The Takagi problem on the disk and bidisk

We give a new proof on the disk that a Pick problem can be solved by a rational function that is unimodular on the unit circle and for which the number of poles inside the disk is no more than the number of non-positive eigenvalues of the Pick matrix. We use this method to find rational solutions to Pick problems on the bidisk

Isostaticity in two dimensional pile of rigid disks

We study the static structure of piles made of polydisperse disks in the rigid limit with and without friction using molecular dynamic simulations for various elasticities of the disks and pile preparation procedures. The coordination numbers are calculated to examine the isostaticity of the pile structure. For the frictionless pile, it is demonstrated that the coordination number converges to 4 in the rigid limit, which implies that the structure of rigid disk pile is isostatic. On the other hand, for the frictional case with the infinite friction constant, the coordination number depends on the preparation procedure of the pile, but we find that the structure becomes very close to isostatic with the coordination number close to 3 in the rigid limit when the pile is formed through the process that tends to make a pile of random configuration.Comment: 3 pages, 3 figures, Submitted to J. Phys. Soc. Jp

Estimated Surface Motions of the Earth's Core

Estimated surface fluid motions of earth core, and rotational and irrotational flow dat

Variable frequency microwave (VFM) processing facilities and application in processing thermoplastic matrix composites

Microwave processing of materials is a relatively new technology advancement alternative that provides new approaches for enhancing material properties as well as economic advantages through energy savings and accelerated product development. Factors that hinder the use of microwaves in materials processing are declining, so that prospect for the development of this technology seem to be very promising. The two mechanisms of orientation polarisation and interfacial space charge polarisation, together with dc conductivity, form the basis of high frequency heating. Clearly, advantages in utilising microwave technologies for processing materials include penetration radiation, controlled electric field distribution and selective and volumetric heating. However, the most commonly used facilities for microwave processing materials are of fixed frequency, e.g. 2.45 GHz. This paper presents a state-of-the-art review of microwave technologies, processing methods and industrial applications, using variable frequency microwave (VFM) facilities. This is a new alternative for microwave processing

Comparison of estimates of surface fluid motions of the earth's core various epochs

Method of determining velocity of surface fluid motions of earth core for various epoch

On the determination of surface motions of the earth's core

Surface motion of earth cor

Cost Effective Capture of multiple IQ streams for Phase Arrays

This paper introduces a new and affordable method of realising 10 IQ Software Defined receivers, and how to synchronise them. We first discuss the need for multiple IQ and the available techniques. We then introduce the RTL-SDR and Matlab as a very low cost prototype implementation of 10 IQ streams. This leads to the design and manufacture of a PCB to distribute a single clock to multiple RTL-SDRs. The required modifications to the RTL-SDRs to receive the distributed clock and other modifications to improve the overall performance are presented. We then describe how to attain raw IQ data and synchronise the receivers. Finally, we prove all 10 can maintain a phase lock over a frame of 7 seconds

Nature of surface flow in the earth's central core

Nonuniform fluid velocity effect at surface of earth core on nature of surface flo

Growth of a plant tissue culture in the gravity-free state semiannual status report, 1 oct. 1963 - 31 mar. 1964

Zero gravity effect on regeneration and normal growth of tobacco stem segment

Development of guayule (Parthenium argentatum) research in cell culture

Utilizing the lateral buds of known high rubber producing plants as explants in culture medium specifically designed to engender shoot development and to prevent callus formation, unlimited numbers of replicate plants can be produced. Each has the same genotype as the parent. This procedure has long been used to rid plants of virus, the latter generally does not occur in the embryonic tissues of the bud; it also, by virtue of its axenic nature, eliminates all microorganisms characteristic of the parent plant. Auxins were found essential to callus formation, but since the latter is known to bring about chromosomal aberrations, it was avoided. The cytokinin benzylaminopurine strongly stimulated shoot growth, and the number of regenerated buds on the inoculum was proportional to its concentration. These buds produced shoots several centimeters in length which were caused to root on medium containing indolebutyric acid. Transferred to the septic condition of soil, the plantlets were gradually brought into full sunlight where they showed a brief vegetative growth with production of mature leaves, and flowered