12,986 research outputs found
Interview with Henry C. Williams
No full textHenry C. Williams, a Tennessee native, served during World War II with the 90th infantry division, 3rd Army. He was inducted in April of 1942, starting as a private and leaving as a staff sergeant in November of 1945. He was present on D-Day at Utah Beach as part of the three-man team working a 30-caliber water-cooled machine gun. He is the author of Combat Boots, a memoir of his time in the service
C. Ray Williams director of multicultural programs and services
No full textC. Ray Williams, Jr., currently assistant director of the Multicultural Academic Opportunities Program at Virginia Tech has been named the university's director of multicultural programs and services
Time Resolved Two Dimensional X-Ray Densitometry of a Two Phase Flow Downstream of a Ventilated Cavity
No full textTo measure the void fraction distribution in gas-liquid flows, a two-dimensional x-ray densitometry system was developed. This system is capable of acquiring a two-dimensional projection with a 225 cm2 area of measurement through 21 cm of water. The images can be acquired at rates on the order of 1 kHz. Common sources of error in x-ray imaging, such as x-ray scatter, image distortion, veiling glare, and beam hardening were considered, and mitigated. The measured average void fraction was compared success fully to that of a phantom target and found to be within 1%. To evaluate the performance of the new system, the flow in and downstream of a ventilated nominally two-dimensional partial cavity was investigated and compared to measurements from dual tip fiber optical probes and high speed video. The measurements were found to have satisfactory agreement for void fractions above 5% of the selected void fraction measurement range.Office of Naval Research under grant N00014-10-1-097
ESP Across Cultures 15
No full textThe five papers constituting volume 15 of ESP Across Cultures are written by scholars working in Italy, each concerned with a different aspect of specialized discourse but in all cases involving a comparison between English and Italian. In her paper, Flavia Cavaliere analyses the various translation strategies employed when providing subtitles in Italian on food-related themes in 25 films produced between 1972 and 2014. After highlighting the fact that subtitling requires ‘condensation’, and thus differs from the more standard forms of translation, the author explores in detail the complex relationship between language and culture in AudioVisual Translation. She concludes that, seen from a diachronic perspective, “the more recent the film, the more subtitlers opt for foreignization, hence promoting the ST culture”, with ever greater attention being given to cultural diversities in the 21st century. Massimiliano Demata looks at the Italian translations of three articles on Italian politics published in 2015 in the New York Times and the Financial Times. He examines “the discursive re-localization” of these three translations when they were circulated in the context of Italy’s politics and media, arguing that the three case studies discussed “are evidence that translation is used as an instrument of political legitimization (or delegitimization)”. He concludes that the case studies analysed prove that “translation itself is often heavily contested and that certain translations are considered to be ‘wrong’ because they are seen as the product of textual manipulation, with specific political interests in mind.” Daniele Franceschi provides a corpus-based multimodal investigation of spoken learner English produced by Italian mother-tongue university students simulating lawyer-client interviews as part of their in-course assessment tasks. The author pinpoints some of the recurrent difficulties Italian university students have in using both general and specialized English in the context of simulated lawyer-client interactions. His aim is “to cast light on student performance when using spoken legal English in order to propose new techniques for the improvement of didactic materials that are, still today, almost exclusively oriented towards teaching written legal language.” In their paper Michela Giordano and Antonio Piga explore from a cross-cultural perspective the communicative strategies adopted by the EU to gain consensus and promote its institutional project. They investigate the discursive devices and structures employed in EU brochures in Italian and in English in order to analyse to what extent the two different national contexts and languages influence the strategic features of EU informative material. They conclude that “there are no striking differences between the two versions of the booklets (despite some dissimilarities in the grammatical realization of the nP structure in the two languages).” Rosita Maglie looks at the language of scientific popularization through two main genres used in the pharmaceutical context: Patient Information Leaflets (PILs) and online video ads. The author analyses three drug categories (over-thecounter drugs, over-the-counter drugs with medical supervision, and drugs requiring medical prescription) in English and Italian: she also examines commercials for the same drugs found on YouTube. Through this multimodal analysis the author hopes to contribute to the expansion of “our knowledge of a new and popular way to spread medical knowledge across languages and cultures, which has been changing the physician-patient relationship from a merely informative to a meaningfully emotional point of view.
