Onsite analysis of data from the Dynamics Explorer (DE) spacecraft

The tasks performed by ARC Professional Services Group, Inc. fell into five parts: (1) dynamics explorer (DE) data analysis and modeling; (2) DE project support; (3) chemical release observations support; (4) VLF emissions and plasma instability studies; and (5) modeling of planetary radio emissions. Some recommendations for future considerations are also addressed

Use of Sonification for Analysis and Detection of Plasma Bubbles at 21 MHz

This research explores sonification as a useful tool for space science data exploration. Our interest lies in basic scientific analysis of plasmas of the ionosphere, of interplanetary space and of the interstellar medium. These plasmas all contain irregularities. Propagation of electromagnetic waves, like optical or radio waves, through a medium with random fluctuations in refractive index results in amplitude and phase fluctuations (Scheuer 1968). These variations may be displayed via sonification, using changes in sounds to represent the data variations. This is particularly useful extending science to the visually-impaired. The xSonify Java-based tool was developed to explore sonification techniques and its value for general science analysis and also assistive technology

Generating Animated Displays of Spacecraft Orbits

Tool for Interactive Plotting, Sonification, and 3D Orbit Display (TIPSOD) is a computer program for generating interactive, animated, four-dimensional (space and time) displays of spacecraft orbits. TIPSOD utilizes the programming interface of the Satellite Situation Center Web (SSCWeb) services to communicate with the SSC logic and database by use of the open protocols of the Internet. TIPSOD is implemented in Java 3D and effects an extension of the preexisting SSCWeb two-dimensional static graphical displays of orbits. Orbits can be displayed in any or all of the following seven reference systems: true-of-date (an inertial system), J2000 (another inertial system), geographic, geomagnetic, geocentric solar ecliptic, geocentric solar magnetospheric, and solar magnetic. In addition to orbits, TIPSOD computes and displays Sibeck's magnetopause and Fairfield's bow-shock surfaces. TIPSOD can be used by the scientific community as a means of projection or interpretation. It also has potential as an educational tool

Quantum modeling of semiconductor gain materials and vertical-external-cavity surface-emitting laser systems

This article gives an,overview of the microscopic theory,theory used to quantitatively model a wide range of semiconductor laser gain materials. As a snapshot of the current state of research, applications to a variety of actual quantum-well systems are presented. Detailed theory experiment comparisons are shown and it is analyze how the theory can be used to extract poorly known material parameters. The intrinsic laser loss processes due to radiative and nonradiative Auger recombination are evaluated microscopically. The results are used for realistic simulations of vertical-external-cavity surface-emitting laser systems. To account for nonequilibrium effects, a simplified model is presented using pre-computed microscopic scattering and dephasing rates. Prominent deviations from quasi-equilibrium carrier distributions are obtained under strong in-well pumping conditions

The Space Physics Environment Data Analysis System (SPEDAS)

With the advent of the Heliophysics/Geospace System Observatory (H/GSO), a complement of multi-spacecraft missions and ground-based observatories to study the space environment, data retrieval, analysis, and visualization of space physics data can be daunting. The Space Physics Environment Data Analysis System (SPEDAS), a grass-roots software development platform (www.spedas.org), is now officially supported by NASA Heliophysics as part of its data environment infrastructure. It serves more than a dozen space missions and ground observatories and can integrate the full complement of past and upcoming space physics missions with minimal resources, following clear, simple, and well-proven guidelines. Free, modular and configurable to the needs of individual missions, it works in both command-line (ideal for experienced users) and Graphical User Interface (GUI) mode (reducing the learning curve for first-time users). Both options have “crib-sheets,” user-command sequences in ASCII format that can facilitate record-and-repeat actions, especially for complex operations and plotting. Crib-sheets enhance scientific interactions, as users can move rapidly and accurately from exchanges of technical information on data processing to efficient discussions regarding data interpretation and science. SPEDAS can readily query and ingest all International Solar Terrestrial Physics (ISTP)-compatible products from the Space Physics Data Facility (SPDF), enabling access to a vast collection of historic and current mission data. The planned incorporation of Heliophysics Application Programmer’s Interface (HAPI) standards will facilitate data ingestion from distributed datasets that adhere to these standards. Although SPEDAS is currently Interactive Data Language (IDL)-based (and interfaces to Java-based tools such as Autoplot), efforts are under-way to expand it further to work with python (first as an interface tool and potentially even receiving an under-the-hood replacement). We review the SPEDAS development history, goals, and current implementation. We explain its “modes of use” with examples geared for users and outline its technical implementation and requirements with software developers in mind. We also describe SPEDAS personnel and software management, interfaces with other organizations, resources and support structure available to the community, and future development plans

