589 research outputs found
"Shears, I. May 25, 2017. Half models, Rocky Harbour. "
No full textHalf models for one schooner (top right) and three cabin cruisers owned by Irving Shears and made by his father George Gordon Shears. Discussed in Shears, I. May 25, 2017. Jeremy Harnum interviewing Irving Shears, Rocky Harbour
Shears, I. May 25, 2017. Jeremy Harnum interviewing Irving Shears, Rocky Harbour.
No full textBiographical info; Experience with boat building; Growing up in rocky harbour - work and play; common boats used in Rocky Harbour; went to Labrador when 12 years old for 6 weeks with father and postmaster; commercial boat building; mechanical outfitting of longliners built by others; types of boats and boat designs; types of wood used in boat building; harvesting timber; boat moulds and half model; boat design; dories and regional boat use; work history; engines; folklore and superstitions surrounding the moon, boats and fishing; and lobster fishing. Discussion moves to shed to see half models depicted in image file Shears, I. May 25, 2017. Half models, Rocky Harbour. Mr. Shears also discusses the Northern Ranger coastal boat, schooners and cabin cruisers
Discussion of “Comparison of Base Shears Estimated from Floor Accelerations and Column Shears”
No full textIn lieu of a provided abstract, the first paragraph is provided:
The author agrees with Dr. Pinho about difficulties associated with the use of different damping models in nonlinear dynamic analysis. However, the focus of the original manuscript was to illustrate the difference between base shear estimated from floor accelerations, denoted as inertial base shear, and base shear estimated from column shears, denoted as the structural base shear. The difference between the two base shears exists regardless of the damping model used in the nonlinear analysis. In order to illustrate this conclusion, the Los Angeles building of the original manuscript (Goel 2011) was re-analyzed for Earthquake No. 15 using two different Rayleigh damping models: C = α0m + α1kinitial, in which the stiffness-proportional component is proportional to the initial elastic stiffness, kinitial, and C = α0m + α1kcurrent, in which the stiffness-proportional component is proportional to the current stiffness, kcurrent
Relativistic mean field description for the shears band mechanism in Rb-84
No full textFor the first time, the relativistic mean field (RMF) model is applied to the shears band recently observed in Rb-84(37). Signals of the appearance of the shears mechanism, such as smooth decreases of the shears angle and of the B(M1)/B(E2) ratio while keeping the nearly constant tilt angle, are well reproduced. Thus it is shown that the microscopic RMF model can nicely describe the shears band in this nucleus.Physics, NuclearSCI(E)72ARTICLE6null6
Is there a role for synthetic biology in addressing the transition to a new low‐carbon energy system?
No full text
Holomorphic automorphisms of Danielewski surfaces I - density of the group of overshears
No full textWe define the notion of shears and overshears on a Danielewski surface. We show that the group generated by shears and overshears is dense (in the compact open topology) in the path-connected component of the identity of the holomorphic automorphism group.The research of the first author was partially supported by Schweizerische Nationalfonds grant No 200020-124668/1. The research of the second author was supported by Forskarskolan for Matematik och Berakningsvetenskap FMB
Outburst Behaviour of the Dwarf Nova CG Draconis
No full textDuring the British Astronomical Association (BAA) 2022 campaign, 27436
photometric observations of the dwarf nova (DN) CG Draconis were made, with 106
eclipses recorded. This work summarizes the new data available and provides
updated ephemeris and commentary on the observed eclipse profiles. The orbital
period found is P_orb = 4h31m38s +/- 1s. Two types of quasi-periodic outbursts
are identified: normal outbursts, of Delta V of approximately 1.25 mag
amplitude, and bright, of Delta V of approximately 1.5 mag. The pattern
resembles superoutbursts of SU UMa-type DNe, however, no presence of superhumps
characterizing these DNe was found. Given CG Dra is located above the period
gap, it may represent a new intermediary subtype between SS Cyg and SU UMa-type
stars, or provide support to superoutburst models that do not rely on eccentric
accretion disks.Comment: Accepted for publication in Astronomische Nachrichte
Probability density functions of extreme wave- and current forces on fixed spaceframe offshore structures
No full textRandom wave and current forces acting on an offshore structure, cause random base shear forces in time. The peak base shear is the maximum value of base shear that occurs during the passage of a wave. The extreme base shear is the maximum value of base shear that occurs within a period of time, say one hour. So far, the distributions of extreme base shear forces acting on jacket type structures were calculated numerically. Time domain simulations of base shear were generated for the jacket type offshore structure by means of a computer program, using the Morison equation on every member segment. Extreme base shears could be sampled from these time records of base shear forces. By simulating a storm over a period significantly greater than one hour, say sixty hours, histograms of extreme base shear could be developed. These computer simulations cause high computer costs. This study investigates a method to develop probability density functions of extreme base shears acting on a jacket-type offshore structure. A probability density function of extreme base shears acting on a single vertical cylindrical column structure was derived analytically in the past. The probability density function for a single column is used to obtain the probability density functions for a jacket-type offshore structure. The complex jacket-type offshore structure is represented by a number of vertical cylindrical columns which cause equivalent wave and current forces.Hydraulic EngineeringCivil Engineering and Geoscience
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