological hazards. We revisit the stopping power of high-energy charged particles in matter and discuss the associated problem of beam dump from the point of view of collective deceleration. The collective stopping length in an ionized gas can be several orders of magnitude shorter than the Bethe-Bloch and multiple electromagnetic cascades stopping length in solid. At the mean time, the tenuous density of the gas makes the radioactivation negligible. Such a compact and non-radioactivating beam dump works well for short and dense bunches, which is typically generated from laser wakefield accelerator.

  19. Dumping the decelerated beams of CLIC

    CERN Document Server

    Jeanneret, Bernard

    2011-01-01

    The spent drive beam must be cleanly extracted and bent away from the decelerator axis at the end of each CLIC decelerator in order to leave space for injecting a fresh beam train in the next sector. Then the spent beam must be safely absorbed. A compact extraction system made of a single dipole is proposed. The spent beam is driven to a water dump located at 20m downstream of the extraction point and transversely 6m away of the axis of the main linac. An adequate spread of the beam impact map on the dump offers small temperature excursions in both the dump and its entrance window, allowing for reliable operation and a long lifetime of the system.

  20. Building and shaping overburden dumps in layers

    Energy Technology Data Exchange (ETDEWEB)

    Pichler, E.

    1988-08-01

    Discusses problem of stabilizing overburden dumps soon to be built to heights of 120-220 m at mines in the Krusna Hora brown coalfield. Describes mathematics involved in calculating critical height and stability of dumps with a constant slope angle and in determining critical height of layers with 32-38 degree slope angles. Shows in tabular form the relationship between degree of stability, critical height and type of material. Describes methods of constructing dumps in layers, which has become more viable with increasing development of belt conveyor technology. Methods described require use of ZP 2500 and ZP 6600 spreaders, but in future it is expected that ZP 10000 and ZP 13000 spreaders,which have longer reach, will be used to better effect. Concludes by giving examples of planned layer heights for the Merkur, Ceskoslovenska Armada and Jan Sverma mines, based on calculation of intergranular angle of internal friction. 5 refs.

  1. EPI Nyquist ghost and geometric distortion correction by two-frame phase labeling.

    Science.gov (United States)

    Xie, Victor B; Lyu, Mengye; Wu, Ed X

    2017-05-01

    To develop a new Nyquist ghost and geometric distortion correction method in echo planar imaging (EPI) using parallel imaging. Two frames of EPI data are acquired with normal and phase-labeled sequence. The phase label is applied by modifying the PE prephase gradient to shift the central echo by one echo spacing. GRAPPA weights are trained from both frames and used to reconstruct images from positive or negative echoes in each frame to remove Nyquist ghost. Geometric distortion is then corrected by the B0 field map generated from the phase difference between positive and negative echo images. Phantom and in vivo experiments at 7 Tesla (T) and 3T were performed to evaluate the proposed method. Nyquist ghost was greatly reduced in all images even under oblique imaging and poor eddy current conditions, yielding significant improvements over the existing reference scan and image entropy minimization based methods. Image geometries were fully restored after distortion correction. Phantom results indicated that the signal-to-noise ratio efficiency was largely preserved while fMRI results showed no apparent degradation of temporal resolution. The proposed method provides robust correction of both Nyquist ghost and geometric distortion in EPI, and it is particularly suitable for dynamic EPI applications. Magn Reson Med 77:1749-1761, 2017. © 2016 International Society for Magnetic Resonance in Medicine. © 2016 International Society for Magnetic Resonance in Medicine.

  2. Phase-Sensitive Coherence and the Classical-Quantum Boundary in Ghost Imaging

    Science.gov (United States)

    Erkmen, Baris I.; Hardy, Nicholas D.; Venkatraman, Dheera; Wong, Franco N. C.; Shapiro, Jeffrey H.

    2011-01-01

    The theory of partial coherence has a long and storied history in classical statistical optics. the vast majority of this work addresses fields that are statistically stationary in time, hence their complex envelopes only have phase-insensitive correlations. The quantum optics of squeezed-state generation, however, depends on nonlinear interactions producing baseband field operators with phase-insensitive and phase-sensitive correlations. Utilizing quantum light to enhance imaging has been a topic of considerable current interest, much of it involving biphotons, i.e., streams of entangled-photon pairs. Biphotons have been employed for quantum versions of optical coherence tomography, ghost imaging, holography, and lithography. However, their seemingly quantum features have been mimicked with classical-sate light, questioning wherein lies the classical-quantum boundary. We have shown, for the case of Gaussian-state light, that this boundary is intimately connected to the theory of phase-sensitive partial coherence. Here we present that theory, contrasting it with the familiar case of phase-insensitive partial coherence, and use it to elucidate the classical-quantum boundary of ghost imaging. We show, both theoretically and experimentally, that classical phase-sensitive light produces ghost imaging most closely mimicking those obtained in biphotons, and we derived the spatial resolution, image contrast, and signal-to-noise ratio of a standoff-sensing ghost imager, taking into account target-induced speckle.

  3. Phase-Sensitive Coherence and the Classical-Quantum Boundary in Ghost Imaging

    Science.gov (United States)

    Erkmen, Baris I.; Hardy, Nicholas D.; Venkatraman, Dheera; Wong, Franco N. C.; Shapiro, Jeffrey H.

    2011-01-01

    The theory of partial coherence has a long and storied history in classical statistical optics. the vast majority of this work addresses fields that are statistically stationary in time, hence their complex envelopes only have phase-insensitive correlations. The quantum optics of squeezed-state generation, however, depends on nonlinear interactions producing baseband field operators with phase-insensitive and phase-sensitive correlations. Utilizing quantum light to enhance imaging has been a topic of considerable current interest, much of it involving biphotons, i.e., streams of entangled-photon pairs. Biphotons have been employed for quantum versions of optical coherence tomography, ghost imaging, holography, and lithography. However, their seemingly quantum features have been mimicked with classical-sate light, questioning wherein lies the classical-quantum boundary. We have shown, for the case of Gaussian-state light, that this boundary is intimately connected to the theory of phase-sensitive partial coherence. Here we present that theory, contrasting it with the familiar case of phase-insensitive partial coherence, and use it to elucidate the classical-quantum boundary of ghost imaging. We show, both theoretically and experimentally, that classical phase-sensitive light produces ghost imaging most closely mimicking those obtained in biphotons, and we derived the spatial resolution, image contrast, and signal-to-noise ratio of a standoff-sensing ghost imager, taking into account target-induced speckle.

  4. Geotechnical aspects for the optimization of dump design at Chinh Bac Mine waste dump in Vietnam

    Energy Technology Data Exchange (ETDEWEB)

    Fuchsschwanz, M.; Ziegler, M. [Aachen Univ., Aachen (Germany). Dept. of Geotechnical Engineering; Ahmad, S.; Fernandez, J.B.P.; Martens, P.N. [Aachen Univ., Aachen (Germany). Inst. of Mining Engineering; Deissmann, G. [Brenk Systemplanung GmbH, Aachen (Germany)

    2009-07-01

    Vietnam's Quang Ninh province is one of the country's most important coal producing regions. Several open pit mines are being operated in the area by Nui Beo Coal Company (NBCC). The construction of large waste dumps for overburden removed by blasting have led to environmental problems at the mining sites, including dust emissions from mining and dumping operations; ground and surface water contamination by acid mine drainage; and slope stability problems caused by heavy rainfall and dump movements. This paper discussed investigations regarding the influence of the dump layout on slope stability and erosion. The paper described the project site and ongoing activities for the development of optimized stabilization and rehabilitation concepts with a particular focus on geotechnical aspects. The site was described in terms of coal and waste rock production; Chinh Bac waste rock dump; crack mapping; material properties of dumped material; density; and settlements. Ongoing activities focus on the effect of benches on slope stability; influence of benches on erosion; and layered dumping. 7 refs., 4 figs.

  5. A new dump system design for stray light reduction of Thomson scattering diagnostic system on EAST

    Science.gov (United States)

    Xiao, Shumei; Zang, Qing; Han, Xiaofeng; Wang, Tengfei; Yu, Jin; Zhao, Junyu

    2016-07-01

    Thomson scattering (TS) diagnostic is an important diagnostic for measuring electron temperature and density during plasma discharge. However, the measurement of Thomson scattering signal is disturbed by the stray light easily. The stray light sources in the Experimental Advanced Superconducting Tokamak (EAST) TS diagnostic system were analyzed by a simulation model of the diagnostic system, and simulation results show that the dump system is the primary stray light source. Based on the optics theory and the simulation analysis, a novel dump system including an improved beam trap was proposed and installed. The measurement results indicate that the new dump system can reduce more than 60% of the stray light for the diagnostic system, and the influence of stray light on the error of measured density decreases.

  6. A new dump system design for stray light reduction of Thomson scattering diagnostic system on EAST.

    Science.gov (United States)

    Xiao, Shumei; Zang, Qing; Han, Xiaofeng; Wang, Tengfei; Yu, Jin; Zhao, Junyu

    2016-07-01

    Thomson scattering (TS) diagnostic is an important diagnostic for measuring electron temperature and density during plasma discharge. However, the measurement of Thomson scattering signal is disturbed by the stray light easily. The stray light sources in the Experimental Advanced Superconducting Tokamak (EAST) TS diagnostic system were analyzed by a simulation model of the diagnostic system, and simulation results show that the dump system is the primary stray light source. Based on the optics theory and the simulation analysis, a novel dump system including an improved beam trap was proposed and installed. The measurement results indicate that the new dump system can reduce more than 60% of the stray light for the diagnostic system, and the influence of stray light on the error of measured density decreases.

  7. LAW PROTECTION FOR DOMESTIC INDUSTRIES DUE TO DUMPING PRACTICE

    Directory of Open Access Journals (Sweden)

    Anita Kamilah

    2015-12-01

    Full Text Available International trade is business transactions conducted across borders, which has the goal accumulated maximum profit (profit optimal. In this implementation, corporations often do business by unfair competition, such as dumping, which could damage the order of the importing country trading system. The problem is what factors are causing a corporation carrying out the practice of dumping, and also; and How is legal protection against a country as a result of dumping practices. Factors that cause dumping, to profit by setting lower prices in the import market and the monopoly in the market of the importing country. A form of protection for countries that suffered losses as a result of dumping practices which could impose "anti-dumping duty", as a punishment for the exporting country. Due to losses caused by dumping, the government should make a law that specifically regulates the protection of domestic industry due to the practice of dumping.

  8. 30 CFR 57.9301 - Dump site restraints.

    Science.gov (United States)

    2010-07-01

    ... SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Loading, Hauling, and Dumping Safety Devices, Provisions, and Procedures for Roadways, Railroads, and Loading and Dumping Sites...

  9. Replacing the Beam Dump at the Booster

    CERN Multimedia

    2013-01-01

    The PS Booster Dump, designed in the 1960’s to cope with beam energies in the order of 800 MeV, has been dismantled and replaced with a new one, capable of withstanding the 2 GeV beam provided by the upcoming LINAC4 at CERN. This video shows the installation of that new dump core inside a one-metre diameter cavity, surrounded by five shielding rings made of concrete and steel. It is the culmination of months of preparation, an interdisciplinary work involving several teams from the Engineering, Beams and Technology Departments, as well as the collaboration and supervision of radio-protection experts.

  10. Replacing the Beam Dump at the Booster

    CERN Multimedia

    2013-01-01

    The PS Booster Dump, designed in the 1960’s to cope with beam energies in the order of 800 MeV, has been dismantled and replaced with a new one, capable of withstanding the 2 GeV beam provided by the upcoming LINAC4 at CERN. This video shows the installation of that new dump core inside a one-metre diameter cavity, surrounded by five shielding rings made of concrete and steel. It is the culmination of months of preparation, an interdisciplinary work involving several teams from the Engineering, Beams and Technology Departments, as well as the collaboration and supervision of radio-protection experts.

  11. Social dumping - supranational regulering og dens implikationer

    OpenAIRE

    Hansen, Mia Pough; Christensen, Nadja Zea Lintrup; Gregersen, Mille Natalie

    2015-01-01

    This paper aims at explaining why the institutional integration in the EU creates social dumping in Denmark. The study is based on a case study, which examines the posting of workers directive (96/71/EC). In explaining how the directive leads to social dumping, we use outcome-explanatory process-tracing. This is to examine how the causal mechanisms X, leads to an outcome Y. Concepts from Historical Institutionalism such as spill-over and Rational Choice Institutionalisms principal-agent theor...

  12. Landfills - OPEN_DUMPS_IDEM_IN: Open Dump Sites in Indiana (Indiana Department of Environmental Management, Point Shapefile)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — OPEN_DUMPS_IDEM_IN is a point shapefile that contains open dump site locations in Indiana, provided by personnel of Indiana Department of Environmental Management,...

  13. 7 CFR 46.22 - Accounting for dumped produce.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Accounting for dumped produce. 46.22 Section 46.22... Market Receivers § 46.22 Accounting for dumped produce. A clear and complete record shall be maintained... justifying dumping shall be forwarded to the consignor or joint account partner with the accounting and...

  14. 30 CFR 56.19103 - Dumping facilities and loading pockets.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Dumping facilities and loading pockets. 56.19103 Section 56.19103 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR... Personnel Hoisting Shafts § 56.19103 Dumping facilities and loading pockets. Dumping facilities and...

  15. 45 CFR 152.28 - Preventing insurer dumping.

    Science.gov (United States)

    2010-10-01

    ... 45 Public Welfare 1 2010-10-01 2010-10-01 false Preventing insurer dumping. 152.28 Section 152.28...-EXISTING CONDITION INSURANCE PLAN PROGRAM Oversight § 152.28 Preventing insurer dumping. (a) General rule... for a determination of dumping. A PCIP shall establish procedures to identify and report to...

  16. 30 CFR 57.19103 - Dumping facilities and loading pockets.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Dumping facilities and loading pockets. 57.19103 Section 57.19103 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR... MINES Personnel Hoisting Shafts § 57.19103 Dumping facilities and loading pockets. Dumping...

  17. Normalized iterative denoising ghost imaging based on the adaptive threshold

    Science.gov (United States)

    Li, Gaoliang; Yang, Zhaohua; Zhao, Yan; Yan, Ruitao; Liu, Xia; Liu, Baolei

    2017-02-01

    An approach for improving ghost imaging (GI) quality is proposed. In this paper, an iteration model based on normalized GI is built through theoretical analysis. An adaptive threshold value is selected in the iteration model. The initial value of the iteration model is estimated as a step to remove the correlated noise. The simulation and experimental results reveal that the proposed strategy reconstructs a better image than traditional and normalized GI, without adding complexity. The NIDGI-AT scheme does not require prior information regarding the object, and can also choose the threshold adaptively. More importantly, the signal-to-noise ratio (SNR) of the reconstructed image is greatly improved. Therefore, this methodology represents another step towards practical real-world applications.

  18. THE REPRESENTATION OF THE GHOST ARCHETYPE IN THE CANTERVILLE GHOST BY OSCAR WILDE

    Directory of Open Access Journals (Sweden)

    Safaryan Agata Vladimirovna

    2015-03-01

    Full Text Available The article touches upon the actual interdisciplinary problems of modern cognitive linguistics, psychology, literary criticism and is related to the study of the archetypal representations of ethnicity and changes reflected in the linguistic consciousness. These changes are mainly influenced by the works of fiction and the role of writer's worldview in their formation. Guided by the thesis of universality of the archetypes, the author mentions that though the archetype represents the inherent characteristics of certain ethnic and cultural space, it retains the features which make an image recognizable at all times. By this fact the author explains the existence of beliefs in ghosts with different embodiments in all cultures. The awakening of the archetype is caused by certain historical events, i.e. the revival and further embodiment of the ghost archetype was the result of reversion to the cultural heritage during the Victorian England. The complex analysis of the means of speech representation that called up the realization of the ghost archetype in Oscar Wilde's short story The Canterville Ghost allowed to reveal that alongside with features that constitute the archetypal nature of ghosts in general, there appear the ones peculiar to the author's individual worldview, which either complement or change the existing notions about this being from another world.

  19. Creation of Ghost Illusions Using Metamaterials in Wave Dynamics

    CERN Document Server

    Jiang, Weixiang; Han, Tiancheng; Zhang, Shuang; Cui, Tiejun

    2013-01-01

    The creation of wave-dynamic illusion functionality is of great interests to various scientific communities, which can potentially transform an actual perception into the pre-controlled perception, thus empowering unprecedented applications in the advanced-material science, camouflage, cloaking, optical and/or microwave cognition, and defense security, etc. By using the space transformation theory and engineering capability of metamaterials, we propose and realize a functional ghost illusion device, which is capable of creating wave-dynamic virtual ghost images off the original object's position under the illumination of electromagnetic waves. The scattering signature of the object is thus ghosted and perceived as multiple ghost targets with different geometries and compositions. The ghost-illusion material, being inhomogeneous and anisotropic, was realized by thousands of varying unit cells working at non-resonance. The experimental demonstration of the ghost illusion validates our theory of scattering metam...

  20. Unique railcar dump cuts port costs

    Energy Technology Data Exchange (ETDEWEB)

    Harris, M.

    1986-07-01

    A key element in a Suneel Alaska Corp. coal transfer facility is a railcar dumping system, a pit and conveyor arrangement that transfers coal from railcars to temporary stockpiles. The same principles used in the design should have applications at other bulk unloading facilities. The $1.5 million system is compact, minimizes groundwater problems, and allows fast unloading from the railcar.

  1. Multi-scale Adaptive Computational Ghost Imaging

    Science.gov (United States)

    Sun, Shuai; Liu, Wei-Tao; Lin, Hui-Zu; Zhang, Er-Feng; Liu, Ji-Ying; Li, Quan; Chen, Ping-Xing

    2016-11-01

    In some cases of imaging, wide spatial range and high spatial resolution are both required, which requests high performance of detection devices and huge resource consumption for data processing. We propose and demonstrate a multi-scale adaptive imaging method based on the idea of computational ghost imaging, which can obtain a rough outline of the whole scene with a wide range then accordingly find out the interested parts and achieve high-resolution details of those parts, by controlling the field of view and the transverse coherence width of the pseudo-thermal field illuminated on the scene with a spatial light modulator. Compared to typical ghost imaging, the resource consumption can be dramatically reduced using our scheme.

  2. The Ghostly Workings of Danish Accountability Policies

    DEFF Research Database (Denmark)

    Pors, Justine Grønbæk

    2016-01-01

    This article proposes a framework for thinking about the ghostly, thus arguing that policy can be understood as a landscape of intersecting and colliding temporalities from which arouse curious workings of barely-there forces, spooky energies and vibrating saturations of affective ambivalences. I...... present an empirical study of a policy agenda of introducing an assessment culture and improving the management of the Danish public school. I explore how all the routines and habits deemed outdated and sought annihilated by a new policy paradigm continue to haunt head teachers as seething presence...... of lurking resistance towards the policy aims as well as insidious doubts. Thinking about the ghostly contributes to studies of education policy by locating the reality of power in the mundane everyday doings and experiences of educational practitioners and insisting on the very tangled way people sense...

  3. Ghost and singularity free theories of gravity

    CERN Document Server

    Buoninfante, L; Mazumdar, A

    2016-01-01

    Albert Einstein's General Relativity (GR) from 1916 has become the widely accepted theory of gravity and been tested observationally to a very high precision at different scales of energy and distance. At the same time, there still remain important questions to resolve. The presence of cosmological and black hole singularities are examples of problems at the classical level which strongly suggest the incompleteness of GR at short distances (high energy). Furthermore, at the quantum level GR is not UV complete, namely it is not perturbatively renormalizable. These two kind of questions, classical and quantum, could be closely related as both concern short-distance (high energy) physics. Most of the work try to solve these problems modifying GR by considering finite higher order derivative terms. Fourth Order Gravity, for example, turns out to be renormalizable, but at the same time it introduces ghost. To avoid both UV divergence and presence of ghost one could consider an infinite set of higher derivative ter...

  4. Experimental x-ray ghost imaging

    CERN Document Server

    Pelliccia, Daniele; Scheel, Mario; Cantelli, Valentina; Paganin, David M

    2016-01-01

    We report an experimental proof of principle for ghost imaging in the hard x-ray energy range. We used a synchrotron x-ray beam that was split using a thin crystal in Laue diffraction geometry. With an ultra-fast imaging camera, we were able to image x-rays generated by isolated electron bunches. At this time scale, the shot noise of the synchrotron emission process is measurable as speckles, leading to speckle correlation between the two beams. The integrated transmitted intensity from a sample located in the first beam was correlated with the spatially resolved intensity measured on the second, empty, beam to retrieve the shadow of the sample. The demonstration of ghost imaging with hard x-rays may open the way to protocols to reduce radiation damage in medical imaging and in non-destructive structural characterization using Free Electron Lasers.

  5. Experimental X-Ray Ghost Imaging

    Science.gov (United States)

    Pelliccia, Daniele; Rack, Alexander; Scheel, Mario; Cantelli, Valentina; Paganin, David M.

    2016-09-01

    We report an experimental proof of principle for ghost imaging in the hard-x-ray energy range. We use a synchrotron x-ray beam that is split using a thin crystal in Laue diffraction geometry. With an ultrafast imaging camera, we are able to image x rays generated by isolated electron bunches. At this time scale, the shot noise of the synchrotron emission process is measurable as speckles, leading to speckle correlation between the two beams. The integrated transmitted intensity from a sample located in the first beam is correlated with the spatially resolved intensity measured in the second, empty, beam to retrieve the shadow of the sample. The demonstration of ghost imaging with hard x rays may open the way to protocols to reduce radiation damage in medical imaging and in nondestructive structural characterization using free electron lasers.

  6. Exorcising the Ostrogradsky ghost in coupled systems

    Science.gov (United States)

    Klein, Remko; Roest, Diederik

    2016-07-01

    The Ostrogradsky theorem implies that higher-derivative terms of a single mechanical variable are either trivial or lead to additional, ghost-like degrees of freedom. In this letter we systematically investigate how the introduction of additional variables can remedy this situation. Employing a Lagrangian analysis, we identify conditions on the La-grangian to ensure the existence of primary and secondary constraints that together imply the absence of Ostrogradsky ghosts. We also show the implications of these conditions for the structure of the equations of motion as well as possible redefinitions of the variables. We discuss applications to analogous higher-derivative field theories such as multi-Galileons and beyond Horndeski.

  7. The Ghostly Workings of Danish Accountability Policies

    DEFF Research Database (Denmark)

    Pors, Justine Grønbæk

    2016-01-01

    This article proposes a framework for thinking about the ghostly, thus arguing that policy can be understood as a landscape of intersecting and colliding temporalities from which arouse curious workings of barely-there forces, spooky energies and vibrating saturations of affective ambivalences. I...... present an empirical study of a policy agenda of introducing an assessment culture and improving the management of the Danish public school. I explore how all the routines and habits deemed outdated and sought annihilated by a new policy paradigm continue to haunt head teachers as seething presence...... of lurking resistance towards the policy aims as well as insidious doubts. Thinking about the ghostly contributes to studies of education policy by locating the reality of power in the mundane everyday doings and experiences of educational practitioners and insisting on the very tangled way people sense...

  8. Superrenormalizable quantum gravity with complex ghosts

    CERN Document Server

    Modesto, Leonardo

    2015-01-01

    We suggest and briefly review a new sort of superrenormalizable models of higher derivative quantum gravity. The higher derivative terms in the action can be introduced in such a way that all the unphysical massive states have complex poles. According to the literature on Lee-Wick quantization, in this case the theory can be formulated as unitary, since all massive ghosts-like degrees of freedom are unstable.

  9. Superrenormalizable quantum gravity with complex ghosts

    Directory of Open Access Journals (Sweden)

    Leonardo Modesto

    2016-04-01

    Full Text Available We suggest and briefly review a new sort of superrenormalizable models of higher derivative quantum gravity. The higher derivative terms in the action can be introduced in such a way that all the unphysical massive states have complex poles. According to the literature on Lee–Wick quantization, in this case the theory can be formulated as unitary, since all massive ghosts-like degrees of freedom are unstable.

  10. Three point SUSY Ward identities without Ghosts

    CERN Document Server

    Walker, M L

    2004-01-01

    We utilise a non-local gauge transform which renders the entire action of SUSY QED invariant and respects the SUSY algebra modulo the gauge-fixing condition, to derive two- and three-point ghost-free SUSY Ward identities in SUSY QED. We use the cluster decomposition principle to find the Green's function Ward identities and then takes linear combinations of the latter to derive identities for the proper functions.

  11. Ghost Equations and Diffeomorphism Invariant Theories

    CERN Document Server

    Piguet, O

    2000-01-01

    Four-dimensional Einstein gravity in the Palatini first order formalism is shown to possess a vector supersymmetry of the same type as found in the topological theories for Yang-Mills fields. A peculiar feature of the gravitational theory, characterized by diffeomorphism invariance, is a direct link of vector supersymmetry with the field equation of motion for the Faddeev-Popov ghost of diffeomorphisms.

  12. Esophageal Rupture After Ghost Pepper Ingestion.

    Science.gov (United States)

    Arens, Ann; Ben-Youssef, Leila; Hayashi, Sandra; Smollin, Craig

    2016-12-01

    The ghost pepper, or "bhut jolokia," is one of the hottest chili peppers in the world. Ghost peppers have a measured "heat" of > 1,000,000 Scoville heat units (SHU), more than twice the strength of a habanero pepper. To our knowledge, no significant adverse effects of ghost pepper ingestion have been reported. A 47-year-old man presented to the Emergency Department (ED) with severe abdominal and chest pain subsequent to violent retching and vomiting after eating ghost peppers as part of a contest. A subsequent chest x-ray study showed evidence of a left-sided pleural effusion and patchy infiltrates. A computed tomography scan of the abdomen and pelvis showed pneumomediastinum with air around the distal esophagus, suggestive of a spontaneous esophageal perforation and a left-sided pneumothorax. The patient was intubated and taken immediately to the operating room, where he was noted to have a 2.5-cm tear in the distal esophagus, with a mediastinal fluid collection including food debris, as well as a left-sided pneumothorax. The patient was extubated on hospital day 14, and was discharged home with a gastric tube in place on hospital day 23. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Spontaneous esophageal rupture, Boerhaave syndrome, is a rare condition encountered by emergency physicians, with a high mortality rate. This case serves as an important reminder of a potentially life- threatening surgical emergency initially interpreted as discomfort after a large spicy meal. Copyright © 2016 Elsevier Inc. All rights reserved.

  13. Heralded single-photon ghost imaging

    CERN Document Server

    Aspden, Reuben S; Boyd, Robert W; Padgett, Miles J

    2013-01-01

    Correlated-photon imaging, popularly known as ghost imaging, is a technique whereby an image is formed from light that has never interacted with the object. In ghost imaging experiments two correlated light fields are produced. One of these fields illuminates the object, and the other field is measured by a spatially resolving detector. In the quantum regime these correlated light fields entail entangled photons produced by spontaneous parametric down-conversion. To date, all correlated-photon ghost-imaging experiments have scanned a single-pixel detector through the field of view to obtain the spatial information. However, scanning leads to a poor sampling efficiency, which becomes worse as the number of pixels N in the image is increased. In this work we overcome such limitations by using a time-gated camera to record the single-photon events across the full scene. We produce high-contrast images in either the image plane or far-field of the down-conversion source, taking advantage of the EPR-like correlati...

  14. QCD ghost f(T)-gravity model

    Energy Technology Data Exchange (ETDEWEB)

    Karami, K.; Abdolmaleki, A.; Asadzadeh, S. [University of Kurdistan, Department of Physics, Sanandaj (Iran, Islamic Republic of); Safari, Z. [Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), Maragha (Iran, Islamic Republic of)

    2013-09-15

    Within the framework of modified teleparallel gravity, we reconstruct a f(T) model corresponding to the QCD ghost dark energy scenario. For a spatially flat FRW universe containing only the pressureless matter, we obtain the time evolution of the torsion scalar T (or the Hubble parameter). Then, we calculate the effective torsion equation of state parameter of the QCD ghost f(T)-gravity model as well as the deceleration parameter of the universe. Furthermore, we fit the model parameters by using the latest observational data including SNeIa, CMB and BAO data. We also check the viability of our model using a cosmographic analysis approach. Moreover, we investigate the validity of the generalized second law (GSL) of gravitational thermodynamics for our model. Finally, we point out the growth rate of matter density perturbation. We conclude that in QCD ghost f(T)-gravity model, the universe begins a matter dominated phase and approaches a de Sitter regime at late times, as expected. Also this model is consistent with current data, passes the cosmographic test, satisfies the GSL and fits the data of the growth factor well as the {Lambda}CDM model. (orig.)

  15. Fermionic ghosts in Moyal string field theory

    Science.gov (United States)

    Bars, Itzhak; Kishimoto, Isao; Matsuo, Yutaka

    2003-07-01

    We complete the construction of the Moyal star formulation of bosonic open string field theory (MSFT) by providing a detailed study of the fermionic ghost sector. In particular, as in the case of the matter sector, (1) we construct a map from Witten's star product to the Moyal product, (2) we propose a regularization scheme which is consistent with the matter sector and (3) as a check of the formalism, we derive the ghost Neumann coefficients algebraically directly from the Moyal product. The latter satisfy the Gross-Jevicki nonlinear relations even in the presence of the regulator, and when the regulator is removed they coincide numerically with the expression derived from conformal field theory. After this basic construction, we derive a regularized action of string field theory in the Siegel gauge and define the Feynman rules. We give explicitly the analytic expression of the off-shell four point function for tachyons, including the ghost contribution. Some of the results in this paper have already been used in our previous publications. This paper provides the technical details of the computations which were omitted there.

  16. Fermionic Ghosts in Moyal String Field Theory

    CERN Document Server

    Bars, Itzhak; Matsuo, Y

    2003-01-01

    We complete the construction of the Moyal star formulation of bosonic open string field theory (MSFT) by providing a detailed study of the fermionic ghost sector. In particular, as in the case of the matter sector, (1) we construct a map from Witten's star product to the Moyal product, (2) we propose a regularization scheme which is consistent with the matter sector and (3) as a check of the formalism, we derive the ghost Neumann coefficients algebraically directly from the Moyal product. The latter satisfy the Gross-Jevicki nonlinear relations even in the presence of the regulator, and when the regulator is removed they coincide numerically with the expression derived from conformal field theory. After this basic construction, we derive a regularized action of string field theory in the Siegel gauge and define the Feynman rules. We give explicitly the analytic expression of the off-shell four point function for tachyons, including the ghost contribution. Some of the results in this paper have already been us...

  17. Vertex operators of ghost number three in Type IIB supergravity

    Energy Technology Data Exchange (ETDEWEB)

    Mikhailov, Andrei, E-mail: andrei@ift.unesp.br

    2016-06-15

    We study the cohomology of the massless BRST complex of the Type IIB pure spinor superstring in flat space. In particular, we find that the cohomology at the ghost number three is nontrivial and transforms in the same representation of the supersymmetry algebra as the solutions of the linearized classical supergravity equations. Modulo some finite dimensional spaces, the ghost number three cohomology is the same as the ghost number two cohomology. We also comment on the difference between the naive and semi-relative cohomology, and the role of b-ghost.

  18. 76 FR 76812 - Requested Administrative Waiver of the Coastwise Trade Laws: Vessel BARBARY GHOST; Invitation for...

    Science.gov (United States)

    2011-12-08

    ... 0148] Requested Administrative Waiver of the Coastwise Trade Laws: Vessel BARBARY GHOST; Invitation for... the vessel BARBARY GHOST is: Intended Commercial Use Of Vessel: ``Sightseeing tours in the...

  19. Ghost Whisperer's Ghost in the Machine: An example of pop cultural representation of virtual worlds

    DEFF Research Database (Denmark)

    Reinhard, CarrieLynn D.

    2009-01-01

    Analysis of an episode of the CBS series "Ghost Whisperer" for how it depicts a) what is a virtual world and b) the tensions that are involved in discussing the uses and effects of a virtual world.  Discussion focuses on the overriding negative reception of virtual worlds in popular culture due t...

  20. Rule of oxygen transmission in dump leaching

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    According to the chemical equations, the flux and concentration of oxygen required during bacterial leaching sulfuric mineral were investigated; the rule of air bubble transmitted in granular was researched in the Dump Leaching Plant of Dexing Copper Mine. The results show that lack of oxygen in dump leaching is the critical factor of restricting leaching reaction. Pyrite is the primary oxygen-consuming mineral in bioleaching. When its content is too high, it needs a great deal of oxygen for reaction and competes for the finite oxygen with objective minerals, and thus the leaching velocity decreases greatly. The average size of ore particles and diameter of bubbles are the key parameters affecting the mass transfer coefficient. Reverse analysis was adopted, and it shows that 44.8 m3 air per unit ore can meet the requirement of production if the molar ratio of pyrite to chalcopyrite is 10.

  1. Visions of Inflation in World History: Ghost Story III

    Science.gov (United States)

    Niederjohn, M. Scott; Schug, Mark C.; Wood, William C.

    2013-01-01

    This article represents the third in a "ghost story" series by the same authors. Readers may recall that Mr. Bernanke was "visited" by the ghosts of Adam Smith and John Maynard Keynes in the March/April 2010 issue of "Social Education" as these two famous economists debated the economic recovery (see EJ878912). Mr.…

  2. At dumpe på FARMA

    DEFF Research Database (Denmark)

    Johannsen, Bjørn Friis

    Uddrag fra forord: "At dumpe på FARMA peger på flere centrale styrker i farmaceutuddannelsen. For det første at de studerende reelt er interesserede i farmaceutfaget når de optages på studiet, og de oplever velvilje fra underviserne. For det andet at studenterkulturen på studiet er stærk, således...

  3. Between social dumping and social protection

    DEFF Research Database (Denmark)

    Nielsen, Niels Jul; Sandberg, Marie

    2014-01-01

    In a world increasingly challenged by neoliberal restructurings of labour markets within the global economy, labour organisation is continuously challenged. Based on ethnographic fieldwork conducted among Polish construction workers in Denmark, both at their place of work and in their homes in De...... flexibility and availability, and that the composition of the migrant family significantly impacts how migratory practices are made feasible and desirable. Keywords: East-West migrants, labour mobility, social dumping, migrant families, ethnographic fieldwork...

  4. Does Anti-dumping Enforcement Generate Threat?

    OpenAIRE

    Bagchi, Sagnik; Bhattacharyya, Surajit; Narayanan, Krishnan

    2014-01-01

    The last two decades have witnessed that countries across the world are guided by the rules and regulations of multilateral trading institutions (for example, World Trade organization [WTO], International Monetary Fund [IMF]) in order to promote free and fair trade through gradual reduction in trade barriers. The World economy has noticed significant reduction in tariffs, yet we find a rise in non-tariff barriers (NTBs). However, we still find dumping and few other trade strategies of the exp...

  5. Heavy Flavour Cascade Production in a Beam Dump

    CERN Document Server

    2015-01-01

    SHiP will use a 400~GeV/c proton beam impinging on a several interaction length long Molybdenum target. Heavy flavour hadrons produced in the dump can decay semi-leptonically, which can produce both the Heavy Neutral Leptons as signal, but also potential background from muons and neutrinos. The absolute rate of heavy flavour production is taken from measurements. Pythia is used to predict the phase space distribution of the charm and beauty hadrons which are produced both in the primary interaction of the 400~GeV/c proton and in interactions of the secondaries produced in the cascade. The full cascade production of both HNL and background is compared to that reported in the SHiP Technical Proposal, where only the primary $pN$ interactions were taken into account.

  6. Collective deceleration: Toward a compact beam dump

    Directory of Open Access Journals (Sweden)

    H.-C. Wu

    2010-10-01

    Full Text Available With the increasing development of laser electron accelerators, electron energies beyond a GeV have been reached and higher values are expected in the near future. A conventional beam dump based on ionization or radiation loss mechanisms is cumbersome and costly, not to mention the radiological hazards. We revisit the stopping power theory of high-energy charged particles in matter and discuss the associated problem of beam dumping from the point of view of collective deceleration. The collective stopping length in an ionized gas can be several orders of magnitude shorter than that described by the Bethe-Bloch formulas and associated with multiple electromagnetic cascades in solids. At the same time, the tenuous density of the gas makes the radioactivation negligible. Such a compact beam dump without radioactivation works well for short and dense bunches, as they are typically generated from a laser wakefield accelerator. In addition, the nonuniform transverse wakefield can induce microbunching of the electron bunch by betatron oscillation. The microstructure could serve as a prebunched source for coherent radiation or feeding a free electron laser.

  7. Stirring with ghost rods in a lid-driven cavity

    Science.gov (United States)

    Kumar, Pankaj; Chen, Jie; Stremler, Mark

    2009-11-01

    It has shown that passive fluid particles moving on periodic orbits can be used to `stir' a viscous fluid in a two-dimensional lid-driven cavity that exhibits a figure-eight flow pattern (Stremler & Chen 2007). Fluid motion in the vicinity of these particles produces ``ghost rod'' structures that behave like semi-permeable rods in the flow. Since these ghost rods are present due to the system dynamics, perturbations in the boundary conditions lead to variations in the existence and structure of the ghost rods. We discuss these variations and assess the role of ghost rods in mixing over a range of operating conditions for this system. The results suggest that ghost rods can play an important role in mixing for other counter-rotating flows.

  8. Ghosts and matter couplings in massive gravity, bigravity and multigravity

    Science.gov (United States)

    de Rham, Claudia; Heisenberg, Lavinia; Ribeiro, Raquel H.

    2014-12-01

    Recently, several works have investigated the coupling to matter in ghost-free massive bigravity and multigravity and a new effective coupling to matter has been proposed. In this paper we clarify some confusion on the existence and the implications of a ghost above the strong coupling scale. We confirm that the standard constraint which is otherwise typically present in this type of theories disappears on generic backgrounds as soon as this new coupling is considered. This implies the reemergence of the Boulware-Deser ghost. Nevertheless the absence of ghost in the decoupling limit implies that the cutoff scale (if identified with the scale at which the ghost enters) is higher than the strong coupling scale. Therefore there is a valid interesting region of applicability for these couplings at scales below the cutoff.

  9. Ghosts & Matter Couplings in Massive (bi-&multi-)Gravity

    CERN Document Server

    de Rham, Claudia; Ribeiro, Raquel H

    2014-01-01

    Recently, several works have investigated the coupling to matter in ghost-free massive (bi-&multi-)gravity and a new effective coupling to matter has been proposed. In this note we clarify some confusion on the existence and the implications of a ghost above the strong coupling scale. We confirm that the standard constraint which is otherwise typically present in this type of theories disappears on generic backgrounds as soon as this new coupling is considered. This implies the re-emergence of the Boulware-Deser ghost. Nevertheless the absence of ghost in the decoupling limit implies that the cut-off scale (if identified with the scale at which the ghost enters) is higher than the strong coupling scale. Therefore there is a valid interesting region of applicability for these couplings at scales below the cut-off.

