Sample records for image details places

  1. Where do imaging clinical trials take place?

    Cancer.gov

    Imaging clinical trials take place in doctor's offices, cancer centers, other medical centers, community hospitals and clinics, and veterans' and military hospitals in cities and towns across the United States and in other countries. Imaging clinical

  2. Most Detailed Image of the Crab Nebula

    NASA Technical Reports Server (NTRS)

    2005-01-01

    This new Hubble image -- one among the largest ever produced with the Earth-orbiting observatory -- shows the most detailed view so far of the entire Crab Nebula ever made. The Crab is arguably the single most interesting object, as well as one of the most studied, in all of astronomy. The image is the largest image ever taken with Hubble's WFPC2 workhorse camera.

    The Crab Nebula is one of the most intricately structured and highly dynamical objects ever observed. The new Hubble image of the Crab was assembled from 24 individual exposures taken with the NASA/ESA Hubble Space Telescope and is the highest resolution image of the entire Crab Nebula ever made.

  3. HUBBLE CAPTURES DETAILED IMAGE OF URANUS' ATMOSPHERE

    NASA Technical Reports Server (NTRS)

    2002-01-01

    Hubble Space Telescope has peered deep into Uranus' atmosphere to see clear and hazy layers created by a mixture of gases. Using infrared filters, Hubble captured detailed features of three layers of Uranus' atmosphere. Hubble's images are different from the ones taken by the Voyager 2 spacecraft, which flew by Uranus 10 years ago. Those images - not taken in infrared light - showed a greenish-blue disk with very little detail. The infrared image allows astronomers to probe the structure of Uranus' atmosphere, which consists of mostly hydrogen with traces of methane. The red around the planet's edge represents a very thin haze at a high altitude. The haze is so thin that it can only be seen by looking at the edges of the disk, and is similar to looking at the edge of a soap bubble. The yellow near the bottom of Uranus is another hazy layer. The deepest layer, the blue near the top of Uranus, shows a clearer atmosphere. Image processing has been used to brighten the rings around Uranus so that astronomers can study their structure. In reality, the rings are as dark as black lava or charcoal. This false color picture was assembled from several exposures taken July 3, 1995 by the Wide Field Planetary Camera-2. CREDIT: Erich Karkoschka (University of Arizona Lunar and Planetary Lab) and NASA

  4. Hubble Captures Detailed Image of Uranus' Atmosphere

    NASA Technical Reports Server (NTRS)

    1996-01-01

    Hubble Space Telescope has peered deep into Uranus' atmosphere to see clear and hazy layers created by a mixture of gases. Using infrared filters, Hubble captured detailed features of three layers of Uranus' atmosphere.

    Hubble's images are different from the ones taken by the Voyager 2 spacecraft, which flew by Uranus 10 years ago. Those images - not taken in infrared light - showed a greenish-blue disk with very little detail.

    The infrared image allows astronomers to probe the structure of Uranus' atmosphere, which consists of mostly hydrogen with traces of methane. The red around the planet's edge represents a very thin haze at a high altitude. The haze is so thin that it can only be seen by looking at the edges of the disk, and is similar to looking at the edge of a soap bubble. The yellow near the bottom of Uranus is another hazy layer. The deepest layer, the blue near the top of Uranus, shows a clearer atmosphere.

    Image processing has been used to brighten the rings around Uranus so that astronomers can study their structure. In reality, the rings are as dark as black lava or charcoal.

    This false color picture was assembled from several exposures taken July 3, 1995 by the Wide Field Planetary Camera-2.

    The Wide Field/Planetary Camera 2 was developed by the Jet Propulsion Laboratory and managed by the Goddard Spaced Flight Center for NASA's Office of Space Science.

    This image and other images and data received from the Hubble Space Telescope are posted on the World Wide Web on the Space Telescope Science Institute home page at URL http://oposite.stsci.edu/pubinfo/

  5. Detailed Structural Decomposition of Galaxy Images

    E-print Network

    Chien Y. Peng; Luis C. Ho; Chris D. Impey; Hans-Walter Rix

    2002-04-10

    We present a two-dimensional (2-D) fitting algorithm (GALFIT) designed to extract structural components from galaxy images, with emphasis on closely modeling light profiles of spatially well-resolved, nearby galaxies observed with the Hubble Space Telescope. Our algorithm improves on previous techniques in two areas, by being able to simultaneously fit a galaxy with an arbitrary number of components, and with optimization in computation speed, suited for working on large galaxy images. We use 2-D models such as the ``Nuker'' law, the Sersic (de Vaucouleurs) profile, an exponential disk, and Gaussian or Moffat functions. The azimuthal shapes are generalized ellipses that can fit disky and boxy components. Many galaxies with complex isophotes, ellipticity changes, and position-angle twists can be modeled accurately in 2-D. When examined in detail, we find that even simple-looking galaxies generally require at least three components to be modeled accurately, rather than the one or two components more often employed. We illustrate this by way of 7 case studies, which include regular and barred spiral galaxies, highly disky lenticular galaxies, and elliptical galaxies displaying various levels of complexities. A useful extension of this algorithm is to accurately extract nuclear point sources in galaxies. We compare 2-D and 1-D extraction techniques on simulated images of galaxies having nuclear slopes with different degrees of cuspiness, and we then illustrate the application of the program to several examples of nearby galaxies with weak nuclei.

  6. Place-Identity in a School Setting: Effects of the Place Image

    ERIC Educational Resources Information Center

    Marcouyeux, Aurore; Fleury-Bahi, Ghozlane

    2011-01-01

    Studies on place identity show positive relationships between the evaluation of a place and mechanisms involved in place identification. However, individuals also identify with places of low social prestige (places that bear a negative social image). Few authors investigate the nature of place identity processes in this case. The goal of this…

  7. Spatial gamut mapping for preserving the details of an image

    NASA Astrophysics Data System (ADS)

    Song, In-Yong; Ha, Ho-Gun; Kyung, Wang-Jun; Ha, Yeong-Ho

    2012-01-01

    The spatial gamut-mapping algorithm (SGMA) overcomes the drawbacks of the widely used color-by-color methods. Spatial gamut mapping can preserve detailed information in original images by performing adaptive gamut mapping in surrounding pixels within the image. However, spatial gamut mapping can result in hue shift and the halo effect. In addition, it only preserves the boundary information outside the color gamut; the resulting gamut-mapped image does not sufficiently preserve the detailed information in the input image. In this paper, we propose an SGMA that utilizes details of the input image. Our approach improves detail that is not effectively represented with conventional spatial gamut mapping. This is done by taking an original image and first implementing gamut mapping of the input image. Then, the details of the input image and gamut-mapped image are extracted. By examining the out-of-gamut region, the details of the input image can be preserved when these values are added to the gamut-mapped image. The resulting image is obtained by clipping out-of-gamut pixels, since these pixels are generated in the process of preserving details. We demonstrated that images obtained using the proposed method are more similar to the input images, compared to images obtained using conventional methods.

  8. Al-26 imaging details from COMPTEL

    NASA Astrophysics Data System (ADS)

    Diehl, R.; Knodlseder, J.; Bennett, K.; Bloemen, H.; Dupraz, C.; Hermsen, W.; Lichti, G. G.; Morris, D.; Oberlack, U.; Ryan, J.

    1995-05-01

    The Compton Telescope (COMPTEL) map of 1.809 MeV emission from Galactic Al-26 is now based on 2 1/2 years of data. Different imaging analysis approaches are discussed: Likelihood maps from point source scans are utilized for searches of emission regions; astrophysical source models are fitted to the measurement with the maximum likelihood method; deconvolved images are produced with the maximum entropy algorithm. Simulations and statistical analysis with the bootstrap method demonstrate that the intensity irregularity and asymmetry along the Galactic plane is significant, although weaker individual features are insignificant by themselves. The comparison of classical Al-26 source tracer distributions shows that none of these models represents the COMPTEL data well. The measured 1.809 MeV feature from the Vela region, positionally consistent with the Vela supernova remnant, shows an indication for extended emission.

  9. Interacting with Image Sequences: Detail-in-Context and Thumbnails

    E-print Network

    Carpendale, Sheelagh

    to the presentation of image sequences on a desktop monitor, a variation of a detail-in-context technique. This paper, information visualization 1 Introduction Areas such as Magnetic Resonance Imaging (MRI), meteorology, or video and software. The use of desktop monitors, however, has an inherent disadvantage. The display area, in which

  10. Detailed images of asteroid 25143 Itokawa from Hayabusa.

    PubMed

    Saito, J; Miyamoto, H; Nakamura, R; Ishiguro, M; Michikami, T; Nakamura, A M; Demura, H; Sasaki, S; Hirata, N; Honda, C; Yamamoto, A; Yokota, Y; Fuse, T; Yoshida, F; Tholen, D J; Gaskell, R W; Hashimoto, T; Kubota, T; Higuchi, Y; Nakamura, T; Smith, P; Hiraoka, K; Honda, T; Kobayashi, S; Furuya, M; Matsumoto, N; Nemoto, E; Yukishita, A; Kitazato, K; Dermawan, B; Sogame, A; Terazono, J; Shinohara, C; Akiyama, H

    2006-06-01

    Rendezvous of the Japanese spacecraft Hayabusa with the near-Earth asteroid 25143 Itokawa took place during the interval September through November 2005. The onboard camera imaged the solid surface of this tiny asteroid (535 meters by 294 meters by 209 meters) with a spatial resolution of 70 centimeters per pixel, revealing diverse surface morphologies. Unlike previously explored asteroids, the surface of Itokawa reveals both rough and smooth terrains. Craters generally show unclear morphologies. Numerous boulders on Itokawa's surface suggest a rubble-pile structure. PMID:16741110

  11. New Images Show Unprecedented Detail of Neighbor Galaxy's Gas

    NASA Astrophysics Data System (ADS)

    2001-01-01

    Using radio telescopes in the United States and Europe, astronomers have made the most detailed images ever of Hydrogen gas in a spiral galaxy other than the Milky Way. The scientists used the National Science Foundation's Very Large Array (VLA) radio telescope in New Mexico and the Westerbork Synthesis Radio Telescope (WSRT) in the Netherlands to produce an image of the galaxy M33, known to amateur astronomers as the Pinwheel Galaxy. Doppler-Shift Image of M33's Gas "An image with the level of detail we have achieved opens the door to learning fundamental new facts about the relationship between massive stars and the galaxy's complicated gaseous environment. This, in turn, will help us better understand how galaxies age," said David Thilker, of the National Radio Astronomy Observatory (NRAO) in Socorro, NM. Thilker worked with Robert Braun of the Netherlands Foundation for Research in Astronomy and Rene Walterbos of New Mexico State University in Las Cruces. The scientists reported their findings today at the American Astronomical Society's meeting in San Diego, CA. The VLA and WSRT received radio waves at a wavelength of 21 centimeters that are naturally emitted by Hydrogen atoms. Using this data, the astronomers produced images showing the distribution of neutral atomic Hydrogen in M33. In addition, because the atoms emit at a very specific wavelength, the scientists could detect the galaxy's rotation by tuning the telescopes' radio receivers to receive radio waves whose length has been changed by Doppler shifting. The new images show details of the galaxy smaller than 130 light-years. "With more computer processing, we will be able to see features as small as 65 light-years," Thilker said. "This, we believe, will allow us to see 'bubbles' in the galaxy's gas that have been inflated as the result of one or more supernova explosions," Thilker added. At a distance from Earth of about 2.7 million light-years, M33 is a member of the Local Group of galaxies, which also includes our own Milky Way and the Andromeda Galaxy. With a diameter of about 60,000 light-years, it is roughly half the size of the Milky Way. Under vary dark skies, people with excellent vision can see M33 with the unaided eye. With common amateur telescopes, its spiral arms can be seen. The National Radio Astronomy Observatory is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc.

  12. Maia X-ray fluorescence imaging: Capturing detail in complex natural samples

    NASA Astrophysics Data System (ADS)

    Ryan, C. G.; Siddons, D. P.; Kirkham, R.; Li, Z. Y.; de Jonge, M. D.; Paterson, D. J.; Kuczewski, A.; Howard, D. L.; Dunn, P. A.; Falkenberg, G.; Boesenberg, U.; De Geronimo, G.; Fisher, L. A.; Halfpenny, A.; Lintern, M. J.; Lombi, E.; Dyl, K. A.; Jensen, M.; Moorhead, G. F.; Cleverley, J. S.; Hough, R. M.; Godel, B.; Barnes, S. J.; James, S. A.; Spiers, K. M.; Alfeld, M.; Wellenreuther, G.; Vukmanovic, Z.; Borg, S.

    2014-04-01

    Motivated by the challenge of capturing complex hierarchical chemical detail in natural material from a wide range of applications, the Maia detector array and integrated realtime processor have been developed to acquire X-ray fluorescence images using X-ray Fluorescence Microscopy (XFM). Maia has been deployed initially at the XFM beamline at the Australian Synchrotron and more recently, demonstrating improvements in energy resolution, at the P06 beamline at Petra III in Germany. Maia captures fine detail in element images beyond 100 M pixels. It combines a large solid-angle annular energy-dispersive 384 detector array, stage encoder and flux counter inputs and dedicated FPGA-based real-time event processor with embedded spectral deconvolution. This enables high definition imaging and enhanced trace element sensitivity to capture complex trace element textures and place them in a detailed spatial context. Maia hardware and software methods provide per pixel correction for dwell, beam flux variation, dead-time and pileup, as well as off-line parallel processing for enhanced throughput. Methods have been developed for real-time display of deconvoluted SXRF element images, depth mapping of rare particles and the acquisition of 3D datasets for fluorescence tomography and XANES imaging using a spectral deconvolution method that tracks beam energy variation.

  13. Combining Level-of-Details on Terrain Meshes and Texture Images for Landscape Visualization

    E-print Network

    Tsai, Fuan "Alfonso"

    Zhong-Da Rd., Zhong-Li, Taoyuan 320 Taiwan ftsai@csrsr.ncu.edu.tw Kuo-Hsing Hsiao Energy and Resources original high resolution digital elevation model and satellite image using quad-tree and image pyramid, the concept of image pyramid is used to generate images of multiple details. Which level of image to load

  14. Detailed Images from Europa Point to Slush Below Surface

    NSDL National Science Digital Library

    1998-01-01

    Nine Galileo images of the Jovian moon Europa taken in December of 1997 have recently been released by the National Aeronautics and Space Administration's Jet Propulsion Laboroatory. The images support the theory that slush or liquid water exists below the surface of the satellite. The site contains links to the images (available in several resolutions and formats) and descriptive captions, along with further discussion of the slush/liquid water theory.

  15. The image of place in American popular music, 1970-1990 

    E-print Network

    Seiler, Leslie Carl

    1997-01-01

    Popular music is examined from two geographical perspectives, the image of place as represented in the titles of popular songs and the changing geography of the popular music industry. Examining the trend in place reference in popular song titles...

  16. A Parameterization for Land-Atmosphere-Cloud Exchange (PLACE): Documentation and Testing of a Detailed Process Model of the Partly Cloudy Boundary Layer over Heterogeneous Land

    Microsoft Academic Search

    Peter J. Wetzel; Aaron Boone

    1995-01-01

    This paper presents a general description of, and demonstrates the capabilities of, the Parameterization for Land-Atmosphere-Cloud Exchange (PLACE). The PLACE model is a detailed process model of the partly cloudy atmospheric boundary layer and underlying heterogeneous land surfaces. In its development, particular attention has been given to three of the model's subprocesses: the prediction of boundary layer cloud amount, the

  17. A Picture's Worth a Thousand Words: From Image to Detailed Narrative.

    ERIC Educational Resources Information Center

    Gardner, Traci

    This lesson uses artworks as inspiration for narrative writing: students in grades 6-8 will have the chance to think critically about their interpretations of the events in an image and to write a story that tells background on the image or extends details on what has happened. During two 50-minute lessons, students will: demonstrate knowledge of…

  18. Shift Variance In Digital Radiographic Imaging Systems As A Source Of Error In Contrast Detail Measurements

    NASA Astrophysics Data System (ADS)

    Bencomo, Jose A.; Marsh, Lee M.; Morgan, Tommie J.; Cole, Arthur; Willis, Charles E.

    1985-06-01

    The effects of the total inherent digital imaging system shift variance on the perception of image details were investigated. These effects are particularly important in clinical digital imaging systems when the sampling aperture is comparable to or greater than the resolution dimensions (width of the point spread function) of the input images. The total system shift variance of a commercial digital imaging system, System One, DigiRad, Inc. (Palo Alto, CA), was quantified using a multiple high contrast bar pattern image. The square wave response functions (SWRF) of several nominally randomly selected locations on the displayed images were obtained and linearized by the logit transformation. The Coltman equation was then used to calculate the corresponding modulation transfer functions. Contrast detail (CD) diagrams were obtained using images of Burger-Rose phantoms for different relative positions of the input images with respect to the sampling pixel matrix. The effects of the shift variance on the CD diagrams were found to depend not only on the relative location of the image with respect to the pixel matrix but also on the input image quality. Further studies need to be performed to assess the clinical importance of the inherent shift variance on clinical digital imaging systems.

  19. Research of detecting details and features of infrared polarization imaging experiment

    NASA Astrophysics Data System (ADS)

    Yang, Fan; Liu, Xiao-cheng; Wang, Ji-zhong

    2013-09-01

    Along with modern infrared camouflage technique developed, it is hard to distinguish target and background by using traditional infrared intensity imaging in general because infrared feature of target and background are tending to consistent. To address this issue, a thought that utilizes infrared polarization imaging technique to detect target is proposed in this paper based on analyzing of the principle of infrared polarization imaging. The experiments are carried out for detecting of infrared low-contrast target imaging. Comparing with the infrared intensity images, the average gradient of the infrared polarization image has been improved 155% and the contrast of target and background has been improved 120% in infrared polarization images. The effective experimental data and imaging law between infrared polarization images and infrared intensity images are obtained that, the technology of infrared polarization imaging can detect details of infrared target more clearly than the infrared intensity imaging, and it can obviously increase the contrast between target and background. Therefore, it is more helpful to detecting details and features of target.

  20. Detection of Toxocara eggs in contaminated soil from various public places of Chennai city and detailed correlation with literature.

    PubMed

    Thomas, Divyamol; Jeyathilakan, N

    2014-06-01

    Toxocarosis is one of the most prevalent human helminthosis caused by larvae of Toxocara canis and Toxocara cati, the most widely distributed nematode parasites of dogs and cats respectively. Soil is considered as the principal source of transmission of Toxocara infection to human beings. With increasing population of dogs and cats, soil contamination with ova or eggs of Toxocara can be detected in public and private locations of city backyards, playgrounds, streets, sand pits and so on, regardless of the season of the year. In this context the present study was carried out to estimate the extent of soil contamination with Toxocara eggs in public parks, playgrounds and few kennels situated in different parts of Chennai city. A total of 105 soil samples from 40 public places and 5 kennels were screened for the presence of parasitic eggs. Toxocara eggs were recovered from 5 soil samples indicating an overall prevalence rate of 4.75 %. Out of 80 samples collected from public places, three samples, one each from Mogappair, My lady park (Periamet) and Madras Veterinary College showed the presence of Toxocara spp. eggs indicating an overall prevalence of 3.75 per cent. Out of the 25 samples from 5 kennels, two samples one each from Tambaram and Thorappakkam kennels were positive for Toxocara eggs with prevalence of 8 per cent. Low prevalence of Toxocara eggs in soil samples of these areas can be attributed to the less population of pups, the carriers of adult worms and the active source of soil contamination. The progress made in ABC (animal birth control) programme carried out by both governmental and non-governmental organizations has contributed to reduction of birth rate in dogs and thereby reduced the chances of soil contamination with Toxocara eggs to a certain extent in Chennai city. PMID:24808647

  1. A New Class of Detail-Preserving Filters for Image Processing

    Microsoft Academic Search

    Ari Nieminen; Pekka Heinonen; Yrjö Neuvo

    1987-01-01

    A new class of median type filters for image processing is proposed. In the filters, linear FIR substructures are used in conjunction with the median operation. The root signals and noise attenuation properties of the FIR-median hybrid filters are analyzed and compared to representative edge preserving filtering operations. The concept of multilevel median operation is introduced to improve the detail

  2. Detailed analysis of latencies in image-based dynamic MLC tracking

    SciTech Connect

    Poulsen, Per Rugaard; Cho, Byungchul; Sawant, Amit; Ruan, Dan; Keall, Paul J. [Department of Radiation Oncology, Stanford University, Stanford, California 94305 and Department of Oncology and Department of Medical Physics, Aarhus University Hospital, 8000 Aarhus (Denmark); Department of Radiation Oncology, Stanford University, Stanford, California 94305 and Department of Radiation Oncology, Asan Medical Center, Seoul 138-736 (Korea, Republic of); Department of Radiation Oncology, Stanford University, Stanford, California 94305 (United States)

    2010-09-15

    Purpose: Previous measurements of the accuracy of image-based real-time dynamic multileaf collimator (DMLC) tracking show that the major contributor to errors is latency, i.e., the delay between target motion and MLC response. Therefore the purpose of this work was to develop a method for detailed analysis of latency contributions during image-based DMLC tracking. Methods: A prototype DMLC tracking system integrated with a linear accelerator was used for tracking a phantom with an embedded fiducial marker during treatment delivery. The phantom performed a sinusoidal motion. Real-time target localization was based on x-ray images acquired either with a portal imager or a kV imager mounted orthogonal to the treatment beam. Each image was stored in a file on the imaging workstation. A marker segmentation program opened the image file, determined the marker position in the image, and transferred it to the DMLC tracking program. This program estimated the three-dimensional target position by a single-imager method and adjusted the MLC aperture to the target position. Imaging intervals {Delta}T{sub image} from 150 to 1000 ms were investigated for both kV and MV imaging. After the experiments, the recorded images were synchronized with MLC log files generated by the MLC controller and tracking log files generated by the tracking program. This synchronization allowed temporal analysis of the information flow for each individual image from acquisition to completed MLC adjustment. The synchronization also allowed investigation of the MLC adjustment dynamics on a considerably finer time scale than the 50 ms time resolution of the MLC log files. Results: For {Delta}T{sub image}=150 ms, the total time from image acquisition to completed MLC adjustment was 380{+-}9 ms for MV and 420{+-}12 ms for kV images. The main part of this time was from image acquisition to completed image file writing (272 ms for MV and 309 ms for kV). Image file opening (38 ms), marker segmentation (4 ms), MLC position calculation (16 ms), and MLC adjustment (52 ms) were considerably faster. For {Delta}T{sub image}=1000 ms, the total time from image acquisition to completed MLC adjustment increased to 1030{+-}62 ms (MV) and 1330{+-}52 ms (kV) mainly because of delayed image file writing. The MLC adjustment duration was constant 52 ms ({+-}3 ms) for MLC adjustments below 1.1 mm and increased linearly for larger MLC adjustments. Conclusions: A method for detailed time analysis of each individual real-time position signal for DMLC tracking has been developed and applied to image-based tracking. The method allows identification of the major contributors to latency and therefore a focus for reducing this latency. The method could be an important tool for the reconstruction of the delivered target dose during DMLC tracking as it provides synchronization between target motion and MLC motion.

  3. MIDA: A Multimodal Imaging-Based Detailed Anatomical Model of the Human Head and Neck

    PubMed Central

    Iacono, Maria Ida; Neufeld, Esra; Akinnagbe, Esther; Bower, Kelsey; Wolf, Johanna; Vogiatzis Oikonomidis, Ioannis; Sharma, Deepika; Lloyd, Bryn; Wilm, Bertram J.; Wyss, Michael; Pruessmann, Klaas P.; Jakab, Andras; Makris, Nikos; Cohen, Ethan D.; Kuster, Niels; Kainz, Wolfgang; Angelone, Leonardo M.

    2015-01-01

    Computational modeling and simulations are increasingly being used to complement experimental testing for analysis of safety and efficacy of medical devices. Multiple voxel- and surface-based whole- and partial-body models have been proposed in the literature, typically with spatial resolution in the range of 1–2 mm and with 10–50 different tissue types resolved. We have developed a multimodal imaging-based detailed anatomical model of the human head and neck, named “MIDA”. The model was obtained by integrating three different magnetic resonance imaging (MRI) modalities, the parameters of which were tailored to enhance the signals of specific tissues: i) structural T1- and T2-weighted MRIs; a specific heavily T2-weighted MRI slab with high nerve contrast optimized to enhance the structures of the ear and eye; ii) magnetic resonance angiography (MRA) data to image the vasculature, and iii) diffusion tensor imaging (DTI) to obtain information on anisotropy and fiber orientation. The unique multimodal high-resolution approach allowed resolving 153 structures, including several distinct muscles, bones and skull layers, arteries and veins, nerves, as well as salivary glands. The model offers also a detailed characterization of eyes, ears, and deep brain structures. A special automatic atlas-based segmentation procedure was adopted to include a detailed map of the nuclei of the thalamus and midbrain into the head model. The suitability of the model to simulations involving different numerical methods, discretization approaches, as well as DTI-based tensorial electrical conductivity, was examined in a case-study, in which the electric field was generated by transcranial alternating current stimulation. The voxel- and the surface-based versions of the models are freely available to the scientific community. PMID:25901747

  4. A novel material detection algorithm based on 2D GMM-based power density function and image detail addition scheme in dual energy X-ray images.

    PubMed

    Pourghassem, Hossein

    2012-01-01

    Material detection is a vital need in dual energy X-ray luggage inspection systems at security of airport and strategic places. In this paper, a novel material detection algorithm based on statistical trainable models using 2-Dimensional power density function (PDF) of three material categories in dual energy X-ray images is proposed. In this algorithm, the PDF of each material category as a statistical model is estimated from transmission measurement values of low and high energy X-ray images by Gaussian Mixture Models (GMM). Material label of each pixel of object is determined based on dependency probability of its transmission measurement values in the low and high energy to PDF of three material categories (metallic, organic and mixed materials). The performance of material detection algorithm is improved by a maximum voting scheme in a neighborhood of image as a post-processing stage. Using two background removing and denoising stages, high and low energy X-ray images are enhanced as a pre-processing procedure. For improving the discrimination capability of the proposed material detection algorithm, the details of the low and high energy X-ray images are added to constructed color image which includes three colors (orange, blue and green) for representing the organic, metallic and mixed materials. The proposed algorithm is evaluated on real images that had been captured from a commercial dual energy X-ray luggage inspection system. The obtained results show that the proposed algorithm is effective and operative in detection of the metallic, organic and mixed materials with acceptable accuracy. PMID:22635176

  5. Noise removal and real-time detail enhancement of high-dynamic-range infrared images with time consistency

    NASA Astrophysics Data System (ADS)

    Garcia, Frederic; Schockaert, Cedric; Mirbach, Bruno

    2015-04-01

    This paper presents a noise removal and image detail enhancement method that accounts for the limitations on human's perception to effectively visualize high-dynamic-range (HDR) infrared (IR) images. In order to represent real world scenes, IR images use to be represented by a HDR that generally exceeds the working range of common display devices (8 bits). Therefore, an effective HDR mapping without losing the perceptibility of details is needed. To do so, we introduce the use of two guided filters (GF) to generate an accurate base and detail image component. A plausibility mask is also generated from the combination of the linear coefficients that result from each GF; an indicator of the spatial detail that enables to identify those regions that are prominent to present noise in the detail image component. Finally, we filter the working range of the HDR along time to avoid global brightness fluctuations in the final 8 bit data representation, which results from combining both detail and base image components using a local adaptive gamma correction (LAGC). The last has been designed according to the human vision characteristics. The experimental evaluation shows that the proposed approach significantly enhances image details in addition to improving the contrast of the entire image. Finally, the high performance of the proposed approach makes it suitable for real word applications.

  6. Simultaneous cellular-resolution optical perturbation and imaging of place cell firing fields

    PubMed Central

    Rickgauer, John Peter; Deisseroth, Karl; Tank, David W.

    2015-01-01

    Linking neural microcircuit function to emergent properties of the mammalian brain requires fine-scale manipulation and measurement of neural activity during behavior, where each neuron’s coding and dynamics can be characterized. We developed an optical method for simultaneous cellular-resolution stimulation and large-scale recording of neuronal activity in behaving mice. Dual-wavelength two-photon excitation allowed largely independent functional imaging with a green fluorescent calcium sensor (GCaMP3, ? = 920 ± 6 nm) and single-neuron photostimulation with a red-shifted optogenetic probe (C1V1, ? = 1,064 ± 6 nm) in neurons coexpressing the two proteins. We manipulated task-modulated activity in individual hippocampal CA1 place cells during spatial navigation in a virtual reality environment, mimicking natural place-field activity, or ‘biasing’, to reveal subthreshold dynamics. Notably, manipulating single place-cell activity also affected activity in small groups of other place cells that were active around the same time in the task, suggesting a functional role for local place cell interactions in shaping firing fields. PMID:25402854

  7. Functional imaging of hippocampal place cells at cellular resolution during virtual navigation

    PubMed Central

    Dombeck, Daniel A.; Harvey, Christopher D.; Tian, Lin; Looger, Loren L.; Tank, David W.

    2010-01-01

    Spatial navigation is a widely employed behavior in rodent studies of neuronal circuits underlying cognition, learning and memory. In vivo microscopy combined with genetically-encoded indicators provides important new tools to study neuronal circuits, but has been technically difficult to apply during navigation. We describe methods to image the activity of hippocampal CA1 neurons with sub-cellular resolution in behaving mice. Neurons expressing the genetically encoded calcium indicator GCaMP3 were imaged through a chronic hippocampal window. Head-fixed mice performed spatial behaviors within a setup combining a virtual reality system and a custom built two-photon microscope. Populations of place cells were optically identified, and the correlation between the location of their place fields in the virtual environment and their anatomical location in the local circuit was measured. The combination of virtual reality and high-resolution functional imaging should allow for a new generation of studies to probe neuronal circuit dynamics during behavior. PMID:20890294

  8. Real-time polarization difference imaging (rPDI) reveals surface details and textures in harsh environments

    NASA Astrophysics Data System (ADS)

    Brousseau, Denis; Plant, Jim; Thibault, Simon

    2013-05-01

    Extensive peer reviewed scientific research has demonstrated the utility of polarization difference imaging (PDI) to reveal subtle surface details and textures in poor lighting conditions caused by fog, smoke, clouds or turbid water. We present sample results of a new real time PDI camera showing the ability of the camera to enhanced imaging harsh environments, particularly in turbid water.

  9. Multiparameter double hole contrast detail phantom: Ability to detect image displacement due to off position anode stem

    NASA Astrophysics Data System (ADS)

    Pauzi, Nur Farahana; Majid, Zafri Azran Abdul; Sapuan, Abdul Halim; Azemin, Mohd Zulfaezal Che; Junet, Laila Kalidah

    2015-04-01

    Contrast Detail phantom is a quality control tool to analyze the performance of imaging devices. Currently, its function is solely to evaluate the contrast detail characteristic of imaging system. It consists of drilled hole which gives effect to the penetration of x-ray beam divergence to pass through the base of each hole. This effect will lead to false appearance of image from its original location but it does not being visualized in the radiograph. In this study, a new design of Contrast Detail phantom's hole which consists of double hole construction has been developed. It can detect the image displacement which is due to off position of anode stem from its original location. The double hole differs from previous milled hole, whereby it consists of combination of different hole diameters. Small hole diameter (3 mm) is positioned on top of larger hole diameter (10 mm). The thickness of double hole acrylic blocks is 13 mm. Result revealed` that, Multiparameter Double Hole Contrast Detail phantom can visualize the shifted flaw image quality produced by x-ray machine due to improper position of the anode stem which is attached to rotor and stator. The effective focal spot of x-ray beam also has been shifted from the center of collimator as a result of off-position anode stem. As a conclusion, the new design of double hole Contrast Detail phantom able to measure those parameters in a well manner.

  10. Integration of Point Clouds Originated from Laser Scaner and Photogrammetric Images for Visualization of Complex Details of Historical Buildings

    NASA Astrophysics Data System (ADS)

    Altuntas, C.

    2015-02-01

    Three-dimensional (3D) models of historical buildings are created for documentation and virtual realization of them. Laser scanning and photogrammetry are extensively used to perform for these aims. The selection of the method that will be used in threedimensional modelling study depends on the scale and shape of the object, and also applicability of the method. Laser scanners are high cost instruments. However, the cameras are low cost instruments. The off-the-shelf cameras are used for taking the photogrammetric images. The camera is imaging the object details by carrying on hand while the laser scanner makes ground based measurement. Laser scanner collect high density spatial data in a short time from the measurement area. On the other hand, image based 3D (IB3D) measurement uses images to create 3D point cloud data. The image matching and the creation of the point cloud can be done automatically. Historical buildings include more complex details. Thus, all details cannot be measured by terrestrial laser scanner (TLS) due to the blocking the details with each others. Especially, the artefacts which have complex shapes cannot be measured in full details. They cause occlusion on the point cloud model. However it is possible to record photogrammetric images and creation IB3D point cloud for these areas. Thus the occlusion free 3D model is created by the integration of point clouds originated from the TLS and photogrammetric images. In this study, usability of laser scanning in conjunction with image based modelling for creation occlusion free three-dimensional point cloud model of historical building was evaluated. The IB3D point cloud was created in the areas that could not been measured by TLS. Then laser scanning and IB3D point clouds were integrated in the common coordinate system. The registration point clouds were performed with the iterative closest point (ICP) and georeferencing methods. Accuracy of the registration was evaluated by convergency and its standard deviations for the ICP and residuals on the control points for the georeferencing method.

  11. Large-scale aerial images capture details of invasive plant populations

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Satellite and aerial remote sensing have been successfully used to measure invasive weed infestations over very large areas, but have limited resolution. Ground-based methods have provided detailed measurements of invasive weeds, but can measure only limited areas. Here we test a novel approach th...

  12. Large-scale Aerial Images Capture Details of Invasive Plant Populations

    Microsoft Academic Search

    Dana Blumenthal; D. Terrence Booth; Samuel E. Cox; Cara E. Ferrier

    2007-01-01

    Satellite and high-altitude aerial remote sensing have been used to measure dense infestations of invasive weeds over very large areas but have limited resolution and cannot be used to detect sparsely distributed weeds. Ground-based methods have provided detailed measurements of invasive weeds but can measure only limited areas. Here we test a novel approach that uses a lightweight airplane, flying

  13. Detailed Study of Defects in Silicon Solar Cells by Cathodoluminescence Spectrum Imaging: Preprint

    SciTech Connect

    Romero, M. J.; Ostapenko, S.; Al-Jassim, M. M.; Tarasov, I.; Sheldon, P.

    2003-08-01

    We have recently developed a spectrum imaging system for cathodoluminescence (CLsi) at NREL, which has been successfully applied to different semiconductors. The advanced multi-channel detection required for CLsi consists of an ultrafast spectrum acquisition triggered by the electron beam during scanning. Spectra are acquired either with a Roper Scientific silicon EEV-1340400 cryogenic CCD or an InGaAs 5121 cryogenic PDA, depending on the range of spectral emission. Acquisition times by pixel are typically of 10 to 20 ms (180 seconds for a 100100 pixel image). The output of spectrum imaging measurements is thus represented by a series of emission spectra. CCDIMAG, the software developed for CLsi, processes this spectrum series to reconstruct monochromatic images or extract the spectrum from any area on the image. This system is operated on the JEOL-5800 scanning electron microscope (SEM). CLsi measurements can be performed at temperatures between 15 K and 300 K. A low-vibration ARS Displex DE-202 closed-circuit cryostat provides cryogenic operation. The interface for vibration isolation has been developed to be compatible with SEM observation.

  14. Synthetic aperture radar image segmentation by a detail preserving Markov random field approach

    Microsoft Academic Search

    Paul C. Smits; Silvana G. Dellepiane

    1997-01-01

    A multichannel image segmentation method is imposed that utilizes Markov random fields (MRFs) with adaptive neighborhood (AN) systems. Bayesian inference is applied to realize the combination of evidence from different knowledge sources. In such a way, optimization of the shape of a neighborhood system is achieved by following a criterion that makes use of the Markovian property exploiting the local

  15. Figure 2: Object representation: simplified polygonal meshes with texture images that store fine geometric detail.

    E-print Network

    Whitton, Mary C.

    GPU-basedPenetrationDepthComputation forHapticTextureRendering Highlights First 6-DoF haptic texture rendering algorithm Objects are described as simplified polygonal representations with texture images haptic cues, but previous 6-DoF haptic rendering methods could not capture texture effects, due

  16. Advanced scale-space invariant, low detailed feature recognition from images - car brand recognition

    Microsoft Academic Search

    Stefan Badura; Stanislav Foltán

    2010-01-01

    This paper presents analysis of a model for car brand recognition. The used method is an invariant keypoint detector - descriptor. An input for the method is a set of images obtained from the real environment. The task of car classification according its brand is not a trivial task. Our work would be a part of an intelligent traffic system

  17. IMAGEability of place : experimental form and public space in an exploratorium for art and interactive telecommunications

    E-print Network

    Sung, Lillian T. (Lillian Thailian)

    1994-01-01

    In the advent of the intelligent age, the focal point of communal activity becomes the civic forum of information exchange. The interface of art, information and communication to the civic arena anticipates a public place ...

  18. "A Nice Place to Visit, But:" Television's Image of the City.

    ERIC Educational Resources Information Center

    Harris, William W.

    1976-01-01

    Urban planners and policy makers are concerned that the image of cities conveyed to metropolitan viewers over television is predominantly negative. Locational and investment decisions may be influenced by the level of confidence inspired by such images. Television viewers perceive that their chance of experiencing violence in the city is higher…

  19. Buck family pedigree (detail), still imageSite: DNA Interactive (www.dnai.org)

    NSDL National Science Digital Library

    2008-10-06

    DNAi location: Chronicle>Trial of Carrie Buck>trialDetail of Harry Laughlin's pedigree of the Buck famiiy. Although it was a bona fide medical diagnosis in its day, "feeblemindedness" had virtually no clinical meaning and is no longer used in medical terminology. Many people who were classified as feebleminded would now be called mildly retarded, learning disabled, or simply underachievers. Contrary to the evidence presented at her trial, Carrie appears to have had no serious mental problem, and she was not promiscuous. Vivian's conception was the result of Carrie's rape by Clarence Garland, the nephew of her foster parents. Carrie, like many unwed mothers of that time, was institutionalized to prevent shame to the family.

  20. Final Results from Mexnext-I: Analysis of detailed aerodynamic measurements on a 4.5 m diameter rotor placed in the large German Dutch Wind Tunnel DNW

    NASA Astrophysics Data System (ADS)

    Schepers, J. G.; Boorsma, K.; Munduate, X.

    2014-12-01

    The paper presents the final results from the first phase of IEA Task 29 'Mexnext'. Mexnext was a joint project in which 20 parties from 11 different countries cooperated. The main aim of Mexnext was to analyse the wind tunnel measurements which have been taken in the EU project 'MEXICO'. In the MEXICO project 10 institutes from 6 countries cooperated in doing experiments on an instrumented, 3 bladed wind turbine of 4.5 m diameter placed in the 9.5 by 9.5 m2 open section of the Large Low-speed Facility (LLF) of DNW in the Netherlands. Pressure distributions on the blades were obtained from 148 Kulite pressure sensors, distributed over 5 sections at 25, 35, 60, 82 and 92 % radial position respectively. Blade loads were monitored through two strain-gauge bridges at each blade root. Most interesting however are the extensive PIV flow field measurements, which have been taken simultaneously with the pressure and load measurements. As a result of the international collaboration within this task a very thorough analysis of the data could be carried out and a large number of codes were validated not only in terms of loads but also in terms of underlying flow field. The paper will present several results from Mexnext-I, i.e. validation results and conclusion on modelling deficiencies and directions for model improvement. The future plans of the Mexnext consortium are also briefly discussed. Amongst these are Mexnext-II, a project in which also aerodynamic measurements other than MEXICO are included, and 'New MEXICO' in which additional measurement on the MEXICO model are performed.

