First evaluation of the main parameters in the dynamics of the Small Expendable Deployer System (SEDS) for a tethered satellite

The dynamics of the motion of the Small Expendable Deployer System (SEDS) is studied by using a simplified model in which no external forces (except the gravity gradient field) are applied on the tethered body and the tether is assumed massless. The dynamics of SEDS operation is modeled as a sequence of two phases: the deployment phase and the swing phase. For the first one the velocity dependent forces are found to force the tether forward from the local vertical. When the deployment ends, Coriolis effects vanish and the swing phase begins, which is characterized by a wide free libration. The time duration as well as velocity, acceleration and tension of the tethered body are estimated for both deployment and swing phases

Photon + Jet production at sqrt{s}=1.96 TeV

Prompt photon production results by the CDF and D\OCollaborations in the Tevatron Run II at a center of mass energy of $\sqrt{s}$=1.96 TeV are presented. Cross sections for central isolated photons, photon+jet production and photons produced in association with a heavy flavor quark are reported. The measurements are compared to Next-to-Leading order perturbative QCD predictions.Comment: 4 pages, 6 figures, Proceedings for the QCD Session at Moriond 200

Pattern Research Project: An Investigation of The Pattern And Printing Process - Volute

2017 Pattern Research Project Abigail Deluca - Volute The Pattern Research Project involves research and analysis of contemporary patterns found in the textiles and wallcoverings of the built interior environment. Patterns use motif, repetition, color, geometry, craft, technology, and space to communicate place, time, and concept. Through this research and analysis, built environments - their designers, occupants, construction, and context - can be better understood. Abigail Deluca, VCU Interior Design BFA 2020, selected the Volute pattern for the 2017 Pattern Research Project. The text below is excerpted from the student’s work: “Volute references the design choices that reference Art Deco, the stylistic reaction to modernism that took off in the 1920’s and the mechanized age. Referencing both the periods political reform and machine. Its aesthetic is derived from the stylization of images rather than relying entirely on original forms. It is an abstraction based on social theory and modernism. Despite this, it was only described as modernistic by those trying to debase it and who carried a distaste for its commercially driven spread. Volute acknowledges the aesthetics of Art Deco while ignoring its ideologies. It romanticizes the tone of Art Deco’s decorative schemes: serious, logical, and welcoming. The source of its namesake and main form are likely taken from the metalwork of the period, however since volutes have appeared in art as early in ancient Greece this isn’t entirely clear.”https://scholarscompass.vcu.edu/prp/1011/thumbnail.jp

Eutectic bonding of sapphire to sapphire

Eutectic mixture of aluminum oxide and zirconium oxide provides new bonding technique for sapphires and rubies. Technique effectively reduces possibility of contamination. Bonding material is aluminum oxide and zirconium oxide mixture that matches coefficient of thermal expansion of sapphire

Bonding of sapphire to sapphire by eutectic mixture of aluminum oxide and zirconium oxide

Bonding of an element comprising sapphire, ruby or blue sapphire to another element of such material with a eutectic mixture of aluminum oxide and zirconium oxide is discussed. The bonding mixture may be applied in the form of a distilled water slurry or by electron beam vapor deposition. In one embodiment the eutectic is formed in situ by applying a layer of zirconium oxide and then heating the assembly to a temperature above the eutectic temperature and below the melting point of the material from which the elements are formed. The formation of a sapphire rubidium maser cell utilizing eutectic bonding is shown