Mirror Ritual: A Ballet in Three Tableaus

Mirror Ritual is a seventeen-minute chamber ballet in three tableaus with choreography by University of Michigan Professor Jillian Hopper. The work, scored for a thirteen-piece chamber ensemble (flute, clarinet, bassoon, piano, and 2.2.2.2.1 strings,) premiered in February 2023 in the Power Center for the Performing Arts as part of the University of Michigan Department of Dance’s annual showcase, titled Sleek Disturbances. Mirror Ritual was choreographed with an ensemble of sixteen graduate and undergraduate dancers. The conceptual framework of Mirror Ritual sits at the intersection of multiple streams of compositional and musicological inquiry, combining my long-standing interest in theatrical composition and recent research into perceptions of “American-ness” in music and culture. The primary nexus for this co-inquiry was Aaron Copland’s 1944 composition, Appalachian Spring, written in collaboration with choreographer Martha Graham. Appalachian Spring bore the weight, in many ways, of a post-WWII search for an nationalistic identity by the United States; the resulting work largely centered and idealized rural whiteness and sanitized the rugged individualism and extractive process central to the country’s ideas of Manifest Destiny. Mirror Ritual stands as a response to Appalachian Spring—not to refute Copland and Graham, but to ask the same questions of current artists and discern how our answers align with or vary from those in 1944. The more that Jillian and abstracted these questions to examine the entire tapestry, the more we became transfixed by singular threads. Our approach tells a small story—one of personal migration, of alienation, and of found family. Derived from our experiences and the experiences of our cast, we relied heavily on asking questions rather than answering them: what is our relationship to place? What do we take with us from the places we’re from? How is our identity constructed in relation to—or in opposition to—place? In this, we sought to leave interpretive space to allow audiences to insert themselves, and thereby see themselves, in the work. This work also reckons with the concepts around an “American” sound in music. The trademarks of Copland’s compositions (sparse harmony, pandiatonicism, folk song quotes,) are, to many, synonymous with “American-ness” in Western classical music. While I do not subscribe to the idea that a Coplandic musical language encompasses the American experience (and its breadth of diasporic histories and experiences,) it felt prudent to approach this idea of American-ness through its most essentialized form; this allowed me to live inside of expectations of an “American” sound while examining them (and subverting them.) The resultant musical language allowed for a personal and audible deconstruction of the sonic tropes surrounding “American-ness” while also achieving the interpretive openness we hoped for.AMUMusic: CompositionUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/178002/1/gcandey_1.pd

Women's understandings of their relationship with their husband in the early stages of his gradual onset dementia

SIGLEAvailable from British Library Document Supply Centre- DSC:DXN054561 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Common Data Format (CDF) and Coordinated Data Analysis Web (CDAWeb)

The Coordinated Data Analysis Web (CDAWeb) <http://cdaweb.gsfc.nasa.gov> data browsing system provides plotting, listing and open access v ia FTP, HTTP, and web services (REST, SOAP, OPeNDAP) for data from mo st NASA Heliophysics missions and is heavily used by the community. C ombining data from many instruments and missions enables broad resear ch analysis and correlation and coordination with other experiments a nd missions. Crucial to its effectiveness is the use of a standard se lf-describing data format, in this case, the Common Data Format (CDF) <http://cdf.gsfc.nasa.gov>, also developed at the Space Physics Data facility <http://spdf.gsfc.nasa.gov> , and the use of metadata standa rds (easily edited with SKTeditor <http://sscweb.gsfc.nasa.gov/skteditor/>). CDAweb is based on a set of IDL routines, CDAWlib <http://spd f.gsfc.nasa.gov/CDAWlib.html>. . The CDF project also maintains soft ware and services for translating between many standard formats (CDF. netCDF, HDF, FITS, XML) <!<http://cdf.gsfc.nasa.gov/html/dtws.html>