860 research outputs found
Optimizing the performance of an atmospheric Cherenkov telescope
No full textThis thesis is concerned with the performance of the Mark 6 atmospheric Cherenkov telescope, which is the latest triple-coincidence VHE gamma-ray telescope built by the Durham group. Chapter 3 describes the Durham telescopes, with particular reference to the Mark 6 telescope. It goes on to describe the procedures which are involved in taking and processing data and the subsequent analysis of such data using imaging techniques to distinguish between gamma-rays and the cosmic-ray background. The quality and quantity of data recorded are dependent upon the performance of various components of the telescope and also on the environment in which it operates. Chapter 4 discusses the effects of such parameters on the performance of the telescope and describes the efforts made to minimize the variations in the data caused by changes in these conditions. Chapter 5 describes the improvements made to the telescope design and operation post-construction ui order to increase the rate of data acquisition and to improve the quality of the data, particularly with a view to enhancing the telescope sensitivity to low energy gamma-rays. Data taken with 2 separate and simple light collectors/detectors can be combined to use differences in the distribution of light from gamma-ray and hadronic induced showers to discriminate between them. Chapter 6 contains the results of such a study of the stereoscopic properties of Cherenkov signals using the Durham Mark 6 and Mark 5A telescopes and highlights the use of data taken using the well-separated left and right detectors of the Mark 6 telescope for a similar purpose. The final chapter reviews the achievements to date in terms of the improvements made to the telescope and the sources detected during its operation. It goes on to describe future developments to further enhance the telescope performance
DNS of inertial wave attractors in a librating annulus with height-dependent gap width
No full textDirect numerical simulations (DNS) of inertial wave attractors have been carried out in a librating Taylor-Couette system with broken mirror symmetry in the radial-axial cross-section. The inertial wave excitation mechanism and its localisation at the edges was clarified by applying boundary layer theory. Additional resonance peaks in the simulated response spectra were found to agree with low-order wave attractors obtained by geometric ray tracing. Numerics and theory are in qualitative agreement with recent lab experiments
Superitendent I.D. Graham
No full textTouchstone is Kansas State University's student-edited literary arts magazine that showcases literary work by graduate and undergraduate students. It is published annually each spring by the College of Arts and Sciences with assistance from Kansas State University's creative writing faculty, the Fine Arts Council, and the English Department.CONTENTS: [Untitled cover art] / Lori Beikman -- Early rising / Jonathan A. Small -- Writing gulls / Ben Cartwright -- Walking through orchards / Ben Cartwright -- Mission Avenue music / Sharon Moreland -- Magic / Kimberly Riley -- Dividing line / Kiersten Allen -- Virgin Mary / Kris Steward -- Thoughts of great-grandaughter at the viewing of the body / Jennifer Bergen -- Running the Konza / Jennifer L. Johnson -- Last evening in Westerbork / Jennifer L. Johnson -- Morning in Costa Rice / Elizabeth Roberts -- Klimt's water serpents / Elizabeth Roberts -- Hills / Debra Pettric -- Boxed / Cristina Janney -- I bet she kept the negatives / Tracy Abeln -- The stigma / Keely Schields -- Marriage to vengeance / Kevin Owens -- Live / Nana Obermann -- Laramie corner / Jennifer Farris -- The last touch / Jennifer Farris -- Fountain stories / Jennifer FarrisCitation: Janicki, S. & Rodenbeek, M. (Eds.). (1996). Touchstone, 28.Morse Department of Special Collection
Struvite precipitation within wastewater treatment: A problem or a circular economy opportunity?
No full textEnhanced biological phosphorus removal at wastewater treatment plants that use anaerobic digesters for sludge treatment have historically encountered phosphate precipitation problems in the form of struvite. Literature on struvite is thin which is surprising given it can foul/block the sludge return lines and associated pumps and valves, causing significant operational problems. This study has evaluated if a typical large wastewater treatment plant can overcome this problem by adopting circular economy thinking. The struvite profile based on the supersaturation ratio of (Mg:NH(4):PO(4)(2−)), pH and temperature demonstrates the potential operational hotspots that can present uncontrolled struvite formation. Based on current struvite monitoring technologies and a cost-benefit analysis, the controlled struvite recovery via an Ostara crystallization reactor has been demonstrated to be economically viable with a pay-back period of less than a decade. An integrated evaluation illustrates the positive environmental impact arising from the utilisation of the recovered product. Economic viability and payback periods will vary according to circumstances, but we recommend that WWTP operators globally consider fitting a crystallisation reactor to appropriate plants, The outcomes and recommendation from this study are particularly timely given the global fertiliser shortage (2022) that is driving up food prices and reducing crop sizes
Bar and David's Furniture & Appliance, Sisseton SD, Roberts County
No full text35 mm slide, a single-story brick building with signs bearing the text "No Minors You must be 21 I.D. Required", "Budweiser", "Lite", "Open" and "Lottery", a single-story brick building to the left has signs bearing the text "The [P]awn Shop", "Speed Queen Washers and Dryers" and "Kathy's Beauty Shop"Drawer info: Pennington -Turner;Kodachrome Film RO-SI-SI-16 Sisseton, SD 1996 13 Oct 9
Roberts, Elizabeth (Death, 1893-05-07)
No full textAddress: 322 Westminister AvenueAge at death: 37144/Pg 46/1893/F Col. M/Ky./Dr. I.D. Jones/Menninger/Colored AmericanOriginal record filed in drawer labeled 'RIS-ROBINSON, J'
Roberts, Edward (Death, 1908-07-01)
No full textAddress: 2345 Highland AvenueAge at death: 76 yrs 6mos 29 days27/Pg 80/1908/M W W/B.P.- Wales/Dr. I.D. Jones/Rose & Swendler/Spring Grove Cem.Original record filed in drawer labeled 'RIS-ROBINSON, J'
March 5, 1905 Page three Frank Plummer elected school director
No full textFelger, William Willis; Hastings, Francel; Wyckoff, A.B.; Blackwood, Henry; Heath, Harriet; Mann, Ina; Hill, Haddie; O'Farrell, James; Trimble, D.P.; Sorge, Freda; Biggs, Mary; Mercereau, C.W.; Siebenbaum, John; PIttman, George; Long, William; Walther, Julius; Snyder, A.M.; Andrews, William; Patterson, Ella; Thornton, Kate; Roberts, O.W.; O'Neill, I.D.; Fischer, Charles; Biggs, E.T.; Delgardno, James, Sr.; Klinger, Emil J.; Lake, William T.; Plummer, Frank; Elliott, F.E.
Intradermal immunization with a bovine herpesvirus-1 DNA vaccine induces protective immunity in cattle
No full textAlthough intramuscular (i.m.) injection of DNA encoding glycoprotein D (gD) of bovine herpesvirus-1 (BHV-1) induces immune responses in cattle, this route of delivery is inefficient. Here we assessed three parameters that may enhance the efficacy of a gD DNA vaccine in cattle. First, the immune response generated by i.m. injected plasmid expressing a secreted form of gD (tgD) was determined and found to be very similar in magnitude to the response induced by gD-expressing plasmid. Secondly, gD- and tgD-expressing plasmids were administered by intradermal (i.d.) immunization, which resulted in a superior immune response to the secreted form, but no improvement in the response to the membrane-associated form. However, the form of gD used for immunization did not influence the immunoglobulin subtype, the ratio of antigen-specific IgG1 to IgG2 being approximately 4:1. Finally, the effect of promoter strength was assessed by replacing the Rous sarcoma virus (RSV) promoter, which was used in the original experiments, with the human cytomegalovirus immediate early promoter and first intron A (HCMV/IA). Although upon transfection in vitro the HCMV/IA promoter appeared to be stronger than the RSV promoter, there was only a 2-fold higher antibody response in vivo upon i.d. injection of cattle. Protection against virus challenge was obtained in the calves immunized i.d. with tgD-encoding plasmid, as shown by a significant reduction in weight loss, virus excretion, temperature response and clinical disease. No significant protection was observed in the animals vaccinated i.d. with the gD-expressing plasmid, which correlates with the lower level of immunity pre-challenge.ID: 3643; LR: 20081121; JID: 0077340; 0 (Antibodies, Viral); 0 (Immunoglobulin G); 0 (Vaccines, DNA); 0 (Viral Proteins); 0 (Viral Vaccines); 0 (bovine herpesvirus type-1 glycoproteins); 82115-62-6 (Interferon-gamma); ppublishSource type: Electronic(1
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