Determining Thermal Capabilities for External Transfer Operations on the International Space Station

External transfers on the International Space Station (ISS) have a degree of difficulty caused by the severity of the radiative thermal environment and the complexity of the operational choreography to perform the installation and activation of the hardware. These transfers can be performed robotically, by astronauts during an Extra Vehicular Activity (EVA - spacewalk), or combination of robotic/crew operations. Robotic transfers may include capability to intermittently power the hardware; while the hardware remains unpowered for EVA operations. Robotic transfers can be staged to occur in a favorable thermal environment, though typically take longer than a transfer by crew during an EVA where the hardware may not be robotically compatible. The hardware is under passive thermal control, use of optics/multi-layer insulation/heaters, while being transferred from/to a visiting vehicle, airlock, stowage platform, or external ISS structure and may include additional design components, such as removable protective blankets, to meet the transfer requirements. Thermal analysis must be performed to determine the capability of the hardware being transferred to provide the Mission Control team the products necessary to plan and execute the operation while establishing an awareness for any contingency response. An overview of the thermal aspects in planning these types of transfer operations, the analytical approaches and assumptions, and examples of results are provided in this paper

Tabooed Terrain: Reflections On Conducting Adult Education Research In Lesbian/Gay/Queer Arenas

Introduction: The issues to be explored in this symposium are the multiple ways that same-sex orientation is negotiated and mediated in Adult Education research. The sociology of learning and other diverse bodies of literature (e.g. gay/queer theory) show that, in the main, same-sex orientation (matter related to Lesbians, Gay men, Transgendered, Bisexuals and Transsexuals) is treated as tabooed terrain in both the academy and society (Hill, 1995), often with grave results. In this symposium, panelist Andre Grace positions his early developmental denial of queer being and acting as a form of self-mutilation. Andre has taken up a self-directed project of autobiographical writing and theorizing as a means to subvert society’s forbidden parameters. Since many educators and community members fall back on stereotypes, internalized homophobia and homoprejudice that flagrantly compromise the very principles for which they labor (Harbeck, 1997), Andre has learned to name and express his outlawed self

Data Acquisition and Control Program for Chromatographic and Spectroscopic Studies

An IBMPC compatible computer was interfaced to an Ithaco 3962 lock-in-amplifier. The computer controlled the functions of the lock-in-amplifier, acquired and stored data, and allowed for real time or off-line processing of data. Computer/amplifier connection was made via RS-232-C serial interface. Programmed in Microsoft Quick BASIC, the computer assumed the role of a dedicated chromatographic integrator. This reduced the overall instrumentation expense by eliminating a dedicated chromatographic integrator. The computer program supplied much greater flexibility in control and data interpretation. To show its utility, the program was applied to a study of the infrared emission from a flame upon the introduction of hydrogen or carbon species, respectively, in the gaseous form and as contained in organic compounds. Emission was monitored at 2.7 and 4.3 /μm by an infrared radiometer

The Design and Testing of the LSSIF Advanced Thermal Control System

The Life Support Systems Integration Facility (LSSIF) provides a platform to design and evaluate advanced manned space systems at NASA Johnson Space Center (JSC). The LSSIF Early Human Testing Initiative requires the integration of such subsystems to enable human occupancy of the 6 meter chamber for a 90 day closed volume test. The Advanced Thermal Control System (TCS) is an important component of the integrated system by supplying coolant to the subsystems within the chamber, such as the Air Revitalization System. The TCS incorporates an advanced high efficiency, heat pump to reject waste heat from the chamber to an external sink or 'lift' temperature that emulates a Lunar environment. The heat pump is the High Lift Heat Pump, developed by Foster-Miller, Inc., and is the main test article of the TCS. The heat pump prototype utilizes a non-CFC refrigerant in a design where the thermal requirements exceed existing terrestrial technology. These operating requirements provide a unique opportunity to design and test an advanced integrated thermal system and the associated controls. The design, control, and systems integration of the heat pump and the TCS also have terrestrial technology application. This paper addresses the design of the TCS and the heat pump, along with the control scheme to fully test the heat pump. Design approaches utilized in the LSSIF TCS are promoted for implementation in terrestrial thermal systems. The results of the preliminary thermal and fluid analyses used to develop the control of the thermal systems will also be discussed. The paper includes objectives for the 90 day human test and the test setup. Finally, conclusions will be drawn and recommendations for Earth design application are submitted