  1. Detailed interrogation of trypanosome cell biology via differential organelle staining and automated image analysis

    PubMed Central

    2012-01-01

    Background Many trypanosomatid protozoa are important human or animal pathogens. The well defined morphology and precisely choreographed division of trypanosomatid cells makes morphological analysis a powerful tool for analyzing the effect of mutations, chemical insults and changes between lifecycle stages. High-throughput image analysis of micrographs has the potential to accelerate collection of quantitative morphological data. Trypanosomatid cells have two large DNA-containing organelles, the kinetoplast (mitochondrial DNA) and nucleus, which provide useful markers for morphometric analysis; however they need to be accurately identified and often lie in close proximity. This presents a technical challenge. Accurate identification and quantitation of the DNA content of these organelles is a central requirement of any automated analysis method. Results We have developed a technique based on double staining of the DNA with a minor groove binding (4'', 6-diamidino-2-phenylindole (DAPI)) and a base pair intercalating (propidium iodide (PI) or SYBR green) fluorescent stain and color deconvolution. This allows the identification of kinetoplast and nuclear DNA in the micrograph based on whether the organelle has DNA with a more A-T or G-C rich composition. Following unambiguous identification of the kinetoplasts and nuclei the resulting images are amenable to quantitative automated analysis of kinetoplast and nucleus number and DNA content. On this foundation we have developed a demonstrative analysis tool capable of measuring kinetoplast and nucleus DNA content, size and position and cell body shape, length and width automatically. Conclusions Our approach to DNA staining and automated quantitative analysis of trypanosomatid morphology accelerated analysis of trypanosomatid protozoa. We have validated this approach using Leishmania mexicana, Crithidia fasciculata and wild-type and mutant Trypanosoma brucei. Automated analysis of T. brucei morphology was of comparable quality to manual analysis while being faster and less susceptible to experimentalist bias. The complete data set from each cell and all analysis parameters used can be recorded ensuring repeatability and allowing complete data archiving and reanalysis. PMID:22214525

  2. Mystic Places

    NSDL National Science Digital Library

    This Website from The Discovery Channel of Canada explores "some of the world's most enigmatic places." It features separate sections on three famous sites -- Easter Island, Nazca Lines, and Stonehenge -- discussing the construction, cultural significance, and physical history of the extraordinary structures erected at each. The site also offers a slideshow presenting dozens of dramatic photographs from the three places as well as links to pertinent news releases and features archived on the Discovery site. The discussions and images provided are extensive and can serve as a stand-alone source of information, suitable for individual or secondary education.

  3. Center for Imaging Science Job Opportunities www.cis.rit.edu/jobs The CIS office does not have any more details on the external postings listed here.

    E-print Network

    Zanibbi, Richard

    more details on the external postings listed here. Job Title: Image Mastering Engineer Job ID: 10400-renowned technical, creative and production capabilities in the art of computer animation. Creator of some

  4. A detailed three-step protocol for live imaging of intracellular traffic in polarized primary porcine RPE monolayers

    PubMed Central

    Toops, Kimberly A.; Tan, Li Xuan; Lakkaraju, Aparna

    2014-01-01

    The retinal pigment epithelium (RPE) performs numerous functions that are indispensable for photoreceptor health and vision. This monolayer of cells is also a major site of insult in inherited and age-related macular degenerations. In vitro models of primary RPE such as human fetal and adult RPE cultures have been invaluable for dissecting disease pathways at the cellular and molecular level. However, numerous studies show that it takes over four weeks for human RPE cell monolayers to become fully polarized after plating on semipermeable membrane supports. Poor persistence of transgene expression over this time period critically limits the applicability of human RPE cultures for live imaging studies required to follow dynamic processes like intracellular trafficking and organelle transport that occur over timescales of milliseconds. Here, we provide a detailed three-step protocol for live imaging of polarized primary RPE using high-speed spinning disk confocal microscopy. Step 1: establish porcine RPE monolayers that undergo differentiation within one week after plating on semipermeable membrane supports; step 2: transfect or transduce RPE using either of two different protocols that result in prolonged transgene expression; and step 3: perform multicolor high-speed live imaging of organelle transport in polarized RPE monolayers. Porcine RPE cells and photoreceptor outer segments were isolated from freshly harvested eyes and plated on collagen-coated Transwell® filters to generate polarized monolayers. After seven days, RPE monolayers were highly pigmented, had TER values ? 200 ?.cm2 and cleared outer segments within 5 hours after phagocytosis. These cells expressed RPE65, localized ZO-1 to the tight junction, Na+,K+-ATPase to the apical membrane and acetylated tubulin to the primary cilium. There was an inverse relationship between initial plating density and the time to differentiation. We used nucleofection to express fluorescently tagged genes in RPE cells prior to plating on filters or baculovirus fusion constructs to transfect polarized monolayers. Both these methods resulted in transfection efficiencies over 40% and transgene expression lasted up to 8 days after plating. These filters were imaged by high-speed spinning disk microscopy to follow tubulovesicular trafficking of lysosomes and actin dynamics in the RPE. Four-dimensional image analysis performed using commercially available software was used to analyze live imaging data. In conclusion, this 3-step protocol describes a powerful method to investigate organelle trafficking and function in real time in the RPE that can be used for answering fundamental questions of RPE cell biology and pathobiology. PMID:24861273

  5. Detailed structural image around splay-fault branching in the Nankai subduction seismogenic zone: Results from a high-density ocean bottom seismic survey

    Microsoft Academic Search

    Ayako Nakanishi; Shuichi Kodaira; Seiichi Miura; Aki Ito; Takeshi Sato; Jin-Oh Park; Yukari Kido; Yoshiyuki Kaneda

    2008-01-01

    To investigate megathrust earthquake and tsunami generation in a subduction seismogenic zone, it is important to know the detailed structure around the plate boundary and active splay-fault system. The Nankai Trough, southwestern Japan, is among the best studied subduction zones with splay faults in the world. This paper presents a detailed structural image around the splay fault in the coseismic

  6. The Google guys teamed up with NASA researchers (and several other consortiums) to create one of the most detailed online scientific map and image archives ever made of

    E-print Network

    Smith-Konter, Bridget

    1 The Google guys teamed up with NASA researchers (and several other consortiums) to create one of the most detailed online scientific map and image archives ever made of Mars ­ Google Mars. For this lab, you will explore the data and images available on Google Mars, both in 2-D and in 3-D. The 2-D version

  7. Detailed Decomposition of Galaxy Images II: Fitting Spiral Arms, Bars, and Non-axisymmetric Structures in GALFIT 3.0

    NASA Astrophysics Data System (ADS)

    Peng, Chien Y.; Ho, L. C.; Impey, C. D.; Rix, H. W.

    2007-12-01

    The technique of fitting galaxy light profiles with analytic functions (e.g. de Vaucouleurs, exponential), also known as parametric fitting, has been a useful tool for studying galaxy structure and evolution. It is often used to quantify global properties of galaxies such as luminosity, size, ellipticity, and profile shape in a self-consistent manner. It also allows one to deblend multiple components of a galaxy, e.g. bulge/disk/bar/AGN, or to separate overlapping galaxies in a rigorous and robust way. However, the traditional method of fitting galaxies relies on using ellipsoid models, which is sometimes criticized to argue in favor of non-parametric techniques. In this study, we show that two dimensional image fitting is not fundamentally restricted to using axisymmetric ellipsoid shapes. By breaking from axisymmetry parametrically through the use of Fourier modes, one can better quantify the degree of galaxy irregularity in an intuitive and well-motivated manner. We also introduce a technique that allows one to fit spiral structures in late-type galaxies through the use of coordinate rotation. By comparing with more realistic models now possible, we find that the traditional use of simple ellipsoid models is robust even on irregular and spiral galaxies, because single component fits are by nature large scale averages. However, when it comes to quantifying sub-components of a galaxy, sometimes it is necessary to model structures in detail, such as when performing bulge-to-disk decomposition of galaxies with strong spiral arms, or quantifying the symmetry due to bright (e.g. bulge) and faint (e.g. disk) galaxy sub-components separately. These new techniques are implemented in GALFIT 3.0 (http://www.ociw.edu/ peng/work/galfit/galfit.html ). CYP gratefully acknowledges support from the Plaskett Fellowship (NRC-HIA) and the Institute/Giacconi Fellowship (STScI) programs.

  8. Detailed modeling and laser-induced fluorescence imaging of nitric oxide in a NH3-seeded non-premixed methane/air flame

    E-print Network

    Bell, John B.

    with ammonia in the fuel stream. We have performed numerical simulations with detailed chemistry as well as laser-induced fluorescence imaging measurements for a range of ammonia injec- tion rates. For comparison;2 Numerical Simulation of Premixed Turbulent Methane Combustion [2, 23, 24] and references therein), no study

  9. Adding the Morrill Act Logo to Your EMail Signature (PCs) 1. Place the logo image on your desktop or somewhere you can readily access it.

    E-print Network

    Jawitz, James W.

    Adding the Morrill Act Logo to Your EMail Signature (PCs) 1. Place the logo image on your desktop or somewhere you can readily access it. 2. In Outlook, open a new email. 3. At the top, you'll see an option for "Signature." Click on this and then choose "Signatures" to pull up your current email signature or to create

  10. Detailed effects of scattering and absorption by haze and aerosols in the atmosphere on the average point spread function of an imaging system.

    PubMed

    Hanafy, Mohamed E; Roggemann, Michael C; Guney, Durdu O

    2014-06-01

    The Earth's atmosphere has significant effects on the propagation of electromagnetic (EM) radiation and accordingly degrades the performance of electro-optical systems. These effects are attributed to atmospheric turbulence and to absorption and scattering of EM waves by atmospheric molecules and aerosols. In this paper we develop a detailed model of the effects of absorption and scattering on the optical radiation propagating from the object plane to an imaging system based on the classical theory of EM scattering. Scattering has the effect of de-correlating the light leaving the target from the unscattered light reaching the imaging system, and scattering has the effect of broadening the angle at which the scattered light arrives at the receiver compared to the unscattered light. Absorption has the effect of reducing the amount of power available for the image. Both of these effects depend upon the atmospheric species present, their EM properties, and wavelength. We use this detailed model to compute the average point spread function (PSF) of an imaging system that properly accounts for the effects of the diffraction and scattering, and the appropriate optical power level of both the unscattered and the scattered radiation arriving at the pupil of the imaging system. Since the scattered radiation is temporally and spatially de-correlated from the unscattered radiation, we model the effects of the unscattered radiation and the radiation scattered from the various species as additive in the image plane. The key result of this study is the significant effect of atmospheric scattering on the contrast and spatial resolution of images acquired by imaging systems, due to the increased level of the scattered radiation PSF and the reduced level of the direct radiation PSF, upon increasing the atmospheric optical depth. PMID:24977370

  11. A Test of Central Place Theory Using Shuttle Imaging Radar (SIR?A) of China's North Central Plain

    Microsoft Academic Search

    Christopher Shane Davies; Robert K. Holz; David Robertus

    1999-01-01

    This study utilizes radar imagery to test the application of Walter Christaller's central?place theory on China's North Central Plain. Examination of the spatial order and layout of settlements reveal that central place theory's transportation principle, k=4 exists. The study distinguishes four hierarchical settlement sizes and shows how effective rural societies are in evolving settlement structures whose spatial order and regularity

  12. High-resolution single-molecule recognition imaging of the molecular details of ricin-aptamer interaction

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The molecular details of DNA aptamer-ricin interactions were investigated. The toxic protein ricin molecules were immobilized on Au(111) surface using N-hydroxysuccinimide (NHS) ester to specifically react with lysine residues located on the ricin B chains. A single ricin molecule was visualized in ...

  13. Computed tomography:the details.

    SciTech Connect

    Doerry, Armin Walter

    2007-07-01

    Computed Tomography (CT) is a well established technique, particularly in medical imaging, but also applied in Synthetic Aperture Radar (SAR) imaging. Basic CT imaging via back-projection is treated in many texts, but often with insufficient detail to appreciate subtleties such as the role of non-uniform sampling densities. Herein are given some details often neglected in many texts.

  14. Resolving the surface details on Venus in the balloon- or lander-borne images with a computer modeling method

    NASA Astrophysics Data System (ADS)

    Ekonomov, A. P.

    2015-04-01

    Due to the presence of opaque clouds at high altitudes, it is difficult to survey the surface of Venus in the optical spectral range. At the same time, in the under-cloud layer, there are transparency windows at the wavelengths ? = 1.08, 0.85, and 0.65 ?m. At these wavelengths, the gaseous absorption (in the whole atmosphere rather than only in the under-cloud layer) is weaker, and the atmospheric transparency is mainly determined by the scattering on molecules. The paper presents the results of the Monte-Carlo computer modeling of the imaging of the surface from a balloon or a lander. It has been shown that the imaging from the lower boundary of the clouds is possible.

  15. Place Values

    NSDL National Science Digital Library

    AAA Math

    2007-12-12

    This site has explanatory lessons, interactive practice, and challenge games all dealing with place value. Includes information, practice, and games on place value of two, three, six and seven digit numbers and expandend notation for two, three, six, and seven digit numbers. Problems are randomly selected and students receive immediate feedback with the correct response. The bottom of each lesson page contains timed exercises.

  16. Label-free and highly sensitive optical imaging of detailed microcirculation within meninges and cortex in mice with the cranium left intact

    NASA Astrophysics Data System (ADS)

    Jia, Yali; An, Lin; Wang, Ruikang K.

    2010-05-01

    We demonstrate for the first time that the detailed blood flow distribution within intracranial dura mater and cortex can be visualized by an ultrahigh sensitive optical microangiography (UHS-OMAG). The study uses an UHS-OMAG system operating at 1310 nm with an imaging speed at 150 frames per second that requires ~10 s to complete one 3-D scan of ~2.5×2.5 mm2. The system is sensitive to blood flow with a velocity ranging from ~4 ?m/s to ~23 mm/s. We show superior performance of UHS-OMAG in providing functional images of capillary level microcirculation within meninges in mice with the cranium left intact, the results of which correlate well with the standard dural histopathology.

  17. Finite Element Analysis for Imaging Steel Bars Placed Under a Mild Steel Boundary Using Eddy Current Techniques

    NASA Astrophysics Data System (ADS)

    Hussin, H.; Zaid, M.; Gaydecki, P.; El-Madaani, F.; Fernandes, B.

    2006-03-01

    This paper reports on recent modelling results obtained using finite-element analysis for penetrating a magnetic field through a 2 mm steel boundary. The object is to detect 16 mm steel bars placed under mild steel boundaries at different operating frequencies. To penetrate thicker steel boundaries and increase the depth penetration, a different configuration based on remote field eddy currents (RFEC) has been modelled.

  18. Comparison of aSi:H CsI flat-panel digital imaging systems with a CCD-based system, CR systems, and conventional screen-film systems: a contrast-detail phantom study

    Microsoft Academic Search

    John X. Rong; Chris C. Shaw; Dennis A. Johnston; Michael R. Lemacks; Xinming Liu; Gary J. Whitman; Stephen K. Thompson; Kerry T. Krugh

    2001-01-01

    Low-contrast detail detectability was evaluated and compared for a flat-panel digital chest system, a computed radiography (CR) system and a conventional screen\\/film (SF) system. Images of a contrast-detail phantom were acquired using these three systems under identical conditions. Additional images were acquired at varied exposures to study the potential for reduction of patient exposure using the flat-panel system. The results

  19. YMCA National Safe Place

    NSDL National Science Digital Library

    In today's world where many social services for young people are being scaled back due to budgetary constraints, outreach programs such as Project Safe Place are important to know about. The program got its start in 1983 in Louisville, and since then has spread to many parts of the country. Essentially, the Safe Place program creates a network of locations (such as schools, fire stations, YMCAs, and libraries) where young people who may be distressed by difficult and threatening situations, such as domestic disputes or other such problems, can find help and support resources. On the site, visitors can learn in great detail about the program, find Safe Place locations around the country, and read about the organization's history and current leadership. One highlight to note on the site is the Teen Topics area, which has been designed specifically for teenagers as a place to read about topics they may have questions about, such as eating disorders, suicide, and teen crime.

  20. Detailed modeling and laser-induced fluorescence imaging of nitric oxide in a NH(i)-seeded non-premixed methane/air flame

    SciTech Connect

    Bell, John B.; Day, Marcus S.; Grcar, Joseph F.; Bessler, Wolfgang G.; Schulz, Christof; Glarborg, Peter; Jensen, Anker D.

    2001-12-14

    In this paper we study the formation of NO in laminar, nitrogen diluted methane diffusion flames that are seeded with ammonia in the fuel stream. We have performed numerical simulations with detailed chemistry as well as laser-induced fluorescence imaging measurements for a range of ammonia injection rates. For comparison with the experimental data, synthetic LIF images are calculated based on the numerical data accounting for temperature and fluorescence quenching effects. We demonstrate good agreement between measurements and computations. The LIF corrections inferred from the simulation are then used to calculate absolute NO mole fractions from the measured signal.The NO formation in both doped and undoped flames occurs in the flame sheet. In the undoped flame, four different mechanisms including thermal and prompt NO appear to contribute to NO formation. As the NH3 seeding level increases, fuel-NO becomes the dominant mechanism and N2 shifts from being a net reactant to being a net product. Nitric oxide in the undoped flame as well as in the core region of the doped flames are underpredicted by the model; we attribute this mainly to inaccuracies in the NO recycling chemistry on the fuel-rich side of the flame sheet.

  1. Place Value

    NSDL National Science Digital Library

    Mrs. Egan

    2008-09-11

    These activities will help you learn more about place value. You will get to play some fun games to sharpen your skills! First, let\\'s practice writing the word names of some numbers, and then practice writing numbers that go with the word names. Click the link below to play the game. The first time you play, choose \\"Method 1: Spell numbers, 0-100\\". Record your score on your paper. Then ...

  2. Place Value

    NSDL National Science Digital Library

    Mrs. Lindley

    2005-10-24

    These activities will help you learn more about place value. You will get to play some fun games to sharpen your skills! First, let\\'s practice writing the word names of some numbers, and then practice writing numbers that go with the word names. Click the link below to play the game. The first time you play, choose \\"Method 1: Spell numbers, 0-100\\". Record your score on your paper. Then ...

  3. Comparing Places

    NSDL National Science Digital Library

    This is an activity about identifying images of different space bodies and determining the cause of the craters pictured in each. Learners will use the Solar System Update software within Space Update to complete a worksheet. This is Solar System Activity 4 in Space Update.

  4. Cydonia Region - detail

    NASA Technical Reports Server (NTRS)

    1998-01-01

    Detail cut out of PIA01235, Mars Orbiter Camera (MOC) image of a 4.42 by 82.94 km area of the Cydonia Region. The left image is raw, the right has been filtered and contrast enhanced.

    Orbit: 220

    Range: 444.21 km

    Resolution: 4.32 m/pixel

    Emission angle: 44.66 degrees

    Incidence angle: 64.96 degrees

    Phase angle: 61.97 degrees

    Scan rate: 0.1 degree/sec

    Start time: periapsis + 375 sec

    Sequence submitted to JPL: Sat 04/04/98 15:15 PST

    Image acquired by MOC: Sun 04/05/98 00:39:37 PST

    Data retrieved from JPL: Mon 04/06/98 09:05 PDT

  5. 17. A closeup detail, looking east from the northeast corner ...

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

    17. A close-up detail, looking east from the northeast corner of the roadbed. This image shows the concrete commemorative inscription which is let into the inside of the eastern balustrade at the north end of the bridge. The name of one of the county commissioners has been chiselled out of the inscription. The parting fault between the parapet and its coping is evident. - Vigo County Bridge No. 139, Spanning Sugar Creek at Seventy-fourth Place, Terre Haute, Vigo County, IN

  6. Space Place Prime

    NASA Technical Reports Server (NTRS)

    Fitzpatrick, Austin J.; Novati, Alexander; Fisher, Diane K.; Leon, Nancy J.; Netting, Ruth

    2013-01-01

    Space Place Prime is public engagement and education software for use on iPad. It targets a multi-generational audience with news, images, videos, and educational articles from the Space Place Web site and other NASA sources. New content is downloaded daily (or whenever the user accesses the app) via the wireless connection. In addition to the Space Place Web site, several NASA RSS feeds are tapped to provide new content. Content is retained for the previous several days, or some number of editions of each feed. All content is controlled on the server side, so features about the latest news, or changes to any content, can be made without updating the app in the Apple Store. It gathers many popular NASA features into one app. The interface is a boundless, slidable- in-any-direction grid of images, unique for each feature, and iconized as image, video, or article. A tap opens the feature. An alternate list mode presents menus of images, videos, and articles separately. Favorites can be tagged for permanent archive. Face - book, Twitter, and e-mail connections make any feature shareable.

  7. Anteriorly placed splenic vein: a case report.

    PubMed

    Lal, Hira; Boruah, Deb K; Yadav, Ankusha; Samal, Amrita

    2015-04-01

    Splenic vein located anterior to pancreas is a rare congenital anomaly. To date, only one case has been reported in literature. A thorough knowledge of the normal anatomy, most frequent variations, and congenital and acquired anomalies of the spleno-portal axis is of great importance for hepatobiliary and pancreatic surgeons. It is therefore essential for preoperative evaluation of the anatomical details of the spleno-portal venous axis to be made by imaging. We report such a case of anteriorly placed splenic vein in a 40-year-old female prospective renal donor. To the best of our knowledge, this represents the second reported case of an anteriorly placed splenic vein. PMID:25972673

  8. Large landslides associated with a diapiric fold in Canelles Reservoir (Spanish Pyrenees): Detailed geological-geomorphological mapping, trenching and electrical resistivity imaging

    NASA Astrophysics Data System (ADS)

    Gutiérrez, Francisco; Linares, Rogelio; Roqué, Carles; Zarroca, Mario; Carbonel, Domingo; Rosell, Joan; Gutiérrez, Mateo

    2015-07-01

    Detailed geomorphological-geological mapping in Canelles Reservoir, the Spanish Pyrenees, reveals the presence of several large landslides overlooked in previous cartographic works. One of the slope movements, designated as the Canelles landslide, corresponds to a 40 × 106 m3 translational landslide reactivated in 2006 by a severe decline in the reservoir water level. The geomorphic features mapped in the upper part of the Canelles landslide, including surface ruptures corroborated by electrical resistivity imaging and trenching, indicate multiple displacement episodes previous to the 2006 human-induced event. Consistently, the stratigraphic and structural relationships observed in a trench record at least two displacement events older and larger in magnitude than the 2006 reactivation. The oldest recorded event occurred in the 6th to 7th Centuries and the second in 1262-1679 yr AD. This latter episode might be correlative to the 1373 Ribagorza earthquake (Mw 6.2), which caused the reactivation of a landslide and the consequent destruction of a village in the adjacent valley. The available data indicate that over more than one millennium the kinematics of the landslide has been characterised by discrete small-displacement episodes. These data, together with the available literature on rapid rockslides, do not concur with the acceleration predicted by modelling in a previous investigation, which foresees a speed of 16 m s- 1 despite the low average dip of the sliding surface (9-10°). This case study illustrates that the trenching technique may provide valuable practical information on the past behaviour of landslides, covering a much broader time span than instrumental and historical records.

  9. Center for Imaging Science Job Opportunities www.cis.rit.edu/jobs The CIS office does not have any more details on the external postings listed here.

    E-print Network

    Zanibbi, Richard

    Center for Imaging Science Job Opportunities www.cis.rit.edu/jobs The CIS office does not have any and to communicate effectively · Familiarity with imaging algorithms such as auto-exposure, auto-white balancing

  10. Center for Imaging Science Job Opportunities www.cis.rit.edu/jobs The CIS office does not have any more details on the external postings listed here.

    E-print Network

    Zanibbi, Richard

    recognition for 2D/3D biomedical / biometric applications. This person will partner with Canfield's image classification, or 3D image analysis. · Knowledge of C/C++ is highly desirable. · 3+ years experience with Mat Imaging Systems, a division of Canfield Scientific, Inc., is the leading supplier of digital photographic

  11. Science Fair Projects Project Details

    E-print Network

    Chiao, Jung-Chih

    Science Fair Projects Project Details Division Senior Category Biochemistry Title Microfluidics: A Pioneering Method for the Assessment and Prognosis of Cancer Metastasis Contestants PREETI SINGHAL Placement the chemoattractants were placed in the right well. Pictures were taken daily for seven days, and cell counts

  12. The Trade Card Place

    NSDL National Science Digital Library

    Author and collector Ben Crane maintains The Trade Card Place for "all who are interested in Victorian Trade Cards used to advertise American goods and services during the late 1800s." Although the site is geared toward collectors, hosting dealer, collector, and organization directories for the potential Victorian Trade Card buyer, advertising students may also be interested, as Crane includes articles on trade card history and, in his Victorian Scrapbook archive, has posted thumbnail images of cards on subjects ranging from beverages and clothing to toys and tobacco.

  13. Detailed imaging of the 2007 Pisco co-seismic and post-seismic deformation - implications on the seismogenic behavior of subduction megathrusts

    NASA Astrophysics Data System (ADS)

    Perfettini, H.; Sladen, A.; Avouac, J.; Simons, M.; Nocquet, J.; Bondoux, F.; Kositsky, A.; Chlieh, M.; Tavera, H.; Audin, L.; Konca, A.; Fielding, E. J.; Farber, D.; Ortega, F. H.

    2009-12-01

    In the last couple of decades, advances in the analysis techniques and instrumentation have improved significantly our capability to document the different stages of the seismic cycle, namely the co-, post- and inter-seismic phases. To this respect, the Mw8.0 Pisco, Peru, earthquake of August 2007 is exemplary, with numerous data sets allowing to explore the details of each phase and study their relationship. We derive a kinematic model of the coseismic rupture from the joint non-linear inversion of teleseismic and six Interferometric Synthetic Aperture Radar (InSAR) images. Our preferred model indicates a remarkable anti-correlation between the co-seismic slip distribution and the aftershock distribution determined from the Peruvian seismic network. The proposed source model is compatible with regional run-up measurements and open-ocean tsunami records. In particular, the tsunami observations validate that the rupture did not extend to the trench, and confirm that the Pisco event is not a tsunami earthquake despite its low apparent rupture velocity (< 1.5 km/s). We favor the interpretation that the earthquake consists of 2 subevents, each with a conventional rupture velocity (2-4 km/s). The delay between the 2 subevents might reflect the time for the second shock to nucleate or, alternatively, the time it took for afterslip to increase the stress level on the second asperity to a level necessary for static triggering. The source model predicts uplift offshore and subsidence onland with the pivot line following the changes in curvature of the coastline. This observation set the Pisco earthquake as one of the best examples of a link between the geomorphology of the coastline and the pattern of surface deformation induced by large interplate ruptures. The post-seismic deformation following the mainshock is studied using a local network of continuous GPS stations and the PCAIM inversion method. The inversion indicates that the two patches of co-seismic slip triggered aseismic frictional afterslip on two other adjacent patches. The most prominent of those post-seismic patches coincides with the subducting Nazca ridge, an area also characterized by a locally low interseismic coupling and which seems to have acted as a barrier to seismic rupture propagation repeatedly in the past. The ’seismogenic’ portion of the megathrust thus appears to be paved with interfingering of rate-weakening and rate-strengthening patches. The rate-strengthening patches are shown to contribute to an unsuspectedly high proportion of aseismic slip and to determine the extent and frequency of large interplate earthquakes. Aseismic slip accounts for as much as 50-70% of the slip budget on the seismogenic portion of the megathrust of central Peru and the return period of Mw 8.0 earthquakes in the Pisco area is estimated to 250 years.

  14. Mathematical Sciences 201011 Module Details Module Details

    E-print Network

    Wright, Francis

    Mathematical Sciences 2010­11 Module Details Module Details Modules are listed alphabetically values; paid up policies. Books Reading List · McCutcheon & Scott, An Introduction to the Mathematics in the CMBR; galaxy formation: the growth of fluctuations; effect of hot and cold dark matter; viable galaxy

  15. Center for Imaging Science Job Opportunities www.cis.rit.edu/jobs The CIS office does not have any more details on the external postings listed here.

    E-print Network

    Zanibbi, Richard

    for solid and metallic / effect pigmentations. Create color marketing electronic tools and practices-angle spectrophotometers, and relevant light physics. 5 years coatings formulation and pigment dispersion experience more details on the external postings listed here. Color Technology Scientist (Automotive Coatings) Our

  16. Center for Imaging Science Job Opportunities www.cis.rit.edu/jobs The CIS office does not have any more details on the external postings listed here.

    E-print Network

    Zanibbi, Richard

    more details on the external postings listed here. Harris Corporation ­ Geospatial Please pass the word in Florida and produce terrain data layers primarily for flight simulation and training. If they have any://download.harris.com/app/public_download.asp?fid=2367 Thanks. Mike =========================== Michael Fuller | Account Manager Geospatial Products

  17. Detailed imager evaluation and unique applications of a new 20x25-cm size mercuric iodide thick film x-ray detector

    NASA Astrophysics Data System (ADS)

    Zentai, George; Partain, Larry D.; Pavlyuchkova, Raisa; Proano, Cesar; Virshup, Gary F.; Breen, Barry N.; Vilensky, Alexander I.; Dagan, Ofer; Meerson, E.; Schieber, M.; Gilboa, Haim; Thomas, Jerry A.

    2003-07-01

    We previously reported on 2"x 2" and 4" x 4" size imagers, direct digital radiography X-ray detectors, based on photoconductive polycrystalline mercuric iodide deposited on a flat panel thin film transistor (TFT) array, as having great potential for use in medical imaging, NDE, and security applications. Recently we successfully upgraded our mercuric iodide deposition technique to 20 cm x 25 cm size, the size required in common NDE and security imaging applications. A TFT array with a pixel pitch of 127 microns was used for this imager. The mercuric iodide direct conversion layers were vacuum deposited onto TFT array by Physical Vapor Deposition (PVD). In addition to successful imager scale up, more sophisticated, non-TFT based detectors were developed in order to improve analysis methods of the mercuric iodide photoconductor. Measurements on mercuric iodide photoconductor were performed using a 36 x 6 electrode array on a 10cm x 10cm substrate (total of 216 measurement points). The array is formed by 36 palladium stripes on the glass substrate, upon which the mercuric iodide is deposited, and 6 palladium stripes that are deposited on top of the mercuric iodide layer. These two sets of electrodes are oriented at 90 degrees to each other to create the measurement matrix. These detectors were evaluated in radiographic mode, continuous fluoroscopic mode and pulsed fluoroscopic mode. Mercuric iodide coatings with thickness ranging between 140 microns and 300 microns were tested using beams with energies between 40 kVp and 100 kVp utilizing exposure ranges typical for both fluoroscopic and radiographic imaging. Diagnostic quality radiographic and fluroscopic images at up to 15 pulses per second were demonstrated. We evaluated the dark current, sensitivity and MTF characteristics. The MTF is determined primarily by the aperture and pitch of the TFT array with Nyquist frequency of ~3.93 mm-1 (127 micron pixel pitch). The MTF curve of a good quality HgI2 imager is very close to the theoretical sinc function. Image lag characteristics of mercuric iodide appear adequate for fluoroscopic rates.

  18. To cite this document: Place, Sbastien and Carrere, Jean-Pierre and Magnan, Pierre and Goiffon, Vincent and Roy, Franois Radiation effects on CMOS image

    E-print Network

    Mailhes, Corinne

    scheme. Index Terms-- Irradiation, APS, CMOS 4T image sensor, pinned photodiode, dark current, temporal, Vincent and Roy, François Radiation effects on CMOS image sensors with sub-2µm pinned photodiodes. (2011 noise, activation energy. I. INTRODUCTION HE recent trend of mobile phone market has established CMOS

  19. MAP-based kinetic analysis for voxel-by-voxel compartment model estimation: detailed imaging of the cerebral glucose metabolism using FDG.

    PubMed

    Kimura, Yuichi; Naganawa, Mika; Yamaguchi, Jun; Takabayashi, Yuki; Uchiyama, Akihiko; Oda, Keiichi; Ishii, Kenji; Ishiwata, Kiichi

    2006-02-15

    We propose a novel algorithm for voxel-by-voxel compartment model analysis based on a maximum a posteriori (MAP) algorithm. Voxel-by-voxel compartment model analysis can derive functional images of living tissues, but it suffers from high noise statistics in voxel-based PET data and extended calculation times. We initially set up a feature space of the target radiopharmaceutical composed of a measured plasma time activity curve and a set of compartment model parameters, and measured the noise distribution of the PET data. The dynamic PET data were projected onto the feature space, and then clustered using the Mahalanobis distance. Our method was validated using simulation studies, and compared with ROI-based ordinary kinetic analysis for FDG. The parametric images exhibited an acceptable linear relation with the simulations and the ROI-based results, and the calculation time took about 10 min. We therefore concluded that our proposed MAP-based algorithm is practical. PMID:16216532

  20. Placing Dental Implants

    MedlinePLUS

    Placing Dental Implants Before Placing an Implant Placing the Implants Complications from Surgery Implant Failure When you get implants, more ... Implant Most people are good candidates to get dental implants. You must have enough bone in your jaw ...

  1. My Special Place

    NSDL National Science Digital Library

    Sadredin Moosavi

    Students pick a place of significance to them (their Special Place) for analysis in this semester-long project. (A model is provided by the instructor using a place the students are not likely to have visited.)

  2. Drawing Designs in Detail

    NSDL National Science Digital Library

    Integrated Teaching and Learning Program,

    Students practice creating rudimentary detail drawings. They learn how engineers communicate the technical information about their designs using the basic components of detail drawings. They practice creating their own drawings of a three-dimensional block and a special LEGO piece, and then make 3D sketches of an unknown object using only the information provided in its detail drawing.

  3. A Detailed Gravitational Lens Model Based on Submillimeter Array and Keck Adaptive Optics Imaging of a Herschel-ATLAS Submillimeter Galaxy at z = 4.243

    NASA Astrophysics Data System (ADS)

    Bussmann, R. S.; Gurwell, M. A.; Fu, Hai; Smith, D. J. B.; Dye, S.; Auld, R.; Baes, M.; Baker, A. J.; Bonfield, D.; Cava, A.; Clements, D. L.; Cooray, A.; Coppin, K.; Dannerbauer, H.; Dariush, A.; De Zotti, G.; Dunne, L.; Eales, S.; Fritz, J.; Hopwood, R.; Ibar, E.; Ivison, R. J.; Jarvis, M. J.; Kim, S.; Leeuw, L. L.; Maddox, S.; Micha?owski, M. J.; Negrello, M.; Pascale, E.; Pohlen, M.; Riechers, D. A.; Rigby, E.; Scott, Douglas; Temi, P.; Van der Werf, P. P.; Wardlow, J.; Wilner, D.; Verma, A.

    2012-09-01

    We present high-spatial resolution imaging obtained with the Submillimeter Array (SMA) at 880 ?m and the Keck adaptive optics (AO) system at the K S-band of a gravitationally lensed submillimeter galaxy (SMG) at z = 4.243 discovered in the Herschel Astrophysical Terahertz Large Area Survey. The SMA data (angular resolution ?0farcs6) resolve the dust emission into multiple lensed images, while the Keck AO K S-band data (angular resolution ?0farcs1) resolve the lens into a pair of galaxies separated by 0farcs3. We present an optical spectrum of the foreground lens obtained with the Gemini-South telescope that provides a lens redshift of z lens = 0.595 ± 0.005. We develop and apply a new lens modeling technique in the visibility plane that shows that the SMG is magnified by a factor of ? = 4.1 ± 0.2 and has an intrinsic infrared (IR) luminosity of L IR = (2.1 ± 0.2) × 1013 L ?. We measure a half-light radius of the background source of r s = 4.4 ± 0.5 kpc which implies an IR luminosity surface density of ?IR = (3.4 ± 0.9) × 1011 L ? kpc-2, a value that is typical of z > 2 SMGs but significantly lower than IR luminous galaxies at z ~ 0. The two lens galaxies are compact (r lens ? 0.9 kpc) early-types with Einstein radii of ?E1 = 0.57 ± 0.01 and ?E2 = 0.40 ± 0.01 that imply masses of M lens1 = (7.4 ± 0.5) × 1010 M ? and M lens2 = (3.7 ± 0.3) × 1010 M ?. The two lensing galaxies are likely about to undergo a dissipationless merger, and the mass and size of the resultant system should be similar to other early-type galaxies at z ~ 0.6. This work highlights the importance of high spatial resolution imaging in developing models of strongly lensed galaxies discovered by Herschel. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.

  4. A DETAILED GRAVITATIONAL LENS MODEL BASED ON SUBMILLIMETER ARRAY AND KECK ADAPTIVE OPTICS IMAGING OF A HERSCHEL-ATLAS SUBMILLIMETER GALAXY AT z = 4.243 {sup ,} {sup ,}

    SciTech Connect

    Bussmann, R. S.; Gurwell, M. A. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Fu Hai; Cooray, A. [Department of Physics and Astronomy, University of California, Irvine, CA 92697 (United States); Smith, D. J. B.; Bonfield, D.; Dunne, L. [Centre for Astrophysics, Science and Technology Research Institute, University of Hertfordshire, Hatfield, Herts AL10 9AB (United Kingdom); Dye, S.; Eales, S. [School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom); Auld, R. [Cardiff University, School of Physics and Astronomy, Queens Buildings, The Parade, Cardiff CF24 3AA (United Kingdom); Baes, M.; Fritz, J. [Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent (Belgium); Baker, A. J. [Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019 (United States); Cava, A. [Departamento de Astrofisica, Facultad de CC. Fisicas, Universidad Complutense de Madrid, E-28040 Madrid (Spain); Clements, D. L.; Dariush, A. [Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ (United Kingdom); Coppin, K. [Department of Physics, McGill University, Ernest Rutherford Building, 3600 Rue University, Montreal, Quebec, H3A 2T8 (Canada); Dannerbauer, H. [Universitaet Wien, Institut fuer Astronomie, Tuerkenschanzstrasse 17, 1180 Wien, Oesterreich (Austria); De Zotti, G. [Universita di Padova, Dipto di Astronomia, Vicolo dell'Osservatorio 2, IT 35122, Padova (Italy); Hopwood, R., E-mail: rbussmann@cfa.harvard.edu [Department of Physics and Astronomy, Open University, Walton Hall, Milton Keynes, MK7 6AA (United Kingdom); and others

    2012-09-10

    We present high-spatial resolution imaging obtained with the Submillimeter Array (SMA) at 880 {mu}m and the Keck adaptive optics (AO) system at the K{sub S}-band of a gravitationally lensed submillimeter galaxy (SMG) at z = 4.243 discovered in the Herschel Astrophysical Terahertz Large Area Survey. The SMA data (angular resolution Almost-Equal-To 0.''6) resolve the dust emission into multiple lensed images, while the Keck AO K{sub S}-band data (angular resolution Almost-Equal-To 0.''1) resolve the lens into a pair of galaxies separated by 0.''3. We present an optical spectrum of the foreground lens obtained with the Gemini-South telescope that provides a lens redshift of z{sub lens} = 0.595 {+-} 0.005. We develop and apply a new lens modeling technique in the visibility plane that shows that the SMG is magnified by a factor of {mu} = 4.1 {+-} 0.2 and has an intrinsic infrared (IR) luminosity of L{sub IR} = (2.1 {+-} 0.2) Multiplication-Sign 10{sup 13} L{sub Sun }. We measure a half-light radius of the background source of r{sub s} = 4.4 {+-} 0.5 kpc which implies an IR luminosity surface density of {Sigma}{sub IR} (3.4 {+-} 0.9) Multiplication-Sign 10{sup 11} L{sub Sun} kpc{sup -2}, a value that is typical of z > 2 SMGs but significantly lower than IR luminous galaxies at z {approx} 0. The two lens galaxies are compact (r{sub lens} Almost-Equal-To 0.9 kpc) early-types with Einstein radii of {theta}{sub E1} 0.57 {+-} 0.01 and {theta}{sub E2} = 0.40 {+-} 0.01 that imply masses of M{sub lens1} = (7.4 {+-} 0.5) Multiplication-Sign 10{sup 10} M{sub Sun} and M{sub lens2} = (3.7 {+-} 0.3) Multiplication-Sign 10{sup 10} M{sub Sun }. The two lensing galaxies are likely about to undergo a dissipationless merger, and the mass and size of the resultant system should be similar to other early-type galaxies at z {approx} 0.6. This work highlights the importance of high spatial resolution imaging in developing models of strongly lensed galaxies discovered by Herschel.

  5. Detailed imaging and genetic analysis reveal a secondary BRAF(L505H) resistance mutation and extensive intrapatient heterogeneity in metastatic BRAF mutant melanoma patients treated with vemurafenib.

    PubMed

    Hoogstraat, Marlous; Gadellaa-van Hooijdonk, Christa G; Ubink, Inge; Besselink, Nicolle J M; Pieterse, Mark; Veldhuis, Wouter; van Stralen, Marijn; Meijer, Eelco F J; Willems, Stefan M; Hadders, Michael A; Kuilman, Thomas; Krijgsman, Oscar; Peeper, Daniel S; Koudijs, Marco J; Cuppen, Edwin; Voest, Emile E; Lolkema, Martijn P

    2015-05-01

    Resistance to treatment is the main problem of targeted treatment for cancer. We followed ten patients during treatment with vemurafenib, by three-dimensional imaging. In all patients, only a subset of lesions progressed. Next-generation DNA sequencing was performed on sequential biopsies in four patients to uncover mechanisms of resistance. In two patients, we identified mutations that explained resistance to vemurafenib; one of these patients had a secondary BRAF L505H mutation. This is the first observation of a secondary BRAF mutation in a vemurafenib-resistant patient-derived melanoma sample, which confirms the potential importance of the BRAF L505H mutation in the development of therapy resistance. Moreover, this study hints toward an important role for tumor heterogeneity in determining the outcome of targeted treatments. PMID:25515853

  6. GeoKansas: A Place to Learn About Kansas Geology

    NSDL National Science Digital Library

    Liz Brosius

    This website, part of the Kansas Geological Survey (KGS), contains educational information about Kansas geology, including images of geology from around the state, details about field trips, and a glossary with hundreds of geologic terms and various geologic places of interest sorted by region. Kansas Rocks describes various rocks by name and where they are found and Kansas Fossils describes fossil types and locations. Geo Topics describes various issues and subjects relating to state geology such as the age of the Earth, geologic time, rock nomenclature, an ID table for Kansas minerals with Mohs hardness scale, and coal, lead and zinc mining within the state.

