Flowrate and effective area measurements of the 9H fuel nozzle

Issued as final reportGeneral Electric Compan

Building Resources for Transgender and Non-Binary Youth: A Sexual Health Toolkit

Background: Transgender and nonbinary (TGNB) youth make up almost two percent of the student population in the United States (Johns et al., 2019). They face usual challenges of adolescence, including identity, relationships with parents and peers, and body image, but also must navigate stigma, discrimination, and difficulties accessing necessary resources and information (Tankersley et al., 2021). Particularly, the sex education TGNB youth receive is often inadequate in relevant content for navigating puberty, sex, and relationships (Haley et al., 2019; Pampati et al., 2020). Youth may be left feeling ill-prepared for intimacy, puberty, or coming out, and be more likely to have negative sexual experiences (Haley et al., 2019; Riggs & Bartholomaeus, 2018) Methods: As part of the series of studies conducted by Seattle University, the University of Washington, and Seattle Children’s Hospital, focus groups were facilitated with individuals associated with health service and advocacy organizations working with TGNB youth. Three focus groups with a total of 19 participants were transcribed and analyzed with thematic analysis. Discussion: Input from participants in the focus groups mirrored many aspects of already identified recommendations. The content was integrated into a toolkit including mental health and crisis resources, expanded PrEP resources, peer connection, mental health resources and videos of adult perspectives in the TGNB and LGBTQ community. The issues identified by both TGNB youth and participants of the focus groups address issues from sexual health, mental health, relationships, and prevention of violence to gender stereotypes and toxic masculinity all of which influence overall health. Health care providers have an opportunity and obligation to address these issues as part of a holistic approach to minimize disparities

MetaComm: a meta-directory for telecommunications

Journal ArticleA great deal of corporate data is buried in network devices - such as PBX messaging/email platforms, and data networking equipment - where it is difficult to access and modify. Typically, the data is only available to the device itself for its internal purposes and it must be administered using either a proprietary interface or a standard protocol against a proprietary schema. This leads to many problems, most notably: the need for data replication and difficult interoperation with other devices and applications. MetaComm addresses these problems by providing a framework to integrate data from multiple devices into a metadirectory. The system allows user information to be modified through a directory using the LDAP protocol as well as directly through two legacy devices: a Definity ® PBX and a voice messaging system. In order to prevent data inconsistencies, updates to any system must be reflected appropriately in all systems. This paper describes how MetaComm maintains consistency when data integration is performed across several systems with no triggers and with extremely weak typing and transactional support. We also discuss implementation details and experiences

Nozzle flame holding characterization

Issued as final reportGeneral Electric Compan

Local stability analysis and eigenvalue sensitivity of reacting bluff-body wakes

This paper presents an experimental and theoretical investigation of high-Reynolds-number low-density reacting wakes near a hydrodynamic Hopf bifurcation. This configuration is applicable to the wake flows that are commonly used to stabilize flames in high-velocity flows. First, an experimental study is conducted to measure the limit-cycle oscillation of this reacting bluff-body wake. The experiment is repeated while independently varying the bluff-body lip velocity and the density ratio across the flame. In all cases, the wake exhibits a sinuous oscillation. Linear stability analysis is performed on the measured time-averaged velocity and density fields. In the first stage of this analysis, a local spatiotemporal stability analysis is performed on the measured time-averaged velocity and density fields. The stability analysis results are compared to the experimental measurement and demonstrate that the local stability analysis correctly captures the influence of the lip-velocity and density-ratio parameters on the sinuous mode. In the second stage of the analysis, the linear direct and adjoint global modes are estimated by combining the local results. The sensitivity of the eigenvalue to changes in intrinsic feedback mechanisms is found by combining the direct and adjoint global modes. This is referred to as the eigenvalue sensitivity throughout the paper for reasons of brevity. The predicted global mode frequency is consistently within 10 % of the measured value, and the linear global mode shape closely resembles the measured nonlinear oscillations. The adjoint global mode reveals that the oscillation is strongly sensitive to open-loop forcing in the shear layers. The eigenvalue sensitivity identifies a wavemaker in the recirculation zone of the wake. A parametric study shows that these regions change little when the density ratio and lip velocity change. In the third stage of the analysis, the stability analysis is repeated for the varicose hydrodynamic mode. Although not physically observed in this unforced flow, the varicose mode can lock into longitudinal acoustic waves and cause thermoacoustic oscillations to occur. The paper shows that the local stability analysis successfully predicts the global hydrodynamic stability characteristics of this flow and shows that experimental data can be post-processed with this method in order to identify the wavemaker regions and the regions that are most sensitive to external forcing, for example from acoustic waves.Matthew Juniper acknowledges the financial support of the European Research Council under grant 2590620. Tim Lieuwen acknowledges the support of the University Turbine Systems Research (contract #DE-FC21-92MC29061) program under contract monitor Dr. Mark Freeman, and the Air Force Office of Scientific Research (contract #FA9550- 12-1-0107/RC657), under contract monitor Dr. Chiping Lee.This is the author accepted manuscript. The final version is available from Cambridge University Press via http://dx.doi.org/10.1017/jfm.2015.72

Turbulent flame speed measurements and modeling of syngas fuels

Issued as final reportClemson Universit