Digital Commons Network^™

Army Space Education: Closing The Gap With Operational Space , Thomas Pugsley

Small Satellite Conference

The Army has made great strides over the last decade to secure a solid foothold and reputation in the space community. Army space professionals have finally gained equity among their peers in the operational space community, and today we see a truly joint space cadre, dedicated to solving tough problems as a team. Unfortunately, the Army has done very little to try to gain equity with its peers concerning space education. This paper outlines the current state of Army Space education, attempting to identify the inequity of space education programs between the services, the impact of this iniquity, as well …

Frequency Reconfiguration Of A Small Array Enabled By Functionalized Dispersions Of Colloidal Material , Sean Goldberger, Frank Drummond, Rachel Anderson, Joel Barrera, Amy Bolon, Stephen Davis, Jamie Edelen, Justin Marshall, Cameron Peters, David Umana, Gregory Huff

Small Satellite Conference

This paper will discuss the performance and adaptability of a microfluidic reconfiguration mechanism in a small array. Discussion will also include its ability to reduce system degradation resulting from complexity and physical limitations incurred from the close spatial proximity of bias/control systems on or near the antenna. Implementation of the microfluidic mechanism can reduce or mitigate the interactions between individual mechanisms within the aperture and increase the competitiveness of microfluidics over current state-of-the-art. Research at Texas A&M University in conjunction with the Space Engineering Institute, has developed a novel frequency reconfiguration system for antennas using electromagnetically functionalized colloidal dispersions (EFCDs). …

Summer Mustang, August 13, 2009

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

Molecular Plasticity Of E-Cadherin And Sialyl Lewis X Expression, In Two Comparative Models Of Mammary Tumorigenesis, Salomé S. Pinho, Celso A. Reis, Fátima Gärtner, Mary L. Alpaugh

Publications and Research

Background The process of metastasis involves a series of steps and interactions between the tumor embolus and the microenvironment. Key alterations in adhesion molecules are known to dictate progression from the invasive to malignant phenotype followed by colonization at a distant site. The invasive phenotype results from the loss of expression of the E-cadherin adhesion molecule, whereas the malignant phenotype is associated with an increased expression of the carbohydrate ligand-binding epitopes, (e.g. Sialyl Lewis x/a) that bind endothelial E-selectin of the lymphatics and vasculature. Methodology Our study analyzed the expression of two adhesion molecules, E-cadherin and Sialyl Lewis x (sLex), …

Diversity And Strain Specificity Of Plant Cell Wall Degrading Enzymes Revealed By The Draft Genome Of Ruminococcus Flavefaciens Fd-1, Margret E. Berg Miller, Dionysios A. Antonopoulos, Mark Brand, Albert Bari, Alvaro Hernandez, Jyothi Thimmapuram, Bryan A. White, Marco Rincon, Harry J. Flint, Bernard Henrissat, Pedro M. Coutinho

Cyber Center Publications

Ruminococcus flavefaciens is a predominant cellulolytic rumen bacterium, which forms a multi-enzyme cellulosome complex that could play an integral role in the ability of this bacterium to degrade plant cell wall polysaccharides. Identifying the major enzyme types involved in plant cell wall degradation is essential for gaining a better understanding of the cellulolytic capabilities of this organism as well as highlighting potential enzymes for application in improvement of livestock nutrition and for conversion of cellulosic biomass to liquid fuels.

Getting To Know The River

News Releases

No abstract provided.

State V. Pokorney Appellant's Brief Dckt. 34945

Idaho Supreme Court Records & Briefs, All

No abstract provided.

Washington University Record, August 13, 2009

Washington University Record

No abstract provided.

Song Of The North Wind: A Story Of The Snow Goose, Paul A. Johnsgard, Paul Geraghty

Papers in Ornithology

As a boy in North Dakota, Paul Johnsgard measured his winters, not by conventional time units, but in the days it took for the snow geese to return from their wintering grounds to Lake Traverse. In early April, with hip boots, camera, and binoculars, he awaited the arrival of the first flocks from the Gulf of Mexico. Johnsgard was not alone in admiring the beauty and strength of the snow goose. For centuries this bird has signified the passing seasons to the Indians—its white feathers a symbol of the breath of life and a reminder of the roles the birds …

Distance Dependence Of Electron Transfer Kinetics For Azurin Protein Adsorbed To Monolayer Protected Nanoparticle Film Assemblies, Morgan Lynn Vargo, Chris P. Gulka, John K. Gerig, Christopher M. Manieri, Jonathan D. Dattelbaum, Carolyn B. Marks, Nathaniel T. Lawrence, Matthew L. Trawick, Michael C. Leopold