  7. Place and Being

    ERIC Educational Resources Information Center

    Cannatella, Howard

    2007-01-01

    Do places matter educationally? When Edward Casey remarks: "The world is, minimally and forever, a place-world", we might take this statement as presupposing without argument that places exist as a given, that we know what a place is, a point that Aristotle would have never taken for granted and in fact neither does Casey. I find Casey's remark…

  8. Immigrant Teachers: Stories of Self and Place

    ERIC Educational Resources Information Center

    Elbaz-Luwisch, Freema

    2004-01-01

    Teachers' lives have been the focus of much recent research on teaching, and we now have rich, detailed understandings of how teachers develop a 'teaching self,' in the context of concrete details of biography, school settings, relationships and educational systems within which teachers work. What we lack is a sense of the teacher in a place--a…

  9. Images of a place and vacation preferences: Implications of the 1989 surveys for assessing the economic impacts of a nuclear waste repository in Nevada

    SciTech Connect

    Slovic, P.; Layman, M.; Flynn, J.H.

    1990-11-01

    In July, 1989 the authors produced a report titled Perceived Risk, Stigma, and Potential Economic Impacts of a High-Level Nuclear-Waste Repository in Nevada (Slovic et al., 1989). That report described a program of research designed to assess the potential impacts of a high-level nuclear waste repository at Yucca Mountain, Nevada upon tourism, retirement and job-related migration, and business development in Las Vegas and the state. It was concluded that adverse economic impacts potentially may result from two related social processes. Specifically, the study by Slovic et al. employed analyses of imagery in order to overcome concerns about the validity of direct questions regarding the influence of a nuclear-waste repository at Yucca Mountain upon a person`s future behaviors. During the latter months of 1989, data were collected in three major telephone surveys, designed to achieve the following objectives: (1) to replicate the results from the Phoenix, Arizona, surveys using samples from other populations that contribute to tourism, migration, and development in Nevada; (2) to retest the original Phoenix respondents to determine the stability of their images across an 18-month time period and to determine whether their vacation choices subsequent to the first survey were predictable from the images they produced in that original survey; (3) to elicit additional word-association images for the stimulus underground nuclear waste repository in order to determine whether the extreme negative images generated by the Phoenix respondents would occur with other samples of respondents; and (4) to develop and test a new method for imagery elicitation, based upon a rating technique rather than on word associations. 2 refs., 8 figs., 13 tabs.

  10. Imaging Magma Under St. Helens (iMUSH): Details of passive-source seismic deployment and preliminary 3-D velocity structure

    NASA Astrophysics Data System (ADS)

    Ulberg, C. W.; Creager, K. C.; Moran, S. C.; Abers, G. A.; Denlinger, R. P.; Hotovec-Ellis, A. J.; Vidale, J. E.; Kiser, E.; Levander, A.; Schultz, A.

    2014-12-01

    The imaging Magma Under St. Helens (iMUSH) experiment aims to delineate the extent of the magmatic system beneath Mount St. Helens (MSH) in Washington State. The experiment involves active- and passive-source seismology, magnetotellurics, and geochemistry/petrology. Seventy passive-source broadband seismometers were deployed in a 100-km-diameter array centered on MSH, with an average spacing of 10 km, and a planned duration of two years. The deployment over two weeks in June 2014 involved a group of 18 people split into 6 teams. Approximately half of the seismic stations have aircell batteries and/or pole-mounted solar panels in order to maintain power through deep snow at higher elevations during the winter months. Data will be retrieved 2-4 times a year throughout the duration of the experiment. The first service run performed in mid-July 2014 had a 98.4% data recovery. This is one of the largest wide-aperture two-dimensional arrays covering a volcano anywhere. The active-source portion of the experiment successfully set off 23 shots in late-July 2014. These were recorded clearly at permanent stations run by the Pacific Northwest Seismic Network up to 200 km away, and are expected to be well-recorded on many of the 70 broadband seismometers in addition to the 2500 Reftek "Texans" deployed temporarily for this purpose. For the 2-4 weeks of broadband data collected in July, local earthquakes down to magnitude 0 are recorded across the array, with clear P- and S- arrivals. Earthquakes of this size occur daily within 50 km of MSH. We are keeping a careful catalog of all activity in the region for the duration of the iMUSH experiment. We will pick P- and S-wave travel times at the 70 broadband stations from local earthquakes and active shots, for available data from between June and October 2014. We will also use a tomographic code (Preston et al, 2003, Science) to invert the travel times to obtain preliminary earthquake location and 3-D velocity structure.

  11. Two methods for voxel detail enhancement

    Microsoft Academic Search

    Adam M. Smith

    2011-01-01

    In this paper I describe a novel technique called voxel detail enhancement that, inspired by pixel art scaling algorithms for 2D images, produces finely detailed (3D) voxel maps from the coarser maps that would be edited by a player's actions during gameplay. I describe two methods which deterministically generate fine voxel fragments that depend only on the occupancy of a

  12. CISNET: Detail Documents

    Cancer.gov

    The detail documents pick up where the overview documents leave off. They provide a more fine-grained view of specific aspects of the model. While there is only one overview document of each type, there may be multiple detail documents of the same type in a single model profile.

  13. Geomorphology and place

    NSDL National Science Digital Library

    Margaret McMillan

    Students choose a place that is named based on its relationship to geomorphology. They research and describe the geologic template, geologic processes and time involved in the formation of their chosen place and use Google Earth to report their results.

  14. Place Value Rocks!

    NSDL National Science Digital Library

    Ms.Roberts

    2009-03-04

    Play these educational math games and test your knowledge of Place Value! Can you use Place Value Blocks to help you represent different digits? Test your ability to write out given numbers into sentences with Cookies! How sharp are your place value skills? Test your knowledge with Golfing with numbers!! Be the hero of the day as you practice place value skills in the Lifeguard game! Reveal the ...

  15. Place-Identity in Urban Settings.

    ERIC Educational Resources Information Center

    Proshansky, Harold M.

    The concept of place identity is a theoretical necessity for understanding the impact of the urban environment on the individual. Place identity refers to clusters of perceptions in the form of images, memories, facts, ideas, beliefs, values, and behavior tendencies relevant to the individual's existence in the physical world. These clusters are…

  16. Detailed balance and entanglement

    E-print Network

    Rocco Duvenhage; Machiel Snyman

    2015-03-27

    We study a connection between quantum detailed balance, which is a concept of importance in statistical mechanics, and entanglement. We also explore how this connection fits into thermofield dynamics.

  17. Mapping alteration minerals at prospect, outcrop and drill core scales using imaging spectrometry

    Microsoft Academic Search

    Fred A. Kruse; Richard L. Bedell; James V. Taranik; William A. Peppin; Oliver Weatherbee; Wendy M. Calvin

    2012-01-01

    Imaging spectrometer data (also known as ‘hyperspectral imagery’ or HSI) are well established for detailed mineral mapping from airborne and satellite systems. Overhead data, however, have substantial additional potential when used together with ground-based measurements. An imaging spectrometer system was used to acquire airborne measurements and to image in-place outcrops (mine walls) and boxed drill core and rock chips using

  18. Mapping alteration minerals at prospect, outcrop and drill core scales using imaging spectrometry

    Microsoft Academic Search

    Fred A. Kruse; Richard L. Bedell; James V. Taranik; William A. Peppin; Oliver Weatherbee; Wendy M. Calvin

    2011-01-01

    Imaging spectrometer data (also known as ‘hyperspectral imagery’ or HSI) are well established for detailed mineral mapping from airborne and satellite systems. Overhead data, however, have substantial additional potential when used together with ground-based measurements. An imaging spectrometer system was used to acquire airborne measurements and to image in-place outcrops (mine walls) and boxed drill core and rock chips using

  19. Place Value Frenzy

    NSDL National Science Digital Library

    Miss Carter

    2006-11-04

    Today, we are going to practice place value. Please read all directions below. Play Find the Place Value 1 time. Leave, name to appear on title, Blank. Leave, minimum number, on 1 . Put the maximum number on 1000. Then, click on generate to start game. Play Place Value 2 times. When the webpage comes up click on countdown to play the game. Play Frog Palace 1 time. Please ...

  20. Place Value Fun!

    NSDL National Science Digital Library

    Mr. Holmgren

    2005-10-25

    The activities on this page will help you to better understand place value in hundreds, tens and ones. -To start out think back on what you have learned about place value. We have learned that in our system of numbers we seperate numbers into hundreds, tens and ones. -Take out a piece of writing paper and place your name at the top. You will use this paper to ...

  1. Arch & Chord Joint Detail; Crossbracing Center Joint Detail; Chord, ...

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

    Arch & Chord Joint Detail; Crossbracing Center Joint Detail; Chord, Panel Post, Tie & Diagonal Brace Joint Detail; Chord, Panel Post, Tie & Crossbracing Joint Detail - Dunlapsville Covered Bridge, Spanning East Fork Whitewater River, Dunlapsville, Union County, IN

  2. Chord Splicing & Joining Detail; Chord & CrossBracing Joint Details; ...

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

    Chord Splicing & Joining Detail; Chord & Cross-Bracing Joint Details; Cross Bracing Center Joint Detail; Chord & Diagonal Joint Detail - Vermont Covered Bridge, Highland Park, spanning Kokomo Creek at West end of Deffenbaugh Street (moved to), Kokomo, Howard County, IN

  3. Mouse Repository Strain Details

    Cancer.gov

    Available Strain Details Order Form for Cryoarchived Strains   Strain Number: 01XE7  Common Strain Name: Villin-Cre, vil-Cre Fo20  Strain Nomenclature: B6.Cg-Tg(Vil-cre)20Sy/Nci  Release Category (Required for MTA form): B1 , D Sample MTA for this

  4. Detail of pahoehoe lobe

    USGS Multimedia Gallery

    A detail of a pahoehoe lobe at the top of a tumulus. The upper crust that is lifted up during the formation of a tumulus is typically quite vesicular (has lots of bubbled trapped in it). Roza Formation, Columbia River Basalt Group. Southwest of Quincy, WA. Tumuli are structures usually associated w...

  5. Mouse Repository Strain Details

    Cancer.gov

    Available Strain Details Order Form for Cryoarchived Strains   Strain Number: 01XB8  Common Strain Name: Brca1 floxed (FVB;129)  Strain Nomenclature: FVB;129-Brca1tm1Brn/Nci  Release Category (Required for MTA form): C2 , D Sample MTA for this strain Strain

  6. Mouse Repository Strain Details

    Cancer.gov

    Available Strain Details Order Form for Live Mice   Strain Number: 01XBL  Common Strain Name: Myf6-ires-cre knock-in  Strain Nomenclature: B6;129-Myf6tm2(cre)Mrc/Nci  Release Category (Required for MTA form): C1 , D Sample MTA for this strain Animal

  7. Position Summary Employee Details

    E-print Network

    California at Davis, University of

    Position Summary Employee Details Employee First Name: Employee Last Name: Open Position Employee Overtime Eligible: (FLSA) Non-Exempt Employee Relations Unit: (Bargaining Unit) SX Representation: Covered as a resource for lifelong education and community engagement. Visitor safety and comfort are essential

  8. Schooling Out of Place

    ERIC Educational Resources Information Center

    McConaghy, Cathryn

    2006-01-01

    Education in rural communities is an interesting site for an analysis of the relationship between place and the cultural politics of schooling. In particular the movements of people, ideas and practices to and from, and also within, rural places suggest the need for theorizing on rural education to consider the relevance of new mobility…

  9. Place the Penquins

    NSDL National Science Digital Library

    2013-01-01

    This Flash activity promotes understanding of the concept of place value. Players are prompted to place penguins on the correct multiple of 100, 10 and 1 in the number grid to compose the given number. There is an easier level of just tens and units.

  10. Decimal Place Value

    NSDL National Science Digital Library

    Teacher Vision

    2012-08-02

    Students learn about decimal place value and the relationship between tenths, hundredths, and thousandths. Students will explore decimal place value, read and write decimals using tenths, hundredths, and thousandths, and compare decimals using greater-than and less-than notation.

  11. Understanding Place Value

    ERIC Educational Resources Information Center

    Cooper, Linda L.; Tomayko, Ming C.

    2011-01-01

    Developing an understanding of place value and the base-ten number system is considered a fundamental goal of the early primary grades. For years, teachers have anecdotally reported that students struggle with place-value concepts. Among the common errors cited are misreading such numbers as 26 and 62 by seeing them as identical in meaning,…

  12. Teaching Bodies in Place

    ERIC Educational Resources Information Center

    Jones, Stephanie; Woglom, James F.

    2013-01-01

    Background/Context: This piece draws on literature in justice-oriented teacher education, feminist pedagogy, and postmodern notions of bodies and place to make sense of data generated from a three-year study of an undergraduate teacher education course. A feminist lens was used to engage a body- and place-focused pedagogy that aimed to engage…

  13. Place My Past

    NSDL National Science Digital Library

    2014-05-08

    Place My Past is a handy application designed to map a family history via historical maps made available online. After uploading family information, visitors can use the annotation tools to mark places on the map for future reference and use. It's a great way to bring a few different worlds together and it's compatible with all operating systems.

  14. More Place Value Activities

    NSDL National Science Digital Library

    Terry Kawas

    2010-01-01

    This webpage contains instructions for several activities and games designed to develop students' understanding of place value while reinforcing addition and subtraction skills. Downloadable materials and suggestions for variations are included along with links to online games. This is the second of two pages of similar activities. The first, Place Value Activities, is catalogued separately.

  15. The Rhetoric of Place.

    ERIC Educational Resources Information Center

    Hecht, Roger W.

    At Syracuse University (New York), Writing 205 offers students an introduction to the principles of rhetoric and the concept of disciplinary discourse. The study of landscape and place serves as a conduit for students to explore design, intention, and audience--a rhetoric of place--in order to develop a comprehension which is then easily…

  16. Supporting Information Experimental details

    E-print Network

    Lloyd, David

    is found insignificant to the selection of emerging symmetry. Scanning electron microscopy (SEM) images prepared using a FEI Nova Nanolab 600 Dual Beam Microscope that combines a high-resolution field emission SEM with a focused ion beam (FIB) for etching and deposition. The micro-cones are first covered

  17. Illilouette Falls Detail

    USGS Multimedia Gallery

    In this image, Illilouettea Falls, a tributary of the Merced River can be seen just upstream of Happy Isles and the USGS Benchmark Streamgage in Yosemite National Park. The Merced River is a 145 mile (233 km) long tributary of the San Joaquin River. It drains a large section of the Sierra Nevad...

  18. Supporting Information Experimental Details

    E-print Network

    Scherer, Norbert F.

    imaging of the nanoparticles was carried out with a Tecnai F30 STEM/TEM microscope, which is equipped diameter ~50 nm (standard deviation ~ 20%) and a fraction (5~10%) of nanorods with various aspect ratios. 2. SH Measurements and Data Processing A specially designed Si3N4 window TEM grid (3 mm diameter Si

  19. Images

    Cancer.gov

    Home News and Events Multimedia Library Images Images:  Cancer Biology Image: Cell with DNA 72 DPI | 300 DPIDrawing depicting DNA molecule unwinding from a chromosome inside the nucleus of a cell. NHGRI >> View All Cancer Pathology/Imaging Image: Female

  20. A Sense of Place

    E-print Network

    Cogorno, David

    2010-04-29

    The concept of "place" is a mental construction that we, as humans, create to give importance to a location. The experience of authentic human attachment to an environment is a phenomenon all people can relate to. Through interactions with a...

  1. Place Value Made Simple

    NSDL National Science Digital Library

    National Security Agency Central Security Service

    2009-05-19

    Students will read, write, and represent whole numbers from 0 - 1,000,000 using symbols, models, expanded form, and words. Base ten blocks, place value pocket charts, folded paper strips for expanded form accordions, and checks are used.

  2. The Expanding Place Value

    NSDL National Science Digital Library

    Erin Thomson

    2005-01-01

    This collection of three lesson plans is designed to provide students with practice understanding place value (0 to 999), using standard and word form to represent numbers, and using expanded form to represent place value. Each lesson plan provides activities that will help build student understanding of the concepts and practice to help reinforce the skill. Thirteen resource sheets are included and can be used with these lessons or as independent activities.

  3. Artist Place Settings

    ERIC Educational Resources Information Center

    Pellegrino, Linda

    2009-01-01

    Art history can be a little dry at times, but the author is always trying to incorporate new ways of teaching it. In this article, she describes a project in which students were to create a place setting out of clay that had to be unified through a famous artist's style. This place setting had to consist of at least five pieces (dinner plate, cup…

  4. Dis-placed voices: sense of place and place-identity on the Sunshine Coast

    Microsoft Academic Search

    Jennifer Carter; Pam Dyer; Bishnu Sharma

    2007-01-01

    The geographical literature on place interrogates, amongst other notions, sense of place, place identity, and their connections or disruptions. Although notions of place are multiple and very fluid, place transformation in rural and regional areas may be more rapid than the changing understandings of place held by residents. This research examines notions of place held by residents on the Sunshine

  5. Details of meiosis

    SciTech Connect

    NONE

    1993-12-31

    Chapter 18, discusses the details of meiosis, beginning with the structure and number of chiasmata, i.e., the cytological term for two homologous chromosomes forming a bivalent which begin to repel each other until they are held together only at the point of crossing-over. The synaptonemal complex which consists of two lateral elements which contain protein and RNA is also discussed. The chapter concludes with a description of meiosis in polyploids, human meiosis, and the behavior of X and Y chromosomes. 28 refs., 8 figs.

  6. Horizontal Cross Bracing Detail, Vertical Cross Bracing Detail, Horizontal Cross ...

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

    Horizontal Cross Bracing Detail, Vertical Cross Bracing Detail, Horizontal Cross Bracing Joint, Vertical Cross Bracing End Detail - Ceylon Covered Bridge, Limberlost Park, spanning Wabash River at County Road 900 South, Geneva, Adams County, IN

  7. roof truss detail, historic strap hinge detail Chopawamsic Recreational ...

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

    roof truss detail, historic strap hinge detail - Chopawamsic Recreational Demonstration Area - Cabin Camp 1, Main Arts and Crafts Lodge, Prince William Forest Park, Triangle, Prince William County, VA

  8. double hung window details, hall window details, entrance door profiles ...

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

    double hung window details, hall window details, entrance door profiles - Chopawamsic Recreational Demonstration Area - Cabin Camp 1, Help's Quarters, Prince William Forest Park, Triangle, Prince William County, VA

  9. Detail of Bridalveil Fall from Tunnel View

    USGS Multimedia Gallery

    In this image, Bridalveil Fall can be seen in detail from Tunnel View in Yosemite National Park. The waterfall is 617 ft (188 m) in height and is one of the most well-known of Yosemite National Park's waterfalls....

  10. Montana Place Names Companion

    NSDL National Science Digital Library

    Billed as covering everything from "Alzada to Zortman", the Montana Place Names Companion website tells the story of Montana's place names. The project began years ago at the reference desk at the Montana Historical Society Research Center in Helena when a patron called about the origin of a mountain peak name. Over the years, a team of dedicated individuals began to compile thousands of pieces of information about cities, rivers, and mountains across the Big Sky state. Now all of this material can be found here, courtesy of the National Resource Information System at the Montana State Library. Visitors can select a place name from the drop-down menu, type in a keyword, or click on the interactive map of the state. First-time visitors may wish to start by looking at Absarokee, Porcupine Butte, and Swimming Woman Creek.

  11. Common-place

    NSDL National Science Digital Library

    This promising new quarterly online publication situates itself somewhere between a popular magazine and scholarly journal, offering a common place for a variety of readers "to explore and exchange ideas about American history." Similar in some ways to the UK-based popular history magazine History Today, Common-place offers a mix of articles, short features, and reviews aimed at an interested and informed, but not necessarily academic, audience. A discussion board is planned for the near future, and users may subscribe for email notification of new issues.

  12. Faraway Places, Fabulous Journeys: Travels on Paper, 1450-1700

    NSDL National Science Digital Library

    2007-01-01

    Using this small web feature from the National Gallery of Art, visitors can closely examine four relatively fragile and little seen works from the Gallery's collections: The Triumph of Dionysus, ca. 1598, an etching by Pierre Brebiette; The Land of Cockaigne, 1564, an etching by Niccol" Nelli; seven scenes from The Journey to Constantinople, published 1553, a woodcut by Pieter Coecke van Aelst; and Etow Oh Koam, King of the River Nation, ca. 1710, a mezzotint by John Simon. What these works have in common (as well as the sixty works on paper on view at the museum thorough September 16, 2007) is that they were created to give Europeans a glimpse of distant and imaginary places, at a time when images were in much shorter supply than at present, and photography did not exist. Each print is presented with numbered details that can be moused over for more information. For example, in the mythical Land of Cockaigne there is a pot on top of a mountain of cinnamon that spews out pasta. It is also possible to zoom in on any of the images, for a close up of additional details, such as the turtle totem of Etow Oh Koam.

  13. 7. DETAIL, NOTCHED ROUGH HEWN JOINTS AND BEAMS PLUS WINDOW ...

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

    7. DETAIL, NOTCHED ROUGH HEWN JOINTS AND BEAMS PLUS WINDOW UNDER 1ST FLOOR PORCH, SOUTH ELEVATION, LOOKING NORTH-NORTHWEST. - Fort Leavenworth, Building No. 17, 20-22 Sumner Place, Leavenworth, Leavenworth County, KS

  14. INTERIOR DETAIL, WINDOW OPENING ONTO THE SERVICE STAIR FROM DINING ...

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

    INTERIOR DETAIL, WINDOW OPENING ONTO THE SERVICE STAIR FROM DINING ROOM PASSAGE. OPENINGS LIKE THESE ARE PRESENT IN A NUMBER OF PLACES, ?BORROWING LIGHT? FOR OTHERWISE DARK INTERIOR SPACES - The Woodlands, 4000 Woodlands Avenue, Philadelphia, Philadelphia County, PA

  15. Exterior oblique detail view of typical sidewalk entry at north ...

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

    Exterior oblique detail view of typical sidewalk entry at north side of Building 3 from Bay Street sidewalk, looking southeast - North Beach Place, 475 Bay Street, 475 Bay Street, San Francisco, San Francisco County, CA

  16. Round ceiling detail, note tension wires working against outward forces ...

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

    Round ceiling detail, note tension wires working against outward forces on the vertical columns while restoration of collapsed roof takes place. - Baltimore & Ohio Railroad, Mount Clare Passenger Car Shop, Southwest corner of Pratt & Poppleton Streets, Baltimore, Independent City, MD

  17. 5. EAST ELEVATION (OFFICE BLOCK), DETAIL SHOWING DECORATIVE PILASTERS AND ...

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

    5. EAST ELEVATION (OFFICE BLOCK), DETAIL SHOWING DECORATIVE PILASTERS AND STYLIZED EGG-AND-DART DECORATION AROUND WINDOWS OF UPPER FLOORS - Delaware, Lackawanna & Western Railroad & Ferry Terminal, Hudson Place, Hoboken, Hudson County, NJ

  18. 20. Detail, Pier 3, with large stone riprap showing depth ...

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

    20. Detail, Pier 3, with large stone riprap showing depth of scour which has taken place since bridge was completed; view to northwest. - Parks Bar Bridge, Spanning Yuba River at State Highway 20, Smartville, Yuba County, CA

  19. Detail of rounded casement cover over rooms between gun chambers, ...

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

    Detail of rounded casement cover over rooms between gun chambers, with modern stair from terrace in foreground - U.S. Naval Base, Pearl Harbor, Battery Adair, Princeton Place, Pearl City, Honolulu County, HI

  20. Finding Place in Education

    ERIC Educational Resources Information Center

    Peters, Chris

    2011-01-01

    As a society, we are less and less comfortable in our localities. We have embraced the idea of a globalized placelessness, where everything, everywhere, resonates with a sameness. What do we lose, educationally and in society at large, when we reduce our inhabited places to those components that provide material wealth alone? If students and…

  1. Narrative in Unexpected Places.

    ERIC Educational Resources Information Center

    Lytle, Mark

    1991-01-01

    Proposes to return narrative to a more central place in historical writing. Answers critics who complain that history texts do not properly emphasize democracy and citizenship. Suggests using narrative to tell stories students will remember while including a major theme or conclusion. Warns against overuse, wordiness, and sacrifice of human…

  2. Education Place: Outline Maps

    NSDL National Science Digital Library

    This page from Education Place's Social Studies Center lists a selection of outline maps for use in the classroom or at home. Sample maps include Africa: Political; Africa: Political and Physical; California's Regions; Colonial America, 1776; Eastern Hemisphere; Southern Asia: Political; United States: Postal Abbreviations; United States: Climate; The United States in 1860. It contains also five maps with different views of the world.

  3. Teaching With Historic Places.

    ERIC Educational Resources Information Center

    Greenberg, Ronald M., Ed.

    1993-01-01

    Designed for social studies educators, this theme issue presents 11 articles about historic places that feature a variety of ideas for elementary and secondary lesson plans, curricula, and program development. The articles are: (1) "Where did History Happen?" (Beth M. Boland); (2) "Creating a Partnership" (Carol D. Shull); (3) "Heritage Education:…

  4. Art for Public Places

    ERIC Educational Resources Information Center

    Wall, Sharon

    2004-01-01

    In response to a challenge by a school administrator for "some sort of mural" in the high school where she teaches art, the author of this article created a course called Art for Public Places. She wanted to create a course that would promote a sense of community among students in the class and ownership in their school environment. Also, she…

  5. The Value of Place

    ERIC Educational Resources Information Center

    Dentzau, Michael W.

    2014-01-01

    This commentary seeks to expand the dialogue on place-based science education presented in Katie Lynn Brkich's article, where the connections fifth grade students make between their formal earth science curriculum and their lived experiences are highlighted. The disconnect between the curriculum the students are offered and their immediate…

  6. Place Value Mathlets

    NSDL National Science Digital Library

    2014-01-01

    This series of interactive JavaScript applets helps children understand place value in our base-10 system. The mathlets provide visual models of what happens as one counts by various powers of 10 in a progression from single units to tokens representing groups to a position-based numeration system. The resource includes an explanation of each applet.

  7. Tracking Self into Place

    ERIC Educational Resources Information Center

    Piersol, Laura

    2010-01-01

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

  8. Universities Are Funny Places!

    ERIC Educational Resources Information Center

    Lawless, Ann

    2006-01-01

    Universities are funny places. They have a strong sense of hierarchy and rank. They have an amazing disparity in salary levels and status between staff, are class conscious, and are run by a large bureaucracy that oils and keeps the machinery going. They operate as educational institutions and yet also are entrepreneurial, marketing themselves in…

  9. Crowdsourcing detailed flood data

    NASA Astrophysics Data System (ADS)

    Walliman, Nicholas; Ogden, Ray; Amouzad*, Shahrzhad

    2015-04-01

    Over the last decade the average annual loss across the European Union due to flooding has been 4.5bn Euros, but increasingly intense rainfall, as well as population growth, urbanisation and the rising costs of asset replacements, may see this rise to 23bn Euros a year by 2050. Equally disturbing are the profound social costs to individuals, families and communities which in addition to loss of lives include: loss of livelihoods, decreased purchasing and production power, relocation and migration, adverse psychosocial effects, and hindrance of economic growth and development. Flood prediction, management and defence strategies rely on the availability of accurate information and flood modelling. Whilst automated data gathering (by measurement and satellite) of the extent of flooding is already advanced it is least reliable in urban and physically complex geographies where often the need for precise estimation is most acute. Crowdsourced data of actual flood events is a potentially critical component of this allowing improved accuracy in situations and identifying the effects of local landscape and topography where the height of a simple kerb, or discontinuity in a boundary wall can have profound importance. Mobile 'App' based data acquisition using crowdsourcing in critical areas can combine camera records with GPS positional data and time, as well as descriptive data relating to the event. This will automatically produce a dataset, managed in ArcView GIS, with the potential for follow up calls to get more information through structured scripts for each strand. Through this local residents can provide highly detailed information that can be reflected in sophisticated flood protection models and be core to framing urban resilience strategies and optimising the effectiveness of investment. This paper will describe this pioneering approach that will develop flood event data in support of systems that will advance existing approaches such as developed in the in the UK in the more generalised RASP project (DEFRA and the Environment Agency), and in line with the expressed needs of the ABI (Association of British Insurers) and National Flood Forum. The detailed data produced will also support improved flood risk assessment for the provision of affordable insurance.

  10. Faces and Places Sustainability

    E-print Network

    -2008); UH Foundation (alumni data, July 2008) Maps adapted from images developed by the Hawai`i Synergy Project using NASA satellite data; UH site and facility locations are approximate The University of Hawai

  11. Finding Your Place in Art History.

    ERIC Educational Resources Information Center

    Murphy, Lauren Parmelee

    2003-01-01

    Describes an art history project used with fifth-grade students where they selected a famous painting as a background for a self-portrait. Explains how the students used Adobe Photoshop to place a digital photograph of themselves into a scanned image of the artwork. (CMK)

  12. 17. DETAIL OF INTERIOR AND EXTERIOR WALL CONSTRUCTION, VIEW TOWARD ...

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

    17. DETAIL OF INTERIOR AND EXTERIOR WALL CONSTRUCTION, VIEW TOWARD NORTHEAST CORNER, THIRD BAY Showing insulated exterior wall at right; asphalt felt on interior separation wall at left; sill beam, stud, and concrete foundation detailing of interior wall. - U.S. Military Academy, Ice House, Mills Road at Howze Place, West Point, Orange County, NY

  13. Detail of pumps in troughs, detail of truss attachment ...

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

    Detail of pumps in troughs, detail of truss - attachment to the wall - as well as the troughs themselves. Interior of the main hatchery building, view to the east. - Prairie Creek Fish Hatchery, Hwy. 101, Orick, Humboldt County, CA

  14. 6. Detail of front entry on E elevation. Detail of ...

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

    6. Detail of front entry on E elevation. Detail of round, terra cotta medallions on E elevation indicating date of building. - Central of Georgia Railway, Red (Administration) Building, 233 West Broad Street, Savannah, Chatham County, GA

  15. The Greatest Places

    NSDL National Science Digital Library

    Associated with the Science Museum of Minnesota, this Web site is a companion to the large-format film "The Greatest Places." Each of seven geographically diverse areas are featured, along with selected aspects of their culture and biological resources. The Okovango Delta and Madagascar sections have a stronger focus on the flora and fauna of the areas, while the others focus more on the culture and geography. This site is an interesting taste of seven unique areas and includes plenty of links for those who are looking for more.

  16. Images

    Microsoft Academic Search

    Russell K. Hobbie; Bradley J. Roth

    Images are very important in the remainder of this book. They may be formed by the eye, a camera, an xray machine, a nuclear\\u000a medicine camera, magnetic resonance imaging, or ultrasound. The concepts developed in Chapter 11 can be used to understand\\u000a and describe image quality. The same concepts are also used to reconstruct computed tomographic or magnetic resonance slice

  17. Space Place: Cosmic Colors

    NSDL National Science Digital Library

    2012-12-06

    This interactive, web-based activity allows children to see the universe in many different wavelengths of light - light our eyes can and cannot see. To use the viewer, first select a celestial object (planet, galaxy, etc.), then select an electromagnetic wavelength range to view it (e.g., visible, ultraviolet, infrared). Images are from various ground- and space-based telescopes. In addition, background information is provided on the electromagnetic spectrum and selected telescopes designed to detect specific regions of light.

  18. The Biology Place

    NSDL National Science Digital Library

    If you are interested in what the future of educational resources on the Internet may look like, visit the Biology Place. This resource for teachers in the biological sciences will have a "grand opening" on August 19th, but is available now for previewing. For four weeks after the site's opening, all resources will be free of charge; then each teacher (along with up to 250 of his/her students) will be charged a fee for an academic-year registration (site licenses are available). Nine high school and college faculty members are responsible for content areas: chemistry, cells, genetics, evolution, diversity, plants, animals, and ecology. Although only the genetics section is fully active during the prototype stage, each section will contain student activities, selected web resources, and research news. Instructors will also find teachers' forums and curriculum materials.

  19. Place memory in crickets

    PubMed Central

    Wessnitzer, Jan; Mangan, Michael; Webb, Barbara

    2008-01-01

    Certain insect species are known to relocate nest or food sites using landmarks, but the generality of this capability among insects, and whether insect place memory can be used in novel task settings, is not known. We tested the ability of crickets to use surrounding visual cues to relocate an invisible target in an analogue of the Morris water maze, a standard paradigm for spatial memory tests on rodents. Adult female Gryllus bimaculatus were released into an arena with a floor heated to an aversive temperature, with one hidden cool spot. Over 10 trials, the time taken to find the cool spot decreased significantly. The best performance was obtained when a natural scene was provided on the arena walls. Animals can relocate the position from novel starting points. When the scene is rotated, they preferentially approach the fictive target position corresponding to the rotation. We note that this navigational capability does not necessarily imply the animal has an internal spatial representation. PMID:18230590

  20. Digital Imaging Skills and the Hiring and Training of Photojournalists.

    ERIC Educational Resources Information Center

    Russial, John; Wanta, Wayne

    1998-01-01

    Uses a national survey to examine the importance newspaper photo editors place on digital imaging and traditional photography competencies, detailing the degree of technological change in newspaper photography. Looks at implications for the training of journalists as well as their hiring. (SR)

  1. 17. DETAIL VIEW OF PORT SIDE ENGINE, BATTERIES, AND FUEL ...

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

    17. DETAIL VIEW OF PORT SIDE ENGINE, BATTERIES, AND FUEL TANK; INTERIOR OF SHIP'S HEAD SHOWN IN LEFT OF IMAGE - Pilot Schooner "Alabama", Moored in harbor at Vineyard Haven, Vineyard Haven, Dukes County, MA

  2. K-8 Kids' Place

    NSDL National Science Digital Library

    Developed by Houghton Mifflin, this site contains a number of helpful online educational, interactive materials for students from kindergarten to 8th grade. The Web site is divided into three main sections: School Books, Games, and Brain Power. In School Books, students have the ability to pick from a number of activities ranging from spelling quizzes, mathematic skills reviews, and reading activities for grades 1 through 6. Several of the activity areas here are also available in Spanish. The Brain Power section contains a number of activities designed to challenge and hone the analytic and problem-solving abilities of young people. The questions are geared for students in grades 3 through 8, and an archive containing the previous three week's questions is available for perusal. The Games section features four different activities, including Fake Out! -- where students guess the definition of a word and also have the ability to submit their own fake definitions. Additionally, Houghton Mifflin has placed a statement online regarding its commitment to protecting the privacy of children using the site. [KMG

  3. Time, Place, and Content 53 Time, Place, and Content

    E-print Network

    Cook, Robert

    Time, Place, and Content 53 Time, Place, and Content Jonathon D. Crystal University of Georgia The goal of this article is to integrate information about basic mechanisms of time perception with research on time-place learning and research on the discrimination of what, when, and where (WWW). Several

  4. Remembering Places: Student Reliance on Place in Timed Essays

    ERIC Educational Resources Information Center

    Evans, Donna

    2009-01-01

    This is the story of a research journey that follows the trail of a novel evaluand--"place." I examine place as mentioned by rising juniors in timed exams. Using a hybridized methodology--the qualitative approach of a hermeneutic dialectic process as described by Guba and Lincoln (1989), and the quantitative evidence of place mention--I query…

  5. 24. INTERIOR DETAIL FROM THE SOUTH END OF THE DELIVERY ...

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

    24. INTERIOR DETAIL FROM THE SOUTH END OF THE DELIVERY (RECEIVING LEVEL. THE DETAIL SHOWS THE WINDING DRUM AND REVERSING CLUTCH FOR THE TRAMWAY ORE CAR, AND AN ORE CHUTE IN THE FLOOR) FOREGROUND BOTTOM LEFT OF THE IMAGE). - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

  6. LCIS: a boundary hierarchy for detail-preserving contrast reduction

    Microsoft Academic Search

    Jack Tumblin; Greg Turk

    1999-01-01

    High contrast scenes are difficult to depict on low contrast dis- plays without loss of important fine details and textures. Sk illed artists preserve these details by drawing scene contents in coarse- to-fine order using a hierarchy of scene boundaries and shadings. We build a similar hierarchy using multiple instances of a new low curvature image simplifier (LCIS), a partial

  7. Using the Computerized Scanning and Imaging Facility (C51) at WHOI, scientists can make three-dimensional reconstructions detailing the anatomy of sea turtles. This Kemp's ridley turtle was scanned to help diagnose a lung disease.

    E-print Network

    -dimensional reconstructions detailing the anatomy of sea turtles. This Kemp's ridley turtle was scanned to help diagnose, a team of blast trauma re- searchers, and Navy engineers meticulously attached pressure sensors to fresh the blasts, which are recorded by sensors. Then the researchers dissect the specimens to exam- #12;ine

  8. Sense of place and place identity: review of neuroscientific evidence.

    PubMed

    Lengen, Charis; Kistemann, Thomas

    2012-09-01

    The aim of this review is to bring the phenomenological sense of place approach together with current results from neuroscience. We searched in neuroscientific literature for ten dimensions which were beforehand identified to be important in a phenomenological sense of place/place identity model: behaviour, body, emotion, attention, perception, memory, orientation, spirituality, meaning/value and culture/sociality. Neuroscience has identified many neurobiological correlates of phenomenological observations concerning sense of place. The human brain comprises specific and specialised structures and processes to perceive, memorise, link, assess and use spatial information. Specific parts (hippocampus, entorhinal, parahippocampal and parietal cortex), subregions (parahippocampal place area, lingual landmark area), and cells (place cells, grid cells, border cells, head direction cells) have been identified, their specific function could be understood and their interaction traced. Neuroscience has provided evidence that place constitutes a distinct dimension in neuronal processing. This reinforces the phenomenological argumentation of human geography and environmental psychology. PMID:22440778

  9. Optimal dispersion and central places

    Microsoft Academic Search

    Kevin M. Curtin; Richard L. Church

    2007-01-01

    This paper presents research into optimal dispersion models as applied to central places. The literature regarding location optimization and central places is reviewed and the motivation for employing dispersion models is identified. Models that employ the objective of maximal dispersion in the context of central places are formulated and solved in the context of both single- and multiple-good systems. Two

  10. The Boomerang Nebula - the coolest place in the Universe?

    NASA Astrophysics Data System (ADS)

    2003-02-01

    Boomerang Nebula hi-res Size hi-res: 196 kb Credits: European Space Agency, NASA The Boomerang Nebula - the coolest place in the Universe? The Boomerang Nebula is a young planetary nebula and the coldest object found in the Universe so far. The NASA/ESA Hubble Space Telescope image is yet another example of how Hubble's sharp eye reveals surprising details in celestial objects. This NASA/ESA Hubble Space Telescope image shows a young planetary nebula known (rather curiously) as the Boomerang Nebula. It is in the constellation of Centaurus, 5000 light-years from Earth. Planetary nebulae form around a bright, central star when it expels gas in the last stages of its life. The Boomerang Nebula is one of the Universe's peculiar places. In 1995, using the 15-metre Swedish ESO Submillimetre Telescope in Chile, astronomers revealed that it is the coldest place in the Universe found so far. With a temperature of -272°C, it is only 1 degree warmer than absolute zero (the lowest limit for all temperatures). Even the -270°C background glow from the Big Bang is warmer than this nebula. It is the only object found so far that has a temperature lower than the background radiation. Keith Taylor and Mike Scarrott called it the Boomerang Nebula in 1980 after observing it with a large ground-based telescope in Australia. Unable to see the detail that only Hubble can reveal, the astronomers saw merely a slight asymmetry in the nebula's lobes suggesting a curved shape like a boomerang. The high-resolution Hubble images indicate that 'the Bow tie Nebula' would perhaps have been a better name. The Hubble telescope took this image in 1998. It shows faint arcs and ghostly filaments embedded within the diffuse gas of the nebula's smooth 'bow tie' lobes. The diffuse bow-tie shape of this nebula makes it quite different from other observed planetary nebulae, which normally have lobes that look more like 'bubbles' blown in the gas. However, the Boomerang Nebula is so young that it may not have had time to develop these structures. Why planetary nebulae have so many different shapes is still a mystery. This NASA/ESA Hubble Space Telescope image shows a young planetary nebula known (rather curiously) as the Boomerang Nebula. It is in the constellation of Centaurus, 5000 light-years from Earth. Planetary nebulae form around a bright, central star when it expels gas in the last stages of its life. The Boomerang Nebula is one of the Universe's peculiar places. In 1995, using the 15-metre Swedish ESO Submillimetre Telescope in Chile, astronomers Sahai and Nyman revealed that it is the coldest place in the Universe found so far. With a temperature of -272°C, it is only 1 degree warmer than absolute zero (the lowest limit for all temperatures). Even the -270°C background glow from the Big Bang is warmer than this nebula. It is the only object found so far that has a temperature lower than the background radiation. Keith Taylor and Mike Scarrott called it the Boomerang Nebula in 1980 after observing it with a large ground-based telescope in Australia. Unable to see the detail that only Hubble can reveal, the astronomers saw merely a slight asymmetry in the nebula's lobes suggesting a curved shape like a boomerang. The high-resolution Hubble images indicate that 'the Bow tie Nebula' would perhaps have been a better name. The Hubble telescope took this image in 1998. It shows faint arcs and ghostly filaments embedded within the diffuse gas of the nebula's smooth 'bow tie' lobes. The diffuse bow-tie shape of this nebula makes it quite different from other observed planetary nebulae, which normally have lobes that look more like 'bubbles' blown in the gas. However, the Boomerang Nebula is so young that it may not have had time to develop these structures. Why planetary nebulae have so many different shapes is still a mystery. The general bow-tie shape of the Boomerang appears to have been created by a very fierce 500 000 kilometre-per-hour wind blowing ultracold gas away from the dying central star. The star has been losing as much as one-thousandth of a so

  11. The Place of Ion Beams in Clinical Applications

    NASA Astrophysics Data System (ADS)

    Kim, Paul J.; Shih, Helen A.

