Search Results - (Author, Cooperation:R. Shepherd)
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1Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-02-12Publisher: Institute of Physics (IOP)Print ISSN: 1674-1137Topics: PhysicsPublished by: -
2Latest Papers from Table of Contents or Articles in PressC. Larson ; B. Peele ; S. Li ; S. Robinson ; M. Totaro ; L. Beccai ; B. Mazzolai ; R. Shepherd
American Association for the Advancement of Science (AAAS)
Published 2016Staff ViewPublication Date: 2016-03-05Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
3Latest Papers from Table of Contents or Articles in PressS. Nik-Zainal ; H. Davies ; J. Staaf ; M. Ramakrishna ; D. Glodzik ; X. Zou ; I. Martincorena ; L. B. Alexandrov ; S. Martin ; D. C. Wedge ; P. Van Loo ; Y. S. Ju ; M. Smid ; A. B. Brinkman ; S. Morganella ; M. R. Aure ; O. C. Lingjaerde ; A. Langerod ; M. Ringner ; S. M. Ahn ; S. Boyault ; J. E. Brock ; A. Broeks ; A. Butler ; C. Desmedt ; L. Dirix ; S. Dronov ; A. Fatima ; J. A. Foekens ; M. Gerstung ; G. K. Hooijer ; S. J. Jang ; D. R. Jones ; H. Y. Kim ; T. A. King ; S. Krishnamurthy ; H. J. Lee ; J. Y. Lee ; Y. Li ; S. McLaren ; A. Menzies ; V. Mustonen ; S. O'Meara ; I. Pauporte ; X. Pivot ; C. A. Purdie ; K. Raine ; K. Ramakrishnan ; F. G. Rodriguez-Gonzalez ; G. Romieu ; A. M. Sieuwerts ; P. T. Simpson ; R. Shepherd ; L. Stebbings ; O. A. Stefansson ; J. Teague ; S. Tommasi ; I. Treilleux ; G. G. Van den Eynden ; P. Vermeulen ; A. Vincent-Salomon ; L. Yates ; C. Caldas ; L. V. Veer ; A. Tutt ; S. Knappskog ; B. K. Tan ; J. Jonkers ; A. Borg ; N. T. Ueno ; C. Sotiriou ; A. Viari ; P. A. Futreal ; P. J. Campbell ; P. N. Span ; S. Van Laere ; S. R. Lakhani ; J. E. Eyfjord ; A. M. Thompson ; E. Birney ; H. G. Stunnenberg ; M. J. van de Vijver ; J. W. Martens ; A. L. Borresen-Dale ; A. L. Richardson ; G. Kong ; G. Thomas ; M. R. Stratton
Nature Publishing Group (NPG)
Published 2016Staff ViewPublication Date: 2016-05-03Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
4Articles: DFG German National LicensesSmall, Stephen A. ; Zeldin, R. Shepherd ; Savin-Williams, Ritch C.
Oxford, UK : Blackwell Publishing Ltd
Published 1983Staff ViewISSN: 1467-6494Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: PsychologyNotes: Naturally occurring prosocial and dominance behaviors were observed via multiple methods in four groups of adolescents. Individuals varied considerably in their frequency of prosocial and dominance behaviors, regardless of the method employed. These interindividual differences were maintained across situations and over time. The data are consistent with a trait conceptualization of dominance and prosocial behavior. The strength of the present findings suggest that personality researchers need to employ research strategies which extensively observe individuals in the contexts in which they live.Type of Medium: Electronic ResourceURL: -
5Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-03-22Publisher: Royal SocietyElectronic ISSN: 2054-5703Topics: Natural Sciences in GeneralKeywords: bioengineering, biotechnology, health and disease and epidemiologyPublished by: -
6Articles: DFG German National LicensesYoung, B. K. F. ; Osterheld, A. L. ; Price, D. F. ; Shepherd, R. ; Stewart, R. E.
