4,347 research outputs found
Southern California partyboat sampling study Quarterly Report no. 8
Between April 1 and June 30, 1977, 125 trips were
sampled aboard southern California partyboats by Department
personnel. A total of 14,842 fishes belonging to 72 species was identified and measured. Otoliths were
removed from 134 rockfish carcasses representing 20
species for age deterination studies.
The 10 most common species sampled during the quarter
accounted for 76.9% of the catch. Individually, the most
common were Pacific mackerel, Scomber japonicus (16.9%);
kelp bass, Paralabrax clathratus (14.5%); bocaccio, Sebastes paucispinis (11.4%); Pacific bonito, Sarda chiliensis (10.3%); barred sand bass, Paralabrax nebulifer (5.6%); olive rockfish, Sebastes serranoides (5.3%); chilipepper, S. goodei (4.0%); California barracuda, Sphyraena argentea (2.9%); and ocean whitefish, Caulolatilus princeps (2.8%).
Fishing effort switched from "rockcod" to surface
activity as it did during the second quarter of 1976 (26pp.
Bond Formation in Electrosorbates
The electrosorption valency y is defined and its meaning is
thoroughly discussed. Exiptl. dent. of y is demonstrated for systems
Au/Bi3+ and Pt/Cu2+. It is found that for homonuclear ions in aq.
solns. the ratio y/z, where z stands for Nernst valency, is successfully
correlated with the electro.negativity difference I XM - Xs I of
the electrode metal M and the sorbate S. For small electronegativity
differences, y/z •is close to unity indicating large covalency.
Bond formation in electrosorbates in non-aq. solvents and at single
crystal plames of various orientations are briefly discussed
Two tone response of radiofrequency signals using the voltage output of a Superconducting Quantum Interference Filter
In the presence of weak time harmonic electromagnetic fields, Superconducting
Quantum Interference Filters (SQIFs) show the typical behavior of non linear
mixers. The SQIFs are manufactured from high-T_c grain boundary Josephson
junctions and operated in active microcooler. The dependence of dc voltage
output V_dc vs. static external magnetic field B is non-periodic and consists
of a well pronounced unique dip at zero field, with marginal side modulations
at higher fields. We have successfully exploited the parabolic shape of the
voltage dip around B=0 to mix quadratically two external time harmonic
rf-signals, at frequencies f_1 and f_2 below the Josephson frequency f_J, and
detect the corresponding mixing signal at f_1-f_2. When the mixing takes place
on the SQIF current-voltage characteristics the component at 2f_2 - f_1 is
present. The experiments suggest potential applications of a SQIF as a
non-linear mixing device, capable to operate at frequencies from dc to few GHz
with a large dynamic range.Comment: 10 pages, 3 Figures, submitted to J. Supercond. (as proceeding of the
HTSHFF Symposium, June 2006, Cardiff
Enhancement of the ferromagnetic order of graphite after sulphuric acid treatment
We have studied the changes in the ferromagnetic behavior of graphite powder
and graphite flakes after treatment with diluted sulphuric acid. We show that
this kind of acid treatment enhances substantially the ferromagnetic
magnetization of virgin graphite micrometer size powder as well as in graphite
flakes. The anisotropic magnetoresistance (AMR) amplitude at 300 K measured in
a micrometer size thin graphite flake after acid treatment reaches values
comparable to polycrystalline cobalt.Comment: 3.2 pages, 4 figure
Bond Formation in Electrosorbates
The electrosorption valency y is defined and its meaning is
thoroughly discussed. Exiptl. dent. of y is demonstrated for systems
Au/Bi3+ and Pt/Cu2+. It is found that for homonuclear ions in aq.
solns. the ratio y/z, where z stands for Nernst valency, is successfully
correlated with the electro.negativity difference I XM - Xs I of
the electrode metal M and the sorbate S. For small electronegativity
differences, y/z •is close to unity indicating large covalency.
Bond formation in electrosorbates in non-aq. solvents and at single
crystal plames of various orientations are briefly discussed
La coleccion de Centrosema de CIAT: Datos de pasaporte basicos y distribucion geografica del germoplasma en la coleccion de CIAT
Se presentan los datos de pasaporte basicos de la coleccion de Centrosema del CIAT: no. de acceso, fuente, institucion colaboradora, origen, fecha de coleccion y registro, y mapas de la distribucion geografica de las 29 especies que conforman la coleccion. (CIAT
The direct evaluation of attosecond chirp from a streaking measurement
We derive an analytical expression, from classical electron trajectories in a
laser field, that relates the breadth of a streaked photoelectron spectrum to
the group-delay dispersion of an isolated attosecond pulse. Based on this
analytical expression, we introduce a simple, efficient and robust procedure to
instantly extract the attosecond pulse's chirp from the streaking measurement.Comment: 4 figure
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