Descriptions of new fishes from Panama

The following preliminary descriptions are of new fishes obtained by the authors during their first season's work on the Biological Survey of the Canal Zone, the ichthyological work of which is being conducted cooperatively by the Field Museum of Natural History and the Smithsonian Institution. (2 page document

MODELLING OF DISCUS-FLIGHT

The previous theoretical considerations about gyro stability of the discus are not in agreement with practical observations. Thus there exist a theoretical deficit about our understanding of discus flight and therefore our desire, to set up new tables of throw distances as a function of initial values and wind forces. A 3D-model of the discus flight is developed

Estimating a Collective Household Model with Survey Data on Financial Satisfaction

We estimate a collective household model with survey data on financial satisfaction from the European Community Household Panel. Our estimates suggest that cohabitating individuals enjoy returns to scale in consumption that are towards the larger end of the range of estimates reported in the literature. They also suggest that the share of household income provided by the female partner is a significant determinant of her share of household consumption in most of the countries we study.consumption, returns to scale, collective household models

Spin currents in superconductors

It is argued that experiments on rotating superconductors provide evidence for the existence of macroscopic spin currents in superconductors in the absence of applied external fields. Furthermore it is shown that the model of hole superconductivity predicts the existence of such currents in all superconductors. In addition it is pointed out that spin currents are required within a related macroscopic (London-like) electrodynamic description of superconductors recently proposed. The spin current arises through an intrinsic spin Hall effect when negative charge is expelled from the interior of the metal upon the transition to the superconducting state

Volume 8. Article 2. A review of the American anchovies (Family Engraulidae).

https://elischolar.library.yale.edu/bulletin_yale_bingham_oceanographic_collection/1128/thumbnail.jp

A Free Man of Color and His Hotel: Race, Reconstruction, and the Role of the Federal Government

Digging Deeper into Reconstruction James Wormley was a wealthy and well-connected hotel owner in the nation’s capitol from the time of the administration of Ulysses S. Grant through that of Chester A. Arthur. In this informative and engaging brief volume, Carol Gelderman tells the stor...

Far-Infrared Spectral Energy Distributions and Photometric Redshifts of Dusty Galaxies

We infer the large-scale source parameters of dusty galaxies from their observed spectral energy distributions (SEDs) using the analytic radiative transfer methodology presented in Chakrabarti & McKee (2005). For local ultra-luminous infrared galaxies (ULIRGs), we show that the millimeter to far-infrared (FIR) SEDs can be well fit using the standard dust opacity index of 2 when self-consistent radiative transfer solutions are employed, indicating that the cold dust in local ULIRGs can be described by a single grain model. We develop a method for determining photometric redshifts of ULIRGs and sub-mm galaxies from the millimeter-FIR SED; the resulting value of $1+z$ is typically accurate to about 10%. As such, it is comparable to the accuracy of near-IR photometric redshifts and provides a complementary means of deriving redshifts from far-IR data, such as that from the upcoming $\it{Herschel Space Observatory}$. Since our analytic radiative transfer solution is developed for homogeneous, spherically symmetric, centrally heated, dusty sources, it is relevant for infrared bright galaxies that are primarily powered by compact sources of luminosity that are embedded in a dusty envelope. We discuss how deviations from spherical symmetry may affect the applicability of our solution, and we contrast our self-consistent analytic solution with standard approximations to demonstrate the main differences.Comment: 37 pages, 14 Figures, 3 Tables, submitted to ApJ. submitted to Ap

ANGULAR MOMENTUM IN JUMPS WITH ROTATIONS ON THE LONGITUDINAL AXIS IN FIGURE SKATING -3D-ANALYSES AND COMPUTER SIMULATION

INTRODUCTION -In analyses of athletic technique in figure skating primarily jumps with tripie or four-time rotations on the longitudinal axis are considered The quality of these jumps is essentially influenced by vertical momentum and angular momentum. While vertical momentum can be obtained without problems from flight parameters the calculation of angular momentum does represent a much more complicated problem. The task is to optimise vertical and angular momentum and to answer the question for reasons causing that the longitudinal axis is tilted during flight. This is important since a slightly tilled position of this axis can cause a fall in figure skating. Analyses of errors therefore mostly concentrate on the identification of reasons for this tilted position during flight already in the take-off. Therefore 3D monitoring only is insufficient for recommendations on sports techniques but additional 3D calculations (e.g. calculation and three-dimensional presentation of angular momentum) have to be performed. METHODS -A procedure for a threedimensional presentation of angular momentum as vector is presented. Using this procedure reasons for errors can be determined and general orientations for sport technical models can be characterised. Another procedure offers the opportunity to quantify the partial contribution of individual parts of the body in producing angular momentum. To determine the efficient use of the produced angular momentum 3D computer simulation is applied RESULTS 1. The influence of the angle between longitudinal axis and direction of angular momentum on the efficient use of the produced angular momentum is determined as a result of computer simulation 2 The influence of movements of individual parts of the body on the production of the total angular momentum as a reason for tilting the longitudinal axis during flight is studied. 3. We study practical applications in sports practice to present conclusions for the training of sports technique We give recommendations for individual solutions concerning sports technique res. general models to optimise sports technique of the most complicated technical elements. Using the example of the triple Axel, the most complicated triple jump in figure skating, we present opportunities for an interpretation of our results in sports practice

COMPUTATION OF HIP AND SHOULDER TORQUES IN COMPETITIVE SWIMMING

The mechanisms of propulsion can be deduced from 3D video analysis of swimming. The basic hydrodynamic equation can be used to compute the total force for those particles. The shoulder torque was calculated by summation over hand, lower arm and upper arm of infinitesimal torques of displaced water particles. These muscle force moments were related to the velocity of the mass centre as a measure of the propulsion. However, a direct interrelation between velocity and torques cannot be established since the total resistance of the body in motion is unknown. Therefore, the aim was to determine individual differences in swimming technique, controlled by shoulder, hip torques and swimming velocity, at any state of one movement cycle. Recommendations for best propulsion techniques are derived

Research Notes: Soybean seed β-amylase variants

Hildebrand and Hymowitz (1980a) reported that two soybean genotypes were found that lack detectable seed a- amylase activity . The cultivar \u27Chestnut\u27 produces an inactive a- amylase protein, Span (Hildebrand and Hymowitz , 1980b) ; \u27Altona\u27 is a mixture of genotypes that have a a-amylase protein of normal activity (sp1b) or lack it entirely (sp1) (Hildebrand and Hymowitz , 1980b) . Chestnut was selected from \u27Habaro\u27 and introduced into the U.S. as PI 20,405 in 1906 from Kharbarovsk, USSR (Hymowitz et al ., 1977)