  10. A priori physicalism, lonely ghosts and Cartesian doubt.

    Science.gov (United States)

    Goff, Philip

    2012-06-01

    A zombie is a physical duplicates of a human being which lacks consciousness. A ghost is a phenomenal duplicate of a human being whose nature is exhausted by consciousness. Discussion of zombie arguments, that is anti-physicalist arguments which appeal to the conceivability of zombies, is familiar in the philosophy of mind literature, whilst ghostly arguments, that is, anti-physicalist arguments which appeal to the conceivability of ghosts, are somewhat neglected. In this paper I argue that ghostly arguments have a number of dialectical advantages over zombie arguments. I go onto explain how the conceivability of ghosts is inconsistent with two kinds of a priori physicalism: analytic functionalism and the Australian physicalism of Armstrong and Lewis.

  11. Plato's ghost the modernist transformation of mathematics

    CERN Document Server

    Gray, Jeremy

    2008-01-01

    Plato's Ghost is the first book to examine the development of mathematics from 1880 to 1920 as a modernist transformation similar to those in art, literature, and music. Jeremy Gray traces the growth of mathematical modernism from its roots in problem solving and theory to its interactions with physics, philosophy, theology, psychology, and ideas about real and artificial languages. He shows how mathematics was popularized, and explains how mathematical modernism not only gave expression to the work of mathematicians and the professional image they sought to create for themselves, but how modernism also introduced deeper and ultimately unanswerable questions

  12. Backscattering Differential Ghost Imaging in Turbid Media

    CERN Document Server

    Bina, M; Molteni, M; Gatti, A; Lugiato, L A; Ferri, F

    2012-01-01

    In this Letter we present experimental results concerning the retrieval of images of absorbing objects immersed in turbid media via differential ghost imaging (DGI) in a backscattering configuration. The method has been applied, for the first time to our knowledge, to the imaging of small thin black objects located at different depths inside a turbid solution of polystyrene nanospheres and its performances assessed via comparison with standard imaging techniques. A simple theoretical model capable of describing the basic optics of DGI in turbid media is proposed.

  13. Gluon and Ghost Dynamics from Lattice QCD

    CERN Document Server

    Oliveira, O; Dudal, D; Silva, P J

    2016-01-01

    The two point gluon and ghost correlation functions and the three gluon vertex are investigated, in the Landau gauge, using lattice simulations. For the two point functions, we discuss the approach to the continuum limit looking at the dependence on the lattice spacing and volume. The analytical structure of the propagators is also investigated by computing the corresponding spectral functions using an implementation of the Tikhonov regularisation to solve the integral equation. For the three point function we report results when the momentum of one of the gluon lines is set to zero and discuss its implications.

  14. Gluon and Ghost Dynamics from Lattice QCD

    Science.gov (United States)

    Oliveira, O.; Duarte, A. G.; Dudal, D.; Silva, P. J.

    2017-03-01

    The two point gluon and ghost correlation functions and the three gluon vertex are investigated, in the Landau gauge, using lattice simulations. For the two point functions, we discuss the approach to the continuum limit looking at the dependence on the lattice spacing and volume. The analytical structure of the propagators is also investigated by computing the corresponding spectral functions using an implementation of the Tikhonov regularisation to solve the integral equation. For the three point function we report results when the momentum of one of the gluon lines is set to zero and discuss its implications.

  15. 40 CFR 227.16 - Basis for determination of need for ocean dumping.

    Science.gov (United States)

    2010-07-01

    ... ocean dumping. 227.16 Section 227.16 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) OCEAN DUMPING CRITERIA FOR THE EVALUATION OF PERMIT APPLICATIONS FOR OCEAN DUMPING OF MATERIALS Need for Ocean Dumping § 227.16 Basis for determination of need for ocean dumping. (a) A need for...

  16. 40 CFR 228.15 - Dumping sites designated on a final basis.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Dumping sites designated on a final... DUMPING CRITERIA FOR THE MANAGEMENT OF DISPOSAL SITES FOR OCEAN DUMPING § 228.15 Dumping sites designated on a final basis. (a)(1) The sites identified in this section are approved for dumping the...

  17. Two-Photon Ghost Image and Interference-Diffraction

    Science.gov (United States)

    Shih, Y. H.; Sergienko, A. V.; Pittman, T. B.; Strekalov, D. V.; Klyshko, D. N.

    1996-01-01

    One of the most surprising consequences of quantum mechanics is entanglement of two or more distance particles. The two-particle entangled state was mathematically formulated by Schrodinger. Based on this unusual quantum behavior, EPR defined their 'physical reality' and then asked the question: 'Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?' One may not appreciate EPR's criterion of physical reality and insist that 'no elementary quantum phenomenon is a phenomenon until it is a recorded phenomenon'. Optical spontaneous parametric down conversion (SPDC) is the most effective mechanism to generate an EPR type entangled two-photon state. In SPDC, an optical beam, called the pump, is incident on a birefringent crystal. The pump is intense enough so that nonlinear effects lead to the conversion of pump photons into pairs of photons, historically called signal and idler. Technically, the SPDC is said to be type-1 or type-2, depending on whether the signal and idler beams have parallel or orthogonal polarization. The SPDC conversion efficiency is typically on the order of 10(exp -9) to 10(exp -11), depending on the SPDC nonlinear material. The signal and idler intensities are extremely low, only single photon detection devices can register them. The quantum entanglement nature of SPDC has been demonstrated in EPR-Bohm experiments and Bell's inequality measurements. The following two experiments were recently performed in our laboratory, which are more closely related to the original 1935 EPR gedankenezperiment. The first experiment is a two-photon optical imaging type experiment, which has been named 'ghost image' by the physics community. The signal and idler beams of SPDC are sent in different directions, so that the detection of the signal and idler photons can be performed by two distant photon counting detectors. An aperture object (mask) is placed in front of the signal photon detector and illuminated by the signal beam through a

  18. Dumping syndrome after esophageal atresia repair without antireflux surgery.

    Science.gov (United States)

    Michaud, Laurent; Sfeir, Rony; Couttenier, Frédéric; Turck, Dominique; Gottrand, Frédéric

    2010-04-01

    In childhood, the surgical treatment of gastroesophageal reflux is the main cause of dumping syndrome. We report the cases of 2 children with esophageal atresia who presented with dumping syndrome without any precipitating known factors, such as gastroesophageal reflux surgery or associated microgastria. Our data suggest (1) that dumping syndrome can occur after primary anastomosis of esophageal atresia without antireflux surgery and (2) that dumping syndrome should be considered in every child treated surgically for esophageal atresia presenting with digestive symptoms, malaise, failure to thrive, or refusal to eat.

  19. A look to nonlinear interacting Ghost dark energy cosmology

    Science.gov (United States)

    Khurshudyan, Martiros

    2016-07-01

    In this paper, we organize a look to nonlinear interacting Ghost dark energy cosmology involving a discussion on the thermodynamics of the Ghost dark energy, when the universe is bounded via the Hubble horizon. One of the ways to study a dark energy model, is to reconstruct thermodynamics of it. Ghost dark energy is one of the models of the dark energy which has an explicitly given energy density as a function of the Hubble parameter. There is an active discussion towards various cosmological scenarios, where the Ghost dark energy interacts with the pressureless cold dark matter (CDM). Recently, various models of the varying Ghost dark energy has been suggested, too. To have a comprehensive understanding of suggested models, we will discuss behavior of the cosmological parameters on parameter-redshift z plane. Some discussion on Om and statefinder hierarchy analysis of these models is presented. Moreover, up to our knowledge, suggested forms of interaction between the Ghost dark energy and cold dark matter (CDM) are new, therefore, within obtained results, we provide new contribution to previously discussed models available in the literature. Our study demonstrates that the forms of the interactions considered in the Ghost dark energy cosmology are not exotic and the justification of this is due to the recent observational data.

  20. Ghost-gluon and ghost-quark bound states and their role in BRST quartets

    CERN Document Server

    Alkofer, Natalia

    2011-01-01

    A non-perturbative version of the BRST quartet mechanism in infrared Landau gauge QCD is proposed for transverse gluons and quarks. Based on the positivity violation for transverse gluons the content of the respective non-perturbative BRST quartet is derived. To identify the gluon's BRST-daughter and second parent state, a truncated Bethe-Salpeter equation for the gluon-(anti-)ghost bound state is investigated. We comment shortly on several equivalent forms of this equation. Repeating the same construction for quarks leads to a truncated Bethe-Salpeter equation for a fundamentally charged quark-(anti-)ghost bound state. It turns out that a cardinal input to this equation is given by the fully dressed quark-gluon vertex, and that it is indispensable to dress the quark-gluon vertex in this equation in order to obtain a consistent truncation.

  1. Odontogenic ghost cell tumour with clear cell components: clear cell odontogenic ghost cell tumour?

    Science.gov (United States)

    Yoon, Jung Hoon; Ahn, Sang Gun; Kim, Su Gwan; Kim, Jin

    2004-07-01

    A case of odontogenic ghost cell tumour (OGCT) with clear cell components was encountered in the mandible of a 63-year-old man. The tumour revealed ameloblastomatous-type epithelial components accompanied by clusters of ghost cells and dentinoid juxtaposed to the odontogenic epithelium. In addition, some areas of the tumour tissue showed sheets and islands of clear, glycogen containing epithelial cells, which were separated by a thin fibrous connective tissue stroma. Both ameloblastic and clear cells exhibited positive immunoreactivities for cytokeratin 19 and AE1/3. It is not known whether this tumour represents a clear cell change of a pre-existing OGCT or a separate and distinct neoplasm derived de novo from the odontogenic epithelium. This tumour was given the term 'clear cell OGCT' because it captures the clear cell components, which is one of the most prominent distinguishing features of the tumour.

  2. Metric Formulation of Ghost-Free Multivielbein Theory

    CERN Document Server

    Hassan, S F; von Strauss, M

    2012-01-01

    We formulate the recently proposed ghost-free theory of multiple interacting vielbeins in terms of their corresponding metrics. This is achieved by reintroducing all local Lorentz invariances broken by the multivielbein interaction potential which, in turn, allows us to explicitly separate the gauge degrees of freedom in the vielbeins from the components of the metrics by an appropriate gauge choice. We argue that the gauge choice does not spoil the no-ghost proof of the multivielbein theory, hence the multimetric theory is ghost-free. We further show the on-shell equivalence of the metric and vielbein descriptions, first in general and thereafter in two illustrative examples.

  3. The Defects of WTO Anti-Dumping Rules and Related Reform

    Institute of Scientific and Technical Information of China (English)

    Xiao Wenhong

    2008-01-01

    @@ Since Canada made the first anti-dumping code in 1904, United States, Australia and France made their domestic anti-dumping codes successively.In 1947,the contracting parties made anti-dumping rules part of GATT (Article VI).

  4. 78 FR 60240 - Non-Application of Previously Withdrawn Regulatory Provisions Governing Targeted Dumping in...

    Science.gov (United States)

    2013-10-01

    ... Regulatory Provisions Governing Targeted Dumping in Antidumping Duty Investigations AGENCY: Import... implemented, the previously withdrawn regulatory provisions governing targeted dumping in antidumping duty... concerning the calculation of the weighted-average dumping margin and assessment rate in certain...

  5. Monitoring of dredged-dumped sediment dispersal off the Bay of the Seine (northern France) using environmental magnetism

    Science.gov (United States)

    Nizou, Jean; Demory, François; Dubrulle-Brunaud, Carole

    2016-07-01

    In this study, we developed a novel approach for fingerprinting dredged-dumped sediments at sea using magnetic susceptibility. Several magnetic measurements were performed on discrete sedimentary samples from the dredged areas in the Seine River and from the Bay of Seine seafloor before and after dumping. The dredged sediments showed higher susceptibility values than the undisturbed seafloor, which allowed the mapping of the dispersion of dredged-dumped sediments. In the vicinity of the coast and the estuary, high-susceptibility terrestrial input from rivers could also be mapped by this technique, therefore monitoring of the dumping by the susceptibility proxy is limited to the offshore areas. This susceptibility signal is controlled by the ferromagnetic fraction of the sediment. Furthermore, a constant magnetite-dominated magneto-mineralogy is observed in the study area. In addition to the susceptibility, a magnetic grain size parameter of the low-coercive fraction was also found to be sensitive to dumping. Both tracers showed an in progress resilience of the sedimentary environment during a 6-month survey.

  6. 7 CFR 48.4 - Destroying or dumping.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Destroying or dumping. 48.4 Section 48.4 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing... dumping. Any person receiving produce in interstate commerce or in the District of Columbia for or...

  7. 7 CFR 46.23 - Evidence of dumping.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Evidence of dumping. 46.23 Section 46.23 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing... Receivers § 46.23 Evidence of dumping. Reasonable cause for destroying any produce exists when the...

  8. Experimental study on explosive mechanism of spontaneous combustion gangue dump

    Institute of Scientific and Technical Information of China (English)

    PAN Rong-kun; YU Ming-gao; LU Lai-xiang

    2009-01-01

    In order to explore the reason for the frequency explosion of spontaneous combustion coal gangue dump and get to know their explosion mechanism, established the experiment platform about spontaneous combustion coal gangue dump interoperable water. The gangue dump was heated using the external heat source, and rainy weather through water mist was simulated. Simulated experiment about explosion of spontaneous combustion coal gangue dump was carried out on the different conditions of the rainfall or not. The unusual gases produced in the course of gangue combustion and the changes in temperature were observed, and their impacts on the explosion of gangue dump were analyzed. The experimental results show that overall warming phenomenon of the gangue dump after watering occurred, the amount of H2 iS three times than that before watering,and the amount of CO is far greater than that on the conditions of no-watering, at the same time combining with local observation and tests. It is found that the content of the oxygen reduce with the temperature increasing; however, gangue dump internal hydrogen content increase unusually on the rainfall conditions at 90 ℃, but the local measuring points reach the explosion limit. The existence of the CO and H2 iS the main reason for inducing the explosion of spontaneous combustion coal gangue dump.

  9. 7 CFR 58.212 - Hopper or dump room.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Hopper or dump room. 58.212 Section 58.212 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Standards....212 Hopper or dump room. A separate room shall be provided for the transfer of bulk dry dairy...

  10. 30 CFR 56.9301 - Dump site restraints.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Dump site restraints. 56.9301 Section 56.9301 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... § 56.9301 Dump site restraints. Berms, bumper blocks, safety hooks, or similar impeding devices...

  11. Argentina Imp Anti-dumping Duties on Tires from China

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    On June 22, Argentina made the final anti-dumping adjudication once tires from China; on July 6, the Argentina authorities released the No. 221 resolution in 2011 issued by the Ministry of Industry: Impose 23% anti-dumping duties off estate car tires, 10% on the tires of machinery or vehicles used for agriculture and forestation,

  12. Mercury in dumped blast furnace sludge.

    Science.gov (United States)

    Földi, Corinna; Dohrmann, Reiner; Mansfeldt, Tim

    2014-03-01

    Blast furnace sludge (BFS) is a waste generated in the production of pig iron and was dumped in sedimentation ponds. Sixty-five samples from seven BFS locations in Europe were investigated regarding the toxic element mercury (Hg) for the first time. The charge material of the blast furnace operations revealed Hg contents from 0.015 to 0.097mgkg(-1). In comparison, the Hg content of BFS varied between 0.006 and 20.8mgkg(-1) with a median of 1.63mgkg(-1), which indicates enrichment with Hg. For one site with a larger sample set (n=31), Hg showed a stronger correlation with the total non-calcareous carbon (C) including coke and graphite (r=0.695; n=31; p<0.001). It can be assumed that these C-rich compounds are hosting phases for Hg. The solubility of Hg was rather low and did not exceed 0.43% of total Hg. The correlation between the total Hg concentration and total amount of NH4NO3-soluble Hg was relatively poor (r=0.496; n=27; p=0.008) indicating varying hazard potentials of the different BFS. Finally, BFS is a mercury-containing waste and dumped BFS should be regarded as potentially mercury-contaminated sites.

  13. Fast Dump of the ATLAS Toroids

    CERN Document Server

    Dudarev, A; Volpini, Giovanni; Dudarev, Alexey; Kate, Herman Ten

    2010-01-01

    The toroidal magnet system of the ATLAS Detector at CERN consists of a Barrel Toroid (BT) and two End Cap Toroids (ECT-A and ECT-C). Each toroid is built up from eight racetrack coils wound with an aluminum stabilized NbTi conductor and indirectly cooled by forced flow liquid helium. The three toroids operate in series at 20.5 kA with a total stored energy of 1.5 GJ. In order to verify the reliability and effectiveness of the quench protection system, series of fast dump tests have been performed first of the single toroids and finally of the entire toroidal magnet system. In this paper a model to simulate the fast dump of the ATLAS toroids in single mode operation and in full system configuration is presented. The model is validated through comparison with measured data extracted from the ramp-and-quench runs. The calculated energy dissipation in the various coils is in very good agreement (within 1-2\\%) with the enthalpy changes estimated from the temperature measurements of the different parts of the cold ...

  14. Manufacturing prototypes for LIPAC beam dump

    Energy Technology Data Exchange (ETDEWEB)

    Arranz, F., E-mail: fernando.arranz@ciemat.es [CIEMAT, Madrid (Spain); Brañas, B.; Iglesias, D. [CIEMAT, Madrid (Spain); Nomen, O. [IREC, Barcelona (Spain); Rapisarda, D.; Lapeña, J.; Muñoz, A. [CIEMAT, Madrid (Spain); Szcepaniak, B. [GALVANO-T, Windeck (Germany); Manini, J. [CARMAN, Madrid (Spain); Gómez, J. [TRINOS VACUUM, Valencia (Spain)

    2014-10-15

    Highlights: •Electroforming of copper and electronbeam welding techniques are compared. •Mechanical properties of Cu–stainless steel joint by electroforming are presented. •Achieved manufacturing tolerances are shown. •The difficulties and solutions for the complicated manufacturing are explained. -- Abstract: The purpose of the research is to define the most adequate manufacturing process for the dump of a linear deuteron accelerator. The deuteron beam can be pulsed as well as continuous with energies up to 9 MeV. The maximum beam power is 1.12 MW corresponding to a beam current of 125 mA. The requirements on the surface on which the deuterons will be stopped are quite demanding and the length and slenderness of the cone poses a considerable difficulty in the manufacturing process. The design of the beam dump is based on a copper cone 2500 mm long, 300 mm aperture and 5 to 6.5 mm thickness. Basically only two technologies were found feasible for the manufacturing of the cone: Electroforming and Electron Beam Welding (EBW). The article shows the main results found when manufacturing different prototypes.

  15. Dentinogenic Ghost Cell Tumor of the Peripheral Variant Mimicking Epulis

    Directory of Open Access Journals (Sweden)

    Uddipan Kumar

    2010-01-01

    Full Text Available Dentinogenic ghost cell tumor (DGCT is an uncommon locally invasive odontogenic tumor regarded by many as a variant of calcifying odontogenic cyst. The peripheral variant of this clinical rarity appears as a well-circumscribed mass mimicking a nonspecific gingival enlargement. Microscopic appearance of odontogenic epithelium admixed with focal areas of dentinoid formation and sheets of ghost cells giving the definitive diagnosis of dentinogenic ghost cell tumor imply that microscopic examination is compulsory for any gingival mass. Van Gieson histochemical stain further confirmed the nature of dentinoid-like material. A complete workup of a case of peripheral dentinogenic ghost cell tumor is presented in this paper and the current concept as well as the appraisal of literature is presented.

  16. Ghost cell differentiation and calcification in ameloblastic fibroma.

    Science.gov (United States)

    Luo, Hai Yan; Gao, Yan

    2013-01-01

    Ghost cell differentiation within an ameloblastic fibroma is extremely rare. The ghost cells found in an ameloblastic fibroma in previously reported cases were all associated with a typical calcifying odontogenic cyst. Here, we report a case of an ameloblastic fibroma with focal ghost cells and calcifications in some neoplastic epithelial islands, but without other histologic manifestations consistent with a calcifying odontogenic cyst. The patient was a 13-year-old Chinese boy who presented with a bony-hard swelling in the posterior mandibular region over a 6-month period. Radiographs showed a well-defined multilocular radiolucency associated with an unerupted tooth. The lesion was mostly cystic-solid and comprised of odontogenic epithelial strands, islands and myxoid ectomesenchymal component microscopically. Small groups of ghost cells and calcification were noted in the epithelial islands.

  17. Ghost Structure and Closed Strings in Vacuum String Field Theory

    CERN Document Server

    Gaiotto, D; Sen, A; Zwiebach, B; Gaiotto, Davide; Rastelli, Leonardo; Sen, Ashoke; Zwiebach, Barton

    2001-01-01

    We complete the construction of vacuum string field theory by proposing a canonical choice of ghost kinetic term -- a local insertion of the ghost field at the string midpoint with an infinite normalization. This choice, supported by level expansion studies in the Siegel gauge, allows a simple analytic treatment of the ghost sector of the string field equations. As a result, solutions are just projectors, such as the sliver, of an auxiliary CFT built by combining the matter part with a twisted version of the ghost conformal theory. Level expansion experiments lead to surprising new projectors -- butterfly surface states, whose analytical expressions are obtained. With the help of a suitable open-closed string vertex we define open-string gauge invariant operators parametrized by on-shell closed string states. We use regulated vacuum string field theory to sketch how pure closed string amplitudes on surfaces without boundaries arise as correlators of such gauge invariant operators.

  18. Noise reduction in selective computational ghost imaging using genetic algorithm

    Science.gov (United States)

    Zafari, Mohammad; Ahmadi-Kandjani, Sohrab; Kheradmand, Reza

    2017-03-01

    Recently, we have presented a selective computational ghost imaging (SCGI) method as an advanced technique for enhancing the security level of the encrypted ghost images. In this paper, we propose a modified method to improve the ghost image quality reconstructed by SCGI technique. The method is based on background subtraction using genetic algorithm (GA) which eliminates background noise and gives background-free ghost images. Analyzing the universal image quality index by using experimental data proves the advantage of this modification method. In particular, the calculated value of the image quality index for modified SCGI over 4225 realization shows an 11 times improvement with respect to SCGI technique. This improvement is 20 times in comparison to conventional CGI technique.

  19. Ghosts, Vampires and Zombies: Cinema Fiction vs Physics Reality

    CERN Document Server

    Efthimiou, C J

    2006-01-01

    We examine certain features of popular myths regarding ghosts, vampires and zombies as they appear in film and folklore. We use physics to illuminate inconsistencies associated with these myths and to give practical explanation to certain aspects.

  20. Periodic nonlinearity resulting from ghost reflections in heterodyne interferometry

    Science.gov (United States)

    Wu, Chien-ming

    2003-01-01

    Periodic nonlinearity is a systematic error limiting the accuracy of displacement measurements at the nanometer level. It results from many causes such as frequency mixing, polarization mixing, polarization-frequency mixing, and ghost reflections. The purpose of this paper is to study the periodic nonlinearity resulting from ghost reflections, which has not been investigated before. A generalized scheme of interferometer, which is free of frequency and polarization mixings, is used in the study. This ensures that the residual periodic nonlinearity is from the ghost reflections only. In this paper, a general form of periodic nonlinearity and a model including two kinds of ghost reflections, one with the same frequency and the other with two frequencies, are presented. The model is verified by experimental results.

  1. Parallel and Streaming Generation of Ghost Data for Structured Grids

    Energy Technology Data Exchange (ETDEWEB)

    Isenburg, M; Lindstrom, P; Childs, H

    2008-04-15

    Parallel simulations decompose large domains into many blocks. A fundamental requirement for subsequent parallel analysis and visualization is the presence of ghost data that supplements each block with a layer of adjacent data elements from neighboring blocks. The standard approach for generating ghost data requires all blocks to be in memory at once. This becomes impractical when there are fewer processors - and thus less aggregate memory - available for analysis than for simulation. We describe an algorithm for generating ghost data for structured grids that uses many fewer processors than previously possible. Our algorithm stores as little as one block per processor in memory and can run on as few processors as are available (possibly just one). The key idea is to slightly change the size of the original blocks by declaring parts of them to be ghost data, and by later padding adjacent blocks with this data.

  2. Biofertilizers for the revegetation of coal overburden dumps top materials

    Energy Technology Data Exchange (ETDEWEB)

    Nikhil, K. [Central Mining Research Institute, Dhanbad (India). Environmental Management Group

    2001-07-01

    Adding and improving nutrient status of overburden dump top material through biofertilizer for supporting vegetation and for sustainable spoil development, a pot experiment was conducted. In this, two bio-fertilizers namely bactin and phosphin in three doses were applied on overburden dump top material kept in pots growing two grass species. The growths were compared with control on dump and soil both. Results shows that overburden dump amended with bio-fertilizer at lowest dose have significant increase in growth over the control of dump material and soil in vetiver grass but failed to shows the same result in lemon grass. This may be due to different growth behaviour of the grasses. 14 refs., 2 tabs.

  3. The effect of somatostatin in dumping syndrome after gastric surgery.

    Science.gov (United States)

    Tulassay, Z; Tulassay, T; Gupta, R; Tamás, G

    1993-01-01

    The effect of somatostatin on early and late dumping syndrome was studied in 12 patients with gastric resection. Each patient underwent two glucose challenges with 75 gram of glucose administered orally. In the control study isotonic sodium chloride was given, while in the other study cyclic somatostatin in a dose of 80 ng/kg/min was given for a period of 270 minutes. In the control study all patients showed subjective symptoms of the early dumping syndrome with significant (p dumping syndrome associated with a significant (p dumping syndrome partly by inhibiting the vasoactive intestinal polypeptide, gastric inhibitory peptide and insulin release, which are increased in dumping syndrome and may, therefore, be implicated as to have an etiological role.

  4. Resolution and noise in ghost imaging with classical thermal light

    Institute of Scientific and Technical Information of China (English)

    Cheng Jing; Han Shen-Sheng; Yan Yi-Jing

    2006-01-01

    The resolution and classical noise in ghost imaging with a classical thermal light are investigated theoretically. For ghost imaging with a Gaussian Schell model source, the dependences of the resolution and noise on the spatial coherence of the source and the aperture in the imaging system are discussed and demonstrated by using numerical simulations.The results show that an incoherent source and a large aperture will lead to a good image quality and small noise.

  5. Zimbabwean mine dumps and their impacts on river water quality a reconnaissance study

    Science.gov (United States)

    Meck, Maideyi; Love, David; Mapani, Benjamin

    Zimbabwe has a substantial number of mines and 67 minerals have been mined in the country since 1900 but at present only 30 different minerals are being mined. Exploitation of a variety of ores, in rocks of diverse composition, provides the potential for a range of pollution problems. The severity and extent of contamination differs with the type of minerals mined. This paper presents part of the results of a broad study, carried out across Zimbabwe, which assessed the potential of different mine tailings dumps to cause environmental problems. The dumps considered in the study were divided into six dump types, namely: gold-mine dumps, base-metal mine dumps (dumps associated with the mining of nickel, zinc, copper and lead), minor-metals mine dumps (dumps associated with mining of antimony, arsenic, and selenium), platinum-group metal mine dumps, chromite and asbestos mine dumps, and sulphur (pyrite) mine dumps. The elemental chemistry of the dumps and physical characteristics (pH, total dissolved solids) of the dumps, tailings’ leachates, and stream waters around the dumps were used to assess the potential of the dumps to pollute water bodies. Samples were collected in both the dry and wet seasons. The dispersion and pollution patterns were derived from Eh-pH conditions around the dumps after considering the mobility of the elements present in these dumps under different Eh-pH conditions. In this paper potential to pollute is considered as the likelihood of the elements to disperse under the prevailing conditions at the dump. The concentrations of elements, type of elements and the potential dispersion and pollution patterns from each dump were used to characterise potential risk of water pollution associated with the different dump types. The results showed a slight increase in concentrations of most elements studied in downstream waters compared to upstream waters. The dump conditions varied from acidic to alkaline, and so the elements studied have different

  6. Reflective ghost imaging with classical Gaussian-state light

    Institute of Scientific and Technical Information of China (English)

    Deyang Duan; Yunjie Xia

    2012-01-01

    In this letter, we use quantum description and the Gaussian state to study reflective ghost imaging with two classical sources, and to provide their expressions. We find that the reflective ghost imaging of a rough-surfaced object, using Gaussian-state phase-insensitive or classically correlated phase-sensitive light, can be expressed in terms of the phase-insensitive or phase-sensitive cross-correlations between the two detected fields, including a background term. Moreover, reflective ghost imaging with two classical Gaussian-state lights is shown to have similar features as spatial resolution and field of view.%In this letter,we use quantum description and the Gaussian state to study reflective ghost imaging with two classical sources,and to provide their expressions.We find that the reflective ghost imaging of a rough-surfaced object,using Gaussian-state phase-insensitive or classically correlated phase-sensitive light,can be expressed in terms of the phase-insensitive or phase-sensitive cross-correlations between the two detected fields,including a background term.Moreover,reflective ghost imaging with two classical Gaussian-state lights is shown to have similar features as spatial resolution and field of view.

  7. Publication ethics and the ghost management of medical publication.

    Science.gov (United States)

    Sismondo, Sergio; Doucet, Mathieu

    2010-07-01

    It is by now no secret that some scientific articles are ghost authored - that is, written by someone other than the person whose name appears at the top of the article. Ghost authorship, however, is only one sort of ghosting. In this article, we present evidence that pharmaceutical companies engage in the ghost management of the scientific literature, by controlling or shaping several crucial steps in the research, writing, and publication of scientific articles. Ghost management allows the pharmaceutical industry to shape the literature in ways that serve its interests. This article aims to reinforce and expand publication ethics as an important area of concern for bioethics. Since ghost-managed research is primarily undertaken in the interests of marketing, large quantities of medical research violate not just publication norms but also research ethics. Much of this research involves human subjects, and yet is performed not primarily to increase knowledge for broad human benefit, but to disseminate results in the service of profits. Those who sponsor, manage, conduct, and publish such research therefore behave unethically, since they put patients at risk without justification. This leads us to a strong conclusion: if medical journals want to ensure that the research they publish is ethically sound, they should not publish articles that are commercially sponsored.

  8. Haunted manuscripts: ghost authorship in the medical literature.

    Science.gov (United States)

    Ngai, Stephanie; Gold, Jennifer L; Gill, Sudeep S; Rochon, Paula A

    2005-01-01

    Ghost authorship occurs when an individual who contributed substantially to a manuscript is not named in the byline or acknowledgments. Ghost authors may be employed by industry to prepare clinical trial results for publication. An expert is then "hired" as author so as to lend an air of credibility and neutrality to the manuscript. Ghost authorship is difficult to detect, and most articles that have been identified as ghostwritten were revealed as such only after investigative work by lawyers, journalists, or scientists. Ghost authorship is ethically questionable in that it may be used to mask conflicts of interest with industry. As it has been demonstrated that industry sponsorship of clinical trials may be associated with outcomes favorable to industry, this is problematic. Evidence-based medicine requires that clinical decisions be based on empirical evidence published in peer-reviewed medical journals. If physicians base their decisions on dubious research data, this can have negative consequences for patients. Ghost authorship also compromises academic integrity. A "film credit" concept of authority is one solution to the problems posed by ghost authorship. Other approaches have been taken by the United Kingdom and Denmark. A solution is necessary, as the relationship between authorship and accountability must be maintained.

  9. Dumping syndrome following gastric bypass: validation of the dumping symptom rating scale.

    Science.gov (United States)

    Laurenius, Anna; Olbers, Torsten; Näslund, Ingmar; Karlsson, Jan

    2013-06-01

    There is a lack of prevalent data for dumping syndrome (DS) and methods discriminating between different symptoms of the DS. A self-assessment questionnaire, the Dumping Symptom Rating Scale (DSRS), was developed. The aim was to measure the severity and frequency of nine dumping symptoms and to evaluate the construct validity of the DSRS. Pre- and 1 and 2 years after Roux-en-Y gastric bypass surgery, 47 adults and 82 adolescents completed the DSRS. Cognitive interview was performed. Reliability and construct validity were tested. Effect sizes (ES) of changes were calculated. Patients found the questionnaire relevant. A high proportion of the respondents reported no symptoms affecting them negatively at all (floor effects). However, 12 % stated, quite severe, severe, or very severe problems regarding fatigue after meal and half of them were so tired that they needed to lie down. Nearly 7 % reported quite severe, severe, or very severe problems dominated by nausea and 6 % dominated by fainting esteem. The internal consistency reliability was adequate for both severity (0.81-0.86) and frequency (0.76-0.84) scales. ES were small, since some subjects experienced symptoms already preoperatively. Although most patients reported no or mild dumping symptoms 1 and 2 years after gastric bypass surgery, around 12 % had persistent symptoms, in particular, postprandial fatigue, and needed to lie down. Another 7 % had problems with nausea and 6 % had problems with fainting esteem. The DSRS is a reliable screening tool to identify these patients.

  10. Was Mono Lake a 14C dump?

    Science.gov (United States)

    Maggs, William Ward

    This is a scientific story without an explanation, called a “mystery” and an “enigma” in articles by the people who discovered it. Confounded by evidence they cannot explain by natural processes, these scientists implicate human beings.One month ago in Eos, (June 7, 1988, p. 633), Wallace Broecker and Scott Stine reported abnormally high levels of radiogenic 14C in California's Mono Lake, now a National Historic Site. The only logical explanation, they proposed, is that someone secretly dumped a total of about 20 curies of 14C into the lake in two doses, sometime between 1952 and 1958 and again between 1966 and 1977. Broecker and Stine, geologists at Lamont-Doherty Geological Observatory in Palisades, N.Y., called on readers for information on the source of the 14C.

  11. Efflux of RNA from resealed nuclear envelope ghosts.

    Science.gov (United States)

    Prochnow, D; Thomson, M; Schröder, H C; Müller, W E; Agutter, P S

    1994-08-01

    mRNA translocation across the nuclear envelope and the appropriate signal-receptor interactions have been studied using resealed rat liver nuclear envelope ghosts (RNEG). We compared export kinetics of nonadenylated (tRNAs, histone-2 poly(A)- mRNA), and adenylated RNAs (poly(A)+ tRNAs, synthetic histone-2 poly(A) +mRNA, albumin mRNA, beta-globin poly(A) +mRNA and a total poly(A) + mRNA extract from rat liver cells). ATP-dependent export of mRNAs and of total poly(A)+ RNA was prevented by inhibitors of a nuclear envelope NTPase. All adenylated RNA species competed with each other for export, but nonadenylated RNAs did not. This indicates the existence of different translocation mechanisms for different RNA species with their appropriate nuclear envelope associated RNA receptors involved in export. The attachment of a poly(A)250 sequence at the 3'-end of tRNA or histone messenger masks the intrinsic RNA export signal of nonadenylated RNAs and results in efflux comparable to that of beta-globin poly(A)+ mRNA. The attachment on oligo(A)5 does not have any comparable effect of nonadenylated RNA translocation. Export of all polyadenylated RNAs from RNEGs is blocked by a monoclonal antibody, which is directed against an intranuclear envelope poly(A) binding protein. The results suggest that the pore complexes do not select RNAs for export to the cytoplasm and are therefore not responsible for nuclear restriction of mRNA precursors.

  12. Elasticity of substitution and anti-dumping decisions

    DEFF Research Database (Denmark)

    Hansen, Jørgen Drud; Meinen, Philipp; Nielsen, Jørgen Ulff-Møller

    2014-01-01

    Motivated by a monopolistic competition model with market segmentation and international price discrimination, this paper analyzes whether there is an inverse relation between the elasticity of substitution and final ad valorem anti-dumping duties across products. We test this for 19 countries...... using data on anti-dumping from the Global Antidumping Database and US data at the 6-digit HS product level for the elasticity of substitution from Broda and Weinstein (Q J Econ 121(2):541–585, 2006). The results in our empirical investigation support a negative relation between the elasticity...... of substitution and the final ad valorem anti-dumping duties....

  13. Technical and Biological Reclamation of the Topolnica Tailing Dump

    OpenAIRE

    Dambov, Risto; Spasovski, Orce

    2009-01-01

    Flotation waste is disposed of into a canyon type of dump. Discharge has been done in layers for more than twenty-five years that has led to the present state of the tailing dump. Flotation of copper ore is one of the production process in the Buchim Copper Mine which seriously disturbs the surrounding land. The drastic disturbance has severely changed the chemical and physical properties of the dump which entails the need for reclamation of the newly created surrounding. Technical and biolog...

  14. [Prevalence of early and late dumping after gastric bypass].

    Science.gov (United States)

    Héraïef, R; Giusti, V

    2014-03-26

    Gastric bypass surgery is an effective treatment of obesity, bringing a significant weight loss and a major improvement of carbohydrate profile. However, in some patients, a deregulation in carbohydrate metabolism between insulin secretion and sensitivity is observed, whereupon early and late dumping happen. Their prevalence isn't well studied, although it seems that 10 to 20% of patients are affected. We've studied a cohort of 70 patients who undergone gastric bypass surgery at the CHUV. 18 (25.7%) patients have a positive anamnesis for early dumping and 10 (14.3%) for late dumping, being it superior as what is described in the literature.

  15. Challenges and plans for injection and beam dump

    CERN Document Server

    Barnes, M; Mertens, V; Uythoven, J

    2015-01-01

    The injection and beam dumping systems of the LHC will need to be upgraded to comply with the requirements of operation with the HL-LHC beams. The elements of the injection system concerned are the fixed and movable absorbers which protect the LHC in case of an injection kicker error and the injection kickers themselves. The beam dumping system elements under study are the absorbers which protect the aperture in case of an asynchronous beam dump and the beam absorber block. The operational limits of these elements and the new developments in the context of the HL-LHC project are described.

  16. SPIDER beam dump as diagnostic of the particle beam

    Science.gov (United States)

    Zaupa, M.; Dalla Palma, M.; Sartori, E.; Brombin, M.; Pasqualotto, R.

    2016-11-01

    The beam power produced by the negative ion source for the production of ion of deuterium extracted from RF plasma is mainly absorbed by the beam dump component which has been designed also for measuring the temperatures on the dumping panels for beam diagnostics. A finite element code has been developed to characterize, by thermo-hydraulic analysis, the sensitivity of the beam dump to the different beam parameters. The results prove the capability of diagnosing the beam divergence and the horizontal misalignment, while the entity of the halo fraction appears hardly detectable without considering the other foreseen diagnostics like tomography and beam emission spectroscopy.