The Hunt for Privacy Harms After \u3ci\u3eSpokeo\u3c/i\u3e

In recent years, due both to hacks that have leaked the personal information of hundreds of millions of people and to concerns about government surveillance, Americans have become more aware of the harms that can accompany the widespread collection of personal data. However, the law has not yet fully developed to recognize the concrete privacy harms that can result from what otherwise seems like ordinary economic activity involving the widespread aggregation and compilation of data. This Note examines cases in which lower federal courts have applied the Supreme Court’s directions for testing the concreteness of alleged intangible privacy injuries, and in particular how that inquiry has affected plaintiffs’ suits under statutes that implicate privacy concerns. This Note proposes that, in probing the concreteness of these alleged privacy harms, the courts, through the doctrine of standing, are engaging in work that could serve to revitalize the judiciary’s long-dormant analysis of the nature of privacy harms. It suggests that courts should look beyond the four traditional privacy torts to find standing for plaintiffs who bring claims against entities that collect and misuse personal information. This Note urges courts to make use of a nexus approach to identify overlapping privacy concerns sufficient for standing, which would allow the federal judiciary to more adequately address emerging privacy harms

Bonding of sapphire to sapphire by eutectic mixture of aluminum oxide and zirconium oxide

An element comprising sapphire, ruby or blue sapphire can be bonded to another element of such material with a eutectic mixture of aluminum oxide and zirconium oxide. The bonding mixture may be applied in the form of a distilled water slurry or by electron beam vapor deposition. In one embodiment the eutectic is formed in situ by applying a layer of zirconium oxide and then heating the assembly to a temperature above the eutectic temperature and below the melting point of the material from which the elements are formed. The formation of a sapphire rubidium maser cell utilizing eutectic bonding is shown

An Examination of Women\u27s Representation and Participation in Bicycle Advisory Committees in California, Research Report WP 11-03

In the United States, women bicycle at significantly lower rates than men. One method of remedying this disparity is to ensure that women are engaged in bicycle planning and policy making through, for example, participation in bicycle advisory committees (BACs). No research has been conducted on women’s representation and participation in these committees. This study attempts to fill that gap by examining women’s membership levels in and experiences serving on California bicycle advisory committees and bicycle/pedestrian advisory committees. In addition, we explore some of the barriers to participation faced by female cyclists. A survey of 42 committees revealed that women make up approximately 24% of members on an average bicycle (and pedestrian) advisory committee in California. Through focus group interviews with 24 women currently serving on BACs, several common themes emerged. Women on these committees are more likely than men to bring up women’s and children’s issues, and some aspects of the committees themselves may serve as barriers for women to become more involved. An online survey of 565 women cyclists in California provided insight regarding some of the common barriers women identify as reasons for not becoming involved with a BAC. Lack of awareness of the committees did not seem to be a barrier: 67% of respondents were aware of their local committee. Instead, barriers indentified by participants included: time; perceived lack of qualifications; lack of information about the committee; family and household responsibilities; and lack of interest. Recommendations to increase women’s representation on BACs include the following strategies: education about the committee; targeted recruitment efforts; and policy and procedural changes

Fitting and goodness-of-fit test of non-truncated and truncated power-law distributions

Power-law distributions contain precious information about a large variety of processes in geoscience and elsewhere. Although there are sound theoretical grounds for these distributions, the empirical evidence in favor of power laws has been traditionally weak. Recently, Clauset et al. have proposed a systematic method to find over which range (if any) a certain distribution behaves as a power law. However, their method has been found to fail, in the sense that true (simulated) power-law tails are not recognized as such in some instances, and then the power-law hypothesis is rejected. Moreover, the method does not work well when extended to power-law distributions with an upper truncation. We explain in detail a similar but alternative procedure, valid for truncated as well as for non-truncated power-law distributions, based in maximum likelihood estimation, the Kolmogorov-Smirnov goodness-of-fit test, and Monte Carlo simulations. An overview of the main concepts as well as a recipe for their practical implementation is provided. The performance of our method is put to test on several empirical data which were previously analyzed with less systematic approaches. The databases presented here include the half-lives of the radionuclides, the seismic moment of earthquakes in the whole world and in Southern California, a proxy for the energy dissipated by tropical cyclones elsewhere, the area burned by forest fires in Italy, and the waiting times calculated over different spatial subdivisions of Southern California. We find the functioning of the method very satisfactory.Comment: 26 pages, 9 figure