Faculty Recital: Tyrone Jackson Trio featuring Alex Lattimore, vocals

KSU School of Music presents Tyrone Jackson Trio featuring Alex Lattimore, vocals.https://digitalcommons.kennesaw.edu/musicprograms/1099/thumbnail.jp

A statistical analysis of an ionic air moving device for the optimization of geometry

Ionic air moving devices are similar to fans and blowers but move ionized air molecules between electrodes with a high electric field. Steady air flow is generated from the transfer of momentum when charged molecules collide with uncharged molecules. Ionic air moving devices are seen as less efficient as fans and blowers. The optimization of the device’s geometry can increase its output efficiency. In optimizing the geometry of an ionic air moving device the literature suggests that varying the parameters of the number of ionization sites, the distance between the ionization sites and the collector, the height of the collector, and the voltage influences the air flow of the device [1-5]. In the current study, an analysis of the parameters though the use of design of experiments statistically showed which factors significantly influences the air flow. The ionic air moving devices parameters were statistically evaluated with the use of Minitab®. The distance between the electrodes, and the voltage were shown to be significant and to have the most effect on the ionic device in terms of air flow

Excited state properties of 1-naphthol and its sulphonates

The transient absorption spectrum of 1-naphthol was first sought by flash photolysis at higher acidities than had been previously investigated. While no transient absorption was observed for l-naphthol itself, strong transient absorptions were observed for l-naphthol-2 and -4-sulphonates even in aqueous solution. This enabled pK(T₁) for the protonation of the naphtholate ions to be measured directly from the strength of triplet-triplet absorptions and this value was compared with the pK(T₁) obtained from Forster Cycle calculations on phosphorescence maxima,. Values of pK(S₁) and pK(S₀) were also obtained and the order of the pK values was found to be pK(S₀) > pK(T₁) >> pK(S₁), It is likely that this order is the same for l-naphthol and therefore disagrees with the results of some recent quantum mechanical calculations, A strong fluorescence was also observed for l-naphthol-2- sulphonate in aqueous acidic solutions, in contrast with the weak fluorescence observed for 1-naphthol and l-naphthol-4-sulphonate. This is explained in terms of intramolecular hydrogen bonding in l-naphthol-2-sulphonate which prevents quenching of the first excited singlet state by hydrogen bonding with solvent water molecules. The fluorescence intensity of 1-naphthol, l-naphthol-2-sulphonate, and l~naphthol-4-sulphonate in aqueous acidic solutions is also found to increase as the water concentration is effectively reduced by the addition of certain solutes in large quantities, A corresponding increase in the triplet yield is also found for l-naphthol-2-sulphonate in acidic solutions. These increases are also explained in terms of reducing the hydrogen bonding to solvent water molecules and hence reducing the deactivation of the state, l-Naphthol sulphonates and protonates in concentrated sulphuric acid and it is deduced that protonation occurs at a carbon atom in the naphthalene ring, A value of pK(S₀ ) was determined for this protonation

DegP related proteases in Escherichia coli and carboxyl-terminal tagging of proteins for degradation

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1996.Includes bibliographical references.by Patrick Robert Henson Waller.Ph.D

Becoming a pianist: an fMRI study of musical literacy acquisition

Musically naive divisions were scanned using functional magnetic resonance imaging (fMRI) before and after they had been taught to read music and play keyboard. When divisions played melodies from musical notation after training, activation was seen in a cluster of voxels within the right superior parietal cortex consistent with the view that music reading involves spatial sensorimotor mapping