A review and evaluation of the Langley Research Center's Scientific and Technical Information Program. Results of phase 4: Knowledge and attitudes survey, academic and industrial personnel

Feedback from engineers and scientists in the academic and industrial community provided an assessment of the usage and perceived quality of NASA Langley generated STI and the familiarity and usage of selected NASA publications and services and identified ways to increase the accessibility of Langley STI. The questionnaire utilized both open and closed ended questions and was pretested for finalization. The questions were organized around the seven objectives for Phase IV. From a contact list of nearly 1,200 active industrial and academic researchers, approximately 600 addresses were verified. The 497 persons who agreed to participate were mailed questionnaires. The 381 completed questionnaires received by the cutoff date were analyzed. Based on the survey findings, recommendations were made for increasing the familiarity with and use of NASA and Langley STI and selected NASA publications and services. In addition, recommendations were made for increasing the accessibility of Langley STI

Faint Field Galaxies Around Bright Stars - A New Strategy for Imaging at the Diffraction Limit

This paper presents a new strategy for observing faint galaxies with high order natural guide star systems. We have imaged 5 high galactic latitude fields within the isoplanatic patch of bright stars (8.5 < R < 10.3 mag). The fields provide a rich set of faint field galaxies that are observable with a natural guide star adaptive optics system on a large telescope. Due to the small fields of many AO science cameras, these preliminary images are necessary to identify candidate galaxies. We present the photometry and positions for 78 objects (at least 40 galaxies) near five bright stars, appropriate for diffraction limited studies with the Keck and other AO systems on large ground-based telescopes. The K band seeing conditions in each field were excellent (0.4" - 0.7") allowing us to identify stars and estimate galaxy sizes. We also simulate AO images of field galaxies to determine the feasibility of infrared morphological studies at the diffraction limit. With new high order AO systems coming on line with 8-10 meter class telescopes, we believe these observations are invaluable in beginning to study faint galaxy populations at the diffraction limit.Comment: 15 pages, Latex, 9 figures. Accepted for publication in P.A.S.

Future directions in aeropropulsion technology

Future directions in aeropropulsion technology that have been identified in a series of studies recently sponsored by the U.S. Government are discussed. Advanced vehicle concepts that could become possible by the turn of the century are presented along with some of their projected capabilities. Key building-block propulsion technologies that will contribute to making these vehicle concepts a reality are discussed along with projections of their status by the year 2000. Some pertinent highlights of the NASA aeropropulsion program are included in the discussion

Turbomachinery technology for high-speed civil flight

NASA Lewis' research and technology efforts applicable to turbomachinery for high-speed flight are discussed. The potential benefits and cycle requirements for advanced variable cycle engines and the supersonic throughflow fan engine for a high-speed civil transport application are presented. The supersonic throughflow fan technology program is discussed. Technology efforts in the basic discipline areas addressing the severe operating conditions associated with high-speed flight turbomachinery are reviewed. Included are examples of work in internal fluid mechanics, high-temperature materials, structural analysis, instrumentation and controls

A review and evaluation of the Langley Research Center's scientific and technical information program. Results of phase 1: Knowledge and attitudes survey, LaRC research personnel

The effectiveness of the Langley STI program was assessed using feedback obtained from Langley engineers and scientists. A survey research procedure was conducted in two stages. Personal interviews with 64 randomly selected Langley engineers and scientists were used to obtain information for questionnaire development. Data were then collected by means of the questionnaire which covered various aspects of the Langley STI program, utilized both open and closed ended questions and was pretested for finalization. The questions were organized around the six objectives for Phase 1. The completed questionnaires were analyzed. From the analysis of the data, recommendations were made for improving the Langley STI program

Morphological Evolution of Distant Galaxies from Adaptive Optics Imaging

We report here on a sample of resolved, infrared images of galaxies at z~0.5 taken with the 10-m Keck Telescope's Adaptive Optics (AO) system. We regularly achieve a spatial resolution of 0.05'' and are thus able to resolve both the disk and bulge components. We have extracted morphological information for ten galaxies and compared their properties to those of a local sample. The selection effects of both samples were explicitly taken into account in order to derive the unbiased result that disks at z~0.5 are ~0.6 mag arcsec^-2 brighter than, and about the same size as, local disks. The no-luminosity-evolution case is ruled out at 90% confidence. We also find, in a more qualitative analysis, that the bulges of these galaxies have undergone a smaller amount of surface brightness evolution and have also not changed significantly in size from z~0.5 to today. This is the first time this type of morphological evolution has been measured in the infrared and it points to the unique power of AO in exploring galaxy evolution.Comment: 27 pages, 7figures, 2 tables. Accepted for publication in the Astrophysical Journa