  17. SPIDER beam dump as diagnostic of the particle beam

    Energy Technology Data Exchange (ETDEWEB)

    Zaupa, M., E-mail: matteo.zaupa@igi.cnr.it; Sartori, E. [Università degli Studi di Padova, Via 8 Febbraio 2, Padova 35122 (Italy); Consorzio RFX, Corso Stati Uniti 4, Padova 35127 (Italy); Dalla Palma, M.; Brombin, M.; Pasqualotto, R. [Consorzio RFX, Corso Stati Uniti 4, Padova 35127 (Italy)

    2016-11-15

    The beam power produced by the negative ion source for the production of ion of deuterium extracted from RF plasma is mainly absorbed by the beam dump component which has been designed also for measuring the temperatures on the dumping panels for beam diagnostics. A finite element code has been developed to characterize, by thermo-hydraulic analysis, the sensitivity of the beam dump to the different beam parameters. The results prove the capability of diagnosing the beam divergence and the horizontal misalignment, while the entity of the halo fraction appears hardly detectable without considering the other foreseen diagnostics like tomography and beam emission spectroscopy.

  18. 30 CFR 56.9303 - Construction of ramps and dumping facilities.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Construction of ramps and dumping facilities... Loading, Hauling, and Dumping Safety Devices, Provisions, and Procedures for Roadways, Railroads, and Loading and Dumping Sites § 56.9303 Construction of ramps and dumping facilities. Ramps and...

  19. Selective Preservation of Fossil Ghost Fish

    Science.gov (United States)

    Meacham, Amanda

    2016-04-01

    A unique type of fossil fish preservation has been discovered in the Angelo Member (Fossil Lake) of the Green River Formation. The Angelo Member is a predominately evaporative deposit dominated by dolomite, but contains facies of fossiliferous laminated calcimicrite. Fossil fish occurring in two beds conspicuously lack bones. Fish in the lower bed are only preserved as organic material, including skin, pigments, and eyes. Fish in the upper bed have three-dimensional etching where bones once existed but also contain skin, pigments, and eyes. The top third of the upper bed often contains calcite crystals that are pseudomorphs after trona and possibly halite. Preliminary mineralogical analysis and mapping of evaporate facies suggests that this unique preservation may be related to lake geochemical conditions, such as high pH and alkalinity. To our knowledge, this is the first time this type of preservation has been observed and studied. Fossils and sediments within these beds are being studied both vertically and laterally through the one-meter thick sequence containing the fossil fish using XRD, isotopic, SEM, thin section, and total organic carbon analysis. Nine quarries, 0.5-1 meter square, were excavated for both fossils and rock samples along with 17 additional rock sample locations across an approximately 25-kilometer square region. This investigation has the capability of reconstructing the paleoenvironment and lake chemistry of Fossil Lake during the deposition of the "ghost-fish" beds and solving the mystery of the "missing bones" and the unusual process of preservation.

  20. Ghost suppression in image restoration filtering

    Science.gov (United States)

    Riemer, T. E.; Mcgillem, C. D.

    1975-01-01

    An optimum image restoration filter is described in which provision is made to constrain the spatial extent of the restoration function, the noise level of the filter output and the rate of falloff of the composite system point-spread away from the origin. Experimental results show that sidelobes on the composite system point-spread function produce ghosts in the restored image near discontinuities in intensity level. By redetermining the filter using a penalty function that is zero over the main lobe of the composite point-spread function of the optimum filter and nonzero where the point-spread function departs from a smoothly decaying function in the sidelobe region, a great reduction in sidelobe level is obtained. Almost no loss in resolving power of the composite system results from this procedure. By iteratively carrying out the same procedure even further reductions in sidelobe level are obtained. Examples of original and iterated restoration functions are shown along with their effects on a test image.

  1. FRW Cosmology in Ghost Free Massive Gravity

    CERN Document Server

    Comelli, D; Nesti, F; Pilo, L

    2011-01-01

    We study FRW homogeneous cosmological solutions in the recently found ghost free massive gravity. In previous works it was shown that when the additional extra metric, needed to generate the mass term, is taken as non-dynamical and flat, no homogeneous FRW cosmology exists. We show that, when the additional metric is a dynamical field, a perfectly safe FRW universe exists. FRW solutions fall in two branches. In the first branch the massive deformation is equivalent to an effectively generated cosmological constant whose scale is determined by the graviton mass. The second branch is quite rich: we have FRW cosmology in the presence of a "gravitational" fluid. The control parameter xi is the ratio of the two conformal factors. When xi is large, generically the cosmological evolution greatly differs from GR at the early time. In the small xi region, the evolution is similar to GR and the universe flows at late time toward an attractor represented by a dS phase.

  2. Database Dump - fRNAdb | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available List Contact us fRNAdb Database Dump Data detail Data name Database Dump DOI 10.18908/lsdba.nbdc00452-002 De...scription of data contents Dump data from database in the original site: - fRNAdb.pdf: description of database... schema - fRNAdb_schema.sql: database schema - fRNAdb_table.7z: dump data (original) - fRNAdbtsv.zip: dump... data (tab separeted text) Data file File name: Database_Dump File URL: ftp://ftp....biosciencedbc.jp/archive/frnadb/LATEST/Database_Dump File size: 673 MB Simple search URL - Data acquisition

  3. Robust EPI Nyquist Ghost Elimination via Spatial and Temporal Encoding (EPI-GESTE)

    OpenAIRE

    Hoge, W. Scott; Tan, Huan; Kraft, Robert A.

    2010-01-01

    Nyquist ghosts are an inherent artifact in EPI acquisitions. An approach to robustly eliminate Nyquist ghosts is presented that integrates two previous Nyquist ghost correction techniques: temporal domain encoding (Phase Labeling for Additional Coordinate Encoding: PLACE) and spatial domain encoding (Phased Array Ghost Elimination: PAGE). Temporal encoding modulates the EPI acquisition trajectory from frame to frame, enabling one to interleave data to remove inconsistencies that occur between...

  4. CBP Active Dumping and Active Countervailing (AD/CVD) Cases

    Data.gov (United States)

    Department of Homeland Security — The datasets provide information from CBP's reference files on active anti-dumping and active countervailing cases. This data includes associated case numbers (if...

  5. Continuous Wheel Momentum Dumping Using Magnetic Torquers and Thrusters

    Science.gov (United States)

    Oh, Hwa-Suk; Choi, Wan-Sik; Eun, Jong-Won

    1996-12-01

    Two momentum management schemes using magnetic torquers and thrusters are sug-gested. The stability of the momentum dumping logic is proved at a general attitude equilibrium. Both momentum dumping control laws are implemented with Pulse-Width- Pulse-Frequency Modulated on-off control, and shown working equally well with the original continuous and variable strength control law. Thrusters are assummed to be asymmetrically configured as a contingency case. Each thruster is fired following separated control laws rather than paired thrusting. Null torque thrusting control is added on the thrust control calculated from the momentum control law for the gener-ation of positive thrusting force. Both magnetic and thrusting control laws guarantee the momentum dumping, however, the wheel inner loop control is needed for the "wheel speed" dumping, The control laws are simulated on the KOrea Multi-Purpose SATellite (KOMPSAT) model.

  6. Solid waste dumping site suitability analysis using geographic ...

    African Journals Online (AJOL)

    ... system (GIS) and remote sensing for Bahir Dar Town, North Western Ethiopia. ... African Journal of Environmental Science and Technology ... Solid waste dumping is a serious problem in the urban areas because most solid wastes are not ...

  7. Dumping syndrome, a cause of acquired glycogenic hepatopathy.

    Science.gov (United States)

    Resnick, Jeffrey M; Zador, Ivan; Fish, Daryl L

    2011-01-01

    A 2-year-old boy, having undergone fundoplication for gastroesophageal reflux disease and fed by gastrostomy, presented with recurrent emesis, syncope with hypoglycemia, and persistently elevated serum liver transaminase levels. Liver biopsy revealed hepatocellular glycogenosis by light and electron microscopy. Further evaluation showed no evidence of diabetes mellitus, glycogen storage disease, or corticosteroid use. Since the hyperglycemic-hyperinsulinemic state of dumping syndrome would provide a mechanism for hepatocellular glycogenosis, the biopsy findings prompted consideration of dumping syndrome. Metabolic evaluation confirmed the diagnosis of dumping syndrome, and appropriate dietary management led to sustained resolution of symptomatology and hypertransaminasemia. Dumping syndrome is proposed to be a cause of hepatocellular glycogenosis, the latter representing a form of acquired glycogenic hepatopathy.

  8. Numerical analysis of rainfall effects in external overburden dump

    Institute of Scientific and Technical Information of China (English)

    Radhakanta Koner⇑; Debashish Chakravarty

    2016-01-01

    The effect of slope angle for external overburden dump in response to average and heavy rainfall has been analyzed using a two dimensional finite difference method of transient water flow through unsaturated–saturated soil. The external dump stability is evaluated for five geomaterial types on the basis of globally accepted safety factor analysis technique, based on shear strength reduction approach using finite differ-ence method. The results obtained from the finite difference method of analysis indicate that the external dump with more than 30? slope angle is greatly influenced by the rainfall under the studied conditions for geomaterial 3, 4 and 5, whereas dumps with geomaterial 1 and 2 remain safe. The analysis shows that major slope failure is out of preview for the studied rainfall conditions.

  9. The evidence of toxic wastes dumping in Campania, Italy.

    Science.gov (United States)

    Marfe, Gabriella; Di Stefano, Carla

    2016-09-01

    The region of Campania (particularly Naples and Caserta) were subjected to extensive illegal dumping operations of toxic and radioactive wastes since the 1980s. The highly toxic wastes (HTW) dumping operations that have taken place both along the coast and the hinterland, have extremely adverse effects on health, livelihoods and the future prospect of sustainable development of the local population. The toxic wastes dumping in Campania is real and it has compromised (irreversibly) the human health, natural environment, food security and the long-term development prospects of the affected population. To reverse this tragic trend, it is necessery the identification, isolation and reclamation of the polluted sites and full assessment of the nature and the scale of the polluting chemicals and other hazardous wastes. The purpose of this review is to contribute significantly to the available evidence of the long-running toxic waste dumping in Campania and its negative impact on the health of population.

  10. Dump system concepts for the Future Circular Collider

    CERN Document Server

    Bartmann, Wolfgang; Barnes, Mike; Borburgh, Jan; Burkart, Florian; Goddard, Brennan; Kramer, Thomas; Lechner, Anton; Sanz Ull, Alejandro; Schmidt, Rudiger; Stoel, Linda; Ostojic, Ranko; Rodziewicz, Janusz Pawel; van Trappen, Pieter; Barna, Dani

    2017-01-01

    The Future Circular Collider (FCC-hh) beam dump system must provide a safe and reliable extraction and dilution of the stored beam onto a dump absorber. Energy deposition studies show that damage limits of presently used absorber materials will already be reached for single bunches at 50 TeV. A fast field rise of the extraction kicker is required in order to sufficiently separate swept single bunches on the extraction protection absorbers in case of an asynchronous beam dump. In line with this demand is the proposal of a highly segmented extraction kicker system which allows for accepting a single kicker switch erratic and thus, significantly reduces the probability of an asynchronous beam dump. Superconducting septa are foreseen to limit the overall system length and power consumption. Two extraction system concepts are presented and evaluated regarding overall system length, energy deposition on absorbers, hardware requirements, radiation issues, and layout flexibility.

  11. LHC beam dumping system Extraction channel layout and acceptance

    CERN Document Server

    Goddard, B; Uythoven, J; Veness, R; Weterings, W

    2003-01-01

    The LHC beam dumping system must safely abort the LHC beams under all conditions, including those resulting from abnormal behaviour of machine elements or subsystems of the beam dumping system itself. The extraction channels must provide sufficient aperture both for the circulating and extracted beams, over the whole energy range and under various beam parameters. These requirements impose tight constraints on the tolerances of various extraction channel components, and also on the allowed range of beam positions in the region of these components. Operation of the beam dumping system under various fault states has been considered, and the resulting apertures calculated. After describing briefly the beam dumping system and the extraction channel geometry, the various assumptions made in the analysis are presented, before deriving tolerance limits for the relevant equipment and beam parameters.

  12. MACROMYCETES OF DUMPING SITES AS BIOINDICATORS OF ANTHROPOGENIC EDAPHOTOP STATUS

    Directory of Open Access Journals (Sweden)

    Popovych V.V.

    2012-12-01

    Full Text Available We studied the development of the macromycetes on anthropogenic edaphotop of dumping sites in western wooden-steppes of Ukraine. We considered principal ecological factors, namely acidity, temperature, and connectivity of edaphotop; humidity, temperature, and air humidity, atmospheric pressure, wind speed, equivalent dose of ionizing radiation in the surface ground of macromycetes habitats. The species diversity of macromycetes in dumping sites of western wooden-steppes of Ukraine was considerably low (Simpson index: 0,91; Shannon index: -1,9. Species evenness was calculated by indices of Simpson and Shannon was rather low: 0,43 and -2,71 correspondingly; this indicated limited development of fungi. The main factors were violation of natural environment of macromycetes biotopes and anthropogenic pressure on their development as a result of aerobic and anaerobic processes that occur within the dumping sites. We founded that macromycetes could be bioindicators of the anthropogenic edaphotop of the dumping sites.

  13. TCDQ-TCT retraction and losses during asynchronous beam dump

    CERN Document Server

    Bracco, Chiara; Quaranta, Elena; CERN. Geneva. ATS Department

    2016-01-01

    The protection provided by the TCDQs in case of asynchronous beam dump depends strongly on their correct setup. They have to respect the strict hierarchy of the full collimation system and shield the tertiary collimators in the experimental regions. This MD aimed at performing asynchronous beam dump tests with different configurations, in order to assess the minimum allowed retraction between TCTs and TCDQs and, as a consequence, on the The protection provided by the TCDQs in case of asynchronous beam dump depends strongly on their correct setup. They have to respect the strict hierarchy of the full collimation system and shield the tertiary collimators in the experimental regions. This MD aimed at performing asynchronous beam dump tests with different configurations, in order to assess the minimum allowed retraction between TCTs and TCDQs and, as a consequence, on the β* reach.

  14. Results from the LHC Beam Dump Reliability Run

    CERN Document Server

    Uythoven, J; Carlier, E; Castronuovo, F; Ducimetière, L; Gallet, E; Goddard, B; Magnin, N; Verhagen, H

    2008-01-01

    The LHC Beam Dumping System is one of the vital elements of the LHC Machine Protection System and has to operate reliably every time a beam dump request is made. Detailed dependability calculations have been made, resulting in expected rates for the different system failure modes. A 'reliability run' of the whole system, installed in its final configuration in the LHC, has been made to discover infant mortality problems and to compare the occurrence of the measured failure modes with their calculations.

  15. Pricing aspect of valuable metals from tailing dumps

    OpenAIRE

    Bugarin, Mile; Slavković, Gordana; Marinković, Vladan

    2011-01-01

    The last decade is characterized with the trend of higher prices of ferrous and precious metals on the world markets. Copper, gold and silver have been produced for centuries in the Bor mining complex. Flotation tailing dumps were created by copper mining and processing with tested contents of valuable metals. Tailing dumps with significant content of metals can be exploitated and useful raw materials can be evaluated. This paper discusses the pricing aspect of these raw materials or price mo...

  16. MACROMYCETES OF DUMPING SITES AS BIOINDICATORS OF ANTHROPOGENIC EDAPHOTOP STATUS

    OpenAIRE

    Popovych V.V.

    2012-01-01

    We studied the development of the macromycetes on anthropogenic edaphotop of dumping sites in western wooden-steppes of Ukraine. We considered principal ecological factors, namely acidity, temperature, and connectivity of edaphotop; humidity, temperature, and air humidity, atmospheric pressure, wind speed, equivalent dose of ionizing radiation in the surface ground of macromycetes habitats. The species diversity of macromycetes in dumping sites of western wooden-steppes of Ukraine was conside...

  17. Pathophysiology, diagnosis and management of postoperative dumping syndrome.

    Science.gov (United States)

    Tack, Jan; Arts, Joris; Caenepeel, Philip; De Wulf, Dominiek; Bisschops, Raf

    2009-10-01

    Dumping syndrome is a frequent complication of esophageal, gastric or bariatric surgery. Rapid gastric emptying, with the delivery to the small intestine of a significant proportion of solid food as large particles that are difficult to digest, is a key event in the pathogenesis of this syndrome. This occurrence causes a shift of fluid from the intravascular component to the intestinal lumen, which results in cardiovascular symptoms, release of several gastrointestinal and pancreatic hormones and late postprandial hypoglycemia. Early dumping symptoms comprise both gastrointestinal and vasomotor symptoms. Late dumping symptoms are the result of reactive hypoglycemia. Besides the assessment of clinical alertness and endoscopic or radiological imaging, a modified oral glucose tolerance test might help to establish a diagnosis. The first step in treating dumping syndrome is the introduction of dietary measures. Acarbose can be added to these measures for patients with hypoglycemia, whereas several studies advocate guar gum or pectin to slow gastric emptying. Somatostatin analogs are the most effective medical therapy for dumping syndrome, and a slow-release preparation is the treatment of choice. In patients with treatment-refractory dumping syndrome, surgical reintervention or continuous enteral feeding can be considered, but the outcomes of such approaches are variable.

  18. Chevron beam dump for ITER edge Thomson scattering system.

    Science.gov (United States)

    Yatsuka, E; Hatae, T; Vayakis, G; Bassan, M; Itami, K

    2013-10-01

    This paper contains the design of the beam dump for the ITER edge Thomson scattering system and mainly concerns its lifetime under the harsh thermal and electromagnetic loads as well as tight space allocation. The lifetime was estimated from the multi-pulse laser-induced damage threshold. In order to extend its lifetime, the structure of the beam dump was optimized. A number of bent sheets aligned parallel in the beam dump form a shape called a chevron which enables it to avoid the concentration of the incident laser pulse energy. The chevron beam dump is expected to withstand thermal loads due to nuclear heating, radiation from the plasma, and numerous incident laser pulses throughout the entire ITER project with a reasonable margin for the peak factor of the beam profile. Structural analysis was also carried out in case of electromagnetic loads during a disruption. Moreover, detailed issues for more accurate assessments of the beam dump's lifetime are clarified. Variation of the bi-directional reflection distribution function (BRDF) due to erosion by or contamination of neutral particles derived from the plasma is one of the most critical issues that needs to be resolved. In this paper, the BRDF was assumed, and the total amount of stray light and the absorbed laser energy profile on the beam dump were evaluated.

  19. Chevron beam dump for ITER edge Thomson scattering system

    Science.gov (United States)

    Yatsuka, E.; Hatae, T.; Vayakis, G.; Bassan, M.; Itami, K.

    2013-10-01

    This paper contains the design of the beam dump for the ITER edge Thomson scattering system and mainly concerns its lifetime under the harsh thermal and electromagnetic loads as well as tight space allocation. The lifetime was estimated from the multi-pulse laser-induced damage threshold. In order to extend its lifetime, the structure of the beam dump was optimized. A number of bent sheets aligned parallel in the beam dump form a shape called a chevron which enables it to avoid the concentration of the incident laser pulse energy. The chevron beam dump is expected to withstand thermal loads due to nuclear heating, radiation from the plasma, and numerous incident laser pulses throughout the entire ITER project with a reasonable margin for the peak factor of the beam profile. Structural analysis was also carried out in case of electromagnetic loads during a disruption. Moreover, detailed issues for more accurate assessments of the beam dump's lifetime are clarified. Variation of the bi-directional reflection distribution function (BRDF) due to erosion by or contamination of neutral particles derived from the plasma is one of the most critical issues that needs to be resolved. In this paper, the BRDF was assumed, and the total amount of stray light and the absorbed laser energy profile on the beam dump were evaluated.

  20. Magnetic wormholes and black universes with invisible ghosts

    CERN Document Server

    Bronnikov, K A

    2015-01-01

    We construct explicit examples of globally regular static, spherically symmetric solutions in general relativity with scalar and electromagnetic fields describing traversable wormholes with flat and AdS asymptotics and regular black holes, in particular, black universes. (A black universe is a regular black hole with an expanding, asymptotically isotropic space-time beyond the horizon.) The existence of such objects requires invoking scalars with negative kinetic energy ("phantoms", or "ghosts"), which are not observed under usual physical conditions. To account for that, the so-called "trapped ghosts" were previously introduced, i.e., scalars whose kinetic energy is only negative in a restricted strong-field region of space-time and positive outside it. This approach leads to certain problems, including instability (as is illustrated here by derivation of an effective potential for spherical pertubations of such systems). In this paper, we use for model construction what we call "invisible ghosts", i.e., pha...

  1. Bosonic Ghosts at $c=2$ as a Logarithmic CFT

    CERN Document Server

    Ridout, David

    2014-01-01

    Motivated by Wakimoto free field realisations, the bosonic ghost system of central charge $c=2$ is studied using a recently proposed formalism for logarithmic conformal field theories. This formalism addresses the modular properties of the theory with the aim being to determine the (Grothendieck) fusion coefficients from a variant of the Verlinde formula. The key insight, in the case of bosonic ghosts, is to introduce a family of parabolic Verma modules which dominate the spectrum of the theory. The results include S-transformation formulae for characters, non-negative integer Verlinde coefficients, and a family of modular invariant partition functions. The logarithmic nature of the corresponding ghost theories is explicitly verified using the Nahm-Gaberdiel-Kausch fusion algorithm.

  2. Generalized ghost dark energy in Brans-Dicke theory

    CERN Document Server

    Sheykhi, A; Yosefi, Y

    2013-01-01

    It was argued that the vacuum energy of the Veneziano ghost field of QCD, in a time-dependent background, can be written in the general form, $H + O(H^2)$, where $H$ is the Hubble parameter. Based on this, a phenomenological dark energy model whose energy density is of the form $\\rho=\\alpha H+\\beta H^{2}$ was recently proposed to explain the dark energy dominated universe. In this paper, we investigate this generalized ghost dark energy model in the setup of Brans-Dicke cosmology. We study the cosmological implications of this model. In particular, we obtain the equation of state and the deceleration parameters and a differential equation governing the evolution of this dark energy model. It is shown that the equation of state parameter of the new ghost dark energy can cross the phantom line ($w_D=-1$) provided the parameters of the model are chosen suitably.

  3. Ombud’s corner: Do you believe in ghosts?

    CERN Multimedia

    Sudeshna Datta-Cockerill

    2014-01-01

    “Ghosting” is the common term used to describe situations when a piece of work is done by somebody but credited to somebody else. Ghosting often occurs in creative fields, such as writing texts, music, developing graphic charters or translating. Let’s celebrate Halloween this year by acknowledging the contributions of all the CERN ghosts who work tirelessly behind the scenes in all areas of the Organization.   “Ghosting” is a recognised job with international professional associations, particularly in the field of text writing. The role requires strict anonymity, good reciprocal trust and understanding between the people involved, and the professional flexibility to be able to adapt to different situations and different styles of expression as needed. At CERN there are many ghosts: you can find them in the Translation and Minute-writing service, whose members also provide valuable editing and proof-reading skills; in the Communications group w...

  4. Optical secure image verification system based on ghost imaging

    Science.gov (United States)

    Wu, Jingjing; Haobogedewude, Buyinggaridi; Liu, Zhengjun; Liu, Shutian

    2017-09-01

    The ghost imaging can perform Fourier-space filtering by tailoring the configuration. We proposed a novel optical secure image verification system based on this theory with the help of phase matched filtering. In the verification process, the system key and the ID card which contain the information of the correct image and the information to be verified are put in the reference and the test paths, respectively. We demonstrate that the ghost imaging configuration can perform an incoherent correlation between the system key and the ID card. The correct verification manifests itself with a correlation peak in the ghost image. The primary image and the image to be verified are encrypted and encoded into pure phase masks beforehand for security. Multi-image secure verifications can also be implemented in the proposed system.

  5. The Ghost Tradition: Helen Of Troy In The Elizabethan Era

    Directory of Open Access Journals (Sweden)

    RADUCANU ADRIANA

    2014-12-01

    Full Text Available Reputedly the most beautiful woman who has ever lived, Helen of Troy (or Sparta is less well known for her elusive, ghost-like dimension. Homer wrote that the greatest war of Western classical antiquity started because of Helen's adultery followed by her elopement to Troy. Other ancient writers and historians, among theme Aeschylus, Stesichorus, Hesiod, Pausanias, Aristophanes, Euripides and Gorgias of Leontini, challenged the Homeric version, in various ways and attempted to exonerate Helen either by focusing on her phantom/ ghost/ as the generic object of man's desire and scorn or by casting doubt on the mechanisms of the blaming process. This paper argues that the Elizabethans Christopher Marlowe and William Shakespeare adopted and adapted the anti-Homer version of the depiction of Helen, what I here call “the ancient Helen ghost tradition”; nevertheless, in so doing they further reinforced the character's demonic features and paradoxically achieved a return to the adulterous Homeric Helen.

  6. Ghost wavefunction renormalization in asymptotically safe quantum gravity

    Energy Technology Data Exchange (ETDEWEB)

    Groh, Kai; Saueressig, Frank, E-mail: kgroh@thep.physik.uni-mainz.d, E-mail: saueressig@thep.physik.uni-mainz.d [Institute of Physics, University of Mainz, Staudingerweg 7, D-55099 Mainz (Germany)

    2010-09-10

    Motivated by Weinberg's asymptotic safety scenario, we investigate the gravitational renormalization group flow in the Einstein-Hilbert truncation supplemented by the wavefunction renormalization of the ghost fields. The latter induces non-trivial corrections to the {beta}-functions for Newton's constant and the cosmological constant. The resulting ghost-improved phase diagram is investigated in detail. In particular, we find a non-trivial ultraviolet fixed point, in agreement with the asymptotic safety conjecture which also survives in the presence of extra dimensions. In four dimensions the ghost anomalous dimension at the fixed point is {eta}*{sub c} = -1.8, supporting spacetime being effectively two dimensional at short distances.

  7. Modelling of classical ghost images obtained using scattered light

    Science.gov (United States)

    Crosby, S.; Castelletto, S.; Aruldoss, C.; Scholten, R. E.; Roberts, A.

    2007-08-01

    The images obtained in ghost imaging with pseudo-thermal light sources are highly dependent on the spatial coherence properties of the incident light. Pseudo-thermal light is often created by reducing the coherence length of a coherent source by passing it through a turbid mixture of scattering spheres. We describe a model for simulating ghost images obtained with such partially coherent light, using a wave-transport model to calculate the influence of the scattering on initially coherent light. The model is able to predict important properties of the pseudo-thermal source, such as the coherence length and the amplitude of the residual unscattered component of the light which influence the resolution and visibility of the final ghost image. We show that the residual ballistic component introduces an additional background in the reconstructed image, and the spatial resolution obtainable depends on the size of the scattering spheres.

  8. Coal recovery from a coal waste dump

    Directory of Open Access Journals (Sweden)

    Rozanski Zenon

    2016-01-01

    Full Text Available The possibilities and efficiency of coal recovery from the waste material located at the Central Coal Waste Dump in Poland were presented in this paper. The waste material includes significant amount of fly ash. Research conducted into determination of energetic properties of such wastes showed that the average ash content was 75.75% and the average gross calorific value was 7.81 MJ/kg. Coal was gravitationally separated from the waste material in a pulsatory jig and in a spiral washer including size fractions: 30-5 and 8-0 mm (this was crushed to a size <3.2 mm, respectively. The application of the pulsatory jig (pulse classifier allowed to obtain a high-quality energetic concentrate with the ash content lower than 12% and the gross calorific value higher than 26 MJ/kg (with average yield 7.8%. The spiral separator gave much worse results. The average gross calorific value for the concentrate was 11.6 MJ/kg, with the high ash content 56.5% and yield approximately 26%.

  9. Massive gravity coupled to DBI Galileons is ghost free

    CERN Document Server

    Andrews, Melinda; Hinterbichler, Kurt; Stokes, James; Trodden, Mark

    2013-01-01

    It is possible to couple Dirac-Born-Infeld (DBI) scalars possessing generalized Galilean internal shift symmetries (Galileons) to nonlinear massive gravity in four dimensions, in such a manner that the interactions maintain the Galilean symmetry. Such a construction is of interest because it is not possible to couple such fields to massless General Relativity in the same way. We show that this theory has the primary constraint necessary to eliminate the Boulware-Deser ghost, thus preserving the attractive properties of both the Galileons and ghost-free massive gravity.

  10. Reconstructing QCD ghost $f(R,T)$ models

    CERN Document Server

    Zubair, M

    2016-01-01

    We reconstruct $f(R,T)$ theory (where $R$ is the scalar curvature and $T$ is the trace of energy-momentum tensor) in the framework of QCD ghost dark energy models. In this study, we concentrate on particular models of $f(R,T)$ gravity which permits the standard continuity equation in this theory. It is found that reconstructed function can represent phantom and quintessence regimes of the universe in the background of flat FRW universe. In addition, we explore the stability of ghost $f(R,T)$ models.

  11. Unifying Ghost-Free Lorentz-Invariant Lagrangians

    CERN Document Server

    Li, Wenliang

    2015-01-01

    We present the details of the novel framework for Lagrangian field theories that are Lorentz-invariant and lead to at most second order equations of motion. The use of antisymmetric structure is of crucial importance. The general ghost-free Lagrangians are constructed and then translated into the language of differential forms. The ghost-freeness has a geometric nature. A novel duality is proposed which generalizes the Hodge duality in Maxwell's theory. We discuss how the well-established theories are reformulated and propose many new theories.

  12. Ghost-free, finite, fourth-order D = 3 gravity.

    Science.gov (United States)

    Deser, S

    2009-09-04

    Canonical analysis of a recently proposed linear + quadratic curvature gravity model in D = 3 establishes its pure, irreducibly fourth derivative, quadratic curvature limit as both ghost-free and power-counting UV finite, thereby maximally violating standard folklore. This limit is representative of a generic class whose kinetic terms are conformally invariant in any dimension, but it is unique in simultaneously avoiding the transverse-traceless graviton ghosts plaguing D > 3 quadratic actions as well as double pole propagators in its other variables. While the two-term model is also unitary, its additional mode's second-derivative nature forfeits finiteness.

  13. Universal scaling of gluon and ghost propagators in the infrared

    CERN Document Server

    Siringo, Fabio

    2016-01-01

    A universal behavior is predicted for ghost and gluon propagators in the infrared. The universal behavior is shown to be a signature of a one-loop approximation and emerges naturally by the massive expansion that predicts universal analytical functions for the inverse dressing functions that do not depend on any parameter or color number. By a scaling of units and by adding an integration constant, all lattice data, for different color numbers (and even quark content for the ghosts), collapse on the same universal curves predicted by the massive expansion.

  14. Universal behavior of gluon and ghost propagators in the infrared

    Science.gov (United States)

    Siringo, Fabio

    2017-03-01

    A universal behavior is predicted for ghost and gluon propagators in the infrared. The universal behavior is shown to be a signature of a one-loop approximation and emerges naturally by the massive expansion that predicts universal analytical functions for the inverse dressing functions that do not depend on any parameter or color number. By a scaling of units and by adding an integration constant, all lattice data, for different color numbers (and even quark content for the ghosts), collapse on the same universal curves predicted by the massive expansion.

  15. The Ghost (Phantom) Universe A Model in which the Universe is Flat, Quantum Ghost Matter and Vacuum Dominated and Accelerating

    CERN Document Server

    Naboulsi, R

    2003-01-01

    We propose a modification of the Standard Hot Big Bang Cosmology (SHBBC), in which the Universe is flat, quantum matter dominated, and accelerating. The total energy density of the Universe is taken to be the sum of two terms: the quantum contributions from vacuum and plus an additional quantum (ghost) term (with negative pressure) which is responsible of the dominant driver of expansion at a late epoch of the Universe. When the new term dominates, the scalar factor varies as R propto t^frac{4}{3} (Accelerating Flat Ghost Universe). The quantum energy density required to close the Ghost Universe is found to be much smaller than in SHBBC, so that quantum matter can be sufficient to provide a flat geometry. Quantum matter particles interactions are interpreted as a quantum fifth force and it is found to vary as $F(r)\\propto r^{1/2}$.

  16. ¿Topología del fantasma? // Topology of the ghost?

    OpenAIRE

    2008-01-01

    Topology of the ghost is a challenge, a bet to put the role of the ghost in the clinic and its setting-up on the explanatory horizon getting close to topology. To this, we will divide the work into three parts: First, building the ghost; second, the ghost and its elements: a topology; and third, the ghost in the clinic. // Topología del fantasma es un reto, una apuesta donde se intentará poner en el horizonte explicativo, haciendo un uso aproximativo a la topología, el funcionamiento del fant...

  17. Pengaruh Pemberian Hormon Tiroksin Terhadap Pertumbuhan dan Kelangsungan Hidup Ikan Black Ghost (Apteronotus Albifrons)

    OpenAIRE

    Alwi, Dwi Aulia

    2016-01-01

    Black ghost fish is a fish which is good economic value, both in the national and international scope. Market demand for the black ghost fish high, so it requires an effort to fulfill consumer demand for the black ghost fish. One of the efforts is to giving stimulation with thyroxine hormone into the commercial feed which is used for the growth of the black ghost fish. This research aims to determine the optimum dose of decent used for the growth and survival of black ghost fish optimally. ...

  18. Modelling reactive transport in a phosphogypsum dump, Venezia, Italia

    Science.gov (United States)

    Calcara, Massimo; Borgia, Andrea; Cattaneo, Laura; Bartolo, Sergio; Clemente, Gianni; Glauco Amoroso, Carlo; Lo Re, Fabio; Tozzato, Elena

    2013-04-01

    We develop a reactive-transport porous media flow model for a phosphogypsum dump located on the intertidal deposits of the Venetian Lagoon: 1. we construct a complex conceptual and geologic model from field data using the GMS™ graphical user interface; 2. the geological model is mapped onto a rectangular MODFLOW grid; 3. using the TMT2 FORTRAN90 code we translate this grid into the MESH, INCON and GENER input files for the TOUGH2 series of codes; 4. we run TOUGH-REACT to model flow and reactive transport in the dump and the sediments below it. The model includes 3 different dump materials (phosphogypsum, bituminous and hazardous wastes) with the pores saturated by specific fluids. The sediments below the dump are formed by an intertidal sequence of calcareous sands and silts, in addition to clays and organic deposits, all of which are initially saturated with lagoon salty waters. The recharge rain-water dilutes the dump fluids. In turn, the percolates from the dump react with the underlying sediments and the sea water that saturates them. Simulation results have been compared with chemical sampled analyses. In fact, in spite of the simplicity of our model we are able to show how the pH becomes neutral at a short distance below the dump, a fact observed during aquifer monitoring. The spatial and temporal evolution of dissolution and precipitation reactions occur in our model much alike reality. Mobility of some elements, such as divalent iron, are reduced by specific and concurrent conditions of pH from near-neutrality to moderately high values and positive redox potential; opposite conditions favour mobility of potentially toxic metals such as Cr, As Cd and Pb. Vertical movement are predominant. Trend should be therefore heavily influenced by pH and Eh values. If conditions are favourable to mobility, concentration of these substances in the bottom strata could be high. However, simulation suggest that the sediments tend to reduce the transport potential of

  19. Uncoupled thermoelasticity solutions applied on beam dumps

    Science.gov (United States)

    Ouzia, A.; Antonakakis, T.

    2016-06-01

    In particle accelerators the process of beam absorption is vital. At CERN particle beams are accelerated at energies of the order of TeV. In the event of a system failure or following collisions, the beam needs to be safely absorbed by dedicated protecting blocks. The thermal shock caused by the rapid energy deposition within the absorbing block causes thermal stresses that may rise above critical levels. The present paper provides a convenient expression of such stresses under hypotheses described hereafter. The temperature field caused by the beam energy deposition is assumed to be Gaussian. Such a field models a non-diffusive heat deposition. These effects are described as thermoelastic as long as the stresses remain below the proportional limit and can be analytically modeled by the coupled equations of thermoelasticity. The analytical solution to the uncoupled thermoelastic problem in an infinite domain is presented herein and matched with a finite unit radius sphere. The assumption of zero diffusion as well as the validity of the match with a finite geometry is quantified such that the obtained solutions can be rigorously applied to real problems. Furthermore, truncated series solutions, which are not novel, are used for comparison purposes. All quantities are nondimensional and the problem reduces to a dependence of five dimensionless parameters. The equations of elasticity are presented in the potential formulation where the shear potential is assumed to be nil due to the source being a gradient and the absence of boundaries. Nevertheless equivalent three-dimensional stresses are computed using the compressive potential and optimized using standard analytical optimization methods. An alternative algorithm for finding the critical points of the three-dimensional stress function is presented. Finally, a case study concerning the proton synchrotron booster dump is presented where the aforementioned analytical solutions are used and the preceding assumptions

  20. Harriot, Digges, and the Ghost in Hamlet.

    Science.gov (United States)

    Usher, P. D.

    1998-12-01

    The cosmic allegorical interpretation of Hamlet (BAAS 28, 1305, 1996; 29, 1262, 1997; Giornale di Astronomia 24:3, 27, 1998) may be regarded as a Galilean postulatum with testable consequences. It associates leading characters in the play with cosmologists from the time of Ptolemy (Claudius) to Tycho Brahe (Rosencrantz and Guildenstern) and Thomas Digges (Hamlet). Lines 3.3.8-23 describe how the concepts of geocentricism and the sphere of fixed stars shared by the Ptolemaic and Tychonic models are imperiled by the Infinite Universe of Digges. Hitherto baffling lines 5.2.100-125 list in short order at least 16 attributes of Thomas Harriot, including his short bibliography (``soul of great article'') which may explain why he receives mention only in passing. The Ghost is Thomas Digges' father Leonard, who is a ``mole'' in the ``cellarage.'' That Leonard may have gone underground following restoration of his lands is supported by the range of years (1559-1574) of his alleged death, and conspicuous absence of a gravesite. Circumstances of his disappearance have remained mysterious (N&Q 2:X, 162, 1860; 6:X, 368, 515, 1884; 8:V, 186, 1894.) I suggest that, having been saved from execution and restored to gentility, he continued to work, writing in the tradition of his confrere's father Thomas Wyatt, Sr. who pioneered the English sonnet. The first Dowden series of sonnets reflects his love for his only child. The history of the perspective glass explains lines in Sonnets 14 and 103 (``my blunt invention'') and in the I.M.S. encomium wherein he did ``rowle back the heavens'' with a ``cleere and equall surface'' that is ``reflecting ages past.'' A portrait of Tycho helps date Sonnet 16 to between 1581 and 1585. Sonnets 18 and 87 would date to 1583 and 1595. Allusions to old age are not surprising. I.M.'s words: ``Wee wondred (Shake-speare) that thou went'st so soone'' and ``An Actors Art, can dye, and liue to acte a second part'' are explained, as are sources for The

  1. Fed-Batch Production of Bacterial Ghosts Using Dielectric Spectroscopy for Dynamic Process Control.

    Science.gov (United States)

    Meitz, Andrea; Sagmeister, Patrick; Lubitz, Werner; Herwig, Christoph; Langemann, Timo

    2016-03-24

    The Bacterial Ghost (BG) platform technology evolved from a microbiological expression system incorporating the ϕX174 lysis gene E. E-lysis generates empty but structurally intact cell envelopes (BGs) from Gram-negative bacteria which have been suggested as candidate vaccines, immunotherapeutic agents or drug delivery vehicles. E-lysis is a highly dynamic and complex biological process that puts exceptional demands towards process understanding and control. The development of a both economic and robust fed-batch production process for BGs required a toolset capable of dealing with rapidly changing concentrations of viable biomass during the E-lysis phase. This challenge was addressed using a transfer function combining dielectric spectroscopy and soft-sensor based biomass estimation for monitoring the rapid decline of viable biomass during the E-lysis phase. The transfer function was implemented to a feed-controller, which followed the permittivity signal closely and was capable of maintaining a constant specific substrate uptake rate during lysis phase. With the described toolset, we were able to increase the yield of BG production processes by a factor of 8-10 when compared to currently used batch procedures reaching lysis efficiencies >98%. This provides elevated potentials for commercial application of the Bacterial Ghost platform technology.

