Radiant Emission Characteristics of Diffuse Conical Cavities

Radiant-energy emission of diffuse conical cavitie

Thermal Radiation Absorption in Rectangular-Groove Cavities

Thermal radiation absorption in rectangular-groove cavitie

Absorption and Emission Characteristics of Diffuse Spherical Enclosures

The thermal radiation characteristics of spherical cavities are of practical interest in connection with the absorption of radiant energy for both space-vehicle and terrestrial applications. Also, spherical cavities are of potential use as sources of black-body energy. The purpose of this brief paper is to determine both the absorption and emission characteristics of spherical cavities which are diffuse reflectors and emitters

Radiobiological studies of plants orbited in biosatellite 2

Radiation induced mutation rates and cyotlogical changes in plants orbited on Biosatellite

Observations on chytridiaceous parasites of phanerogams

A. Physoderma found parasitic on Asclepias incarnata L. is noteworthy for the behavior of its zoospores from epibiotic sporangia. These, which bore either a colorless or ochraceous salmon colored globule, apparently lacked the capacity to produce new epibiotic sporangia and exhibited a marked tendency to fuse in pairs. The fate of the fused product could not be followed directly. Seedlings exposed to these, however, eventually had formed within them the polycentric endobiotic system bearing resting spores. The latter germinated after dehiscence of a lid. There is some evidence for believing the fungus is confined to Asclepias .Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46148/1/203_2004_Article_BF00691061.pd

Observations On Chytridiaceous Parasites Of Phanerogams. Xi. A Physoderma On Agropyron Repens

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141220/1/ajb211721.pd

Scaling and synchronization in a ring of diffusively coupled nonlinear oscillators

Chaos synchronization in a ring of diffusively coupled nonlinear oscillators driven by an external identical oscillator is studied. Based on numerical simulations we show that by introducing additional couplings at $(mN_c+1)$-th oscillators in the ring, where $m$ is an integer and $N_c$ is the maximum number of synchronized oscillators in the ring with a single coupling, the maximum number of oscillators that can be synchronized can be increased considerably beyond the limit restricted by size instability. We also demonstrate that there exists an exponential relation between the number of oscillators that can support stable synchronization in the ring with the external drive and the critical coupling strength $\epsilon_c$ with a scaling exponent $\gamma$. The critical coupling strength is calculated by numerically estimating the synchronization error and is also confirmed from the conditional Lyapunov exponents (CLEs) of the coupled systems. We find that the same scaling relation exists for $m$ couplings between the drive and the ring. Further, we have examined the robustness of the synchronous states against Gaussian white noise and found that the synchronization error exhibits a power-law decay as a function of the noise intensity indicating the existence of both noise-enhanced and noise-induced synchronizations depending on the value of the coupling strength $\epsilon$. In addition, we have found that $\epsilon_c$ shows an exponential decay as a function of the number of additional couplings. These results are demonstrated using the paradigmatic models of R\"ossler and Lorenz oscillators.Comment: Accepted for Publication in Physical Review

Polarization, directional distribution, and off-specular peak phenomena in light reflected from roughened surfaces

Surface roughness and incident angle effect on angular distribution, polarization, and specular peak of reflected thermal radiatio

Comparison of X-ray and gamma-ray dose-response curves for pink somatic mutations in Tradescantia clone 02

Microdosimetric data indicate that the mean specific energy,zeta, produced by individual charged particles from X rays and gamma rays is different for the two radiation qualities by nearly a factor of two. In order to test whether this influences the initial, linear component in the dose-effect relations, a comparison was made between dose-response curves for pink somatic mutations inTradescantia clone 02 stamen hairs following X and gamma irradiations. Absorbed doses ranged from 2.66 to 300 rad. The results are in agreement with predictions made on the basis of microdosimetric data. At low doses gamma rays are substantially less effective than X rays. The RBE of gamma rays vs. X rays at low doses was approximately 0.6, a value lower than those usually reported in other experimental systems