Reliability of Semiautomated Kinetic Perimetry (SKP) and Goldmann Kinetic Perimetry in Children and Adults With Retinal Dystrophies.

PurposeTo investigate the precision of visual fields (VFs) from semiautomated kinetic perimetry (SKP) on Octopus 900 perimeters, for children and adults with inherited retinal degenerations (IRDs). Goldmann manual kinetic perimetry has long been used in the diagnosis and follow-up of these patients, but SKP is becoming increasingly common. Octopus VFs (OVFs) and Goldmann VFs (GVFs) were both mapped on two occasions.MethodsNineteen females and 10 males with IRDs were tested on OVFs and GVFs, with two targets per test (V4e and one smaller target). Tests were performed in the same (randomized) order at two visits about 1 week apart. The VFs were digitized to derive isopter solid angles. Comparisons, within and between visits, were performed with paired t-tests and Bland-Altman plots.ResultsMedian age was 20 years (range, 7-70; 10 participants aged ≤17 years old). There were no significant differences in solid angles between OVFs and GVFs (P ≥ 0.06) or between the two visits' solid angles on either perimeter (P ≥ 0.30). Between-visit test-retest variability for GVFs and OVFs was similar (P ≥ 0.73), with median values of approximately 9% to 13%. Overall variability was lower for children than adults (medians of 7.5% and 12.8%, respectively).ConclusionsOctopus SKP and Goldmann perimetry produced VFs of similar size and variability.Translational relevanceOur study indicates that SKP provides a viable alternative to traditional Goldmann perimetry in clinical trials or care involving both children and adults with IRDs

Security risk analysis of the data communications network proposed in the NextGen air traffic control system

Scope and Method of Study: Aerospace Security Stakeholder Qualitative Interviews.Interests internal and external to the United States could wreak havoc by manipulating, impairing, or data mining the digital information being exchanged by aircraft and controllers in the proposed NextGen air traffic control system.The purpose of this study is the analyze potential security risks imposed by implementing the active network technologies utilized by ADS-B in NextGen, and more specifically the air-to-air, air-to-ground, and satellite-to-air links used. The purpose of this study was to provide a risk analysis of the NextGen active network compared to industry standards and best practices for information systems security. Data obtained through interviews was used to determine the effective security categorization and provide a risk analysis of the ADS-B portion of the proposed NextGen active network.Findings and Conclusions: Based on this research, there are both significant similarities and differences between the NextGen Active Network and industry standard computer networks. Both the ADS-B and computer networks operate in a wireless environment. Both are designed to move information between local devices, though the ADS-B devices may cover 200-300 miles at altitude where the computer networks are designed to cover a range of 200- 300 feet. Both have methods of insuring a high level of data integrity using FEC, CRC, 24-bit parity, or MAC codes. It is at this point that the similarities diverge, as the missions of the two networks are markedly different. Specific conclusions and recommendations cover the differences between the designed mission requirements of NextGen and existing computer security standards focusing on the security objectives within the Federal Information Security Management Act of 2002 and other pertinent government standards and industry best practices

Use of an Inner-city Well-baby Clinic

This prospective, longitudinal investigation examined factors that influenced the use of well-baby services among a low-income, minority, high-risk group. The health belief model was used as the theoretical framework. Data were collected from 44 primiparous, black mothers attending an urban maternal child health care clinic by interviews at the first and sixth months after the birth of their infants. Analysis focused on the cues component of the model and explored the kinds of cues that influenced the mothers to bring their babies to the well-baby clinic. One important finding was that for mothers influenced by health information from radio or television, FYI commercials on television were most often reported.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72805/1/j.1525-1446.1987.tb00535.x.pd

Design and characterisation of titanium nitride sub-arrays of kinetic inductance detectors for passive terahertz imaging

We report on the investigation of titanium nitride (TiN) thin films deposited via atomic layer deposition (ALD) for microwave kinetic inductance detectors (MKID). Using our in-house ALD process, we have grown a sequence of TiN thin films (thickness 15, 30, 60 nm). The films have been characterised in terms of superconducting transition temperature Tc , sheet resistance Rs and microstructure. We have fabricated test resonator structures and characterised them at a temperature of 300 mK. At 350 GHz, we report an optical noise equivalent power NEPopt≈2.3×10−15 W/√Hz , which is promising for passive terahertz imaging applications

Third Dredge-up in Low Mass Stars: Solving the LMC Carbon Star Mystery

A long standing problem with asymptotic giant branch (AGB) star models has been their inability to produce the low-luminosity carbon stars in the Large and Small Magellanic Clouds. Dredge-up must begin earlier and extend deeper. We find this for the first time in our models of LMC metallicity. Such features are not found in our models of SMC metallicity. The fully implicit and simultaneous stellar evolution code STARS has been used to calculate the evolution of AGB stars with metallicities of Z=0.008 and Z=0.004, corresponding to the observed metallicities of the Large and Small Magellanic Clouds, respecitively. Third dredge-up occurs in stars of 1Msol and above and carbon stars were found for models between 1Msol and 3Msol. We use the detailed models as input physics for a population synthesis code and generate carbon star luminosity functions. We now find that we are able to reproduce the carbon star luminosity function of the LMC without any manipulation of our models. The SMC carbon star luminosity function still cannot be produced from our detailed models unless the minimum core mass for third dredge-up is reduced by 0.06Msol.Comment: 6 pages, 5 figures. Accepted for publication in MNRA

Photoionization of High Altitude Gas in a Supernova-Driven Turbulent Interstellar Medium

We investigate models for the photoionization of the widespread diffuse ionized gas in galaxies. In particular we address the long standing question of the penetration of Lyman continuum photons from sources close to the galactic midplane to large heights in the galactic halo. We find that recent hydrodynamical simulations of a supernova-driven interstellar medium have low density paths and voids that allow for ionizing photons from midplane OB stars to reach and ionize gas many kiloparsecs above the midplane. We find ionizing fluxes throughout our simulation grids are larger than predicted by one dimensional slab models, thus allowing for photoionization by O stars of low altitude neutral clouds in the Galaxy that are also detected in Halpha. In previous studies of such clouds the photoionization scenario had been rejected and the Halpha had been attributed to enhanced cosmic ray ionization or scattered light from midplane H II regions. We do find that the emission measure distributions in our simulations are wider than those derived from Halpha observations in the Milky Way. In addition, the horizontally averaged height dependence of the gas density in the hydrodynamical models is lower than inferred in the Galaxy. These discrepancies are likely due to the absence of magnetic fields in the hydrodynamic simulations and we discuss how magnetohydrodynamic effects may reconcile models and observations. Nevertheless, we anticipate that the inclusion of magnetic fields in the dynamical simulations will not alter our primary finding that midplane OB stars are capable of producing high altitude diffuse ionized gas in a realistic three-dimensional interstellar medium.Comment: ApJ accepted. 17 pages, 7 figure

Educational Technology and Distance Supervision in Counselor Education

The authors used a nonexperimental descriptive design to examine the prevalence of distance supervision in counselor education programs, educational technology used in supervision, training on technology in supervision, and participants\u27 (N = 673) perceptions of legal and ethical compliance. Program policies are recommended to guide the training and use of technology in supervision