6,934 research outputs found
Laser pyrometry
A method of determining the emissivity of a hot target from a laser-based reflectance measurement which is conducted simultaneously with a measurement of the target radiance is described. Once the correct radiance and emissivity are determined, one calculates the true target temperature from these parameters via the Planck equations. The design and performance of a laser pyrometer is described. The accuracy of laser pyrometry and the effect of ambient radiance are addressed
The finite Bruck Loops
We continue the work by Aschbacher, Kinyon and Phillips [AKP] as well as of
Glauberman [Glaub1,2] by describing the structure of the finite Bruck loops. We
show essentially that a finite Bruck loop is the direct product of a Bruck
loop of odd order with either a soluble Bruck loop of 2-power order or a
product of loops related to the groups , or a
Fermat prime. The latter possibillity does occur as is shown in [Nag1, BS]. As
corollaries we obtain versions of Sylow's, Lagrange's and Hall's Theorems for
loops.Comment: 15 page
Games of status and discriminatory contracts
Following recent empirical evidence which indicates the importance of rank for the determination of workers' wellbeing, this paper introduces status seeking preferences in the form of rank-dependent utility functions into a moral
hazard framework with one firm and multiple workers, but no correlation in production. We show that workers' concern for the rank of their wage in the firm's wage distribution induces the firm to offer discriminatory wage contracts when its aim is to induce all workers to expend effort
On Bruck Loops of 2-power Exponent
The goal of this paper is two-fold. First we provide the information needed
to study Bol, or Bruck loops by applying group theoretic methods. This
information is used in this paper as well as in [BS3] and in [S]. Moreover, we
determine the groups associated to Bruck loops of 2-power exponent under the
assumption that every nonabelian simple group is either passive or
isomorphic to \PSL_2(q), a -power. In a separate paper it is
proven that indeed every nonabelian simple group is either passive or
isomorphic to \PSL_2(q), a -power [S]. The results obtained
here are used in [BS3], where we determine the structure of the groups
associated to the finite Bruck loops.Comment: 26 page
The states 1^1\Sigma^+_u, 1^1\Pi_u and 2^1\Sigma^+_u of Sr_2 studied by Fourier-transform spectroscopy
A high resolution study of the electronic states 1^1\Sigma^+_u and 1^1\Pi_u
which belong to the asymptote 4^1D + 5^1S and of the state 2(A)^1\Sigma^+_u,
which correlates to the asymptote 5^1P + 5^1S, is performed by
Fourier-transform spectroscopy of fluorescence progressions induced by single
frequency laser excitation. Precise descriptions of the potentials up to 2000
cm^{-1} above the bottom are derived and compared to currently available ab
initio calculations. Especially for the state 1^1\Sigma^+_u large deviations
are found. Rather weak and local perturbations are observed for the states
1^1\Pi_u and 2^1\Sigma^+_u, while a strong coupling of the state 1^1\Sigma^+_u
to the component \Omega=0^+_u of the state 1^3\Pi_u, which belongs to the
asymptote 5^3P + 5^1S, is indicated.Comment: Typing errors corrected (including numbers in table IX), 12 pages, 9
figure
Nodular Sarcoidosis Masquerading as Cancer.
Nodular lung disease is a rare pulmonary manifestation of sarcoidosis and resembles metastatic neoplasm disease. Nodular sarcoidosis is rare, varying from 1.6% to 4% of patients with sarcoidosis. Radiographic nodules measure from 1 to 5 cm in diameter that typically consist of coalescent granulomas. There is limited data on this form of sarcoidosis and its presentation can mimic primary or metastatic pulmonary neoplasms. Nodular sarcoidosis has a favorable prognosis, and resolution can be seen with oral corticosteroids. Herein, we present such a case of nodular pulmonary sarcoidosis with a lung nodule measured up to 6 cm
Games of Status and Discrininatory Contract
Following recent empirical evidence which indicates the importance of rank for the determination of workers’ wellbeing, this paper introduces status seeking preferences in the form of rank-dependent utility functions into a moral hazard framework with one firm and multiple workers, but no correlation in production. Workers’ concern for the rank of their wage in the firm’s wage distribution may induce the firm to offer discriminatory wage contracts when its aim is to induce all workers to expend effort.
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