CND0/2 Calculation of Dipole Moments of trans-1,2-Dipyridylethylenes

Recently, the dipole moments of the six isomeric trans-1,2-dipyridylethylenes (DPE) have been reported1• With the exception of 1,2-di-(pyridyl-4)-ethylene (4,4-DPE) all isomers can exist in several configurations depending on the relative position of the two nitrogen atoms. Thus, for the six trans-isomers, 15 non-identical configurations are possible2 (Fig. 1). In the determination and discussion of the observed dipole moment, the knowledge of the amount of each configuration present in the measured sample is of great importance. Two procedures have so far been used to obtain this information

Mechatronic design of a fast and long range 4 degrees of freedom humanoid neck

This paper describes the mechatronic design of a humanoid neck. To research human machine interaction, the head and neck combination should be able to approach the human behavior as much as possible. We present a novel humanoid neck concept that is both fast, and has a long range of motion in 4 degrees of freedom (DOFs). This enables the head to track fast objects, and the neck design is suitable for mimicking expressions. The humanoid neck features a differential drive design for the lower 2 DOFs resulting in a low moving mass and the ability to use strong actuators. The performance of the neck has been\ud optimized by minimizing backlash in the mechanisms, and by using gravity compensation. Two cameras in the head are used for scanning and interaction with the environment

A combinatorial smoothness criterion for spherical varieties

We suggest a combinatorial criterion for the smoothness of an arbitrary spherical variety using the classification of multiplicity-free spaces, generalizing an earlier result of Camus for spherical varieties of type $A$.Comment: 14 pages, 2 table

CNDO Calculations on Benzylideneaniline

CND0/2 calculations lead to a conformation for trans-N-benzylideneaniline in agreement with most of the previous theoretical and experimental results. The electron exicitation spectrum calculated after optimization of the bond lengths by the CNDOS method accords well with the experimental spectrum in respect of the position of the electron transitions

Research study of some RAM antennas Final report, 18 Nov. 1964 - 18 Jun. 1965

Input impedance and radiation pattern determinations for cylindrical gap, waveguide excited and circular waveguide slot antenna array

Classification of double flag varieties of complexity 0 and 1

A classification of double flag varieties of complexity 0 and 1 is obtained. An application of this problem to decomposing tensor products of irreducible representations of semisimple Lie groups is considered

Anomaly Matching Conditions and the Moduli Space of Supersymmetric Gauge Theories

The structure of the moduli space of N=1 supersymmetric gauge theories is analyzed from an algebraic geometric viewpoint. The connection between the fundamental fields of the ultraviolet theory, and the gauge invariant composite fields of the infrared theory is explained in detail. The results are then used to prove an anomaly matching theorem. The theorem is used to study anomaly matching for supersymmetric QCD, and can explain all the known anomaly matching results for this case.Comment: 28 pages revtex, amssym

Bayesian model-independent evaluation of expansion rates of the universe

Marginal likelihoods for the cosmic expansion rates are evaluated using the `Constitution' data of 397 supernovas, thereby updating the results in some previous works. Even when beginning with a very strong prior probability that favors an accelerated expansion, we obtain a marginal likelihood for the deceleration parameter $q_0$ peaked around zero in the spatially flat case. It is also found that the new data significantly constrains the cosmographic expansion rates, when compared to the previous analyses. These results may strongly depend on the Gaussian prior probability distribution chosen for the Hubble parameter represented by $h$, with $h=0.68\pm 0.06$. This and similar priors for other expansion rates were deduced from previous data. Here again we perform the Bayesian model-independent analysis in which the scale factor is expanded into a Taylor series in time about the present epoch. Unlike such Taylor expansions in terms of redshift, this approach has no convergence problem.Comment: To appear in Astrophysics and Space Scienc

A study of pulse propagation of electromagnetic signals through the solar corona

Solar probe to measure radial variation of electron density in solar coron

The Connection Between the Adjacency Matrix and the Boundary Code of Benzenoid Hydrocarbons

An algorithm for setting up adjacency matrices of benzenoid hydrocarbons from their boundary sequences is detailed. A recipe for computing the boundary code of a benzenoid structure from its adjacency matrix is also given. Finally, an automatic procedure is devised for computing approximate TRE values of benzenoids from their boundary sequences via the Gutman-Petrovic formulae