Chemistry Faculty Publications

The distance dependence and kinetics of the heterogeneous electron transfer (ET) reaction for the redox protein azurin adsorbed to an electrode modified with a gold nanoparticle film are investigated using cyclic voltammetry. The nanoparticle films are comprised of nonaqueous nanoparticles, known as monolayer-protected clusters (MPCs), which are covalently networked with dithiol linkers. The MPC film assembly serves as an alternative adsorption platform to the traditional alkanethiolate self-assembled monolayer (SAM) modified electrodes that are commonly employed to study the ET kinetics of immobilized redox proteins, a strategy known as protein monolayer electrochemistry. Voltammetric analysis of the ET kinetics for azurin adsorbed …

How Plastic Is Vendobionta Morphology? A Geometric Morphometric Study Of Two Groups Of Pteridinium From The Latest Neoproterozoic, Michael B. Meyer

USF Tampa Graduate Theses and Dissertations

The analysis and interpretation of Vendobionta morphology is critical to elucidating a range of issues about their ontogeny and evolution, as well as life habits. These analyses, however, are complicated because these organisms are often morphologically enigmatic and defy ready categorization within modern taxonomic schemes. This study delves into the morphology of one of these problematic groups: Pteridinium. Specimens were investigated from two localities, Namibia and North Carolina, using geometric morphometrics. The landmark data, which was analyzed to compare specimens based on locality, taphonomy, and preservation, were subjected to three statistical tests: Principle Components Analysis, Procrustes shape analyses, and …

The Iris Nanosatellite For Autonomous Multi-System Responsive Space Operations And High Spectral Resolution Earth Imaging, Erin Beck, Christopher Kitts, Jose Cruz, Alexander Fischer, Steven Li, Anothony Young

Small Satellite Conference

Santa Clara University's Robotic Systems Laboratory is developing the Intelligent Responsive Imaging Spacecraft (IRIS) for autonomous multi-system responsive operations and high spectral resolution Earth imaging. IRIS will interact with an extended system of land, sea, air, and space-based robotic and human elements to observe transient events on the ground. Specifically, IRIS will provide critical imaging and communications services to detect, monitor, and respond to harmful algal blooms in shallow water regions. Students are responsible for all aspects of development. This paper will describe the mission concept and its use of advanced small satellite technologies to perform multi-system responsive space operations.

Thin Wire Nucleate Boiling Of Water In Sustained Microgravity, Justin Koeln

Small Satellite Conference

The advancement of small satellite technology relies on the development of effective thermal management systems that can be made smaller, safer, and more robust. This paper presents the results and analysis of a nucleate boiling experiment in sustained microgravity aboard the Space Shuttle Endeavor (STS-108). Bubble growth and departure were observed from a single and a braid of three 0.16 mm diameter and 80 mm long nickel-chromium resistive wires. Analysis showed that the braided wire provides a unique surface configuration to enhance the onset of boiling. The braid of wires was also observed to produce several bubble explosions; this is …

Sattherm: A Thermal Analysis And Design Tool For Small Spacecraft , Cassandra Allison, Millan Diaz-Aguado, Belgacem Jaroux

Small Satellite Conference

Small spacecraft have become an attractive alternative for a significant class of space missions. They have the potential to provide valuable science data with shorter development times and at a reduced cost over traditional multi-instrument spacecraft. However, many of the legacy tools used for spacecraft design and analysis have considerable cost and complexity that are not suited to small spacecraft and their associated short development cycles. SatTherm is an alternative thermal analysis tool specifically developed for small spacecraft as a collaborative effort between the Mission Design Center at NASA Ames and San Jose State University. It is intended to be …

Development Of Biocompatible Polymer Monoliths For The Analysis Of Proteins And Peptides, Yun Li

Theses and Dissertations

Biocompatibility is an important issue for the development of chromatographic stationary phases for the analysis of biomolecules (including proteins and peptides). A biocompatible stationary phase material is a material that resists nonspecific adsorption of biomolecules and does not interact with them in a way that would alter or destroy their structures or biochemical functions. The monolithic column format is a good alternative to typical spherical particle packed columns for capillary liquid chromatography of biomacromolecules. Several novel anion-exchange polymer monoliths for the analysis of proteins were synthesized for improved biocompatibility. Two novel polymeric monoliths were prepared in a single step by …

Volume 46, Number 51: August 12, 2009, University Of North Dakota

University Letter Archive

No abstract provided.