    The place of ion beam therapy (IBT) in the clinic has evolved amid a dynamic environment of advancements on several fronts: tumor biology, diagnostic imaging, surgical and medical oncology, and radiotherapy treatment planning and delivery. This chapter will present generalized themes of the current place of IBT and current areas of investigation.

  12. SURFACE RECONSTRUCTION ALGORITHMS FOR DETAILED CLOSE-RANGE OBJECT MODELING

    Microsoft Academic Search

    Fabio Remondino; Li Zhang

    Nowadays 3D modeling is generally performed using image or range data. Range sensors are getting a quite common source of data for modeling purposes due to their speed and ability to capture millions of points. In this paper we report about two surface measurement algorithms for precise and detailed object reconstruction from terrestrial images. Photogrammetry has all the potentialities to

  13. 13. DETAIL VIEW OF BRIDGE, LOOKING SOUTH FROM ROADWAY. DETAIL ...

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

    13. DETAIL VIEW OF BRIDGE, LOOKING SOUTH FROM ROADWAY. DETAIL VIEW OF THE PIERS AND LIGHTING FIXTURES ON THE COLORADO STREET BRIDGE. THIS VIEW SHOWS A PORTION OF THE BRIDGE ALONG THE SOUTH SIDE OF THE ROADWAY. EACH FIXTURE ALSO ORIGINALLY HAD FOUR ADDITIONAL GLOBES, WHICH EXTENDED FROM THE COLUMN BELOW THE MAIN GLOBE. THE 'REFUGE' SEATING AREAS ARE ORIGINAL, WHILE THE RAILING IS A LATER ADDITION. - Colorado Street Bridge, Spanning Arroyo Seco at Colorado Boulevard, Pasadena, Los Angeles County, CA

  14. Color Image Segmentation in a Quaternion Framework.

    PubMed

    Subakan, Ozlem N; Vemuri, Baba C

    2009-01-01

    In this paper, we present a feature/detail preserving color image segmentation framework using Hamiltonian quaternions. First, we introduce a novel Quaternionic Gabor Filter (QGF) which can combine the color channels and the orientations in the image plane. Using the QGFs, we extract the local orientation information in the color images. Second, in order to model this derived orientation information, we propose a continuous mixture of appropriate hypercomplex exponential basis functions. We derive a closed form solution for this continuous mixture model. This analytic solution is in the form of a spatially varying kernel which, when convolved with the signed distance function of an evolving contour (placed in the color image), yields a detail preserving segmentation. PMID:21243101

  15. Novel details of calsequestrin gel conformation in situ.

    PubMed

    Perni, Stefano; Close, Matthew; Franzini-Armstrong, Clara

    2013-10-25

    Calsequestrin (CASQ) is the major component of the sarcoplasmic reticulum (SR) lumen in skeletal and cardiac muscles. This calcium-binding protein localizes to the junctional SR (jSR) cisternae, where it is responsible for the storage of large amounts of Ca(2+), whereas it is usually absent, at least in its polymerized form, in the free SR. The retention of CASQ inside the jSR is due partly to its association with other jSR proteins, such as junctin and triadin, and partly to its ability to polymerize, in a high Ca(2+) environment, into an intricate gel that holds the protein in place. In this work, we shed some light on the still poorly described in situ structure of polymerized CASQ using detailed EM images from thin sections, with and without tilting, and from deep-etched rotary-shadowed replicas. The latter directly illustrate the fundamental network nature of polymerized CASQ, revealing repeated nodal points connecting short segments of the linear polymer. PMID:24025332

  16. Observe One Place at Many Scales

    NSDL National Science Digital Library

    Looking at an object or location at different scales provides the observer with a range of views. Details are visible at a small scale while the overall picture is visible on a larger scale. This interactive feature consists of a series of six images of increasingly smaller scale, allowing viewers to see the effects of changing scales. A background essay and list of discussion questions is also provided.

  17. Color anaglyph stereo scatterplots: construction details

    SciTech Connect

    Carr, D.B.; Littlefield, R.J.

    1983-03-01

    For those that can see stereo, stereo scatterplots provide a powerful method of displaying data that has three-dimensional structure. While not the best quality stereo presentation method, color anglyph stereo is easily produced on raster color devices. This simplicity makes color anaglyph stereo a useful tool for exploratory intractive data analysis. Attention to several details can enhance anaglyph scatterplots. This poster paper addresses issues of perspective projection ambiguity, pixel-rounding noise, crosstalk between images, and the use of additional depth cues including overplotting, and shifts in point size, intensity, and hue.

  18. Color anaglyph stereo scatterplots: Construction details

    NASA Astrophysics Data System (ADS)

    Carr, D. B.; Littlefield, R. J.

    1983-03-01

    For those that can see stereo, stereo scatterplots provide a powerful method of displaying data that has three dimensional structure. While not the best quality stereo presentation method, color anaglyph stereo is easily produced on raster color devices. This simplicity makes color anaglyph stereo a useful tool for exploratory interactive data analysis. Attention to several details can enhance anaglyph scatterplots. Issues of perspective projection ambiguity, pixel-rounding noise, crosstalk between images, and the use of additional depth cues including overplotting, and shifts in point size, intensity, and hue are addressed.

  19. This Corner of Canaan: Curriculum Studies of Place and the Reconstruction of the South

    Microsoft Academic Search

    R. Ugena Whitlock

    2007-01-01

    No region has more distinct images of place than the South. This Corner of Canaan: Curriculum Studies of Place & the Reconstruction of the South makes a unique contribution to studies of curriculum and place, linking the particularities of Southern culture to social concerns of curriculum theory. Written by a Southerner about the South, this book extends curriculum of place

  20. Miniature eye movements enhance fine spatial detail.

    PubMed

    Rucci, Michele; Iovin, Ramon; Poletti, Martina; Santini, Fabrizio

    2007-06-14

    Our eyes are constantly in motion. Even during visual fixation, small eye movements continually jitter the location of gaze. It is known that visual percepts tend to fade when retinal image motion is eliminated in the laboratory. However, it has long been debated whether, during natural viewing, fixational eye movements have functions in addition to preventing the visual scene from fading. In this study, we analysed the influence in humans of fixational eye movements on the discrimination of gratings masked by noise that has a power spectrum similar to that of natural images. Using a new method of retinal image stabilization, we selectively eliminated the motion of the retinal image that normally occurs during the intersaccadic intervals of visual fixation. Here we show that fixational eye movements improve discrimination of high spatial frequency stimuli, but not of low spatial frequency stimuli. This improvement originates from the temporal modulations introduced by fixational eye movements in the visual input to the retina, which emphasize the high spatial frequency harmonics of the stimulus. In a natural visual world dominated by low spatial frequencies, fixational eye movements appear to constitute an effective sampling strategy by which the visual system enhances the processing of spatial detail. PMID:17568745

  1. Optimal dispersion and central places

    Microsoft Academic Search

    Kevin M. Curtin; Richard L. Church

    2007-01-01

    This paper presents research into optimal dispersion models as applied to central places. The literature regarding location\\u000a optimization and central places is reviewed and the motivation for employing dispersion models is identified. Models that\\u000a employ the objective of maximal dispersion in the context of central places are formulated and solved in the context of both\\u000a single- and multiple-good systems. Two

  2. Places and Processes: Physical Processes in Shaping Places

    NSDL National Science Digital Library

    2001-01-01

    In this lesson, students analyze the roles of climate, tectonic and other physical processes in shaping places by selecting two states and explaining the processes that may have shaped their current environments. Although it focuses on places in the United States, this lesson can easily be adapted to other regions of the world.

  3. Privileged Girls: The Place of Femininity and Femininity in Place

    ERIC Educational Resources Information Center

    Fahey, Johannah

    2014-01-01

    Constructions of femininity and attendant notions of feminism are being produced in different ways in different places around the world. This is a complicated global process that cannot be reduced to analyses that take place in nation states. This paper seeks to respond to and enhance Angela McRobbie's compelling argument about understandings…

  4. Cardiac Imaging System

    NASA Technical Reports Server (NTRS)

    1990-01-01

    Although not available to all patients with narrowed arteries, balloon angioplasty has expanded dramatically since its introduction with an estimated further growth to 562,000 procedures in the U.S. alone by 1992. Growth has fueled demand for higher quality imaging systems that allow the cardiologist to be more accurate and increase the chances of a successful procedure. A major advance is the Digital Cardiac Imaging (DCI) System designed by Philips Medical Systems International, Best, The Netherlands and marketed in the U.S. by Philips Medical Systems North America Company. The key benefit is significantly improved real-time imaging and the ability to employ image enhancement techniques to bring out added details. Using a cordless control unit, the cardiologist can manipulate images to make immediate assessment, compare live x-ray and roadmap images by placing them side-by-side on monitor screens, or compare pre-procedure and post procedure conditions. The Philips DCI improves the cardiologist's precision by expanding the information available to him.

  5. Exterior oblique detail view of sidewalk entry at north side ...

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

    Exterior oblique detail view of sidewalk entry at north side of Building 3 from Bay Street sidewalk, looking southeast (with original steps revised to accommodate handicap ramp) - North Beach Place, 475 Bay Street, 475 Bay Street, San Francisco, San Francisco County, CA

  6. 16. STRUCTURAL DETAILS: CHANNEL, BIT & CLEAT, ANCHOR BOLTS & ...

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

    16. STRUCTURAL DETAILS: CHANNEL, BIT & CLEAT, ANCHOR BOLTS & PLATES FOR PIERS 4, 5, AND 6, DWG. NO. 97, 1-1/2" = 1', MADE BY A.F., JUNE 13, 1908 - Baltimore Inner Harbor, Pier 5, South of Pratt Street between Market Place & Concord Street, Baltimore, Independent City, MD

  7. 22. Detail view of sign suspended from portal strut (this ...

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

    22. Detail view of sign suspended from portal strut (this sign was located at the same place at both ends of Moody Bridge). Bottom: General elevation view to southeast showing northern abutment with solid rock foundation. - Moody Bridge, Spanning South Fork Eel River, Garberville, Humboldt County, CA

  8. 16. DETAIL OF END OF SWING SPAN (LEFT) AND SOUTH ...

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

    16. DETAIL OF END OF SWING SPAN (LEFT) AND SOUTH END OF NORTH STATIONARY SPAN REVEALING IRON SKID AND SWING BALANCE SUPPORT WHEEL. NOTE CHAIN USED TO HOLD BRIDGE IN PLACE - Maurice River Pratt Through-Truss Swing Bridge, Spanning Maurice River, Mauricetown, Cumberland County, NJ

  9. 35. Photocopy of detail of ink and wash rendering by ...

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

    35. Photocopy of detail of ink and wash rendering by N. G. Starkwether in collection of Mr. & Mrs. Richard T. Pratt, Camden ELEVATIONS OF ITALIAN VILLA FOR WILLIAM C. PRATT - CAMDEN PLACE - RIVER FRONT - Camden, Rappahannock River, Port Royal, Caroline County, VA

  10. 36. Photocopy of detail of ink and wash rendering by ...

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

    36. Photocopy of detail of ink and wash rendering by N. G. Starkwether in collection of Mr. & Mrs. Richard T. Pratt, Camden ELEVATIONS OF ITALIAN VILLA FOR WILLIAM C. PRATT - CAMDEN PLACE - DRIVE FRONT - Camden, Rappahannock River, Port Royal, Caroline County, VA

  11. 19. DETAIL OF INTERIOR WALL CONSTRUCTION, VIEW TOWARD SOUTH, THIRD ...

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

    19. DETAIL OF INTERIOR WALL CONSTRUCTION, VIEW TOWARD SOUTH, THIRD BAY Showing asphalt felt applied to both sides of interior wall studs beneath wood cladding. Back-nailing of felt indicates sequence of felt and cladding installation. - U.S. Military Academy, Ice House, Mills Road at Howze Place, West Point, Orange County, NY

  12. 18. Construction technique, detail, bridges along elevated right ofway of ...

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

    18. Construction technique, detail, bridges along elevated right- of-way of Shaker Rapid Transit through east side city of Cleveland. 'Showing use of Pyrobar to decrease load of bridge (East 81st Street); the Pyrobar is shown placed on wet concrete. Workmen at left are finishing laying concrete over pyrobar.' 1915 - Shaker Heights Rapid Transit Line, Cleveland, Cuyahoga County, OH

  13. 8. Detail, 1897 Sanborn Fire Insurance Map, Carlin, Nevada, in ...

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

    8. Detail, 1897 Sanborn Fire Insurance Map, Carlin, Nevada, in collection of Nevada Historical Society, Reno; credit Nevada Historical Society. Former Library in Engine Stores Building is now vacant Oil House is now in place, shown as corrugated iron cladding on frame. - Southern Pacific Railroad, Carlin Shops, Foot of Sixth Street, Carlin, Elko County, NV

  14. Detailed balance: lifetimes and efficiencies

    NASA Astrophysics Data System (ADS)

    Queisser, Hans J.

    2007-09-01

    Lifetimes of minority carriers in semiconductors are very important parameters for devices, especially for solar cells. For germanium and silicon, it was discovered that the actually measured lifetimes were by orders of magnitude smaller than the theoretical limit, which can be deduced from the principle of detailed balance of black-body radiative absorption and emission. The thermodynamic limit of solar cell efficiency was also derived based on this principle. The development of solar cells with silicon and its non-ideal junction behavior are reviewed. The contemporary suggested trends to overcome this detailed balance limit are being discussed.

  15. NOSS Altimeter Detailed Algorithm specifications

    NASA Technical Reports Server (NTRS)

    Hancock, D. W.; Mcmillan, J. D.

    1982-01-01

    The details of the algorithms and data sets required for satellite radar altimeter data processing are documented in a form suitable for (1) development of the benchmark software and (2) coding the operational software. The algorithms reported in detail are those established for altimeter processing. The algorithms which required some additional development before documenting for production were only scoped. The algorithms are divided into two levels of processing. The first level converts the data to engineering units and applies corrections for instrument variations. The second level provides geophysical measurements derived from altimeter parameters for oceanographic users.

  16. Mark A. Burgman Personal Details

    E-print Network

    Burgman, Mark

    1 Resume Mark A. Burgman Personal Details Address: School of Botany The University of Melbourne of Botany, University of Melbourne. 2002 ­ present Professor, School of Botany, University of Melbourne Professor and Reader, School of Botany, University of Melbourne. 1995 ­ 1999 Coordinator of Environmental

  17. Detailed balance: lifetimes and efficiencies

    Microsoft Academic Search

    Hans J. Queisser

    2007-01-01

    Lifetimes of minority carriers in semiconductors are very important parameters for devices, especially for solar cells. For germanium and silicon, it was discovered that the actually measured lifetimes were by orders of magnitude smaller than the theoretical limit, which can be deduced from the principle of detailed balance of black-body radiative absorption and emission. The thermodynamic limit of solar cell

  18. Seductive Details in Multimedia Messages

    ERIC Educational Resources Information Center

    Rey, Gunter Daniel

    2011-01-01

    The seductive detail principle asserts that people learn more deeply from a multimedia presentation when interesting but irrelevant adjuncts are excluded rather than included. However, critics could argue that studies about this principle contain methodological problems. The recent experiment attempts to overcome these problems. Students (N = 108)…

  19. Detail Drawings: Communicating with Engineers

    NSDL National Science Digital Library

    2014-09-18

    Students are introduced to detail drawings and the importance of clearly documenting and communicating their designs. They are introduced to the American National Standards Institute (ANSI) Y14.5 standard, which controls how engineers communicate and archive design information. They are introduced to standard paper sizes and drawing view conventions, which are major components of the Y14.5 standard.

  20. PLACES : experiencing and making a place in Athens

    E-print Network

    Gryboyianni, Christina

    1987-01-01

    PLACE is a concept that addresses fundamental aspects of human existence; the external bonds of man with the world. It rests upon shared ways of life and knowledge which enable its physical expression into coherent and ...

  1. SHELTER IN PLACE What conditions may warrant sheltering in place?

    E-print Network

    Fernandez, Eduardo

    bathroom. What should I do to safely shelter in place? · In general: o GO inside as quickly as possible. · Establish a "Buddy" system to help those in need. What should I know in order to help individuals requiring

  2. City/Place Population Estimates

    NSDL National Science Digital Library

    1997-01-01

    The US Census Bureau has released updated population estimates for cities, places, and minor civil divisions in the US. Seven major sections list cities over 100,000 and 10,000 by rank and percent growth, as well as cities, places, and minor civil divisions. The latter three sections contain figures from 1990-1996; these are arranged by state and they are also available as aggregated .zip files. Documentation and file layout are available. This City/Place information is part of a larger Census population site that covers national, state, and metropolitan area estimates (discussed in the April 25, 1997 Scout Report).

  3. Study of the detail content of Apollo orbital photography

    NASA Technical Reports Server (NTRS)

    Kinzly, R. E.

    1974-01-01

    The development and application of image evaluation methods for assessing the detail content of Apollo orbital photography was demonstrated. Edge analysis using shadow to sunlight edges interior to craters was successfully used to evaluate the fine detail content of Apollo 15, 16, and 17 imagery. A method for evaluating tone quality was developed using a gain factor as a function of object contrast and average exposure level that can be related to object detectability.

  4. There's No Place Like Home

    MedlinePLUS

    ... Navigation Bar Home Current Issue Past Issues Feature: Senior Living There's No Place Like Home Past Issues / ... state offices on aging; social services organizations; nearby senior centers; and civic, tribal, and religious organizations. They ...

  5. E. 4TH PLACEE. 4TH PLACE E. 5TH PLACE

    E-print Network

    Reynolds, Albert C.

    ® #12;E. 4TH PLACEE. 4TH PLACE E. 5TH PLACE E. 8TH STREETE. 8TH STREET E. 5TH STREET TUCKERDRIVE TUCKERDRIVE S.FLORENCE S.GARY S.GARYPLACE E. 4TH STREET 2 1 8 10 52 47 13 16 53 17 4649 48 18 56 21 59 80 24 26 25 90 27 63 65 83 36 38 92 41 78 28 45 51 76 40 20 44 64575455 82 6 62 11 34 91 87 I-244 E. 11TH

  6. E. 4TH PLACEE. 4TH PLACE E. 5TH PLACE

    E-print Network

    Reynolds, Albert C.

    E. 4TH PLACEE. 4TH PLACE E. 5TH PLACE E. 8TH STREETE. 8TH STREET E. 5TH STREET TUCKERDRIVE TUCKERDRIVE S.FLORENCE S.GARY S.GARYPLACE E. 4TH STREET 2 1 8 10 52 47 13 16 53 17 4649 48 18 56 21 59 80 24 26 25 90 27 63 65 83 36 38 92 41 78 28 45 51 76 40 20 44 64575455 82 6 62 11 34 91 87 I-244 E. 11TH

  7. A novel approach for detail-enhanced exposure fusion using guided filter.

    PubMed

    Singh, Harbinder; Kumar, Vinay; Bhooshan, Sunil

    2014-01-01

    In this paper we propose a novel detail-enhancing exposure fusion approach using nonlinear translation-variant filter (NTF). With the captured Standard Dynamic Range (SDR) images under different exposure settings, first the fine details are extracted based on guided filter. Next, the base layers (i.e., images obtained from NTF) across all input images are fused using multiresolution pyramid. Exposure, contrast, and saturation measures are considered to generate a mask that guides the fusion process of the base layers. Finally, the fused base layer is combined with the extracted fine details to obtain detail-enhanced fused image. The goal is to preserve details in both very dark and extremely bright regions without High Dynamic Range Image (HDRI) representation and tone mapping step. Moreover, we have demonstrated that the proposed method is also suitable for the multifocus image fusion without introducing artifacts. PMID:24683353

  8. Optomechanical details in injection-molded assemblies

    NASA Astrophysics Data System (ADS)

    Hebert, Raymond T.

    1995-12-01

    With the advent of low-cost electro-optic components such as LEDs, laser diodes and CCD imaging devices, the cost and performance demands now fall upon the optical subsystems in order to achieve realistic marketing targets for many emerging commercial and consumer products. One of the many benefits of injection-molded plastic optics is the diversity of features that are available to the design team. Once designed and incorporated into the tooling, many features are virtually free in high-volume production. These features can include mechanical details as well as optical functions. Registration features can be included for precisely positioning optical elements to one another or to other assemblies such as printed circuit boards or housings. Snaps, compression features, spring-loading elements, standoffs, self-tapping screws or ultrasonically weldable features can greatly facilitate ease of assembly.

  9. E. 4TH PLACE E. 5TH PLACE

    E-print Network

    Reynolds, Albert C.

    E. 4TH PLACE E. 5TH PLACE E. 5TH STREET TUCKERDRIVE S.FLORENCE S.GARY E. 4TH STREET 2 1 8 10 52 47 82 6 62 11 34 91 87 I-244 E. 11TH STREET S.HARVARD E. 3RD STREET E. 4TH STREET S.COLUMBIA 23 68 S & College North Lot BLUE ROUTE 14 Lorton Village Lot 30 39 43 61 71 33 29 31 37 32 15 LPC Lot 72 19 E. 6TH

  10. "Influence Method". Detailed mathematical description

    NASA Astrophysics Data System (ADS)

    Rios, I. J.; Mayer, R. E.

    2015-07-01

    A new method for the absolute determination of nuclear particle flux in the absence of known detector efficiency, the "Influence Method", was recently published (I.J. Rios and R.E. Mayer, Nuclear Instruments & Methods in Physics Research A 775 (2015) 99-104). The method defines an estimator for the population and another estimator for the efficiency. In this article we present a detailed mathematical description which yields the conditions for its application, the probability distributions of the estimators and their characteristic parameters. An analysis of the different cases leads to expressions of the estimators and their uncertainties.

  11. Detailed mechanism of benzene oxidation

    NASA Technical Reports Server (NTRS)

    Bittker, David A.

    1987-01-01

    A detailed quantitative mechanism for the oxidation of benzene in both argon and nitrogen diluted systems is presented. Computed ignition delay time for argon diluted mixtures are in satisfactory agreement with experimental results for a wide range of initial conditions. An experimental temperature versus time profile for a nitrogen diluted oxidation was accurately matched and several concentration profiles were matched qualitatively. Application of sensitivity analysis has given approximate rate constant expressions for the two dominant heat release reactions, the oxidation of C6H5 and C5H5 radicals by molecular oxygen.

  12. Reading Place: Learning from the Savage Inequalities at Erasmus Hall

    ERIC Educational Resources Information Center

    Dickar, Maryann

    2006-01-01

    Through his detailed descriptions of schools across America, Kozol (1991) demonstrated the symbolic impact of the physical space of schools with disturbing examples of institutionalized racism made visible. Thus, Savage Inequalities also initiated a critical pedagogy of place by questioning the relationship of racial identity to the quality and…

  13. Image Mining: Trends and Developments

    Microsoft Academic Search

    Wynne Hsu; Mong Li Lee; Ji Zhang

    2002-01-01

    Advances in image acquisition and storage technology have led to tremendous growth in very large and detailed image databases. These images, if analyzed, can reveal useful information to the human users. Image mining deals with the extraction of implicit knowledge, image data relationship, or other patterns not explicitly stored in the images. Image mining is more than just an extension

  14. Auction game in electric power market place

    SciTech Connect

    Kumar, J.; Sheble, G. [Iowa State Univ., Ames, IA (United States). Dept. of Electrical and Computer Engineering

    1996-11-01

    The power industry in the US is presently an evolving changing business environment. While planning to meet future peak demand is still a concern, the efficient utilization of existing generation and transmission resources is fast becoming a primary interest. This interest suggests a move from cost-based market operations to price based market operations. Auction market structure is one of the various ways to perform price based operation. Such a market place would be very new and challenging to all players of the electric power industry. This paper describes an overview of the new business environment. The paper presents a detailed description of the auction game. The trading objectives in the bidding game are defined. The framework of auction process is described by defining the rules to play the game. Finally, strategies for market players are discussed.

  15. Detail of north side of Test Stand 'A' base, showing ...

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

    Detail of north side of Test Stand 'A' base, showing tanks for distilled water (left), fuel (center), and gaseous nitrogen (right). Other tanks present for tests were removed before this image was taken. - Jet Propulsion Laboratory Edwards Facility, Test Stand A, Edwards Air Force Base, Boron, Kern County, CA

  16. 4. Credit BG. Detail view of pair of Clayton steam ...

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

    4. Credit BG. Detail view of pair of Clayton steam generators. Left part of image shows front, right part shows back. Generators were removed from 4280/E-81 for shipment to a new owner. - Jet Propulsion Laboratory Edwards Facility, Test Stand D, Steam Generator Plant, Edwards Air Force Base, Boron, Kern County, CA

  17. Program calculates oil in place

    SciTech Connect

    Boone, D.M

    1989-04-01

    This article describes a program that calculates the oil-in-place through volumetric methods and is the fifth of a series of articles describing engineering tool kit programs to assist the petroleum engineer. This program, as are the others in the series, is written to run within Lotus 1-2-3 spreadsheet software.

  18. Integrating Time, Place, and Play

    ERIC Educational Resources Information Center

    Gallavan, Nancy P.

    2004-01-01

    "Time, Place, and Play," is a short phrase, but is summarizes three very big concepts--history, geography, and culture--that are part of the elementary social studies curriculum. This article relates the story of how twenty-five elementary and middle school teachers, meeting over several weeks in a university class, designed a unit of study on the…

  19. Central places in a square

    Microsoft Academic Search

    Dimitrios S. Dendrinos

    1995-01-01

    Revisiting Hotelling and Central Place Theory in a bounded square surface seems to still be quite insightful and productive. In this short note, it is shown that agglomeration at the center occurs under market conditions involving duopolistic competition, as expected. In an optimum framework, a hierarchy of centers emerges in a number of ways qualitatively different from the classical Central

  20. Meditations on Place and Spirit

    E-print Network

    Schlegel, Lisa

    2011-05-31

    scared to be outside alone even if for days at a time. I need to understand my place. Land, once prevalent in humanity’s daily life, is almost completely absent from mine. In my search to understand my captivation with the wild lands of central...

  1. Let's Sleep at Your Place

    E-print Network

    Hacker, Randi

    2010-05-19

    Broadcast Transcript: Sure, Mongolia still has its yurts, its nomads, its fermented yak's milk but it also has a reality TV show: ?????? ????? which means Let's Sleep at Your Place. The host is Tengis, a friendly and sincere young man in glasses...

  2. Putting molecules in their place

    PubMed Central

    Cinquin, Bertrand P.; Do, Myan; McDermott, Gerry; Walters, Alison D.; Myllys, Markko; Smith, Elizabeth A.; Cohen-Fix, Orna; Le Gros, Mark A.; Larabell, Carolyn A.

    2013-01-01

    Each class of microscope is limited to imaging specific aspects of cell structure and/or molecular organization. However, imaging the specimen by complementary microscopies and correlating the data can overcome this limitation. Whilst not a new approach, the field of correlative imaging is currently benefitting from the emergence of new microscope techniques. Here we describe the correlation of cryogenic fluorescence tomography (CFT) with soft x-ray tomography (SXT). This amalgamation of techniques integrates 3-D molecular localization data (CFT) with a high-resolution, 3-D cell reconstruction of the cell (SXT). Cells are imaged in both modalities in a near-native, cryopreserved state. Here we describe the current state of the art in correlative CFT-SXT, and discuss the future outlook for this method. PMID:23966233

  3. Introduction: Development's story in time and place.

    PubMed

    Schiff, Brian

    2014-09-01

    In this introductory chapter, I place Bertram J. Cohler's () seminal essay Personal Narrative and Life Course in the context of the history of narrative psychology and developmental theory. I describe four theses from Personal Narrative and Life Course, which impacted developmental theory and research: (a) the self is a narrative project, (b) developmental periods have a distinct narrative character, (c) narratives are always told in (personal and historical) time, and (d) persons strive for coherence. I briefly describe the chapters to follow. However, my main goal is to argue for the implications of narrative for developmental science. Following Cohler, I argue that narrative has a central role to play in understanding human lives and can provide substantial benefit to developmental theory and research. A narrative perspective allows for a complex and nuanced description of developmental phenomena that accounts for the subjective and unpredictable nature of human lives. The narrative interpretation of experience is a primary human activity that alters the meaning of experience and potentially sets development on a new course, rendering the prediction of developmental outcomes a difficult venture. The narrative perspective provides detailed insights into how development unfolds, how persons actually interpret and reinterpret life in time and place, and can help psychologists to engage fundamental questions about the meaning of experience. PMID:25251506

  4. 25. DETAIL: South wall near west gate, showing the interior ...

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

    25. DETAIL: South wall near west gate, showing the interior of a crib, looking south toward the rear crib wall. Note the plank inserted between the large timbers. These shims (or caulking) were evidently put in place during a repair, or during the rebuilding, and occured frequently in the crib structure. - Wabash & Erie Canal, Lock No. 2, 8 miles east of Fort Wayne, adjacent to U.S. Route 24, New Haven, Allen County, IN

  5. The fine details of evolution.

    PubMed

    Laskowski, Roman A; Thornton, Janet M; Sternberg, Michael J E

    2009-08-01

    Charles Darwin's theory of evolution was based on studies of biology at the species level. In the time since his death, studies at the molecular level have confirmed his ideas about the kinship of all life on Earth and have provided a wealth of detail about the evolutionary relationships between different species and a deeper understanding of the finer workings of natural selection. We now have a wealth of data, including the genome sequences of a wide range of organisms, an even larger number of protein sequences, a significant knowledge of the three-dimensional structures of proteins, DNA and other biological molecules, and a huge body of information about the operation of these molecules as systems in the molecular machinery of all living things. This issue of Biochemical Society Transactions contains papers from oral presentations given at a Biochemical Society Focused Meeting to commemorate the 200th Anniversary of Charles Darwin's birth, held on 26-27 January 2009 at the Wellcome Trust Conference Centre, Cambridge. The talks reported on some of the insights into evolution which have been obtained from the study of protein sequences, structures and systems. PMID:19614583

  6. Why pictures look right when viewed from the wrong place

    E-print Network

    Banks, Marty

    Why pictures look right when viewed from the wrong place Dhanraj Vishwanath1, Ahna R Girshick1 & Martin S Banks1,2 A picture viewed from its center of projection generates the same retinal image as the original scene, so the viewer perceives the scene correctly. When a picture is viewed from other locations

  7. The Finer Details: Climate Modeling

    NASA Technical Reports Server (NTRS)

    2000-01-01

    If you want to know whether you will need sunscreen or an umbrella for tomorrow's picnic, you can simply read the local weather report. However, if you are calculating the impact of gas combustion on global temperatures, or anticipating next year's rainfall levels to set water conservation policy, you must conduct a more comprehensive investigation. Such complex matters require long-range modeling techniques that predict broad trends in climate development rather than day-to-day details. Climate models are built from equations that calculate the progression of weather-related conditions over time. Based on the laws of physics, climate model equations have been developed to predict a number of environmental factors, for example: 1. Amount of solar radiation that hits the Earth. 2. Varying proportions of gases that make up the air. 3. Temperature at the Earth's surface. 4. Circulation of ocean and wind currents. 5. Development of cloud cover. Numerical modeling of the climate can improve our understanding of both the past and, the future. A model can confirm the accuracy of environmental measurements taken. in, the past and can even fill in gaps in those records. In addition, by quantifying the relationship between different aspects of climate, scientists can estimate how a future change in one aspect may alter the rest of the world. For example, could an increase in the temperature of the Pacific Ocean somehow set off a drought on the other side of the world? A computer simulation could lead to an answer for this and other questions. Quantifying the chaotic, nonlinear activities that shape our climate is no easy matter. You cannot run these simulations on your desktop computer and expect results by the time you have finished checking your morning e-mail. Efficient and accurate climate modeling requires powerful computers that can process billions of mathematical calculations in a single second. The NCCS exists to provide this degree of vast computing capability.

  8. Detailed Seismic Reflection Images of the Central American Volcanic Arc

    Microsoft Academic Search

    K. D. McIntosh; C. S. Fulthorpe

    2005-01-01

    New high-resolution seismic reflection profiles across the Central American volcanic arc (CAVA) reveal an asymmetric deformation pattern with large-scale folding and uplift of basinal strata in the forearc contrasted by intrusive bodies, normal faults, and possible strikes-slip faults in the backarc. Since Miocene times the CAVA has migrated seaward, apparently impinging on the Sandino forearc basin and creating or modifying

  9. Detailed Human Shape and Pose from Images Alexandru O. Balan

    E-print Network

    Black, Michael J.

    2001. · Inducted in Omicron Delta Upsilon Economics Honor Society, Lafayette College, spring 2002 of articulated human motion. International Journal of Computer Vision, volume 87, number 1­2, pages 4­27, March in computer science and a joint B.A. degree in mathematics and economics. He went on for his Ph.D. studies

  10. Sense of place in the practice and assessment of place-based science teaching

    Microsoft Academic Search

    Steven Semken; Carol Butler Freeman

    2008-01-01

    We teach earth, ecological, and environmental sciences in and about places imbuedwithmeaningbyhumanexperience.Scientificunderstandingisbutoneofthemany types of meanings that can accrue to a given place. People develop emotional attachments to meaningful places. The sense of place, encompassing the meanings and attachments that places hold for people, has been well characterized in environmental psychology. Its components, place attachment and place meaning, can be measured

  11. Cornice Detail of Rake, Cornice Detail of Eave, Wood DoubleHung ...

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

    Cornice Detail of Rake, Cornice Detail of Eave, Wood Double-Hung Window Details, Wood Door Details - Boxley Grist Mill, Boxley vicinity on State Route 43, Buffalo National River, Ponca, Newton County, AR

  12. Inbetween place: the emergence of the essence 

    E-print Network

    Laiprakobsup, Narongpon

    2009-05-15

    , inbetween places, based on embodied presence, can be defined as distinct body of junctions by organized complexity of edges. According to Langer’s term “Significant Form” of place, inbetween places convey the symbolic presence of associative, edging layers...

  13. Mapping Indigenous Depth of Place

    ERIC Educational Resources Information Center

    Pearce, Margaret Wickens; Louis, Renee Pualani

    2008-01-01

    Indigenous communities have successfully used Western geospatial technologies (GT) (for example, digital maps, satellite images, geographic information systems (GIS), and global positioning systems (GPS)) since the 1970s to protect tribal resources, document territorial sovereignty, create tribal utility databases, and manage watersheds. The use…

  14. An anthropologist in unexpected places

    PubMed Central

    Knutsen, Johan Henrik

    2014-01-01

    Much contemporary anthropology has turned away from exclusive focus on so-called “primitive” tribes in far-away places. The study of urban people has become more prominent, and some researchers have also turned their gaze towards marginalized minorities in their communities. Philippe Bourgois is an example of this. He is well known for studying crack dealers in East Harlem, New York ( In Search of Respect) and homeless heroin addicts in San Francisco (Righteous Dopefiend). Kula Kula was lucky enough to catch him in his office, and had a chat via skype. PMID:25436019

  15. Simulation of imaging and refocusing for light field photography

    NASA Astrophysics Data System (ADS)

    Huang, Han; Li, Xiaotong; Cen, Zhaofeng

    2013-12-01

    The entire process of image formation and refocusing of light field photography with microlens array is simulated using the in-house software OTS based on real ray tracing. The optical system consists of a photographic lens and the microlens array which are specifically designed. Objects are placed in different distance before the lens, and images of them on the detector plane are got by imaging simulation algorithm. Utilizing the color, intensity and the corresponding direction information of light rays on the image plane, pictures focusing at different depth in the image space are calculated, so that we can refocus at different objects in different distance. The paper also details the basic requirement of optical system and this simulation process is a fundamental work of research on design method and performance of lens using in light field photography.

  16. Detail view of the interior of the flight deck looking ...

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

    Detail view of the interior of the flight deck looking forward showing the overhead control panels. Note that the flight deck windows have protective covers over them in this view. This images can be digitally stitched with image HAER No. TX-116-A-19 to expand the view to include the Commander and Pilot positions during ascent and reentry and landing. This view was taken in the Orbiter Processing Facility at the Kennedy Space Center. - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

  17. Three-dimensional place and route for FPGAs

    Microsoft Academic Search

    Cristinel Ababei; Hushrav Mogal; Kia Bazargan

    2006-01-01

    We present timing-driven partitioning and simulated-annealing (SA)-based placement algorithms together with a detailed routing tool for three-dimensional (3-D) field-programmable gate array (FPGA) integration. The circuit is first divided into layers with a limited number of interlayer vias, and then placed on individual layers, while minimizing the delay of critical paths. We use our tool as a platform to explore the

  18. Three-dimensional place and route for FPGAs

    Microsoft Academic Search

    Cristinel Ababei; Hushrav Mogal; Kia Bazargan

    2005-01-01

    We present timing-driven partitioning and simulated annealing based placement algorithms together with a detailed routing tool for 3D FPGA integration. The circuit is first divided into layers with limited number of inter-layer vias, and then placed on individual layers, while minimizing the delay of critical paths. We use our tool as a platform to explore the potential benefits in terms

  19. Detail view of the port side of the payload bay ...

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

    Detail view of the port side of the payload bay of the Orbiter Discovery. This view shows Remote Manipulator System, Canadarm, sensors in the center of the image and a close-up view of a small segment of the orbiter's radiator panel. This photograph was taken in the Orbiter Processing Facility at the Kennedy Space Center. - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

  20. Microwave Imaging of Cotton Bales

    PubMed Central

    Pelletier, Mathew G.; Barnes, Edward M.

    2008-01-01

    Modern moisture restoration systems are increasingly capable of adding water to cotton bales. However, research has identified large variations in internal moisture within bales that are not readily monitored by current systems. While microwave moisture sensing systems can measure average bale moisture, this can be deceptive where water is unevenly distributed. In some cases, localized internal moisture levels exceed 7.5%, the upper safe limit for cotton bale storage, as determined by the USDA, as above this level, bales degrade and lose value. A high proportion of stored bales containing excess moisture have been discovered throughout the US in increasing numbers over the past several seasons, making the detection and prevention of this occurrence a critical goal. Previous research by the authors resulted in the development of microwave moisture-sensing technology. The current study examines an extension to this technology to allow for detailed cotton bale moisture imaging. The new technique incorporates a narrow beam imaging antenna coupled to a tomographic imaging algorithm. The imaging technique was able to resolve small (< 1 cm) high-permittivity structures against a low permittivity background. Moreover, the system was able to identify structures of known permittivity with high accuracy (coefficient of determination (r2) > 0.99). In preliminary testing on a wet commercial UD bale, the technique was able to accurately image and resolve the location of the pre-placed internal wet layer.

