Digital Commons Network^™

The Things You Can’T Ignore: Evolving A Sub-Arcsecond Star Tracker, John Enright, Doug Sinclair, Tom Dzamba

Small Satellite Conference

The feasibility of a star tracker with 1 arc-second accuracy and 1 deg/sec slew capability is explored, using the ST-16 design as a starting point. Whole-sky simulation is used to determine the impact of optical design on the star tracker availability. The current optical calibration process is examined, and shown to be inadequate for the desired performance. Additional factors that become important at high accuracy are examined. These are detector calibration, temperature variation, chromatic aberration, stellar aberration and proper motion. Plausible methods of dealing with each of these are presented.

Investigating The Use Of Miniaturized Electrodynamic Tethers To Enhance The Capabilities Of Femtosatellites And Other Ultra-Small Satellites, Iverson Bell, Brian Gilchrist, Sven Bilén, Jesse Mcternan

Small Satellite Conference

The success of nanospacecraft and the evolution of the millimeter-scale wireless sensors concept (i.e., “SmartDust”) have generated interest in smaller spacecraft, both as stand-alone satellites and elements in a swarm or maneuverable fleet. However, so-called flat ChipSats proposed as complete spacecraft fabricated on semiconductor wafers or other larger pico- and femtosatellite, highly integrated architectures have an inherently high area-to-mass ratio, and this can result in a short orbital life in low Earth orbit (LEO) due to atmospheric drag. In this paper, we summarize trade studies in which we investigate the use of a very short (few meters), semi-rigid electrodynamic (ED) …

Cadet: A High Data Rate Software Defined Radio For Smallsat Applications, Edward Kneller, Kevin Hyer, Todd Mcintyre, David Jones, Charles Swenson

Small Satellite Conference

The government and private sectors are showing more interest in SmallSats for a wider range of missions. However, mission planners are discovering that even relatively simple missions are generating significant amounts of data, and that a communication infrastructure that supports high data rates must be considered early in mission conceptualization and project planning. In answer to these emerging communication needs, L-3 Communications, in conjunction with Utah State University – Space Dynamics Laboratory, developed the Cadet Radio for the Dynamic Ionosphere CubeSat Experiment (DICE) space weather program. DICE was successfully launched in October 2011, and the Cadet radios are currently down-linking …

Counting Down To The Launch Of Popacs (Polar Orbiting Passive Atmospheric Calibration Spheres), Walter Holemans, R. Gilbert Moore, Jin Kang

Small Satellite Conference

The main objective of Project POPACS (Polar Orbiting Passive Atmospheric Calibration Spheres) is to measure the changes in density of the auroral zone upper atmosphere, in response to various solar stimuli, such as flares and CMEs. The mission consists of deploying three 10 cm diameter Aluminum spheres into an elliptical polar orbit and tracking them as they make repeated perigee passes in the upper atmosphere, with special emphasis on perigee passes within both the northern and southern auroral zones. The spheres have identical external dimensions and surface compositions, and thus identical drag coefficients, but they have different masses (1, 1.5, …

Advanced Mems Components In Closed-Loop Micro Propulsion Applications, Pelle Rangsten, Johan Bejhed, Håkan Johansson, Maria Bendixen, Kerstin Jonsson, Tor-Arne Grönland

Small Satellite Conference

This paper presents recent advances in the development of two MEMS (Micro Electro Mechanical Systems) components suitable for small satellite propulsion applications. First a cold gas MEMS thruster with proportional and closed-loop thrust control and secondly a Xenon flow control module for precision control of extremely low flow rates to Ion engines. The development of these products is ongoing but recent achievements have demonstrated that besides miniaturization also unique performance and functionality can be achieved. The components are described in terms of design, manufacturing, and test results. The flow control module can regulate flows in the range of 5-50 μg/s …

Comparison Of Control Moment Gyros And Reaction Wheels For Small Earth-Observing Satellites, Ronny Votel, Doug Sinclair

Small Satellite Conference

Multi-ton Earth-observing spacecraft have traditionally used control moment gyros (CMGs) to store momentum and to generate the large torques required for fast slew maneuvers. Small 3-axis controlled satellites, by contrast, will typically use cheaper and simpler reaction wheels to perform the same functions. The question then arises: which actuator is better suited for an Earth-observing mission? This paper compares the performance of each actuator subject to identical agile pointing requirements, and identifies the operating conditions in which one actuator outperforms the other.

