Southern California partyboat sampling study Quarterly Report no. 3

During the period January 1 to March 31, 1976, Department personnel made 139 sampling trips aboard southern California partyboats. A total of 22,122 fishes from 73 species was identified and measured. Otoliths were removed from 1,536 rockfish carcasses representing 31 species for use in age determination. Sampling personnel tagged and released 68 California barracuda, Sphyraena argentea, and 18 sablefish, Anoplopoma fimbria. The five most common species sampled during this period represented approximately 79% of the total number of fishes measured. These were, in order of importance; bocaccio, Sebastes paucispinis; chilipepper, Sebastes goodei; olive rockfish, Sebastes serranoides; greenspotted rockfish, Sebastes chlorostictus; and vermilion rockfish, Sebastes miniatus. Bocaccio alone accounted for 52% of the sampled catch. (15pp.

Age composition of California barracuda, Sphyraena argentea; Pacific bonito, Sarda chiliensis; White seabass, Cynoscion nobilis; and Yellowtail, Seriola dorsalis from Southern California partyboats 1972-1974

Partyboats were sampled during the months of May through October 1972-1974 to collect length frequency data for California barracuda, Sphyraena argentea; Pacific bonito, Sarda chiliensis; white seabass, Cynoscion nobilis; and yellowtail, Seriola dorsalis. Age-length keys were applied to the data to estimate the age composition of each species and an analysis of variance was performed on the results. Ratio estimates were also computed to examine the variation due to month and port complex. The project provided background data for current stock assessments of these species. (Document has 25 pages.

Analysis of polarizability measurements made with atom interferometry

We present revised measurements of the static electric dipole polarizabilities of K, Rb, and Cs based on atom interferometer experiments presented in [Phys. Rev. A 2015, 92, 052513] but now re-analyzed with new calibrations for the magnitude and geometry of the applied electric field gradient. The resulting polarizability values did not change, but the uncertainties were significantly reduced. Then we interpret several measurements of alkali metal atomic polarizabilities in terms of atomic oscillator strengths $f_{ik}$, Einstein coefficients $A_{ik}$, state lifetimes $\tau_{k}$, transition dipole matrix elements $D_{ik}$, line strengths $S_{ik}$, and van der Waals $C_6$ coefficients. Finally, we combine atom interferometer measurements of polarizabilities with independent measurements of lifetimes and $C_6$ values in order to quantify the residual contribution to polarizability due to all atomic transitions other than the principal $ns$-$np_J$ transitions for alkali metal atoms.Comment: 23 pages, 9 figures, 6 table

Determination of energy-loss factors for slow electrons in hot gases Final report, 28 Apr. 1966 - 15 Aug. 1969

Determination of energy loss factors for slow electrons in hot gase

A non-existence result for a generalization of the equations of the conformal method in general relativity

The constraint equations of general relativity can in many cases be solved by the conformal method. We show that a slight modification of the equations of the conformal method admits no solution for a broad range of parameters. This suggests that the question of existence or non-existence of solutions to the original equations is more subtle than could perhaps be expected.Comment: minor changes from previous versio

The practical implementation of fatigue requirements to military aircraft and helicopters in the United Kingdom

The methods adopted in the United Kingdom to ensure the structural integrity of military aeroplanes and helicopters from the fatigue point of view are described. The procedure adopted from the writing of the specification to the monitoring of fatigue life in service are presented along with the requirements to be met and the way in which they are satisfied. Some of the outstanding problems that remain to be solved are indicated