Wrinkling of Orthotropic Viscoelastic Membranes

This paper presents a simplified simulation technique for orthotropic viscoelastic films. Wrinkling is detected by a combined stress-strain criterion and an iterative scheme searches for the wrinkle angle using a pseudo-elastic material stiffness matrix based on a nonlinear viscoelastic constitutive model. This simplified model has been implemented in ABAQUS/Explicit and is able to compute the behavior of a membrane structure by superposition of a small number of response increments. The model has been tested against a published solution for a time-independent isotropic membrane under simple shear and also against experimental results on StratoFilm 420 under simple shear

POLOCALC: a Novel Method to Measure the Absolute Polarization Orientation of the Cosmic Microwave Background

We describe a novel method to measure the absolute orientation of the polarization plane of the CMB with arcsecond accuracy, enabling unprecedented measurements for cosmology and fundamental physics. Existing and planned CMB polarization instruments looking for primordial B-mode signals need an independent, experimental method for systematics control on the absolute polarization orientation. The lack of such a method limits the accuracy of the detection of inflationary gravitational waves, the constraining power on the neutrino sector through measurements of gravitational lensing of the CMB, the possibility of detecting Cosmic Birefringence, and the ability to measure primordial magnetic fields. Sky signals used for calibration and direct measurements of the detector orientation cannot provide an accuracy better than 1 deg. Self-calibration methods provide better accuracy, but may be affected by foreground signals and rely heavily on model assumptions. The POLarization Orientation CALibrator for Cosmology, POLOCALC, will dramatically improve instrumental accuracy by means of an artificial calibration source flying on balloons and aerial drones. A balloon-borne calibrator will provide far-field source for larger telescopes, while a drone will be used for tests and smaller polarimeters. POLOCALC will also allow a unique method to measure the telescopes' polarized beam. It will use microwave emitters between 40 and 150 GHz coupled to precise polarizing filters. The orientation of the source polarization plane will be registered to sky coordinates by star cameras and gyroscopes with arcsecond accuracy. This project can become a rung in the calibration ladder for the field: any existing or future CMB polarization experiment observing our polarization calibrator will enable measurements of the polarization angle for each detector with respect to absolute sky coordinates.Comment: 15 pages, 5 figures, Accepted by Journal of Astronomical Instrumentatio

Relativistic astrophysics

The design, experimental testing, and calibration (error analysis) of a high resolution Cerenkov-scintillation detector is presented. The detector is capable of detecting iron isotopes and heavy ions of cosmic rays, and of performing direct measurements of individual neighboring isotopes at charge resolution 26. It utilizes Lexan (trademark) sheets, and has been used in flight packages of balloons and on the Skylab. The detector will be able to provide more information on violet astrophysical processes, such as thermonuclear reactions on neutron stars. Ground support and display equipment which are to be used in conjunction with the detector are also discussed

Utah v. Salvador Ayala : Brief of Appellant

Appeal from the Judgment of the Third Judicial District Court, Salt Lake County, Honorable Homer F. Wilkinso

Upper Atmosphere Research Satellite (UARS): A program to study global ozone change

A general overview of NASA's Upper Atmosphere Research Satellite (UARS) program is presented in a broad based informational publication. The UARS will be responsible for carrying out the first systematic, comprehensive study of the stratosphere and will furnish important new data on the mesosphere and thermosphere. The UARS mission objectives are to provide an increased understanding of energy input into the upper atmosphere; global photochemistry of the upper atmosphere; dynamics of the upper atmosphere; coupling among these processes; and coupling between the upper and lower atmosphere. These mission objectives are briefly described along with the UARS on-board instrumentation and related data management systems

Utah v. Salvador Ayala : Brief of Respondent

APPEAL FROM A CONVICTION OF UNLAWFUL POSSESSION OF A CONTROLLED SUBSTANCE WITH INTENT TO DISTRIBUTE FOR VALUE, A SECOND DEGREE FELONY, IN VIOLATION OF UTAH CODE ANN. § 58-37-8(1)(a)(ii) (1953, AS AMENDED) AFTER A TRIAL IN THE THIRD JUDICIAL DISTRICT COURT, IN AND FOR SALT LAKE COUNTY, STATE OF UTAH, THE HONORABLE HOMER F. WILKINSON, JUDGE, PRESIDING

The State of Utah, Plaintiff/ Appellee, v. Matthew James Hinmon, Defendant/ Appellant.

Appeal from a judgment of conviction for Possession of a Controlled Substance, a third degree felony, in violation of Utah Code §58-37-8(2)(a)(i), (b)(ii), and Interference with Arresting Officer, a class B misdemeanor, in violation of Utah Code §76-8-305, in the Third Judicial District, in and for Salt Lake County, State of Utah, the Honorable Charlene Barlow presiding

State of Utah v. Willie Mae Walker : Brief of Respondent

Appeal from the Judgment of the Third Judicial District Court, in and for Salt Lake County, State of Utah, the Honorable Peter F. Leary, Judge