  2. Fed-Batch Production of Bacterial Ghosts Using Dielectric Spectroscopy for Dynamic Process Control

    Directory of Open Access Journals (Sweden)

    Andrea Meitz

    2016-03-01

    Full Text Available The Bacterial Ghost (BG platform technology evolved from a microbiological expression system incorporating the ϕX174 lysis gene E. E-lysis generates empty but structurally intact cell envelopes (BGs from Gram-negative bacteria which have been suggested as candidate vaccines, immunotherapeutic agents or drug delivery vehicles. E-lysis is a highly dynamic and complex biological process that puts exceptional demands towards process understanding and control. The development of a both economic and robust fed-batch production process for BGs required a toolset capable of dealing with rapidly changing concentrations of viable biomass during the E-lysis phase. This challenge was addressed using a transfer function combining dielectric spectroscopy and soft-sensor based biomass estimation for monitoring the rapid decline of viable biomass during the E-lysis phase. The transfer function was implemented to a feed-controller, which followed the permittivity signal closely and was capable of maintaining a constant specific substrate uptake rate during lysis phase. With the described toolset, we were able to increase the yield of BG production processes by a factor of 8–10 when compared to currently used batch procedures reaching lysis efficiencies >98%. This provides elevated potentials for commercial application of the Bacterial Ghost platform technology.

  3. Data convolution and combination operation (COCOA) for motion ghost artifacts reduction.

    Science.gov (United States)

    Huang, Feng; Lin, Wei; Börnert, Peter; Li, Yu; Reykowski, Arne

    2010-07-01

    A novel method, data convolution and combination operation, is introduced for the reduction of ghost artifacts due to motion or flow during data acquisition. Since neighboring k-space data points from different coil elements have strong correlations, a new "synthetic" k-space with dispersed motion artifacts can be generated through convolution for each coil. The corresponding convolution kernel can be self-calibrated using the acquired k-space data. The synthetic and the acquired data sets can be checked for consistency to identify k-space areas that are motion corrupted. Subsequently, these two data sets can be combined appropriately to produce a k-space data set showing a reduced level of motion induced error. If the acquired k-space contains isolated error, the error can be completely eliminated through data convolution and combination operation. If the acquired k-space data contain widespread errors, the application of the convolution also significantly reduces the overall error. Results with simulated and in vivo data demonstrate that this self-calibrated method robustly reduces ghost artifacts due to swallowing, breathing, or blood flow, with a minimum impact on the image signal-to-noise ratio. (c) 2010 Wiley-Liss, Inc.

  4. Cinematography in Motherhood: a Hong Kong film adaptation of Ghosts

    Directory of Open Access Journals (Sweden)

    Kwok-kan Tam

    2015-02-01

    Full Text Available This is a study of a Hong Kong Chinese film adaptation of Ghosts made in 1960. It deals with processes of cross-cultural and cross-media adaptation, and probes issues of how stage techniques are turned into cinematographic devices. Ibsen’s plays, except Ghosts, have been adapted numerous times for the Chinese stage and screen in Hong Kong and China. Unlike in China, the reception of Ibsen in Hong Kong is not meant for political purposes. In most Hong Kong adaptations, Ibsen is valued for the purpose of theatrical experimentation. Among the stage adaptations, A Doll’s House and The Master Builder are the most popular. However, there was a film adaptation of Ghosts in 1960, which has never been discussed in Ibsen scholarship. In this adaptation, Director Tso Kea borrowed the plot from Ghosts and made a perfect Chinese melodrama film highlighting the Chinese emotions and relations in a wealthy family that undergoes a crisis. In traditional Chinese drama, there is the lack of psychological rendering in characterization and characters act according to moral considerations. In Tso Kea’s film, the portrayal of the mother provides a new sense of characterization by combining Mrs Alving with the traditional Chinese mother figure. The borrowing from Ibsen makes it possible for the Chinese film to create a character with emotional and psychological complexities. Images from the film are selected as illustration in the article.

  5. Testing OPE for ghosts, gluons and $\\alpha_s$

    CERN Document Server

    Blossier, Benoit; Brinet, Mariane; Morenas, vincent; Pene, Olivier; Petrov, Konstantin; Rodriguez-Quinteiro, Jose; de Soto, Feliciano

    2013-01-01

    We present here our results on extracting Wilson coefficients from different quantities such as ghost and gluon propagators which are calculated by means of Lattice QCD. The results confirm the validity of our method for the calculation of the strong coupling constant as well as allow to estimate the range of momenta where OPE is applicable.

  6. Suppressing Ghost Diffraction in E-Beam-Written Gratings

    Science.gov (United States)

    Wilson, Daniel; Backlund, Johan

    2009-01-01

    A modified scheme for electron-beam (E-beam) writing used in the fabrication of convex or concave diffraction gratings makes it possible to suppress the ghost diffraction heretofore exhibited by such gratings. Ghost diffraction is a spurious component of diffraction caused by a spurious component of grating periodicity as described below. The ghost diffraction orders appear between the main diffraction orders and are typically more intense than is the diffuse scattering from the grating. At such high intensity, ghost diffraction is the dominant source of degradation of grating performance. The pattern of a convex or concave grating is established by electron-beam writing in a resist material coating a substrate that has the desired convex or concave shape. Unfortunately, as a result of the characteristics of electrostatic deflectors used to control the electron beam, it is possible to expose only a small field - typically between 0.5 and 1.0 mm wide - at a given fixed position of the electron gun relative to the substrate. To make a grating larger than the field size, it is necessary to move the substrate to make it possible to write fields centered at different positions, so that the larger area is synthesized by "stitching" the exposed fields.

  7. Testing cladograms by fossil record: the ghost range test

    NARCIS (Netherlands)

    Rasnitsyn, Alexandr P.

    2000-01-01

    A method of the ghost range calculation is proposed to assess the congruence between a cladogram and the fossil record and to compare cladograms on this basis. The method is tested on a set of cladograms developed recently to reveal the phylogeny of the hymenopterous insects (Order Vespida), and the

  8. High Speed Computational Ghost Imaging via Spatial Sweeping

    Science.gov (United States)

    Wang, Yuwang; Liu, Yang; Suo, Jinli; Situ, Guohai; Qiao, Chang; Dai, Qionghai

    2017-01-01

    Computational ghost imaging (CGI) achieves single-pixel imaging by using a Spatial Light Modulator (SLM) to generate structured illuminations for spatially resolved information encoding. The imaging speed of CGI is limited by the modulation frequency of available SLMs, and sets back its practical applications. This paper proposes to bypass this limitation by trading off SLM’s redundant spatial resolution for multiplication of the modulation frequency. Specifically, a pair of galvanic mirrors sweeping across the high resolution SLM multiply the modulation frequency within the spatial resolution gap between SLM and the final reconstruction. A proof-of-principle setup with two middle end galvanic mirrors achieves ghost imaging as fast as 42 Hz at 80 × 80-pixel resolution, 5 times faster than state-of-the-arts, and holds potential for one magnitude further multiplication by hardware upgrading. Our approach brings a significant improvement in the imaging speed of ghost imaging and pushes ghost imaging towards practical applications. PMID:28358010

  9. Evaluation of high frequency ghost cavitation emissions for two different seismic air-gun arrays using numerical modelling

    Science.gov (United States)

    Khodabandeloo, Babak; Landrø, Martin

    2017-04-01

    Sound is deployed by marine mammals for variety of vital purposes such as finding food, communication, echolocation, etc. On the other hand human activities generate underwater noise. One major type of acoustic source is marine seismic acquisition which is carried out to image layers beneath the seabed exploiting reflected acoustic and elastic waves. Air-gun arrays are the most common and efficient marine seismic sources. Field measurements using broad band hydrophones have revealed that acoustic energies emitted by air-gun arrays contains frequencies from a few Hz up to tens of kHz. Frequencies below 200 Hz benefit seismic imaging and the rest is normally considered as wasted energy. On the other hand, the high frequency range (above 200 Hz) overlaps with hearing curves of many marine mammals and especially toothed whales and may have an impact on their behavior. A phenomenon called ghost cavitation is recently recognized to be responsible for a major part of these high frequencies (> 5 kHz). Acoustic pressure waves of individual air guns reflected from sea surface can cause the hydrostatic pressure to drop towards zero close to the source array. In these regions there is a high probability for water vapor cavity growth and subsequent collapse. We have simulated ghost cavitation cloud using numerical modelling and the results are validated by comparing with field measurements. The model is used to compare the amount of high frequency noise due to ghost cavitation for two different air gun arrays. Both of the arrays have three subarrays but the array distance for the one with 2730 in3 air volume is 6 meters and for the slightly bigger array (3250 in3 in air volume) the subarrays are separated by 8 meters. Simulation results indicate that the second array, despite larger subarray distance, generates stronger ghost cavitation signal.

  10. Natural vegetation recovery on waste dump in opencast coalmine area

    Institute of Scientific and Technical Information of China (English)

    CHENG Jian-long; LU Zhao-hua

    2005-01-01

    The changes of vegetation compositions, plant species diversity, species important value and succession of plant community were studied on waste dumps in Haizhou opencast coalmine which is located in the west of Liaoning Province, China (41°41(-42°56( N, 121°1(-122°56(E). Four kinds of terraces with different ages (5, 10, 20 and 40 years) were selected for investigation of plants. Total of 63 species of natural colonized plants were recorded on the waste dump and they belong to 23 families. The main families were Compositae (15 species), Fabaceae (11 species) and Leguminosae (8 species), which accounted for 54.0% of total species and play an important role in natural vegetation recovery in waste dump area. The dominant species on 5-, 10-, 20-, 40-year-old terraces were Tribulus terrestris + Echinochloa hispidula + Salsola collina, Echinochloa hispidula + Artemisia sieversiana + Artemisia scoparia, Echinochloa hispidula + Clinelymus dahuricus + Artemisia scoparia + Artemisia sieversiana + Melilotus officinalis, Clinelymus dahuricus+Phragmites communis + Echinochloa hispidula+ Setaria viridis, respectively. According to the important value of species calculated. It is determined that Tribulus terrestris can act as pioneer species on waste dump and Clinelymus dahuricus, Phragmites communis and Echinochloah hispidula are important dominant species in vegetation restoration in Haizhou opencast coalmine. The study results can provide scientific basis for selecting and disposing appropriately plant species and rehabilitating vegetation on waste dumps of coalmine.

  11. Neutral beam dump with cathodic arc titanium gettering.

    Science.gov (United States)

    Smirnov, A; Krivenko, A S; Murakhtin, S V; Savkin, V Ya; Korepanov, S A; Putvinski, S

    2011-03-01

    An incomplete neutral beam capture can degrade the plasma performance in neutral beam driven plasma machines. The beam dumps mitigating the shine-through beam recycling must entrap and retain large particle loads while maintaining the beam-exposed surfaces clean of the residual impurities. The cathodic arc gettering, which provides high evaporation rate coupled with a fast time response, is a powerful and versatile technique for depositing clean getter films in vacuum. A compact neutral beam dump utilizing the titanium arc gettering was developed for a field-reversed configuration plasma sustained by 1 MW, 20-40 keV neutral hydrogen beams. The titanium evaporator features a new improved design. The beam dump is capable of handling large pulsed gas loads, has a high sorption capacity, and is robust and reliable. With the beam particle flux density of 5 × 10(17) H∕(cm(2) s) sustained for 3-10 ms, the beam recycling coefficient, defined as twice the ratio of the hydrogen molecular flux leaving the beam dump to the incident flux of high-energy neutral atoms, is ∼0.7. The use of the beam dump allows us to significantly reduce the recycling of the shine-through neutral beam as well as to improve the vacuum conditions in the machine.

  12. Wavelength-multiplexed ghost imaging in time (Conference Presentation)

    Science.gov (United States)

    Ryczkowski, Piotr; Genty, Goëry; Barbier, Margaux; Friberg, Ari T.; Dudley, John M.

    2017-02-01

    Ghost imaging is an optical technique that produces the image of an object by correlating the total amount of light transmitted through the object with the random intensity pattern that the object is irradiated with. When the technique is used with incoherent light sources, characterized by random temporal intensity fluctuations, it requires recording a very large number of distinct realizations to obtain a faithful image reproduction. In order to significantly reduce the number of realizations, one can use pre-programmed known patterns, so-called computational ghost imaging. Recently, ghost imaging was transposed into the time-domain to image ultrafast varying waveforms. Here, we report on a novel proof-of-concept experiment of computational ghost imaging in the time domain using wavelength multiplexing. By encoding different time-varying intensity patterns onto separate wavelength channels, we can perform simultaneous measurement of multiple realizations. This allows us to perform ghost imaging in real-time, without the need of probing the time-varying object repeatedly. Specifically, we use a programmable spectral filter to encode a set of 32 Hadamard-like time-varying intensity patterns onto a broadband LED light source. An electro-optic intensity modulator driven by an electrical waveform is used to create the time-varying object to be measured. The object is then reconstructed "blindly" by correlating the time-averaged transmission of each wavelength channels with the digitized form of the time-varying Hadamard patterns that illuminate the object. The temporal resolution of the measurement is currently to 0.5 s limited by the speed at which the variable spectral filter can be manipulated.

  13. AXAF-I ghost ray study: On orbit case

    Science.gov (United States)

    Gaetz, T. J.

    1993-01-01

    The problem of baffles for control of singly reflected (and nonreflected) ghost rays is considered. The theory of baffle design for Wolter Type I grazing incidence optics is reviewed, and a set of sample baffle parameters is obtained subject to the assumptions of nominal mirror figures and perfect manufacture and alignment of baffles. It is found that baffles forward of the optics (in the thermal precollimator) and between the mirror elements (at the CAP) are sufficient to allow the simultaneous ghost image and vignetting requirements to be satisfied for HRMA shells P1H1, P3H3, and P4H4. However, these baffles are not sufficient for the innermost shell P6H6; at best the requirements are slightly violated and there is no margin for tolerances. The addition of a baffle interior to the P6 space at an axial station about one third of the way forward from the aft end of the paraboloid will allow the ghost ray and vignetting requirements to be met. The minimum ghost ray angles and the vignetting angles are sensitive functions of the baffle positions and radii; tolerances of considerably better than 1 mm will be required. The sensitivities are coupled and correlated; further investigations should be undertaken in order to obtain baffle parameters which, combined with likely achievable tolerances, will minimize the risk of the vignetting/ghost ray requirements not being met. The lightweight carbon-epoxy composite used for thermal baffles has insufficient X-ray opacity to be a suitable material for construction of the controlling X-ray baffles; further study is needed to determine an appropriate material and to investigate its thermal and mechanical implications.

  14. Ghost imaging and ghost diffraction with pseudo-thermal light generated by means of a programmable SLM

    Energy Technology Data Exchange (ETDEWEB)

    Capeluto, M G; Schmiegelow, C T; Francisco, D; Ledesma, S; Iemmi, C [Departamento de Fisica J.J.Giambiagi, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1426 Buenos Aires (Argentina); Duisterwinkel, H, E-mail: iemmi@df.uba.ar [University of Groningen, 9747 AG Groningen (Netherlands)

    2011-01-01

    Ghost imaging and ghost diffraction are techniques in which information about the object or about its diffraction pattern is extracted by measuring the correlation between a reference beam and a beam that passes through the object. Although first experiments were carried on by using entangled photons, it was demonstrated that this technique can be performed by splitting incoherent pseudo-thermal radiation such as that obtained with a laser passing through a moving diffuser. In this work we implemented the use of a programmable phase spatial light modulator (SLM) in order to replace the rotating ground glass. In this way the random phase distributions obtained from the moving diffuser can be emulated by displaying onto the SLM different realizations of a random function with uniform distribution. Based on the programmability of the modulator we have studied the influence of diverse parameters such as speckle size or phase distributions in the final image quality. We carry on the experiment for two different cases ghost imaging and far field ghost diffraction.

  15. Notes on dumping gold beam in the AGS

    Energy Technology Data Exchange (ETDEWEB)

    Gardner, C.J.; Ahrens, L.; Thieberger, P.

    2010-08-01

    Localized losses of gold beam in the AGS during RHIC Run 8 produced vacuum leaks which required the replacement of several vacuum chambers. A review of what happened and why was given by Leif Ahrens at the Run 8 Retreat. The following notes trace the subsequent development of clean dumping of gold beam on the beam dump in the J10 straight. The novel idea of stripping Au77+ ions in order to put them directly into the upstream face of the dump was introduced by Leif Ahrens and developed by all three of us. George Mahler made the actual stripping device and Dave Gassner developed its control. Leif Ahrens successfully commissioned the device with gold beam during Run 10. The reader may find it helpful to first view the figures herein and then refer to the text for details.

  16. CZCS view of an oceanic acid waste dump

    Science.gov (United States)

    Elrod, Jane A.

    1988-01-01

    Plumes from the acid waste dump in the New York Bight were visible in all nine cloud-free Coastal Zone Color Scanner images from April and May 1981. The CZCS subsurface radiance channels displayed consistent spectral characteristics, which consisted of a strong increase in the 550 nm channel and a moderate increase in the 520 nm channel relative to the surrounding coastal waters. The 443 nm channel showed no change or a slight decrease in radiance within the plumes. These anomalous radiances preclude the calculation of pigment in the dump plumes using existing algorithms. However, the high radiances of the 550 nm channel can be used to examine the flow patterns of surface water in the vicinity of the dump.

  17. Københavns Kommunes indsats mod social dumping - målopfyldelsesevaluering

    DEFF Research Database (Denmark)

    Baadsgaard, Kelvin; Jørgensen, Henning

    2016-01-01

    Evaluering af, om de politiske intentioner med indsats mod social dumping i Københavns Kommune er blevet indfriet......Evaluering af, om de politiske intentioner med indsats mod social dumping i Københavns Kommune er blevet indfriet...

  18. Calculation notes that support accident scenario and consequence of the evaporator dump

    Energy Technology Data Exchange (ETDEWEB)

    Crowe, R.D., Westinghouse Hanford

    1996-09-09

    The purpose of this calculation note is to provide the basis for evaporator dump consequence for the Tank Farm Safety Analysis Report (FSAR). Evaporator Dump scenario is developed and details and description of the analysis methods are provided.

  19. ECONOMIC EVALUATION OF GOLD-ORE DUMP REPROCESSING EFFICIENCY

    Directory of Open Access Journals (Sweden)

    N. Y. Samsonov

    2010-06-01

    Full Text Available An economic projection is presented in the paper on the heap leaching technology for extracting a residual gold from the gold-ore dumps accumulated at the exploited or closed gold mines. A brief analysis is performed on the legal status of use this source of raw materials, availability and efficiency of the heap leaching method are reviewed, and the potential users of this method are assessed. An investment plan is created for involving anthropogenic dumps of gold-raw materials at one of the ore deposits in Siberia (heap complex of the North-Western flank of the Sovetskoye minefield, Krasnoyarsk region, North-Yenisey area.

  20. Neutronics Assessments for a RIA Fragmentation Line Beam Dump Concept

    CERN Document Server

    Boles, Jason; Reyes, Susana; Stein, Werner

    2005-01-01

    Heavy ion and radiation transport calculations are in progress for conceptual beam dump designs for the fragmentation line of the proposed Rare Isotope Accelerator (RIA). Using the computer code PHITS, a preliminary design of a motor-driven rotating wheel beam dump and adjacent downstream multipole has been modeled. Selected results of these calculations are given, including neutron and proton flux in the wheel, absorbed dose and displacements per atom in the hub materials, and heating from prompt radiation and from decay heat in the multipole.

  1. Phytoremediation of spoil coal dumps in Western Donbass (Ukraine)

    Science.gov (United States)

    Klimkina, Iryna; Kharytonov, Mykola; Wiche, Oliver; Heilmeier, Hermann

    2017-04-01

    At the moment, in Ukraine about 150 thousand hectares of fertile land are occupied by spoil dumps. Moreover, this figure increases every year. According to the technology used about 1500 m3 of adjacent stratum is dumped at the surface per every 1000 tons of coal mined. Apart from land amortization, waste dumps drastically change the natural landscape and pollute air, soil and water sources as the result of water and wind erosion, as well as self-ignition processes. A serious concern exists with respect to the Western Donbass coal mining region in Ukraine, where the coal extraction is made by the subsurface way and solid wastes are represented by both spoil dumps and wastes after coal processing. Sulphides, mostly pyrite (up to 4% of waste material), are widely distributed in the waste heaps freshly removed due to coal mining in Western Donbass.The oxidation of pyrite with the presence of oxygen and water is accompanied by a sharp drop in the pH from the surface layer to the spoil dumps(from 5.2-6.2 to 3.9-4.2 in soil substrates with chernozen and from 8.3-8.4 to 6.7-7.2 in soil substrates with red-brown clay, stabilizing in dump material in both cases at 2.9-3.2). Low pH generates the transformation of a number of toxic metals and other elementspresent in waste rock (e.g. Fe, Al, Mn, Zn, Mo, Co, As, Cd, Bi, Pb, U) into mobile forms. To stabilize and reduce metal mobility the most resistant plants that occur naturally in specified ecosystems can be used. On coal spoil dumpsin Western Donbas the dominant species are Bromopsis inermis, subdominant Artemisia austriaca; widespread are also Festucas pp., Lathyrus tuberosus, Inula sp., Calamagrostis epigeios, Lotus ucrainicus, and Vicias pp. Identification of plants tolerant to target metals is a key issue in phytotechnology for soil restoration. It is hypothesized that naturally occurring plants growing on coal spoil dumps can be candidates for phytostabilization, phytoextraction (phytoaccumulation) and phytomining

  2. Environmental application of aerial reconnaissance to search for open dumps

    Science.gov (United States)

    Getz, Thomas J.; Randolph, J. C.; Echelberger, Wayne F.

    1983-11-01

    Three approaches to using aerial photography are evaluated for searching for open dumps in the state of Indiana. Photography with hand-held cameras from a small airplane proved more effective and flexible than either photo-interpretation of existing air photos or subcontracting to a federal agency for new aerial photography. The rationale for our choice of aerial reconnaissance, other uses of low-level aerial surveillance, the utility of small-format camera aerial photography for environmental analysis, and methods used for locating open dumps are discussed.

  3. Investigation of the acid mine drainage potential of the Kopanang rock dump, Vaal Reefs / Charl Labuschagne

    OpenAIRE

    Labuschagne, Charl

    2008-01-01

    The Kopanang rock dump is one of several rock dumps in the Vaal Reefs gold mining area that may have an impact on the surface and groundwater quality. Few Acid Mine Drainage (AMD) studies exist on rock dumps in the South African gold industry due to the overwhelming acid generation from slime dams. Due to the existence of sulfide minerals in the Kopanang rock dump, there is a possibility that acid generation can occur, depending on the mineralogical composition of the ...

  4. Design aspects related to the reliability of the control architecture of the LHC beam dump kicker systems

    CERN Document Server

    Carlier, E; Bobbio, P; Gräwer, G; Marchand, A; Uythoven, J; Verhagen, H

    2003-01-01

    The LHC beam dump extraction kicker system consists per ring of 15 magnets and their pulse generators. Their task is to extract the beams on request, over the whole operational beam energy range and synchronously with the beam abort gap. This operation must be fail-safe to avoid damage to accelerator equipment by undesired beam losses. The control system of the LHC beam dump kickers will be based on a modular architecture composed of different subsystems, each with a specific function like slow control, beam energy tracking, beam abort gap synchronisation, fast pulse signal monitoring and post-mortem data acquisition. Depending on the required functionality, the subsystems will be based either on passive fault-tolerant redundant hardware solutions or on active fail-safe hardware and software solutions. In addition, for the most critical subsystems like the beam energy tracking and the beam abort gap synchronisation, two redundant solutions based on different technologies will be implemented in order to preven...

  5. Dumping syndrome after esophageal, gastric or bariatric surgery : pathophysiology, diagnosis, and management

    NARCIS (Netherlands)

    van Beek, A. P.; Emous, M.; Laville, Maurice; Tack, Johannes

    2017-01-01

    Background: Dumping syndrome, a common complication of esophageal, gastric or bariatric surgery, includes early and late dumping symptoms. Early dumping occurs within 1 h after eating, when rapid emptying of food into the small intestine triggers rapid fluid shifts into the intestinal lumen and rele

  6. 78 FR 36560 - Agency Information Collection Activities: Distribution of Continued Dumping and Subsidy Offset to...

    Science.gov (United States)

    2013-06-18

    ... Continued Dumping and Subsidy Offset to Affected Domestic Producers AGENCY: U.S. Customs and Border... of Continued Dumping and Subsidy Offset to Affected Domestic Producers (CDSOA). This request for... concerning the following information collection: Title: Distribution of Continued Dumping and Subsidy...

  7. 77 FR 61819 - WTO Dispute Settlement Proceeding Regarding United States-Countervailing and Anti-Dumping...

    Science.gov (United States)

    2012-10-11

    ...-Dumping Measures on Certain Products From China AGENCY: Office of the United States Trade Representative...-99''), and the countervailing and anti-dumping duty determinations and actions by the Department of....'' China also challenges the concurrent application of anti-dumping and countervailing duties under...

  8. 75 FR 16493 - Agency Information Collection Activities: Distribution of Continued Dumping and Subsidy Offset to...

    Science.gov (United States)

    2010-04-01

    ... Continued Dumping and Subsidy Offset to Affected Domestic Producers (CDSOA) AGENCY: U.S. Customs and Border... Dumping and Subsidy Offset to Affected Domestic Procedures. This request for comment is being made... Continued Dumping and Subsidy Offset to Affected Domestic Producers (CDSOA). OMB Number: 1651-0086....

  9. 78 FR 55280 - Agency Information Collection Activities: Distribution of Continued Dumping and Subsidy Offset to...

    Science.gov (United States)

    2013-09-10

    ... Continued Dumping and Subsidy Offset to Affected Domestic Producers AGENCY: U.S. Customs and Border...: Distribution of Continued Dumping and Subsidy Offset to Affected Domestic Producers (ADPs). This is a proposed... forms of information. Title: Distribution of Continued Dumping and Subsidy Offset to Affected...

  10. 75 FR 81533 - Antidumping Proceedings: Calculation of the Weighted Average Dumping Margin and Assessment Rate...

    Science.gov (United States)

    2010-12-28

    ... Weighted Average Dumping Margin and Assessment Rate in Certain Antidumping Duty Proceedings AGENCY: Import... comments regarding the calculation of the weighted average dumping margin and antidumping duty assessment...-specific export prices and average normal values and does not offset any dumping that is found with...

  11. 78 FR 38672 - Ocean Dumping; Sabine-Neches Waterway (SNWW) Ocean Dredged Material Disposal Site Designation

    Science.gov (United States)

    2013-06-27

    ... AGENCY 40 CFR Part 228 Ocean Dumping; Sabine-Neches Waterway (SNWW) Ocean Dredged Material Disposal Site... Entities B. Background C. Disposal Volume Limit D. Site Management and Monitoring Plan E. Ocean Dumping.... Ocean Dumping Site Designation Criteria In proposing to designate these Sites, the EPA assessed...

  12. 76 FR 5518 - Antidumping Proceedings: Calculation of the Weighted Average Dumping Margin and Assessment Rate...

    Science.gov (United States)

    2011-02-01

    ... Weighted Average Dumping Margin and Assessment Rate in Certain Antidumping Duty Proceedings AGENCY: Import... regarding the calculation of the weighted average dumping margin and antidumping duty assessment rate in... regarding the calculation of the weighted average dumping margin and antidumping duty assessment rate...

  13. 75 FR 33708 - Ocean Dumping; Correction of Typographical Error in 2006 Federal Register Final Rule for...

    Science.gov (United States)

    2010-06-15

    ... AGENCY 40 CFR Part 228 Ocean Dumping; Correction of Typographical Error in 2006 Federal Register Final... typographical error in the Final Rule for the Ocean Dumping; De-designation of Ocean Dredged Material Disposal... amended by revising paragraphs (n)(3) and (n)(4) to read as follows: Sec. 228.15 Dumping sites...

  14. 75 FR 36106 - Agency Information Collection Activities: Distribution of Continued Dumping and Subsidy Offset to...

    Science.gov (United States)

    2010-06-24

    ... Continued Dumping and Subsidy Offset to Affected Domestic Producers (CDSOA) AGENCY: U.S. Customs and Border...: Distribution of Continued Dumping and Subsidy Offset to Affected Domestic Procedures. This is a proposed.... Title: Distribution of Continued Dumping and Subsidy Offset to Affected Domestic Producers (CDSOA)....

  15. 77 FR 73732 - WTO Dispute Settlement Proceeding Regarding United States ; Countervailing and Anti-Dumping...

    Science.gov (United States)

    2012-12-11

    ... Regarding United States ; Countervailing and Anti-Dumping Measures on Certain Products From China AGENCY... countervailing and anti-dumping duty determinations and actions by the Department of Commerce, the U.S... application of anti-dumping and countervailing duties under the nonmarket economy methodology with respect...

  16. 76 FR 52045 - WTO Dispute Settlement Proceeding Regarding United States-Anti-Dumping Measures on Diamond...

    Science.gov (United States)

    2011-08-19

    ... TRADE REPRESENTATIVE WTO Dispute Settlement Proceeding Regarding United States--Anti- Dumping Measures... (``WTO Agreement'') concerning anti-dumping measures regarding diamond sawblades and parts thereof from... request dated February 28, 2001 regarding anti-dumping measures on certain frozen warmwater shrimp...

  17. Dumping syndrome after esophageal, gastric or bariatric surgery : pathophysiology, diagnosis, and management

    NARCIS (Netherlands)

    van Beek, A P; Emous, M; Laville, M; Tack, J

    2017-01-01

    BACKGROUND: Dumping syndrome, a common complication of esophageal, gastric or bariatric surgery, includes early and late dumping symptoms. Early dumping occurs within 1 h after eating, when rapid emptying of food into the small intestine triggers rapid fluid shifts into the intestinal lumen and rele

  18. 77 FR 19745 - WTO Dispute Settlement Proceeding Regarding United States; Anti-Dumping Measures on Certain...

    Science.gov (United States)

    2012-04-02

    ... TRADE REPRESENTATIVE WTO Dispute Settlement Proceeding Regarding United States; Anti- Dumping Measures... order would be likely to lead to the continuation or recurrence of dumping, Certain Frozen Warmwater... methodology for determining margins of dumping in administrative reviews; (8) the practice of...

  19. 7 CFR 58.228 - Dump hoppers, screens, mixers and conveyors.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Dump hoppers, screens, mixers and conveyors. 58.228... Service 1 Equipment and Utensils § 58.228 Dump hoppers, screens, mixers and conveyors. The product contact surfaces of dump hoppers, screens, mixers and conveyors which are used in the process of transferring...

  20. 40 CFR 256.64 - Requirements for public participation in the open dump inventory.

    Science.gov (United States)

    2010-07-01

    ... in the open dump inventory. 256.64 Section 256.64 Protection of Environment ENVIRONMENTAL PROTECTION... MANAGEMENT PLANS Public Participation § 256.64 Requirements for public participation in the open dump... classification of a facility as an open dump to the Federal Government. The State shall accomplish this...

  1. 75 FR 67968 - Arkwright Dump Site, Spartanburg, Spartanburg County, SC; Notice of Settlement

    Science.gov (United States)

    2010-11-04

    ...] Arkwright Dump Site, Spartanburg, Spartanburg County, SC; Notice of Settlement AGENCY: Environmental... Dump Site located in Spartanburg, Spartanburg County, South Carolina for publication. DATES: The Agency..., identified by Docket ID No. EPA-RO4- SFUND-2010-0892 or Site name Arkwright Dump Site by one of the...

  2. Image quality in double- and triple-intensity ghost imaging with classical partially polarized light

    CERN Document Server

    Kellock, Henri; Shirai, Tomohiro; Friberg, Ari T

    2012-01-01

    Classical ghost imaging is a correlation-imaging technique in which the image of the object is found through intensity correlations of light. We analyze three different quality parameters, namely the visibility, the signal-to-noise ratio (SNR), and the contrast-to-noise ratio (CNR), to assess the performance of double- and triple-intensity correlation-imaging setups. The source is a random partially polarized beam of light obeying Gaussian statistics and the image quality is evaluated as a function of the degree of polarization (DoP). We show that the visibility improves when the DoP and the order of imaging increase, while the SNR behaves oppositely. The CNR is for the most part independent of DoP and the imaging order. The results are important for the development of new imaging devices using partially polarized light.

  3. Instability of wormholes supported by a ghost scalar field: II. Nonlinear evolution

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez, J A; Guzman, F S; Sarbach, O [Instituto de Fisica y Matematicas, Universidad Michoacana de San Nicolas de Hidalgo, Edificio C-3, Cd. Universitaria, A P 2-82, 58040 Morelia, Michoacan (Mexico)

    2009-01-07

    We analyze the nonlinear evolution of spherically symmetric wormhole solutions coupled to a massless ghost scalar field using numerical methods. In a previous article, we have shown that static wormholes with these properties are unstable with respect to linear perturbations. Here, we show that depending on the initial perturbation the wormholes either expand or decay to a Schwarzschild black hole. We estimate the time scale of the expanding solutions and those collapsing to a black hole, and show that they are consistent in the regime of small perturbations with those predicted from perturbation theory. In the collapsing case, we also present a systematic study of the final black hole horizon and discuss the possibility for a luminous signal to travel from one universe to the other and back before the black hole forms. In the expanding case, the wormholes seem to undergo an exponential expansion, at least during the run time of our simulations.

  4. Pioneer vegetation on ash dumps in Oswiecim (southern Poland)

    Energy Technology Data Exchange (ETDEWEB)

    Bojarczuk, T.; Kuczynski, B.

    1972-01-01

    The authors found fifty-three plant species growing on the ash dumps in Oswiecim, while in 1963 twenty-two species only were encountered there. Most of the self-sown plants belong to calciphilous, ruderal and xerophilous species. The pH of the ashes amounts to 9.5. Some of them, e.g. Matricaria chamomilla are index plants for acid habitats; others were hitherto encountered in wet habitats, e.g. Rumex obtusifolias, Myricaria germanica, Epilobium roseum, and others. Their occurrence on ash dumps is possible thanks to the considerable amount of precipitation (465 mm) during the vegetative period. The mosses are the pioneers of these dumps, e.g. Funaria hygromertrica and Bryum argenteum, which usually appear on the site of fire. The authors are of the opinion that a better knowledge of the plants appearing spontaneously on dumps and waste heaps may provide many useful conclusions which will help to obtain positive results at the recultivation of spoil heaps and industrial wastes. 9 references, 3 tables.

  5. ALPtraum: ALP production in proton beam dump experiments

    CERN Document Server

    Döbrich, Babette; Kahlhoefer, Felix; Ringwald, Andreas; Schmidt-Hoberg, Kai

    2016-01-01

    With their high beam energy and intensity, existing and near-future proton beam dumps provide an excellent opportunity to search for new very weakly coupled particles in the MeV to GeV mass range. One particularly interesting example is a so-called axion-like particle (ALP), i.e. a pseudoscalar coupled to two photons. The challenge in proton beam dumps is to reliably calculate the production of the new particles from the interactions of two composite objects, the proton and the target atoms. In this work we argue that Primakoff production of ALPs proceeds in a momentum range where production rates and angular distributions can be determined to sufficient precision using simple electromagnetic form factors. Reanalysing past proton beam dump experiments for this production channel, we derive novel constraints on the parameter space for ALPs. We show that the NA62 experiment at CERN could probe unexplored parameter space by running in 'dump mode' for a few days and discuss opportunities for future experiments su...

  6. Environmental assessments of sea dumped chemical warfare agents

    DEFF Research Database (Denmark)

    Sanderson, Hans; Fauser, Patrik

    This is a report on the information gathered during work related to sea dumped chemical warfare agents. It mainly reviews the work conducted in relation to the installation of the two Nord Stream gas pipeline from 2008-2012. The focus was on the weight-of-evidence risk assessment of disturbed CWA...

  7. The LHC Beam Dumping System Trigger Synchronisation and Distribution System

    CERN Document Server

    Antoine, A; Voumard, N

    2005-01-01

    Two LHC beam dumping systems (LBDS) will fast-extract the counter-rotating beams safely from the LHC collider during setting-up of the accelerator, at the end of a physics run and in case of emergencies. They consist of 15 fast pulsed magnets per ring for beam extraction from the accelerator combined with 10 fast pulsed magnets for horizontal and vertical beam dilution. Dump requests will come from 3 different sources: the machine protection system for emergency cases, the machine timing system for scheduled dumps or the LBDS itself in case of internal failures. These spontaneously issued dump requests will be synchronised with the 3 µs beam abort gap within a fail-safe trigger synchronisation unit (TSU) based on a digital phase lock loop (DPLL) locked on the beam revolution frequency with a maximum phase error of 40 ns. Afterwards, the synchronised trigger pulse will be distributed to the fast pulsed magnet high voltage generators through a redundant fault tolerant trigger distribution system based on the...

  8. 29 BABY DUMPING AND EVOLVING BABY FACTORIES IN NIGERIA

    African Journals Online (AJOL)

    Few scholarly works existing on this social problem center on poverty .... their parents. Similarly, Sazali .... Table 5: Number of cases related to baby dumping in Malaysia ..... children from imminent risk of harm, as the nation's present commitment of resources, laws, and .... Stigma: Notes on Management of Spoiled Identity.