Experimental Measurements and Computer Simulation of Fission Product Gamma-Ray Spectra
No full textAirborne gamma ray spectrometry using high volume scintillation detectors, optionally in conjunction with Ge detectors, has potential for making rapid environmental measurements in response to nuclear accidents. An experimental investigation and computer simulation have been used to characterise the response of such detectors to short lived fission products. Small samples of 235U were irradiated in a research reactor for short periods, to generate fission product sources. Gamma ray spectra were recorded over a period of one year using both high volume scintillation detectors and semiconductor detectors. The main gamma emitting nuclides have been identified, and their associated signals in each detector defined. Simulation work has been used to calculate the corresponding spectra which would have been observed at airborne survey heights, or from fission product sources irradiated for a prolonged period. While Ge detectors can record a fuller range of isotopes, of interest in characterising release terms, the NaI spectra also have potential for providing data on a range of radiologically important isotopes at all stages
The X-ray crystal structures of primary aryl substituted selenoamides
No full textThe authors are grateful to the University of St Andrews and the Engineering and Physical Science Research Council (EPSRC, U.K.) for financial support.The X-ray structures of 12 primary selenoamides are reported. Metric parameters are provided, together with an illustration of the range of hydrogen bonding motifs.Peer reviewe
Registration and tracking to integrate X-ray and MR images in an XMR facility
No full textWe describe a registration and tracking technique to integrate cardiac X-ray images and cardiac magnetic resonance (MR) images acquired from a combined X-ray and MR interventional suite (XMR). Optical tracking is used to determine the transformation matrices relating MR image coordinates and X-ray image coordinates. Calibration of X-ray projection geometry and tracking of the X-ray C-arm and table enable three-dimensional (3-D) reconstruction of vessel centerlines and catheters from bi-plane X-ray views. We can, therefore, combine single X-ray projection images with registered projection MR images from a volume acquisition, and we can also display 3-D reconstructions of catheters within a 3-D or multi-slice MR volume. Registration errors were assessed using phantom experiments. Errors in the combined projection images (two-dimensional target registration error--TRE) were found to be 2.4 to 4.2 mm, and the errors in the integrated volume representation (3-D TRE) were found to be 4.6 to 5.1 mm. These errors are clinically acceptable for alignment of images of the great vessels and the chambers of the heart. Results are shown for two patients. The first involves overlay of a catheter used for invasive pressure measurements on an MR volume that provides anatomical context. The second involves overlay of invasive electrode catheters (including a basket catheter) on a tagged MR volume in order to relate electrophysiology to myocardial motion in a patient with an arrhythmia. Visual assessment of these results suggests the errors were of a similar magnitude to those obtained in the phantom measurement
The 1.6 Angstrom X-ray structure of the unusual c-type cytochrome, cytochrome c(L), from the methylotrophic bacterium Methylobacterium extorquens
No full textThe structure of cytochrome c(L) from Methylobacterium extorquens has been determined by X-ray crystallography to a resolution of 1.6 Angstrom. This unusually large, acidic cytochrome is the physiological electron acceptor for the quinoprotein methanol dehydrogenase in the periplasm of methylotrophic bacteria. Its amino acid sequence is completely different from that of other cytochromes but its X-ray structure reveals a core that is typical of class I cytochromes c, having alpha-helices folded into a compact, structure enclosing the single haem c prosthetic group and leaving one edge of the haem exposed. The haem is bound through thioether bonds to Cys65 and Cys68, and the fifth ligand to the haem iron is provided by, His69. Remarkably, the sixth ligand is provided by His112, and not by ligand in solution. Met109, which had been shown to be the sixth ligand in solution. Cytochrome c(L) is unusual in having a disulphide bridge that tethers the long C-terminal extension to the body of the structure. The crystal structure reveals that, close to the inner haem propionate, there is tightly bound calcium ion that is likely to be involved in stabilization of the redox potential, and that may be important in the flow of electrons from reduced pyrroloquinoline quinone in methanol dehydrogenase to the haem of cytochrome c(L). As predicted, both haem propionates are exposed to solvent, accounting for the unusual influence of pH on the redox potential of this cytochrome
"My Dear Doctor Williams", Beat Scene 41
No full textL'autrice tratta del carteggio tra W C Williams e Cristina Campo, sua traduttrice.The author deals with the correspondence between W C Williams and his translator, Cristina Campo
Effects of weathering on in situ portable X-ray fluorescence analyses of geological outcrops: dolerite and rhyolite outcrops from the Preseli Mountains, South Wales
No full textLaboratory experiments were undertaken to investigate the effect of weathering on dolerite and rhyolite samples from the Preseli Mountains, South Wales, an area of archaeological significance for the provenancing of archaeological artefacts. Portable XRF (PXRF) analysis was used to construct a depth profile of elemental concentrations through the weathering layer of suitable rock samples. These measurements were made by sequentially grinding away successive layers, each time measuring the newly exposed surface by PXRF. The elements studied included K, Ca, Ti, Mn, Fe, Ba, Nb, Pb, Sr, Y and Zr. In dolerite samples, Ca, Fe and Y were generally depleted in heavily weathered surface layers, whereas K and Pb were enhanced, the latter element significantly so, probably as a result of anthropogenic activities (emissions from leaded automobile fuel). Element behaviour in rhyolites was less consistent. A correction factor was derived for each element based on the ratio of the weathered surface concentration to the corresponding steady-state (fresh rock) concentration beneath the altered layer. This correction factor was evaluated as a possible means of compensating for elemental discrepancies when measuring weathered surfaces. Improved data were obtained for a significant number of elements, but further work is required to evaluate this procedure fully
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