Functional Near-Infrared Spectroscopy For Hb And Hbo₂ Detection Using Remote Sensing, Rane M. Pierson

Theses and Dissertations

The goal of the work presented in this thesis is to develop a wireless, near-infrared (NIR) imaging system to provide flexibility and functionality to clinicians and researchers who require monitoring of blood profusion to tissue, muscles, or the brain. The prototype device uses a single stimulus/detection unit composed of an Epitex NIR LED with three wavelength options: 730, 805, and 850 nm, and an OPT101 photodiode detector. The device can be used to detect changes in the levels of oxygenated and deoxygenated hemoglobin in the body by measuring the amounts of absorbed and backscattered light at the wavelength associated with …

Manipulating Testosterone To Assess Links Between Behavior, Morphology, And Performance In The Brown Anole Anolis Sagrei, Robert M. Cox, Derek S. Stenquist, Justin P. Henningsen, Ryan Calsbeek

Dartmouth Scholarship

Survival and reproductive success are determined by the complex interplay between behavior, physiology, morphology, and performance. When optimal trait combinations along these various phenotypic axes differ between sexes or across seasons, regulatory mechanisms such as sex steroids can often facilitate sex‐specific and/or seasonal trait expression. In this study, we used surgical castration and replacement of exogenous testosterone in adult male brown anoles (Anolis sagrei) to simultaneously examine the effects of testosterone on a suite of morphological (dewlap area, body size), physiological (immune function), behavioral (dewlap, head bob, and push‐up displays), and performance (stamina, sprint speed, bite force) traits. …

An Examination Of Scent-Marking, Individual Odors, And Individual Discrimination In The Raccoon (Procyon Lotor)., Laura Alice Kent

Theses

This study had three objectives: 1) to characterize the patterns of scent-marking in captive raccoons; 2) to determine if wild-trapped raccoons can discriminate individual differences in the odors of urine, feces or anal sac secretions; 3) to analyze the variation in chemical composition of urine samples among individuals. I observed five raccoons living in a semi-natural enclosure at the Henry Doorly Zoo in Omaha, Nebraska and recorded all behaviors related to scent-marking. For the studies on individual differences and discrimination through odors, I used the familiarization-discrimination technique with raccoons housed in conditions that approximated their natural environment. In the chemical …

2009 Fall Convocation Program, Office Of Communications & Marketing, Morehead State University.

Communications and Marketing Publications Archive

Fall convocation program held on August 12, 2009.

Electrochromic Thermal Manager For Mini, Micro And Nano Satellites, Hulya Demiryont, Kenneth Shannon Iii, Elwood Agasid

Small Satellite Conference

The thermal environments of satellites, in general, and futuristic mini, micro, nano and pico satellites, in particular, are in a constant state of flux. Each satellite houses valuable equipment having specified temperature limits and a range of heat generation rates. In order to maintain all equipment within operational temperature in this continuously temperature changing environment, an active thermal control system is required. Weight, size and energy requirements of the thermal controller of a satellite are a major challenge especially in light of the trend toward diminishing satellite size. In this paper, we present an active thermal manager capable of controlling …

Initial Flight Results From The Pharmasat Biological Microsatellite Mission, Christopher Kitts, Karolyn Ronzano, Richard Rasay, Ignacio Mas, Jose Acain, Michael Neumann, Laura Bica, Paul Mahacek, Giovanni Minelli, Erin Beck, Steve Li, Brian Gamp, Seamus Agnew, John Shepard, John Hines, Elwood Agasid, Charlie Friedericks, Matthew Piccini, Macarena Parra, Linda Timucin, C. Beasley, Mike Henschke, Ed Luzzi, Nghia Mai, Mike Mcintyre, Robert Ricks, Antonio Ricco, David Squires, Greg Yost, Defouw, Aaron Schooley, Diana Ly, Millan Diaz-Aguado, Eric Stackpole, Orlando Diaz, Tammy Doukas

Small Satellite Conference

The mission of the PharmaSat biological microsatellite is to investigate the efficacy of anti-fungal agents in the spaceflight environment. The satellite uses autonomous, in situ bio-analytical and sample management technologies in order to culture and characterize the growth of multiple samples of yeast, which are exposed to differing levels of an anti-fungal agent during their growth cycle. The satellite uses a 10 cm x 10 cm x 30 cm Cubesat-class structure with body-mounted solar panels, an ISM-band transceiver, and a simple PIC-class microcontroller for the main flight computer. PharmaSat was launched on May 19 , 2009 from Wallops Flight Facility …

Stein (Suprathermal Electrons, Ions And Neutrals), A New Particle Detection Instrument For Space Weather Research With Cubesats, D.L. Glaser, J.S. Halekas, P. Turin, D.W. Curtis, D.E. Larson, S.E. Mcbride, R.P. Lin

Small Satellite Conference

The Space Sciences Laboratory at UC Berkeley is proposing a 3U CubeSat mission, the CubeSat for Ions, Neutrals, Electrons, and MAgnetic fields (CINEMA), to be funded by the NSF Space Weather CubeSat program and Kyung Hee University, S. Korea. CINEMA will have a particle detector called STEIN (SupraThermal Electrons, Ions, and Neutrals), part of a new breed of highly capable, low mass, and low power consumption silicon semiconductor detectors (SSDs). STEIN will measure particles in the ~2-100 keV range and distinguish between electrons, ions and neutrals up to ~20 keV. It will perform fundamental research on magnetic storms and the …

2009 Symposium Schedule And Sponsors, University Of Nevada Las Vegas

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.