Research Metrics, Chaouki Abdallah

Publications of the Provost's Office

The State of New Mexico is currently funding UNM and other state institutions using a base budget, topped by funds due to outcome measures that include course completion, degrees awarded, STEMH degrees and degrees earned by students at risk measured by their Pell grant eligibility.

Improving The Quantitative Assessment Of Intraretinal Features By Determining Both Structural And Optical Properties Of The Retinal Tissue With Optical Coherence Tomography, Wei Gao

Open Access Dissertations

The goal of this project is to obtain quantitative assessments of intraretinal features by determining the structural and optical properties of retinal tissue with optical coherence tomography. To accomplish this goal, structural and optical properties, in addition to thickness measurements, were extracted from OCT-based images and were used for the discrimination of DM eyes with and without DR from healthy eyes. First, structural parameters including the thickness, fractal dimension, energy, entropy, correlation and contrast were evaluated for each intraretinal layer using various image processing techniques such as speckle noise removal, retinal segmentation and blood vessel shadow removal. In addition, optical …

Gsu View, 2012-08-16, Office Of Marketing And Communications

GSU View

Newsletter published by Governors State University 2007-current.

08-16-2012 Swosu Plans Reception And Orientation For International Students, Southwestern Oklahoma State University

THE BARK ARCHIVE 2012

A welcome back reception is being planned for international students at Southwestern Oklahoma State University on Friday, August 24, on the Weatherford campus.

Employing Critical Thinking In The Power Of Persuasion, Steven C. Bahls

Speeches and Statements

No abstract provided.

Elkin, Gwendolyn, 1916-2009 (Sc 2596), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid only for Manuscripts Small Collection 2596. Holographic paper titled “Joel Tanner Hart” by Gwendolyn Elkin, Bowling Green, Kentucky. Biographical paper highlights Hart’s life, career and techniques as an sculptor.

August 16, 2012: Experiments In Unbelief, Bruce Ledewitz

Hallowed Secularism

Blog post, “ Experiments in Unbelief“ discusses politics, theology and the law in relation to religion and public life in the democratic United States of America.

Lytle, William (Sc 2605), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid only for Manuscripts Small Collection 2605. Bound typescript paper titled “George H. Lorimer, a Study of Lorimer, the Magnificent” written by William Lytle. Paper details the life and career of Lorimer, editor of The Saturday Evening Post.

Hays, William Shakespeare, 1837-1907 (Sc 2603), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid only for Manuscripts Small Collection 2603. Chiefly typescript copies of letters from William Shakespeare Hays, Louisville, Kentucky, to Jess and Sue Barkley, Greenville, Kentucky, and a few selected poems. Poems include "Insured", "Sunday Morning", "Eli's Thanksgiving", etc. Also included is general biographical information about Hays.

Board Of Trustees - Bardstown, Kentucky (Sc 2567), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid only for Manuscripts Small Collection 2567. Bound copy of the Board of Trustees record from Bardstown, Kentucky from 1782-1826. Copied from original papers by Sisters of Nazareth, Nazareth, Kentucky.

Facebook Ipo Lockup Expiration, Steven D. Dolvin

All Chapters

When a firm undertakes an IPO, insiders (owners and venture capitalists, among others) agree to retain their shares (i.e., lockup) for a period of time, typically six months. When the lockup period expires, it is customary to see a large block of shares flood the market, having an adverse effect on the stock's price. Facebook just hit its lockup expiration. See article here, NY Times.

Fox, John William, Jr., 1862-1919 (Sc 2600), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid only for Manuscripts Small Collection 2600. Bound volume of letters chiefly from John W. Fox, Jr., New York City, to Micajah Fible, Louisville, Kentucky. Fox writes of topics including his career in journalism and mutual friends.

Mccullock, Sue R. (Sc 2566), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid only for Manuscripts Small Collection 2566. Bound copy of “History of Owensboro, Kentucky,” compiled by Sue R. McCullock. This history includes the early settlement of Daviess County, important citizens, industry, organizations, and general information about Owensboro in the eighteenth and nineteenth centuries.

Vernon Terry Collection Pays Homage To America's Political Passion, Winthrop University

Winthrop News 2012

• A Sign of the Times: the Vernon Terry Political Signature and Memorabilia Collection offers documentation from some of the 44 men who have held the office of president.
• Some of the former presidents whose signatures are included are Abraham Lincoln, Thomas Jefferson and Andrew Jackson.
• Archives is open from 8:30 a.m.-5 p.m. Monday-Friday at 700 Cherry Road in Rock Hill.

