17,639 research outputs found
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.
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
Southern California partyboat sampling study Quarterly Report no. 1
Estimates of the total yearly catch from the partyboat fishery have been collected and published on a routine
basis since 1935. Important data relating to the size and age composition of this segment of the marine sportfishery have been lacking. As a consequence, a southern California partyboat sampling study was initiated on April 1, 1975. The main objective of this sampling is to identify and measure all fishes taken by sportsmen on partyboats
with primary emphasis given to California barracuda, Sphyraena argentea; yellowtail, Seriola dorsalis; white seabass, Cynoscion nobilis; and rockfishes, Sebastes spp. (22pp.
Southern California partyboat sampling study Quarterly Report No. 4
From 1 April through 30 June, 1976, Department
personnel made 146 trips aboard southern California
partyboats. A total of 18,218 fishes from 76 species
was identified and measured.
Otoliths were removed from 674 rockfish carcasses
for use in age determination studies.
The 10 most common species sampled during this
quarter represented 85.2% of the total number of fishes
measured. These were, in order of importance: bocaccio,
Sebastes paucispinis; kelp bass, Paralabrax clathratus;
Pacific bonito, Sarda chiliensis; barred sand bass,
Paralabrax nebulifer; chilipepper, Sebastes goodei;
California barracuda, Sphyraena argentea; olive rockfish;
Sebastes serranoides; white croaker, Genyonemus lineatus;
ocean whitefish, Caulolatilus princeps; and vermilion
rockfish, Sebastes miniatus.
Pacific bonito and California barracuda partyboat
landings exceeded those of the entire 1975 season, and
sampling data indicate the average length of barracuda
caught from partyboats was significantly larger than
that of the previous season. (15pp.
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.
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
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 , Einstein coefficients , state lifetimes
, transition dipole matrix elements , line strengths
, and van der Waals coefficients. Finally, we combine atom
interferometer measurements of polarizabilities with independent measurements
of lifetimes and values in order to quantify the residual contribution to
polarizability due to all atomic transitions other than the principal
- transitions for alkali metal atoms.Comment: 23 pages, 9 figures, 6 table
- …