17,857 research outputs found

    Ocean shrimp report 1979 season

    Get PDF
    Statewide Pacific ocean shrimp, Pandalus jordani, landings totaled 2,237.7 mt (4,922,857 lb), down 3,745 mt (8,240,386 lb) from the 1978 catch of 5,983.3 mt (13,163,243 lb). The 1979 landings are the lowest since 1976 when 1,545.5 mt (3,400,191 lb) were landed. Area A (Eureka-Crescent City)landings dropped to 1,842.5 mt (4,053,605 lb) from 5,046.3 mt (11,101,895 lb) landed during the previous season. No landings were made in Area B-1 (Fort Bragg). Only 2.0 mt (4,385 lb) were reported caught in Area B-2 (Bodega Bay). Record landings of 393.1 mt (864,867 lb) were made in Area C (Morro Bay-Avila), surpassing the previous record of 90.4 mt (199,000 lb) landed in 1953. In Area A a record 71 vessels, 34 double-rigged and 37 single-rigged, shrimped during the season. Average catch per hour was a low .15 mt (338 lb) and .22 mt (490 1b) for single-rig and double-rig vessels, respectively. In Area C average catch per hour was .23 mt (508 lb) and .42 mt (924 lb) for single-rig and double-rig vessels, respectively. Area A shrimp catches were dominated by 1-year-old shrimp throughout most of the season. The age composition in Area C shifted predominately from 2-year-old shrimp in May and June to predominately 1-year-old shrimp in July, August, October, and November. Area A was closed for one month from July 15 to August 15 because closure criteria of less than .16 mt (350 lb) per hour for two consecutive weeks was met and year class composition exceeded 70% of 1-year-old shrimp. The season was closed October 14 when the catch per hour criterion was exceeded again. (18pp.

    A Pilot Study to Assess the Effects of Humor in Relationship to Teaching Effectiveness

    Get PDF
    In a 1968 work entitled, A Teacher is Many Things , Drs. Earl Pullias and James Young elaborated on the many qualities or roles often required by an instructor at the college/university level. A litany of these roles include qualities such as: guide, teacher, searcher, counsellor, creator, evaluator, knowledge . authority, emancipator, learner, facer of reality, and culminator, to name a few. Two of the roles mentioned in their book, storyteller and actor , might appear to be unnecessary, or even questionable in their suitability for such a list. How does storytelling and acting relate to being an effective teacher? According to Pullias and Young, storytelling provides the student with a sense of place and identity and the ability to discover ... how others have solved problems similar to their own, .. .learn to appreciate their own lives ... feel inferior ... superior ... be repelled or inspired (1968, p. 161). As an actor, the individual plays the role of a teacher, developing ways to carefully stage the learning moment for the class, a role the individual maintains throughout the time he/she is on stage before his/her students. Thus, the classroom professor assumes the role of an edutainer (Zemke, 1991). The professor functions both as an educator and entertainer on the learning stage

    Measurement and Calculation of Absolute Single and Multiple Charge Exchange Cross Sections for Fe^(q+) Ions Impacting H_2O

    Get PDF
    Charge exchange (CE) plays a fundamental role in the collisions of solar- and stellar-wind ions with lunar and planetary exospheres, comets, and circumstellar clouds. Reported herein are absolute cross sections for single, double, triple, and quadruple CE of Fe^(q+) (q = 5-13) ions with H_2O at a collision energy of 7q keV. One measured value of the pentuple CE is also given for Fe^(9+) ions. An electron cyclotron resonance ion source is used to provide currents of the highly charged Fe ions. Absolute data are derived from knowledge of the target gas pressure, target path length, and incident and charge-exchanged ion currents. Experimental cross sections are compared with new results of the n-electron classical trajectory Monte Carlo approximation. The radiative and non-radiative cascades following electron transfers are approximated using scaled hydrogenic transition probabilities and scaled Auger rates. Also given are estimates of cross sections for single capture, and multiple capture followed by autoionization, as derived from the extended overbarrier model. These estimates are based on new theoretical calculations of the vertical ionization potentials of H_2O up to H_2O^(10+)

    Spin injection from perpendicular magnetized ferromagnetic δ\delta-MnGa into (Al,Ga)As heterostructures

    Full text link
    Electrical spin injection from ferromagnetic δ\delta-MnGa into an (Al,Ga)As p-i-n light emitting diode (LED) is demonstrated. The δ\delta-MnGa layers show strong perpendicular magnetocrystalline anisotropy, enabling detection of spin injection at remanence without an applied magnetic field. The bias and temperature dependence of the spin injection are found to be qualitatively similar to Fe-based spin LED devices. A Hanle effect is observed and demonstrates complete depolarization of spins in the semiconductor in a transverse magnetic field.Comment: 4 pages, 3 figure

    Monopolelike probes for quantitative magnetic force microscopy: calibration and application

    Full text link
    A local magnetization measurement was performed with a Magnetic Force Microscope (MFM) to determine magnetization in domains of an exchange coupled [Co/Pt]/Co/Ru multilayer with predominant perpendicular anisotropy. The quantitative MFM measurements were conducted with an iron filled carbon nanotube tip, which is shown to behave like a monopole. As a result we determined an additional in-plane magnetization component of the multilayer, which is explained by estimating the effective permeability of the sample within the \mu*-method.Comment: 3 pages, 3 figure

    Topics concerning state variable feedback in automatic control systems. Part 1 - Specification. Part 2 - Sensitivity. Part 3 - Intentional nonlinearities. Part 4 - Unavailable states

    Get PDF
    Specifications, sensitivity, intentional nonlinearities, and unavailable states concerned with state variable feedback in automatic control system

    Ash Hollow Historical Park

    Full text link
    corecore