Ua80/1 Meeting Minutes, W Club

University Organizations

Minutes of August 2012 W Club Board of Directors meeting regarding athletics at Western Kentucky University.

Ua80/1 Meeting Minutes, W Club

University Organizations

Meeting agenda and minutes for August 2012 meeting of the W Club Board of Directors.

Usfsp College Of Business Study Details Economic Impact Of Dolphin Tale, August 16, 2012, Tom Scherberger

USF St. Petersburg Campus News and Press Releases

No abstract provided.

Locust Dynamics: Behavioral Phase Change And Swarming, Chad M. Topaz, Maria R. D'Orsogna, Leah Edelstein-Keshet, Andrew J. Bernoff

All HMC Faculty Publications and Research

Locusts exhibit two interconvertible behavioral phases, solitarious and gregarious. While solitarious individuals are repelled from other locusts, gregarious insects are attracted to conspecifics and can form large aggregations such as marching hopper bands. Numerous biological experiments at the individual level have shown how crowding biases conversion towards the gregarious form. To understand the formation of marching locust hopper bands, we study phase change at the collective level, and in a quantitative framework. Specifically, we construct a partial integrodifferential equation model incorporating the interplay between phase change and spatial movement at the individual level in order to predict the dynamics of …

08/16/2012 Obituary Records, Hawaii Obituaries

Obituaries

List of Obituaries for individuals who passed away on 08/16/2012. Scroll down to see the names and obituary description.

Pediatric Vancomycin Use In 421 Hospitals In The United States, 2008, Tamar Lasky, Jay Greenspan, Frank R. Ernst, M. Liliana Gonzalez

Computer Science and Statistics Faculty Publications

Background: Recommendations to prevent the spread of vancomycin resistance have been in place since 1995 and include guidelines for inpatient pediatric use of vancomycin. The emergence of large databases allows us to describe variation in pediatric vancomycin across hospitals. We analyzed a database with hospitalizations for children under 18 at 421 hospitals in 2008.

Methodology/Principal Findings: The Premier hospital 2008 database, consisting of records for 877,201 pediatric hospitalizations in 421 hospitals, was analyzed. Stratified analyses and logistic mixed effects models were used to calculate the probability of vancomycin use while considering random effects of hospital variation, hospital fixed …

The Quest For Universal Health Coverage: Achieving Social Protection For All In Mexico, Felicia Marie Knaul, Eduardo GonzáLez-Pier, Octavio GóMez-DantéS, David GarcíA-Junco, HéCtor Arreola-Ornelas, Mariana Barraza-LloréNs, Rosa Sandoval,, Francisco Caballero, Mauricio HernáNdez-Avila, Mercedes Juan, David Kershenobich, Gustavo Nigenda, Enrique Ruelas, Jaime SepúLveda, Roberto Tapia, Guillermo SoberóN, SalomóN Chertorivski, Julio Frenk

Aboriginal Policy Research Consortium International (APRCi)

Mexico is reaching universal health coverage in 2012. A national health insurance programme called Seguro Popular, introduced in 2003, is providing access to a package of comprehensive health services with financial protection for more than 50 million Mexicans previously excluded from insurance. Universal coverage in Mexico is synonymous with social protection of health. This report analyses the road to universal coverage along three dimensions of protection: against health risks, for patients through quality assurance of health care, and against the financial consequences of disease and injury. We present a conceptual discussion of the transition from labour-based social security to social …

State V. Moffat Respondent's Brief Dckt. 39026

Idaho Supreme Court Records & Briefs, All

No abstract provided.

State V. Brunet Appellant's Brief Dckt. 39550

Idaho Supreme Court Records & Briefs, All

No abstract provided.

Dean Announced For Gayle Bolt Price School Of Graduate Studies At Gardner-Webb, Office Of University Communications

Gardner-Webb NewsCenter Archive

Gardner-Webb University is pleased to announce that Dr. Jeff Rogers has been named Dean of the Gayle Bolt Price School of Graduate Studies. Rogers’ relationship with GWU began in 2004 when he was invited by the University to speak at its annual faculty retreat. Following that event, doors opened and opportunities grew at GWU for Rogers.