Peak polarity selector Patent

Peak polarity selector for monitoring waveform

New Calculations of Recombination Rates for Cold 4^4He Atoms and Determination of Universal Scaling Functions

Three-body recombination rates for cold $^4$He are calculated with a new method which exploits the simple relationship between the imaginary part of the atom-dimer elastic scattering phase shift and the $S$-matrix for recombination. The elastic phase shifts are computed above breakup threshold by solving a three-body Faddeev equation in momentum space with inputs based on a variety of modern atom-atom potentials. Recombination coefficients for the HFD-B3-FCII potential agree very well with the only previously published results. Since the elastic scattering and recombination processes for $^4$He are governed by "Efimov physics", they depend on universal functions of a scaling variable. The newly computed recombination coefficients for potentials other than HFD-B3-FCII make it possible to determine these universal functions for the first time.Comment: 15 pages, 5 figure

MR405: Response of Young Black Spruce (Picea mariana (Mill.) B.S.P.) to a Mixture of Wood Ash and Secondary Papermill Sludge

A study to examine the effects of a combination of wood ash and secondary papermill sludge applied to a clearcut planted to black spruce was initiated in 1987 with the cooperation of Great Northern Paper. Objectives of the study were to assess the effects of the residuals on (1) seedling growth, (2) seedling foliar element concentrations, and (3) chemical properties of the forest floor and mineral soil. This report emphasizes growth results for 1991 through 1995 and foliar element results through 1994.https://digitalcommons.library.umaine.edu/aes_miscreports/1023/thumbnail.jp

Detection of Water and/or Hydroxyl on Asteroid (16) Psyche

In order to search for evidence of hydration on M-type asteroid (16) Psyche, we observed this object in the 3 micron spectral region using the long-wavelength cross-dispersed (LXD: 1.9-4.2 micron) mode of the SpeX spectrograph/imager at the NASA Infrared Telescope Facility (IRTF). Our observations show that Psyche exhibits a 3 micron absorption feature, attributed to water or hydroxyl. The 3 micron absorption feature is consistent with the hydration features found on the surfaces of water-rich asteroids, attributed to OH- and/or H2O-bearing phases (phyllosilicates). The detection of a 3 micron hydration absorption band on Psyche suggests that this asteroid may not be metallic core, or it could be a metallic core that has been impacted by carbonaceous material over the past 4.5 Gyr. Our results also indicate rotational spectral variations, which we suggest reflect heterogeneity in the metal/silicate ratio on the surface of Psyche.Comment: 13 pages, 9 figures in Astronomical Journal, 201

Application of Hapke photometric model to three geologic surfaces using PARABOLA bidirectional reflection data

The Geologic Remote Sensing Field Experiment (GRSFE) was conducted in July and September of 1989 to collect data with both ground and airborne instrumentation. A major objective of GRSFE was to collect data which could be used to test radiative transfer models for the extraction of composition and textural surface properties from remotely acquired data. Reported here are the initial results from an application of the Hapke photometric model, using data from the Portable Apparatus for Remote Acquisition of Bidirectional Observations of Land and Atmosphere (PARABOLA), a ground based radiometer with three spectral channels. PARABOLA data was collected in the Lunar Crater Volcanic Field in Nevada, specifically from the region of Lunar Lake, a playa. The Hapke model was found to be inadequate for three relatively common geologic surfaces (a clay-rich, hard packed surface with decimeter sized mudcracks; a cobble site, similar to a playa site, but strewn with basaltic cobbles and pebbles; and a surface mantled basalt lava flow). The model is not at fault; rather, the complexity of most geologic surfaces is not accounted for in the initial assumptions

Interview with Robert Shepard, Anne Shepard, Randy Whittington, 2016-11-09 - 01

https://scholarworks.utrgv.edu/somhi/1018/thumbnail.jp

Interview with Robert Shepard, Anne Shepard, Randy Whittington, 2016-11-04 - 01

Eileen Mattei\u27s work was funded by South Texas Medical Foundation.https://scholarworks.utrgv.edu/somhi/1017/thumbnail.jp

Interview with Robert Shepard, Anne Shepard, Randy Whittington, 2016-11-09 - 02

https://scholarworks.utrgv.edu/somhi/1046/thumbnail.jp

Assessment of fish populations and habitat on Oculina Bank, a deep-sea coral marine protected area off eastern Florida

A portion of the Oculina Bank located off eastern Florida is a marine protected area (MPA) preserved for its dense populations of the ivory tree coral (Oculina varicosa), which provides important habitat for fish. Surveys of fish assemblages and benthic habitat were conducted inside and outside the MPA in 2003 and 2005 by using remotely operated vehicle video transects and digital still imagery. Fish species composition, biodiversity, and grouper densities were used to determine whether O. varicosa forms an essential habitat compared to other structure-forming habitats and to examine the effectiveness of the MPA. Multivariate analyses indicated no differences in fish assemblages or biodiversity among hardbottom habitat types and grouper densities were highest among the most complex habitats; however the higher densities were not exclusive to coral habitat. Therefore, we conclude that O. varicosa was functionally equivalent to other hardbottom habitats. Even though fish assemblages were not different among management areas, biodiversity and grouper densities were higher inside the MPA compared to outside. The percentage of intact coral was also higher inside the MPA. These results provide initial evidence demonstrating effectiveness of the MPA for restoring reef fish and their habitat. This is the first study to compare reef fish populations on O. varicosa with other structure-forming reef habitats and also the first to examine the effectiveness of the MPA for restoring fish populations and live reef cover

Interview with Robert Shepard, Anne Shepard, Randy Whittington, 2016-11-04 - 02

Eileen Mattei\u27s work was funded by South Texas Medical Foundation.https://scholarworks.utrgv.edu/somhi/1045/thumbnail.jp