"The Four Winds" for orchestra

It is my intent to portray the "Four Winds" in an abstract way, painting a musical impression in each movement. To facilitate this, I am treating each wind as a unique character and featuring one of the four families of orchestral instruments in each movement. The first, entitled "Squall," is brisk and energetic, like a coastal breeze blowing from the West. It is represented by the string section which soars in dense clouds of pitch clusters. "Zephyr" is calm and light, like a cold and bitter Northern wind. The percussion propels the motion in a subtle and delicate fashion. The third wind is a warm, sweltering Southern wind, featuring richly orchestrated woodwind chorales; it is entitled "Sirocco," after the hot, dusty and humid Saharan wind. "Cyclone" is the final wind that blows from the East. Its mood is unrelenting, fierce and overpowering; it features the brass as apocalyptic messengers

Analyticity and the Isgur-Wise Function

We reconsider the recent derivation by de Rafael and Taron of bounds on the slope of the Isgur-Wise function. We argue that one must be careful to include cuts starting below the heavy meson pair production threshold, arising from heavy quark-antiquark bound states, and that if such cuts are properly accounted for then no constraints may be derived.Comment: 8 pages, uses harvmac, SLAC-PUB-5956, UCSD/PTH 92-35, CALT-68-183

Building a Bicycle-Powered Centrifuge

Centrifuges are very common instruments utilized in research and clinical settings. The purpose of a centrifuge is to separate the components of a mixture using centrifugal force. An example of a process that utilizes centrifugation is the acquisition of a hematocrit, where red blood cells are separated from blood plasma and the other cellular components. Industrial centrifuges are expensive and generally employed in academic or clinical contexts. A bicycle centrifuge, on the contrary, may be designed and implemented in more generalized settings. Moreover, a bicycle centrifuge affords the opportunity to relate principles in physics to concepts specific to other scientific disciplines, such as biology and kinesiology

Excited Heavy Baryons and Their Symmetries I: Formalism

This is the first of two papers to study a new emergent symmetry which connects orbitally excited heavy baryons to the ground states in the combined heavy quark and large $N_c$ limit. The existence of this symmetry is shown in a model-independent way, and different possible realizations of the symmetry are discussed. It is also proved that this emergent symmetry commutes with the large $N_c$ spin-flavor symmetry.Comment: 20 pages in REVTe

Gene flow from single and stacked herbicide-resistant rice (\u3ci\u3eOryza sativa\u3c/i\u3e): Modeling occurrence of multiple herbicide-resistant weedy rice

Background: Provisia™ rice (PV), a non-genetically engineered (GE) quizalofop-resistant rice, will provide growers with an additional option for weed management to use in conjunction with Clearfield® rice (CL) production. Modeling compared the impact of stacking resistance traits versus single traits in rice on introgression of the resistance trait to weedy rice (also called red rice). Common weed management practices were applied to 2-, 3- and 4-year crop rotations, and resistant and multiple-resistant weedy rice seeds, seedlings and mature plants were tracked for 15 years. Results: Two-year crop rotations resulted in resistant weedy rice after 2 years with abundant populations (exceeding 0.4 weedy rice plants m–2) occurring after 7 years. When stacked trait rice was rotated with soybeans in a 3-year rotation and with soybeans and CL in a 4-year rotation, multiple-resistance occurred after 2–5 years with abundant populations present in 4–9 years. When CL rice, PV rice, and soybeans were used in 3- and 4-year rotations, the median time of first appearance of multiple-resistance was 7–11 years and reached abundant levels in 10–15 years. Conclusion: Maintaining separate CL and PV rice systems, in rotation with other crops and herbicides, minimized the evolution of multiple herbicide-resistant weedy rice through gene flow compared to stacking herbicide resistance traits

Hydraulic Model Study of the Stilling Basin with a Baffled Chute

MWH Americas, Inc

\u3cem\u3ePseudomonas aeruginosa\u3c/em\u3e reverse diauxie is a multidimensionl, optimized, resource utilization strategy

Pseudomonas aeruginosa is a globally-distributed bacterium often found in medical infections. The opportunistic pathogen uses a different, carbon catabolite repression (CCR) strategy than many, model microorganisms. It does not utilize a classic diauxie phenotype, nor does it follow common systems biology assumptions including preferential consumption of glucose with an ‘overflow’ metabolism. Despite these contradictions, P. aeruginosa is competitive in many, disparate environments underscoring knowledge gaps in microbial ecology and systems biology. Physiological, omics, and in silico analyses were used to quantify the P. aeruginosa CCR strategy known as ‘reverse diauxie’. An ecological basis of reverse diauxie was identified using a genome-scale, metabolic model interrogated with in vitro omics data. Reverse diauxie preference for lower energy, nonfermentable carbon sources, such as acetate or succinate over glucose, was predicted using a multidimensional strategy which minimized resource investment into central metabolism while completely oxidizing substrates. Application of a common, in silico optimization criterion, which maximizes growth rate, did not predict the reverse diauxie phenotypes. This study quantifies P. aeruginosa metabolic strategies foundational to its wide distribution and virulence including its potentially, mutualistic interactions with microorganisms found commonly in the environment and in medical infections