Comparison of Patient Satisfaction with Telehealth and In-Clinic Post-Operative Visits

Introduction: Telehealth has grown rapidly in the healthcare industry as a time efficient, affordable, and accessible means to provide care. Jefferson’s Department of Urology currently employs telehealth for post-operative visits but its efficacy in post-nephrectomy patients has not been well studied. We aim to demonstrate that patient satisfaction is the same for telehealth versus in-clinic post-operative visits in nephrectomy patients. Secondarily we will examine distance saved for telehealth patients. Methods: We will administer an IRB approved questionnaire to all nephrectomy patients via the EPIC® EMR platform after their post-operative visit. Each questionnaire will be specific to telehealth or in-clinic and asks the patients to rate their experiences on a 5-point Likert scale. The study time frame is from May 2019-November 2022. Time and distance data for secondary outcomes was extrapolated from the EPIC® EMR. Results: Thus far there have been 35 in-clinic and 9 telehealth post-operative appointments. Patient satisfaction data will be collected in the future. Each telehealth patient saved a mean of 19 miles (6.9-32.5 miles) while each in-clinic patient traveled a mean of 30 miles (0.8-60.9 miles). Discussion: Delays of the project have left us unable to determine patient satisfaction at present. Future establishment of equal satisfaction may lead to increased provider utilization of telehealth. Our secondary outcomes are positive, reporting that telehealth patients saved both time and travel distance on their appointments. If the questionnaire ultimately reveals satisfaction with telehealth, the combination with travel distance saved leads telehealth in a forward-looking direction

Comparison of Patient Satisfaction between Telehealth and In-Clinic Post-Operative Visits

Introduction: Telehealth has the potential to be an efficient, affordable, and accessible means to give care. In the field of Urology, its use has large potential but has not been well studied. We hypothesize that the use of telehealth for post-op nephrectomy patients will maintain the same level of patient satisfaction. We also hypothesize that telehealth visits will take less time and save patients money by eliminating the need to travel. Methods: From May through July 2019, post-nephrectomy patients who consented to the study were given either a telehealth or in-clinic post-operative visit. Outcome metrics and demographics information were obtained through the Epic® EMR Platform. Results: There were a total of 6 telehealth patients and 15 in-clinic patients in the time frame. Due to issues with the Epic® survey system, the satisfaction data cannot be presented at this time. The telehealth patient saved a mean of 19 miles of travel (range 6.9-32.5 miles). The in-clinic patient traveled a mean of 30.4 miles (range 0.8-60.9). Discussion: Due to insufficient data, it is difficult to make any reliable comparisons. Telehealth visits provide some benefit for patients by eliminating the need to travel. With more data, we expect the telehealth patients to be equally satisfied with their visits compared to in-clinic patients. We also expect telehealth visits to take significantly less time for the patients compared to in-clinic visits. This is an ongoing study, and we hope our data will be more robust in the future

Exploring the Structure of Distant Galaxies with Adaptive Optics on the Keck-II Telescope

We report on the first observation of cosmologically distant field galaxies with an high order Adaptive Optics (AO) system on an 8-10 meter class telescope. Two galaxies were observed at 1.6 microns at an angular resolution as high as 50 milliarcsec using the AO system on the Keck-II telescope. Radial profiles of both objects are consistent with those of local spiral galaxies and are decomposed into a classic exponential disk and a central bulge. A star-forming cluster or companion galaxy as well as a compact core are detected in one of the galaxies at a redshift of 0.37+/-0.05. We discuss possible explanations for the core including a small bulge, a nuclear starburst, or an active nucleus. The same galaxy shows a peak disk surface brightness that is brighter than local disks of comparable size. These observations demonstrate the power of AO to reveal details of the morphology of distant faint galaxies and to explore galaxy evolution.Comment: 5 pages, Latex, 3 figures. Accepted for publication in P.A.S.