[S.l.] : American Institute of Physics (AIP)
Published 1998Staff ViewISSN: 1089-7623Source: AIP Digital ArchiveTopics: PhysicsElectrical Engineering, Measurement and Control TechnologyNotes: Ultrashort-pulse, laser-produced plasmas have become very interesting laboratory sources to study spectroscopically due to their very high densities and temperatures, and the high laser-induced electromagnetic fields present. Typically, these plasmas are of very small volume and very low emissivity. Thus, studying these near point source plasmas requires advanced experimental techniques. We present a new spectrometer design called the focusing spectrometer with spatial resolution (FSSR-2D) based on a spherically bent crystal which provides simultaneous high spectral (λ/Δλ(approximate)104) and spatial resolution ((approximate)10 μm) as well as high luminosity (high collection efficiency). We described in detail the FSSR-2D case in which a small, near point source plasma is investigated. An estimate for the spectral and spatial resolution for the spectrometer is outlined based on geometric considerations. Using the FSSR-2D instrument, experimental data measured from both a 100 fs and a nanosecond pulse laser-produced plasma are presented. © 1998 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesGuethlein, G. ; Bonlie, J. ; Price, D. ; Shepherd, R. ; Young, B. ; Stewart, R.
[S.l.] : American Institute of Physics (AIP)
Published 1995Staff ViewISSN: 1089-7623Source: AIP Digital ArchiveTopics: PhysicsElectrical Engineering, Measurement and Control TechnologyNotes: Ions from this plasma are self-extracting with energies of 0.1 to 100 keV, the extraction potential being one of the desired observables. The charge/mass (z/μ, μ is mass in AMU) separation is provided by a static magnetic field (B⋅L=1280 G cm, FWHM=14 mm) located 5 cm from the linear (1−d) detector. Displacement along the detector axis is thus proportional to z/μ(1/v). The detector is a gold cathode MCP with a fast (sub-ns) phosphor. The phosphor output is coupled into a streak camera (typical sweep 8.5 or 24 μs total) through a coherent fiber bundle. Streak images are grabbed with a 14-bit CCD. The signature of any specific ion is a straight line of slope proportional to z/μ. Since there are usually more than one charge state of a given ion, integer multiple slopes appear. Thus z and m can be found. Absolute calibration is taken from the slope of the proton streak, which is always present with our plasmas. While providing the same information as a Thomson parabola, the straight line images are easier to extract information from and offer resolution with less energy dependence. By providing mass and time of flight information, the product of z⋅Te can be determined unambiguously during the hydrodynamic acceleration of the plasma. © 1995 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesJones, L. A. ; Kallne, E. ; Kania, D. R. ; Maestas, M. ; McGurn, J. S. ; Shepherd, R.
[S.l.] : American Institute of Physics (AIP)
Published 1985Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: A technique for calibrating an x-ray streak camera in situ has been developed. It has been applied to an x-ray streak camera installed on a collapsing gas shell Z-pinch. The calibration was done by simultaneously measuring the emitted x-rays using a pinhole camera, an InP:Fe photoconductive detector, and the streak camera. The spatial dimension of the streak image was calibrated by integrating the film density over time and fitting the resulting data to the corresponding information taken from an x-ray pinhole image. The temporal calibration was obtained by similarly fitting the film density from the x-ray streak image as a function of time integrated over the appropriate part of the spatial dimension with the signal from an InP:Fe photoconductive detector. By using this technique we have found a spatial magnification of the streak camera system consistent with the results derived from the geometrical optics to within 10%. A temporal dispersion of 2.5±0.5 ns/mm was obtained, which is in agreement with the nominal speed of 2.5 ns/mm. This technique also yielded an absolute intensity calibration of the streak camera.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesKania, D. R. ; Jones, L. A. ; Shepherd, R. L. ; Maestas, M. D. ; Wagner, R. S. ; Hammond, R. B. ; Bradley, J. M.
[S.l.] : American Institute of Physics (AIP)
Published 1985Staff ViewISSN: 1089-7623Source: AIP Digital ArchiveTopics: PhysicsElectrical Engineering, Measurement and Control TechnologyNotes: Recently we have demonstrated that InP:Fe photoconductors are fast (FWHM∼150 ps), sensitive (2.7×10−3 A/W), and flat response soft x-ray detectors using synchrotron radiation from the Stanford Synchrotron Radiation Laboratory.1 We have applied these to the measurement of the radiation emitted by a collapsing annular gas (argon) puff z-pinch plasma. The detector was used in two modes of operation: (1) a filtered soft x-ray detector as a pinch diagnostic and (2) a fast unfiltered bolometer to measure the total radiated power as a function of time. We will compare the performance of the photoconductors to other common fast x-ray detectors and bolometers.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesJones, L. A. ; Kania, D. R. ; Shepherd, R. L. ; Maestas, M. D.
