Drought Tolerance, A Database of Irrigation Requirements for Woody Plants of Northern Utah

This publication includes a database of irrigation requirements for woody plants in Northern Utah

The use of VER in establishing a prognosis for the treatment of amblyopia

VERs were run on four amblyopes, both before and after visual training. After training, all the amblyopes showed single letter acuities as good or better than the smallest target size from which an initial VER had been obtained. Among those subjects whose attention permitted VERs to be obtained during both sessions, the initial ratios between the normal and amblyopic eyes\u27 VER amplitudes did not change significantly after training

Biofilm on Ventriculo-Peritoneal Shunt Tubing as a Cause of Treatment Failure in Coccidioidal Meningitis

We describe a case of recurrent coccidioidal meningitis in which a fungal biofilm on the tip of ventriculo-peritoneal shunt tubing was likely responsible for a 4-year persistence of Coccidioides immitis, despite the patient’s taking an adequate dosage of fluconazole. Fungal biofilms should be considered as a cause for treatment failure and fungal persistence, especially when artificial prostheses or indwelling catheters are present

REPLY TO COMMENTS OF NOLAN AND COOK

We appreciate and would like to respond to the comments made by Nolan and Cook. We make three points in our reply, which are directed at clarifying our position and responding to a few of Nolan and Cook\u27s assumptions. First, as a matter of clarification, the Palmer Drought Severity Index (PDSI) is not a measure of summer rainfall as Nolan and Cook (2010) imply. Instead it is a theoretical measure of soil-moisture, the value of which evolves over several months in response to fluxes of precipitation, evaporation, and runoff. In practice, PDSI is usually heavily weighted toward the precipitation side of the soil water balance. Second, with regard to archaeological facts, the known developmental trajectory of the greater Cahokia region is not quite as Nolan and Cook describe it. In their discussion of the timing of the precocious development of social complexity in the American Bottom, Nolan and Cook refer to the American Bottom during both the Edelhardt (A.D. 1000-1050) and Lohmann phases (A.D. 1050-1100) as being relatively wet but not the wettest areas in the Upper Mississippi and Ohio Valleys. However, Cahokia\u27s big bang dates to the end of the Edelhardt phase and continued through the Lohmann phase, so the overall climatic state of the Edelhardt phase is not at issue. Nolan and Cook\u27s Figure 2 supports the concept that the Cahokia area was extremely wet during the Lohmann phase as opposed to the Edelhardt phase

A model-based time-reversal of left ventricular motion improves cardiac motion analysis using tagged MRI data

<p>Abstract</p> <p>Background</p> <p>Myocardial motion is an important observable for the assessment of heart condition. Accurate estimates of ventricular (LV) wall motion are required for quantifying myocardial deformation and assessing local tissue function and viability. Harmonic Phase (HARP) analysis was developed for measuring regional LV motion using tagged magnetic resonance imaging (tMRI) data. With current computer-aided postprocessing tools including HARP analysis, large motions experienced by myocardial tissue are, however, often intractable to measure. This paper addresses this issue and provides a solution to make such measurements possible.</p> <p>Methods</p> <p>To improve the estimation performance of large cardiac motions while analyzing tMRI data sets, we propose a two-step solution. The first step involves constructing a model to describe average systolic motion of the LV wall within a subject group. The second step involves time-reversal of the model applied as a spatial coordinate transformation to digitally relax the contracted LV wall in the experimental data of a single subject to the beginning of systole. Cardiac tMRI scans were performed on four healthy rats and used for developing the forward LV model. Algorithms were implemented for preprocessing the tMRI data, optimizing the model parameters and performing the HARP analysis. Slices from the midventricular level were then analyzed for all systolic phases.</p> <p>Results</p> <p>The time-reversal operation derived from the LV model accounted for the bulk portion of the myocardial motion, which was the average motion experienced within the overall subject population. In analyzing the individual tMRI data sets, removing this average with the time-reversal operation left small magnitude residual motion unique to the case. This remaining residual portion of the motion was estimated robustly using the HARP analysis.</p> <p>Conclusion</p> <p>Utilizing a combination of the forward LV model and its time reversal improves the performance of motion estimation in evaluating the cardiac function.</p

