Nuclear structure calculations for neutron-star crusts

The goal of this paper is to investigate properties of clusterized nuclear matter which is believed to be present in crusts of neutron stars at subnuclear densities. It is assumed that the whole system can be represented by the set of Wigner-Seitz cells, each containing a nucleus and an electron background under the condition of electroneutrality. The nuclear structure calculations are performed within the relativistic mean-field model with the NL3 parametrization. The first set of calculations is performed assuming the constant electron background. The evolution of neutron and proton density distributions was systematically studied along isotopic chains until very neutron-rich system beyond the neutron dripline. Then we have replaced the uniform electron background with the realistic electron distributions, obtained within the Thomas-Fermi approximation in a self-consistent way with the proton distributions. Finally, we have investigated the evolution of the $\beta$-stability valley as well as neutron and proton driplines with the electron density.Comment: 21 pages, 14 figure

An investigation of error characteristics and coding performance

The performance of forward error correcting coding schemes on errors anticipated for the Earth Observation System (EOS) Ku-band downlink are studied. The EOS transmits picture frame data to the ground via the Telemetry Data Relay Satellite System (TDRSS) to a ground-based receiver at White Sands. Due to unintentional RF interference from other systems operating in the Ku band, the noise at the receiver is non-Gaussian which may result in non-random errors output by the demodulator. That is, the downlink channel cannot be modeled by a simple memoryless Gaussian-noise channel. From previous experience, it is believed that those errors are bursty. The research proceeded by developing a computer based simulation, called Communication Link Error ANalysis (CLEAN), to model the downlink errors, forward error correcting schemes, and interleavers used with TDRSS. To date, the bulk of CLEAN was written, documented, debugged, and verified. The procedures for utilizing CLEAN to investigate code performance were established and are discussed

The hepta-β-glucoside elicitor-binding proteins from legumes represent a putative receptor family

The ability of legumes to recognize and respond to β-glucan elicitors by synthesizing phytoalexins is consistent with the existence of a membrane-bound β-glucan-binding site. Related proteins of approximately 75 kDa and the corresponding mRNAs were detected in various species of legumes which respond to beta-glucans. The cDNAs for the beta-glucan-binding proteins of bean and soybean were cloned. The deduced 75-kDa proteins are predominantly hydrophilic and constitute a unique class of glucan-binding proteins with no currently recognizable functional domains. Heterologous expression of the soybean beta-glucan-binding protein in tomato cells resulted in the generation of a high-affinity binding site for the elicitor-active hepta-β-glucoside conjugate (K-d = 4.5 nM). Ligand competition experiments with the recombinant binding sites demonstrated similar ligand specificities when compared with soybean. In both soybean and transgenic tomato, membrane-bound, active forms of the glucan-binding proteins coexist with immunologically detectable, soluble but inactive forms of the proteins. Reconstitution of a soluble protein fraction into lipid vesicles regained beta-glucoside-binding activity but with lower affinity (K-d = 130 nM). We conclude that the beta-glucan elicitor receptors of legumes are composed of the 75 kDa glucan-binding proteins as the critical components for ligand-recognition, and of an as yet unknown membrane anchor constituting the plasma membrane-associated receptor complex

Brazilian elements in Villa-Lobos\u27s Assobio a Jato

Heitor Villa-Lobos was particularly lauded for creating a unique Brazilian style of art music. He imbued in his works a flavor of the many facets and cultures of Brazilian life, from the jungles of the Amazon to the street musicians of Rio de Janeiro. One of his late works, a piece entitled Assobio a Jato (The Jet Whistle), demonstrates this Brazilian flavor, even though the composition was written later in Villa-Lobos\u27s life when the Brazilian element was not so obvious as in his earlier works. The purpose of this paper is to present a brief background about Villa-Lobos and an overview of Brazilian popular and folk music. Further, a discussion about how Villa­ Lobos incorporated this music into his own compositions follows, and an analysis of Assobio a Jato with regard to its elements of Brazilian music concludes the paper

Dreaming of Eden: A Sociological Inquiry into Sacred Selves and Public Places

A diverse literature from several different disciplines addresses the issues of identity, settings and spirituality. This paper focuses upon drawing these traditions together in order to understand the relationship from a more holistic perspective, and to discern to what degree the three domains interact in a sociological sense. Several hypotheses are tested to discover if setting influences the salience of people’s spiritual identity or the levels of their spiritual transcendence, as well as whether or not age, controlling for other factors, explains or influences these two aspects of spiritual expression. Findings indicate that neither setting nor age significantly influence identity salience. Religious affiliation and sex are found to have significant relationships to spiritual identity salience. Additional findings indicate that while setting does not significantly influence transcendence, age and other controlling factors do have significant relationships to levels of transcendence. Several methods are used to test the hypotheses, including the McNemar Ratio, Ordinal Logistic Regression of Maximum Likelihoods, and OLS regression. Concluding comments suggest directions for future research

The Influence of Religious Homogeneity upon Life Expectancy: A Cross-National Comparative Analysis

Research upon health and life expectancy has focused primarily upon individual and community level analyses, with extrapolations to national level data. In this study, the unit of analysis is shifted from individual health statistics to the national level. Life expectancy data for every nation and in the world (total n=191, restricted n=138) is explored, controlling for a variety of socio-economic factors. Two hypotheses are tested which offer the explanation homogeneity in both religion (H1) and ethnicity (H2), determines differences in life expectancy between nations. The first hypothesis, that religious homogeneity supports positive health outcomes is supported. The second hypothesis, that ethnic homogeneity supports positive health outcomes, is not. Several explanations for the role of religion in promoting positive health, as measured by life expectancy, are noted and discussed

Kinetic energy budgets in areas of intense convection

A kinetic energy budget analysis of the AVE-SESAME 1 period which coincided with the deadly Red River Valley tornado outbreak is presented. Horizontal flux convergence was found to be the major kinetic energy source to the region, while cross contour destruction was the major sink. Kinetic energy transformations were dominated by processes related to strong jet intrusion into the severe storm area. A kinetic energy budget of the AVE 6 period also is presented. The effects of inherent rawinsonde data errors on widely used basic kinematic parameters, including velocity divergence, vorticity advection, and kinematic vertical motion are described. In addition, an error analysis was performed in terms of the kinetic energy budget equation. Results obtained from downward integration of the continuity equation to obtain kinematic values of vertical motion are described. This alternate procedure shows promising results in severe storm situations

The Error Probability Of Reed-Solomon Coding And Interleaving On A Bursty-noise Channel

A useful bursty-noise channel model is proposed and, using this model, a binary communication system using Reed-Solomon coding and interleaving is analyzed. The model includes both thermal noise, which gives rise to random errors, and burst noise, which gives rise to error bursts. Error probabilities are derived for the uncoded system, and error probability bounds are derived for the coded system. Monte Carlo simulation results agree well with theory

The Performance of Reed-Solomon Codes on a Bursty-Noise Channel

The performance of a Reed-Solomon coded binary communication system on a bursty-noise channel is considered. Bursty noise is defined to be background Gaussian noise plus burst noise, where burst noise is defined to be a series of finite-duration Gaussian-noise pulses with fixed duration and Poisson occurrence times. Using the noise model, along with ideal symbol interleaving, decoded bit-error probability bounds are derived for the case where the noise bursts are long with respect to the channel symbol rate. Specific performance results are presented for the (31,15,8) Reed-Solomon Joint Tactical Distribution System (JTIDS) code with a Binary Phase Shift Keyed (BPSK) modulation scheme. Simulation results are presented and they compare well with the theoretical results. © 1995 IEE