[S.l.] : American Institute of Physics (AIP)
Published 1985Staff ViewISSN: 1089-7623Source: AIP Digital ArchiveTopics: PhysicsElectrical Engineering, Measurement and Control TechnologyNotes: The shape and absolute intensity of the infrared emission as a function of wavelength can yield information about the conditions in a plasma. This diagnostic technique has been reviewed by Zwicker,1 who gives several examples of its application to low density plasmas. We have applied this diagnostic, for the first time, to a high density (∼1020 cm−3) plasma, a collapsing gas (argon) shell Z pinch. Using a fast Au doped Ge detector and infrared notch filters we have scanned the emitted spectrum from ∼0.5 to 8.2 μm with l-ns time resolution. This spectral range encompasses the optically thin-to-thick transition as well as the plasma frequency at the time of peak compression. We will present this data along with an interpretation which allows us to follow the development of the pinched column during the thermalization stage.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesSheriff, M. H. R. ; Hardman, M. ; Lamont, C. A. R. ; Shepherd, R. ; Warren, D. J.
Oxford, UK : Blackwell Publishing Ltd
Published 1978Staff ViewISSN: 1471-0528Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: A 44-year-old patient had been treated by intermittent haemodialysis for almost three years when she presented with a 28-week pregnancy. Successful delivery of a healthy but small infant was achieved by Caesarean section at 36 weeks. The successful outcome of this pregnancy was attributed to close control of the haemoglobin concentration and blood chemistry, and to increased frequency of dialysis. The relative value of various chemical tests of fetal maturity in the presence of maternal renal failure are discussed.We are grateful to Dr J. Durant for help with hormone assays and their interpretation and to our nursing staff for their careful support.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesShepherd, R. G. ; Baughn, C. ; Cantrall, M. L. ; Goodstein, B. ; Thomas, J. P. ; Wilkinson, R. G.
Oxford, UK : Blackwell Publishing Ltd
Published 1966Staff ViewISSN: 1749-6632Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Natural Sciences in GeneralType of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesShepherd, R. ; Price, D. ; Nathel, H. ; White, W. ; Slaughter, D. ; Stewart, R.
[S.l.] : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7623Source: AIP Digital ArchiveTopics: PhysicsElectrical Engineering, Measurement and Control TechnologyNotes: The characterization of subpicosecond laser produced plasmas is currently being investigated by the Livermore ultrashort pulse laser group. A 800-nm, 150-fs, 35-mJ laser is focused to a 7-μm spot on solid aluminum targets, producing XUV (〈1 keV), K shell (1.5–30 keV), and hard (≥3.0 keV) x-ray emission. The K-shell emission is studied using a Von Hamos crystal spectrograph with a KAP crystal curved to an 80-mm radius, resulting in a calculated resolution of E/ΔE≈400. The dispersed x rays are detected with a microchannel plate intensified reticon detector which relays the images out of the chamber and displayed on a computer monitor. The hard x rays are monitored with an array of filter x-ray diodes, covering energies from 3 to 75 keV. The XUV emission is monitored with a variably spaced line grating, flat field spectrometer, and a grazing incidence spectragraph. The diagnostics will be presented along with current data from experiments. This work was performed under the auspices of the U. S. Department of Energy by Lawrence Livermore National Laboratory under Contract No. W-7405-ENG-48.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesFrewer, L. J. ; Howard, C. ; Hedderley, D. ; Shepherd, R.