  9. Bilge dump detection from SAR imagery using local binary patterns

    CSIR Research Space (South Africa)

    Mdakane, LW

    2015-07-01

    Full Text Available 2015: Remote Sensing: Understanding the Earth for a Safer World, Milan, Italy, 26-31 July 2015 Bilge dump detection from SAR imagery using local binary patterns yz L.W. Mdakane,yz W. Kleynhans,yz C.P. Schwegmann yDepartment of Electrical...

  10. ALPtraum. ALP production in proton beam dump experiments

    Energy Technology Data Exchange (ETDEWEB)

    Doebrich, Babette [European Organization for Nuclear Research (CERN), Geneva (Switzerland); Jaeckel, Joerg [Heidelberg Univ. (Germany). Inst. fuer Theoretische Physik; Kahlhoefer, Felix; Ringwald, Andreas; Schmidt-Hoberg, Kai [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

    2015-12-15

    With their high beam energy and intensity, existing and near-future proton beam dumps provide an excellent opportunity to search for new very weakly coupled particles in the MeV to GeV mass range. One particularly interesting example is a so-called axion-like particle (ALP), i.e. a pseudoscalar coupled to two photons. The challenge in proton beam dumps is to reliably calculate the production of the new particles from the interactions of two composite objects, the proton and the target atoms. In this work we argue that Primakoff production of ALPs proceeds in a momentum range where production rates and angular distributions can be determined to sufficient precision using simple electromagnetic form factors. Reanalysing past proton beam dump experiments for this production channel, we derive novel constraints on the parameter space for ALPs. We show that the NA62 experiment at CERN could probe unexplored parameter space by running in 'dump mode' for a few days and discuss opportunities for future experiments such as SHiP.

  11. Results of evaluation of tailing dumps dust intensity

    Directory of Open Access Journals (Sweden)

    Masloboev V. A.

    2016-03-01

    Full Text Available A set of most acceptable and well-known methods of dust intensity evaluation has been defined and tested (dependence of Westphal D. L. et al. and DEAD scheme based on the analysis of exiting approaches (deserts, tailing dumps, etc.. The description of the chosen methods has been given. The determination of dynamic velocity u* and velocity at the height of +10 m above the dusting surface u10 which are necessary to evaluate the dust intensity has been demonstrated. The method is based on two-dimensional numerical model of atmosphere aerodynamics in the area of "tailing dumps of ANOF-2 ‒ the town of Apatity". The study provides calculations of horizontal velocity at the height of +10 m above the dusting surface at the wind speed varying from 5 to 23 m/sec. The work also suggests the results of graphical data processing related to tailing grain size distribution from the surface of the firmly established surface of the tailing dumps of ANOF-2. Comparative analysis has been given and the peculiarities of interval (based on grains sizes dust intensity of the tailing dumps of ANOF-2 have been shown using the dependence of Westphal D. L. et al. and DEAD scheme within the wind speed range. The received values of dust intensity at the lower range limit are close to the "maximum specific dust off" value which is used by project specialists for documentation development

  12. Calculation of New Beam Dump Shielding for CYCIAE-100

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The 100 MeV high intensity cyclotron, CYCIAE-100, places a demanding requirement on the collection device to accept the proton beam. According to the original design, the beam dump would be settled in the cyclotron vault. It uses pure aluminum as the target material,

  13. insect vectors of pathogens in selected undisposed refuse dumps in ...

    African Journals Online (AJOL)

    Administrator

    2012-06-23

    Jun 23, 2012 ... insects and their role in disease transmission are highlighted. Proper disposal of ... Keywords: Insects, refuse dumps, diseases, Kaduna, Nigeria. INTRODUCTION ..... further noted that at present, only individual solutions are used at the household .... to endemic cholera in Douala, Cameroon. PubMed. gov ( ...

  14. Particulate Matter and Noise Impact Studies of Waste Rock Dump*

    African Journals Online (AJOL)

    Michael

    2016-06-01

    Jun 1, 2016 ... pressure level modelling indicates that the waste rock dump has a potential to ... Problems related to noise include stress related illnesses, high blood pressure, speech ... modelling consist of physical parameters that are ... The monitoring activity was ... efficiency of 40% (assumed) will reduce the noise.

  15. Optical image hiding based on computational ghost imaging

    Science.gov (United States)

    Wang, Le; Zhao, Shengmei; Cheng, Weiwen; Gong, Longyan; Chen, Hanwu

    2016-05-01

    Imaging hiding schemes play important roles in now big data times. They provide copyright protections of digital images. In the paper, we propose a novel image hiding scheme based on computational ghost imaging to have strong robustness and high security. The watermark is encrypted with the configuration of a computational ghost imaging system, and the random speckle patterns compose a secret key. Least significant bit algorithm is adopted to embed the watermark and both the second-order correlation algorithm and the compressed sensing (CS) algorithm are used to extract the watermark. The experimental and simulation results show that the authorized users can get the watermark with the secret key. The watermark image could not be retrieved when the eavesdropping ratio is less than 45% with the second-order correlation algorithm, whereas it is less than 20% with the TVAL3 CS reconstructed algorithm. In addition, the proposed scheme is robust against the 'salt and pepper' noise and image cropping degradations.

  16. Capturing Moving Interfaces by Level Set Method with Ghost Technique

    Institute of Scientific and Technical Information of China (English)

    Wang Xueyao; Liu Shi; Liu Changchun; Jiang Fan; Li Zhihong; Ma Zhengzhong

    2007-01-01

    SMAC method is adopted to solve Navier-Stokes equations, by using fifth-order WENO scheme and TVD R-K scheme, LevelSet methods are used to capture moving interfaces with improved Ghost techniques. Some examples, e.g. the incompressible inviscid flame interfaces of one and two dimensions and the rising-merging of oil bubbles in water, are computed and the comparison with the result of commercial CFD software Fluent has been done. The rationality of LevelSet methods with Ghost technique in capturing moving interfaces with jump conditions is affirmed. It is shown that Level Set method can capture interfaces sharply without complicated reconstruction and can be easily programmed.

  17. Use of the Location Inverse Solution to Reduce Ghost Images

    Directory of Open Access Journals (Sweden)

    Hu Yong-Zhong

    2010-01-01

    Full Text Available Through-the-wall imaging (TWI is a difficult but important task for both law enforcement and military missions. Acquiring information on both the internal features of a structure and the location of people inside plays an important role in many fields such as antiterrorism, hostage search and rescue, and barricade situations. Up to now, a number of promising experimental systems have been developed to validate and evaluate diverse imaging methods, most of which are based on a linear antenna array to obtain an image of the objects. However, these methods typically use the backward projection (BP algorithm based on ellipse curves, which usually generates additional ghost images. In this paper, the algorithm using the location inverse solution (LIS to reduce the ghost images is proposed and simulated. The results of simulation show that this approach is feasible.

  18. Use of the Location Inverse Solution to Reduce Ghost Images

    Directory of Open Access Journals (Sweden)

    Yong-Zhong Hu

    2010-01-01

    Full Text Available Through-the-wall imaging (TWI is a difficult but important task for both law enforcement and military missions. Acquiring information on both the internal features of a structure and the location of people inside plays an important role in many fields such as antiterrorism, hostage search and rescue, and barricade situations. Up to now, a number of promising experimental systems have been developed to validate and evaluate diverse imaging methods, most of which are based on a linear antenna array to obtain an image of the objects. However, these methods typically use the backward projection (BP algorithm based on ellipse curves, which usually generates additional ghost images. In this paper, the algorithm using the location inverse solution (LIS to reduce the ghost images is proposed and simulated. The results of simulation show that this approach is feasible.

  19. Tackling Higher Derivative Ghosts with the Euclidean Path Integral

    CERN Document Server

    Fontanini, Michele

    2011-01-01

    An alternative to the effective field theory approach to treat ghosts in higher derivative theories is to attempt to integrate them out via the Euclidean path integral formalism. It has been suggested that this method could provide a consistent framework within which we might tolerate the ghost degrees of freedom that plague, among other theories, the higher derivative gravity models that have been proposed to explain cosmic acceleration. We consider the extension of this idea to treating a class of terms with order six derivatives, and find that for a general term the Euclidean path integral approach works in the most trivial background, Minkowski. Moreover we see that even in de Sitter background, despite some difficulties, it is possible to define a probability distribution for tensorial perturbations of the metric.

  20. Phantom dark ghost in Einstein-Cartan gravity

    Science.gov (United States)

    Chang, Yu-Chiao; Bouhmadi-López, Mariam; Chen, Pisin

    2017-05-01

    A class of dynamical dark energy models is constructed through an extended version of fermion fields corresponding to phantom dark ghost spinors, which are spin 1/2 with mass dimension 1. We find that if these spinors interact with torsion fields in a homogeneous and isotropic universe, then it does not imply any future dark energy singularity or any abrupt event, though the fermion has a negative kinetic energy. In fact, the equation of state of this dark energy model will asymptotically approach the value w=-1 from above without crossing the phantom divide and inducing therefore a de Sitter state. Consequently, we expect the model to be stable because no real phantom fields will be created. At late time, the torsion fields will vanish as the corresponding phantom dark ghost spinors dilute. As would be expected, intuitively, this result is unaffected by the presence of cold dark matter although the proof is not as straightforward as in general relativity.

  1. Use of the Location Inverse Solution to Reduce Ghost Images

    Science.gov (United States)

    Hu, Yong-Zhong; Li, Ting-Jun; Zhou, Zheng-Ou

    2009-12-01

    Through-the-wall imaging (TWI) is a difficult but important task for both law enforcement and military missions. Acquiring information on both the internal features of a structure and the location of people inside plays an important role in many fields such as antiterrorism, hostage search and rescue, and barricade situations. Up to now, a number of promising experimental systems have been developed to validate and evaluate diverse imaging methods, most of which are based on a linear antenna array to obtain an image of the objects. However, these methods typically use the backward projection (BP) algorithm based on ellipse curves, which usually generates additional ghost images. In this paper, the algorithm using the location inverse solution (LIS) to reduce the ghost images is proposed and simulated. The results of simulation show that this approach is feasible.

  2. Coulomb gauge ghost propagator and the Coulomb form factor

    CERN Document Server

    Quandt, M; Chimchinda, S; Reinhardt, H

    2008-01-01

    The ghost propagator and the Coulomb potential are evaluated in Coulomb gauge on the lattice, using an improved gauge fixing scheme which includes the residual symmetry. This setting has been shown to be essential in order to explain the scaling violations in the instantaneous gluon propagator. We find that both the ghost propagator and the Coulomb potential are insensitive to the Gribov problem or the details of the residual gauge fixing, even if the Coulomb potential is evaluated from the A0--propagator instead of the Coulomb kernel. In particular, no signs of scaling violations could be found in either quantity, at least to well below the numerical accuracy where these violations were visible for the gluon propagator. The Coulomb potential from the A0-propagator is shown to be in qualitative agreement with the (formally equivalent) expression evaluated from the Coulomb kernel.

  3. Coulomb gauge ghost propagator and the Coulomb form factor

    Science.gov (United States)

    Quandt, M.; Burgio, G.; Chimchinda, S.; Reinhardt, H.

    The ghost propagator and the Coulomb potential are evaluated in Coulomb gauge on the lattice, using an improved gauge fixing scheme which includes the residual symmetry. This setting has been shown to be essential in order to explain the scaling violations in the instantaneous gluon propagator. We find that both the ghost propagator and the Coulomb potential are insensitive to the Gribov problem or the details of the residual gauge fixing, even if the Coulomb potential is evaluated from the A0 -propagator instead of the Coulomb kernel. In particular, no signs of scaling violations could be found in either quantity, at least to well below the numerical accuracy where these violations were visible for the gluon propagator. The Coulomb potential from the A0 -propagator is shown to be in qualitative agreement with the (formally equivalent) expression evaluated from the Coulomb kernel.

  4. Light sgoldstino's interactions analysis and prospects for potential discovery in electron beam dump experiment at CERN SPS

    OpenAIRE

    Astapov, K. O.; Kirpichnikov, D. V.

    2016-01-01

    In the present paper we have discussed light sgoldstino in context of MSSM model. We have analyzed couplings of scalar sgoldstino to SM particles, namely to photons, $Z^0$ bosons, leptons and quarks. We also took into account the impact on those interactions of the admixture of lightest MSSM Higgs scalar in the sgoldstino state. The signal rate of rare decays at CERN electron beam dump experiment NA64 for the scalar sgoldstino has been estimated. Expected signal rate allowed us to exclude som...

  5. Bianchi type I Universe and interacting ghost scalar fields models of dark energy

    Science.gov (United States)

    Hossienkhani, H.

    2016-04-01

    We suggest a correspondence between interacting ghost dark energy model with the quintessence, tachyon and K-essence scalar field in a non-isotropic universe. This correspondence allows to reconstruct the potential and the dynamics for the scalar field of the interacting ghost dark energy model, which describe accelerated expansion of the universe. Our numerical result show the effects of the interaction and anisotropic on the evolutionary behavior the ghost scalar field models.

  6. A FAST CONVERGING SPARSE RECONSTRUCTION ALGORITHM IN GHOST IMAGING

    Institute of Scientific and Technical Information of China (English)

    Li Enrong; Chen Mingliang; Gong Wenlin; Wang Hui; Han Shensheng

    2012-01-01

    A fast converging sparse reconstruction algorithm in ghost imaging is presented.It utilizes total variation regularization and its formulation is based on the Karush-Kuhn-Tucker (KKT) theorem in the theory of convex optimization.Tests using experimental data show that,compared with the algorithm of Gradient Projection for Sparse Reconstruction (GPSR),the proposed algorithm yields better results with less computation work.

  7. ``Thatcher's Ghost'': Confirmation of the ν Cygnids (NCY, IAU #409)

    Science.gov (United States)

    Jenniskens, Peter; Haberman, Bob

    2013-06-01

    A ghostly image of meteor radiants appeared in the CAMS data north-east of the Lyrids on April 22, 2012. The diffuse shower is identified as the ν Cygnids (NCY). It is weakly active from April 17 to 26, and likely related to the April ρ Cygnids (ARC), active in the area after April 27. The ν Cygnids may have been in outburst in 2012, because this shower was not as evident in the 2007-2011 SonotaCo data.

  8. Carcinoma arising in a dentinogenic ghost cell tumor.

    Science.gov (United States)

    McCoy, B P; O Carroll, M K; Hall, J M

    1992-09-01

    A 13-year-old black girl was referred for evaluation of a nonhealing extraction site of 2 years' duration. Radiographs revealed a large, irregularly shaped, mixed radiolucent/radiopaque lesion that occupied almost the entire left area of the maxilla and crossed the midline. Microscopic examination revealed irregular dentinoid material with odontogenic epithelium that exhibited ghost cell keratinization and anaplastic changes. The patient underwent a hemimaxillectomy, and 7 years after surgery she appears to be free of disease.

  9. The Ghost Of Herzberg Motivational Theory: Motivators And Demotivators

    OpenAIRE

    Pupavac, Drago

    2015-01-01

    Managers tend to sense, that many employees could do more. The question is: What can we do to influence them to contribute more than job description reguqires? Herzberg answer it, but his Two-Factor Theory has not received strong support in the literature. Accordingly, the basic objective of this scientific debate is to examine the relevance Herzberg motivation theory in terms of the new work economy. Scientific research methods applied in confirming the working hypothesis about the ghost of ...

  10. An introduction to ghost imaging: quantum and classical.

    Science.gov (United States)

    Padgett, Miles J; Boyd, Robert W

    2017-08-06

    Ghost imaging has been a subject of interest to the quantum optics community for the past 20 years. Initially seen as manifestation of quantum spookiness, it is now recognized as being implementable in both single- and many-photon number regimes. Beyond its scientific curiosity, it is now feeding novel imaging modalities potentially offering performance attributes that traditional approaches cannot match.This article is part of the themed issue 'Quantum technology for the 21st century'. © 2017 The Author(s).

  11. Ghost free massive gravity with singular reference metrics

    Science.gov (United States)

    Zhang, Hongsheng; Li, Xin-Zhou

    2016-06-01

    An auxiliary metric (reference metric) is inevitable in massive gravity theory. In the scenario of the gauge/gravity duality, massive gravity with a singular reference metric is used to study momentum dissipation, which describes the electric and heat conductivity for normal conductors. We demonstrate in detail that the de Rham-Gabadadze-Tolley (dRGT) massive gravity with a singular reference metric is ghost free.

  12. Assessing pollutions of soil and plant by municipal waste dump

    Science.gov (United States)

    Liu, Changli; Zhang, Yun; Zhang, Feng'e.; Zhang, Sheng; Yin, Miying; Ye, Hao; Hou, Hongbing; Dong, Hua; Zhang, Ming; Jiang, Jianmei; Pei, Lixin

    2007-04-01

    Research is few in the literature regarding the investigation and assessment of pollutions of soil and plant by municipal waste dumps. Based upon previous work in seven waste dumping sites (nonsanitary landfills) in Beijing, Shanghai and Shijiazhuang, this study expounds the investigation and assessment method and report major pollutants. Using relative background values, this study assesses soil pollution degree in the seven dumping sites. Preliminary conclusions are: (1) pollution degrees are moderate or heavy; (2) pollution distance by domestic waste that is dumped on a plane ground is 85 m; (3) the horizontal transport distance of pollutants might be up to 120 m if waste leachates are directly connected with water in saturated soils; (4) vertical transport depth is about 3 m in unsaturated silty clayey soils. Furthermore, using relative background values and hygiene standards of food and vegetable this study assesses the pollutions of different parts of reed, sorghum, watermelon and sweet-melon. It is found: (1) in comparison with the relative background values in a large distance to the waste dumping sites, domestic wastes have polluted the roots and stems of reed and sorghum, whereas fine coal ash has polluted the leaves, rattans and fruits of watermelon and sweet-melon; (2) domestic wastes and fine coal ash have heavily polluted the edible parts of sorghum, water melon and sweet-melon. As, Hg, Pb and F have far exceeded standard values, e.g., Hg has exceeded the standard value by up to 650 1,700 times and Cd by 120 275 times, and the comprehensive pollution index is up to 192.9 369.7; (3) the polluted sorghum, watermelon and sweet-melon are inedible.

  13. Understanding Nanocalcification: A Role Suggested for Crystal Ghosts

    Directory of Open Access Journals (Sweden)

    Ermanno Bonucci

    2014-07-01

    Full Text Available The present survey deals with the initial stage of the calcification process in bone and other hard tissues, with special reference to the organic-inorganic relationship and the transformation that the early inorganic particles undergo as the process moves towards completion. Electron microscope studies clearly exclude the possibility that these particles might be crystalline structures, as often believed, by showing that they are, instead, organic-inorganic hybrids, each comprising a filamentous organic component (the crystal ghost made up of acidic proteins. The hypothesis is suggested that the crystal ghosts bind and stabilize amorphous calcium phosphate and that their subsequent degradation allows the calcium phosphate, once released, to acquire a hydroxyapatite, crystal-like organization. A conclusive view of the mechanism of biological calcification cannot yet be proposed; even so, however, the role of crystal ghosts as a template of the structures usually called “crystallites” is a concept that has gathered increasing support and can no longer be disregarded.

  14. Layer-by-layer microcapsules templated on erythrocyte ghost carriers.

    Science.gov (United States)

    Shaillender, Mutukumaraswamy; Luo, Rongcong; Venkatraman, Subbu S; Neu, Björn

    2011-08-30

    This work reports the fabrication of layer-by-layer (LbL) microcapsules that provide a simple mean for controlling the burst and subsequent release of bioactive agents. Red blood cell (RBC) ghosts were loaded with fluorescently labeled dextran and lysozyme as model compounds via hypotonic dialysis with an encapsulation efficiency of 27-31%. It is demonstrated that these vesicles maintain their shape and integrity and that a uniform distribution of the encapsulated agents within these carriers is achieved. The loaded vesicles were then successfully coated with the biocompatible polyelectrolytes, poly-L-arginine hydrochloride and dextran sulfate. It is demonstrated that the release profiles of the encapsulated molecules can be regulated over a wide range by adjusting the number of polyelectrolyte layers. In addition, the LbL shell also protects the RBC ghost from decomposition thereby potentially preserving the bioactivity of encapsulated drugs or proteins. These microcapsules, consisting of an RBC ghost coated with a polyelectrolyte multilayer, provide a simple mean for the preparation of loaded LbL microcapsules eliminating the core dissolution and post-loading of bioactive agents, which are required for conventional LbL microcapsules.

  15. Physicochemical characterization of artificial nanoerythrosomes derived from erythrocyte ghost membranes.

    Science.gov (United States)

    Deák, Róbert; Mihály, Judith; Szigyártó, Imola Cs; Wacha, András; Lelkes, Gábor; Bóta, Attila

    2015-11-01

    Colloidal stabile nanoerythrosomes with 200 nm average diameter were formed from hemoglobin-free erythrocyte ghost membrane via sonication and membrane extrusion. The incorporation of extra lipid (1,2-dipalmitoyl-sn-glycero-3-phosphocholine, DPPC), added to the sonicated ghosts, caused significant changes in the thermotropic character of the original membranes. As a result of the increased DPPC ratio the chain melting of the hydrated DPPC system and the characteristic small angle X-ray scattering (SAXS) of the lipid bilayers appeared. Significant morphological changes were followed by transmission electron microscopy combined with freeze fracture method (FF-TEM). After the ultrasonic treatment the large entities of erythrocyte ghosts transformed into nearly spherical nanoerythrosomes with diameters between 100 and 300 nm and at the same time a great number of 10-30 nm large membrane proteins or protein clusters were dispersed in the aqueous medium. The infrared spectroscopy (FT-IR) pointed out, that the sonication did not cause changes in the secondary structures of the membrane proteins under our preparation conditions. About fivefold of extra lipid--compared to the lipid content of the original membrane--caused homogeneous dispersion of nanoerythrosomes however the shape of the vesicles was not uniform. After the addition of about tenfold of DPPC, monoform and monodisperse nanoerythrosomes became typical. The outer surfaces of these roughly spherical objects were frequently polygonal, consisting of a net of pentagons and hexagons.

  16. Radiation from an emitter in the ghost free scalar theory

    CERN Document Server

    Frolov, Valeri P

    2016-01-01

    We study radiation emitted by a time-dependent source of a scalar massless field in the framework of the ghost-free modifications of the theory. We consider a simple model of the emitter: namely,we assume that it is point-like and monochromatic. We focused on the most common versions of the ghost-free theory, where the propagator $\\Box^{-1}$ is modified as follows $\\exp(-(\\Box/\\mu^2)^N) \\Box^{-1}$, where $\\mu$ is the characteristic mass-scale of such $GF_N$-theory. We demonstrated that far from the source, in the wave-zone, the radiation asymptotically converges to its "classical" value for any $N\\ge 1$. However, in the near-zone the behavior of the field is quite different from the "classical" case. The difference of field amplitude for the ghost-free field and for the classical one has an oscillatory behavior in this domain. A number of oscillations increases with $N$. The amplitude of these oscillations remain finite for even $N$, while it infinitely grows with frequency for odd $N$. This behavior indicate...

  17. States of non-zero ghost number in $c<1$ matter coupled to 2d gravity

    CERN Document Server

    Govindarajan, S; John, V; Majumdar, P

    1992-01-01

    We study $c<1$ matter coupled to gravity in the Coulomb gas formalism using the double cohomology of the string BRST and Felder BRST charges. We find that states outside the primary conformal grid are related to the states of non-zero ghost number by means of descent equations given by the double cohomology. Some aspects of the Virasoro structure of the Liouville Fock space are studied. As a consequence, states of non-zero ghost number are easily constructed by ``solving'' these descent equations. This enables us to map ghost number conserving correlation functions involving non-zero ghost number states into those involving states outside the primary conformal grid.

  18. Factors Affecting "Ghosting" In Time-Multiplexed Piano-Stereoscopic Crt Display Systems

    Science.gov (United States)

    Lipton, Lenny

    1987-06-01

    Two factors contributing to "ghosting" (image doubling) in plano-stereoscopic CRT displays are phosphor decay and dynamic range of the shutters. A ghosting threshold must be crossed before comfortable fusion can take place. The ghosting threshold changes as image brightness increases and with higher-contrast subjects and those with larger parallax values. Because of the defects of existing liquid crystal shutters, we developed a liquid-crystal shutter with high dynamic range, good transmission, and high speed. With these shutters, residual ghosting is a result of phosphor persistence.

  19. Stability of Erythrocyte Ghosts: A γ -Ray Perturbed Angular Correlation Study

    Science.gov (United States)

    Kruse, Carol A.; Tin, George W.; Baldeschwieler, John D.

    1983-03-01

    The structural integrity of erythrocyte ghosts made by the preswell and slow-dialysis techniques has been studied in vitro by use of γ -ray perturbed angular correlation (PAC) techniques and also by standard in vitro leakage methods employing sequestered labeled markers. Complexes of 111In3+ and nitrilotriacetate were encapsulated in ghosts made from human, rabbit, rat, and mouse erythrocytes, and their leakage was monitored by both methods. In addition, 125I-labeled bovine serum albumin was encapsulated, and ghost integrity was monitored by conventional leakage measurements. With the PAC technique the percentage of material released from human ghosts was determined quantitatively, and the results were equivalent to those obtained by the conventional method. In addition, at various times after intravenous injection, tissue distribution of the ghosts in the mouse was studied. The percent injected dose per gram of tissue of the labeled surface proteins of erythrocyte ghosts in circulation approximated that of the entrapped labeled albumin. This suggests that the ghost membrane and contents are strongly associated in vivo. Large 125I-labeled bovine serum albumin molecules and small 111In3+-nitrilotriacetate complexes were delivered in high quantities to the lung initially, and to the liver and spleen. Because erythrocyte ghosts have the ability to entrap a wide range of substances and deliver them to specific organs, ghosts may be preferable to other drug carriers or drug therapy for treatment of certain disorders.

  20. Research of waste dump water mutagenicity of bacterial detection system SOS chromotest.

    Science.gov (United States)

    Vojtková, H; Janáková, I

    2011-01-01

    The paper deals with a possible use of the bacterial detection system of SOS chromotest to test mutagenicity of waste dump water checking the mutagenicity degree on real samples from Praksice waste dump, which is a controlled waste dump with mixed industrial, municipal and inert wastes. The waste dump surface water samples were taken from a no-name influent stream springing below the waste dump body between 2005 and 2009. After metabolic activation by microsomal fraction in vitro, medium to high mutagenicity was registered in all the samples. The SOS chromotest is assessed as an effective and economically acceptable method to check and determine the mutagenicity degree of contaminated water.

  1. Design of an internal waste dump within the boundaries of the open pit

    OpenAIRE

    Panov, Zoran; Minov, Kirco; Karanakova Stefanovska, Radmila; Stojanov, Slobodan; Doneva, Blagica

    2011-01-01

    With the deepening of the open pit, the transport distances for the sterile mass and the ore increased. This paper deals with the formation of an internal waste dump within the boundaries of the open pit. The development of such waste dump should be in function of the space for disposing the waste according to existing situation on the field and the space for dumping. The internal waste dump will be used for permanent dumping and waste storage. Modern methods will be used to asses...

  2. Prompt neutrino production in the 1982 beam dump experiment at CERN

    CERN Document Server

    Bostock, Paul

    Principles of beam dump experiments are reviewed and the 1982 beam dump at CERN using the Big European Bubble Chamber is described in detail. Neutrino events have been detected using both the bubble chamber and its associated electronic detectors. Prompt event rates are established for Vμ , Ṽμ , Ve and Ṽe . The prompt rates are consistent with lepton universality. The charm production cross-section required to explain the prompt electron-(anti)neutrino signal is approximately 16-105/μb per nucleon, assuming linear dependence of this cross-section on nucleon number. This range of values reflects the fact that we have not been able to find a model which is consistent with all aspects of the data. The neutral to charged current ratio for electron-neutrinos is found to be 0.23 ±0.16. The expected number of tau-neutrino events is estimated and kinematic and visual searches for tau-neutrino interactions are described. One visually detected candidate is described in detail. No positive evidence for a tau-ne...

  3. The Beam Energy Tracking System of the LHC Beam Dumping System

    CERN Document Server

    Barlow, R A; Carlier, E; Gräwer, G; Voumard, N; Gjelsvik, R

    2005-01-01

    The LHC Beam Dumping System (LBDS) of the Large Hadron Collider (LHC), presently under construction at CERN, will be installed around the straight section 6. It comprises per ring 15 horizontally deflecting extraction kickers, followed by 1 quadrupole, 15 vertically deflecting steel septum magnets, 10 dilution kickers and, in a separate cavern several hundred meters away, an external absorber assembly. A beam dump request can occur at any moment during the operation of the collider, from injection at 450 GeV up to top energy at 7 TeV. The Beam Energy Tracking System (BETS) monitors the deflection strength of each active element of the LBDS with respect to the beam energy in order to guarantee the correct extraction trajectory over the complete operational range and under all operational conditions. Its main functions are the acquisition of the beam energy, the generation of the kick strength reference signals for the extraction and dilution kickers, the continuous checking that the kicker high voltage generat...

  4. A ghost story: spatio-temporal response characteristics of an indirect-detection flat-panel imager.

    Science.gov (United States)

    Siewerdsen, J H; Jaffray, D A

    1999-08-01

    Spatial and temporal imaging characteristics of an amorphous silicon flat-panel imager (FPI) were investigated in terms relevant to the application of such devices in cone-beam computed tomography (CBCT) and other x-ray imaging modalities, including general radiography, fluoroscopy, mammography, radiotherapy portal imaging, and nondestructive testing. Specifically, issues of image lag (including the magnitude, spatial uniformity, temporal-frequency characteristics, and dependence upon exposure and frame time) and long-term image persistence ("ghosts") were investigated. As part of the basic characterization of the FPI, pixel dark signal and noise (magnitude, temporal stability, and spatial uniformity) as well as radiation response (signal size, linearity, gain, and reciprocity) were also measured. Image lag was analyzed as a function of frame time and incident exposure. First-frame lag (i.e., the relative residual signal in the first frame following readout of an exposure) was approximately 2-10%, depending upon incident exposure and was spatially nonuniform to a slight degree across the FPI; second-, third-, and fourth-frame lag were approximately 0.7%, 0.4%, and 0.3%, respectively (at 25% sensor saturation). Image lag was also analyzed in terms of the temporal-frequency-dependent transfer function derived from the radiation response, allowing a quantitative description of system components contributing to lag. Finally, the contrast of objects as a function of time following an exposure was measured in order to examine long-term image persistence ("ghosts"). Ghosts were found to persist up to 30 min or longer, depending upon the exposure and frame time. Two means of reducing the apparent contrast of ghost images were tested: (i) rapid scanning of the FPI at maximum frame rate, and (ii) flood-field exposure of the FPI; neither was entirely satisfactory. These results pose important considerations for application of FPIs in CBCT as well as other x-ray imaging

  5. Enhancement of resistance against high energy laser pulse injection with chevron beam dump

    Energy Technology Data Exchange (ETDEWEB)

    Yatsuka, Eiichi; Hatae, Takaki [Japan Atomic Energy Agency, Mukoyama, Naka, Ibaraki 311-0193 (Japan); Bassan, Michele; Vayakis, George; Walsh, Michael [ITER Organization, St Paul Lez Durance Cedex, Provence 13067 (France); Itami, Kiyoshi [Japan Atomic Energy Agency, Mukoyama, Naka, Ibaraki 311-0193 (Japan)

    2015-11-15

    Highlights: • The laser irradiation tests onto flat-mirror-molybdenum sample were carried out. • The absorbed energy density is the correct figure of the laser-induced damage. • Experiments validated the design of a new beam dump called chevron beam dump. • The chevron beam dump would have much longer lifetime than conventional beam dumps. - Abstract: The laser beam dump of the Edge Thomson scattering (ETS) in ITER is being developed and a new type of beam dump called the chevron beam dump was proposed recently. The laser-induced damage on the surface is one of the most severe issues to be overcome. The key concept of the chevron beam dump is to reduce the laser energy absorption per unit area and to absorb the laser beam gradually. The laser irradiation tests onto flat-mirror-molybdenum sample were carried out. It was clarified that the absorbed (rather than incident) energy density of the laser pulses should be the correct figure of merit for the laser-induced damage. Therefore, the concept of the chevron beam dump design, that minimizes the absorbed laser energy density per unit area, was validated experimentally. The chevron beam dump enables us to extend its lifetime drastically relative to conventional beam dumps. Potential methods to improve the laser-induced damage threshold (LIDT) are also discussed in this paper.

  6. A GIS-based zoning of illegal dumping potential for efficient surveillance.

    Science.gov (United States)

    Tasaki, Tomohiro; Kawahata, Takatsune; Osako, Masahiro; Matsui, Yasuhiro; Takagishi, Susumu; Morita, Akihiro; Akishima, Shigeki

    2007-01-01

    To assist in the efficient surveillance against illegal dumping, this study examined and evaluated two methods to illustrate the illegal dumping potential of sites using GIS (Geographic Information System) data. One approach focused on the occurrence of illegal dumping sites; the other on the size of the illegal dumping. Both approaches to zoning were implemented for the Kanto region of Japan, utilizing seven or eight major geographical attributes most closely related to illegal dumping. The zoning results revealed the areas requiring patrols against illegal dumping. Evaluation of the zoning results using the ROC (Receiver Operating Characteristic) curve showed the number of illegal dumping sites detectable under certain surveillance conditions and that the size-based zoning was superior, but this superiority was insignificant for revealing sites with higher potential for large illegal dumping, for which it would be sufficient to use the occurrence-based zoning. The evaluation also showed the contribution of each geographical attribute. Finally, application of the ROC curve to the surveillance planning process was examined, which enables the total social cost of pollution by illegal dumping, rehabilitation of dumping sites, and illegal dumping surveillance to be minimized.

  7. Ghost in the time series: no planet for Alpha Cen B

    CERN Document Server

    Rajpaul, Vinesh; Roberts, Stephen J

    2015-01-01

    We re-analyse the publicly available radial velocity (RV) measurements for Alpha Cen B, a star hosting an Earth-mass planet candidate, Alpha Cen Bb, with 3.24 day orbital period. We demonstrate that the 3.24 d signal observed in the Alpha Cen B data almost certainly arises from the window function (time sampling) of the original data. We show that when stellar activity signals are removed from the RV variations, other significant peaks in the power spectrum of the window function are coincidentally suppressed, leaving behind a spurious yet apparently-significant 'ghost' of a signal that was present in the window function's power spectrum to begin with. Even when fitting synthetic data with time sampling identical to the original data, but devoid of any genuine periodicities close to that of the planet candidate, the original model used to infer the presence of Alpha Cen Bb leads to identical conclusions: viz., the 3$\\sigma$ detection of a half-a-metre-per-second signal with 3.236 day period. Our analysis unde...

  8. Sea-dumped chemical weapons: environmental risk, occupational hazard.

    Science.gov (United States)

    Greenberg, M I; Sexton, K J; Vearrier, D

    2016-01-01

    Chemical weapons dumped into the ocean for disposal in the twentieth century pose a continuing environmental and human health risk. In this review we discuss locations, quantity, and types of sea-dumped chemical weapons, related environmental concerns, and human encounters with sea-dumped chemical weapons. We utilized the Ovid (http://ovidsp.tx.ovid.com) and PubMed (http://www.pubmed.org) search engines to perform MEDLINE searches for the terms 'sea-dumped chemical weapons', 'chemical warfare agents', and 'chemical munitions'. The searches returned 5863 articles. Irrelevant and non-English articles were excluded. A review of the references for these articles yielded additional relevant sources, with a total of 64 peer-reviewed articles cited in this paper. History and geography of chemical weapons dumping at sea: Hundreds of thousands of tons of chemical munitions were disposed off at sea following World War II. European, Russian, Japanese, and United States coasts are the areas most affected worldwide. Several areas in the Baltic and North Seas suffered concentrated large levels of dumping, and these appear to be the world's most studied chemical warfare agent marine dumping areas. Chemical warfare agents: Sulfur mustard, Lewisite, and the nerve agents appear to be the chemical warfare agents most frequently disposed off at sea. Multiple other type of agents including organoarsenicals, blood agents, choking agents, and lacrimators were dumped at sea, although in lesser volumes. Environmental concerns: Numerous geohydrologic variables contribute to the rate of release of chemical agents from their original casings, leading to difficult and inexact modeling of risk of release into seawater. Sulfur mustard and the organoarsenicals are the most environmentally persistent dumped chemical agents. Sulfur mustard in particular has a propensity to form a solid or semi-solid lump with a polymer coating of breakdown products, and can persist in this state on the ocean floor

  9. New strategies for combination vaccines based on the extended recombinant bacterial ghost system.

    Science.gov (United States)

    Eko, F O; Witte, A; Huter, V; Kuen, B; Fürst-Ladani, S; Haslberger, A; Katinger, A; Hensel, A; Szostak, M P; Resch, S; Mader, H; Raza, P; Brand, E; Marchart, J; Jechlinger, W; Haidinger, W; Lubitz, W

    1999-03-26

    Controlled expression of cloned PhiX174 gene E in Gram-negative bacteria results in lysis of the bacteria by formation of an E-specific transmembrane tunnel structure built through the cell envelope complex. Bacterial ghosts have been produced from a great variety of bacteria and are used as non-living candidate vaccines. In the recombinant ghost system, foreign proteins are attached on the inside of the inner membrane as fusions with specific anchor sequences. Ghosts have a sealed periplasmic space and the export of proteins into this space vastly extents the capacity of ghosts or recombinant ghosts to function as carriers of foreign antigens, immunomodulators or other substances. In addition, S-layer proteins forming shell-like self assembly structures can be expressed in bacterial candidate vaccine strains prior to E-mediated lysis. Such recombinant S-layer proteins carrying inserts of foreign epitopes of up to 600 amino acids within the flexible surface loop areas of the S-layer further extend the possibilities of ghosts as carriers of foreign epitopes. As ghosts do not need the addition of adjuvants to induce immunity in experimental animals they can also be used as carriers or targeting vehicles or as adjuvants in combination with subunit vaccines. Matrixes like dextran which can be used to fill the internal lumen of ghosts can be substituted with various ligands to bind the subunit or other materials of interest. Oral, aerogenic or parenteral immunization of experimental animals with recombinant ghosts induced specific humoral and cellular immune responses against bacterial and target components including protective mucosal immunity. The most relevant advantage of ghosts and recombinant bacterial ghosts as immunogens is that no inactivation procedures that denature relevant immunogenic determinants are employed in the production of ghosts. This fact explains the superior quality of ghosts when compared to other inactivated vaccines. As carriers of foreign

  10. Beam dumps design and local radiation protection at TERA synchrotron.

    Science.gov (United States)

    Porta, A; Campi, F; Agosteo, S

    2005-01-01

    The realisation of the National Center of Hadrontherapy was funded by the Italian Government in 2002. The Centre will be built in the area of Pavia (Italy). The synchrotron designed in the framework of this programme will accelerate protons and carbon ions up to 250 MeV and 400 MeV u(-1), respectively. Some of the main aspects which were taken into account in the design of the acceleration system are the patient's safety and the beam control. From this point of view an important role is played by the beam dumps in the synchrotron ring and upstream of the extraction system. In particular, an horizontal and a vertical beam dump will be installed in the synchrotron ring: the former will be used for lowering the beam intensity and the latter for beam abortion. The dump at the extraction will absorb the particles during the mounting and the falling ramps of the synchrotron magnetic cycle, thus extracting only the flat top of the ion spill. Beam dumps can produce intense fields of secondary radiation (neutrons, charged light-hadrons and photons) and high rates of induced activity, since they can absorb the beam completely. Usually they have to be shielded to protect the electronics during machine operation and to attenuate the radiation dose below the limits imposed by the law when the personnel access to the synchrotron hall. The part of the shielding design of the beam dumps concerning with the acceleration of protons was made using Monte Carlo simulations with the FLUKA code. Both induced activity and secondary radiation were taken into account. The shields against secondary radiation produced by carbon ions were designed, referring only to secondary neutrons, taking double-differential distributions from the literature as sources for the FLUKA simulations. The induced activity from carbon ions interactions was estimated analytically, using the data generated by the EPAX 2 code. The dose-equivalent rates from the induced radionuclides were calculated at 1 m from the

  11. Influence of preparative procedures on the membrane viscoelasticity of human red cell ghosts.

    Science.gov (United States)

    Nash, G B; Tran-Son-Tay, R; Meiselman, H J

    1986-02-13

    The effects of systematic variations in the preparative procedures on the membrane viscoelastic properties of resealed human red blood cell ghosts have been investigated. Ghosts, prepared by hypotonic lysis at 0 degrees C and resealing at 37 degrees C, were subjected to: measurement of the time constant for extensional recovery (tc); measurement of the membrane shear elastic modulus (mu) via three separate techniques; determination of the membrane viscosity (eta m) via a cone-plate Rheoscope. Membrane viscosity was also determined as eta m = mu X tc. Compared to intact cells, ghosts had shorter tc, regardless of their residual hemoglobin concentration (up to 21.6 g/dl). However, prolonged exposure to hypotonic media did increase their recovery time toward the intact cell value. The shear elastic modulus, as judged by micropipette aspiration of membrane tongues (mu p), was similar for all ghosts and intact cells. This result, taken with the tc data, indicates that ghosts have reduced membrane viscosity. Rheoscopic analysis also showed that eta m was reduced for ghosts, with the degree of reduction (approx. 50%) agreeing well with that estimated by the product mu p X tc. However, flow channel and pipette elongation estimates indicated that the ghost membrane elastic modulus was somewhat elevated compared to intact cells. We conclude that: ghosts have reduced membrane viscosity; ghosts have membrane rigidities close to intact cells, except possibly when the membrane is subjected to very large strains; the reduction in eta m is not directly related to the loss of hemoglobin; prolonged exposure of ghosts to low-ionic strength media increases the membrane viscosity toward its initial cellular level. These data indicate that the mechanical characteristics of ghost membranes can be varied by changing the methods of preparation and thus have potential application to further studies of the structural determinants of red cell membrane viscoelasticity.

  12. SIMILARITIES AND DISPARITIES OF GHOSTS IN EASTERN AND WESTERN LITERATURE BASED THE NOVELS LIAOZHAI ZHIYI, DRACULA, DAN A CHRISTAMAS CAROL

    Directory of Open Access Journals (Sweden)

    Cendrawaty Tjong

    2010-10-01

    in the two cultures. The results is: ghost in two cultures appear mostly in the night time, have different types and classifications, different physical images, different way of thinking and how to handle ghosts.

  13. Search for Dark Matter with LHC proton Beam Dump

    CERN Document Server

    Kumar, Ashok; Sharma, Archana

    2016-01-01

    Dark Matter (DM) comprising particles in the mass range of a few MeV to GeV is waiting to be explored, given the many theoretical models accommodating cosmological abundance. We hereby propose an experiment with the LHC proton beam of 7 TeV striking onto the beam dump target, emitting neutrinos and possibly, Dark Matter candidates. This experiment would also permit to observe signatures involving elastic and inelastic processes involving DM candidates, electrons and strongly interacting particles present in nuclei of the dump target. There will be residual neutrino background present in each of these signatures, hence the proposed experimental detector sub-systems would be such that they would involve as final states, elastically or inelasticity scattered, standard model particles. The bump or the excess in the tail of the kinematic distributions will eventually give us glimpse of presence of new particles which could possibly be Dark Matter candidates. Given the parameters of the LHC machine, the sensitivity...

  14. Formative mechanism of preferential solution flow during dump leaching

    Institute of Scientific and Technical Information of China (English)

    WU Ai-xiang; YIN Sheng-hua; LIU Jin-zhi; YANG Bao-hua

    2006-01-01

    Preferential flow is a rapid movement of solution through pores caused by coarse ores. Macropore is the main factor for the preferential flow. Macropore can be defined from three aspects. Segregation of the ores during dumping was studied according to particle kinematics. Small ores become smaller under the effect of acid and weathering. Clay in the rainwater from the hillside precipitates in the dump. Segregation and fine ores are the main causes in macropore. The permeability in coarse ores is better than that in fine ores. The mechanism in the preferential flows was studied combining the fast conducting effect of the macropore. Experimental result shows that, at certain application rate, fine ore area is saturated while large volume of solution flows laterally to the coarse ore area and leaks out quickly through the macropores. Thus the mechanism of preferential solution flows is further illustrated.

  15. Ocean dumping of low-level radioactive wastes

    Science.gov (United States)

    Templeton, W. L.

    1982-10-01

    Scientific bases, developed internationally over the last 20 years, to control and restrict to acceptable levels the resultant radiation doses that potentially could occur from the dumping of low-level radioactive wastes in the deep oceans were presented. It is concluded that present evaluations of the disposal of radioactive wastes into the oceans, coastal and deep ocean, indicate that these are being conducted within the ICRP recommended dose limits. However, there are presently no international institutions or mechanisms to deal with the long-term radiation exposure at low-levels to large numbers of people on a regional basis if not a global level. Recommendations were made to deal with these aspects through the established mechanisms of NEA/OECD and the London Dumping Convention, in cooperation with ICRP, UNSCEAR and the IAEA.

  16. Reclamation of coalmine overburden dump through environmental friendly method

    Directory of Open Access Journals (Sweden)

    Anfal Arshi

    2017-02-01

    Full Text Available Coal mine spoils (-the previous overburden of coal seams, inevitable by-product in the mining process which are usually unfavorable for plant growth have different properties according to dumping years. The reclamation of overburden dumps (OBDs through plantation by using efficient microbes with suitable bio-inoculants is an environmental friendly microbial technique for significant improvement in fertility status and biological activities of the OBD soil. A systematic greenhouse pot experiment program followed by field trial was conducted to investigate the influence of arbuscular mycorrhizal (AM and NFB on the performance of plant growth which have resulted in the development of environmental friendly bio-inoculant package for soil reclamation of abandoned mine land by revegetation.

  17. Augmenting the Stability of OB Dump by Using Fly Ash: A Geo Technical Approach to Sustainably Manage OB Dump at Jharia Coal Field, India

    Directory of Open Access Journals (Sweden)

    Anup Kumar Gupta*

    2016-04-01

    Full Text Available This paper is mainly focused over the possible utilization of fly ash along with OB dump to enhance the stability of OB dump and thus provide a sustainable approach for better waste management of both these materials simultaneously. Instability of coal mine overburden (OB dumps is an important problem in most of the coal mines like Jharia coalfields in India. This is mainly occurring due to sliding nature of the rock material, lack of vegetation etc. Numbers of Environmental and health issues are associated with these unstable OB dumps. As it may easily flow with running water can contaminate the nearby water resource as well as carbonaceous content of the dump causes air pollution due to simultaneous combustion. On the other hand management of coal ash that is produced from thermal plants is also an important task. Dumping of fly ash in open may cause number of environmental problems. Various geotechnical and physical parameters such as particle size analysis, specific gravity, density, and friction angle/cohesion test have been performed to check the stability of OB dump and to analyze impacts of fly ash utilization to stabilize the OB dump.

  18. Hydraulic activities by ghost shrimp Neotrypaea californiensis induce oxic-anoxic oscillations in sediments

    Science.gov (United States)

    We applied porewater pressure sensing, time-lapse photography and planar optode imaging of oxygen to investigate hydraulic behaviors of the Thalassinidean ghost shrimp Neotrypaea californiensis and the associated dynamics of oxygen in and around their burrows. Ghost shrimp were h...

  19. Gray-scale and color optical encryption based on computational ghost imaging

    Science.gov (United States)

    Tanha, Mehrdad; Kheradmand, Reza; Ahmadi-Kandjani, Sohrab

    2012-09-01

    We propose two approaches for optical encryption based on computational ghost imaging. These methods have the capability of encoding ghost images reconstructed from gray-scale images and colored objects. We experimentally demonstrate our approaches under eavesdropping in two different setups, thereby proving the robustness and simplicity thereof for encryption compared with previous algorithms.

  20. On the velocity of ghost particles and the bias errors in Tomographic-PIV

    NARCIS (Netherlands)

    Elsinga, G.E.; Westerweel, J.; Scarano, F.; Novara, M.

    2010-01-01

    The paper discusses bias errors introduced in Tomographic-PIV velocity measurements by the coherent motion of ghost particles under some circumstances. It occurs when a ghost particle is formed from the same set of actual particles in both reconstructed volumes used in the cross-correlation analysis

  1. Hydraulic activities by ghost shrimp Neotrypaea californiensis induce oxic-anoxic oscillations in sediments

    Science.gov (United States)

    We applied porewater pressure sensing, time-lapse photography and planar optode imaging of oxygen to investigate hydraulic behaviors of the Thalassinidean ghost shrimp Neotrypaea californiensis and the associated dynamics of oxygen in and around their burrows. Ghost shrimp were h...

  2. Harry Potter and the Ghost Teacher: Resurrecting the Lost Art of Lecturing

    Science.gov (United States)

    McDaniel, Kathryn N.

    2010-01-01

    A significant image of classroom lectures is the one presented in J. K. Rowling's "Harry Potter" series. At Harry's Hogwarts School of Witchcraft and Wizardry, the most torturous class is easily History of Magic, which is, incidentally, the only class in the school taught by a ghost. Being taught by a ghost could be quite exciting: not so in…

  3. Harry Potter and the Ghost Teacher: Resurrecting the Lost Art of Lecturing

    Science.gov (United States)

    McDaniel, Kathryn N.

    2010-01-01

    A significant image of classroom lectures is the one presented in J. K. Rowling's "Harry Potter" series. At Harry's Hogwarts School of Witchcraft and Wizardry, the most torturous class is easily History of Magic, which is, incidentally, the only class in the school taught by a ghost. Being taught by a ghost could be quite exciting: not so in…

  4. 50 CFR 697.21 - Gear identification and marking, escape vent, maximum trap size, and ghost panel requirements.

    Science.gov (United States)

    2010-10-01

    ... vent, maximum trap size, and ghost panel requirements. 697.21 Section 697.21 Wildlife and Fisheries... identification and marking, escape vent, maximum trap size, and ghost panel requirements. (a) Gear identification... Administrator finds to be consistent with paragraph (c) of this section. (d) Ghost panel. (1) Lobster traps...

  5. NCTO Endorses Mexican Anti-dumping Case With China

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    @@ The president of the National Council of Textile Organizations (NCTO) has written a letter to the Mexican Economic Secretary Hugo Diaz strongly endorsing his country's decision to seek a World Trade Organization (WTO) anti-dumping investigation of denim imports from China according to James A. Morrissey, a Washington Correspondent on June 8th. NCTO President Cass Johnson said the action is an important step toward preventing damage to both Mexican and U.S. denim manufacturers.

  6. Modeling of air pollution from the power plant ash dumps

    Science.gov (United States)

    Aleksic, Nenad M.; Balać, Nedeljko

    A simple model of air pollution from power plant ash dumps is presented, with emission rates calculated from the Bagnold formula and transport simulated by the ATDL type model. Moisture effects are accounted for by assumption that there is no pollution on rain days. Annual mean daily sedimentation rates, calculated for the area around the 'Nikola Tesla' power plants near Belgrade for 1987, show reasonably good agreement with observations.

  7. FATIGUE WELDING JOINT RESISTANCE OF MINING DUMP TRUCK BEARING CONSTRUCTIONS

    Directory of Open Access Journals (Sweden)

    A. A. Rakitsky

    2010-01-01

    Full Text Available The paper investigates a possibility to apply European norms on designing of welded constructions for frames of heavy-load mining dump trucks. Comparison of results concerning tests of welding joint specimen made of local steel with recommended standards of fatigue curves is executed in the paper. The paper reveals that while forecasting resource of automotive constructions with the accepted practical accuracy it is possible to use generalized fatigue resistance characteristics of standard welding joints. 

  8. Assessment of the mercury emissions from burning mining waste dumps

    Directory of Open Access Journals (Sweden)

    Barbara Białecka

    2016-04-01

    occur and to which the environment and local inhabitants can be exposed, it is important to define the size of the emission of mercury compounds from these objects. Despite the potential threats so far no measurements of mercury concentration which would a llow quantifying this phenomenon have been done. The analyses presented in this article fill this gap. Additionally, initial calculation of annual mercury emissions from burning coal mining waste dumps in Poland is presented.

  9. Design of a Compact Dump Resistor System for LCD Magnet

    CERN Document Server

    Gaddi, A

    2010-01-01

    In this technical note we suggest a possible solution for the choice of the detector magnet dump resistor. The push-pull scenario for Linear Collider Detectors imposes new solutions for magnet powering and protection lines, else than what developed for LHC detectors. The magnet dump resistor is the protecting equipment that has the function of extracting a significant amount of magnetic stored energy, from the coil winding to a dump. The LCD magnet has to move with the experiment from the garage to the beam position, so it has to be compact and reliable at the same time. We make here a proposal for a passive water-cooled dumper, we calculate the minimum amount of water required, the resistor hot-spot temperature, the overall mechanical design. The electrical part is not covered by this note, as it can be assumed that the solutions adopted by LHC detector magnets, in terms of quench instrumentation, energy extraction and maximum voltage, are not significantly affected by the push-pull scenario.

  10. Irradiation Effects on RIA Fragmentation Cu Beam Dump

    CERN Document Server

    Reyes, Susana; Boles, Jason; Stein, Werner; Wirth, Brian

    2005-01-01

    Within the scope of conceptual R&D activities in support of the Rare-Isotope Accelerator (RIA) facility, high priority is given to the development of high-power fragmentation beam dumps. A pre-study was made of a static water-cooled Cu beam dump that can meet requirements for a 400 MeV/u uranium beam. The issue of beam sputtering was addressed and found to be not a significant issue. Preliminary radiation transport simulations show significant damage (dpa) in the vicinity of the Bragg peak of uranium ions. Experimental data show that defects in Cu following neutron or high-energy particle irradiation tend to saturate at doses between 1 and 5 dpa, and this saturation in defect density also results in saturation of mechanical property degradation. However, effects of swift heavy ion irradiation and the production of gaseous and solid transmutant elements still need to be addressed. Initial calculations indicate that He concentrations on the order of 100 appm are produced in the beam dump after several weeks...

  11. Phytoremediation of coal mine spoil dump through integrated biotechnological approach

    Energy Technology Data Exchange (ETDEWEB)

    Juwarkar, A.A.; Jambhulkar, H.P. [National Environmental Engineering Research Institute, Nagpur (India)

    2008-07-15

    Field experiment was conducted on mine spoil dump on an area of 10 ha, to restore the fertility and productivity of the coal mine spoil dump using integrated biotechnological approach. The approach involves use of effluent treatment plant sludge (ETP sludge), as an organic amendment, biofertilizers and mycorrihzal fungi along with suitable plant species. The results of the study indicated that amendment with effluent treatment plant sludge (ETP sludge), at 50 ton/ha improved the physico-chemical properties of coal mine spoil. Due to biofertilizer inoculation different microbial groups such as Rhizobium, Azotobacter and VAM spores, which were practically absent in mine spoil improved greatly. Inoculation of biofertilizer and application of ETP sludge helped in reducing the toxicity of heavy metals such as chromium, zinc, copper, iron, manganese lead, nickel and cadmium, which were significantly reduced to 41%, 43%, 37%, 37%, 34%, 39%, 37% and 40%, respectively, due to the increased organic matter content in the ETP sludge and its alkaline pH (8.10-8.28), at which the metals gets immobilized and translocation of metals is arrested. Thus, amendment and biofertilizer application provided better supportive material for anchorage and growth of the plant on coal mine spoil dump.

  12. American Material Culture: Investigating a World War II Trash Dump

    Energy Technology Data Exchange (ETDEWEB)

    Julie Braun

    2005-10-01

    The Idaho National Laboratory: An Historical Trash Trove Historians and archaeologists love trash, the older the better. Sometimes these researchers find their passion in unexpected places. In this presentation, the treasures found in a large historic dump that lies relatively untouched in the middle of the Idaho National Laboratory (INL) will be described. The U.S. military used the central portion of the INL as one of only six naval proving grounds during World War II. They dumped trash in dry irrigation canals during and after their wartime activities and shortly before the federal government designated this arid and desolate place as the nation’s nuclear reactor testing station in 1949. When read critically and combined with memories and photographs, the 60-year old trash provides a glimpse into 1940s’ culture and the everyday lives of ordinary people who lived and worked during this time on Idaho’s desert. Thanks to priceless stories, hours of research, and the ability to read the language of historic artifacts, the dump was turned from just another trash heap into a treasure trove of 1940s memorabilia. Such studies of American material culture serve to fire our imaginations, enrich our understanding of past practices, and humanize history. Historical archaeology provides opportunities to integrate inanimate objects with animated narrative and, the more recent the artifacts, the more human the stories they can tell.

  13. American Material Culture: Investigating a World War II Trash Dump

    Energy Technology Data Exchange (ETDEWEB)

    Julie Braun

    2005-10-01

    The Idaho National Laboratory: An Historical Trash Trove Historians and archaeologists love trash, the older the better. Sometimes these researchers find their passion in unexpected places. In this presentation, the treasures found in a large historic dump that lies relatively untouched in the middle of the Idaho National Laboratory (INL) will be described. The U.S. military used the central portion of the INL as one of only six naval proving grounds during World War II. They dumped trash in dry irrigation canals during and after their wartime activities and shortly before the federal government designated this arid and desolate place as the nation’s nuclear reactor testing station in 1949. When read critically and combined with memories and photographs, the 60-year old trash provides a glimpse into 1940s’ culture and the everyday lives of ordinary people who lived and worked during this time on Idaho’s desert. Thanks to priceless stories, hours of research, and the ability to read the language of historic artifacts, the dump was turned from just another trash heap into a treasure trove of 1940s memorabilia. Such studies of American material culture serve to fire our imaginations, enrich our understanding of past practices, and humanize history. Historical archaeology provides opportunities to integrate inanimate objects with animated narrative and, the more recent the artifacts, the more human the stories they can tell.

  14. Phytoremediation of coal mine spoil dump through integrated biotechnological approach.

    Science.gov (United States)

    Juwarkar, Asha A; Jambhulkar, Hemlata P

    2008-07-01

    Field experiment was conducted on mine spoil dump on an area of 10 ha, to restore the fertility and productivity of the coal mine spoil dump using integrated biotechnological approach. The approach involves use of effluent treatment plant sludge (ETP sludge), as an organic amendment, biofertilizers and mycorrihzal fungi along with suitable plant species. The results of the study indicated that amendment with effluent treatment plant sludge (ETP sludge), @ 50 ton/ha improved the physico-chemical properties of coal mine spoil. Due to biofertilizer inoculation different microbial groups such as Rhizobium, Azotobacter and VAM spores, which were practically absent in mine spoil improved greatly. Inoculation of biofertilizer and application of ETP sludge helped in reducing the toxicity of heavy metals such as chromium, zinc, copper, iron, manganese lead, nickel and cadmium, which were significantly reduced to 41%, 43%, 37%, 37%, 34%, 39%, 37% and 40%, respectively, due to the increased organic matter content in the ETP sludge and its alkaline pH (8.10-8.28), at which the metals gets immobilized and translocation of metals is arrested. Thus, amendment and biofertilizer application provided better supportive material for anchorage and growth of the plant on coal mine spoil dump.

  15. Recombination Ghosts in Littrow Configuration: Implications for Spectrographs Using Volume Phase Holographic Gratings

    CERN Document Server

    Burgh, Eric B; Westfall, Kyle B; Nordsieck, Kenneth H

    2007-01-01

    We report the discovery of optical ghosts generated when using Volume Phase Holographic (VPH) gratings in spectrographs employing the Littrow configuration. The ghost is caused by light reflected off the detector surface, recollimated by the camera, recombined by, and reflected from, the grating and reimaged by the camera onto the detector. This recombination can occur in two different ways. We observe this ghost in two spectrographs being developed by the University of Wisconsin - Madison: the Robert Stobie Spectrograph for the Southern African Large Telescope and the Bench Spectrograph for the WIYN 3.5m telescope. The typical ratio of the brightness of the ghost relative to the integrated flux of the spectrum is of order 10^-4, implying a recombination efficiency of the VPH gratings of order 10^-3 or higher, consistent with the output of rigorous coupled wave analysis. Any spectrograph employing VPH gratings, including grisms, in Littrow configuration will suffer from this ghost, though the general effect i...

  16. Democracy - the real 'ghost' in the machine of global health policy: Comment on "A ghost in the machine? politics in global health policy".

    Science.gov (United States)

    Harmer, Andrew

    2014-08-01

    Politics is not the ghost in the machine of global health policy. Conceptually, it makes little sense to argue otherwise, while history is replete with examples of individuals and movements engaging politically in global health policy. Were one looking for ghosts, a more likely candidate would be democracy, which is currently under attack by a new global health technocracy. Civil society movements offer an opportunity to breathe life into a vital, but dying, political component of global health policy.

  17. Supersymmetric P(X,phi) and the Ghost Condensate

    CERN Document Server

    Khoury, Justin; Ovrut, Burt

    2010-01-01

    We show how to construct supersymmetric actions for higher-derivative scalar field theories of the form P(X,phi), within the context of d=4, N=1 supersymmetry. This construction is of general use, and is applied to write a supersymmetric version of the Dirac-Born-Infeld action. Our principal application of this formalism is to construct the supersymmetric extension of the ghost condensate. This allows us to study the interplay between supersymmetry, time-dependent backgrounds and violations of the null energy condition.

  18. Wigner function for discrete phase space: exorcising ghost images

    CERN Document Server

    Arg"uelles, A; Arg\\"uelles, Arturo; Dittrich, Thomas

    2005-01-01

    We construct, using simple geometrical arguments, a Wigner function defined on a discrete phase space of arbitrary integer Hilbert-space dimension that is free of redundancies. ``Ghost images'' plaguing other Wigner functions for discrete phase spaces are thus revealed as artifacts. It allows to devise a corresponding phase-space propagator in an unambiguous manner. We apply our definitions to eigenstates and propagator of the quantum baker map. Scars on unstable periodic points of the corresponding classical map become visible with unprecedented resolution.

  19. On the Uniqueness of Ghost-Free Special Gravity

    Science.gov (United States)

    Bai, Dong; Xing, Yu-Hang

    2017-09-01

    Special gravity refers to interacting theories of massless gravitons in Minkowski space-time which are invariant under the abelian gauge invariance {h}ab\\to {h}ab+{\\partial }(a{χ }b) only. In this article we determine the most general form of special gravity free of Ostrogradski ghosts, meaning its equation of motion is of at most second order. Together with the recent works, this result could be helpful in formulating proofs of General Relativity as the unique physical theory of self-interacting massless gravitons. We also study how to construct gauge invariant couplings to matter fields.

  20. Stable cosmology in ghost-free quasidilaton theory

    Science.gov (United States)

    Gümrükçüoǧlu, A. Emir; Koyama, Kazuya; Mukohyama, Shinji

    2017-08-01

    We present a novel cosmological solution in the framework of extended quasidilaton theory which underwent scrutiny recently. We only consider terms that do not generate the Boulware-Deser degree of freedom, hence the ghost-free quasidilaton theory, and show three new branches of cosmological evolution therein. One of the solutions passes the perturbative stability tests. This new solution exhibits a late time self-acceleration and all graviton polarizations acquire masses that converge to a constant in the asymptotic future. Moreover, all modes propagate at the speed of light. We propose that this solution can be used as a benchmark model for future phenomenological studies.

  1. Ghost in the Shell: nueva carne, viejas dolencias

    Directory of Open Access Journals (Sweden)

    Gerardo Ariel Del Vigo

    2015-09-01

    Full Text Available El presente análisis de Ghost in the Shell, film animado japonés de cyberpunk, comprende una serie de reflexiones acerca de las tensiones entre el humanismo y el posthumanismo problematizadas en la categoría cíborg. A partir del desarrollo del personaje protagonista, Motoko Kusanagi, se dará cuenta también de las problemáticas de una sociedad tecnocolonizada en lógicas capitalistas de producción constante en los cuerpos y sus síntomas de persistencia humana en la nueva carne posthumana.

  2. Propagation and ghosts in the classical kagome antiferromagnet.

    Science.gov (United States)

    Robert, J; Canals, B; Simonet, V; Ballou, R

    2008-09-12

    We investigate the classical spin dynamics of the kagome antiferromagnet by combining Monte Carlo and spin dynamics simulations. We show that this model has two distinct low temperature dynamical regimes, both sustaining propagative modes. The expected gauge invariance type of the low energy, low temperature, out-of-plane excitations is also evidenced in the nonlinear regime. A detailed analysis of the excitations allows us to identify ghosts in the dynamical structure factor, i.e., propagating excitations with a strongly reduced spectral weight. We argue that these dynamical extinction rules are of geometrical origin.

  3. Recovery of compacted soils in Mojave Desert ghost towns.

    Science.gov (United States)

    Webb, R.H.; Steiger, J.W.; Wilshire, H.G.

    1986-01-01

    Residual compaction of soils was measured at seven sites in five Mojave Desert ghost towns. Soils in these Death Valley National Monument townsites were compacted by vehicles, animals, and human trampling, and the townsites had been completely abandoned and the buildings removed for 64 to 75 yr. Recovery times extrapolated using a linear recovery model ranged from 80 to 140 yr and averaged 100 yr. The recovery times were related to elevation, suggesting freeze-thaw loosening as an important factor in ameliorating soil compaction in the Mojave Desert. -from Authors

  4. Ghost dark energy models in specific modified gravity

    Science.gov (United States)

    Jawad, Abdul; Salako, Ines G.; Sohail, Ayesha

    2016-09-01

    The paper is devoted to the study of the cosmic acceleration through ghost dark energy models (its simple and generalized form) in the dynamical Chern-Simons modified gravity. In order to check the reliability of this scenario, we explore different cosmological parameters, such as deceleration, equation of state parameters and squared speed of sound. The cosmological planes ωD - 'D and r- s are also investigated in this framework. The obtained results are consistent with observational data of various schemes (WMAP+eCAMB+BAO+H0).

  5. Ghostly Collaboration: the Authorship of False Criminal Confession

    Directory of Open Access Journals (Sweden)

    Mary Laughlin

    2014-12-01

    Full Text Available Drawing on a body of confession scholarship, “Ghostly Collaboration” defines “coercive ghostwriting,” an authorship-inspired term for collaborative practices enacted between custodial criminal suspects and professional police interrogators resulting in coerced, potentially false confession. Within the United States, still-prominent notions of a Romantically-influenced autonomous Author problematically intersect with public perception of collaborative texts; the coercive ghostwriting label is intended to draw explicit attention to co-authorship via coercive collaboration, hopefully contributing to the ongoing efforts of researchers working to challenge inaccurate views of false confessions.

  6. Massive ghost theories with a line of defects

    Science.gov (United States)

    Mosconi, Paola

    2003-06-01

    We study free massive fermionic ghosts, in the presence of an extended line of impurities, relying on the Lagrangian formalism. We propose two distinct defect interactions, respectively, of relevant and marginal nature. The corresponding scattering theories reveal the occurrence of resonances and instabilities in the former case and the presence of poles with imaginary residues in the latter. Correlation functions of the thermal and disorder operators are computed exactly, exploiting the bulk form factors and the matrix elements relative to the defect operator. In the marginal situation, the one-point function of the disorder operator displays a critical exponent continuously varying with the interaction strength.

  7. Refractive effects in 9Be scattering and nuclear rainbow ghosts

    Science.gov (United States)

    Satchler, G. R.; Fulmer, C. B.; Auble, R. L.; Ball, J. B.; Bertrand, F. E.; Erb, K. A.; Gross, E. E.; Hensley, D. C.

    1983-08-01

    Data for the elastic scattering of 9Be on 12C and 16O at 158 MeV provide evidence of refractive effects that allow the optical potentials to be determined with little ambiguity. The real potentials are deep. Large angle data indicate dominance of negative-angle scattering from the far side of the target nucleus. The analysis also implies a residual rainbow phenomenon, contrary to what has been seen previously in heavy-ion scattering. We suggest this be called a rainbow ghost. Operated by Union Carbide Corporation under contract W-7405-eng-26 with the US Department of Energy.

  8. Reclamation of the illegal dump for sustainable development the environment in Sverdlovo of Leningrad Oblast’, Russia

    Directory of Open Access Journals (Sweden)

    Bukova Maria

    2016-01-01

    Full Text Available Illegal dumping is dumping of any waste such as oil, furniture, appliances, trash, litter or landscaping cuttings, upon any land of state, city, village or private ownership without consent of the owner. Illegal dumping has a great negative and fatal impact on our environment and all living organisms both fauna and flora. It also exposes people to various risks of chemicals (fluids or dust and is a big threat to all under-ground and surface water resources. Illegal dumps also attract all kinds of bugs such as rodents and insects. For example, illegal dumps with waste tires provide a practically perfect place for mosquitoes to breed. Mosquitoes can multiply 100 times faster than normal in the warm, stagnant water in waste tires. Exemplary for the illegal dump in Sverdlovo of Leningrad Oblast’ the main purpose of this article is to offer a possible option for the remediation of contaminated area.

  9. Charging for the waste dumping of open-pit metal mines

    Institute of Scientific and Technical Information of China (English)

    Yunbing Hou; Zhaoxiang Zhang; Haifeng Duan; Liming Xue

    2006-01-01

    Based on the externality theory and the environmental value theory, the hypothesis of charging for waste dumping of open-pit metal mines was put forth. The charging methods were designed according to the characteristics of waste dumping of openpit metal mines, including charging based on the dumping amount of the total waste, multi-charging factors, exceeding standard punishment charging, and so on. The main charging parameter is based on the dumping area rather than the total amount of waste dumping.The charging model of waste dumping of open-pit mines was formulated, and the charging rate was divided into two parts, i.e., the standard charging rate and the differential charging rate. The standard charging rate was derived using the equilibrium dynamic model,whereas the differential one was obtained by establishing the fuzzy synthesized evaluation model.

  10. Soils on overburden dumps in the forest-steppe and mountain taiga zones of the Kuzbass

    Science.gov (United States)

    Bragina, P. S.; Tsibart, A. S.; Zavadskaya, M. P.; Sharapova, A. V.

    2014-07-01

    The properties of the soils forming on coal dumps significantly depend on the properties of the parent rocks and the technology of creating the dumps. In the forest-steppe and mountain taiga zones of the Kuznetsk Coal Basin, argillites, siltstones, and sandstones are the overburden and enclosing rocks. They are responsible for the alkaline reaction and the same microelement composition in almost all the soils studied. The nonselective formation of the dumps and the predominance of the coarse fraction in the rocks composing the dumps is a cause of the wide distribution of petrozems and humus petrozems on their surface. The presence of a great amount of coal particles in the substrates and the incorrect planning of the dumps may be the reasons for their self-ignition, which can change the composition of polycyclic aromatic hydrocarbons in the soils of the dumps.

  11. Assessment of relationship between fungal aerosol within a municipal dump and epiphytic mycoflora of crop plants.

    Science.gov (United States)

    Ropek, Dariusz Roman; Fraczek, Krzysztof; Kozdrój, Jacek; Chmiel, Maria

    2013-01-01

    A field study was performed to assess whether fungal aerosol of a municipal dump may impact on quantitative and qualitative characteristics of epiphytic mycoflora of crop plants cultivated in vicinity of the dump. Sampling sites were located at every side of the dump. Plant samples were collected from field bean, spring wheat and potato. The highest concentration of fungal aerosol was found at the field located south of the dump within the zone of 250 m next to its borders. For this zone, the most numerous and diverse mycoflora was ascertained, and the plants cultivated were the most damaged. The results suggest that the municipal dump was not the source of phytopathogenic fungi; however, different emissions of contaminants from the dump might cause a decline in the intrinsic plant resistance against the pathogens.

  12. Automatic Post-Operational Checks for the LHC Beam Dump System

    CERN Document Server

    Gallet, E; Baggiolini, V; Carlier, E; Goddard, B; Kain, V; Lamont, M; Magnin, N; Verhagen, H; Uythoven, J

    2008-01-01

    In order to ensure the required level of reliability of the LHC beam dump system a series of post-operational checks must be performed after each dump action. This paper describes the various data handling and data analysis systems which are required internally and at different levels of the LHC control system, for postoperational checks, and the experience from the commissioning of the equipment where these systems were used to analyse the dump kicker performance.

  13. Living with ghosts in Horava-Lifshitz gravity

    CERN Document Server

    Ramazanov, S; Celoria, M; Matarrese, S; Pilo, L

    2016-01-01

    We consider the branch of the projectable Horava-Lifshitz model which exhibits ghost instabilities in the low energy limit. It turns out that, due to the Lorentz violating structure of the model and to the presence of a finite strong coupling scale, the vacuum decay rate into photons is tiny in a wide range of phenomenologically acceptable parameters. The strong coupling scale, understood as a cutoff on ghosts' spatial momenta, can be raised up to $\\Lambda \\sim 10$ TeV. At lower momenta, the projectable Horava-Lifshitz gravity is equivalent to General Relativity supplemented by a fluid with a small positive sound speed squared (10^{-42} \\lesssim) c^2_s \\lesssim 10^{-20}, that could be a promising candidate for the Dark Matter. Despite these advantages, the unavoidable presence of the strong coupling obscures the implementation of the original Ho\\v{r}ava's proposal on quantum gravity. The low energy projectable Horava-Lifshitz gravity can be also related to mimetic dark matter, where the analogue of the projec...

  14. Fourier-transform Ghost Imaging with Hard X-rays

    CERN Document Server

    Yu, Hong; Han, Shensheng; Xie, Honglan; Du, Guohao; Xiao, Tiqiao; Zhu, Daming

    2016-01-01

    Knowledge gained through X-ray crystallography fostered structural determination of materials and greatly facilitated the development of modern science and technology in the past century. Atomic details of sample structures is achievable by X-ray crystallography, however, it is only applied to crystalline structures. Imaging techniques based on X-ray coherent diffraction or zone plates are capable of resolving the internal structure of non-crystalline materials at nanoscales, but it is still a challenge to achieve atomic resolution. Here we demonstrate a novel lensless Fourier-transform ghost imaging method with pseudo-thermal hard X-rays by measuring the second-order intensity correlation function of the light. We show that high resolution Fourier-transform diffraction pattern of a complex structure can be achieved at Fresnel region, and the amplitude and phase distributions of a sample in spatial domain can be retrieved successfully. The method of lensless X-ray Fourier-transform ghost imaging extends X-ray...

  15. Interacting Ghost Dark Energy Model: Dynamical System Analysis

    CERN Document Server

    Golchin, Hanif; Ebrahimi, Esmaeil

    2016-01-01

    We study the impacts of interaction between dark matter and dark energy in the context of ghost dark energy model. Using the dynamical system analysis, we obtain the fixed points of the system for different types of interactions while the universe is filled with radiation, matter (including dark matter and luminous matter) and dark energy components. We consider the stability of the fixed points in details for different cases. In all cases there is an unstable matter dominated epoch and a stable late time dark energy dominated phase. However, we find that adding the linear interaction, the evolution of ghost dark energy model does not contain the radiation dominated epoch in the early times which is a necessary point in any cosmic model. This failure resolved when we add the non-linear interaction to the model. We also find an upper bound for the value of the coupling constant of the interaction between dark matter and dark energy as b < 0.57 . This bound is necessary to have a decelerating and unstable ma...

  16. Solution to the ghost problem in fourth order derivative theories

    CERN Document Server

    Mannheim, P D

    2006-01-01

    We present a solution to the ghost problem in fourth order derivative theories. In particular we study the Pais-Uhlenbeck fourth order oscillator model, a model which serves as a prototype for theories which are based on second plus fourth order derivative actions. Via a Dirac constraint method quantization we construct the appropriate quantum-mechanical Hamiltonian and Hilbert space for the system. We find that while the second-quantized Fock space of the general Pais-Uhlenbeck model does indeed contain the negative norm energy eigenstates which are characteristic of higher derivative theories, in the limit in which we switch off the second order action, such ghost states are found to move off shell, with the spectrum of asymptotic in and out S-matrix states of the pure fourth order theory which results being found to be completely devoid of states with either negative energy or negative norm. We provide additional insight into the structure of the Pais-Uhlenbeck theory by quantizing it via path integration ...

  17. Generalized Ghost Dark Energy with Non-Linear Interaction

    CERN Document Server

    Ebrahimi, E; Mehrabi, A; Movahed, S M S

    2016-01-01

    In this paper we investigate ghost dark energy model in the presence of non-linear interaction between dark energy and dark matter. The functional form of dark energy density in the generalized ghost dark energy (GGDE) model is $\\rho_D\\equiv f(H, H^2)$ with coefficient of $H^2$ represented by $\\zeta$ and the model contains three free parameters as $\\Omega_D, \\zeta$ and $b^2$ (the coupling coefficient of interactions). We propose three kinds of non-linear interaction terms and discuss the behavior of equation of state, deceleration and dark energy density parameters of the model. We also find the squared sound speed and search for signs of stability of the model. To compare the interacting GGDE model with observational data sets, we use more recent observational outcomes, namely SNIa, gamma-ray bursts, baryonic acoustic oscillation and the most relevant CMB parameters including, the position of acoustic peaks, shift parameters and redshift to recombination. For GGDE with the first non-linear interaction, the j...

