Nuclear thermal propulsion test facility requirements and development strategy

The Nuclear Thermal Propulsion (NTP) subpanel of the Space Nuclear Propulsion Test Facilities Panel evaluated facility requirements and strategies for nuclear thermal propulsion systems development. High pressure, solid core concepts were considered as the baseline for the evaluation, with low pressure concepts an alternative. The work of the NTP subpanel revealed that a wealth of facilities already exists to support NTP development, and that only a few new facilities must be constructed. Some modifications to existing facilities will be required. Present funding emphasis should be on long-lead-time items for the major new ground test facility complex and on facilities supporting nuclear fuel development, hot hydrogen flow test facilities, and low power critical facilities

Analytic results for two-loop Yang-Mills

Recent Developments in computing very specific helicity amplitudes in two loop QCD are presented. The techniques focus upon the singular structure of the amplitude rather than on a diagramatic and integration approachComment: Talk presented at 13th International Symposium on Radiative Corrections, 24-29 September, 2017,St. Gilgen, Austria, 9 page

Precision measurement of the 5 2S1/2 - 4 2D5/2 quadrupole transition isotope shift between 88Sr+ and 86Sr+

We have measured the isotope shift of the narrow quadrupole-allowed 5 2S1/2 - 4 2D5/2 transition in 86Sr+ relative to the most abundant isotope 88Sr+. This was accomplished using high-resolution laser spectroscopy of individual trapped ions, and the measured shift is Delta-nu_meas^(88,86) = 570.281(4) MHz. We have also tested a recently developed and successful method for ab-initio calculation of isotope shifts in alkali-like atomic systems against this measurement, and our initial result of Delta-nu_calc^(88,86) = 457(28) MHz is also presented. To our knowledge, this is the first high precision measurement and calculation of that isotope shift. While the measurement and the calculation are in broad agreement, there is a clear discrepancy between them, and we believe that the specific mass shift was underestimated in our calculation. Our measurement provides a stringent test for further refinements of theoretical isotope shift calculation methods for atomic systems with a single valence electron

The effect of Cichorium intybus and Lotus corniculatus on nematode burdens and production in grazed lambs

This report was presented at the UK Organic Research 2002 Conference. The study was designed to examine the hypothesis that chicory (Cichorium intybus) and Lotus sp. (Lotus corniculatus) have the potential to affect the naturally acquired nematode burden in grazed lambs. Organic male castrate lambs (48) with a naturally acquired parasite burden grazed replicate combination plots (0.6 ha) of chicory, Lotus corniculatus, perennial ryegrass (Lolium perenne) and white clover (Trifolium repens). Lamb performance was determined by weekly weight gain and condition score assessments. Nematode burden was assessed by individual lamb faecal egg count (FEC) before and after drenching (levamisole). The range of parasitic helminths present was assessed by faecal culture and by total worm counts performed on a proportion of the lambs at slaughter. Weekly pasture larval counts (PLCs) were conducted on the trial plots. A concurrent small plot study (6 x 1m2 replicates) of each of the forages used in the grazing trial was run to assess the potential effect of forage type on the development and survival of Teladorsagia circumcincta assessed by weekly PLCs. Preliminary data suggest that lambs grazing chicory or a combination of lotus and chicory had lower FECs than those grazing PRG/WC, however there was no significant difference in the total worm counts

Narcissus

https://digitalcommons.ithaca.edu/sheetmusic/1151/thumbnail.jp

Aerodynamics of Slender Bodies at Mach Number of 3.12 and Reynolds Numbers from 2 x 10(exp 6) to 15 x 10(exp 6) : Body of Revolution with Near-parabolic Forebody and Cylindrical Afterbody

An experimental investigation of the aerodynamic characteristics of a slender, square-based body of revolution was conducted at a Mach number of 3.12 for angles of attack from 0 degree to 10 degrees and for Reynolds numbers from 2 x 10(exp 6) to 15 x 10(exp 6). Boundary-layer measurements at zero angle of attack are compared with several compressible flow formulating for predicting boundary-layer characteristics. Comparison of experimental pressure and force values with theoretical values showed good agreement for low angles of attack. The measured mean skin-friction coefficients agreed well with those predicted by Mangler's transformation for laminar flow over cones

Setting the Limits in Texas Construction Law: A Look at the Surety\u27s Limitations under Indemnity Agreements and Equitable Subrogation Comment.

To clarify divergent case law, Texas courts should adopt good faith as the necessary standard governing indemnity agreements. Texas court decisions limiting settlement of bond claims by sureties can be split into three categories: (1) those cases where indemnity agreements fail to vest authority in the indemnitee to settle claims or require a good faith standard; (2) those expressly stating indemnitees have authority to settle claims in good faith; and (2) those expressly vesting a surety with exclusive rights to determine which bonded claims should be settled. Under the first line of cases courts apply common law indemnity principles requiring the indemnitee show settlements are both in good faith and reasonable considering the involved risk. In the second view, courts recognize a standard allowing surety discretion limited by fraud only. The final view abandons common law principles by limiting sureties only by improper motives and bad faith. Under the second and third views courts shield sureties by granting broad discretion in settling debts over the rights of defaulting principals. In these two scenarios, sureties could potentially disregard available facts that prove conduct by principals was justified in failing to complete contractual obligations by prioritizing claim settlement over the best interest of the principal. The Texas Supreme Court does not recognize that indemnity agreements alone create a fiduciary duty and do not impose a blanket common law duty of good faith in the surety context. Surety and principal rights are far from clear and potentially severe consequences may accompany a default. Parties need clear standards to operate, and Texas could eliminate confusion by recognizing a good faith standard in settlements extraneous of the language found in the indemnity agreement

Setting the Limits in Texas Construction Law: A Look at the Surety\u27s Limitations under Indemnity Agreements and Equitable Subrogation Comment.

To clarify divergent case law, Texas courts should adopt good faith as the necessary standard governing indemnity agreements. Texas court decisions limiting settlement of bond claims by sureties can be split into three categories: (1) those cases where indemnity agreements fail to vest authority in the indemnitee to settle claims or require a good faith standard; (2) those expressly stating indemnitees have authority to settle claims in good faith; and (2) those expressly vesting a surety with exclusive rights to determine which bonded claims should be settled. Under the first line of cases courts apply common law indemnity principles requiring the indemnitee show settlements are both in good faith and reasonable considering the involved risk. In the second view, courts recognize a standard allowing surety discretion limited by fraud only. The final view abandons common law principles by limiting sureties only by improper motives and bad faith. Under the second and third views courts shield sureties by granting broad discretion in settling debts over the rights of defaulting principals. In these two scenarios, sureties could potentially disregard available facts that prove conduct by principals was justified in failing to complete contractual obligations by prioritizing claim settlement over the best interest of the principal. The Texas Supreme Court does not recognize that indemnity agreements alone create a fiduciary duty and do not impose a blanket common law duty of good faith in the surety context. Surety and principal rights are far from clear and potentially severe consequences may accompany a default. Parties need clear standards to operate, and Texas could eliminate confusion by recognizing a good faith standard in settlements extraneous of the language found in the indemnity agreement