Oxford, UK : Blackwell Publishing Ltd
Published 1996Staff ViewISSN: 1539-6924Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Energy, Environment Protection, Nuclear Power EngineeringNotes: Trust in risk information about food related-hazards may be an important determinant of public reactions to risk information. One of the central questions addressed by the risk communication literature is why some individuals and organizations are trusted as sources of risk information and others are not. Industry and government often lack public trust, whereas other sources (for example, consumer organizations, the quality media, medical doctors) are highly trusted. Problematically, previous surveys and questionnaire studies have utilized questions generated by the investigators themselves to assess public perceptions of trust in different sources. Furthermore, no account of the hazard domain was made. In the first study reported here, semistructured interviewing was used to elicit underpinning constructs determining trust and distrust in different sources providing food-related risk information (n= 35). In the second study, the repertory grid method was used to elicit the terminology that respondents use to distinguish between different potential food-related information sources (n= 35), the data being submitted to generalised Procrustes analysis. The results of the two studies were combined and validated in survey research (n= 888) where factor analysis indicated that knowledge in itself does not lead to trust, but that trusted sources are seen to be characterised by multiple positive attributes. Contrary to previous research, complete freedom does not lead to trust—rather sources which possess moderate accountability are seen to be the most trusted.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesGADSBY, DAVID C. ; NODA, MAMI ; SHEPHERD, R. NEAL ; NAKAO, MASAKAZU
Oxford, UK : Blackwell Publishing Ltd
Published 1991Staff ViewISSN: 1749-6632Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Natural Sciences in GeneralType of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 1745-459XSource: Blackwell Publishing Journal Backfiles 1879-2005Topics: Chemistry and PharmacologyProcess Engineering, Biotechnology, Nutrition TechnologyNotes: Two studies are reported on the effect ofingestion on the relative-to-ideal ratings of salt in soup. In the first study there was a reduction in the measure of ideal concentration from pre- to post-ingestion, with subjects consuming the soups ad libitum. However, a measure of ideal concentration derived from several small samples presented in each session agreed well with the final post-ingestion ideal. A measure of most preferred concentration of salt based on total soup consumption was unrelated to the other measures.In the second experiment, the post-ingestion decrease in most preferred salt concentration was replicated when subjects consumed a fixed quantity of soup. The post-ingestion ideal was similar to that derived from rating either several small samples in one session or one single small sample per session.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 1745-459XSource: Blackwell Publishing Journal Backfiles 1879-2005Topics: Chemistry and PharmacologyProcess Engineering, Biotechnology, Nutrition TechnologyNotes: Eight samples of dried tomato soups were profiled by a trained panel, who also provided ratings of overall liking and liking for particular attributes on relative-to-ideal rating scales. A consumer panel tested a subset of four of the soups in home trials, assessing them for overall liking and for particular attributes on either hedonic or relative-to-ideal rating scales.The pattern of overall preferences differed between the trained and untrained panelists, demonstrating the inappropriateness of using trained panelists to provide measures of preference or acceptance. The conclusions regarding consumer preferences would differ depending on which rating scale was used; these differences disappeared when the relative-to-ideal ratings were converted into values of the same form as the hedonic ratings. The overall liking was best predicted by flavor rather than color or thickness.A principal components analysis (PCA) of the profile data compared well with a plot based on the trained panel preference data using MDPREF. The preference data were also fitted to the PCA dimensions using the PREMAP vector model, which gave a good fit for only six of the 15 trained panelists; the PREMAP ideal point model failed to show a better fit. In order to test these models adequately more than eight samples would need to be tested.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesShepherd, R. A. ; Graham, W. R. M.
College Park, Md. : American Institute of Physics (AIP)
Published 1987Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: An extensive FTIR isotopic matrix study using deuterium and carbon-13 has been conducted on the midinfrared spectrum at 250 to 4800 cm−1 of the C2H ethynyl radical produced by the vacuum UV photolysis of acetylene. An absorption at 2104 cm−1 can be assigned to a combination band involving one quantum each of the ν2, bending and the ν3, C–C stretching vibrations. This result implies an unexpectedly low value of ∼260 cm−1 for ν2. Identification of the combination band in this work gives the first indication of the value of the ν2 fundamental, which has not otherwise been observed. The results of carbon-13 substitution on a band at 3610 cm−1 do not appear to be consistent with its previous assignment to the ν1, C–H stretching vibration of C2H. However, carbon-13 shifts for the C2D band at 2798 cm−1 support its assignment to ν1. Absorptions corresponding to several vibronic bands of the A 2Π←X 2Σ+ transition, which have recently been reported in gas phase studies using color center laser spectroscopy, are observed in the matrix spectra, confirming that these bands originate from the lowest vibrational level of the ground state. The effects of carbon-13 substitution on these bands are reported.Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesStaff View
ISSN: 1365-2621Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Process Engineering, Biotechnology, Nutrition TechnologyNotes: Thirty subjects rated samples of paté with five concentrations of salt for intensity of saltiness and for liking. The samples were made up either with the salt incorporated into the paté or added to the surface as small or large crystals. Intensity was highest for the small crystals on the surface and lowest for the salt in the food. The slope of the psychophysical function was also lower for salt in the food than on the surface and the Weber ratio for the salt in the food was larger. There was no significant difference in the most preferred concentration of salt between samples with the salt in or on the food but overall liking was lower for the latter. These results show that a surface coating will give greater saltiness than the same amount of salt incorporated into the food, but as the surface coated paté samples were less liked, this would not offer a useful means for reducing the amount of salt in the diet.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesStaff View
ISSN: 1460-2466Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: Media Resources and Communication Sciences, JournalismType of Medium: Electronic ResourceURL: