Technology: The Air and Space Force\u27s Barrier to Innovation

The Department of Defense is a rank-and-file institution that values orders adherence and a zero-error mentality, which has led commanders to be risk averse. This is exemplified in the cybersecurity realm, with controls attempting to protect all information, including uncontrolled unclassified information. Efforts that attempt to employ a new or different type of information technology are made very difficult by a number of existing policies. Additionally, customer surveys, service initiatives, and open user complaints have revealed dissatisfaction with Department of the Air Force (DAF) IT services. The millennial and post-millennial generations are the most technologically adept, yet the majority of these Airmen and Guardians are technologically stifled in today\u27s DAF. The combination of underperforming tech, high resource security controls, and cumbersome IT policy results in a rigid, oversaturated network. These obstacles prevent the Space Force, a user of DAF IT services, from achieving its own service goals

Thermal-distortion analysis of a spacecraft box truss in geostationary orbit

The Mission to Planet Earth enlists the use of a geostationary platform to support Earth science monitoring instruments. The strongback for a proposed geostationary platform is a deployable box truss that supports two large diameter passive microwave radiometer (PMR) and several other science instruments. A study was performed to estimate the north-south and east-west pointing errors at the mounting locations of the two PMRs due to on-orbit thermal distortions of the main truss. The baseline configuration indicated that the east-west pointing error greatly exceeded the required limits. Primary origins of the pointing errors were identified, and methods for their reduction were discussed. Thermal performance enhancements to the truss structure were modeled and analyzed, including state-of-the-art surface coatings and insulation techniques. Comparisons of the thermal enhancements to the baseline were performed. Results demonstrated that using a thermal enclosure insulating technique reduced external heat fluxes, and distributed those heat fluxes more evenly throughout the structure, sufficiently reducing the pointing error to satisfy pointing accuracy requirements for the PMR's

Insights into the nature of northwest-to-southeast aligned ionospheric wavefronts from contemporaneous Very Large Array and ionosondes observations

The results of contemporaneous summer nighttime observations of midlatitude medium scale traveling ionospheric disturbances (MSTIDs) with the Very Large Array (VLA) in New Mexico and nearby ionosondes in Texas and Colorado are presented. Using 132, 20-minute observations, several instances of MSTIDs were detected, all having wavefronts aligned northwest to southeast and mostly propagating toward the southwest, consistent with previous studies of MSTIDs. However, some were also found to move toward the northeast. It was found that both classes of MSTIDs were only found when sporadic-E (Es) layers of moderate peak density (1.5<foEs<3 MHz) were present. Limited fbEs data from one ionosonde suggests that there was a significant amount of structure with the Es layers during observations when foEs>3 MHz that was not present when 1.5<foEs<3 MHz. No MSTIDs were observed either before midnight or when the F-region height was increasing at a relatively high rate, even when these Es layers were observed. Combining this result with AE indices which were relatively high at the time (an average of about 300 nT and maximum of nearly 700 nT), it is inferred that both the lack of MSTIDs and the increase in F-region height are due to substorm-induced electric fields. The northeastward-directed MSTIDs were strongest post-midnight during times when the F-region was observed to be collapsing relatively quickly. This implies that these two occurrences are related and likely both caused by rare shifts in F-region neutral wind direction from southwest to northwest.Comment: Accepted for publication in the Journal of Geophysical Researc

Conflicts of Interest in Clinical Practice Guidelines

Clinical practice guidelines are used increasingly across medical specialties and settings, making evaluation of their utility and validity a critical public health issue. In this paper, we describe some of the challenges that specialty organizations face as they try to ensure that their guidelines are trustworthy and useful. We examine the practice guidelines for Major Depressive Disorder recently published by the American Psychiatric Association (APA), identify five sources of potential bias that may affect the guideline development process and offer suggestions based on our review. For example, even for mild depression, this guideline privileges pharmacotherapy over other interventions, despite questions about the risk/benefit ratio and the increasing concern over the iatrogenic harms of SSRIs and SNRIs. We compare recommendations from international scientific groups (e.g. NICE) with those produced by specialty societies in an effort to demonstrate some of the ways in which conflicts of interest, both intellectual and financial, may unduly influence guidelines

'We capture their comments before we leave the station': Service user involvement in the delivery of Appropriate Adult Schemes

The concept of participation is now widely accepted in healthcare and social services, but is less apparent in the delivery of services for vulnerable people who encounter the Criminal Justice System and its associated agencies (Buck et al, 2020). This article considers the extent to which children and ‘vulnerable’ adults who have been detained in police custody are currently able to actively participate in the design and delivery of Appropriate Adult Schemes. This paper draws together responses from 43 services in England and Wales concerning levels of service user engagement to ascertain the current level of participation, and to make recommendations for the future. The paper applies Forbat, et al.'s (2009) models of service user involvement to conceptualise ideological drivers which underpin the Appropriate Adult Scheme's commitment to involvement. The data reveal that while there is a genuine desire to improve service user participation, that institutional, financial, and attitudinal barriers mean that participation either does not occur or is at a very cursory level

Gap Probabilities for Edge Intervals in Finite Gaussian and Jacobi Unitary Matrix Ensembles

The probabilities for gaps in the eigenvalue spectrum of the finite dimension $N \times N$ random matrix Hermite and Jacobi unitary ensembles on some single and disconnected double intervals are found. These are cases where a reflection symmetry exists and the probability factors into two other related probabilities, defined on single intervals. Our investigation uses the system of partial differential equations arising from the Fredholm determinant expression for the gap probability and the differential-recurrence equations satisfied by Hermite and Jacobi orthogonal polynomials. In our study we find second and third order nonlinear ordinary differential equations defining the probabilities in the general $N$ case. For N=1 and N=2 the probabilities and thus the solution of the equations are given explicitly. An asymptotic expansion for large gap size is obtained from the equation in the Hermite case, and also studied is the scaling at the edge of the Hermite spectrum as $N \to \infty$, and the Jacobi to Hermite limit; these last two studies make correspondence to other cases reported here or known previously. Moreover, the differential equation arising in the Hermite ensemble is solved in terms of an explicit rational function of a {Painlev\'e-V} transcendent and its derivative, and an analogous solution is provided in the two Jacobi cases but this time involving a {Painlev\'e-VI} transcendent.Comment: 32 pages, Latex2