  1. Radar Image, Hokkaido, Japan

    NASA Technical Reports Server (NTRS)

    2000-01-01

    The southeast part of the island of Hokkaido, Japan, is an area dominated by volcanoes and volcanic caldera. The active Usu Volcano is at the lower right edge of the circular Lake Toya-Ko and near the center of the image. The prominent cone above and to the left of the lake is Yotei Volcano with its summit crater. The city of Sapporo lies at the base of the mountains at the top of the image and the town of Yoichi -- the hometown of SRTM astronaut Mamoru Mohri -- is at the upper left edge. The bay of Uchiura-Wan takes up the lower center of the image. In this image, color represents elevation, from blue at the lowest elevations to white at the highest. The radar image has been overlaid to provide more details of the terrain. Due to a processing problem, an island in the center of this crater lake is missing and will be properly placed when further SRTM swaths are processed. The horizontal banding in this image is a processing artifact that will be removed when the navigation information collected by SRTM is fully calibrated. This image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on February 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. SRTM was designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between the National Aeronautics and Space Administration (NASA), the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense (DoD), and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Earth Science Enterprise, Washington, DC. Size: 100 by 150 kilometers (62 by 93 miles) Location: 42.5 deg. North lat., 140.3 deg. East lon. Orientation: North towards upper left Image Data: SRTM Original Data Resolution: SRTM 30 meters (99 feet) Date Acquired: February 17, 2000

  2. Detailed Globes Enhance Education and Recreation

    NASA Technical Reports Server (NTRS)

    2007-01-01

    Orbis World Globes creates inflatable globes-Earthballs-in many sizes that depict Earth as it is seen from space, complete with atmospheric cloud cover. Orbis designs and produces the most visually authentic replicas of Earth ever created, and NASA took notice of Orbis globes and employed a 16-inch diameter EarthBall for an educational film it made aboard the STS-45 shuttle mission. Orbis later collaborated with NASA to create two 16-foot diameter world globes for display at the 2002 Olympic Winter Games in Salt Lake City, using more detailed satellite imagery. The satellite image now printed on all Orbis globes displays 1-kilometer resolution and is 21,600 by 43,200 pixels in size, and Orbis globes are otherwise meteorologically accurate, though the cloud cover has been slightly reduced in order for most of the landforms to be visible. Orbis also developed the exclusive NightGlow Cities feature, enabling EarthBalls to display the world's cities as they appear as the Earth revolves from daylight into night. Orbis inflatable globes are available in sizes from 1 to 100 feet in diameter, with the most common being the standard 16-inch and 1-meter diameter EarthBalls. Applications include educational uses from preschools to universities, games, and for a variety of display purposes at conferences, trade shows, festivals, concerts, and parades. A 16-foot diameter Orbis globe was exhibited at the United Nations' World Urban Forum, in Vancouver, Canada; the Space 2006 conference, in San Jose, California; and the X-Prize Cup Personal Spaceflight Exposition in Las Cruces, New Mexico.

  3. Melatonin: new places in therapy.

    PubMed

    Maharaj, Deepa S; Glass, Beverley D; Daya, Santy

    2007-12-01

    The fact that the full extent of the function of the pineal gland has not yet been elucidated, has stimulated melatonin research worldwide. This review introduces melatonin's mechanism of action, direct and indirect antioxidant actions as well as the antioxidant properties of its metabolites, 6-hydroxymelatonin (6-OHM) and N-acetyl-N-formyl-5-methoxykynurenamine (AFMK). At present the mechanism of action is proposed to be receptor-, protein- and nonprotein-mediated. From its popular role in the treatment of jetlag, melatonin is now implicated in the reduction of oxidative stess, both as a free radical scavenger and antioxidant. Melatonin's direct scavenging action in respect of the following will be discussed: superoxide anions, hydrogen peroxide, hydroxyl radicals, singlet oxygen, peroxy radicals and nitric oxide/peroxy nitrite anions. In addition melatonin also possesses indirect antioxidant activity and the role of its metabolites, AFMK and 6-OHM will be presented. It is these free radical scavenging and antioxidant properties of melatonin that has shifted the focus from that of merely strengthening circadian rhythms to that of neuroprotectant: a new place in therapy. PMID:17828452

  4. Detail view of the flight deck looking aft. The aft ...

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

    Detail view of the flight deck looking aft. The aft viewing windows are uncovered in this view and look out towards the payload bay. The overhead viewing windows have exterior covers in place in this view. The aft flight deck contains displays and controls for executing maneuvers for rendezvous, docking, payload deployment and retrieval, payload monitoring and the remote manipulator arm controls. Payload bay doors are also operated from this location. This view was taken in the Orbiter Processing Facility at the Kennedy Space Center. - Space Transportation System, Orbiter Discovery (OV-103), Lyndon B. Johnson Space Center, 2101 NASA Parkway, Houston, Harris County, TX

  5. Photoacoustic Imaging

    PubMed Central

    Zhang, Yin; Hong, Hao; Cai, Weibo

    2014-01-01

    Photoacoustic imaging, based on the photoacoustic effect, has come a long way over the last decade. Possessing many attractive characteristics such as the use of non-ionizing electromagnetic waves, good resolution/contrast, portable instrumention, as well as the ability to quantitate the signal to a certain extent, photoacoustic techniques have been applied for the imaging of cancer, wound healing, disorders in the brain, gene expression, among others. As a promising structural, functional and molecular imaging modality for a wide range of biomedical applications, photoacoustic imaging systems can be briefly categorized into two types: photoacoustic tomography (PAT, the focus of this chapter) and photoacoustic microscopy (PAM). We will first briefly describe the endogenous (e.g. hemoglobin and melanin) and exogenous contrast agents (e.g. indocyanine green, various gold nanoparticles, single-walled carbon nanotubes, quantum dots, and fluorescent proteins) for photoacoustic imaging. Next, we will discuss in detail the applications of non-targeted photoacoustic imaging. Recently, molecular photoacoustic (MPA) imaging has gained significant interest and a few proof-of-principle studies have been reported. We will summarize the current state-of-the-art of MPA imaging, including the imaging of gene expression and combination of photoacoustic imaging with other imaging modalities. Lastly, we will point out the obstacles facing photoacoustic imaging. Although photoacoustic imaging will likely continue to be a highly vibrant research field for the years to come, the key question of whether MPA imaging could provide significant advantages over non-targeted photoacoustic imaging remains to be demonstrated in the future. PMID:21880823

  6. Details of Layers in Victoria Crater's Cape St. Vincent

    NASA Technical Reports Server (NTRS)

    2007-01-01

    NASA's Mars Exploration Rover Opportunity rover spent about 300 sols (Martian days) during 2006 and 2007 traversing the rim of Victoria Crater. Besides looking for a good place to enter the crater, the rover obtained images of rock outcrops exposed at several cliffs along the way.

    The cliff in this image from Opportunity's panoramic camera (Pancam) is informally named Cape St. Vincent. It is a promontory approximately 12 meters (39 feet) tall on the northern rim of Victoria crater, near the farthest point along the rover's traverse around the rim. Layers seen in Cape St. Vincent have proven to be among the best examples of meter scale cross-bedding observed on Mars to date. Cross-bedding is a geologic term for rock layers which are inclined relative to the horizontal and which are indicative of ancient sand dune deposits. In order to get a better look at these outcrops, Pancam 'super-resolution' imaging techniques were utilized. Super-resolution is a type of imaging mode which acquires many pictures of the same target to reconstruct a digital image at a higher resolution than is native to the camera. These super-resolution images have allowed scientists to discern that the rocks at Victoria Crater once represented a large dune field, not unlike the Sahara desert on Earth, and that this dune field migrated with an ancient wind flowing from the north to the south across the region. Other rover chemical and mineral measurements have shown that many of the ancient sand dunes studied in Meridiani Planum were modified by surface and subsurface liquid water long ago.

    This is a Mars Exploration Rover Opportunity Panoramic Camera image acquired on sol 1167 (May 7, 2007), and was constructed from a mathematical combination of 16 different blue filter (480 nm) images.

  7. Hi-C: A Detailed View of the Sun - Duration: 11 seconds.

    NASA Video Gallery

    This 10-second movie includes imagery collected from the Atmospheric Imaging Assembly instrument flying on NASA's Solar Dynamics Observatory and Hi-C. Hi-Câ??s resolution is five times more detaile...

  8. The Space Place: Slyder: The Art of Weather

    NSDL National Science Digital Library

    Diane Fisher

    2008-03-18

    The Space Place has created this interactive Slyder game to help you learn about Earth and Space weather. To play the game and solve the puzzle, you will move the tiles around until they are in the correct order and the picture is revealed. Each image has a short description to help you learn important scientific information. Each Slyder board is rated as easy, medium, or hard. Players choose which level to answer.

  9. The Occipital Place Area Is Causally and Selectively Involved in Scene Perception

    E-print Network

    Dilks, Daniel D.

    Functional magnetic resonance imaging has revealed a set of regions selectively engaged in visual scene processing: the parahippocampal place area (PPA), the retrosplenial complex (RSC), and a region around the transverse ...

  10. Grounding for a computational model of place

    E-print Network

    Hockenberry, Matthew Curtis

    2006-01-01

    Places are spatial locations that have been given meaning by human experience. The sense of a place is it's support for experiences and the emotional responses associated with them. This sense provides direction and focus ...

  11. Sense of Place in Environmental Education

    ERIC Educational Resources Information Center

    Kudryavtsev, Alex; Stedman, Richard C.; Krasny, Marianne E.

    2012-01-01

    Although environmental education research has embraced the idea of sense of place, it has rarely taken into account environmental psychology-based sense of place literature whose theory and empirical studies can enhance related studies in the education context. This article contributes to research on sense of place in environmental education from…

  12. Literacy, Place and the Digital World

    ERIC Educational Resources Information Center

    Green, Bill

    2012-01-01

    Observing that place may be understood in a range of sometimes conflicting ways, the paper picks up on recent work within literacy studies on notions of place-making and locational disadvantage to argue for increasingly sophisticated and reflexive uses of place in the field, as a counterpoint to both increasing educational standardisation and…

  13. Anthropological Studies of Native American Place Names.

    ERIC Educational Resources Information Center

    Thornton, Thomas F.

    1997-01-01

    Traces development of Native American place name studies from Boas (1880s) to the present. Argues that place names convey information about physical environments but also reveal how people perceive, conceptualize, and utilize their environment. Suggests the utility of place names as a framework for cultural analysis and describes recent…

  14. A PROBABILITY MODEL FOR CENTRAL PLACE LOCATIONS

    Microsoft Academic Search

    MICHAEL F. DACEY

    1966-01-01

    A probability model for the locational properties of central place theory is formulated as a type of two-dimensional stochastic point process obtained by combining a random element with the hexagonal point lattice of classical central place theory. Lattice points identify equilibrium positions, and the realized position of each central place point is a random displacement from its equilibrium position. A

  15. CLUSTERING OF SERVICES IN CENTRAL PLACES

    Microsoft Academic Search

    THOMAS L. BELL; STANLEY R. LIEBER; GERARD RUSHTON

    1974-01-01

    Within a tertiary system entrepreneurs frequently must choose between places that command the largest local tributary population and places that possess the most desirable collection of complementary service activities. When command of tributary population is chosen over functional complementarity, the central place system increasingly assumes the clustering of activities in centers of a Lösch-like system and diverges from those to

  16. Place Attachment Advances in Theory, Methods and

    E-print Network

    Fried, Jeremy S.

    Place Attachment Advances in Theory, Methods and Applications Edited by Lynne C. Manzo and Patrick to cohere into a widely accepted trans-disciplinary theory (Patterson & Williams, 2005). Place represents to highlight two early themes that still shape research methods on people-place relationships as a central

  17. The place of the hyperlipidaemias

    PubMed Central

    Lloyd, June K.; West, Richard J.

    1978-01-01

    Of the primary hyperlipidaemias, familial hypercholesterolaemia (hyerbetalipoproteinaemia, type II) is always expressed in childhood and carries a high risk for the early development of coronary heart disease. The diagnosis can be established with a high degree of certainty by estimating the serum cholesterol concentration in selected children in whom the genetic risk is known to be great, e.g. if a parent or other first-degree relative is known to have the disease, or if a parent has had an attack of ischaemic heart disease at a young age. Screening of the general population in order to detect this disorder is not advocated. Treatment by either diet or drugs will lower serum cholesterol but long-term compliance is poor and the effect of treatment on the atherosclerotic process has not been evaluated. Follow-up studies must be maintained. Familial hypertriglyceridaemic states are rarely fully expressed during childhood, and screening for them at this age is not practicable. Control of co-existent obesity and dietary treatment are usually successful in lowering serum lipids but long-term results have not yet been evaluated. In a childhood population, single estimations of serum cholesterol or triglyceride should be interpreted with caution. Percentile rank correlations for serum cholesterol are of the order of 0·61 and for triglyceride of 0·31. Prediction of adult values cannot therefore be assured in childhood and the place of hyperlipidaemia in the childhood population as a risk factor for coronary heart disease in adult life is not established. Thus population screening of serum lipids in children cannot be justified. Evidence that a change in the diet of children which would be expected to lower serum lipids will also delay the development of atherosclerosis in general and coronary heart disease in particular is lacking. Nevertheless the dietary changes which have been recommended for adults can safely be followed by children, and changes in eating habits are perhaps more likely to succeed if promoted on a family basis rather than for individual sections of the population. PMID:206883

  18. National Standard Details Library An Electronic Library of Parametric CAD Details

    E-print Network

    Amor, Robert

    National Standard Details Library ­ An Electronic Library of Parametric CAD Details James Nyambayo the development of a demonstrator library of parameterised standard CAD Details on the Internet. The library of the project has been to develop a framework for the development of standard CAD details for specific areas

  19. Architecture and urbanism in Henri IV's Paris : the Place Royale, Place Dauphine, and Hôpital St. Louis

    E-print Network

    Ballon, Hilary Meg

    1985-01-01

    This dissertation concerns the extensive building program which Henri IV undertook in Paris from 1600 to 1610. Focusing on the place Royale (now called the place des Vosges) , the place Dauphine, rue Dauphine, and Pont ...

  20. Historical consideration of place: inviting multiple histories and narratives in place-based education

    NASA Astrophysics Data System (ADS)

    Lim, Miyoun

    2010-12-01

    Drawing upon van Eijck and Roth's notion of "place as chronotope," this review paper discusses historical consideration of place as it assists us to conceptualize place in its collective, political, and dialogical nature. In a place, we are positioned amidst of the multiplicity of histories and narratives within ever shifting various contexts of place. Historical consideration acknowledges multiplicity and marginalization in a place, thus, legitimizes multiple place histories and invites multiple narratives to engage in dialogical process of place. With historical consideration, place identity can be approached and framed in its collective, dialogical nature within larger social, political contexts of place. The paper further suggests that place based education should be able to acknowledge and invite multiple histories and marginalized voices of students into creating a place to dwell together.

  1. Fabrication of detail parts for superconducting magnets by resin transfer molding

    SciTech Connect

    Behan, M.R.; Hartmann, J.G.

    1993-08-03

    A method is described of fabricating a detail part for a superconducting magnet and also of fabricating a coil winding assembly for a superconducting magnet, comprising the steps of: (a) utilizing engineering specifications for a detail part to produce a master mold part for the detail part, while taking into account a calculated resin shrinkage factor; (b) utilizing the master mold part to fabricate a resin transfer mold for the detail part; (c) placing a preform for the detail part into the resin transfer mold and closing the mold with the preform therein; (d) injecting a two-stage curing resin into the resin transfer mold; (e) heating the resin transfer mold to partially cure the molded detail part; (f) removing the partially cured detail part from the resin transfer mold; (g) fabricating a coil winding assembly, while precisely positioning the partially cured detail part relative to the coil windings to produce a coil winding assembly; (h) placing the coil winding assembly into a curing press, and pressing and heating the coil winding assembly in the curing press, during which the detail part conforms to the coil winding and cures completely to produce a final coil winding assembly for a superconducting magnet.

  2. EarthShots: Satellite Images of Environmental Change

    NSDL National Science Digital Library

    2001-01-12

    EarthShots is an e-book of images (1972-present) showing recent environmental events through remotely sensed images while also introducing remote sensing techniques. Place-specific case studies offer before-and-after satellite imagery as well as descriptive text. Examples of case studies include agriculture along the Nile River Delta, urban development as it impacts the hydrology of the Imperial Valley in California, desertification in Southern Mauritania, the disastrous effects of the Mount St. Helens eruption in Washington, and glacial activity in Hubbard Glacier, Alaska. A world map allows users to access these instances of environmental change by geographic area. Information on remote sensing technology and an overview of the site is provided by a Garden City, Kansas case study. Each set of images and text are accompanied by a political/topographic map of the area, detailed information pertaining to the source of the satellite images and maps, and relevant references.

  3. 24. 'HANGAR SHEDS ELEVATIONS DETAILS; ARCHITECTURAL PLANS ...

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

    24. 'HANGAR SHEDS - ELEVATIONS - DETAILS; ARCHITECTURAL PLANS - PLANT AREA; MODIFICATION CENTER NO. 1, DAGGETT, CALIFORNIA.' Partial elevations, and details of sliding doors and ventilator flaps, as built. Contract no. W509 Eng. 2743; File no. 555/81, revision B, dated April 6, 1943. No sheet number. - Barstow-Daggett Airport, Hangar Shed No. 4, 39500 National Trails Highway, Daggett, San Bernardino County, CA

  4. Honours APPLICATION UG 2. CONTACT DETAILS

    E-print Network

    Du, Jie

    of Sydney student number: Citizenship: Australian citizen New Zealand citizen Australian permanent resident.e. not an Australian citizen, permanent resident or New Zealand citizen) Title: Gender: Family Name: Given names school/unit/discipline for further details. #12;4. HONOURS DETAILS Majors in science subject area(s) (if

  5. Horava-Lifshitz gravity with detailed balance

    E-print Network

    Daniele Vernieri; Thomas P. Sotiriou

    2012-12-18

    Horava-Lifshitz gravity with "detailed balance" but without the projectability assumption is discussed. It is shown that detailed balance is quite efficient in limiting the proliferation of couplings in Horava-Lifshitz gravity, and that its implementation without the projectability assumption leads to a theory with sensible dynamics. However, the (bare) cosmological constant is restricted to be large and negative.

  6. Understanding brains: details, intuition, and big data.

    PubMed

    Marder, Eve

    2015-05-01

    Understanding how the brain works requires a delicate balance between the appreciation of the importance of a multitude of biological details and the ability to see beyond those details to general principles. As technological innovations vastly increase the amount of data we collect, the importance of intuition into how to analyze and treat these data may, paradoxically, become more important. PMID:25965068

  7. ENHANCING LOW LIGHT IMAGES USING NEAR INFRARED FLASH IMAGES Shaojie Zhuo1

    E-print Network

    Sim, Terence

    re- stricts their applicability to static scenes. Moreover, in many Visible image V NIR image N BM3D-free image with fine details. It outperforms single image denoising methods such as BM3D. types of low light and detail enhancement methods. Index Terms-- Computational photography, near in- frared photography, image

  8. Timothy York, timothy.york@gmail.com (A paper written under the guidance of Prof. Raj Jain) Download Image sensors are everywhere. They are present in single shot digital cameras, digital video cameras, embedded in cellular phones, and many more places. W

    E-print Network

    Jain, Raj

    of Silicon Image Sensors 1.2 Measuring Light Intensity 1.3 CCD Image Sensors 1.4 CMOS Image Sensors 2) Download Abstract: Image sensors are everywhere. They are present in single shot digital cameras, digital the fundamentals of how a digital image sensor works, focusing on how photons are converted into electrical signals

  9. A Multiresolution Image Cache for Volume Rendering

    SciTech Connect

    LaMar, E; Pascucci, V

    2003-02-27

    The authors discuss the techniques and implementation details of the shared-memory image caching system for volume visualization and iso-surface rendering. One of the goals of the system is to decouple image generation from image display. This is done by maintaining a set of impostors for interactive display while the production of the impostor imagery is performed by a set of parallel, background processes. The system introduces a caching basis that is free of the gap/overlap artifacts of earlier caching techniques. instead of placing impostors at fixed, pre-defined positions in world space, the technique is to adaptively place impostors relative to the camera viewpoint. The positions translate with the camera but stay aligned to the data; i.e., the positions translate, but do not rotate, with the camera. The viewing transformation is factored into a translation transformation and a rotation transformation. The impostor imagery is generated using just the translation transformation and visible impostors are displayed using just the rotation transformation. Displayed image quality is improved by increasing the number of impostors and the frequency that impostors are re-rendering is improved by decreasing the number of impostors.

  10. Automated morphological image composition for mosaicing large image data sets

    Microsoft Academic Search

    Conrad Bielski; Jacopo Grazzini; Pierre Soille

    2007-01-01

    Users of remotely sensed imagery are often faced with the need to stitch two or more overlapping scenes together. This is generally referred to as image composition and the outcome is a single image with no overlapping regions which is also called an image mosaic. The most difficult part of image composition however, is deciding where to place the cut

  11. The structure of images

    Microsoft Academic Search

    Jan J. Koenderink

    1984-01-01

    In practice the relevant details of images exist only over a restricted range of scale. Hence it is important to study the dependence of image structure on the level of resolution. It seems clear enough that visual perception treats images on several levels of resolution simultaneously and that this fact must be important for the study of perception. However, no

  12. Object-based Detailed Vegetation Classification with Airborne High Spatial Resolution Remote Sensing Imagery

    Microsoft Academic Search

    Qian Yu; Peng Gong; Nick Clinton; Greg Biging; Maggi Kelly; Dave Schirokauer

    2006-01-01

    In this paper, we evaluate the capability of the high spatial resolution airborne Digital Airborne Imaging System (DAIS) imagery for detailed vegetation classification at the alliance level with the aid of ancillary topographic data. Image objects as minimum classification units were generated through the Fractal Net Evolution Approach (FNEA) segmentation using eCognition software. For each object, 52 features were calculated

  13. The IPOL Initiative: Publishing and Testing Algorithms on Line for Reproducible Research in Image Processing

    E-print Network

    Paris-Sud XI, Université de

    Image Processing On Line (IPOL) publishes image processing and image analysis algorithms, described on the development of image science. Keywords: reproducible research, image processing, implementation, web interface 1. Why Image Processing on Line? For computational sciences, detailed algorithms and implementations

  14. Image transfer protocol in progressively increasing resolution

    NASA Technical Reports Server (NTRS)

    Percival, Jeffrey W. (Inventor); White, Richard L. (Inventor)

    1999-01-01

    A method of transferring digital image data over a communication link transforms and orders the data so that, as data is received by a receiving station, a low detail version of the image is immediately generated with later transmissions of data providing progressively greater detail in this image. User instructions are accepted, limiting the ultimate resolution of the image or suspending enhancement of the image except in certain user defined regions. When a low detail image is requested followed by a request for a high detailed version of the same image, the originally transmitted data of the low resolution image is not discarded or retransmitted but used with later data to improve the originally transmitted image. Only a single copy of the transformed image need be retained by the transmitting device in order to satisfy requests for different amounts of image detail.

  15. 25. 'HANGAR SHEDS TRUSSES DETAILS; ARCHITECTURAL PLANS ...

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

    25. 'HANGAR SHEDS - TRUSSES - DETAILS; ARCHITECTURAL PLANS - PLANT AREA; MODIFICATION CENTER NO. 1, DAGGETT, CALIFORNIA.' Sections and details of trusses, ironwork, and joints, as modified to show ridge joint detail. As built. This blueline also shows the fire suppression system, added in orange pencil for 'Project 13: Bldgs. T-30, T-50, T-70, T-90' at a later, unspecified date. Contract no. W509 Eng. 2743; File no. 555/84, revision B, dated August 24, 1942. No sheet number. - Barstow-Daggett Airport, Hangar Shed No. 4, 39500 National Trails Highway, Daggett, San Bernardino County, CA

  16. IMAGES, IMAGES, IMAGES

    SciTech Connect

    Marcus, A.

    1980-07-01

    The role of images of information (charts, diagrams, maps, and symbols) for effective presentation of facts and concepts is expanding dramatically because of advances in computer graphics technology, increasingly hetero-lingual, hetero-cultural world target populations of information providers, the urgent need to convey more efficiently vast amounts of information, the broadening population of (non-expert) computer users, the decrease of available time for reading texts and for decision making, and the general level of literacy. A coalition of visual performance experts, human engineering specialists, computer scientists, and graphic designers/artists is required to resolve human factors aspects of images of information. The need for, nature of, and benefits of interdisciplinary effort are discussed. The results of an interdisciplinary collaboration are demonstrated in a product for visualizing complex information about global energy interdependence. An invited panel will respond to the presentation.

  17. Towards a Chronotopic Theory of "Place" in Place-Based Education

    ERIC Educational Resources Information Center

    van Eijck, Michiel; Roth, Wolff-Michael

    2010-01-01

    The notion of "place", as in "place-based education", has received considerable attention in educational theorizing because of its potential to link students, their lifeworlds, and their experiences in particular settings to formal education. However, in current debates of place-based education, the notion of "place" is emerging as problematic.…

  18. Sense of Place in the Practice and Assessment of Place-Based Science Teaching

    ERIC Educational Resources Information Center

    Semken, Steven; Freeman, Carol Butler

    2008-01-01

    We teach earth, ecological, and environmental sciences in and about "places" imbued with meaning by human experience. Scientific understanding is but one of the many types of meanings that can accrue to a given place. People develop emotional attachments to meaningful places. The "sense of place," encompassing the meanings and attachments that…

  19. Estimating Detailed Spectral Envelopes Using Articulatory Clustering 

    E-print Network

    Shiga, Yoshinori; King, Simon

    This paper presents an articulatory-acoustic mapping where detailed spectral envelopes are estimated. During the estimation, the harmonics of a range of F0 values are derived from the spectra of multiple voiced speech ...

  20. Simulating plant motion with levels of detail 

    E-print Network

    Flannery, Rebecca Lynn

    2013-02-22

    Levels of detail are an effective means of reducing computational power in three-dimensional computer animations. Simpler models are used to represent objects farther away from the camera. Without this simplification, the processor may get bogged...

  1. Space and Place – Popular Perceptions of Forests

    Microsoft Academic Search

    Carl J. Griffin

    \\u000a Few spaces are as richly generative of such contradictory perceptions as forests. To some, forests are magical places of enchantment\\u000a or places of self-discovery. To others, forests are barbarous places, refuges of dangerous animals and even more dangerous\\u000a men. These contradictions have fuelled a rich seam of popular lore. The persistent popularity of fables such as Hansel and\\u000a Gretel attests

  2. Simulation levels of detail for plant motion 

    E-print Network

    Beaudoin, Jacob Michael

    2013-02-22

    of the UNIVERSITY UNDERGRADUATE RESEARCH FELLOWS April 2004 Major: Computer Engineering SIMULATION LEVELS OF DETAIL FOR PLANT MOTION A Senior Honors Thesis by JACOB MICHAEL BEAUDOIN Submitted to the Office of Honors Programs & Academic Scholarships Texas...: Computer Engineering ABSTRACT Simulation Levels of Detail for Plant Motion. (April 2004) Jacob Michael Beaudoin Department of Computer Science Texas A&M University Fellows Advisor: Dr. John Keyser Department of Computer Science In this paper we...

  3. A Detailed Study of the GG Tau Circumbinary Disk

    NASA Astrophysics Data System (ADS)

    McCabe, Caer; Ghez, Andrea M.

    We present near-infrared images of the circumbinary disk surrounding the pre--main sequence binary star, GG Tau A, obtained with NICMOS aboard the Hubble Space Telescope. These images have a SNR ~100 × higher than previous ground based measurements, which allows the spatially resolved disk to be explored in detail. The geometry of the ring implies that the inner edge of the circumbinary disk is not circular, possibly due to interactions with the central binary star. Overall, the circumbinary disk intensity compared to the central stars increases with wavelength, suggesting the presence of large dust particles. These colors, however, show significant variations over the 13 arcsec2 covered by the disk, raising the possibility that disk inhomogeneities are present.

  4. A Detailed Study of the GG Tau Circumbinary Disk

    NASA Astrophysics Data System (ADS)

    McCabe, Caer-Eve; Ghez, Andrea M.

    We present near-infrared images of the circumbinary disk surrounding the pre--main-sequence binary star, GG Tau A, obtained with NICMOS aboard the Hubble Space Telescope. These images have a SNR ~25 times higher than previous ground-based measurements, which allows the spatially resolved disk to be explored in detail. The geometry of the ring implies that the circumbinary disk is not intrinsically circular, possibly due to interactions with the central binary star. Overall, the circumbinary disk is redder than the central binary, with the amount of red excess increasing with wavelength. Significant variations in color over the 13 arcsec2 covered by the disk are also observed, raising the possibility that disk inhomogeneities are present.

  5. The WorkPlace distributed processing environment

    NASA Technical Reports Server (NTRS)

    Ames, Troy; Henderson, Scott

    1993-01-01

    Real time control problems require robust, high performance solutions. Distributed computing can offer high performance through parallelism and robustness through redundancy. Unfortunately, implementing distributed systems with these characteristics places a significant burden on the applications programmers. Goddard Code 522 has developed WorkPlace to alleviate this burden. WorkPlace is a small, portable, embeddable network interface which automates message routing, failure detection, and re-configuration in response to failures in distributed systems. This paper describes the design and use of WorkPlace, and its application in the construction of a distributed blackboard system.

  6. Image and information management system

    NASA Technical Reports Server (NTRS)

    Robertson, Tina L. (Inventor); Raney, Michael C. (Inventor); Dougherty, Dennis M. (Inventor); Kent, Peter C. (Inventor); Brucker, Russell X. (Inventor); Lampert, Daryl A. (Inventor)

    2007-01-01

    A system and methods through which pictorial views of an object's configuration, arranged in a hierarchical fashion, are navigated by a person to establish a visual context within the configuration. The visual context is automatically translated by the system into a set of search parameters driving retrieval of structured data and content (images, documents, multimedia, etc.) associated with the specific context. The system places hot spots, or actionable regions, on various portions of the pictorials representing the object. When a user interacts with an actionable region, a more detailed pictorial from the hierarchy is presented representing that portion of the object, along with real-time feedback in the form of a popup pane containing information about that region, and counts-by-type reflecting the number of items that are available within the system associated with the specific context and search filters established at that point in time.

  7. Automating Shallow Seismic Imaging

    SciTech Connect

    Steeples, Don W.

    2004-12-09

    This seven-year, shallow-seismic reflection research project had the aim of improving geophysical imaging of possible contaminant flow paths. Thousands of chemically contaminated sites exist in the United States, including at least 3,700 at Department of Energy (DOE) facilities. Imaging technologies such as shallow seismic reflection (SSR) and ground-penetrating radar (GPR) sometimes are capable of identifying geologic conditions that might indicate preferential contaminant-flow paths. Historically, SSR has been used very little at depths shallower than 30 m, and even more rarely at depths of 10 m or less. Conversely, GPR is rarely useful at depths greater than 10 m, especially in areas where clay or other electrically conductive materials are present near the surface. Efforts to image the cone of depression around a pumping well using seismic methods were only partially successful (for complete references of all research results, see the full Final Technical Report, DOE/ER/14826-F), but peripheral results included development of SSR methods for depths shallower than one meter, a depth range that had not been achieved before. Imaging at such shallow depths, however, requires geophone intervals of the order of 10 cm or less, which makes such surveys very expensive in terms of human time and effort. We also showed that SSR and GPR could be used in a complementary fashion to image the same volume of earth at very shallow depths. The primary research focus of the second three-year period of funding was to develop and demonstrate an automated method of conducting two-dimensional (2D) shallow-seismic surveys with the goal of saving time, effort, and money. Tests involving the second generation of the hydraulic geophone-planting device dubbed the ''Autojuggie'' showed that large numbers of geophones can be placed quickly and automatically and can acquire high-quality data, although not under rough topographic conditions. In some easy-access environments, this device could make SSR surveying considerably more efficient and less expensive, particularly when geophone intervals of 25 cm or less are required. The most recent research analyzed the difference in seismic response of the geophones with variable geophone spike length and geophones attached to various steel media. Experiments investigated the azimuthal dependence of the quality of data relative to the orientation of the rigidly attached geophones. Other experiments designed to test the hypothesis that the data are being amplified in much the same way that an organ pipe amplifies sound have so far proved inconclusive. Taken together, the positive results show that SSR imaging within a few meters of the earth's surface is possible if the geology is suitable, that SSR imaging can complement GPR imaging, and that SSR imaging could be made significantly more cost effective, at least in areas where the topography and the geology are favorable. Increased knowledge of the Earth's shallow subsurface through non-intrusive techniques is of potential benefit to management of DOE facilities. Among the most significant problems facing hydrologists today is the delineation of preferential permeability paths in sufficient detail to make a quantitative analysis possible. Aquifer systems dominated by fracture flow have a reputation of being particularly difficult to characterize and model. At chemically contaminated sites, including U.S. Department of Energy (DOE) facilities and others at Department of Defense (DOD) installations worldwide, establishing the spatial extent of the contamination, along with the fate of the contaminants and their transport-flow directions, is essential to the development of effective cleanup strategies. Detailed characterization of the shallow subsurface is important not only in environmental, groundwater, and geotechnical engineering applications, but also in neotectonics, mining geology, and the analysis of petroleum reservoir analogs. Near-surface seismology is in the vanguard of non-intrusive approaches to increase knowledge of the shallow subsurface; our

  8. Distance Learning and Education as Place.

    ERIC Educational Resources Information Center

    Drucker, Susan J.; Gumpert, Gary

    1995-01-01

    Discusses distance learning and examines the role of the educational environment as a place with unique characteristics. Highlights include correspondence education, multimedia and tele-learning models of distance education, and the trend to socially isolate the educational experience, thereby changing the nature of schools as public places. (LRW)

  9. Section 2--Psychology in Its Place

    ERIC Educational Resources Information Center

    Radford, John

    2008-01-01

    In 1996, Graham Richards published "Putting Psychology in its Place: An introduction from a critical historical perspective." Here, I seek to consider what is or should be the "place" of Psychology in education, more particularly Higher Education, and not just from a historical perspective. This raises issues about several contexts in which…

  10. Facebook Application for Place Recommendation . . 40002

    E-print Network

    Runapongsa, Kanda

    Facebook Application for Place Recommendation 1 , 2 1,2 . . 40002 E-mail: 1,2 pjiranuwatt. This article proposes a Facebook application that recommends places based on the number of check is gathered via Facebook API requests. The experimental results of the developed Facebook application show

  11. EXAM PLACES K Chemistry Dept. Building

    E-print Network

    Hasýrcý, Vasýf

    .30 Proctors will pick-up exam papers from G. ERTA, T. TNÇER Surname Group Place Building Proctors Instructor EXAM Date: 04.06.2012 Time: 09.30 Proctors will pick-up exam papers from S. ÖZKAR, A. ÖNAL Surname. ERTA, D. TOFFOLI #12;Surname Group Place Building Proctors Instructor AKDENZ- HIDIROLU (70) 01 G-110

  12. Urban Environmental Education and Sense of Place

    ERIC Educational Resources Information Center

    Kudryavtsev, Alexey

    2013-01-01

    Urban environmental educators are trying to connect students to the urban environment and nature, and thus develop a certain sense of place. To do so, educators involve students in environmental stewardship, monitoring, activism, and outdoor recreation in cities. At the same time, sense of place has been linked to pro-environmental behaviors and…

  13. Central Place Theory and Zipf's Law

    Microsoft Academic Search

    Wen-Tai Hsu

    This paper provides a theory of the location of flrms and, as cities are groups of flrms, the emergence of cities. Using a model of equilibrium entry, this paper provides a microfoundation for central place theory and the conditions under which Zipf's law for cities emerges. Central place theory describes how a hierarchical city system with difierent layers of cities

  14. Central Place Theory and City Size Distribution

    Microsoft Academic Search

    Wen-Tai Hsu

    This paper proposes a theory of city size distribution via a hierarchy approach rather than the popular random growth process. It does so by formalizing central place theory using an equilibrium entry model and specifying the conditions under which city size distribution follows the power law. Central place theory describes the way in which a hierarchical city system with difierent

  15. Value of Construction Put in Place

    NSDL National Science Digital Library

    This newly released 21-page report from the Census Bureau estimates that, in November 1999, an annual rate of construction of $715.1 billion was put in place. In contrast, the November 1992 annual rate of construction put in place was $556.4 billion.

  16. SACRED NATURAL PLACES OF ESTONIA: REGIONAL ASPECTS

    Microsoft Academic Search

    Heiki Valk

    The article discusses the sacred natural places of Estonia from a regional perspective, outlining the two main regions - sea-oriented and inland. Regionality is most clearly expressed in the distribution of hiis sites - a phe- nomenon characteristic of sea-related areas. There are also other phenomena bound with specific areas, such as the distribution of natural healing places, farmstead offering

  17. Place fields and the cognitive map.

    PubMed

    Dudchenko, Paul A; Wood, Emma R

    2015-06-01

    The discovery of place cells by John O'Keefe in the early 1970s was a breakthrough not just for systems neuroscience, but also for psychology: place fields provided a clear neural substrate for the notion of a cognitive map, a construct devised to explain rat learning and spatial cognition. However, is the robust location-related firing of place cells still best conceptualised as a cognitive map? In this commentary, we reassess this view of hippocampus function in light of subsequent findings on place cells. We argue that as place fields encode local space, and as they are modulated by ongoing behavior, the representation they provide may be more cognitive than map-like. © 2015 Wiley Periodicals, Inc. PMID:25788229

  18. XUV coherent diffraction imaging in reflection geometry with low numerical aperture.

    PubMed

    Zürch, Michael; Kern, Christian; Spielmann, Christian

    2013-09-01

    We present an experimental realization of coherent diffraction imaging in reflection geometry illuminating the sample with a laser driven high harmonic generation (HHG) based XUV source. After recording the diffraction pattern in reflection geometry, the data must be corrected before the image can be reconstructed with a hybrid-input-output (HIO) algorithm. In this paper we present a detailed investigation of sources of spoiling the reconstructed image due to the nonlinear momentum transfer, errors in estimating the angle of incidence on the sample, and distortions by placing the image off center in the computation grid. Finally we provide guidelines for the necessary parameters to realize a satisfactory reconstruction within a spatial resolution in the range of one micron for an imaging scheme with a numerical aperture NA < 0.03. PMID:24103988

  19. Triton - Detail of Dark and Light Material

    NASA Technical Reports Server (NTRS)

    1989-01-01

    Voyager 2 acquired this black and white image of Triton, Neptune's largest satellite, during the night of Aug. 24-25, 1989. Triton's limb cuts obliquely across the middle of the image. The field of view is about 1,000 km (600 miles) across. Three irregular dark areas, surrounded by brighter material, dominate the image. Low-lying material with intermediate albedo occupies the central area, and fresh craters occur along the right margin. Sub-parallel alignment of linear patches of dark material shown in the lower and left part of the image suggests that the patches are structurally controlled. The Voyager Mission is conducted by JPL for NASA's Office of Space Science and Applications.

  20. Visibility-Based Forest Walk-Through Using Inertial Level of Detail Models

    Microsoft Academic Search

    Paulius Micikevicius; Charles E. Hughes

    2007-01-01

    Modern simulation and training applications often require visualization of large scenes with many complex objects. However, this places prohibitive requirements on graphics hardware. For example, while methods for rendering near photo-realistic vegetation scenes have been described in the literature, they require minutes of computation. In this paper we present scene and level of detail management (LOD) techniques for achieving interactive

  1. SUV Tracks On Mars? The 'Devil' is in the Details

    NASA Technical Reports Server (NTRS)

    1998-01-01

    Sport Utility Vehicles (SUVs) on Mars? Imagine the MOC imaging team's surprise on the morning of April 27, 1998, as the latest images came in from the 'Red Planet.'

    A picture taken by the camera on Mars Global Surveyor just one day earlier showed several thin, dark lines that--at first glance--looked like pathways blazed by off-road sport utility vehicles. Who's been driving around on Mars?

    The MOC image in question (#26403), seen here at full resolution of 13.8 meters (45 feet) per pixel, was obtained around 10:22 a.m. PDT on April 26, 1998, during Mars Global Surveyor's 264th orbit. North is approximately up, illumination is from the lower right. Located in eastern Arabia Terra near 16.5o N latitude, 311.4o W longitude, the image showed a number of natural features--small craters formed by meteor impact, several buttes and mesas left by erosion of the surrounding terrain, small dunes and drifts, and a mantle of dust that varies in thickness from place to place. But the new picture also showed two dark lines--each varying in width up to about 15 meters (49 feet)--that extended several kilometers/miles across the image.

    Lines like these have been seen before on Mars. They are most likely the result of dust devils--columnar vortices of wind that move across the landscape, pick up dust, and look somewhat like miniature tornadoes. Dust devils are a common occurrence in dry and desert landscapes on Earth as well as Mars. They form when the ground heats up during the day, warming the air immediately above the surface. As pockets of warm air rise and interfere with one another, they create horizontal pressure variations that, combined with other meteorological winds, cause the upward moving air to spin (the direction of the spin is controlled by the same Coriolis forces that cause terrestrial hurricanes to spin in specific directions). As the spinning column of air moves across the surface, it occasionally encounters dust on the surface, which it can suck upward. This dust rises into the spinning air, giving the appearance of a tornado-like column that moves across the landscape. As the column of air moves, its ability to pick up dust varies--sometimes they hold a lot of dust and are nearly opaque; sometimes you cannot even see them. Dust-devils rarely last long, since their very motion changes the conditions that allowed them to form in the first place.

    Mars Pathfinder detected the passage of several dust devils during its 83 days of operation on Mars in 1997. Mariner 9 and the Viking landers and orbiters of the 1970s also found evidence that dust devils occur on Mars; indeed, some Viking Orbiter images actually show dust devil clouds. MOC image 26403 is the latest entry in the body of evidence for the work of wind in the modern martian environment. The MOC Science Team is continuing to study these and other streaks caused by wind interacting with the martian surface.

    Malin Space Science Systems and the California Institute of Technology built the MOC using spare hardware from the Mars Observer mission. MSSS operates the camera from its facilities in San Diego, CA. The Jet Propulsion Laboratory's Mars Surveyor Operations Project operates the Mars Global Surveyor spacecraft with its industrial partner, Lockheed Martin Astronautics, from facilities in Pasadena, CA and Denver, CO.

