Diel variation in vertical distribution of an offshore ichthyoplankton community off the Oregon coast

We examined the diel ver-tical distribution, concentration, and community structure of ichthyoplank-ton from a single station 69 km off the central Oregon coast in the northeast Pacific Ocean. The 74 depth-stratified samples yielded 1571 fish larvae from 20 taxa, representing 11 families, and 128 fish eggs from 11 taxa within nine families. Dominant larval taxa were Sebastes spp. (rockfishes), Stenobra-chius leucopsarus (northern lampfish), Tarletonbeania crenularis (blue lan-ternfish), and Lyopsetta exilis (slender sole), and the dominant egg taxa were Sardinops sagax (Pacific sardine), Icichthys lockingtoni (medusafish), and Chauliodus macouni (Pacific viperfish). Larval concentrations generally increased from the surface to 50 m, then decreased with depth. Larval concentrations were higher at night than during the day, and there was evidence of larval diel vertical migration. Depth stratum was the most important factor explaining variability in larval and egg concentrations

Microbiology of water and wastewater: Discovery of a new genus numerically dominant in municipal wastewater and antimicrobial resistances in numerically dominant bacteria from Oklahoma lakes.

Three bacterial isolates from municipal wastewater were investigated for their phenotypic, biochemical, and molecular characters. All strains were isolated from municipal wastewater, and the type strain, NRS1T, was isolated as a numerically dominant heterotrophic bacterium. The isolates NRS1T, NRS30, and NRS32 were Gram-negative, catalase and oxidase positive, nonmotile, non spore-forming, yellow to orange pigmented rods. Pigments were of the carotenoid-type, and no flexirubin-type pigments were detected. All strains degraded gelatin, starch, esculin, casein, and weakly degraded DNA. None degraded cellulose, chitin, agar, urea, pectin, alginate, uric acid, xanthine, or hypoxanthine. Indole was produced by all strains. All strains were methyl red and Voges-Proskauer negative, and nitrate was not reduced. Pyruvate was observed as an end-product from growth on unbuffered glucose. The predominant respiratory quinone was menaquinone MK-6. The DNA base composition was 31 mole % G+C. 16S rRNA gene sequence analysis indicated that these three strains, as well as two uncharacterized strains, MRS7 and MRS14, were members of the Chryseobacterium-Bergeyella-Riemerella branch of the family Flavobacteriaceae. This bacterium could not be ascribed to any known genus by cellular fatty acid analysis or BIOLOG analysis. All strains were phylogenetically unaffiliated with any described genus from the 16S ribosomal gene sequence analysis. It is therefore proposed that the unknown bacterium be classified in a new genus Cloacibacterium gen. nov., as Cloacibacterium normanensis gen. nov. sp. nov. The type species of the genus Cloacibacterium is Cloacibacterium normanensis strain NRS1T (=ATCC BAA-825T) (=DSM 15886T) (=CCUG 46293T) (=CIP 108613 T). The GenBank accession number for the 16S gene sequence of strain NRS1T is AJ575430. The habitat for Cloacibacterium is municipal wastewater, where it was discovered as a numerically dominant species

Performance Analysis of a Hartman Wavefront Sensor Used for Sensing Atmospheric Turbulence Statistics

Atmospheric turbulence parameters, such as Fried\u27s coherence diameter, the outer scale of turbulence, and the turbulence power law, are related to the wavefront slope structure function (SSF). The SSF is defined as the second moment of the wavefront slope difference as a function of both time and position. Knowledge of the SSF allows turbulence parameters to be estimated. Hartmann wavefront sensor (H-WFS) slope measurements composed of both signal and noise, allow the SSF to be estimated by computing a mean square difference of H-WFS slope measurements. The quality of the SSF estimate is quantified by the signal-to-noise ratio (SNR) of the estimator. This thesis develops a theoretical SNR expression for the SSF estimator. This SNR is a function of H-WFS geometry, the number of temporal frames included in the estimate, the outer scale, power law, and temporal properties of the turbulence. Spatial slope correlations are incorporated. Temporal slope correlations are incorporated using Taylor\u27s frozen flow hypothesis. Results are presented for various H-WFS configurations and atmospheric turbulence properties

N-loop running should be combined with N-loop matching

We investigate the high-scale behaviour of Higgs sectors beyond the Standard Model, pointing out that the proper matching of the quartic couplings before applying the renormalisation group equations (RGEs) is of crucial importance for reliable predictions at larger energy scales. In particular, the common practice of leading-order parameters in the RGE evolution is insufficient to make precise statements on a given model's UV behaviour, typically resulting in uncertainties of many orders of magnitude. We argue that, before applying N-loop RGEs, a matching should even be performed at N-loop order in contrast to common lore. We show both analytical and numerical results where the impact is sizeable for three minimal extensions of the Standard Model: a singlet extension, a second Higgs doublet and finally vector-like quarks. We highlight that the known two-loop RGEs tend to moderate the running of their one-loop counterparts, typically delaying the appearance of Landau poles. For the addition of vector-like quarks we show that the complete two-loop matching and RGE evolution hints at a stabilisation of the electroweak vacuum at high energies, in contrast to results in the literature.Comment: 16 pages, 11 figures; v2: title changed, accepted for publication in PR