Statistics on Development Planning: The Future Requirements

This paper is presented at the Third National Convention on Statistics at the Philippine International Convention Center on December 13-14, 1982. It argues that while statistical system continues to evolve into more detailed and complex activities to satisfy the demand of data users, gaps still prevail. It provides a brief overview of the Philippine statistical system and suggests direction for future development planning.decentralization, data and statistics

Statistics on Development Planning: The Future Requirements

This paper is presented at the Third National Convention on Statistics at the Philippine International Convention Center on December 13-14, 1982. It argues that while statistical system continues to evolve into more detailed and complex activities to satisfy the demand of data users, gaps still prevail. It provides a brief overview of the Philippine statistical system and suggests direction for future development planning.decentralization, data and statistics

Strangelet spectra from type II supernovae

We study in this work the fate of strangelets injected as a contamination in the tail of a "strange matter-driven" supernova shock. A simple model for the fragmentation and braking of the strangelets when they pass through the expanding oxygen shell is presented and solved to understand the reprocessing of this component. We find that the escaping spectrum is a scaled-down version of the one injected at the base of the oxygen shell. The supernova source is likely to produce low-energy particles of $A \sim 100-1000$ quite independently of the initial conditions. However, it is difficult that ultrarrelativistic strangelets (such as the hypothetical Centauro primaries) can have an origin in those explosive events.Comment: RevTex file, 5 pp., no figure

A new method for one-stage hepatectomy for dogs

A method is described for one-stage complete hepatectomy in dogs with preservation of the inferior vena cava. The method can be done rapidly with minimal blood loss and has a low operative mortality. The maximum survival time compares favorably with other methods of hepatectomy. © 1959

The Strange Star Surface: A Crust with Nuggets

We reexamine the surface composition of strange stars. Strange quark stars are hypothetical compact stars which could exist if strange quark matter was absolutely stable. It is widely accepted that they are characterized by an enormous density gradient ($~10^{26}$ g/cm$^4$) and large electric fields at surface. By investigating the possibility of realizing a heterogeneous crust, comprised of nuggets of strange quark matter embedded in an uniform electron background, we find that the strange star surface has a much reduced density gradient and negligible electric field. We comment on how our findings will impact various proposed observable signatures for strange stars.Comment: 4 pages, 2 figure

Structure of Strange Dwarfs with Color Superconducting Core

We study effects of two-flavor color superconductivity on the structure of strange dwarfs, which are stellar objects with similar masses and radii with ordinary white dwarfs but stabilized by the strange quark matter core. We find that unpaired quark matter is a good approximation to the core of strange dwarfs.Comment: 8 pages 5 figures, J. Phys. G, accepte

Decay versus survival of a localized state subjected to harmonic forcing: exact results

We investigate the survival probability of a localized 1-d quantum particle subjected to a time dependent potential of the form $rU(x)\sin{\omega t}$ with $U(x)=2\delta (x-a)$ or $U(x)= 2\delta(x-a)-2\delta (x+a)$. The particle is initially in a bound state produced by the binding potential $-2\delta (x)$. We prove that this probability goes to zero as $t\to\infty$ for almost all values of $r$, $\omega$, and $a$. The decay is initially exponential followed by a $t^{-3}$ law if $\omega$ is not close to resonances and $r$ is small; otherwise the exponential disappears and Fermi's golden rule fails. For exceptional sets of parameters $r,\omega$ and $a$ the survival probability never decays to zero, corresponding to the Floquet operator having a bound state. We show similar behavior even in the absence of a binding potential: permitting a free particle to be trapped by harmonically oscillating delta function potential

Diffusive Ionization of Relativistic Hydrogen-Like Atom

Stochastic ionization of highly excited relativistic hydrogenlike atom in the monochromatic field is investigated. A theoretical analisis of chaotic dynamics of the relativistic electron based on Chirikov criterion is given for the cases of one- and three-dimensional atoms. Critical value of the external field is evaluated analitically. The diffusion coefficient and ionization time are calculated.Comment: 13 pages, latex, no figures, submitted to PR

Clustering with multiple receiving antennas in downlink FDD CoMP systems

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Validation of a Net Active Debris Removal Simulator within Parabolic Flight Experiment

Currently space debris is recognized as a major risk for space missions. In this frame it is involved the Patender project (Net parametric characterization and parabolic flight). The goal of this ESA funded activity (ending by March 2014) is to develop a confident mean to further investigate, develop and validate the concept of using nets for actively removing space debris of different characteristics. The net simulator will be validated in a parabolic flight experiment where microgravity conditions can be reached during some few tens of seconds. Different net shapes (pyramidal/planar) will be launched using a pneumatic-based dedicated mechanism in order to simulate the capture of a large space debris. High-speed motion cameras will record the experiment in order to allow the 3D reconstruction of the deployment and wrapping around the target phases and the validation of the software simulator