  2. A comparative contrast-detail study of five medical displays

    SciTech Connect

    Samei, Ehsan; Ranger, Nicole T.; Delong, David M. [Duke Advanced Imaging Laboratories, Departments of Radiology, Biomedical Engineering, and Physics, Duke University, Durham, North Carolina 27710 (United States); Duke Advanced Imaging Laboratories, Department of Radiology, Duke University, Durham, North Carolina 27710 (United States); Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina 27710 (United States)

    2008-04-15

    The objective of this study was to compare the contrast-detail performance of five different commercial liquid crystal displays (LCDs) to other LCD and cathode-ray tube (CRT) displays for medical applications. A contrast-detail phantom, supplemented with 5 in. of acrylic, was imaged on a commercial digital radiographic system using techniques comparable to chest radiography. The phantom design enabled observer evaluation by a four-alternative forced choice paradigm. The acquired images were independently scored by five observers on five medical display devices: a 5 megapixel monochrome LCD, a 3 megapixel monochrome LCD, a 9 megapixel color LCD, a 5 megapixel monochrome CRT, and a mammographic-grade monochrome CRT. The data were analyzed using the method suggested by the manufacturer based on a nearest neighbor correction technique. They were further analyzed using a logistic regression response model with a natural threshold using an overall chi-square test for display type followed by pairwise comparisons for individual display performance. The differences between the display devices were small. The standard analysis of the results based on the manufacturer-recommended method did not yield any statistically discernible trend among displays. The logistic regression analysis, however, indicated that the 5 megapixel monochrome LCD was statistically significantly (p<0.0001) superior to the others, followed by the 3 megapixel monochrome LCD (p<0.0001). The three other displays exhibited lower but generally similar performance characteristics. The findings suggest that 5 and 3 megapixel monochrome LCDs provide comparable but subtly superior contrast detectability than other tested displays, with the former performing slightly better in the detection of subtle and fine details.

  3. Head CT (image)

    MedlinePLUS

    CT stands for computerized tomography. In this procedure, a thin X-ray beam is rotated around the ... D image of a section through the body. CT scans are very detailed and provide excellent information ...

  4. CT scan (image)

    MedlinePLUS

    CT stands for computerized tomography. In this procedure, a thin X-ray beam is rotated around the ... D image of a section through the body. CT scans are very detailed and provide excellent information ...

  5. Astronomical Image Classification

    Microsoft Academic Search

    S. C. Odewahn

    1994-01-01

    A brief review of the latest automated image classification techniques employed for all-sky survey work is presented. Special emphasis is placed on the use of neural network pattern recognition techniques in the field of astronomy. In assessing the quality of image recognition derived from this method particular attention is given to the problem of star-galaxy discrimination in large digital sky

  6. Detailed balance analysis of nanophotonic solar cells

    E-print Network

    Fan, Shanhui

    -idealities, and is useful for determining the theoretical limit of solar cell efficiency for a given structure. Our approachDetailed balance analysis of nanophotonic solar cells Sunil Sandhu, Zongfu Yu, and Shanhui Fan-voltage characteristic modeling of nanophotonic solar cells. This approach takes into account the intrinsic material non

  7. DETAILED COMPUTATIONAL MODELING OF MILITARY INCINERATORS

    Microsoft Academic Search

    Martin K. Denison; Christopher J. Montgomery; Adel F. Sarofim; Mike J. Bockelie

    2001-01-01

    The United States has selected incineration as one of the methods for destroying the highly toxic chemical agents and munitions contained within the Chemical Weapons Stockpile. In this paper we describe a suite of Computational Fluid Dynamic (CFD) based models that provide the ability to cond uct detailed simulations of chemical demilitarization incinerator operation. The models contain 3D furnace and

  8. Third Sound Amplification and Detailed Balance

    SciTech Connect

    Eddinger, J. D.; Ellis, F. M. [Department of Physics, Wesleyan University, Middletown, CT 06459 (United States)

    2006-09-07

    Condensation of atoms from the vapor into a third sound resonance is expected to be capable of acoustic amplification. This results from normal to superfluid conversion that coherently accommodates atoms into the third sound velocity field. Consideration of third sound in light of the equilibrium detailed balance between vapor particles and the superfluid film provides further evidence that acoustic amplification is attainable.

  9. Occupation Competency Profile: Steel Detailer Program.

    ERIC Educational Resources Information Center

    Alberta Learning, Edmonton. Apprenticeship and Industry Training.

    This document presents information about the apprenticeship training program of Alberta, Canada, in general and the steel detailer program in particular. The first part of the document discusses the following items: Alberta's apprenticeship and industry training system; the apprenticeship and industry training committee structure; local…

  10. CURRICULUM VITAE OF MATTHIAS ZAHN PERSONAL DETAILS

    E-print Network

    Zahn, Matthias

    CURRICULUM VITAE OF MATTHIAS ZAHN PERSONAL DETAILS Name: Dr. Matthias Zahn Address: ESSC: 0044 118 378 5173 Email: m.zahn@reading.ac.uk Homepage: http://www.nerc-essc.ac.uk/~maz/ Birth: 7 Sep OF MATTHIAS ZAHN JOURNAL PUBLICATIONS Zahn and Allan, Quantifying present and projected future atmospheric

  11. CURRICULUM VITAE OF MATTHIAS ZAHN PERSONAL DETAILS

    E-print Network

    Zahn, Matthias

    CURRICULUM VITAE OF MATTHIAS ZAHN PERSONAL DETAILS Name: Dr. Matthias Zahn Address: ESSC: 0044 118 378 5173 Email: m.zahn@reading.ac.uk Homepage: http://www.nerc-essc.ac.uk/~maz/ Birth: 7 Sep Page 1 #12;CURRICULUM VITAE OF MATTHIAS ZAHN RELEVANT EXPERIENCES 09/2010 Public outreach experience

  12. CURRICULUM VITAE OF MATTHIAS ZAHN PERSONAL DETAILS

    E-print Network

    Zahn, Matthias

    CURRICULUM VITAE OF MATTHIAS ZAHN PERSONAL DETAILS Name: Dr. Matthias Zahn Address: ESSC: 0044 118 378 5173 Email: m.zahn@reading.ac.uk Homepage: http://www.nerc-essc.ac.uk/~maz/ Nationality), Gymnasium Lohfeld, Bad Salzuflen, Germany Page 1 #12;CURRICULUM VITAE OF MATTHIAS ZAHN RELEVANT EXPERIENCES

  13. DETAILS OF CLAIM Name & Address of Placement:-

    E-print Network

    Mottram, Nigel

    DETAILS OF CLAIM Name & Address of Placement:- NUMBER OF ALL DATES NO. OF MILES METHOD OF TYPE) BELOW) TOTAL TRAVEL COST FROM TERM TIME ADDRESS TO PLACEMENT £ £ £ DEDUCT TRAVEL COSTS FROM TERM TIME ADDRESS TO UNIVERSITY AND RETURN OR PROVIDE A REASON FOR NO DEDUCTION: TOTALS £ £ £ DATES

  14. Color anaglyph stereo scatterplots: Construction details

    Microsoft Academic Search

    D. B. Carr; R. J. Littlefield

    1983-01-01

    For those that can see stereo, stereo scatterplots provide a powerful method of displaying data that has three dimensional structure. While not the best quality stereo presentation method, color anaglyph stereo is easily produced on raster color devices. This simplicity makes color anaglyph stereo a useful tool for exploratory interactive data analysis. Attention to several details can enhance anaglyph scatterplots.

  15. Color anaglyph stereo scatterplots: construction details

    Microsoft Academic Search

    D. B. Carr; R. J. Littlefield

    1983-01-01

    For those that can see stereo, stereo scatterplots provide a powerful method of displaying data that has three-dimensional structure. While not the best quality stereo presentation method, color anglyph stereo is easily produced on raster color devices. This simplicity makes color anaglyph stereo a useful tool for exploratory intractive data analysis. Attention to several details can enhance anaglyph scatterplots. This

  16. 5 CFR 317.903 - Details.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...Definition. In this section, detail means the temporary assignment of an SES member to another position (within or outside of the SES) or the temporary assignment of a non-SES member to an SES position, with the expectation that the...

  17. 5 CFR 317.903 - Details.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...Definition. In this section, detail means the temporary assignment of an SES member to another position (within or outside of the SES) or the temporary assignment of a non-SES member to an SES position, with the expectation that the...

  18. 5 CFR 317.903 - Details.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...Definition. In this section, detail means the temporary assignment of an SES member to another position (within or outside of the SES) or the temporary assignment of a non-SES member to an SES position, with the expectation that the...

  19. 5 CFR 317.903 - Details.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...Definition. In this section, detail means the temporary assignment of an SES member to another position (within or outside of the SES) or the temporary assignment of a non-SES member to an SES position, with the expectation that the...

  20. 5 CFR 317.903 - Details.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...Definition. In this section, detail means the temporary assignment of an SES member to another position (within or outside of the SES) or the temporary assignment of a non-SES member to an SES position, with the expectation that the...

  1. Details Of Collision-Avoidance Study

    NASA Technical Reports Server (NTRS)

    Chappell, Sheryl L.; Billings, Charles E.; Olsen, M. Christine; Scott, Barry C.; Tuttell, Robert J.; Kozon, Thomas E.

    1990-01-01

    Report provides background information on and detailed description of study of pilots' use of traffic-alert and collision-avoidance system (TCAS II) in simulated flights. Described in article, "Evaluation of an Aircraft-Collision-Avoidance System" (ARC-12367). Plans, forms, training narratives, scripts, questionnaires, and other information compiled.

  2. Detail design of the MPU Heavy Lifter

    Microsoft Academic Search

    H. Ludescher; S. A. Haugerud; M. Fernández Ruiz

    This paper gives insight into detail design of the MPU Heavy Lifter. The innovative structure is developed for offshore heavy lifting operations like removing or installing platforms. Its hull is composed of highly reinforced and prestressed lightweight concrete forming slabs and walls with thicknesses between 0.3 m and 0.9 m. Information is provided on the design procedure, on the basis

  3. Parking Details! MARCH BREAK OPEN HOUSE 2014

    E-print Network

    Ellis, Randy

    ! Parking Details! MARCH BREAK OPEN HOUSE 2014 There will be free parking on all Queen's University parking will be available, however please note these options will require payment and are not covered by our free event parking policy. Accessible parking is available upon request, please note this when

  4. Cover Letter Title Page (WITH Author Details)

    E-print Network

    Washington at Seattle, University of

    DRAFT Cover Letter #12;DRAFT Title Page (WITH Author Details) Click here to view linked References State Key Lab of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University; P Laboratory (STAR Lab), Department of Civil & Environmental Engineering, University of Washington, Box 352700

  5. Operationalizing Place: Discovering, Reasoning about, and Exploring Place Knowledge from Descriptions

    ERIC Educational Resources Information Center

    Adams, Benjamin Thomas

    2012-01-01

    Places and place types, such as "small town", play a fundamental role in how people organize knowledge about the world. Although places are commonly referenced in human communication, often they are not canonically defined and many of the properties people associate with them have proved difficult to operationalize. In information…

  6. The Terror of the Place: Anxieties of Place and the Cultural Narrative of Terrorism

    Microsoft Academic Search

    Bruce Janz

    2008-01-01

    Place is sometimes understood as reinforcing personal and cultural identity in the face of dissipating versions of modernism or postmodernism. However, that identity can also come with a variety of cultural neuroses and manias that are inscribed on place. I consider the ways in which terrorism has become a feature of place, and how we can expect to see the

  7. First Place -Clothing that Makes Me Feel Special Second Place Traditional Chinese Clothing ELISTUDENTVOICES

    E-print Network

    Florida, University of

    1 Highlights First Place - Clothing that Makes Me Feel Special Second Place ­ Traditional Chinese Clothing ELISTUDENTVOICES Volume 18, Issue 2 Summer 2014 Clothing that Makes Me Feel Special Stephany Gil First Place RW3 Behind every piece of clothing is a legendary story, usually related to who we are

  8. Calcium transient prevalence across the dendritic arbour predicts place field properties.

    PubMed

    Sheffield, Mark E J; Dombeck, Daniel A

    2015-01-01

    Establishing the hippocampal cellular ensemble that represents an animal's environment involves the emergence and disappearance of place fields in specific CA1 pyramidal neurons, and the acquisition of different spatial firing properties across the active population. While such firing flexibility and diversity have been linked to spatial memory, attention and task performance, the cellular and network origin of these place cell features is unknown. Basic integrate-and-fire models of place firing propose that such features result solely from varying inputs to place cells, but recent studies suggest instead that place cells themselves may play an active role through regenerative dendritic events. However, owing to the difficulty of performing functional recordings from place cell dendrites, no direct evidence of regenerative dendritic events exists, leaving any possible connection to place coding unknown. Using multi-plane two-photon calcium imaging of CA1 place cell somata, axons and dendrites in mice navigating a virtual environment, here we show that regenerative dendritic events do exist in place cells of behaving mice, and, surprisingly, their prevalence throughout the arbour is highly spatiotemporally variable. Furthermore, we show that the prevalence of such events predicts the spatial precision and persistence or disappearance of place fields. This suggests that the dynamics of spiking throughout the dendritic arbour may play a key role in forming the hippocampal representation of space. PMID:25363782

  9. Towards a detailed soot model for internal combustion engines

    SciTech Connect

    Mosbach, Sebastian; Celnik, Matthew S.; Raj, Abhijeet; Kraft, Markus [Department of Chemical Engineering and Biotechnology, University of Cambridge, Pembroke Street, Cambridge CB2 3RA (United Kingdom); Zhang, Hongzhi R. [Department of Chemical Engineering, University of Utah, 1495 East 100 South, Kennecott Research Building, Salt Lake City, UT 84112 (United States); Kubo, Shuichi [Frontier Research Center, Toyota Central R and D Labs., Inc., Nagakute, Aichi 480-1192 (Japan); Kim, Kyoung-Oh [Higashifuji Technical Center, Toyota Motor Corporation, Mishuku 1200, Susono, Shizuoka 480-1193 (Japan)

    2009-06-15

    In this work, we present a detailed model for the formation of soot in internal combustion engines describing not only bulk quantities such as soot mass, number density, volume fraction, and surface area but also the morphology and chemical composition of soot aggregates. The new model is based on the Stochastic Reactor Model (SRM) engine code, which uses detailed chemistry and takes into account convective heat transfer and turbulent mixing, and the soot formation is accounted for by SWEEP, a population balance solver based on a Monte Carlo method. In order to couple the gas-phase to the particulate phase, a detailed chemical kinetic mechanism describing the combustion of Primary Reference Fuels (PRFs) is extended to include small Polycyclic Aromatic Hydrocarbons (PAHs) such as pyrene, which function as soot precursor species for particle inception in the soot model. Apart from providing averaged quantities as functions of crank angle like soot mass, volume fraction, aggregate diameter, and the number of primary particles per aggregate for example, the integrated model also gives detailed information such as aggregate and primary particle size distribution functions. In addition, specifics about aggregate structure and composition, including C/H ratio and PAH ring count distributions, and images similar to those produced with Transmission Electron Microscopes (TEMs), can be obtained. The new model is applied to simulate an n-heptane fuelled Homogeneous Charge Compression Ignition (HCCI) engine which is operated at an equivalence ratio of 1.93. In-cylinder pressure and heat release predictions show satisfactory agreement with measurements. Furthermore, simulated aggregate size distributions as well as their time evolution are found to qualitatively agree with those obtained experimentally through snatch sampling. It is also observed both in the experiment as well as in the simulation that aggregates in the trapped residual gases play a vital role in the soot formation process. (author)

  10. Placing Innovation: A Geographic Information Systems

    E-print Network

    Placing Innovation: A Geographic Information Systems (GIS) Approach to Identifying EmergentUnderstanding Regional Innovative CapacityInnovative Capacity May 2007 #12;About ATP's Economic Assessment Office supported projects) · Outcomes (innovation in products, processes, and services from ATP supported projects

  11. Public places through the private eye

    E-print Network

    Gáspár, Zsuzsanna, 1967-

    1993-01-01

    The radical change in the pattern of everyday communication has corresponded with a rapid transformation of the character of public urban places and the way they are used. The urban network is no longer the primary space ...

  12. Library of Congress: Places in History

    NSDL National Science Digital Library

    What do Missouri and Virginia have in common? They are both two of the places profiled on the Library of Congress' "Places in History" site. This remarkable site brings together maps and other primary documents to profile interesting places across the broad span of American history. Currently, there are six entries, including First Battle of Bull Run, Rich Mountain and Vicinity, and Gulf Coast. This last feature is a great place to begin, as it includes several key maps and charts that document the Gulf Coast in Florida around the beginning of the Civil War. Along with these items, there is a listing of related resources at the Library. Visitors shouldn't miss the Extra Session of Congress area as it provides some great historical background on the extra session of Congress called by President Abraham Lincoln for July 4, 1861 that would discuss the Civil War.

  13. Knowledge to Go Places Equine Reproduction Laboratory

    E-print Network

    Knowledge to Go Places Equine Reproduction Laboratory College of Veterinary Medicine and Biomedical Reproduction Laboratory has a long history of incorporating stateoftheart reproduction techniques into clinical Laboratory 3101 Rampart Road, Fort Collins, CO 80523 or email application materials to pmccue

  14. 45 CFR 1386.92 - Place.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...PROGRAMS Practice and Procedure for Hearings Pertaining to States' Conformity and Compliance With Developmental Disabilities State Plans, Reports and Federal Requirements Preliminary Matters-Notice and Parties § 1386.92 Place....

  15. 45 CFR 1386.92 - Place.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...PROGRAMS Practice and Procedure for Hearings Pertaining to States' Conformity and Compliance With Developmental Disabilities State Plans, Reports and Federal Requirements Preliminary Matters-Notice and Parties § 1386.92 Place....

  16. 45 CFR 1386.92 - Place.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...PROGRAMS Practice and Procedure for Hearings Pertaining to States' Conformity and Compliance With Developmental Disabilities State Plans, Reports and Federal Requirements Preliminary Matters-Notice and Parties § 1386.92 Place....

  17. 45 CFR 1386.92 - Place.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...PROGRAMS Practice and Procedure for Hearings Pertaining to States' Conformity and Compliance With Developmental Disabilities State Plans, Reports and Federal Requirements Preliminary Matters-Notice and Parties § 1386.92 Place....

  18. "From this place and of this place:" climate change, sense of place, and health in Nunatsiavut, Canada.

    PubMed

    Cunsolo Willox, Ashlee; Harper, Sherilee L; Ford, James D; Landman, Karen; Houle, Karen; Edge, Victoria L

    2012-08-01

    As climate change impacts are felt around the globe, people are increasingly exposed to changes in weather patterns, wildlife and vegetation, and water and food quality, access and availability in their local regions. These changes can impact human health and well-being in a variety of ways: increased risk of foodborne and waterborne diseases; increased frequency and distribution of vector-borne disease; increased mortality and injury due to extreme weather events and heat waves; increased respiratory and cardiovascular disease due to changes in air quality and increased allergens in the air; and increased susceptibility to mental and emotional health challenges. While climate change is a global phenomenon, the impacts are experienced most acutely in place; as such, a sense of place, place-attachment, and place-based identities are important indicators for climate-related health and adaptation. Representing one of the first qualitative case studies to examine the connections among climate change, a changing sense of place, and health in an Inuit context, this research draws data from a multi-year community-driven case study situated in the Inuit community of Rigolet, Nunatsiavut, Canada. Data informing this paper were drawn from the narrative analysis of 72 in-depth interviews conducted from November 2009 to October 2010, as well as from the descriptive analysis of 112 questionnaires from a survey in October 2010 (95% response rate). The findings illustrated that climate change is negatively affecting feelings of place attachment by disrupting hunting, fishing, foraging, trapping, and traveling, and changing local landscapes-changes which subsequently impact physical, mental, and emotional health and well-being. These results also highlight the need to develop context-specific climate-health planning and adaptation programs, and call for an understanding of place-attachment as a vital indicator of health and well-being and for climate change to be framed as an important determinant of health. PMID:22595069

  19. Mars Polar Lander Site Surface Details

    NASA Technical Reports Server (NTRS)

    1999-01-01

    This picture is an enlargement of a portion of a MOC image taken in late July 1999, showing the onset of defrosting of the seasonal carbon dioxide frost cap (small, occasionally fan-shaped dark spots seen throughout this image). Two craters are seen in this image, a very rare occurrence on the south polar layered deposits. Shown for comparison at the same scale is a picture of Jack Murphy (now Qualcomm) Stadium in San Diego, California. Clearly visible in the inset is the baseball diamond and pitcher's mound; less clear but certainly visible are a number of automobiles (small light dots) in the parking lot west (to the left) of the stadium. The elevation of the sun in the Mars image is about 10o; the sunlight is coming from the bottom (north) in this image. The shadow of the rims of the craters can be used to determine their depths. The smaller crater in the bottom right corner is about 60 m (197 feet) across and 7 m (23 feet) deep; the large crater just below the inset is 175 m (574 feet) across and 17 m (56 feet) deep. Similar calculations for other features in the images indicate that much of the surface is smooth and flat. Relief is typically much less than 1-2 meters (3-7 feet) in height over areas of 10-15 meters across (33-49 feet).

    Malin Space Science Systems and the California Institute of Technology built the MOC using spare hardware from the Mars Observer mission. MSSS operates the camera from its facilities in San Diego, CA. The Jet Propulsion Laboratory's Mars Surveyor Operations Project operates the Mars Global Surveyor spacecraft with its industrial partner, Lockheed Martin Astronautics, from facilities in Pasadena, CA and Denver, CO.

  20. Fourier plane imaging microscopy

    SciTech Connect

    Dominguez, Daniel, E-mail: daniel.dominguez@ttu.edu; Peralta, Luis Grave de [Department of Physics, Texas Tech University, Lubbock, Texas 79409 (United States); Nano Tech Center, Texas Tech University, Lubbock, Texas 79409 (United States); Alharbi, Nouf; Alhusain, Mdhaoui [Department of Physics, Texas Tech University, Lubbock, Texas 79409 (United States); Bernussi, Ayrton A. [Nano Tech Center, Texas Tech University, Lubbock, Texas 79409 (United States); Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409 (United States)

    2014-09-14

    We show how the image of an unresolved photonic crystal can be reconstructed using a single Fourier plane (FP) image obtained with a second camera that was added to a traditional compound microscope. We discuss how Fourier plane imaging microscopy is an application of a remarkable property of the obtained FP images: they contain more information about the photonic crystals than the images recorded by the camera commonly placed at the real plane of the microscope. We argue that the experimental results support the hypothesis that surface waves, contributing to enhanced resolution abilities, were optically excited in the studied photonic crystals.

  1. Chord, Tie Bar & Crossbracing Joint Detail in Plan; Crossbracing ...

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

    Chord, Tie Bar & Crossbracing Joint Detail in Plan; Crossbracing Center Joint Detail in Plan; Chord Joining Detail in Plan & Elevation; Chord, Panel Post, Tie Bar, & Diagonal Brace Joint Detail; Crossbracing Center Joint Detail in Section; Chord, Panel Post, Tie Bar & Horizontal Brace Joint Detail - Narrows Bridge, Spanning Sugar Creek at Old County Road 280 East, Marshall, Parke County, IN

  2. Towards a chronotopic theory of "place" in place-based education

    NASA Astrophysics Data System (ADS)

    van Eijck, Michiel; Roth, Wolff-Michael

    2010-12-01

    The notion of place, as in place- based education, has received considerable attention in educational theorizing because of its potential to link students, their lifeworlds, and their experiences in particular settings to formal education. However, in current debates of place-based education, the notion of place is emerging as problematic. The purpose of this study is to contribute to a rethinking of place in a form that is appropriate for describing and theorizing its occurrence in a world we share with others. We understand place as the result of a dialectical and dialogical relation of the material world and its chronotopic (time-space) nature in the various conversations (discourses) in which it is constituted as this place; that is, we view place as a lived entity that results from a dialogical transaction between a community and its material environment at a particular moment in cultural-historical time and which hence shapes and is shaped by the identity of the people. We exemplify our rethinking with a case of an environmental education project in which place unfolds as a chronotope from a dialogue between scientific and indigenous voices. The implications of this rethinking of place for place-based education are discussed.

  3. Detailed balance in Horava-Lifshitz gravity

    E-print Network

    Gianluca Calcagni

    2010-02-04

    We study Horava-Lifshitz gravity in the presence of a scalar field. When the detailed balance condition is implemented, a new term in the gravitational sector is added in order to maintain ultraviolet stability. The four-dimensional theory is of a scalar-tensor type with a positive cosmological constant and gravity is nonminimally coupled with the scalar and its gradient terms. The scalar field has a double-well potential and, if required to play the role of the inflation, can produce a scale-invariant spectrum. The total action is rather complicated and there is no analog of the Einstein frame where Lorentz invariance is recovered in the infrared. For these reasons it may be necessary to abandon detailed balance. We comment on open problems and future directions in anisotropic critical models of gravity.

  4. Observe many representations of a single place

    NSDL National Science Digital Library

    TERC. Center for Earth and Space Science Education

    2003-01-01

    Created for high school students, this interactive Earth science visualization presents eight different images of Mount Shasta, a volcano in California. Among the eight views are a satellite image, a geologic map, and a plot of lava flows in the area. When students click on each image, they will see either an enlargement of it or, in the case of the 3-D fly-around image, a short movie. Students can also click on a button to open a U.S. map that shows where Mount Shasta is located. Copyright 2005 Eisenhower National Clearinghouse

  5. Revisiting the Seductive Details Effect in Multimedia Learning: Context-Dependency of Seductive Details

    ERIC Educational Resources Information Center

    Ozdemir, Devrim; Doolittle, Peter

    2015-01-01

    The purpose of this study was to investigate the effects of context-dependency of seductive details on recall and transfer in multimedia learning environments. Seductive details were interesting yet irrelevant sentences in the instructional text. Two experiments were conducted. The purpose of Experiment 1 was to identify context-dependent and…

  6. Detailed balance limit for solar cell efficiency

    Microsoft Academic Search

    Hans J. Queisser

    2009-01-01

    The principle of detailed balance was used in 1960 to derive a thermodynamic limit for energy conversion efficiency of semiconductor junction photovoltaic cells. Absorption and emission of photons must be balanced, the cell being a black body. Non-radiative recombinations of solar-generated electron–hole pairs are thus particularly deleterious, affecting silicon junctions. Gallium arsenide, however, is inherently more efficient because of its

  7. New details on nuclear weapons program bared

    Microsoft Academic Search

    Hileman

    1994-01-01

    In a continuing effort to be more candid about Department of Energy nuclear weapons programs, Energy Secretary Hazel R. O'Leary recently declassified a substantial amount of information. On June 27, she revealed details about total US weapons-grade uranium production, testing of a bomb made of reactor-grade plutonium, radiation experiments conducted on humans since the 1920s, and underground and atmospheric nuclear

  8. Memory for details with self-referencing.

    PubMed

    Serbun, Sarah J; Shih, Joanne Y; Gutchess, Angela H

    2011-11-01

    Self-referencing benefits item memory, but little is known about the ways in which referencing the self affects memory for details. Experiment 1 assessed whether the effects of self-referencing operate only at the item, or general, level or whether they also enhance memory for specific visual details of objects. Participants incidentally encoded objects by making judgements in reference to the self, a close other (one's mother), or a familiar other (Bill Clinton). Results indicate that referencing the self or a close other enhances both specific and general memory. Experiments 2 and 3 assessed verbal memory for source in a task that relied on distinguishing between different mental operations (internal sources). The results indicate that self-referencing disproportionately enhances source memory, relative to conditions referencing other people, semantic, or perceptual information. We conclude that self-referencing not only enhances specific memory for both visual and verbal information, but can also disproportionately improve memory for specific internal source details. PMID:22092106

  9. Changes as of 2011-12: Physics 42 added to placement for AP Physics C (Mechanics) Place Out Of Take Place Out Of Take Place Out Of Take

    E-print Network

    Wechsler, Risa H.

    Series* Place Out Of Take Place Out Of Take Place Out Of Take 5 21/22, 23/24 25 N/A N/A N/A N/A 8 Qtr (Mechanics) 40 Series* Place Out Of Take Place Out Of Take Place Out Of Take 4 or 5 21/22 23, 25 41/42 43, 45* Place Out Of Take Place Out Of Take Place Out Of Take 4 or 5 23/24 21, 25 43/44 41, 45 N/A N/A 5 Qtr

  10. Space Place: What is the Secret Code Used by the Voyager Spacecraft?

    NSDL National Science Digital Library

    This module from the Space Place Web site allows students to learn the secret code spacecraft use to send images back from space. It introduces the language of computers and spacecraft. Binary and hexadecimal notations are explained. The Space Place is an educational NASA site for children and adults with activities and facts related to the exploration of space – past, current and future. Some activities are computer-interactive and many are real-world-interactive.

  11. Towards Next-Generation Search Engines and Browsers - Search Beyond Media Types and Places

    Microsoft Academic Search

    Katsumi Tanaka

    2006-01-01

    In this keynote talk, the author will describe concepts and technologies for next-generation search engines and browsers for\\u000a searching and browsing contents beyond media types and places. Currently, digital content are represented by different media\\u000a such as text, images, video etc. Also, digital content are created, stored and used on a variety of places (devices) such\\u000a as independent digital archives,

  12. Photon count and contrast-detail detection potential comparison between parallel and fan beam brain SPECT

    SciTech Connect

    Kim, K.I.; Lim, C.B.

    1986-02-01

    Current brain SPECT based on parallel beam projection with round shape Anger cameras suffers from both low sensitivity and poor resolution due to shoulder interference. SPECT using fan beam projection with a wide rectangular camera would significantly improve image quality by increased sensitivity and close brain access. For experimental verification a rectangular camera of 16'' x 8.7'' FOV has been developed with a shoulder edge of 3''. For this geometry sensitivity and resolution improvement have been measured. Fan beam imaging tests verified the analysis results by showing 60% sensitivity increase and resolution improvement to 10 mm from 13-14 mm at image center. In order to assess the imaging improvement level quantitatively, analytical comparison on SPECT contrast-detail detectability has been made. Experimental contrast-detail detectability comparison between parallel and fan beam brain SPECT is presented together with the predicted model result.

  13. New Method for Image Denoising while Keeping Edge Information

    Microsoft Academic Search

    Liu Wei

    2009-01-01

    Edge information is the most important high-frequency information of an image, so we should try to maintain more edge information while denoising. In order to preserve image details as well as canceling image noise, we present a new image denoising method: image denoising based on edge detection. Before denoising, image's edges are first detected, and then the noised image is

  14. Application of Wavelets Analysis in Image Denoising

    Microsoft Academic Search

    Xiao-Feng Gu; Jin-Xin Shi; Jian-Ping Li; Yuan-Yuan Huang; Jie Lin

    2008-01-01

    Aiming at the problems of images denoising, wavelet algorithm is introduced simply. The technology of images denoising based on wavelet are analyzed in detail. Image denoising is achieved by Matlab. Two thresholding in the process of image denoising are compared by the results of experiments. Meanwhile, the advantages of image denoising by wavelet is proved.

  15. Magnetic resonance imaging

    SciTech Connect

    Stark, D.D.; Bradley, W.G. Jr.

    1988-01-01

    The authors present a review of magnetic resonance imaging. Many topics are explored from instrumentation, spectroscopy, blood flow and sodium imaging to detailed clinical applications such as the differential diagnosis of multiple sclerosis or adrenal adenoma. The emphasis throughout is on descriptions of normal multiplanar anatomy and pathology as displayed by MRI.

  16. How Are Community College Students Assessed and Placed in Developmental Math? Grounding Our Understanding in Reality

    ERIC Educational Resources Information Center

    Melguizo, Tatiana; Kosiewicz, Holly; Prather, George; Bos, Johannes

    2014-01-01

    The study's main objective was to provide a detailed description of math Assessment and Placement (A&P) policies in the Los Angeles Community College District (LACCD). The study was focused on math because a larger proportion of students place into remedial math than remedial reading or English (Bailey, Jeong, & Cho, 2010; Parsad,…

  17. Automating Shallow Seismic Imaging

    SciTech Connect

    Steeples, Don W.

    2003-06-01

    Our primary research focus during the current three-year period of funding has been to develop and demonstrate an automated method of conducting two-dimensional (2D) shallow-seismic surveys with the goal of saving time, effort, and money. Recent tests involving the second generation of the hydraulic geophone-planting device dubbed the ''Autojuggie'' have shown that large numbers of geophones can be placed quickly and automatically and can acquire high-quality data, although not under all conditions (please see the Status and Results of Experiments sections for details). In some easy-access environments, this device is expected to make shallow seismic surveying considerably more efficient and less expensive. Another element of our research plan involved monitoring the cone of depression around a pumping well, with the well serving as a proxy location for fluid-flow at a contaminated DOE site. To try to achieve that goal, we collected data from a well site at which drawdown equilibrium had been reached and at another site during a pumping test. Data analysis disclosed that although we were successful in imaging the water table using seismic reflection techniques (Johnson, 2003), we were not able to explicitly delineate the cone of depression (see Status and Results of Experiments).

  18. GPI detailed spectroscopic and astrometric characterization of HR 8799cde.

    NASA Astrophysics Data System (ADS)

    Marois, Christian; Draper, Zack; Barman, Travis; Konopacky, Quinn; Patience, Jennifer; Ingraham, Patrick; Macintosh, Bruce; Lafreniere, David; Matthews, Brenda

    2014-08-01

    We are proposing deep high signal-to-noise ratio (SNR) Gemini Planet Imager (GPI) Y, J, H and K1/K2 spectroscopy/photometry of the three inner planets of HR 8799. With GPI's superior contrast, and our advanced data reduction and analysis pipeline, these observations will revolutionize our understanding of the system's planets by allowing, for the first time, detailed high-SNR near infrared spectroscopy of planet e, as well as complementary planet c and d spectroscopy at Y-, J-, H- and K-band. The data will also be used to derive highly accurate relative astrometry of the three planets, allowing for more precise orbital characterization and detection of acceleration, a key value to properly constrain the system&'s orbital configuration.

  19. 39. CLOSE UP DETAIL OF THE FEEDER AND STAMP CONNECTION. ...

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

    39. CLOSE UP DETAIL OF THE FEEDER AND STAMP CONNECTION. THE STAMP AN MORTAR BOX ARE ON THE LEFT AND THE FEEDER WITH ITS FEEDER DISK IS ON THE RIGHT. NOTE THE COLLAR ON THE CENTER STAMP STEM (UPPER LEFT CORNER OF THE IMAGE) THAT ACTIVATES THE LEVER IN THE CENTER OF THE PHOTO. THE COLLAR IS POSITIONED SUCH THAT WHEN THE LEVEL OF THE MATERIAL REACHES A LOW POINT IN THE MORTAR BOX IT PUSHES DOWN ON THE LEVER WHICH IN TURN ACTIVATES THE AUTOMATIC FEEDER DRIVE MECHANISM WHICH THEM DELIVERS ORE INTO THE BACKSIDE OF THE MORTAR BOX. - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

  20. Detailed Primitive-Based 3d Modeling of Architectural Elements

    NASA Astrophysics Data System (ADS)

    Remondino, F.; Lo Buglio, D.; Nony, N.; De Luca, L.

    2012-07-01

    The article describes a pipeline, based on image-data, for the 3D reconstruction of building façades or architectural elements and the successive modeling using geometric primitives. The approach overcome some existing problems in modeling architectural elements and deliver efficient-in-size reality-based textured 3D models useful for metric applications. For the 3D reconstruction, an opensource pipeline developed within the TAPENADE project is employed. In the successive modeling steps, the user manually selects an area containing an architectural element (capital, column, bas-relief, window tympanum, etc.) and then the procedure fits geometric primitives and computes disparity and displacement maps in order to tie visual and geometric information together in a light but detailed 3D model. Examples are reported and commented.

  1. Detailed characterization of plasma wave behavior using collective Thomson scattering

    SciTech Connect

    Montgomery, D. S. (David S.); Kline, J. L. (John L.); Tierney, T. (Thomas)

    2004-01-01

    Collective Thomson scattering is widely used to measure bulk plasma parameters in high density, laser-produced plasmas, and is used to detect plasma waves from instabilities. However, inhomogeneity in these small plasmas often leads to a spectrum with insufficient resolution to discern phenomena such as wave damping and nonlinear wave effects. Two techniques are discussed for laser-produced plasmas to overcome these limitations, and provide details of wave damping and nonlinear behavior. First, imaging Thomson scattering is used to obtain spatially-resolved plasma wave profiles in a 100-200 eV plasma, and allows us to infer ion-ion collisional damping rates. Second, a diffraction-limited laser beam is used to drive stimulated Raman scattering (SRS) in a hot plasma, generating large amplitude Langmuir waves. The comparatively small interaction volume permits sufficient spectral resolution to observe nonlinear wave behavior, previously unresolved in other experiments.

  2. Optomechanical details in injection-molded assemblies

    Microsoft Academic Search

    Raymond T. Hebert

    1995-01-01

    With the advent of low-cost electro-optic components such as LEDs, laser diodes and CCD imaging devices, the cost and performance demands now fall upon the optical subsystems in order to achieve realistic marketing targets for many emerging commercial and consumer products. One of the many benefits of injection-molded plastic optics is the diversity of features that are available to the

  3. A Case for Detailed Surface Analysis.

    NASA Astrophysics Data System (ADS)

    Sanders, Frederick; Doswell, Charles A., III

    1995-04-01

    Detailed analysis of the temperature and moisture fields based on routine hourly surface observations in North America can provide a rational basis for surface feature analysis, thus clarifying the present confusion. Recognition of surface features is an important part of weather forecasting and is especially needed in a careful diagnosis for the prospects of deep convection.Surface temperature gradients are advocated as the primary basis for identifying fronts; examples are given of gross discrepancies in current operational practice between the surface temperature fields and the associated frontal analyses. Surface potential temperature, selected as a means of compensating for elevation differences, is analyzed in the western United States for a period in which a strong, damaging cold front develops and dissipates over a period of less than 24 h. Frontogenesis-related calculations, based on detailed surface temperature analyses, help to explain a case of focusing of heavy precipitation in northern Kentucky that produced a flash flood.Conditions for the initiation of intense convection are illustrated by detailed analyses of the surface moisture and temperature fields. These are used to estimate the buoyancy of surface air lifted to midtroposphere and show the relationship of this buoyancy to ensuing convection. The analyses aid in recognition of the surface dryline (a feature commonly misanalyzed as a cold front) and those convectively produced pools of cold air at the surface that often play a major role in the subsequent redevelopment of convection.The proposed analyses might be difficult to achieve manually in operational practice during busy weather situations, but this could be facilitated by using objective methods with present and prospective workstations. Once surface features are identified, their temporal and spatial evolution must be followed carefully since they can change rapidly.

  4. Instrumentation for detailed bridge-scour measurements

    USGS Publications Warehouse

    Landers, Mark N.; Mueller, David S.; Trent, Roy E.

    1993-01-01

    A portable instrumentation system is being developed to obtain channel bathymetry during floods for detailed bridge-scour measurements. Portable scour measuring systems have four components: sounding instrument, horizontal positioning instrument, deployment mechanisms, and data storage device. The sounding instrument will be a digital fathometer. Horizontal position will be measured using a range-azimuth based hydrographic survey system. The deployment mechanism designed for this system is a remote-controlled boat using a small waterplane area, twin-hull design. An on-board computer and radio will monitor the vessel instrumentation, record measured data, and telemeter data to shore.

  5. Academic Detailing to Teach Aging and Geriatrics.

    PubMed

    Duckett, Ashley; Cuoco, Theresa; Pride, Pamela; Wiley, Kathy; Iverson, Patty J; Marsden, Justin; Moran, William; Caton, Cathryn

    2015-01-01

    Geriatric education is a required component of internal medicine training. Work hour rules and hectic schedules have challenged residency training programs to develop and utilize innovative teaching methods. In this study, the authors examined the use of academic detailing as a teaching intervention in their residents' clinic and on the general medicine inpatient wards to improve clinical knowledge and skills in geriatric care. The authors found that this teaching method enables efficient, directed education without disrupting patient care. We were able to show improvements in medical knowledge as well as self-efficacy across multiple geriatric topics. PMID:24794649

  6. Implementation details of the coupled QMR algorithm

    NASA Technical Reports Server (NTRS)

    Freund, Roland W.; Nachtigal, Noel M.

    1992-01-01

    The original quasi-minimal residual method (QMR) relies on the three-term look-ahead Lanczos process, to generate basis vectors for the underlying Krylov subspaces. However, empirical observations indicate that, in finite precision arithmetic, three-term vector recurrences are less robust than mathematically equivalent coupled two-term recurrences. Therefore, we recently proposed a new implementation of the QMR method based on a coupled two-term look-ahead Lanczos procedure. In this paper, we describe implementation details of this coupled QMR algorithm, and we present results of numerical experiments.

  7. Study defines surges in greater detail

    SciTech Connect

    Burke, J.J.