2009 Symposium Schedule, University Of Nevada Las Vegas

UNLV Renewable Energy Symposium

The 3rd Annual Renewable Energy Symposium took place on the UNLV campus August 11 & 12. The event focused on renewable energy production in Nevada, the US Southwest, and renewable research projects nationwide. The event was a great success with over 200 individuals in attendance.

Binding Of Pseudomonas Aeruginosa Apobacterioferritin-Associated Ferredoxin To Bacterioferritin B Promotes Heme Mediation Of Electron Delivery And Mobilization Of Core Mineral Iron, Saroja K. Weeratunga, Casey E. Gee, Scott Lovell, Yuhong Zeng, Carrie L. Woodin, Mario Rivera

Faculty Publications

The bfrB gene from Pseudomonas aeruginosa was cloned and expressed in Escherichia coli. The resultant protein (BfrB), which assembles into a 445.3 kDa complex from 24 identical subunits, binds 12 molecules of heme axially coordinated by two Met residues. BfrB, isolated with 5-10 iron atoms per protein molecule, was reconstituted with ferrous ions to prepare samples with a core mineral containing 600 ± 40 ferric ions per BfrB molecule and approximately one phosphate molecule per iron atom. In the presence of sodium dithionite or in the presence of P. aeruginosa ferredoxin NADP reductase (FPR) and NADPH, the heme in BfrB …

Real-Time Virus Analysis Via Image Charge Detection Surface Induced Dissociation Tandem Mass Spectrometry, Seth T. Call

Theses and Dissertations

This thesis reports on the development of a novel mass spectrometer combining image charge detection with surface induced dissociation for real-time analysis of intact viruses. Protonated viruses produced using electrospray are accelerated and subsequently impact on a solid surface. Capsid peptides released during the impact are analyzed using time-of-flight mass spectrometry. Image charge detection is used to measure the mass and charge states of structurally intact, electrosprayed viruses prior to impact. Since virus capsids are composed of loosely-bound proteins, collision of viruses with surfaces at moderate impact energies could release intact proteins. The masses and numbers of different protein types …

Biofuels: Cultivating Energy, Not Invasive Species, Invasive Species Advisory Committee

National Invasive Species Council

Biofuels: Cultivating Energy, not Invasive Species, approved by ISAC on August 11, 2009

ISSUE

To provide alternatives to petroleum-based energy, the United States government has mandated a greater proportion of plant-based biofuels be integrated into its energy portfolio. However, certain plant species being proposed for biofuel production in the United States are invasive species or are likely to escape cultivation and become invasive. United States Executive Order (EO) 131121 defines invasive species as “alien [non-native] species whose introduction does or is likely to cause economic or environmental harm or harm to human health” and states: “Each Federal agency whose actions …

Inflammation And Infection Do Not Promote Arterial Aging And Cardiovascular Disease Risk Factors Among Lean Horticulturalists, Michael Gurven, Hillard Kaplan, Jeffrey Winking, Daniel Eid Rodriguez, Sarinnapha Vasunilashorn, Jung Ki Kim, Caleb Finch, Eileen M. Crimmins

ESI Publications

Background: Arterial aging is well characterized in industrial populations, but scantly described in populations with little access to modern medicine. Here we characterize health and aging among the Tsimane, Amazonian forager-horticulturalists with short life expectancy, high infectious loads and inflammation, but low adiposity and robust physical fitness. Inflammation has been implicated in all stages of arterial aging, atherogenesis and hypertension, and so we test whether greater inflammation associates with atherosclerosis and CVD risk. In contrast, moderate to vigorous daily activity, minimal obesity, and low fat intake predict minimal CVD risk among older Tsimane.

Methods and Findings: Peripheral arterial …

Incorporating A Test Flight Into The Standard Development Cycle , Steve Wichman, Mike Pratt, Spencer Winters

Small Satellite Conference

What could be called a Catch-22, or at least a thorny obstacle, exists in the standard development cycle. A component does not get into space until it’s proven, and it’s not proven until it gets into space. Of course, this is not absolute, but a gray area nevertheless exists in this aspect of the development cycle. This paper proposes the insertion of a test flight into the standard development cycle and, in the process, will detail the logistics, options, and costs associated with such a proposal. Finally, it will outline the ways in which customers—those purchasing new technologies—can use the …