A comparison of small subunit 16S ribosomal DNA recombinant plasmid clone libraries from High Point City Lake, NC

"Studies of aquatic communities represent a unique method of monitoring the health of water resources. High Point City Lake small subunit 16S ribosomal DNA clone libraries were compared across small spatial and temporal scales. This study used polymerase chain reaction and shotgun cloning to isolate individual 16S rDNA sequences. A total of 437 operational taxonomic units were found in this study. Among all libraries 84 sequences demonstrated affiliation to the phylum Proteobacteria, including representatives from the classes a, b, d, and g. The next most abundant category of putatively identified 16S ribosomal DNA was 24 sequences affiliated with the class Actinobacteria. Seventeen sequences demonstrated similarity to clones previously isolated from Crater Lake, CA bacterium. These findings suggest that variability among the replicate libraries may be a reflection of the small library size. SCHAO1 and SACE diversity estimators suggest larger libraries would be required to achieve a stable estimate of OTUs, but given the small size of each of the replicate libraries their similarity values were not unexpected. Variability among clone libraries from diurnal samples taken at the same location was low. Variability among clone libraries across short spatial scales showed suggested little difference among samples in well mixed areas of the lake, but one library may have reflected the influence of a tributary inflow. Overall, these data suggest that the 16S rDNA libraries were similar to one another."--Abstract from author supplied metadat

Ariel - Volume 5 Number 6

Editors J.D. Kanofsky Mark Dembert Entertainment Robert Breckenridge Joe Conti Gary Kaskey Photographer Scot Kastner Overseas Editor Mike Sinason Circulation Jay Amsterdam Humorist Jim McCann Staff Ken Jaffe Bob Sklaroff Janet Welsh Dave Jacoby Phil Nimoityn Frank Chervane

An Instrument to Enable Identification of Anthropogenic CO2 Emissions Using Concurrent CO Measurements

We have developed an instrument concept that will enable the measurement of CO from the top of the atmosphere to the Earth's surface with very high sensitivity and at the high spatial and temporal resolutions required by the NRC Decadal Survey mission Active Sensing of Carbon Dioxide (CO2) over Nights, Days and Seasons (ASCENDS). We are developing an innovative CO sensor that will enable the ASCENDS mission to differentiate between anthropogenic and natural sources and sinks of global carbon. The NRC Decadal Survey places particular emphasis on retrieving CO information for the planetary boundary layer. Measurement made using both the 2.3 micron and 4.7 micron channels are needed to achieve the sensitivity required in the lower atmosphere where the degree of CO - CO2 correlation is indicative of anthropogenic sources of CO2. Measurements made using only the 4.7 micron channel cannot provide sufficient sensitivity to CO in the very lowest layers of the atmosphere. The fundamental method we use is Gas Filter Correlation Radiometry (GFCR), a highly successful technique used in other airborne and space-based missions for detecting trace species in the Earth's atmosphere. Our version of GFCR overcomes many of the limitations encountered by prior and existing instruments, allowing us to measure weak signals from small targets very quickly and with extremely high specificity by employing a new dual beam radiometer concept using a focal plane array. Our design will provide a means to make the desired CO measurements for the ASCENDS mission. A simple change in gas filter cell contents would allow the same hardware to measure CH4 with high precision under the nominal ASCENDS mission spatial and temporal constraints. All critical components in the sensor design are mature, many subsystems tested, and the system has been extensively modeled, bringing it to a present Technology Readiness Level (TRL) of 3 (though some individual components are at TRLs 6-9). We are presently developing critical components for the new spectrometer and advancing our understanding of the measurement requirements for both CO and CH4. This new GFCR technique/sensor will enable measurements of trace gases with high sensitivity while maintaining the inherent robustness and simplicity of the more traditional radiometer hardware. Initial estimates of cost/risk of a spacebased 2-channel GFCR indicate that our design is extremely cost effective and will fit within existing ASCENDS mission budget constraints as determined by the NRC Decadal Survey and a NASA-sponsored mission study