  18. Efficient ghost cell reconstruction for embedded boundary methods

    Science.gov (United States)

    Rapaka, Narsimha; Al-Marouf, Mohamad; Samtaney, Ravi

    2016-11-01

    A non-iterative linear reconstruction procedure for Cartesian grid embedded boundary methods is introduced. The method exploits the inherent geometrical advantage of the Cartesian grid and employs batch sorting of the ghost cells to eliminate the need for an iterative solution procedure. This reduces the computational cost of the reconstruction procedure significantly, especially for large scale problems in a parallel environment that have significant communication overhead, e.g., patch based adaptive mesh refinement (AMR) methods. In this approach, prior computation and storage of the weightage coefficients for the neighbour cells is not required which is particularly attractive for moving boundary problems and memory intensive stationary boundary problems. The method utilizes a compact and unique interpolation stencil but also provides second order spatial accuracy. It provides a single step/direct reconstruction for the ghost cells that enforces the boundary conditions on the embedded boundary. The method is extendable to higher order interpolations as well. Examples that demonstrate the advantages of the present approach are presented. Supported by the KAUST Office of Competitive Research Funds under Award No. URF/1/1394-01.

  19. Fourier-Transform Ghost Imaging with Hard X Rays

    Science.gov (United States)

    Yu, Hong; Lu, Ronghua; Han, Shensheng; Xie, Honglan; Du, Guohao; Xiao, Tiqiao; Zhu, Daming

    2016-09-01

    Knowledge gained through x-ray crystallography fostered structural determination of materials and greatly facilitated the development of modern science and technology in the past century. However, it is only applied to crystalline structures and cannot resolve noncrystalline materials. Here we demonstrate a novel lensless Fourier-transform ghost imaging method with pseudothermal hard x rays that extends x-ray crystallography to noncrystalline samples. By measuring the second-order intensity correlation function of the light, Fourier-transform diffraction pattern of a complex amplitude sample is achieved at the Fresnel region in our experiment and the amplitude and phase distributions of the sample in the spatial domain are retrieved successfully. For the first time, ghost imaging is experimentally realized with x rays. Since a highly coherent x-ray source is not required, the method can be implemented with laboratory x-ray sources and it also provides a potential solution for lensless diffraction imaging with fermions, such as neutrons and electrons where intensive coherent sources usually are not available.

  20. Living with ghosts in Hořava-Lifshitz gravity

    Science.gov (United States)

    Ramazanov, S.; Arroja, F.; Celoria, M.; Matarrese, S.; Pilo, L.

    2016-06-01

    We consider the branch of the projectable Hořava-Lifshitz model which exhibits ghost instabilities in the low energy limit. It turns out that, due to the Lorentz violating structure of the model and to the presence of a finite strong coupling scale, the vacuum decay rate into photons is tiny in a wide range of phenomenologically acceptable parameters. The strong coupling scale, understood as a cutoff on ghosts' spatial momenta, can be raised up to Λ ˜ 10 TeV. At lower momenta, the projectable Hořava-Lifshitz gravity is equivalent to General Relativity supplemented by a fluid with a small positive sound speed squared (10-42 ≲) c s 2 ≲ 10-20, that could be a promising candidate for the Dark Matter. Despite these advantages, the unavoidable presence of the strong coupling obscures the implementation of the original Hořava's proposal on quantum gravity. Apart from the Hořava-Lifshitz model, conclusions of the present work hold also for the mimetic matter scenario, where the analogue of the projectability condition is achieved by a non-invertible conformal transformation of the metric.

  1. An algebraic approach to laying a ghost to rest

    Energy Technology Data Exchange (ETDEWEB)

    Nucci, M C [Dipartimento di Matematica e Informatica, Universita di Perugia, 06123 Perugia (Italy); Leach, P G L, E-mail: nucci@unipg.i, E-mail: leachp@ukzn.ac.z, E-mail: leach@math.aegean.g [DICSE, University of the Aegean, Karlovassi 83 200 (Greece)

    2010-05-01

    In the recent literature there has been a resurgence of interest in the fourth-order field-theoretic model of Pais-Uhlenbeck (1950 Phys. Rev. 79 145-65) which has not had a good reception over the past half a century due to the existence of ghosts in the properties of the quantum mechanical solution. Bender and Mannheim (2008 J. Phys. A: Math. Theor. 41 304018) were successful in persuading the corresponding quantum operator to 'give up the ghost'. Their success had the advantage of making the model of Pais-Uhlenbeck acceptable to the physics community and in the process added further credit to the cause of advancement of the use of PT symmetry. We present a case for the acceptance of the Pais-Uhlenbeck model in the context of Dirac's theory by providing an Hamiltonian that is not quantum mechanically haunted. The essential point is the manner in which a fourth-order equation is rendered into a system of second-order equations. We show by means of the method of reduction of order (Nucci M C 1996 J. Math. Phys. 37 1772-5) that it is possible to construct a Hamiltonian that gives rise to a satisfactory quantal description without having to abandon Dirac.

  2. Game Analysis of Implementing Price Undertaking Agreements in Anti-dumping Disputes

    Institute of Scientific and Technical Information of China (English)

    XI Jun-fang; CANG Ping; ZHONG Gen-yuan

    2008-01-01

    The Price Undertaking Agreement is one of the strategies a company accused of dumping often adopts in dealing with anti-dumping disputes. Using static game analysis, this paper compares the impact that anti-dumping duties and price undertaking agreements may have on an importing country's social welfare and an accused company's market performance. We conclude that, compared with anti-dumping duties, price undertakings improve the importing country's social welfare and reduce the accused company's market share in the import country. We also note that, in addition to the financial benefit, price undertakings can prevent escalation of trade disputes in international trade negotiations.

  3. Preliminary studies on trace element contamination in dumping sites of municipal wastes in India and Vietnam

    Science.gov (United States)

    Agusa, T.; Kunito, T.; Nakashima, E.; Minh, T. B.; Tanabe, S.; Subramanian, A.; Viet, P. H.

    2003-05-01

    The disposal of wastes in dumping sites has increasingly caused concem about adverse health effects on the populations living nearby. However, no investigation has been conducted yet on contamination in dumping sites of municipal wastes in Asian developing countries. In this study, concentrations of 11 trace elements (V, Cr, Mn, Co, Cu, Zn, Mo, Ag, Cd, Sb and Pb) were detennined in scalp hair from the population living nearby and in soil from dumping sites and control sites of India and Vietnam. Soil samples in dumping site in India showed significantly higher concentrations of some trace elements than soils in control site, whereas this trend was not notable in Vietnam. This is probably due to the fact that the wastes were covered with the soil in the dumping site of Vietnam. Cadmium concentrations in some hair samples of people living near dumping site in India and Vietnam exceeded the level associated with learning disorder in children. Levels of most of the trace elements in hair were significantly higher in dumping site than those in control site in India and Vietnam, suggesting direct or indirect exposure to those elements from dumping wastes. To our knowledge, this is the first study of trace element contamination in dumping sites in India and Vietnam.

  4. Dumping and injury margins in markets with horizontal as well as vertical product differentiation

    DEFF Research Database (Denmark)

    Nielsen, Jørgen Ulff-Møller; Hansen, Jørgen Drud

    2009-01-01

    This paper examines the GATT/WTO rules for anti-dumping measures in a duopoly model with both horizontal and vertical product differentiation. The GATT/WTO rules allow for anti-dumping measures if domestic producers, exposed to price discrimination, also demonstrate injury where price...... countries in ability to implement anti-dumping measures predominantly favors the developed countries which are specialized in producing high-quality products. The paper suggests an overall critical look at the lenient rules for implementing anti-dumping measures-especially the rules for injury determination...

  5. [Anastomotic false-diverticulum causing an atypical dumping syndrome. A case report].

    Science.gov (United States)

    Covarelli, P; Esperti, L; Fratto, A; Cerroni, M; Marianeschi, P; Cristofani, R

    2003-02-01

    Aim of the study is to evaluate the causes of dumping syndromes following partial gastrectomies, and to report an unusual feature of dumping. A case of early dumping due to diverticular-like dilation of gastro-jejunal anastomosis is described with preoperative imaging and intraoperative picture. The surgical correction led to complete clinical remission; the common causes and physiopathological bases of dumping are reviewed and the role of en-Y gastro-jejunal reconstruction is underlined in order to reduce the risk of developing the syndrome.

  6. Polish legal regulations considering recovery of secondary materials from coal mining dumping grounds

    Directory of Open Access Journals (Sweden)

    Gawor Łukasz

    2014-12-01

    Full Text Available In the article there is presented temporary situation of coal mining dumping grounds in Poland – their inventarization, localization and environmental impacts. The coal mining dumping grounds in Poland are situated in three coal basins: Upper Silesian Coal Basin, Lower Silesian Coal Basin and Lublin Coal Basin. In all mentioned areas occur ca. 270 coal mining waste dumps, covering surface of over 4400 ha. The main environmental impacts connected with dumping grounds are fire hazards, water pollution and a danger of slope sliding. The question of recovery of coal from disposed wastes with regard to legal regulations is discussed. There are presented technical methods of coal recovery considering environmental protection issues. There is a necessity and technical possibility of recovery of coal from the coal-mining waste dumps. The coal recovery reduces hazards of self-ignition and fires of the dump. It is also economically justified. The analysis of required regulations in legal system in Poland for safe exploitation of secondary materials from coal mining dumps is done. Socio-economic aspects of recovery of coal are discussed. The valid legal regulations in Poland regulate the issues connected with coal mining dumping grounds in a very general way. It is necessary to prepare supplements to the legal provisions or new regulations concerning post-mining dumping grounds.

  7. Similarities and Disparities of Ghosts in Eastern and Western Literature Based the Novels Liaozhai Zhiyi, Dracula, dan a Christamas Carol

    Directory of Open Access Journals (Sweden)

    Cendrawaty Tjong

    2010-11-01

    Full Text Available Ghosts is one of life unexplained phenomena also interesting theme for entertainment and literature materials. Every nation have their own ghost literature that reflects the nation’s view on ghost itself. This article compares China’s Liaozhai Zhiyi, Western’s Dracula and A Christmas Carol as representations of both culture. The writer through desktop study method found that culture influenced and shaped ghost image in the mind of novel writer. This leads to different image of ghost in the two cultures. The results is: ghost in two cultures appear mostly in the night time, have different types and classifications, different physical images, different way of thinking and how to handle ghosts.

  8. Positive-negative corresponding normalized ghost imaging based on an adaptive threshold

    Science.gov (United States)

    Li, G. L.; Zhao, Y.; Yang, Z. H.; Liu, X.

    2016-11-01

    Ghost imaging (GI) technology has attracted increasing attention as a new imaging technique in recent years. However, the signal-to-noise ratio (SNR) of GI with pseudo-thermal light needs to be improved before it meets engineering application demands. We therefore propose a new scheme called positive-negative correspondence normalized GI based on an adaptive threshold (PCNGI-AT) to achieve a good performance with less amount of data. In this work, we use both the advantages of normalized GI (NGI) and positive-negative correspondence GI (P-NCGI). The correctness and feasibility of the scheme were proved in theory before we designed an adaptive threshold selection method, in which the parameter of object signal selection conditions is replaced by the normalizing value. The simulation and experimental results reveal that the SNR of the proposed scheme is better than that of time-correspondence differential GI (TCDGI), avoiding the calculation of the matrix of correlation and reducing the amount of data used. The method proposed will make GI far more practical in engineering applications.

  9. An Improved Ghost-cell Immersed Boundary Method for Compressible Inviscid Flow Simulations

    KAUST Repository

    Chi, Cheng

    2015-05-01

    This study presents an improved ghost-cell immersed boundary approach to represent a solid body in compressible flow simulations. In contrast to the commonly used approaches, in the present work ghost cells are mirrored through the boundary described using a level-set method to farther image points, incorporating a higher-order extra/interpolation scheme for the ghost cell values. In addition, a shock sensor is in- troduced to deal with image points near the discontinuities in the flow field. Adaptive mesh refinement (AMR) is used to improve the representation of the geometry efficiently. The improved ghost-cell method is validated against five test cases: (a) double Mach reflections on a ramp, (b) supersonic flows in a wind tunnel with a forward- facing step, (c) supersonic flows over a circular cylinder, (d) smooth Prandtl-Meyer expansion flows, and (e) steady shock-induced combustion over a wedge. It is demonstrated that the improved ghost-cell method can reach the accuracy of second order in L1 norm and higher than first order in L∞ norm. Direct comparisons against the cut-cell method demonstrate that the improved ghost-cell method is almost equally accurate with better efficiency for boundary representation in high-fidelity compressible flow simulations. Implementation of the improved ghost-cell method in reacting Euler flows further validates its general applicability for compressible flow simulations.

  10. Ghost reflections of Gaussian beams in anamorphic optical systems with an application to Michelson interferometer.

    Science.gov (United States)

    Abd El-Maksoud, Rania H

    2016-02-20

    In this paper, a methodology is developed to model and analyze the effect of undesired (ghost) reflections of Gaussian beams that are produced by anamorphic optical systems. The superposition of these beams with the nominal beam modulates the nominal power distribution at the recording plane. This modulation may cause contrast reduction, veiling parts of the nominal image, and/or the formation of spurious interference fringes. The developed methodology is based on synthesizing the beam optical paths into nominal and ghost optical beam paths. Similar to the nominal beam, we present the concept that each ghost beam is characterized by a beam size, wavefront radius of curvature, and Gouy phase in the paraxial regime. The nominal and ghost beams are sequentially traced through the system and formulas for estimating the electric field magnitude and phase of each ghost beam at the recording plane are presented. The effective electric field is the addition of the individual nominal and ghost electric fields. Formulas for estimating Gouy phase, the shape of the interference fringes, and the central interference order are introduced. As an application, the theory of the formation of the interference fringes by Michelson interferometer is presented. This theory takes into consideration the ghost reflections that are formed by the beam splitter. To illustrate the theory and to show its wide applicability, simulation examples that include a Mangin mirror, a Michelson interferometer, and a black box optical system are provided.

  11. [Clinical application and mechanism on the ghost points in the treatment of mental diseases].

    Science.gov (United States)

    Tao, Ying; Hou, Wenguang; Liang, Yan; Zong, Lei

    2015-02-01

    In order to explore the clinical application and mechanism of the ghost points in the treatment of mental diseases, taking "the ghost points" and "mental diseases" as the theme and the key words, the literatures in recent 10 years on the treatment of mental diseases with the ghost points were collected from CNKI and Wanfang database and analyzed. It is discovered that the ghost points can treat schizophrenia, manic-depressive disorder, dementia, stroke, loss of consciousness, insomnia. anxiety, depression and hysteria and the efficacy is favorable. It is believed that the ghost points act on balancing yin and yang, regulating qi and blood, regaining consciousness and tranquilizing the mind and they achieve the very excellent effect on mental diseases. At present, the reports on this aspect are limited. Hence, it is required to promote the study on the clinical application and mechanism of the ghost points so as to enlarge the clinical indications of the ghost points and provide the powerful support on mechanism for the treatment of mental diseases.

  12. Evaluation of ghost cell survival in the area of radiofrequency ablation.

    Directory of Open Access Journals (Sweden)

    Qi Wang

    Full Text Available BACKGROUND AND AIM: Researchers have demonstrated dead cells in radiofrequency ablation (RFA lesions that have morphological similarities to viable tumor cells and are thus referred to as ghost cells. However, studies on how long ghost cells persist have not been systematically performed. METHODS: A tumor model was established by implanting VX2 tumor tissue into the livers of 48 New Zealand rabbits. Two weeks later, these tumors were eliminated with RFA. The lesions were resected at 0 weeks, 1 week, 2 weeks, 4 weeks, 8 weeks, or 12 weeks after treatment, and samples were stained either with hematoxylin and eosin (HE or nicotinamide adenine dinucleotide (NADH. The presence of the cells and the morphological changes that they underwent were examined by light microscopy. RESULTS: Four weeks after RFA, there were no obvious morphological changes observed in HE-stained ghost cells, and NADH staining revealed no viable cells. Eight weeks after RFA, the cell structure became indistinct. Twelve weeks after RFA, ghost cells were no longer present. CONCLUSIONS: The morphological characteristics of ghost cells are maintained for at least 4 weeks, during which time HE staining cannot be used to differentiate ghost cells from residual tumor cells. NADH staining for cell viability is necessary to differentiate residual tumor cells from ghost cells. This evidence adds to our understanding of the mechanisms of RFA when used on solid tumors.

  13. High-resolution computational ghost imaging and ghost diffraction through turbulence via a beam-shaping method

    Science.gov (United States)

    Luo, Chun-Ling; Zhuo, Ling-Qing

    2017-01-01

    Imaging through atmospheric turbulence is a topic with a long history and grand challenges still exist in the remote sensing and astro observation fields. In this letter, we try to propose a simple scheme to improve the resolution of imaging through turbulence based on the computational ghost imaging (CGI) and computational ghost diffraction (CGD) setup via the laser beam shaping techniques. A unified theory of CGI and CGD through turbulence with the multi-Gaussian shaped incoherent source is developed, and numerical examples are given to see clearly the effects of the system parameters to CGI and CGD. Our results show that the atmospheric effect to the CGI and CGD system is closely related to the propagation distance between the source and the object. In addition, by properly increasing the beam order of the multi-Gaussian source, we can improve the resolution of CGI and CGD through turbulence relative to the commonly used Gaussian source. Therefore our results may find applications in remote sensing and astro observation.

  14. Groundwater Quality Deterioration due to Municipal Solid Waste Dumping Practices

    Science.gov (United States)

    Parameswari, Kaliyaperumal; Karunakaran, Krishnasamy

    2011-07-01

    Groundwater is the major source of drinking water in both urban and rural India. The demand for water has increased over the years and this has led to water scarcity. The scarcity situation, especially in urban areas, is aggravated by the problem of water pollution or contamination by solid waste dumping. In many urban centers in India, the quality of groundwater is getting severely affected because of the widespread pollution, due to the discharge of untreated waste water in water bodies and leachate from the unscientific disposal of solid wastes. It is necessary to realize the importance of groundwater and preserve its quality through careful monitoring and remediation. This study focuses on the magnitude of groundwater pollution due to improper solid waste dumping practices prevailing in the southern part of the Chennai Metropolitan Area. The Perungudi dumpsite, a solid waste dumping site in the periphery of Chennai city, India, has been chosen for this study. The chemical characteristic of solid waste and leachate has been studied, and the groundwater samples from various locations around the dumpsite were collected and analyzed. Samples were analyzed for pH, electrical conductivity, total dissolved solids, chlorides, sulfate, calcium, magnesium, total hardness, sodium, potassium, BOD, and COD. Heavy metals such as lead, iron, and zinc have been analyzed. The study reveals that most of the groundwater samples do not conform to drinking water quality standards. The study also indicates that groundwater remediation techniques and proper groundwater quality monitoring on a regular basis are of utmost importance in the study area. A few in-situ groundwater remediation technologies have been suggested to improve the present water quality.

  15. Numerical Simulations of Static Tested Ramjet Dump Combustor

    Science.gov (United States)

    Javed, Afroz; Chakraborty, Debasis

    2016-06-01

    The flow field of a Liquid Fuel Ram Jet engine side dump combustor with kerosene fuel is numerically simulated using commercial CFD code CFX-11. Reynolds Averaged 3-D Navier-Stokes equations are solved alongwith SST turbulence model. Single step infinitely fast reaction is assumed for kerosene combustion. The combustion efficiency is evaluated in terms of the unburnt kerosene vapour leaving the combustor. The comparison of measured pressures with computed values show that the computation underpredicts (~5 %) pressures for non reacting cases but overpredicts (9-7 %) for reacting cases.

  16. Optimization of Front Axle Suspension System of Articulated Dump Truck

    DEFF Research Database (Denmark)

    Langer, Thomas Heegaard; Christensen, Brian B.; Mouritsen, Ole Ø.

    2010-01-01

    ongoing research collaboration between Hydrema Produktion A/S, Aalborg University and the University of Agder on comfort improvement. The main goal of the research project is to improve ride comfort of articulated construction machinery by use of multibody simulation models. In this paper the application...... that has been subjected to comfort improvement is a two axle articulated dump truck. The comfort has been in terms of whole body vibration exposure and the overall improvement has been made possible by adding front axle suspension. However, a hydraulic stabilizing system between the tractor and trailer...

  17. Beam dumps, stoppers and Faraday cups at the SLC

    Energy Technology Data Exchange (ETDEWEB)

    Walz, D.R.; McFarlane, A.; Lewandowski, E.

    1989-04-01

    This presentation features most of the beam dumps and stoppers necessary to absorb and dissipate SLC e/sup +-/ beams with transverse sizes from several tens to a few hundred microns (..mu..m). Solutions are based on electromagnetic cascade shower calculations for N = 5 /times/ 10/sup 10/ e/bunch and momenta ranging from 1.2 GeV/c in the damping ring transport systems to 50 GeV/c in the arcs matching sections and the Final Focus region. 3 refs., 2 figs.

  18. The early postprandial dumping syndrome: prevention and treatment.

    Science.gov (United States)

    Woodward, E R; Bushkin, F L

    1976-01-01

    The early postprandial dumping syndrome can be prevented or minimized by the appropriate selection of the operative procedure to fit the patient and the peptic ulcer problem he presents, and by proper attention to diet in the early postoperative period. When it does occur, the syndrome usually responds favorably to dietary management and tends to spontaneously regress in severity with time. For these reasons further surgery is seldom required for the early postprandial dumping syndrome. In the patient who fails to improve with diet therapy and time and has disabling symptoms often accompanied by progressive malnutrition, revisional surgery should be undertaken. It is the objective of the surgeon to alter the reconstruction in such a way that emptying from the stomach or gastric remnant is delayed. Therefore, the upper small intestine dose not receive a large, rapidly introduced hyperosmolar bolus to initiate the release of humoral substances causing the syndrome. All revisions utilized are potentially ulcerogenic and if vagotomy has not been a part of the original procedure, it should routinely be performed at the time of revision. Patients who have primarily has a Billroth II gastrectomy will frequently improve markedly with simple conversion to a Billroth I reconstruction. This is particularly true when the residual stomach is moderately large (i.e., after antrectomy) and when the gastrojejunal stoma is larger in diameter than the normal jejunum. Under such circumstances approximately 80 per cent of patients will improve sufficiently so that a more complex procedure need not be utilized at once. Under all other conditions we prefer a 10 cm. segment of reversed jejunum anastomosed proximally to the gastric stump and distally to a 40 cm. isoperistaltic Roux-en-Y jejunal limb. This procedure is so successful that one can justify its use as first recourse even in the anatomically favorable Billroth II patient. It should be pointed out emphatically that an

  19. Human neutrophils dump Candida glabrata after intracellular killing.

    Science.gov (United States)

    Essig, Fabian; Hünniger, Kerstin; Dietrich, Stefanie; Figge, Marc Thilo; Kurzai, Oliver

    2015-11-01

    Interaction between fungal pathogens and human phagocytes can lead to remarkably variable outcomes, ranging from intracellular killing to prolonged survival and replication of the pathogen in the host cell. Using live cell imaging we observed primary human neutrophils that release phagocytosed Candida glabrata yeast cells after intracellular killing. This process, for which we propose the name "dumping", adds a new outcome to phagocyte-fungus interaction which may be of potential immunological importance as it allows professional antigen presenting cells to take up and process neutrophil-inactivated pathogens that in their viable state are able to evade intracellular degradation in these cells.

  20. Calculation of the energy deposition in a water beam dump

    CERN Document Server

    Schönbacher, Helmut

    1975-01-01

    The energy deposition per interacting proton in GeV/cm/sup 3/ and the star density in star/cm/sup 3/ have been calculated in a water cylinder with a Monte Carlo computer program. These calculations permit the estimation of the temperature rise, induced radioactivity, etc., in beam dumps of high energy accelerator and storage rings. The calculation assumed a cylinder of different diameters and lengths and an incident proton beam energy of 20, 200, 300 and 400 GeV. (5 refs).

  1. Dumped Munitions in the Baltic Sea - Evaluation of the Problem

    Science.gov (United States)

    Beldowski, J.; Jakacki, J.; Vanninen, P.; Lang, T.

    2016-12-01

    Dumped Chemical Weapons pose an actual environmental and security hazard in the Baltic Sea Region. Their actual position is unknown, and pollution originating from corroded munitions is only roughly estimated. Several research projects were devoted to evaluate the magnitude of the problem. During three international projects, roughly 2000 km2 were surveyed, and more than 200 ROV missions were performed to investigate found objects. . Results suggest that munitions containing CWAs are more scattered on the seafloor than suspected, and previously undocumented dumpsite was discovered in Gdansk Deep. Chemical Warfare Agents (CWA) degradation products were found in the sediments in immediate vicinity of the objects, and sediment pollution was observed even at 40m distance. Analysis of CWA degradation products in the sediments showed widespread contamination in Bornholm Deep area, and more variable pattern of local hotspots in the Gotland and Gdansk Deeps. The latter seem to contain several contaminated areas, which identifies it rather as an unofficial dumping ground than only containing munitions originating from en-route dumping. Bottom currents observed in the dumpsites were strong enough for sediment re-suspension, and contributed to the transport of polluted sediments. Spreading of CWA was modelled using POP3 hydrodynamic model augmented with sediment erosion and benthic boundary layer modules. It follows from the models, that depending on wind conditions, resuspended contaminated sediemnts may remain in the water column for several days up to few weeks, and be transported over the distances up to 15 km. Biomarkers of environmental stress were measured in fish from the dumpsites and caged mussels, and indicated environmental stress in organisms from dumpsites as compared to control. Toxicity of found CWA degradation products was examined in laboratory studies. . Nonetheless, both species showed significantly elevated molecular and cellular level responses at

  2. Phase structure of the $O(2)$ ghost model with higher-order gradient term

    CERN Document Server

    Péli, Z; Sailer, K

    2016-01-01

    The phase structure and the infrared behaviour of the Euclidean 3-dimensional $O(2)$ symmetric ghost scalar field model with higher-order derivative term has been investigated in Wegner and Houghton's renormalization group framework. The symmetric phase in which no ghost condensation occurs and the phase with restored symmetry but with a transient presence of a ghost condensate have been identified. Finiteness of the correlation length at the phase boundary hints to a phase transition of first order. The results are compared with those for the ordinary $O(2)$ symmetric scalar field model.

  3. A unifying framework for ghost-free Lorentz-invariant Lagrangian field theories

    CERN Document Server

    Li, Wenliang

    2015-01-01

    We develop a general framework for Lorentz-invariant Lagrangian field theories that leads to second order equations of motion. The key ingredient is the antisymmetric Kronecker delta. Then we reformulate the general ghost-free Lagrangians in the language of differential forms. The absence of higher order equations of motion stems from the basic fact that every exact form is closed. All known ghost-free Lagrangian theories for spin-0, spin-1, spin-2 fields have natural formulations in this framework. We propose new ghost-free Lagrangians, for example, novel nonlinear kinetic terms for graviton.

  4. Ameloblastic fibroma with ghost cell differentiation and calcification: A unique case report.

    Science.gov (United States)

    Arora, Manpreet; Dave, Aparna; Shetty, Vishwaprakash; Saluja, Pulin

    2015-01-01

    The ameloblastic fibroma (AF) is an uncommon odontogenic tumor that may present an aggressive behavior and may have potential for malignant transformation. Ghost cell differentiation within AF is extremely rare. There are only seven cases in English literature in which ghost cells are found in AF but all these previously reported cases were associated with typical calcifying odontogenic cyst. Here, we present a unique case in 3(1/2)-year-old child with solid lesion which comprised odontogenic epithelium strands, islands, and myxoid ectomesenchyme with focal areas of ghost cell differentiation and calcification associated with neoplastic epithelium.

  5. Ameloblastic fibroma with ghost cell differentiation and calcification: A unique case report

    Directory of Open Access Journals (Sweden)

    Manpreet Arora

    2015-01-01

    Full Text Available The ameloblastic fibroma (AF is an uncommon odontogenic tumor that may present an aggressive behavior and may have potential for malignant transformation. Ghost cell differentiation within AF is extremely rare. There are only seven cases in English literature in which ghost cells are found in AF but all these previously reported cases were associated with typical calcifying odontogenic cyst. Here, we present a unique case in 31/2-year-old child with solid lesion which comprised odontogenic epithelium strands, islands, and myxoid ectomesenchyme with focal areas of ghost cell differentiation and calcification associated with neoplastic epithelium.

  6. Ghosts in the self-accelerating DGP branch with Gauss–Bonnet effect

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Yen-Wei; Izumi, Keisuke; Bouhmadi-López, Mariam; Chen, Pisin

    2015-06-01

    The Dvali–Gabadadze–Porrati brane-world model provides a possible approach to address the late-time cosmic acceleration. However, it has subsequently been pointed out that a ghost instability will arise on the self-accelerating branch. Here, we carefully investigate whether this ghost problem could be possibly cured by introducing the Gauss–Bonnet term in the five-dimensional bulk action, a natural generalization to the Dvali–Gabadadze–Porrati model. Our analysis is carried out for a background where a de Sitter brane is embedded in an anti–de Sitter bulk. Our result shows that the ghost excitations cannot be avoided even in this modified model.

  7. Biconcave shape of human red-blood-cell ghosts relies on density differences between the rim and dimple of the ghost's plasma membrane.

    Science.gov (United States)

    Hoffman, Joseph F

    2016-12-20

    The shape of the human red blood cell is known to be a biconcave disk. It is evident from a variety of theoretical work that known physical properties of the membrane, such as its bending energy and elasticity, can explain the red-blood-cell biconcave shape as well as other shapes that red blood cells assume. But these analyses do not provide information on the underlying molecular causes. This paper describes experiments that attempt to identify some of the underlying determinates of cell shape. To this end, red-blood-cell ghosts were made by hypotonic hemolysis and then reconstituted such that they were smooth spheres in hypo-osmotic solutions and smooth biconcave discs in iso-osmotic solutions. The spherical ghosts were centrifuged onto a coated coverslip upon which they adhered. When the attached spheres were changed to biconcave discs by flushing with an iso-osmotic solution, the ghosts were observed to be mainly oriented in a flat alignment on the coverslip. This was interpreted to mean that, during centrifugation, the spherical ghosts were oriented by a dense band in its equatorial plane, parallel to the centrifugal field. This appears to be evidence that the difference in the densities between the rim and the dimple regions of red blood cells and their ghosts may be responsible for their biconcave shape.

  8. Ghost Fano Resonance of Excitons in Twisted Bilayer Graphene

    Science.gov (United States)

    Liang, Yufeng

    2014-03-01

    Metallic systems are generally considered to be unable to harbor tightly bound excitons because of the strong screening effect as well as the absence of a finite band gap. Previously, exception has only been found in one-dimensional metallic carbon nanotubes due to the depressed screening effects and the symmetry gap. We explore the exciton spectra of twisted bilayer graphene (tBLG) and predict the existence of even more strongly bound exciton (with binding energy as large as 0.5eV) in this system despite of its higher dimensionality. Based on our results from first-principles simulations and effective model calculations, a mechanism known as the ghost Fano resonance is proposed for the bound exciton formation in metallic systems beyond the dimensonality-related argument. Our results shed light on engineering the e-h excitations in the few-layer van der Waals heterojunction. NSF Grant No. DMR-1207141.

  9. Pulse-compression ghost imaging lidar via coherent detection

    CERN Document Server

    Deng, Chenjin; Han, Shensheng

    2016-01-01

    Ghost imaging (GI) lidar, as a novel remote sensing technique,has been receiving increasing interest in recent years. By combining pulse-compression technique and coherent detection with GI, we propose a new lidar system called pulse-compression GI lidar. Our analytical results, which are backed up by numerical simulations, demonstrate that pulse-compression GI lidar can obtain the target's spatial intensity distribution, range and moving velocity. Compared with conventional pulsed GI lidar system, pulse-compression GI lidar, without decreasing the range resolution, is easy to obtain high single pulse energy with the use of a long pulse, and the mechanism of coherent detection can eliminate the influence of the stray light, which can dramatically improve the detection sensitivity and detection range.

  10. Ghost imaging protocol for magneto-optical applications

    CERN Document Server

    Meda, A; Avella, A; Berchera, I Ruo; Degiovanni, I P; Magni, A; Genovese, M

    2015-01-01

    We develop a new approach in magneto-optical imaging (MOI), applying for the first time a ghost imaging (GI) protocol to perform Faraday microscopy. MOI is one of the most exploited technique for the study of magnetic properties of a material, through Weiss domains form, distribution and dimension analysis. Nevertheless, a lack of imaging of domains in some extreme conditions as cryogenic temperatures or high magnetic fields application is present due to the difficulties related to the imaging setup construction limitation. Here we present a technique that separates the imaging optical path to the one illuminating the object. The technique is based on thermal light GI and exploits correlations between light beams. GI is applied to the Faraday magneto-optical observation of magnetic domains of an Yttrium Iron Garnet (YIG) sample.

  11. Pulse-compression ghost imaging lidar via coherent detection.

    Science.gov (United States)

    Deng, Chenjin; Gong, Wenlin; Han, Shensheng

    2016-11-14

    Ghost imaging (GI) lidar, as a novel remote sensing technique, has been receiving increasing interest in recent years. By combining pulse-compression technique and coherent detection with GI, we propose a new lidar system called pulse-compression GI lidar. Our analytical results, which are backed up by numerical simulations, demonstrate that pulse-compression GI lidar can obtain the target's spatial intensity distribution, range and moving velocity. Compared with conventional pulsed GI lidar system, pulse-compression GI lidar, without decreasing the range resolution, is easy to obtain high single pulse energy with the use of a long pulse, and the mechanism of coherent detection can eliminate the influence of the stray light, which is helpful to improve the detection sensitivity and detection range.

  12. Research on ghost imaging method based on wavelet transform

    Science.gov (United States)

    Li, Mengying; He, Ruiqing; Chen, Qian; Gu, Guohua; Zhang, Wenwen

    2017-09-01

    We present an algorithm of extracting the wavelet coefficients of object based on ghost imaging (GI) system. Through modification of the projected random patterns by using a series of templates, wavelet transform GI (WTGI) can directly measure the high frequency components of wavelet coefficients without needing the original image. In this study, we theoretically and experimentally perform the high frequency components of wavelet coefficients detection with an arrow and a letter A based on GI and WTGI. Comparing with the traditional method, the use of the algorithm proposed in this paper can significantly improve the quality of the image of wavelet coefficients in both cases. The special advantages of GI will make the wavelet coefficient detection based on WTGI very valuable in real applications.

  13. Spectral Camera based on Ghost Imaging via Sparsity Constraints

    CERN Document Server

    Liu, Zhentao; Wu, Jianrong; Li, Enrong; Shen, Xia; Han, Shensheng

    2015-01-01

    The information acquisition ability of conventional camera is far lower than the Shannon Limit because of the correlation between pixels of image data. Applying sparse representation of images to reduce the abundance of image data and combined with compressive sensing theory, the spectral camera based on ghost imaging via sparsity constraints (GISC spectral camera) is proposed and demonstrated experimentally. GISC spectral camera can acquire the information at a rate significantly below Nyquist, and the resolution of the cells in the three-dimensional (3D) spectral image data-cube can be achieved with a two-dimensional (2D) detector in a single exposure. For the first time, GISC spectral camera opens the way of approaching the Shannon Limit determined by Information Theory in optical imaging instruments.

  14. Ghosts, UFOs, and magic: positive affect and the experiential system.

    Science.gov (United States)

    King, Laura A; Burton, Chad M; Hicks, Joshua A; Drigotas, Stephen M

    2007-05-01

    Three studies examined the potential interactions of the experiential system and positive affect (PA) in predicting superstitious beliefs and sympathetic magic. In Study 1, experientiality and induced positive mood interacted to predict the emergence of belief in videos purporting to show unidentified flying objects or ghosts. In Study 2, naturally occurring PA interacted with experientiality to predict susceptibility to sympathetic magic, specifically difficulty in throwing darts at a picture of a baby (demonstrating the law of similarity). In Study 3, induced mood interacted with experientiality to predict sitting farther away from, and expressing less liking for, a partner who had stepped in excrement (demonstrating the law of contagion). Results are interpreted as indicating that PA promotes experiential processing. Implications for the psychology of nonrational beliefs and behaviors are discussed.

  15. Anisotropic Generalized Ghost Pilgrim Dark Energy Model in General Relativity

    Science.gov (United States)

    Santhi, M. Vijaya; Rao, V. U. M.; Aditya, Y.

    2017-02-01

    A spatially homogeneous and anisotropic locally rotationally symmetric (LRS) Bianchi type- I Universe filled with matter and generalized ghost pilgrim dark energy (GGPDE) has been studied in general theory of relativity. To obtain determinate solution of the field equations we have used scalar expansion proportional to the shear scalar which leads to a relation between the metric potentials. Some well-known cosmological parameters (equation of state (EoS) parameter ( ω Λ), deceleration parameter ( q) and squared speed of sound {vs2}) and planes (ω _{Λ }-dot {ω }_{Λ } and statefinder) are constructed for obtained model. The discussion and significance of these parameters is totally done through pilgrim dark energy parameter ( β) and cosmic time ( t).

  16. Spectral Camera based on Ghost Imaging via Sparsity Constraints

    Science.gov (United States)

    Liu, Zhentao; Tan, Shiyu; Wu, Jianrong; Li, Enrong; Shen, Xia; Han, Shensheng

    2016-05-01

    The image information acquisition ability of a conventional camera is usually much lower than the Shannon Limit since it does not make use of the correlation between pixels of image data. Applying a random phase modulator to code the spectral images and combining with compressive sensing (CS) theory, a spectral camera based on true thermal light ghost imaging via sparsity constraints (GISC spectral camera) is proposed and demonstrated experimentally. GISC spectral camera can acquire the information at a rate significantly below the Nyquist rate, and the resolution of the cells in the three-dimensional (3D) spectral images data-cube can be achieved with a two-dimensional (2D) detector in a single exposure. For the first time, GISC spectral camera opens the way of approaching the Shannon Limit determined by Information Theory in optical imaging instruments.

  17. Spectral Camera based on Ghost Imaging via Sparsity Constraints.

    Science.gov (United States)

    Liu, Zhentao; Tan, Shiyu; Wu, Jianrong; Li, Enrong; Shen, Xia; Han, Shensheng

    2016-05-16

    The image information acquisition ability of a conventional camera is usually much lower than the Shannon Limit since it does not make use of the correlation between pixels of image data. Applying a random phase modulator to code the spectral images and combining with compressive sensing (CS) theory, a spectral camera based on true thermal light ghost imaging via sparsity constraints (GISC spectral camera) is proposed and demonstrated experimentally. GISC spectral camera can acquire the information at a rate significantly below the Nyquist rate, and the resolution of the cells in the three-dimensional (3D) spectral images data-cube can be achieved with a two-dimensional (2D) detector in a single exposure. For the first time, GISC spectral camera opens the way of approaching the Shannon Limit determined by Information Theory in optical imaging instruments.