    1980-06-01

    A joint Power Technologies Inc. (PTI)-Electric Power Research Institute (EPRI) study on new equipment designed for fault analysis and cold-load pickup on distribution systems will be helpful for reviewing distribution design standards. The study is leading to equipment developments that will increase customer reliability. The new versatile surge recorder will monitor voltage and current surges in more detail than existing equipment and will provide more information on the nature and frequency of faults than is presently known. The surge recorder is undergoing tests at 14 widely separated utilities. Cost justifications for the device will be tied to its analytical capabilities and its capacity as a troubleshooting tool. (DCK)

  8. Detailed nuclear structure studies far from stability

    SciTech Connect

    Wood, J.L.; Schwarzenberg, J. [Georgia Inst. of Tech., Atlanta, GA (United States); Zganjar, E.F.; Rupnik, D. [Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy

    1991-12-31

    State-of--the-art spectroscopy of nuclei far from stability has achieved an extraordinary level of sophistication and detail in the last ten years. In principle, if a state can be populated, it can be characterized by its energy, spin, parity, and major decay paths. Sometimes its lifetime can be measured. In practice, one is confronted with enormous complexity. To convert raw spectroscopic data into nuclear structure data involves a complex process of disentangling gamma rays and conversion electrons into decay schemes. Specifically, coincidence techniques, especially coincidence intensities, play a crucial role in this process. Recent examples and methods from work done at UNISOR are presented.

  9. Detailed nuclear structure studies far from stability

    SciTech Connect

    Wood, J.L.; Schwarzenberg, J. (Georgia Inst. of Tech., Atlanta, GA (United States)); Zganjar, E.F.; Rupnik, D. (Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy)

    1991-01-01

    State-of--the-art spectroscopy of nuclei far from stability has achieved an extraordinary level of sophistication and detail in the last ten years. In principle, if a state can be populated, it can be characterized by its energy, spin, parity, and major decay paths. Sometimes its lifetime can be measured. In practice, one is confronted with enormous complexity. To convert raw spectroscopic data into nuclear structure data involves a complex process of disentangling gamma rays and conversion electrons into decay schemes. Specifically, coincidence techniques, especially coincidence intensities, play a crucial role in this process. Recent examples and methods from work done at UNISOR are presented.

  10. Imaging with Second-Harmonic Generation Nanoparticles

    NASA Astrophysics Data System (ADS)

    Hsieh, Chia-Lung

    Second-harmonic generation nanoparticles show promise as imaging probes due to their coherent and stable signal with a broad flexibility in the choice of excitation wavelength. In this thesis, we developed and demonstrated barium titanate nanoparticles as second-harmonic radiation imaging probes. We studied the absolute second-harmonic generation efficiency of the nanoparticles on single-particle level. The polarization dependent second-harmonic signal of single nanoparticles was studied in detail. From the measured polar response, we were able to find the orientation of the nanoparticle. We developed a biochemical interface for using the second-harmonic nanoprobes as biomarkers, including in vitro cellular imaging and in vivo live animal imaging. The nanoparticles were surface functionalized with primary amine groups for stable colloidal dispersion. We achieved specific labeling of the second-harmonic nanoprobes via immunostaining where the antibodies were covalently conjugated onto the nanoparticles. We observed no toxicity of the functionalized nanoparticles to biological cells. The coherent second-harmonic signal radiated from the nanoparticles offers opportunities for new imaging techniques. Using interferometric detection, namely harmonic holography, both amplitude and phase of the second-harmonic field can be captured. Through digital beam propagation, three-dimensional field distribution, reflecting three-dimensional distribution of the nanoparticles, can be reconstructed. We achieved a scan-free three-dimensional imaging of nanoparticles in biological cells with sub-micron spatial resolution by using the harmonic holographic microscope. We further exploited the coherent second-harmonic signal for imaging through scattering media by performing optical phase conjugation of the second-harmonic signal. We demonstrated an all-digital optical phase conjugation of the second-harmonic signal originated from a nanoparticle by combining harmonic holography and dynamic computer generated holography using a spatial light modulator. The phase-conjugated second-harmonic scattered field retraced the scattering trajectory and formed a clean focus on the nanoparticle placed inside a scattering medium. The nanoparticle acted as a beacon of light; it helped us find the tailored wavefront for concentrating light at the nanoparticle inside the scattering medium. We also demonstrated imaging through a thin scattering medium by raster-scanning the phase-conjugated focus in the vicinity of the beacon nanoparticle, in which a clear image of a target placed behind a ground glass diffuser was obtained.

  11. Image interpolation with directionlets

    Microsoft Academic Search

    Vladan Velisavljevic; Raphael Coquoz

    2008-01-01

    We present a novel directionally adaptive image interpolation based on a multiple-direction wavelet transform, called directionlets. The algorithm uses directionlets to efficiently capture directional features and to extract edge information along different directions from the low-resolution image. Then, the high-resolution image is generated using this information to preserve sharpness of details. Our interpo- lation algorithm outperforms the state-of-the-art methods in

  12. Apple Image Processing Educator

    NASA Technical Reports Server (NTRS)

    Gunther, F. J.

    1981-01-01

    A software system design is proposed and demonstrated with pilot-project software. The system permits the Apple II microcomputer to be used for personalized computer-assisted instruction in the digital image processing of LANDSAT images. The programs provide data input, menu selection, graphic and hard-copy displays, and both general and detailed instructions. The pilot-project results are considered to be successful indicators of the capabilities and limits of microcomputers for digital image processing education.

  13. Study of the detail content of Apollo orbital photography

    NASA Technical Reports Server (NTRS)

    Kinzly, R. E.

    1972-01-01

    The results achieved during a study of the Detail Content of Apollo Orbital Photography are reported. The effect of residual motion smear or image reproduction processes upon the detail content of lunar surface imagery obtained from the orbiting command module are assessed. Data and conclusions obtained from the Apollo 8, 12, 14 and 15 missions are included. For the Apollo 8, 12 and 14 missions, the bracket-mounted Hasselblad camera had no mechanism internal to the camera for motion compensation. If the motion of the command module were left totally uncompensated, these photographs would exhibit a ground smear varying from 12 to 27 meters depending upon the focal length of the lens and the exposure time. During the photographic sequences motion compensation was attempted by firing the attitude control system of the spacecraft at a rate to compensate for the motion relative to the lunar surface. The residual smear occurring in selected frames of imagery was assessed using edge analyses methods to obtain and achieved modulation transfer function (MTF) which was compared to a baseline MTF.

  14. Indirect Geospatial Referencing through Place Names in the Digital Library: Alexandria Digital Library Experience with Developing and Implementing Gazetteers

    Microsoft Academic Search

    Linda L. Hill; Qi Zheng

    All types of information can be referenced to a geographic place. Maps, aerial photographs, and remote sensing images are spatially georeferenced. Other forms of information such as books, articles, research papers, pieces of music, and art are often linked to a geographic location through place names (geographic names). A gazetteer (a dictionary of geographic names) that is spatially referenced itself

  15. Parallel MR Imaging

    PubMed Central

    Deshmane, Anagha; Gulani, Vikas; Griswold, Mark A.; Seiberlich, Nicole

    2015-01-01

    Parallel imaging is a robust method for accelerating the acquisition of magnetic resonance imaging (MRI) data, and has made possible many new applications of MR imaging. Parallel imaging works by acquiring a reduced amount of k-space data with an array of receiver coils. These undersampled data can be acquired more quickly, but the undersampling leads to aliased images. One of several parallel imaging algorithms can then be used to reconstruct artifact-free images from either the aliased images (SENSE-type reconstruction) or from the under-sampled data (GRAPPA-type reconstruction). The advantages of parallel imaging in a clinical setting include faster image acquisition, which can be used, for instance, to shorten breath-hold times resulting in fewer motion-corrupted examinations. In this article the basic concepts behind parallel imaging are introduced. The relationship between undersampling and aliasing is discussed and two commonly used parallel imaging methods, SENSE and GRAPPA, are explained in detail. Examples of artifacts arising from parallel imaging are shown and ways to detect and mitigate these artifacts are described. Finally, several current applications of parallel imaging are presented and recent advancements and promising research in parallel imaging are briefly reviewed. PMID:22696125

  16. A Detailed Chemical Kinetic Model for TNT

    SciTech Connect

    Pitz, W J; Westbrook, C K

    2005-01-13

    A detailed chemical kinetic mechanism for 2,4,6-tri-nitrotoluene (TNT) has been developed to explore problems of explosive performance and soot formation during the destruction of munitions. The TNT mechanism treats only gas-phase reactions. Reactions for the decomposition of TNT and for the consumption of intermediate products formed from TNT are assembled based on information from the literature and on current understanding of aromatic chemistry. Thermodynamic properties of intermediate and radical species are estimated by group additivity. Reaction paths are developed based on similar paths for aromatic hydrocarbons. Reaction-rate constant expressions are estimated from the literature and from analogous reactions where the rate constants are available. The detailed reaction mechanism for TNT is added to existing reaction mechanisms for RDX and for hydrocarbons. Computed results show the effect of oxygen concentration on the amount of soot precursors that are formed in the combustion of RDX and TNT mixtures in N{sub 2}/O{sub 2} mixtures.

  17. Beyond conventional migration: non-linear elastic subsalt imaging with transmissions and two-sided illumination

    NASA Astrophysics Data System (ADS)

    Ravasi, Matteo; Vasconcelos, Ivan; Curtis, Andrew

    2014-08-01

    Source-receiver interferometric imaging can be used to synthesize a subsurface acoustic or elastic image, consisting of a zero-time, zero-offset response (or Green's function) between a colocated pseudo-source and pseudo-receiver placed at each point in the subsurface image. However, if the imaging process does not properly account for multiple reflections, and enclosing boundaries of sources and receivers are not available, the image shows artefacts, poorly illuminated areas and distorted image amplitudes. Here we demonstrate with numerical examples that two-sided non-linear imaging provides the best elastic pure-mode (PP and SS) and converted-mode (PS) images, having higher resolution and more uniform illumination than those obtained from both one-sided linear imaging and from other intermediate steps of imaging (e.g. non-linear one-sided, linear two-sided). We also propose practical approaches to construct the additional fields required by two-sided non-linear imaging without the need for a detailed velocity model and receivers (and/or sources) in the subsurface. Moreover, when conversions are used for imaging, `true-amplitude' images (here true-amplitude means properly retrieving amplitudes that represent the zero-time, zero-offset elastic response) should theoretically vanish because neither P-to-S or S-to-P conversions arise at zero-time and zero-offset. Applying a correction procedure that accounts for the polarity reversal in PS (or SP) single-shot images helps with their structural interpretation but results in an unphysical estimate of the subsurface response and uninterpretable amplitudes. This suggests that there are advantages in exploiting pure-mode SS reflections/transmissions, in addition to converted waves only, because they require no polarity correction and the resulting image contains meaningful amplitudes that are proportional to the local shear-wave properties of the medium.

  18. Detailed Mass Distribution in CL0024 from Strong Lensing

    NASA Astrophysics Data System (ADS)

    Kochanski, G. P.; dell'Antonio, I. P.; Tyson, J. A.

    1996-12-01

    Multiple strong lensing of a resolved source allows a unique high resolution reconstruction of the lensing mass. We present detailed mass models for CL0024, a rich cluster at z=0.39. A blue background galaxy (z=1.2-1.8) is imaged six times by the cluster. We model the cluster mass distribution as a superposition of resolved masses described by 121 parameters, and calculate chi-squared from a pixel-by-pixel comparison of the image to a model. We construct models based on elliptical mass distributions, rather than elliptical potentials that can lead to unphysical (negative) masses. This permits for the first time a separate measurement of mass associated with cluster galaxies and with the diffuse dark matter. The diffuse mass distribution inside 110 h(-1) kpc is consistent with an isothermal distribution with a smooth elliptical core. The half-density core size is 60h(-1) kpc, with an axial ratio of 1.6. We can rule out any significant mass substructure on scales larger than 15 h(-1) kpc in the central region. Mass traces light fairly well, out to at least 500 h(-1) kpc. We also present precise measurements of mass-to-light ratio vs radius, including diffuse intra-cluster light.

  19. Toward a detailed characterization of oil adsorbates as "solid liquids".

    PubMed

    Kutza, Claudia; Metz, Hendrik; Kutza, Johannes; Syrowatka, Frank; Mäder, Karsten

    2013-05-01

    Solid lipid formulation systems are used to overcome oral bioavailability problems of poorly water-soluble drugs. One promising process is the conversion of a liquid lipid system in a free flowing powder by use of adsorbing excipients. The aim of this study was the detailed characterization of solid-liquid interactions in oil adsorbed to Fujicalin and Neusilin which were manufactured by means of dual asymmetric centrifugation or conventional mortar/pestle blending. The adsorption strength of the excipients was investigated by Benchtop-NMR and ESR spectroscopy revealing the highest adsorption power for the Neusilin products. The adsorbate production methods as well as the storage of the excipients impact their adsorption properties. Environmental scanning electron microscopy (ESEM) and confocal laser scanning microscopy (CLSM) show that dual asymmetric centrifugation leads to a smoothing of the particle surface, whereas the mortar/pestle blending results in an uneven surface and particle destruction. The oil distribution at the particles is inhomogeneous for both production methods. The micropolarity of the adsorbed oil was investigated by ESR spectroscopy and multispectral fluorescence imaging. The adsorbing process on Neusilin leads to an increased micropolarity of the oil component. The release of the oil component in aqueous media could be verified by Benchtop-NMR and multispectral fluorescence imaging. PMID:23275113

  20. Place, Home, and Story in Environmental Education.

    ERIC Educational Resources Information Center

    Lutts, Ralph H.

    1985-01-01

    Offers perspectives on the environment as an expression of personal and cultural elements. Philosophically develops the concepts of home, place, and story. Also suggests that dimensions of historical interpretation, cultural ecology, and study of the future be included in environmental education programs. (ML)

  1. The hematopoietic stem cell in its place

    Microsoft Academic Search

    Gregor B Adams; David T Scadden

    2006-01-01

    A signature characteristic of stem cells is their ability to self-renew, affording a theoretically limitless ability to produce daughter cells and their descendents. This near-timeless dimension of stem cell function is not free of the constraints of place. The idea that highly specialized 'microenvironmental' cues participate in the regulation of stem cells has evidence in classic embryology and more recently

  2. Cyber War Will Not Take Place

    Microsoft Academic Search

    Thomas Rid

    2012-01-01

    For almost two decades, experts and defense establishments the world over have been predicting that cyber war is coming. But is it? This article argues in three steps that cyber war has never happened in the past, that cyber war does not take place in the present, and that it is unlikely that cyber war will occur in the future.

  3. Cyber War Will Not Take Place

    Microsoft Academic Search

    Thomas Rid

    2011-01-01

    For almost two decades, experts and defense establishments the world over have been predicting that cyber war is coming. But is it? This article argues in three steps that cyber war has never happened in the past, that cyber war does not take place in the present, and that it is unlikely that cyber war will occur in the future.

  4. The Importance of Place to Adult Learning.

    ERIC Educational Resources Information Center

    Fulton, Rodney D.

    The question of how important place is to learning is one that has fallen in and out of vogue during the past 40 years. Despite frequent statements of its importance, there has been a continual lack of attention to the physical environment of adult education. Under the leadership of John Becker, an architect from Cincinnati, the Adult Education…

  5. Is the place cell a "supple" engram?

    PubMed

    Routtenberg, Aryeh

    2015-06-01

    This short note, which honors Nobelists O'Keefe and the Mosers, asks how the patterning of inputs to a single place cell regulates its firing. Because the combination of inputs to a single CA1 place cell is very large, the generally accepted view is rejected that inputs to a place cell are relatively restricted, near identical repetition upon re-presentation of the environment. The alternative proposed here is that when any 100 excitatory inputs are fired activating a subset combination, which is a large number, selected from the 30,000 synapses, this leads to CA1 cell firing. The selection of the combination of inputs is a very large number it nonetheless leads to the conclusion that even though the same cell dutifully fires when the animal is in an identical location, the inputs that fire the place cell are nonetheless obligatorily non-identical. This CA1 input combinatorial proposal may help us understand the physiological underpinnings of the memory mechanism arising from supple synapses (Routtenberg (2013), Hippocampus 23:202-206). © 2015 Wiley Periodicals, Inc. PMID:25787962

  6. *PLACE OF STUDY School of Business

    E-print Network

    *PLACE OF STUDY School of Business and Social Sciences, Aarhus ANNUAL TUITION FEE EU at the borderline between economics and management, and their placement in international contexts. Large Bank, the EU and the OECD and a growing number of non-profit interest groups require sound economic

  7. Making School a Place of Peace.

    ERIC Educational Resources Information Center

    Bey, Theresa M.; Turner, Gwendolyn Y.

    This book was written for educators at all levels and individuals who are concerned about making schools safe, orderly places. It offers guidelines to promote and increase peace in the schools. The introductory chapter, "Moving toward a Peaceable School," endorses the national commitment to violence-free, peaceful, and productive schools, and…

  8. Department: Geography Prelim Field: Memory and Place

    E-print Network

    Wisconsin at Madison, University of

    , Rhys. "What time human geography." Progress in Human Geography 28, 3 (2004): 287-304. Kammen, Michael," Progress in Human Geography vol. 33, no. 3 (2004): 387-397 Nora, Pierre. "Between History and Memory: LesDepartment: Geography Prelim Field: Memory and Place Prelim Supervisor: William Cronon Exam

  9. Space Place: Make a Galactic Mobile!

    NSDL National Science Digital Library

    This module involves making a mobile of galaxies. Pattern and instructions are included. It introduces the different shapes of galaxies and their nomenclature. The Space Place is an educational NASA site for children and adults with activities and facts related to the exploration of space. Some activities are computer-interactive and many are real-world-interactive.

  10. Places to Stay Patient and Visitor Information

    E-print Network

    and family members. To make a reservation, please contact Travel Solutions at 614-750-4020 or toll free. Information is subject to change without notice. Hotel Name Address AAA Rating Amenities University Plaza Hotel and Conference Crowne Plaza Hotel Hyatt Place- Columbus OSU Holiday Inn Suites - OSU Best Western

  11. Venturing into Scary Places: The Minority Experience

    ERIC Educational Resources Information Center

    Bennett, Craig

    2007-01-01

    Students who have lived as part of a majority for their entire life may find it frightening to be asked to visit a place where they will be in the minority. In this article, the author uses this assignment to demonstrate to his students how some people feel everyday. The Minority Experience assignment challenges students to actively participate in…

  12. Achievement Place: The Teaching-Family Model

    ERIC Educational Resources Information Center

    Wolf, Montrose M.

    1976-01-01

    Describes the philosophy and work of Achievement Place, a community-based, family-style, group-home treatment program for 6 to 8 delinquents of predelinquents aged 12 through 15, administered by teaching parents; and how the program tries to establish through feedback, modeling, instruction, and support important societal behavioral competencies.…

  13. Women's Place, Revisited (NYT) 421 words

    E-print Network

    Lopez-Carr, David

    Women's Place, Revisited (NYT) 421 words Published: January 19, 2006 The election on Sunday of Michelle Bachelet as Chile's president completes a three- continent long jump for women in politics. Ms without rancor. These new chief executives are not the first women to lead major democracies. Margaret

  14. Engaging Places: Teacher Research. Final Report

    ERIC Educational Resources Information Center

    National Foundation for Educational Research, 2007

    2007-01-01

    The report was commissioned by the Department for Culture Media and Sport (DCMS) to provide quantitative and qualitative information on the perspectives of teachers, headteachers and governors, from the three pilot regions (London, the South East and Yorkshire and the Humber), towards using local buildings, places and spaces to support learning…

  15. THE PLACE OF NUISANCES IN THE LAW

    PubMed Central

    Feezer, Lester W.

    1916-01-01

    Mr. Feezer, a member of the bar, has been practicing health rather than law and through his association with the Massachusetts and New York State Departments of Health, is well qualified to interpret this difficult phase of the health problem. In this article he places nuisances in their proper position and explains the most effective methods with which to accomplish their abatement. PMID:18009482

  16. *PLACE OF STUDY ANNUAL TUITION FEE

    E-print Network

    studies, communication studies, internet studies, and other disciplines whereby digital media*PLACE OF STUDY Aarhus ANNUAL TUITION FEE EU/EEA/Swiss citizens: FREE Others: EUR 9,100 WWW Arts work with students to develop hands- on knowledge of how digital forms of communication and interaction

  17. Placing Fiber Optic Cables in Multioccupied Ducts

    Microsoft Academic Search

    P. Grimado; A. Colucci

    1986-01-01

    Placing fiber optic cable (FOC) in duct containing copper cable can save millions of construction dollars. This paper describes techniques used successfully in rodding duct over copper cables in actual field installations-a necessary and most critical step preparatory to the actual placement of the FOC. In addition, a mathematical model useful in planning and predicting expected FOC pulling tensions for

  18. Central place theory and sport tourism impacts

    Microsoft Academic Search

    Margaret J. Daniels

    2007-01-01

    Although sport tourism initiatives can boost a destination’s export base, not all communities have an equal likelihood of successfully hosting such an event. The purpose of this study is to use central place theory as a basis for understanding location features that influence the economic outcomes associated with hosting a sport event. The economic impacts generated by a tournament co-hosted

  19. Good Jobs--but Places for Women?

    ERIC Educational Resources Information Center

    O'Connor, Pat

    2015-01-01

    This article is concerned with men and women's experience of elite positions and with the extent to which such positions are seen as places for women, so as to provide an insight into their commitment to continuing in them. Senior management in universities are elite positions in terms of income; those who occupy them are relatively powerful…

  20. Video Games and the Pedagogy of Place

    ERIC Educational Resources Information Center

    Hutchison, David

    2007-01-01

    In this article the author explores the construction of place within virtual worlds and, in particular, in video games that appeal widely to children and youths. With the notable exception of "edutainment" titles, gaming and education have traditionally been viewed as separate pursuits. Yet, after school, millions of children and teens spend…

  1. Making Sense of Place: Sarah's Story

    ERIC Educational Resources Information Center

    James, Jennifer H.

    2008-01-01

    Written from the vantage point of both a mother and teacher educator, the author recounts the journey taken by Sarah, her 4-year old daughter, as she is introduced to and explores map making as a means of representing and making sense of familiar and unfamiliar places. Offering Sarah's experience as context, the author offers both a practical and…

  2. Viewing Places: Students as Visual Ethnographers

    ERIC Educational Resources Information Center

    Powell, Kimberly

    2010-01-01

    This article presents a micro-ethnographic study that took place during a summer research course for six undergraduate and four graduate students majoring in the disciplines of architecture, art education, geography, landscape architecture and an integrative arts program. The research sought to implement ethnographic, visual methods as a means to…

  3. library.syr.edu Spaces and Places

    E-print Network

    McConnell, Terry

    library.syr.edu #12;Spaces and Places Bird Library, the largest library on campus, welcomes over sciences, library administrative offices, the Special Collections Research Center, and the library café, Pages. Other library facilities include the Carnegie Library, the Geology Library in Heroy

  4. Place-based Mitigation of Climate Change

    E-print Network

    Place-based Mitigation of Climate Change Robert Socolow Princeton University socolow should provide at least one wedge. #12;"The Wedge Model is the iPod of climate change: You fill/yr, 30 miles per gallon b) Fly 10,000 miles/yr c) Heat home Natural gas, average house, average climate d

  5. In-Time On-Place Learning

    ERIC Educational Resources Information Center

    Bauters, Merja; Purma, Jukka; Leinonen, Teemu

    2014-01-01

    The aim of this short paper is to look at how mobile video recording devices could support learning related to physical practices or places and situations at work. This paper discusses particular kind of workplace learning, namely learning using short video clips that are related to physical environment and tasks preformed in situ. The paper…

  6. Who Places into Developmental Education and Why

    ERIC Educational Resources Information Center

    Pretlow, Joshua, III; Wathington, Heather D.

    2013-01-01

    Having garnered national attention, high failure rates in developmental education present a significant barrier to state and national policymakers' goals of increasing the percentage of adults who earn a college credential. However, a majority of the research fails to consider why students place into developmental education. This piece…

  7. Places to Go: Pedagogy in Action

    ERIC Educational Resources Information Center

    Downes, Stephen

    2008-01-01

    In this edition of Places to Go, Stephen Downes explores Pedagogy in Action, a Web site that seeks to provide pedagogical resources and support to educators in the field of scientific education. Managed by Carleton College, a small Midwestern liberal arts college, Pedagogy in Action, argues Downes, exemplifies what the Internet can do: increase…

  8. Detailed Cloud Patterns in Martian Northern Hemisphere

    NASA Technical Reports Server (NTRS)

    1998-01-01

    Cold and cloudy mornings; cool, hazy afternoons. High winds aloft and weather fronts moving slowly to the east. It is winter in the Martian northern hemisphere. One of the many reasons to study Mars is that, at times, its weather is very 'Earth-like.' At this time of the Martian year, clouds are abundant, especially in the morning and especially in the high northern latitudes. Clouds and fogs are also observed in low-lying areas farther to the south, in some lowlands they are as far south as the equator.

    The above color composite images, obtained by Mars Global Surveyor's camera on June 4, 1998, illustrate this Martian 'weather report.' Most of the thick, white clouds seen here occur north of latitude 35oN (roughly equivalent to Albuquerque NM, Memphis TN, and Charlotte, NC). Fog (seen as bright orange because it is lighter than the ground but some of the ground is still visible) occupies the lowest portions of the Kasei Valles outflow channel around 30oN and at 25oN.

    Several different types of cloud features are seen. The repetitious, wash-board pattern of parallel lines are 'gravity wave clouds'. These commonly form, in the lee--downwind side-- of topographic features such as mountain ranges (on Earth) or crater rims (on Mars), under very specific atmospheric conditions (low temperatures, high humidity, and high wind speeds). In this area, the wave clouds are lower in the atmosphere than some of the other clouds. These other clouds show attributes reflecting more the regional weather pattern, occasionally showing the characteristic 'slash' shape (southwest to northeast) of a weather front. These clouds probably contain mostly crystals of water ice but, depending on the temperature at high altitude (and more likely closer to the pole), some could also contain frozen carbon dioxide ('dry ice').

    MOC images 34501 (the red wide angle image) and 34502 (the blue wide angle image) were obtained on Mars Global Surveyor's 345th orbit about the planet. The pictures were taken around 5: 34 p.m. PDT on June 4, 1998. Winter in the northern hemisphere began in mid-February, 1998, and continues to mid-July, 1998.

    Malin Space Science Systems and the California Institute of Technology built the MOC using spare hardware from the Mars Observer mission. MSSS operates the camera from its facilities in San Diego, CA. The Jet Propulsion Laboratory's Mars Surveyor Operations Project operates the Mars Global Surveyor spacecraft with its industrial partner, Lockheed Martin Astronautics, from facilities in Pasadena, CA and Denver, CO.

  9. Stellar Imager

    NASA Technical Reports Server (NTRS)

    Carpenter, Kenneth

    2007-01-01

    The Stellar Imager (SI) is one of NASA's "Vision Missions" - concepts for future, space-based, strategic missions that could enormously increase our capabilities for observing the Cosmos. SI is designed as a UV/Optical Interferometer which will enable 0.1 milli-arcsecond (mas) spectral imaging of stellar surfaces and, via asteroseismology, stellar interiors and of the Universe in general. The ultra-sharp images of the Stellar Imager will revolutionize our view of many dynamic astrophysical processes by transforming point sources into extended sources, and snapshots into evolving views. SI, with a characteristic angular resolution of 0.1 milli-arcseconds at 2000 Angstroms, represents an advance in image detail of several hundred times over that provided by the Hubble Space Telescope. The Stellar Imager will zoom in on what today-with few exceptions - we only know as point sources, revealing processes never before seen, thus providing a tool as fundamental to astrophysics as the microscope is to the study of life on Earth. SI's science focuses on the role of magnetism in the Universe, particularly on magnetic activity on the surfaces of stars like the Sun. It's prime goal is to enable long-term forecasting of solar activity and the space weather that it drives, in support of the Living With a Star program in the Exploration Era. SI will also revolutionize our understanding of the formation of planetary systems, of the habitability and climatology of distant planets, and of many magneto-hydrodynamically controlled processes in the Universe. Stellar Imager is included as a "Flagship and Landmark Discovery Mission" in the 2005 Sun Solar System Connection (SSSC) Roadmap and as a candidate for a "Pathways to Life Observatory" in the Exploration of the Universe Division (EUD) Roadmap (May, 2005) and as such is a candidate mission for the 2025-2030 timeframe. An artist's drawing of the current "baseline" concept for SI is presented.

  10. Detail Enhancing Denoising of Digitized 3D Models from a Mobile

    E-print Network

    Abidi, Mongi A.

    Detail Enhancing Denoising of Digitized 3D Models from a Mobile Scanning System Imaging, Robotics. The developed algorithm can be useful for a variety of digitized 3D models, not just those involving mobile Abstract This research is focuses on enhancing the 3D models acquired by mobile scanning systems used

  11. Additional Technique Details: Multi-view Photometric Stereo with Spatially Varying Isotropic Materials

    E-print Network

    Tan, Ping

    Additional Technique Details: Multi-view Photometric Stereo with Spatially Varying Isotropic the BRDF from images with calibrated direc- tional lighting. We took this measurement as `ground truth' and compared our result with it. This experiment is eval- uated with another painted figurine shown

  12. Physically Grounded 3D Scene Interpretation with Detailed Object Models M. Zeeshan Zia1,3

    E-print Network

    , to allow for reasoning in a metric scene space. We establish the con- nection between the 3D geometric explore 3D scene reconstruction from a single view building on detailed 3D representations of object (compact, well-delineated objects and "stuff" such as walls, sky, ground) in 2D image space which is only

  13. A meaningful expansion around detailed balance

    E-print Network

    Matteo Colangeli; Christian Maes; Bram Wynants

    2011-01-18

    We consider Markovian dynamics modeling open mesoscopic systems which are driven away from detailed balance by a nonconservative force. A systematic expansion is obtained of the stationary distribution around an equilibrium reference, in orders of the nonequilibrium forcing. The first order around equilibrium has been known since the work of McLennan (1959), and involves the transient irreversible entropy flux. The expansion generalizes the McLennan formula to higher orders, complementing the entropy flux with the dynamical activity. The latter is more kinetic than thermodynamic and is a possible realization of Landauer's insight (1975) that, for nonequilibrium, the relative occupation of states also depends on the noise along possible escape routes. In that way nonlinear response around equilibrium can be meaningfully discussed in terms of two main quantities only, the entropy flux and the dynamical activity. The expansion makes mathematical sense as shown in the simplest cases from exponential ergodicity.

  14. Detailed fuel spray analysis techniques. Technical memo

    SciTech Connect

    Mularz, E.J.; Bosque, M.A.; Humenik, F.M.

    1983-01-01

    Detailed fuel spray analyses are a necessary input to the analytical modeling of the complex mixing and combustion processes which occur in advanced combustor systems. It is anticipated that by controlling fuel-air reaction conditions, combustor temperatures can be better controlled, leading to improved combustion system durability. Thus, a research program is underway to demonstrate the capability to measure liquid droplet size, velocity, and number density throughout a fuel spray and to utilize this measurement technique in laboratory benchmark experiments. The experiment to characterize fuel spray is described. These experiments and data should be useful for application to and validation of turbulent flow modeling to improve the design systems of future advanced technology engines.

  15. Detailed gravimetric geoid for the United States.

    NASA Technical Reports Server (NTRS)

    Strange, W. E.; Vincent, S. F.; Berry, R. H.; Marsh, J. G.

    1972-01-01

    A detailed gravimetric geoid was computed for the United States using a combination of satellite-derived spherical harmonic coefficients and 1 by 1 deg mean gravity values from surface gravimetry. Comparisons of this geoid with astrogeodetic geoid data indicate that a precision of plus or minus 2 meters has been obtained. Translations only were used to convert the NAD astrogeodetic geoid heights to geocentric astrogeodetic heights. On the basis of the agreement between the geocentric astrogeodetic geoid heights and the gravimetric geoid heights, no evidence is found for rotation in the North American datum. The value of the zero-order undulation can vary by 10 to 20 meters, depending on which investigator's station positions are used to establish it.

  16. Detailed structure within a tropical cyclone ``eye''

    NASA Astrophysics Data System (ADS)

    Teshiba, Michihiro; Fujita, Hiroshi; Hashiguchi, Hiroyuki; Shibagaki, Yoshiaki; Yamanaka, Manabu D.; Fukao, Shoichiro

    2005-12-01

    The characteristics of the ``eye'' and eyewall of a Tropical Cyclone (TC) are examined with a wind profiler and upper-soundings around a small island belonging to Japan. There are few observations of wind behavior in the eye of a TC with high time and height resolutions. In the eye of the TC, weak cyclonic wind and updraft formed like a cylinder centered on the TC. The updraft did not form clouds and precipitation because stable and relatively dry air existed in the middle troposphere. There were dry layers above the middle troposphere in the eye, especially in the lower layers on the front side of the TC. Therefore, the rainfall associated with the eyewall was strengthened and developed. This is the first time that the detailed wind behavior in the eye of the TC in the developing and mature stage has been observed.

  17. EVIDENCE FOR PHONETIC PROCESSING OF CUES TO PLACE OF ARTICULATION: PERCEIVED MANNER AFFECTS PERCEIVED PLACE

    E-print Network

    EVIDENCE FOR PHONETIC PROCESSING OF CUES TO PLACE OF ARTICULATION: PERCEIVED MANNER AFFECTS of place of articulation involves phonetic processing, and could not be purely auditory. It is clear of the system. and speech- specific phonetic or phonological mechanisms at the output end where segments

  18. "My Place": Exploring Children's Place-Related Identities through Reading and Writing

    ERIC Educational Resources Information Center

    Charlton, Emma; Cliff Hodges, Gabrielle; Pointon, Pam; Nikolajeva, Maria; Spring, Erin; Taylor, Liz; Wyse, Dominic

    2014-01-01

    This paper considers how children perceive and represent their placed-related identities through reading and writing. It reports on the findings of an 18-month interdisciplinary project, based at Cambridge University Faculty of Education, which aimed to consider children's place-related identities through their engagement with, and creation…

  19. Chord, Horizontal Tie Bar & Crossbracing Joint Details; Crossbracing Center ...

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

    Chord, Horizontal Tie Bar & Crossbracing Joint Details; Crossbracing Center Joint Detail; Chord, Panel Posts, Braces & Counterbrace Joint Detail - Brownsville Covered Bridge, Spanning East Fork Whitewater River (moved to Eagle Creek Park, Indianapolis), Brownsville, Union County, IN

  20. Photoacoustic imaging in biomedicine

    NASA Astrophysics Data System (ADS)

    Xu, Minghua; Wang, Lihong V.

    2006-04-01

    Photoacoustic imaging (also called optoacoustic or thermoacoustic imaging) has the potential to image animal or human organs, such as the breast and the brain, with simultaneous high contrast and high spatial resolution. This article provides an overview of the rapidly expanding field of photoacoustic imaging for biomedical applications. Imaging techniques, including depth profiling in layered media, scanning tomography with focused ultrasonic transducers, image forming with an acoustic lens, and computed tomography with unfocused transducers, are introduced. Special emphasis is placed on computed tomography, including reconstruction algorithms, spatial resolution, and related recent experiments. Promising biomedical applications are discussed throughout the text, including (1) tomographic imaging of the skin and other superficial organs by laser-induced photoacoustic microscopy, which offers the critical advantages, over current high-resolution optical imaging modalities, of deeper imaging depth and higher absorption contrasts, (2) breast cancer detection by near-infrared light or radio-frequency-wave-induced photoacoustic imaging, which has important potential for early detection, and (3) small animal imaging by laser-induced photoacoustic imaging, which measures unique optical absorption contrasts related to important biochemical information and provides better resolution in deep tissues than optical imaging.

  1. Image processing and recognition for biological images

    PubMed Central

    Uchida, Seiichi

    2013-01-01

    This paper reviews image processing and pattern recognition techniques, which will be useful to analyze bioimages. Although this paper does not provide their technical details, it will be possible to grasp their main tasks and typical tools to handle the tasks. Image processing is a large research area to improve the visibility of an input image and acquire some valuable information from it. As the main tasks of image processing, this paper introduces gray-level transformation, binarization, image filtering, image segmentation, visual object tracking, optical flow and image registration. Image pattern recognition is the technique to classify an input image into one of the predefined classes and also has a large research area. This paper overviews its two main modules, that is, feature extraction module and classification module. Throughout the paper, it will be emphasized that bioimage is a very difficult target for even state-of-the-art image processing and pattern recognition techniques due to noises, deformations, etc. This paper is expected to be one tutorial guide to bridge biology and image processing researchers for their further collaboration to tackle such a difficult target. PMID:23560739

  2. Geological Society of America 3300 Penrose Place

    E-print Network

    Foulger, G. R.

    Laboratory 252-21, Pasadena, California 91125, USA ABSTRACT Iceland is the best studied, large-volume, active volcanic region in the world. It features the largest subaerial exposure of any hotspot at a spreading with this attribution, at any more detailed level, the observations are poorly predicted by the plume hypothesis

  3. 11. Exterior detail view of northeast corner, showing stucco finish ...

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

    11. Exterior detail view of northeast corner, showing stucco finish and woodwork details - American Railway Express Company Freight Building, 1060 Northeast Division Street, Bend, Deschutes County, OR

  4. A&M. TAN607. Construction detail showing structural steel framework with reinforcing ...

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

    A&M. TAN-607. Construction detail showing structural steel framework with reinforcing steel in place prior to pouring concrete for biparting doors between hot shop and special equipment service (SES) room. Facing north. Hot shop to left, SES room to right. slot for north half of door shows at upper left of view. Date: May 21, 1954. INEEL negative no. 10548 - Idaho National Engineering Laboratory, Test Area North, Scoville, Butte County, ID

  5. Looking for Planets in all the Right Places

    NASA Astrophysics Data System (ADS)

    Di Stefano, Rosanne

    2012-05-01

    Gravitational lensing has the potential to discover planets in orbits of all sizes, orbiting both nearby and distant stars. Until recently, however, searches for planets via lensing have been conducted by programs best suited to finding only a subset of planetary lenses. During the past year several new approaches have been developed, including searches for small periodic signals near baseline, and monitoring nearby stars. By taking these approaches, we will extend our search for planets to *all* the right places, and will increase the discovery rate. In addition, the extended lensing searches will discover nearby planetary systems that can subsequently be observed using the full range of planet-study techniques, including transit and radial velocity studies as well as direct imaging. I will talk about the theory and also about preliminary results from our monitoring of the first predicted lensing event for evidence of planets orbiting the nearby dwarf star VB 10.

  6. Method for placing deep-brain stimulators

    NASA Astrophysics Data System (ADS)

    Nickele, Chris; Cetinkaya, Ebru; Fitzpatrick, J. Michael; Konrad, Peter E.

    2003-05-01

    A new system is evaluated for implanting deep-brain stimulators into the brain. The system relies on the custom construction of a rigid, one-piece mounting platform for each patient. During surgery the platform is attached rigidly to posts that are implanted into the patient's skull and extend outward through the scalp. The platform then acts as a miniature stereotactic frame that provides guidance for a catheter as it is advanced through a burr hole to the target. The target is selected on a pre-operative CT image. That image is acquired after the posts have been implanted and outfitted with fiducial markers. The positions of the markers and the target are used to design the platform. After initial implantation, the electrode's position is adjusted interoperatively on the basis of physical effects of stimulation, but the accuracy of the initial placement is determined entirely by the registration of the image to the physical anatomy through the shape of the platform and its placement on the posts. In this work, we test that accuracy by comparing the position of the electrode in post-operative patient images with the positions in the pre-operative images as determined by a rigid registration based on the fiducial markers.

  7. Smashing the Gadgets: Hindering Return-Oriented Programming Using In-Place Code Randomization

    E-print Network

    Yang, Junfeng

    Smashing the Gadgets: Hindering Return-Oriented Programming Using In-Place Code Randomization together small fragments of code, known as gadgets, that already exist in the process image of the vulnerable application. Each gadget ends with an indirect control transfer instruction, which transfers

  8. Burial at Srebrenica: linking place and trauma.

    PubMed

    Pollack, Craig Evan

    2003-02-01

    Five years after the massacre at Srebrenica in Bosnia-Herzegovina, survivors were faced with the decision: where did they want their loved ones buried? This report explores the reasons for their choice in qualitative interviews with 37 survivors of the massacre and 22 key informants performed over the summer 2000. Survivors wanted the loved ones buried at Potocari, a site just outside of Srebrenica, because it represented the site of ultimate horror, was connected to their sense of home, and underscored the various power relationships. The data points to the importance of place for health. Trauma, as it occurs in particular locations, breaks the sense of attachment to a particular place. Restoring the physical and social environment through burial and memorials mitigates the consequences of the trauma. The burial at Potocari provides a window into the mourning, politics, and recovery after mass violence. PMID:12560012

  9. Being there: the library as place*

    PubMed Central

    Weise, Frieda

    2004-01-01

    The value of the library as place is examined in this Janet Doe Lecture. The lecture, which is intended to focus on the history or philosophy of health sciences librarianship, presents an overview of the library as a place in society from ancient times to the present. The impact of information technology and changes in the methods of scholarly publication from print to digital are addressed as well as the role of the library as the repository of the written historical record of cultures. Functions and services of libraries are discussed in light of the physical library facility of the future. Finally, librarians are asked to remember the enduring values of librarianship in planning libraries of the future. PMID:14762459

  10. Space Place Live! with Donya Douglas

    NSDL National Science Digital Library

    2005-09-26

    In this episode of the Space Place Web site talk show, thermal engineer Donya Douglas of NASA's Goddard Space Flight Center talks about her job in designing ways to keep the three tiny Space Technology 5 spacecraft at the right operating temperature in space, without adding much to their mass or need for electrical power. Cartoon characters present their own 6-7 minute talk show live from the Space Place Clubhouse. The show presents space program scientists and engineers as role models for kids and encourages them to pursue their dreams. In each episode, the guest presents a short science or technology concept, and also talks about their job, their hobbies, and how they got interested in a career in science or engineering.