  18. F-theory with zeroth-quantized ghosts

    CERN Document Server

    Siegel, W

    2016-01-01

    F-theory in its most general sense should be a theory defined on a worldvolume of higher dimension than the worldsheet, that reproduces string results perturbatively but includes nonperturbative supergravity solutions at the first-quantized level. This implies that in some sense it should contain the same oscillator modes as the string but an enlarged set of zero-modes. In this paper we concentrate on the higher-dimensional properties of the worldvolume (rather than those of spacetime): "Ghost" dimensions are added to the worldvolume, as might be expected in a "zeroth-quantized" approach to the constraints on its higher bosonic dimensions, by adding equal numbers of bosonic and fermionic dimensions to the worldsheet.

  19. Spherically Symmetric Solutions in Ghost-Free Massive Gravity

    CERN Document Server

    Comelli, D; Nesti, F; Pilo, L

    2011-01-01

    Recently, a class of theories of massive gravity has been shown to be ghost-free. We study the spherically symmetric solutions in the bigravity formulation of such theories. In general, the solutions admit both a Lorentz invariant and a Lorentz breaking asymptotically flat behaviour and also fall in two branches. In the first branch, all solutions can be found analitycally and are Schwarzschild-like, with no modification as is found for other classes of theories. In the second branch, exact solutions are hard to find, and relying on perturbation theory, Yukawa-like modifications of the static potential are found. The general structure of the solutions suggests that the bigravity formulation of massive gravity is crucial and more than a tool.

  20. Constraint on ghost-free bigravity from gravitational Cherenkov radiation

    Science.gov (United States)

    Kimura, Rampei; Tanaka, Takahiro; Yamamoto, Kazuhiro; Yamashita, Yasuho

    2016-09-01

    We investigate gravitational Cherenkov radiation in a healthy branch of background solutions in the ghost-free bigravity model. In this model, because of the modification of dispersion relations, each polarization mode can possess subluminal phase velocities, and the gravitational Cherenkov radiation could be potentially emitted from a relativistic particle. In the present paper, we derive conditions for the process of the gravitational Cherenkov radiation to occur and estimate the energy emission rate for each polarization mode. We found that the gravitational Cherenkov radiation emitted even from an ultrahigh energy cosmic ray is sufficiently suppressed for the graviton's effective mass less than 100 eV, and the bigravity model with dark matter coupled to the hidden metric is therefore consistent with observations of high energy cosmic rays.

  1. Constraint on ghost-free bigravity from gravitational Cherenkov radiation

    CERN Document Server

    Kimura, Rampei; Yamamoto, Kazuhiro; Yamashita, Yasuho

    2016-01-01

    We investigate gravitational Cherenkov radiation in a healthy branch of background solutions in the ghost-free bigravity model. In this model, because of the modification of dispersion relations, each polarization mode can possess subluminal phase velocities, and the gravitational Cherenkov radiation could be potentially emitted from a relativistic particle. In the present paper, we derive conditions for the process of the gravitational Cherenkov radiation to occur and estimate the energy emission rate for each polarization mode. We found that the gravitational Cherenkov radiation emitted even from an ultrahigh energy cosmic ray is sufficiently suppressed for the graviton's effective mass less than $100\\,{\\rm eV}$, and the bigravity model with dark matter coupled to the hidden metric is therefore consistent with observations of high energy cosmic rays.

  2. [Changes produce old ghosts anew--the insecure Europe].

    Science.gov (United States)

    Beland, H

    1993-04-01

    Since the fall of the Berlin Wall and the collapse of existing socialist dictatorships, some of the ghosts that we thought to have long since exorcised have returned to haunt us anew-aggressive forms of nationalism, which we have turned a blind eye to for decades, and a violent species of xenophobia on occasion openly homicidal in nature are prominent features of present-day European reality. In Beland's view, such alarming phenomena can only be controlled successfully if we can contrive-both on an individual and collective plan- to de-activate the psychic mechanism of projecting our own evils and flaws onto others (i.e. "foreigners") and to achieve what Melanie Klein calls the "depressive position", i.e. attain to a higher guilt tolerance. This, Beland contends, is the central utopia of European humanism.

  3. 19 CFR 159.58 - Dumping and countervailing duties; action by port director.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 2 2010-04-01 2010-04-01 false Dumping and countervailing duties; action by port director. 159.58 Section 159.58 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND... Dumping and countervailing duties; action by port director. (a) Antidumping matters. Upon receipt...

  4. Environmental impact of differently remediated hard coal overburden and tailings dumps a few decades after remediation

    Energy Technology Data Exchange (ETDEWEB)

    Willscher, S. [Technical Univ. of Dresden (Germany). Inst. of Waste Management and Contaminated Site Treatment; Hertwig, T. [BEAK Consultants GmbH, Freiburg (Germany); Felix, M.; Sohr, A. [Saxonian State Dept. of Environment, Agriculture and Geology, Freiburg (Germany)

    2010-07-01

    Coal mining in the Saxony region of Germany has caused heavy metal and arsenic pollution in adjacent groundwater and surface waters. Coal waste dumping sites are leaching heavy metals and metalloids in the form of fine precipitates into local rivers. This paper studied the different remediation strategies used at 3 different dump sites in the area. The aim of the study was to determine the environmental impact of the dumps and evaluate the long-term effects of remediation measures. The dumps consisted of coarse to fine-grained materials from former processing activities, and contained pyrite in varying concentrations. Samples from different depth as well as groundwater samples were taken from the sites and investigated for their mechanical, geological, geochemical, biogeochemical, and physico-chemical characteristics. Seepage formation rates and contaminant loads at the dump sites were compared. The study showed that the revegetation of dump surfaces can help to prevent against erosion, but cannot prevent acid mine drainage (AMD) generation. The additional seals and covers placed at 2 of the dumps resulted in a high reduction of seepage waters, and almost no acidification of dump materials. 5 refs., 1 fig.

  5. Regularities of restoration of plant cover on the dumps of the Kuznetsk Basin

    Directory of Open Access Journals (Sweden)

    A. N. Kupriyanov

    2016-04-01

    Full Text Available The article considers the issues of the restoration vegetation on the dumps of the coal enterprises of the Kuznetsk Basin. Studies have shown that the dumps have a wide range of environmental conditions and are potentially suitable for establishment of plants. To negative environmental factors at the mine dumps include the lack of productive moisture, failed penetration, contrasting temperature regime on the different elements of the relief, and low potential fertility of the embryonic soils. Positive – high humidity in the depressions, the high content of fine-grained deposits in the lower part of the elephant dumps, excessive accumulation of snow in the winter on separate dumping sites. On disturbed lands identified eight technogenic ecotopes, characterized by various microrelief, moisture level, amount of fine fractions of technogenic eluvium determining favorable, moderately favorable and unfavorable conditions for vegetation of disturbed land. Selected three stages of syngenesis: pioneer stage, simple plant communities and complex plant communities. The stage of zonal phytocenosis on the dumps was not detected. The basis of diagnostic signs consists of the projective cover, the nature of the host plants, the number of species part of the zonal species. The selected criteria are universal and can be applicable to most dumps. Speed of syngenetic succession does not depend on calendar age of the dumps, and environmental conditions, which are formed on separate sites.

  6. Københavns Kommunes indsats mod social dumping - målopfyldelsesevaluering

    DEFF Research Database (Denmark)

    Jørgensen, Henning; Baadsgaard, Kelvin

    2017-01-01

    Evaluering af indsatsen i Københavns Kommune for at imødegå social dumping ved hjælp af målopfyldelses-model......Evaluering af indsatsen i Københavns Kommune for at imødegå social dumping ved hjælp af målopfyldelses-model...

  7. Anti-Dumping with Heterogeneous Firms: New Protectionism for the New-New Trade Theory

    DEFF Research Database (Denmark)

    Schmidt, Christian Gormsen

    This paper analyzes anti­-dumping (AD) policies in a two-country model with heterogeneous firms in monopolistic competition. Effective AD legislation in one country imposes a no-dumping condition on firms exporting from the other country, altering their pricing both domestically and abroad. Some...

  8. 77 FR 61818 - WTO Dispute Settlement Proceeding Regarding United States-Anti-Dumping and Countervailing Duties...

    Science.gov (United States)

    2012-10-11

    ... From the Federal Register Online via the Government Publishing Office ] OFFICE OF THE UNITED STATES TRADE REPRESENTATIVE WTO Dispute Settlement Proceeding Regarding United States--Anti- Dumping and...-dumping and countervailing duties on certain automobiles from the United States. That request may be...

  9. 75 FR 33747 - Ocean Dumping; Correction of Typographical Error in 2006 Federal Register Final Rule for...

    Science.gov (United States)

    2010-06-15

    ... From the Federal Register Online via the Government Publishing Office ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 228 Ocean Dumping; Correction of Typographical Error in 2006 Federal Register Final... Final Rule for the Ocean Dumping; De-designation of Ocean Dredged Material Disposal Site and...

  10. Octreotide improves early dumping syndrome potentially through incretins: a case report.

    Science.gov (United States)

    Sato, Daisuke; Morino, Katsutaro; Ohashi, Natsuko; Ueda, Emi; Ikeda, Kazuhiro; Yamamoto, Hideka; Ugi, Satoshi; Yamamoto, Hiroshi; Araki, Shinichi; Maegawa, Hiroshi

    2013-01-01

    Dumping syndrome, or rapid gastric emptying, is a frequent complication after gastric surgery. In this case, the patient was a 47-year-old woman who 10 years previously had undergone distal gastrectomy with Billroth I reconstruction for early-stage gastric cancer. She presented with symptoms of weakness, headache, palpitation, sweating, dizziness and significant fatigue between one and two hours after a meal. Because a 75 g oral glucose tolerance test (75 g-OGTT) induced both acute postprandial tachycardia (within 1 hour) and postprandial hypoglycemia, we diagnosed this patient with early and late dumping syndrome. Dietary measures and acarbose improved symptoms of late dumping syndrome but did not prevent the symptoms of early dumping syndrome such as postprandial tachycardia, weakness, headache, palpitation, and dizziness. We therefore used the somatostatin analogue octreotide, which has been reported as an effective therapy for early dumping syndrome. Octreotide prevented the symptoms of early dumping syndrome, especially postprandial tachycardia, but caused postprandial hyperglycemia. Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) were completely suppressed during the 75 g-OGTT following subcutaneous injection of octreotide. No change was observed in vasoactive intestinal polypeptide (VIP), which is the gastrointestinal peptide hormone generally responsible for early dumping syndrome, suggesting possible contribution of incretins in early dumping syndrome of this patient.

  11. Stability analysis and treatment of No.2 dump of Nanfen iron mine

    Institute of Scientific and Technical Information of China (English)

    Yan XU; Lei NIE; Huangping DING; Yin WANG; Jian LIU; Wei LU; Zhenying ZHANG; Xue GONG; Shiwei SHEN

    2006-01-01

    On the basis of the study on the engineering geological characteristics of No.2 dump of Nanfen iron mine and the analysis of the failure mode of dump landslide, the stability of the present dump, the stability of the dump 20 years later and the stability of double-bench dump are analyzed. Then, the debris flow risk is evaluated by fuzzy mathematics method. Finally, the comprehensive treatment for the dump is suggested. It is concluded that ① In rainy and snowmelt period, the stability would be decreasing sharply when ground water is not drained out in time; ② Double-bench dumping mode will improve stability of the dump little; ③ Debris flow risk is middle danger. The interim debris flow with medium scale may occur. ④ Monitoring, draining and baffling work ought to be well done. ⑤ In order to prevent the damage of landslide and debris flow, three measures are adopted, including setting rockfall net, setting the debris flow barrier and removing the residents.

  12. Solution of the capacity increase of the waste dump at the Merkur surface mine in Czechoslovakia

    Energy Technology Data Exchange (ETDEWEB)

    Musil, P.

    1987-06-01

    The methods used in the past for backfilling the large dump at the Merkur surface mine have, due to an ignorance of the factors influencing dump stability, resulted in significant capacity reductions of the dump. This ignorance was the result of insufficient knowledge, research, and poor practice at the operation. Recent re-evaluation of the actual stability conditions has led to a solution which permits an increase in the dump capacity, such that it is compatible with future mining plans. By considering the structure of the soils being used as backfill, specific technological processes are being defined which enable the preservation of the highest possible shear strength of the clayey soils, and thereby maximize the utilization of the internal capacity with at least short term stability. Questions regarding the behaviour and properties of the loose clayey material are also being answered, and new methods of stability calculation for the high dump are being developed. The key to these solutions has been the knowledge gained regarding the shear strength of the loose clayey material under various effective stress conditions, while realizing that three different zones can exist simultaneously within the body of the dump: the slope areas (having the greatest failure-inducing stress), the temporary areas (having a somewhat lower applied stress), and the dump core (where the tendency to fail is nearly zero). Through a sound application of this knowledge, the capacity of the waste dump at the large Merkur surface mine has been adequately expanded for the future.

  13. Radiation monitoring and beam dump system of the OPAL silicon microvertex detector

    CERN Document Server

    Braibant, S

    1997-01-01

    The OPAL microvertex silicon detector radiation monitoring and beam dump system is described. This system was designed and implemented in order to measure the radiation dose received at every beam crossing and to induce a fast beam dump if the radiation dose exceeds a given threshold.

  14. Joint Norwegian-Russian mission to investigate dumped atomic waste in the Kara Sea

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2012-11-01

    In autumn 2012, a joint Norwegian-Russian mission will visit areas in the Kara Sea where spent nuclear fuel and radioactive waste have been dumped. The purpose of the mission is to obtain new, up-to-date information about radioactive pollution in these areas and about the condition of the dumped items (Author)

  15. Soil contamination by brominated flame retardants in open waste dumping sites in Asian developing countries.

    Science.gov (United States)

    Eguchi, Akifimi; Isobe, Tomohiko; Ramu, Karri; Tue, Nguyen Minh; Sudaryanto, Agus; Devanathan, Gnanasekaran; Viet, Pham Hung; Tana, Rouch Seang; Takahashi, Shin; Subramanian, Annamalai; Tanabe, Shinsuke

    2013-03-01

    In Asian developing countries, large amounts of municipal wastes are dumped into open dumping sites each day without adequate management. This practice may cause several adverse environmental consequences and increase health risks to local communities. These dumping sites are contaminated with many chemicals including brominated flame retardants (BFRs) such as polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecanes (HBCDs). BFRs may be released into the environment through production processes and through the disposal of plastics and electronic wastes that contain them. The purpose of this study was to elucidate the status of BFR pollution in municipal waste dumping sites in Asian developing countries. Soil samples were collected from six open waste dumping sites and five reference sites in Cambodia, India, Indonesia, Malaysia, and Vietnam from 1999 to 2007. The results suggest that PBDEs are the dominant contaminants in the dumping sites in Asian developing countries, whereas HBCD contamination remains low. Concentrations of PBDEs and HBCDs ranged from ND to 180 μg/kg dry wt and ND to 1.4 μg/kg dry wt, respectively, in the reference sites and from 0.20 to 430 μg/kg dry wt and ND to 2.5 μg/kg dry wt, respectively, in the dumping sites. Contamination levels of PBDEs in Asian municipal dumping sites were comparable with those reported from electronic waste dismantling areas in Pearl River delta, China.

  16. Experimental Study of Preferential Solute Transportation During Dump Leaching

    Institute of Scientific and Technical Information of China (English)

    YIN Sheng-hua; WU Ai-xiang

    2006-01-01

    The production of dump leaching of the Dexing Copper Mine was affected by a preferential solution flow. Formative mechanism of the preferential solution flow was investigated by analyzing the relationship between both dump permeability and surface tension and ore diameter. The preferential solution flow occurred in the fine ore area when the application rate was low. The preferential solution flow entered into the coarse ore area because the negative pore water pressure disappeared with an increase of the application rate. The preferential solute transportation experiment was conducted by selecting NaCl as mineral. Results of the experiment showed that the concentration of the outflow solution reduced over time. The concentration of the coarse ore area outflow solution was greater than that of the fine ore area. The process of NaCl leaching can be divided into two stages. NaCl was carried out directly by diffusion-convection during the first stage, so the leaching rate increased sharply. But in the second stage, only a small amount of NaCl dissolved in the immobile water. The leaching rate increased slowly because NaCl, dissolved in the immobile water, can only be leached by diffusion.

  17. Sequential extraction of inorganic mercury in dumped blast furnace sludge.

    Science.gov (United States)

    Földi, Corinna; Andrée, Corlin-Anna; Mansfeldt, Tim

    2015-10-01

    Blast furnace sludge (BFS) is an industrial waste with elevated mercury (Hg) contents due to the enrichment during the production process of pig iron. To investigate the potential pollution status of dumped BFS, 14 samples with total Hg contents ranging from 3.91 to 20.8 mg kg(-1) from five different locations in Europe were sequentially extracted. Extracts used included demineralized water (fraction 1, F1), 0.1 mol L(-1) CH3COOH + 0.01 mol L(-1) HCl (F2), 1 mol L(-1) KOH (F3), 7.9 mol L(-1) HNO3 (F4), and aqua regia (F5). The total recovery ranged from 72.3 to 114 %, indicating that the procedure was reliable when adapted to this industrial waste. Mercury mainly resided in the fraction of "elemental" Hg (48.5-98.8 %) rather being present as slightly soluble Hg species associated with sludge particles. Minor amounts were found as mercuric sulfide (F5; 0.725-37.3 %) and Hg in crystalline metal ores and silicates (F6; 2.21-15.1 %). The ecotoxically relevant fractions (F1 and F2) were not of significance (F1, dumped for many years has a rather low environmental risk potential regarding Hg.

  18. Municipal solid waste open dumping, implication for land degradation

    Science.gov (United States)

    Yazdani, M.; Monavari, M.; Omrani, G. A.; Shariat, M.; Hosseini, M.

    2015-03-01

    Open dumping is the common procedure for final disposal of MSW in Iran. Several environmental pollutions and land degradation have caused because of poor planning, insufficient financial resources, improper organizational chart for MSW management system, and the lack of rules, guidelines and regulations. In Iran standards and regulations of environmental issues are not perfectly attended, evaluation an open dumping can show existing restrictions and troubles in these areas. So recognition of the municipal solid waste landfill state is required to prevent the increase of environmental problems and decrease the negative environmental impacts. The suitability of Tonekabon existing municipal landfill site in the west area of Mazandaran province, located in north of Iran, and the south coast of the Caspian Sea is the significance of the present study as a case study of land degradation. In order to carry out this evaluation, two guidelines are used. After reviewing all the considered criteria in each of the guidelines, the authenticity of the deposit site of the study area and also the entire city was examined; and eventually the appropriate areas were identified. The conclusion of the results indicated the incoherence in appropriateness of the existing landfill site, with two mentioned methods and field work.

  19. ASPECTS OF REHABILITATION OF WASTE DUMPS USING HERBACEOUS PLANTS

    Directory of Open Access Journals (Sweden)

    Smaranda Masu

    2015-05-01

    Full Text Available There are many arguments that underlie research on rehabilitation of large areas of land that were set aside from the agricultural circuit and became heaps of storage for inert waste materials like bottom and boiler slag and fly ash. On the other hand result of biological materials with potential for land recycling i.e. sewage sludge. On the dumps of boiler slag composed of particles of 2-3 mm was gradually installed a layer of grass with the help of sewage sludge as a fertilizing agent and microbial activity stimulating agent, based on an extract of brown seaweed EKO GEA Slovenia. In the second year the amount of biomass harvested was 2 to 2.9 times higher than in the first year of cultivation. Moreover plants not harvested in the second year of culture bore fruit. Also, the root network strongly stabilized the slag and boiler ash particles against land spreading. Rapid and effective rehabilitation of the landscape destroyed was achieved with the use of herbaceous crops of the species Lolium perenne. Monitoring bioaccumulation of heavy metals i.e. Cd, Cr, Cu, Ni, Pb, Ni, Zn, etc. in aerial plant tissue was needed to decide the sector where the biomass harvested from inert waste dump covered with vegetation.

  20. Radiation Protection Studies for LCLS Tune Up Dump

    Energy Technology Data Exchange (ETDEWEB)

    Santana-Leitner, M.; Fass, A.; Mao, S.; Nuhn, H.D.; /SLAC; Roesler, S.; /CERN; Rokni, S.; Vollaire, J.; /SLAC

    2010-04-29

    The Linac Coherent Light Source (LCLS) at the Stanford Linear Accelerator Center is a pioneer fourth generation hard x-ray free electron laser that shall start to deliver laser pulses in 2009. Among other components of LCLS that present radiation protection concerns, the tune up dump (tdund) is of special interest because it also constitutes an issue for machine protection, as it is placed close to radiation sensitive components, like electronic devices and permanent magnets in the undulators. This paper first introduces the stopper of tdund looking at the heat load, and then it describes the shielding around the dump necessary to maintain the prompt and residual dose within design values. Next, preliminary comparisons of the magnetization loss in a dedicated on-site magnet irradiation experiment with FLUKA simulations serve to characterize the magnetic response to radiation of magnets like those of LCLS. The previous knowledge, together with the limit for the allowed demagnetization, are used to estimate the lifetime of the undulator. Further simulations provide guidelines on which lifetime can be expected for an electronic device placed at a given distance of tdund.

  1. Enhancing Tomo-PIV reconstruction quality by reducing ghost particles

    Science.gov (United States)

    de Silva, C. M.; Baidya, R.; Marusic, I.

    2013-02-01

    A technique to enhance the reconstruction quality and consequently the accuracy of the velocity vector field obtained in Tomo-PIV experiments is presented here. The methodology involves detecting and eliminating spurious outliers in the reconstructed intensity field (ghost particles). A simulacrum matching-based reconstruction enhancement (SMRE) technique is proposed, which utilizes the characteristic shape and size of actual particles to remove ghost particles in the reconstructed intensity field. An assessment of SMRE is performed by a quantitative comparison of Tomo-PIV simulation results and DNS data, together with a comparison to Tomo-PIV experimental data measured in a turbulent channel flow at a matched Reynolds number (Reτ = 937) to the DNS study. For the simulation data, a comparative study is performed on the reconstruction quality based on an ideal reconstruction determined from known particle positions. The results suggest that a significant improvement in the reconstruction quality and flow statistics is achievable at typical seeding densities used in Tomo-PIV experiments. This improvement is further amplified at higher seeding densities, enabling the use of up to twice the typical seeding densities currently used in Tomo-PIV experiments. A reduction of spurious vectors present in the velocity field is also observed based on a median outlier detection criterion. The application of SMRE to Tomo-PIV experimental data shows an improvement in flow statistics, comparable to the improvement seen in simulations. Finally, due to the non-iterative nature of SMRE, the increase in processing time is marginal since only a single pass of the reconstruction algorithm is required.

  2. Design of Condition Monitoring System for Motor Wheel Dump Trucks Based on CAN Bus%基于CAN总线的电动轮自卸车运行状态监测系统设计

    Institute of Scientific and Technical Information of China (English)

    何艳芳; 刘德顺; 陈晓可

    2011-01-01

    According to the requirements of remote monitoring and intelligent diagnostics for dump trucks,a dump truck condition monitoring system based on CAN bus was designed for 154T mining motor wheel dump truck. This paper introduced an embedded operating system DSP/BIOS,took digital signal controller TMS320F2812 as the core,realized real-time communication between the main monitor and the dump truck controller through CAN network. This system can collect the running parameters of each system in the dump truck,an integrated treatment of data transmitted to host computer and the LCD screen. The system solves the problems on the centralized collection of scattered signal for complex system,and lays the foundation for the dump truck's remote monitoring,fault prediction and diagnosis.%根据自卸车状态监控与智能诊断的需要,针对某公司的154T交流电传动电动轮自卸车,设计了一种基于CAN总线的自卸车运行状态监测系统.文中以数字信号处理器TMS320F2812为核心,引入嵌入式操作系统DSP/BIOS,通过CAN网络实现了主监测器与自卸车内部控制系统的实时通信,采集的状态参数进行数据处理后传至上位机及液晶显示屏.该系统不仅解决了复杂系统的分散信号集中采集的难题,也为自卸车的远程监控、故障预测与诊断奠定了基础.

  3. A review of ghost gear entanglement amongst marine mammals, reptiles and elasmobranchs.

    Science.gov (United States)

    Stelfox, Martin; Hudgins, Jillian; Sweet, Michael

    2016-10-15

    This review focuses on the effect that ghost gear entanglement has on marine megafauna, namely mammals, reptiles and elasmobranchs. A total of 76 publications and other sources of grey literature were assessed, and these highlighted that over 5400 individuals from 40 different species were recorded as entangled in, or associated with, ghost gear. Interestingly, there appeared to be a deficit of research in the Indian, Southern, and Arctic Oceans; and so, we recommend that future studies focus efforts on these areas. Furthermore, studies assessing the effects of ghost gear on elasmobranchs, manatees, and dugongs should also be prioritised, as these groups were underrepresented in the current literature. The development of regional databases, capable of recording entanglement incidences following a minimum global set of criteria, would be a logical next step in order to analyse the effect that ghost gear has on megafauna populations worldwide.

  4. Ghost cell odontogenic tumor associated with odontoma--report of two rare cases.

    Science.gov (United States)

    Hogge, Maritzabel; Velez, Ines; Kaltman, Steven; Movahed, Reza; Yeh, Frank

    2012-01-01

    The ghost cell odontogenic tumor (GCOT) is a neoplastic/cystic lesion with a diverse histopathological and clinical behavior It was formerly known as calcified odontogenic cyst, but in 2005 the World Health Organization categorized this lesion as an odontogenic, benign tumor rather than a cyst; nominating this neoplasm as calcifying cystic odontogenic tumor. A later comprehensive classification named it ghost cell odontogenic tumor because the most remarkable histopathologic characteristic is the presence of a mass of ghost cells embedded in the epithelium. We report two cases of a rare variant of a ghost cell odontogenic tumor associated with odontoma; to our knowledge, one is the youngest patient (four month old) reported in the English literature.

  5. Debris Likelihood, based on GhostNet, NASA Aqua MODIS, and GOES Imager, EXPERIMENTAL

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Debris Likelihood Index (Estimated) is calculated from GhostNet, NASA Aqua MODIS Chl a and NOAA GOES Imager SST data. THIS IS AN EXPERIMENTAL PRODUCT: intended...

  6. Ghost 10空间在搞什么“鬼”?

    Institute of Scientific and Technical Information of China (English)

    关灯不睡觉

    2006-01-01

    Ghost是大家非常熟悉的硬盘备份工具。Symantec在收购PowerQuest公司后.推出了采用PowerQuest公司旗下产品Drive Image核心技术的Ghost 9(2004年12月的《玩电脑》杂志曾做过关于Ghost9的测试)。可Ghost 9却是一个毁誉参半的产品。现在,Ghost 10又来了(http://www.symantec.com/index.htm)就让我们看看究竟新版本有哪些变化,是否值得升级?

  7. The Ghost in the Touchscreen: Social Scaffolds Promote Learning by Toddlers.

    Science.gov (United States)

    Zimmermann, Laura; Moser, Alecia; Lee, Herietta; Gerhardstein, Peter; Barr, Rachel

    2016-12-09

    This study examined the effect of a "ghost" demonstration on toddlers' imitation. In the ghost condition, virtual pieces moved to make a fish or boat puzzle. Fifty-two 2.5- and 3-year-olds were tested on a touchscreen (no transfer) or with 3D pieces (transfer); children tested with 3D pieces scored above a no demonstration baseline, but children tested on the touchscreen did not. Practice on the touchscreen (n = 23) by 2.5- and 3-year-olds prior to the ghost demonstration did not improve performance. Finally, children who learned the puzzle task via a social demonstration and were tested on the touchscreen (n = 26) performed better than the ghost conditions. Taken together, these studies demonstrate that social demonstrations enhance learning from novel touchscreen tools during early childhood.

  8. "Haunting experiences: Ghosts in contemporary folklore," by Diane E. Goldstein et al.

    Directory of Open Access Journals (Sweden)

    Linda Levitt

    2010-03-01

    Full Text Available Diane E. Goldstein, Sylvia Ann Grider, and Jeannie Banks Thomas. Haunting experiences: Ghosts in contemporary folklore. Logan: Utah State University Press, 2007, paperback, $24.95 (272p ISBN 978-0-87421-636-3.

  9. A spectre is haunting the cosmos: Quantum stability of massive gravity with ghosts

    CERN Document Server

    Könnig, Frank; Akrami, Yashar; Amendola, Luca; Zumalacárregui, Miguel

    2016-01-01

    Many theories of modified gravity with higher order derivatives are usually ignored because of serious problems that appear due to an additional ghost degree of freedom. Most dangerously, it causes an immediate decay of the vacuum. However, breaking Lorentz invariance can cure such abominable behavior. By analyzing a model that describes a massive graviton together with a remaining Boulware-Deser ghost mode we show that even ghostly theories of modified gravity can yield models that are viable at both classical and quantum levels and, therefore, they should not generally be ruled out. Furthermore, we identify the most dangerous quantum scattering process that has the main impact on the decay time and find differences to simple theories that only describe an ordinary scalar field and a ghost. Additionally, constraints on the parameters of the theory including some upper bounds on the Lorentz-breaking cutoff scale are presented. In particular, for a simple theory of massive gravity we find that a Lorentz violat...

  10. Cryptic female choice via sperm dumping favours male copulatory courtship in a spider.

    Science.gov (United States)

    Peretti, A V; Eberhard, W G

    2010-02-01

    Males of many animals perform 'copulatory courtship' during copulation, but the possible reproductive significance of this behaviour has seldom been investigated. In some animals, including the spider Physocyclus globosus (Pholcidae), the female discards sperm during or immediately following some copulations. In this study, we determined which of several variables associated with copulation correlated with paternity success in P. globosus when two males mate with a single female. Then, by determining which of these variables also correlated with sperm dumping, we inferred which variables may affect paternity via the mechanism of sperm dumping. Male abdomen vibration (a copulatory courtship behaviour) and male genitalic squeezing both correlated with both paternity and sperm dumping; so, these traits may be favoured by biased sperm dumping. Biased sperm dumping may also be the mechanism by which possible cryptic female choice favours another male trait that was the subject of a previous study, responsiveness to female stridulation.

  11. Assessment of impact on health of children working in the garbage dumping site in Dhaka, Bangladesh.

    Science.gov (United States)

    Lahiry, Gargy; Rahman, Tania; Hasan, A K M Mahbub; Dutta, Alak K; Arif, Md; Howlader, Zakir H

    2011-12-01

    Waste dumping is one of the major causes of environment pollution in Bangladesh. This study was designed to assess the impact on health of children working in one of the garbage dumping sites in Dhaka. Blood samples were collected from exposed (n = 20, aged: 8-15 years, exposed to dumped garbage from 6 months to 6 years) and control subjects (n = 15, age matched and never worked in the garbage dumping site). Oxidative stress markers like lipid hydroperoxides, thiobarbituric acid reactive substances and protein carbonyl content were measured. Alkaline comet assay was performed to assess the possible damage in DNA. To check the consequences of possible toxic exposure, we performed liver function tests of the study subjects. Oxidative stress-mediated damage of macromolecules was found to be significantly increased in the exposed children. Liver function tests were found normal. Thus, the children working in garbage dumping site are in severe health risk.

  12. Treatment with acarbose in severe hypoglycaemia due to late dumping syndrome.

    Science.gov (United States)

    Wang, Congcong; Pang, Shuguang; Jiang, Qiang; Duan, Guanglan; Sun, Yongmei; Li, Mei

    2013-12-01

    Dumping syndrome is a serious complication that may occur after gastric surgery in approximately 10% of patients in the 1990s. With the increasing number of patients undergoing bariatric surgery, the incidence of dumping syndrome is likely to increase in recent years. It is necessary for clinicians to recognize the syndrome and master its management. We present a case of recurrent loss of consciousness, which was finally accurately diagnosed as late dumping syndrome twelve years after subtotal gastrectomy and successfully treated with acarbose. A 66-year old lean male was found unconscious repeatedly within one year, oral glucose tolerance tests performed before and after acarbose treatment verified the diagnosis of late dumping syndrome. Hypoglycaemia can damage the body in acute and chronic form. Acarbose can be used as a successful treatment modality for reactive hypoglycaemia due to late dumping syndrome by influencing the release of hormone.

  13. Patient dumping, outlier payments, and optimal healthcare payment policy under asymmetric information.

    Science.gov (United States)

    Takahara, Tsuyoshi

    2016-12-01

    We analyze a rationale for official authorization of patient dumping in the prospective payment policy framework. We show that when the insurer designs the healthcare payment policy to let hospitals dump high-cost patients, there is a trade-off between the disutility of dumped patients (changes in hospitals' rent extraction due to low-severity patients) and the shift in the level of cost reduction efforts for high-severity patients. We also clarify the welfare-improving conditions by allowing hospitals to dump high-severity patients. Finally, we show that if the efficiency of the cost reduction efforts varies extensively and the healthcare payment cost is substantial, or if there are many private hospitals, the patient dumping policy can improve social welfare in a wider environment.

  14. Analysis of underground and surface waters of the dump of the solid communal waste

    Directory of Open Access Journals (Sweden)

    Almášová Kristína

    1997-06-01

    Full Text Available The paper deals with the contamination of underground and surface waters in the surroundings of the dump of the solid communal waste at the locality Cemjata in the East Slovakia,as well as with the development of the contamination in the surrounding of the dump depending on the time on the basis of the analysisof samples withdrawn from the net of drillholes in the observed area. In the area investigated there is described geological, geomorphological, climatic and hydrogeological situation, as well as the dump itself. The results acquired show that the contamination of the area brought about by medium size industrial and agricultural activity in the vicinity of the dump of the solid communal waste and inside the area investigated is comparable with the dangerous effects of the dump of the solid communal waste.

  15. Design of Air-Cooled Beam Dump for Extraction Line of PS Booster

    CERN Document Server

    Perillo-Marcone, A; Venturi, V; Antonakakis, T; Vlachoudis, V; Nowak, E; Mason, G; Battistin, M; Czapski, M; Sgobba, S

    2013-01-01

    A new beam dump has been designed, which withstands the future proton beam extracted from the Proton Syncrotron Booster (PSB) at CERN, consisting of up to 1E14 protons per pulse at 2 GeV after its upgrade in 2018/2019. In order to be able to efficiently release the deposited heat, the new dump will be made out of a single cylindrical block of a copper alloy and cooled by forced ventilation. In order to determine the energy density distribution deposited by the beam in the dump, Monte Carlo simulations were performed using FLUKA, and thermomechanical analyses carried out by importing the energy density into Ansys. In addition, CFD simulations of the airflow were carried out in order to accurately estimate the heat transfer convection coefficient on the surface of the dump. This paper describes the design process and highlights the constraints of integrating a new dump for increased beam power into the existing facility.

  16. Ghost analysis visualization techniques for complex systems: examples from the NIF Final Optics Assembly

    Energy Technology Data Exchange (ETDEWEB)

    Beer, G K; Hendrix, J L; Rowe, J; Schweyen, J

    1998-06-26

    The stray light or "ghost" analysis of the National Ignition Facility's (NIP) Final Optics Assembly (FOA) has proved to be one of the most complex ghost analyses ever attempted. The NIF FOA consists of a bundle of four beam lines that: 1) provides the vacuum seal to the target chamber, 2) converts 1ω to 3ω light, 3) focuses the light on the target, 4) separates a fraction of the 3ω beam for energy diagnostics, 5) separates the three wavelengths to diffract unwanted 1ω & 2ω light away from the target, 6) provides spatial beam smoothing, and 7) provides a debris barrier between the target chamber and the switchyard mirrors. The three wavelengths of light and seven optical elements with three diffractive optic surfaces generate three million ghosts through 4th order. Approximately 24,000 of these ghosts have peak fluence exceeding 1 J/cm2. The shear number of ghost paths requires a visualization method that allows overlapping ghosts on optics and mechanical components to be summed and then mapped to the optical and mechanical component surfaces in 3D space. This paper addresses the following aspects of the NIF Final Optics Ghost analysis: 1) materials issues for stray light mitigation, 2) limitations of current software tools (especially in modeling diffractive optics), 3) computer resource limitations affecting automated coherent raytracing, 4) folding the stray light analysis into the opto-mechanical design process, 5) analysis and visualization tools from simple hand calculations to specialized stray light analysis computer codes, and 6) attempts at visualizing these ghosts using a CAD model and another using a high end data visualization software approach.

  17. Spontaneous Breaking of Lorentz Symmetry by Ghost Condensation in Perturbative Quantum Gravity

    CERN Document Server

    Faizal, Mir

    2011-01-01

    In this paper we will study the spontaneous breakdown of the Lorentz symmetry by ghost condensation in perturbative quantum gravity. Our analysis will be done in the Curci-Ferrari gauge. We will also analyse modification of the BRST and the anti-BRST transformations by the formation of this ghost condensate. It will be shown that even though the modified BRST and the modified anti-BRST transformations are not nilpotent, their nilpotency is restored on-shell.

  18. Spontaneous breaking of Lorentz symmetry by ghost condensation in perturbative quantum gravity

    Science.gov (United States)

    Faizal, Mir

    2011-10-01

    In this paper, we will study the spontaneous breakdown of the Lorentz symmetry by ghost condensation in perturbative quantum gravity. Our analysis will be done in the Curci-Ferrari gauge. We will also analyse the modification of the BRST and anti-BRST transformations by the formation of this ghost condensate. It will be shown that even though the modified BRST and anti-BRST transformations are not nilpotent, their nilpotency is restored on-shell.

  19. Metastatic ghost cell odontogenic carcinoma: description of a case and search for actionable targets

    Directory of Open Access Journals (Sweden)

    Maximilien J. Rappaport

    2015-09-01

    Full Text Available Ghost cell odontogenic carcinoma (GCOC is an exceedingly rare malignant tumor on the spectrum of already uncommon odontogenic or dentinogenic tumors. We describe here the case of metastatic GCOC in a patient with a history of recurrent dentinogenic ghost cell tumor of the mandible, now presenting with bilateral pleural effusions. We will discuss typical histopathologic and histochemical features of GCOC, along with results of genomic testing and their role in directing therapy.

  20. The Indispensability of Ghost Fields in the Light-Cone Gauge Quantization of Gauge Fields

    OpenAIRE

    Nakawaki, Yuji; McCartor, Gary

    1999-01-01

    We continue McCartor and Robertson's recent demonstration of the indispensability of ghost fields in the light-cone gauge quantization of gauge fields. It is shown that the ghost fields are indispensable in deriving well-defined antiderivatives and in regularizing the most singular component of gauge field propagator. To this end it is sufficient to confine ourselves to noninteracting abelian fields. Furthermore to circumvent dealing with constrained systems, we construct the temporal gauge c...