  11. Visualized numerical assessment for near infrared diffuse optical tomography with contrast-and-size detail analysis

    NASA Astrophysics Data System (ADS)

    Chen, Liang-Yu; Pan, Min-Cheng; Pan, Min-Chun

    2013-01-01

    The purpose of this study is to propose an objective contrast-and-size detail (CSD) analysis for near infrared diffuse optical tomography (NIR DOT), of which the concept is derived from the subjective contrast detail (CD) analysis. We define a measure for numerical CSD analysis based on the resolution estimation of contrast and size. Following that, the contrast-and-size map of resolution can be calculated and displayed for each corresponding image in the map; furthermore, a CSD resolution curve can be plotted by calculating the average value of the projection corresponding to the physical quantity/axis (size or contrast). To provide some worked examples about the proposed CSD analysis evaluating the imaging performance of different reconstruction methods, Tikhonov regularization and edge-preserving regularization with different weighting functions were employed. Results suggested that using edge-preserving regularization with the generalized Lorentzian weighting function is the most attractive for the estimation of absorption-coefficient images.

  12. Spirit of place: Bridging the 'epistemological gap'

    NASA Astrophysics Data System (ADS)

    Dudley, Nickola B. N.

    My work explores the psychological gap between humans and nature. Also how humanity is a parcel of nature and that the philosophy of spirit of place can create oneness through imagery, describing the landscape while also encompassing the 'larger frame' within the aesthetic. These transcendental moments connect with not only the landscape but to earth as a spiritual entity. My work is a response to the landscape and these moments.

  13. The Young Men of Marram Place

    ERIC Educational Resources Information Center

    Johnston, Diana Armatage

    2010-01-01

    Bucky is 29 years old. Jesse is 27 is years old. Paul is 23 years old. They have lived together at Marram Place, a four-bedroom house, for over a year and have become best friends. Each works 20 hours per week in the community for his own spending money. After work, the guys walk, swim, work on computers, help with the housework, deliver a…

  14. Improved Cure-in-Place Silicone Adhesives

    NASA Technical Reports Server (NTRS)

    Blevins, C. E.; Sweet, J.; Gonzalez, R.

    1982-01-01

    Two improved cure-in-place silicone-elastomer-based adhesives have low thermal expansion and low thermal conductivity. Adhesives are flexible at low temperature and withstand high temperatures without disintegrating. New ablative compounds were initially developed for in-flight repair of insulating tile on Space Shuttle orbiter. Could find use in other applications requiring high-performance adhesives, such as sealants for solar collectors.

  15. Placing Calls with iPhone

    Microsoft Academic Search

    Steve Sande; Erica Sadun

    \\u000a iPhones are versatile devices. They can surf the Web, check the latest stock prices, request a weather report, play thousands\\u000a of games, and map out directions. But at its core, the iPhone remains a cell phone, which means that making phone calls is\\u000a its primary function. In this chapter, you’ll learn the essential things you need to know to place

  16. Holding Cargo in Place With Foam

    NASA Technical Reports Server (NTRS)

    Fisher, T. T.

    1985-01-01

    Foam fills entire container to protect cargo from shock and vibration. Originally developed for stowing space debris and spent satellites in Space Shuttle for return to Earth, encapsulation concept suitable for preparing shipments carried by truck, boat, or airplane. Equipment automatically injects polyurethane foam into its interior to hold cargo securely in place. Container of rectangular or other cross section built to match shape of vehicle used.

  17. The spirit of place of Bhaktapur, Nepal

    E-print Network

    Silva, Kapila Dharmasena

    2015-04-07

    place….This means controlling pollution – air, water, noise – and the change of the visual environment’ (UNESCO Kathmandu Office 2007a, 7). This definition seems to fall into the materialist perspective of authenticity, neglecting the nascent.... There is no air or noise pollution, like in Kathmandu. Also, it is not crowded or congested with people and cars. People are friendly and helpful. And, above all, this is my birthplace. So, I have no intention of leaving Bhaktapur. The following response from a...

  18. Importance of computed radiography image display parameters in orthopedic imaging

    NASA Astrophysics Data System (ADS)

    Huda, Walter; Montgomery, W. J.; Arreola, Manuel; Hoyle, Beverly A.; Bush, C. H.

    1993-06-01

    In this study, we used a DuPont Linx CR system to generate film images of the AP & lateral views of a foot phantom. Images were printed using a 2 on 1 CR image output format. Image display parameters for one of these two images was varied in a systematic fashion while the second image remained at the constant default settings recommended by the manufacturer. Twelve radiologists evaluated the relative image quality of each pair of images for four anatomic areas: osseous detail in the fore foot, mid foot and hind foot, and soft tissue detail. The resultant data were analyzed to investigate the influence of the display parameters on radiologist preference. The results of this study demonstrate that significant improvements are achievable for the CR display parameters when compared to the default values. This improvement in radiologist preference depends on the anatomical regions under consideration.

  19. In-place filter testing summary

    SciTech Connect

    Ortiz, J.P.; Garcia, E.D.; Ortega, J.M.

    1988-03-01

    The most common method of identifying particle penetration through a filter or adsorber system is through the performance of a periodic penetration test, i.e., in-place test or leak test using an aerosol or gas vapor to challenge the filter or adsorber system. The aerosol is usually formed by vaporization of a liquid, di-2(ethelhexyl sebacate) (DEHS), and allowed to condense to form liquid particles of a certain size and distribution. The gas vapor is formed by vaporization of Freon 11 liquid. The periodic penetration test, although conducted annually, can and has been demonstrated to show the beginning degradation of a filter or adsorber system. Other evidence of penetration can include detection of radiation downstream of the filter system or the existence of an unusually low pressure drop across the filter, i.e., torn filter, etc. However, these kinds of occurrences show up instantaneously and could release radioactive material to the atmosphere before the systems could be shut down. When a filter system fails the in--place test or is showing evidence of.filter or component degradation, corrective measures are put into place in order to return,the system back to its best operating condition. This report presents a summary of all filter tests.

  20. Aging in Place in a Retirement Community: 90+ Year Olds

    PubMed Central

    Paganini-Hill, Annlia

    2014-01-01

    Aging in place, an image of growing old in one’s home and maintaining one’s daily routine, is desired by most older adults. To identify variables promoting such independent living in the oldest-old, we examined the association between living situation of a population-based cohort of 90+ year olds with health and lifestyle variables. Of 1485 participants, 53% still lived in their home at a retirement community designed to foster wellness. Those living at home tended to be healthier, with smaller proportions having chronic diseases or hospitalizations in the preceding year and a greater proportion having normal functional ability. Dementia was the chronic disease most significantly related to living situation. In addition to not having dementia, not using a wheelchair or bath aid, receiving meals on wheels, and being married were jointly related to living at home. With the help of family and friends and with a medical and social support system, many 90+ year olds can age in place. This is often because they have a caregiving spouse or paid caregiver. PMID:25288828

  1. Detailed Chemical Kinetic Modeling of Cyclohexane Oxidation

    SciTech Connect

    Silke, E J; Pitz, W J; Westbrook, C K; Ribaucour, M

    2006-11-10

    A detailed chemical kinetic mechanism has been developed and used to study the oxidation of cyclohexane at both low and high temperatures. Reaction rate constant rules are developed for the low temperature combustion of cyclohexane. These rules can be used for in chemical kinetic mechanisms for other cycloalkanes. Since cyclohexane produces only one type of cyclohexyl radical, much of the low temperature chemistry of cyclohexane is described in terms of one potential energy diagram showing the reaction of cyclohexyl radical + O{sub 2} through five, six and seven membered ring transition states. The direct elimination of cyclohexene and HO{sub 2} from RO{sub 2} is included in the treatment using a modified rate constant of Cavallotti et al. Published and unpublished data from the Lille rapid compression machine, as well as jet-stirred reactor data are used to validate the mechanism. The effect of heat loss is included in the simulations, an improvement on previous studies on cyclohexane. Calculations indicated that the production of 1,2-epoxycyclohexane observed in the experiments can not be simulated based on the current understanding of low temperature chemistry. Possible 'alternative' H-atom isomerizations leading to different products from the parent O{sub 2}QOOH radical were included in the low temperature chemical kinetic mechanism and were found to play a significant role.

  2. Parabiosis in mice: a detailed protocol.

    PubMed

    Kamran, Paniz; Sereti, Konstantina-Ioanna; Zhao, Peng; Ali, Shah R; Weissman, Irving L; Ardehali, Reza

    2013-01-01

    Parabiosis is a surgical union of two organisms allowing sharing of the blood circulation. Attaching the skin of two animals promotes formation of microvasculature at the site of inflammation. Parabiotic partners share their circulating antigens and thus are free of adverse immune reaction. First described by Paul Bert in 1864(1), the parabiosis surgery was refined by Bunster and Meyer in 1933 to improve animal survival(2). In the current protocol, two mice are surgically joined following a modification of the Bunster and Meyer technique. Animals are connected through the elbow and knee joints followed by attachment of the skin allowing firm support that prevents strain on the sutured skin. Herein, we describe in detail the parabiotic joining of a ubiquitous GFP expressing mouse to a wild type (WT) mouse. Two weeks after the procedure, the pair is separated and GFP positive cells can be detected by flow cytometric analysis in the blood circulation of the WT mouse. The blood chimerism allows one to examine the contribution of the circulating cells from one animal in the other. PMID:24145664

  3. Murky details of the Miocene Atlantic Ocean

    NASA Astrophysics Data System (ADS)

    Herold, N. K.; Huber, M.; Shevenell, A.; Müller, D.

    2013-12-01

    We examine Atlantic Ocean circulation during the Miocene based on published modelling and data. It has long been recognised that the Atlantic Ocean played a key role in climate changes throughout the Quaternary and determining whether this was the case earlier in the Cenozoic may be important for understanding the details of Miocene climate evolution. Current geochemical, sedimentological and micropaleontologic evidence allows for multiple interpretations of deep water activity, which is further hampered by a lack of precise dating of ocean gateway closures. Previous ocean modelling studies have shown strong increases in deep water formation due to closure of the Panama gateway but have disagreed on the oceanographic importance of the Tethys gateway and bathymetry of the far North Atlantic. This combination of ambiguous data and conflicting modelling results leaves the current state of knowledge of the Miocene ocean lacking. We propose several avenues of research to improve our knowledge of the Miocene Atlantic Ocean, which will ultimately improve our understanding of its response to climate change and vice versa.

  4. The purchasable chemical space: a detailed picture.

    PubMed

    Lucas, Xavier; Grüning, Björn A; Bleher, Stefan; Günther, Stefan

    2015-05-26

    The screening of a reduced yet diverse and synthesizable region of the chemical space is a critical step in drug discovery. The ZINC database is nowadays routinely used to freely access and screen millions of commercially available compounds. We collected ?125 million compounds from chemical catalogs and the ZINC database, yielding more than 68 million unique molecules, including a large portion of described natural products (NPs) and drugs. The data set was filtered using advanced medicinal chemistry rules to remove potentially toxic, promiscuous, metabolically labile, or reactive compounds. We studied the physicochemical properties of this compilation and identified millions of NP-like, fragment-like, inhibitors of protein-protein interactions (i-PPIs) like, and drug-like compounds. The related focused libraries were subjected to a detailed scaffold diversity analysis and compared to reference NPs and marketed drugs. This study revealed thousands of diverse chemotypes with distinct representations of building block combinations among the data sets. An analysis of the stereogenic and shape complexity properties of the libraries also showed that they present well-defined levels of complexity, following the tendency: i-PPIs-like < drug-like < fragment-like < NP-like. As the collected compounds have huge interest in drug discovery and particularly virtual screening and library design, we offer a freely available collection comprising over 37 million molecules under: http://pbox.pharmaceutical-bioinformatics.org , as well as the filtering rules used to build the focused libraries described herein. PMID:25894297

  5. Optoelectronic pH Meter: Further Details

    NASA Technical Reports Server (NTRS)

    Jeevarajan, Antony S.; Anderson, Mejody M.; Macatangay, Ariel V.

    2009-01-01

    A collection of documents provides further detailed information about an optoelectronic instrument that measures the pH of an aqueous cell-culture medium to within 0.1 unit in the range from 6.5 to 7.5. The instrument at an earlier stage of development was reported in Optoelectronic Instrument Monitors pH in a Culture Medium (MSC-23107), NASA Tech Briefs, Vol. 28, No. 9 (September 2004), page 4a. To recapitulate: The instrument includes a quartz cuvette through which the medium flows as it is circulated through a bioreactor. The medium contains some phenol red, which is an organic pH-indicator dye. The cuvette sits between a light source and a photodetector. [The light source in the earlier version comprised red (625 nm) and green (558 nm) light-emitting diodes (LEDs); the light source in the present version comprises a single green- (560 nm)-or-red (623 nm) LED.] The red and green are repeatedly flashed in alternation. The responses of the photodiode to the green and red are processed electronically to obtain the ratio between the amounts of green and red light transmitted through the medium. The optical absorbance of the phenol red in the green light varies as a known function of pH. Hence, the pH of the medium can be calculated from the aforesaid ratio.

  6. A detailed comparison of backpropagation neural network and maximum-likelihood classifiers for urban land use classification

    Microsoft Academic Search

    Justin D. Paola; Robert A. Schowengerdt

    1995-01-01

    A detailed comparison of the backpropagation neural network and maximum-likelihood classifiers for urban land use classification is presented. Landsat Thematic Mapper images of Tucson, Arizona, and Oakland, California, were used for this comparison. For the Tucson image, the percentage of matching pixels in the two classification maps was only 64.5%, while for the Oakland image it was 83.3%. Although the

  7. Observe one place at many scales

    NSDL National Science Digital Library

    NASA/Goddard Space Flight Center Scientific Visualization Studio

    An animation that introduces scale with scalable views of the capitol building in Atlanta, Georgia. Scenes can be portrayed from distances of 0.1 to 10,000 miles. Six images accompany the animation and freeze views at 0.1, 1, 10, 100, 1000, and 10,000 miles above the capitol. It would be more helpful if the bar scale in images accompanying the animation were consistently left at the same size. The Flash animation can be paused and rewound to stress important points.

  8. Wavelet Based Image Denoising Using Multi-Spinning

    Microsoft Academic Search

    B. N. Aravind; K. V. Suresh

    2011-01-01

    The problem of reconstructing digital images from degraded measurement is regarded as a problem of importance in various fields of engineering and imaging sciences. The main goal of denoising is to restore a noisy image to produce visually high quality image. In general, image denoising imposes a compromise between noise reduction and preserving significant image details. In this paper we

  9. Using Imaging Methods to Interrogate Radiation-Induced Cell Signaling

    SciTech Connect

    Shankaran, Harish; Weber, Thomas J.; Freiin von Neubeck, Claere H.; Sowa, Marianne B.

    2012-04-01

    There is increasing emphasis on the use of systems biology approaches to define radiation induced responses in cells and tissues. Such approaches frequently rely on global screening using various high throughput 'omics' platforms. Although these methods are ideal for obtaining an unbiased overview of cellular responses, they often cannot reflect the inherent heterogeneity of the system or provide detailed spatial information. Additionally, performing such studies with multiple sampling time points can be prohibitively expensive. Imaging provides a complementary method with high spatial and temporal resolution capable of following the dynamics of signaling processes. In this review, we utilize specific examples to illustrate how imaging approaches have furthered our understanding of radiation induced cellular signaling. Particular emphasis is placed on protein co-localization, and oscillatory and transient signaling dynamics.

  10. Eternal work place change: Chaplains' response.

    PubMed

    Damore, Deborah R; O'Connor, John A; Hammons, Debby

    2004-01-01

    A detailed chronology of a unique response to organizational change is explored and discussed through the example of the Chaplaincy Staff Support Service at Hamilton Health Sciences. Highlighted are the corporate and staff benefits of using chaplains' skills, training and existing roles in hospital life. A summary of the specific methodologies are provided to clarify the theoretical discussion. It is concluded that this is a fiscally efficient means of supporting staff to live out the highest organizational principles in difficult times. PMID:15328459

  11. There's no place like home: Earth

    NSDL National Science Digital Library

    2010-12-10

    This news story from NASA's Eyes on the Earth website highlights three short videos: "Majestic Planet," "Earth: The Water Planet," and "Frozen Earth." In these videos, images of the earth taken from satellites and space stations are accompanied by music, visualizations, and informational text.

  12. Panel Post & Diagonal Brace Joint Detail; Crossbracing Center Joint ...

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

    Panel Post & Diagonal Brace Joint Detail; Crossbracing Center Joint Detail; Chord, Panel Post, Tie Bar, & Diagonal Brace Joint Detail; Chord, Tie Bar, & Crossbracing Joint Detail - Medora Bridge, Spanning East Fork of White River at State Route 235, Medora, Jackson County, IN

  13. Ancillary-service details: Dynamic scheduling

    SciTech Connect

    Hirst, E.; Kirby, B.

    1997-01-01

    Dynamic scheduling (DS) is the electronic transfer from one control area to another of the time-varying electricity consumption associated with a load or the time-varying electricity production associated with a generator. Although electric utilities have been using this technique for at least two decades, its use is growing in popularity and importance. This growth is a consequence of the major changes under way in US bulk-power markets, in particular efforts to unbundle generation from transmission and to increase competition among generation providers. DS can promote competition and increase choices. It allows consumers to purchase certain services from entities outside their physical-host area and it allows generators to sell certain services to entities other than their physical host. These services include regulation (following minute-to-minute variations in load) and operating reserves, among others. Such an increase in the number of possible suppliers and customers should encourage innovation and reduce the costs and prices of providing electricity services. The purpose of the project reported here was to collect and analyze data on utility experiences with DS. Chapter 2 provides additional details and examples of the definitions of DS. Chapter 3 explains why DS might be an attractive service that customers and generators, as well as transmission providers, might wan to use. Chapter 4 presents some of the many current DS examples the authors uncovered in their interviews. Chapter 5 discusses the costs and cost-effectiveness of DS. Chapter 6 explains what they believe can and cannot be electronically moved from one control area to another, primarily in terms of the six ancillary services that FERC defined in Order 888. Chapter 7 discusses the need for additional research on DS.

  14. Local detailed balance: a microscopic derivation

    NASA Astrophysics Data System (ADS)

    Bauer, M.; Cornu, F.

    2015-01-01

    Thermal contact is the archetype of non-equilibrium processes driven by constant non-equilibrium constraints when the latter are enforced by reservoirs exchanging conserved microscopic quantities. At a mesoscopic scale only the energies of the macroscopic bodies are accessible together with the configurations of the contact system. We consider a class of models where the contact system, as well as macroscopic bodies, have a finite number of possible configurations. The global system, with only discrete degrees of freedom, has no microscopic Hamiltonian dynamics, but it is shown that, if the microscopic dynamics is assumed to be deterministic and ergodic and to conserve energy according to some specific pattern, and if the mesoscopic evolution of the global system is approximated by a Markov process as closely as possible, then the mesoscopic transition rates obey three constraints. In the limit where macroscopic bodies can be considered as reservoirs at thermodynamic equilibrium (but with different intensive parameters), the mesoscopic transition rates turn into transition rates for the contact system and the third constraint becomes local detailed balance; the latter is generically expressed in terms of the microscopic exchange entropy variation, namely the opposite of the variation of the thermodynamic entropy of the reservoir involved in a given microscopic jump of the contact system configuration. For a finite-time evolution after contact has been switched on, we derive a fluctuation relation for the joint probability of the heat amounts received from the various reservoirs. The generalization to systems exchanging energy, volume and matter with several reservoirs, with a possible conservative external force acting on the contact system, is given explicitly.

  15. Probability Models for Clutter in Natural Images

    E-print Network

    Srivastava, Anuj

    . Perhaps suitable for low-level image processing, these models are inadequate for high-level tasks such as object recognition, tracking, and image understanding. High-level image understanding requires detailed.) extracted from a training set of its collected images. There are two approaches to reconciling low- and high

  16. [Wavelet threshold denoising algorithm for CR images].

    PubMed

    Li, Yong-hui; Zhou, He-qin

    2006-01-01

    A wavelet threshold denoising algorithm for CR images is put forward here . A noised CR image is decomposed into wavelet coefficients, which are processed by the algorithm, and the denoised CR image is reconstructed based on the processed coefficients. Examples are too presented to demonstrate the efficiency of the algorithm on denoising and, maintaining the detail of the CR images. PMID:16646417

  17. [The place of alcohol in hospital meals].

    PubMed

    Menecier, Pascal; Broyer, Nathalie; Flot-Arnould, Laurent; Ploton, Louis

    2011-09-01

    Wine and other types of alcohol are generally seen as an important part of French tradition. A study was carried out at Mâcon hospital to reflect on the place of alcohol in meals served on short stay medical-surgical wards. The results show that the consumption of wine, which was already modest ten years ago, had almost disappeared by 2010, without the offer having been restricted. It would seem that it is possible to be hospitalised for a few days without drinking wine. PMID:22003785

  18. Space Place: Make Asteroids You Can Eat

    NSDL National Science Digital Library

    NASA JPL

    This hands-on, food preparation activity is designed to familiarize children with asteroids: what they are, where they orbit, how they formed, what they look like (making mashed potato mixture look like an asteroid), and why we care about them. Introduces NASA's Deep Space 1 mission that flew very close to Asteroid Braille. The Space Place is an educational NASA site for children and adults with activities and facts related to the exploration of space—past, current, and future. Some activities are computer-interactive and many are real-world-interactive.

  19. The Best Places to Live 2000

    NSDL National Science Digital Library

    Money magazine has changed its annual Best Places to live rankings yet again. Two years ago the magazine broke down their list by size within geographical area. Now the editors have simply picked two national winners and four runners up and created an interactive tool that allows users to select from 63 factors (or a nine category quick search) and find their own city to love. The magazine explains it top choices with several paragraphs and a statistical snapshot for each city. Visitors can also use the site to compare the cost of living between any two US cities.

  20. The Coldest Place in Ireland "The coldest place in Ireland" is the title of this year's winning

    E-print Network

    Schellekens, Michel P.

    The Coldest Place in Ireland "The coldest place in Ireland in Ireland" refers to the Quantum Optics Laboratory in the Tyndall National Institute which also happens to be the coldest place in Ireland. Laura explained

  1. Interpretation of HRTEM images by image simulation: An introduction to theory and practice

    SciTech Connect

    O`Keefe, M.A.

    1994-08-01

    This tutorial describes the use of image simulation as an aid to interpretation of high-resolution transmission electron microscope images. Topics include some image processing as well as image simulation. Image processing is the manipulation of experimental images in order to extract some desired information. Image simulation is the generation of a computed or simulated image from a model structure. It requires a detailed knowledge of the process of image formation in the high-resolution transmission electron microscope. This tutorial concentrates on image simulation, with examples of image processing appearing only as required as illustrations. Because this is an introduction, the theory of image simulation is described, but not explored in depth. The practice of image simulation is covered in sufficient detail to enable the student to understand the functions of the various steps in the computations, and the parameters necessary for their evaluation.

  2. Imaging Borrelly

    USGS Publications Warehouse

    Soderblom, L.A.; Boice, D.C.; Britt, D.T.; Brown, R.H.; Buratti, B.J.; Kirk, R.L.; Lee, M.; Nelson, R.M.; Oberst, J.; Sandel, B.R.; Stern, S.A.; Thomas, N.; Yelle, R.V.

    2004-01-01

    The nucleus, coma, and dust jets of short-period Comet 19P/Borrelly were imaged from the Deep Space 1 spacecraft during its close flyby in September 2001. A prominent jet dominated the near-nucleus coma and emanated roughly normal to the long axis of nucleus from a broad central cavity. We show it to have remained fixed in position for more than 34 hr, much longer than the 26-hr rotation period. This confirms earlier suggestions that it is co-aligned with the rotation axis. From a combination of fitting the nucleus light curve from approach images and the nucleus' orientation from stereo images at encounter, we conclude that the sense of rotation is right-handed around the main jet vector. The inferred rotation pole is approximately perpendicular to the long axis of the nucleus, consistent with a simple rotational state. Lacking an existing IAU comet-specific convention but applying a convention provisionally adopted for asteroids, we label this the north pole. This places the sub-solar latitude at ???60?? N at the time of the perihelion with the north pole in constant sunlight and thus receiving maximum average insolation. ?? 2003 Elsevier Inc. All rights reserved.

  3. Using Photoshop with images created by a confocal system.

    PubMed

    Sedgewick, Jerry

    2014-01-01

    Many pure colors and grayscales tones that result from confocal imaging are not reproducible to output devices, such as printing presses, laptop projectors, and laser jet printers. Part of the difficulty in predicting the colors and tones that will reproduce lies in both the computer display, and in the display of unreproducible colors chosen for fluorophores. The use of a grayscale display for confocal channels and a LUT display to show saturated (clipped) tonal values aids visualization in the former instance and image integrity in the latter. Computer monitors used for post-processing in order to conform the image to the output device can be placed in darkened rooms, and the gamma for the display can be set to create darker shadow regions, and to control the display of color. These conditions aid in visualization of images so that blacks are set to grayer values that are more amenable to faithful reproduction. Preferences can be set in Photoshop for consistent display of colors, along with other settings to optimize use of memory. The Info window is opened so that tonal information can be shown via readouts. Images that are saved as indexed color are converted to grayscale or RGB Color, 16-bit is converted to 8-bit when desired, and colorized images from confocal software is returned to grayscale and re-colorized according to presented methods so that reproducible colors are made. Images may also be sharpened and noise may be reduced, or more than one image layered to show colocalization according to specific methods. Images are then converted to CMYK (Cyan, Magenta, Yellow and Black) for consequent assignment of pigment percentages for printing presses. Changes to single images and multiple images from image stacks are automated for efficient and consistent image processing changes. Some additional changes are done to those images destined for 3D visualization to better separate regions of interest from background. Files are returned to image stacks, saved and then printed to best reveal colors, contrast, details and features. PMID:24052348

  4. Signals and Images Image processing

    E-print Network

    Lakey, Joseph D.

    Signals and Images Wavelets Image processing Models and Approximations Data driven approximations;Signals and Images Wavelets Image processing Models and Approximations Data driven approximations or transcendental: Joe Lakey Wavelets Minimize Max #12;Signals and Images Wavelets Image processing Models

  5. Location Matters: The Rhetoric of Place in Protest

    ERIC Educational Resources Information Center

    Endres, Danielle; Senda-Cook, Samantha

    2011-01-01

    Social movements often deploy place rhetorically in their protests. The rhetorical performance and (re)construction of places in protest can function in line with the goals of a social movement. Our essay offers a heuristic framework--place in protest--for theorizing the rhetorical force of place and its relationship to social movements. Through…

  6. Imaging of angiomyolipomas

    Microsoft Academic Search

    Laurent Lemaitre; M Claudon; F Dubrulle; E Mazeman

    1997-01-01

    In this article we review renal angiomyolipomas (AMLs) from cases in the world literature and 60 cases from our own institution. We also analyze the role and the place of the various imaging techniques in the detection and diagnosis of AMLs. Discussion is focused on the natural history of this benign neoplasm as an isolated form or as a part

  7. EBSD Images Theoretical Background

    E-print Network

    Candea, George

    . Michel Rappaz EBSD images of the welding microstructure in the transverse direction were acquired of the grains is due to the preferential growth in the direction of the thermal gradient. Figure 4 Complete EBSD procedure takes place in the solid state since the melted metal is already solidified when the quenching

  8. Common data elements in radiologic imaging of traumatic brain injury.

    PubMed

    Haacke, E Mark; Duhaime, Ann Christine; Gean, Alisa D; Riedy, Gerard; Wintermark, Max; Mukherjee, Pratik; Brody, David L; DeGraba, Thomas; Duncan, Timothy D; Elovic, Elie; Hurley, Robin; Latour, Lawrence; Smirniotopoulos, James G; Smith, Douglas H

    2010-09-01

    Traumatic brain injury (TBI) has a poorly understood pathology. Patients suffer from a variety of physical and cognitive effects that worsen as the type of trauma worsens. Some noninvasive insights into the pathophysiology of TBI are possible using magnetic resonance imaging (MRI), computed tomography (CT), and many other forms of imaging as well. A recent workshop was convened to evaluate the common data elements (CDEs) that cut across the imaging field and given the charge to review the contributions of the various imaging modalities to TBI and to prepare an overview of the various clinical manifestations of TBI and their interpretation. Technical details regarding state-of-the-art protocols for both MRI and CT are also presented with the hope of guiding current and future research efforts as to what is possible in the field. Stress was also placed on the potential to create a database of CDEs as a means to best record information from a given patient from the reading of the images. PMID:20815050

  9. The place of IVF in infertility care.

    PubMed

    Stephenson, Patricia A; Wagner, Marsden G

    1991-12-01

    In vitro fertilization has become standard treatment for infertility without the benefit of thorough evaluation. Today, the effectiveness of IVF is the subject of ongoing debate, the medical and non-medical risks of treatment are not adequately understood, and there is great concern about the true costs of care both for individuals and society. Added to this debate are ethical dilemmas which have changed the way we think about reproductive rights, the family, parenthood, intergenerational responsibilities, and the legal status of children and embryos. In order to address these issues, the World Health Organization Regional Office for Europe held a meeting in June 1990 on the Place of In Vitro Fertilization in Infertility Care. The recommendations from the meeting are presented. PMID:11651137

  10. Nuclear spin noise imaging.

    PubMed

    Müller, Norbert; Jerschow, Alexej

    2006-05-01

    NMR images were obtained from the proton spin noise signals of a water-containing phantom, which was placed in the highly tuned, low-noise resonant circuit of a cryogenically cooled NMR probe in the presence of systematically varied magnetic field gradients. The spatially resolved proton spin density was obtained from the raw signal by a modified projection-reconstruction protocol. Although spin noise imaging is inherently less sensitive than conventional magnetic resonance imaging, it affords an entirely noninvasive visualization of the interior of opaque objects or subjects. Thus, tomography becomes possible even when neither x-ray nor radio frequency radiation can be applied for technical or safety reasons. PMID:16636281

  11. Placing late Neanderthals in a climatic context.

    PubMed

    Tzedakis, P C; Hughen, K A; Cacho, I; Harvati, K

    2007-09-13

    Attempts to place Palaeolithic finds within a precise climatic framework are complicated by both uncertainty over the radiocarbon calibration beyond about 21,500 14C years bp and the absence of a master calendar chronology for climate events from reference archives such as Greenland ice cores or speleothems. Here we present an alternative approach, in which 14C dates of interest are mapped directly onto the palaeoclimate record of the Cariaco Basin by means of its 14C series, circumventing calendar age model and correlation uncertainties, and placing dated events in the millennial-scale climate context of the last glacial period. This is applied to different sets of dates from levels with Mousterian artefacts, presumably produced by late Neanderthals, from Gorham's Cave in Gibraltar: first, generally accepted estimates of about 32,000 14C years bp for the uppermost Mousterian levels; second, a possible extended Middle Palaeolithic occupation until about 28,000 14C years bp; and third, more contentious evidence for persistence until about 24,000 14C years bp. This study shows that the three sets translate to different scenarios on the role of climate in Neanderthal extinction. The first two correspond to intervals of general climatic instability between stadials and interstadials that characterized most of the Middle Pleniglacial and are not coeval with Heinrich Events. In contrast, if accepted, the youngest date indicates that late Neanderthals may have persisted up to the onset of a major environmental shift, which included an expansion in global ice volume and an increased latitudinal temperature gradient. More generally, our radiocarbon climatostratigraphic approach can be applied to any 'snapshot' date from discontinuous records in a variety of deposits and can become a powerful tool in evaluating the climatic signature of critical intervals in Late Pleistocene human evolution. PMID:17851522

  12. Changes in hemodynamics after placing intracranial stents.

    PubMed

    Tanemura, Hiroshi; Ishida, Fujimaro; Miura, Yoichi; Umeda, Yasuyuki; Fukazawa, Keiji; Suzuki, Hidenori; Sakaida, Hiroshi; Matsushima, Satoshi; Shimosaka, Shinichi; Taki, Waro

    2013-01-01

    Stent-assisted coil embolization has enabled the endovascular treatment of wide-necked cerebral aneurysms. Moreover, recent reports demonstrated that stent-assisted coil embolization was associated with a significant decrease in angiographic recurrences of coiled cerebral aneurysms. One of the possible explanations for this adjunctive effect of stent-assisted coil embolization is changes in the local hemodynamics caused by placing intracranial stents. This study investigated the hemodynamic effect of intracranial stents using computational fluid dynamics (CFD) analysis. The geometry of the intracranial stent, Enterprise(TM) VRD, was acquired by using micro computed tomography and virtually placed across the aneurysm orifice of a saccular aneurysm model (saccular model) and a blister-like aneurysm model (blister-like model) constructed from patient-specific three-dimensional (3D) rotational angiography data. Transient CFD analysis was performed with these models with and without stents. Stent placement induced no significant changes in the 3D streamline in the saccular model and slight changes in the blister-like model. Both saccular and blister-like models with stents had lower wall shear stress (WSS) and flow velocity, and higher oscillatory shear index, WSS gradient, and relative residence time than the equivalent models without stents, indicating the possibility that stent placement induced stagnant and disturbed blood flow. Cross-sectional vector velocity around the stent strut revealed complex blood flow patterns with variable direction and velocity. Although this study was a simulation under limited conditions, similar hemodynamic changes might be induced in the neck remnants treated with stent-assisted coil embolization. PMID:23524501

  13. Whole brain optical imaging

    NASA Astrophysics Data System (ADS)

    Silvestri, Ludovico; Allegra Mascaro, Anna Letizia; Costantini, Irene; Sacconi, Leonardo; Pavone, Francesco S.

    2015-03-01

    Nowadays, there are several imaging techniques offering a complementary approach to visualize intact neural networks on large areas. Each of those offers a different strategy and furnish complementary information on the role of neural components. We will describe different approaches enabling to move from single neuron details to whole brain imaging, connecting short range structural information to long range one. In particular, some examples of correlative microscopies, combining linear and non linear techniques will also be described.

  14. Automating Shallow Seismic Imaging

    SciTech Connect

    Steeples, Don W.

    2004-06-15

    This report covers a one-year, no-cost extension that was requested and received in 2003; the extension runs through September 14, 2004. The extension has been used to continue data analysis and prepare additional manuscripts for submission to refereed journals. The primary research focus of the original three-year period of funding was to develop and demonstrate an automated method of conducting two-dimensional (2D) shallow-seismic surveys with the goal of saving time, effort, and money. Tests involving the second generation of the hydraulic geophone-planting device dubbed the ''Autojuggie'' showed that large numbers of geophones can be placed quickly and automatically and can acquire high-quality data, although not under all conditions (please see the Status and Results of Experiments sections for details). In some easy-access environments, this device could make shallow seismic surveying considerably more efficient and less expensive. The most recent research analyzed the difference in seismic response of the geophones with variable geophone spike length and geophones attached to various steel media. Experiments investigated the azimuthal dependence of the quality of data relative to the orientation of the rigidly attached geophones. Other experiments designed to test the hypothesis that the data are being amplified in much the same way that an organ pipe amplifies sound have so far proved inconclusive. Another element of our research was monitoring the cone of depression around a pumping well, with the well serving as a proxy location for fluid-flow at a contaminated DOE site. We collected data from a well site at which drawdown equilibrium had been reached and at another site during a pumping test. Data analysis disclosed that although we were successful in imaging the water table using seismic reflection techniques (Johnson, 2003), we were not able to explicitly delineate the cone of depression.

  15. Understanding near-Earth asteroids: Is it in the details?

    NASA Astrophysics Data System (ADS)

    Vervack, R.; Howell, E.; Magri, C.; Fernández, Y.; Nolan, M.; Taylor, P.; Marshall, S.; Jones, J.; Rivkin, A.

    2014-07-01

    Studies of near-Earth asteroids (NEAs) are important to our understanding of meteorites, impact probabilities for terrestrial planets, dynamics of the main belt, and asteroid surface processes. Crucial to these investigations is knowledge of the NEA size and albedo distributions and regolith properties; however, as we sample ever-smaller NEAs, we see an increasing variation in these physical properties. A notable diversity of shapes, surface features, and rotation states have been revealed by radar observations, whereas infrared observations have shown a range of spectral types and thermal characteristics. Although spacecraft missions will yield details for a few objects, and space-based surveys will result in important overviews, only ground-based observations can provide an overall understanding of the NEA population as a whole owing to the range of observing conditions (e.g., wavelength coverage, phase angle, heliocentric distance) they provide. Radiometry is commonly used to infer both size and thermal properties, but necessary assumptions about the regolith, which controls thermal and (often) radar reflectance properties, can be especially dangerous for small NEAs because surface properties change as a function of size and irregular shapes play an increasingly important role. Our investigation combines thermal measurements with radar delay-Doppler imaging to better understand the regolith properties of different types of NEAs through detailed thermophysical modeling. Over the past five years, we have measured the spectra of 53 NEAs at different phase angles and rotation phases to see how the inferred thermal properties depend on the detailed shape. The observations were carried out with SpeX at the NASA IRTF (0.8--4 microns) [1], which allows us to measure both the reflected and thermal contributions to the overall spectrum, thereby providing for a greater degree of self- consistency in the thermal modeling than infrared observations alone. The observed objects span a variety of spectral types: S-complex, C-complex, and X-complex, including two high-albedo (Tholen E-type) and two low-albedo (Tholen P-type) asteroids. Most of these objects were also observed with the Arecibo planetary radar. Although the quality of the radar data varies, for many of the objects we can determine the pole, spin state, and surface features from shape modeling without assuming a convex surface [e.g., 2,3]. These radar objects span a gamut of types, from nearly spherical to elongated or irregular shapes, single bodies to contact binaries to multiple-body systems, slow to fast rotators, and sizes from a few hundred meters to a few kilometers. To study the properties of these NEAs, we have developed a thermophysical model, ''SHERMAN'', that uses the detailed shape to simulate multiple observations of an NEA at different viewing geometries, which we then compare to the actual infrared observations to infer the regolith properties. SHERMAN computes the local surface temperature for each facet on the asteroid at the time of observation, including self-shadowing, multiple scattering, and sub-scale roughness [modeled as small hemispherical craters following the methods of 4,5]. We will present an overview of our dataset as well as specific examples comparing our thermal modeling results to those from simple models such as NEATM [6] to illustrate some of the effects shape, observing geometry, and asteroid composition can have on the derived properties.

  16. Alternate States of Proteins Revealed by Detailed Energy Landscape Mapping

    E-print Network

    Baker, David

    Alternate States of Proteins Revealed by Detailed Energy Landscape Mapping Michael D. Tyka1 Keywords: Rosetta; alternative conformations; protein mobility; structure prediction; validation What through analysis of detailed protein energy landscapes generated by large-scale, native- enhanced sampling

  17. 5 CFR 352.905 - Employees on detail.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS REEMPLOYMENT RIGHTS Reemployment Rights After Service With the Panama Canal Commission § 352.905 Employees on detail. (a) An employee detailed to the Commission is subject to the...

  18. 5 CFR 352.905 - Employees on detail.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS REEMPLOYMENT RIGHTS Reemployment Rights After Service With the Panama Canal Commission § 352.905 Employees on detail. (a) An employee detailed to the Commission is subject to the...

  19. 5 CFR 352.905 - Employees on detail.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS REEMPLOYMENT RIGHTS Reemployment Rights After Service With the Panama Canal Commission § 352.905 Employees on detail. (a) An employee detailed to the Commission is subject to the...

  20. 5 CFR 352.905 - Employees on detail.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

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    Code of Federal Regulations, 2010 CFR

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    ...OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS REEMPLOYMENT RIGHTS Reemployment Rights After Service With the Panama Canal Commission § 352.905 Employees on detail. (a) An employee detailed to the Commission is subject to...

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    Code of Federal Regulations, 2014 CFR

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    Code of Federal Regulations, 2011 CFR

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

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    E-print Network

    Paris-Sud XI, Université de

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    Code of Federal Regulations, 2010 CFR

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    Code of Federal Regulations, 2011 CFR

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    Code of Federal Regulations, 2012 CFR

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    Code of Federal Regulations, 2014 CFR

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    Code of Federal Regulations, 2010 CFR

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