Noncontacting device to indicate deflection of turbopump internal rotating parts

Phase 2 (development) which was concluded for the ultrasonic Doppler device and the light-pipe-reflectance device is reported. An ultrasonic Doppler breadboard system was assembled which accurately measured runout in the J-2 LOX pump impeller during operation. The transducer was mounted on the outside of the pump volute using a C-clamp. Vibration was measured by conducting the ultrasonic wave through the volute housing and through the fluid in the volute to the impeller surface. The impeller vibration was also measured accurately using the light-pipe probe mounted in an elastomeric-gland fitting in the pump case. A special epoxy resin developed for cryogenic applications was forced into the end of the fiber-optic probe to retain the fibers. Subsequently, the probe suffered no damage after simultaneous exposure to 2150 psi and 77 F. Preliminary flash X-radiographs were taken of the turbine wheel and the shaft-bearing-seal assembly, using a 2-megavolt X-ray unit. Reasonable resolution and contrast was obtained. A fast-neutron detector was fabricated and sensitivity was measured. The results demonstrated that the technique is feasible for integrated-time measurements requiring, perhaps, 240 revolutions to obtain sufficient exposure at 35,000 rpm. The experimental verification plans are included

Noncontacting devices to indicate deflection and vibration of turbopump internal rotating parts

Published report discusses feasibility of ultrasonic techniques; neutron techniques; X-radiography; optical devices; gamma ray devices; and conventional displacement sensors. Use of signal transmitters in place of slip rings indicated possible improvement and will be subject of futher study

Place-Based Engagement on Chicago\u27s Northeast Side

Loyola University Chicago (LUC) is a Jesuit university with a mission to prepare students to “set the world on fire” by promoting justice in the world. Led by its School of Education, LUC has worked to engage this mission in its emerging work with public school partners guided by core principles of mutual benefit among partners, place-based engagement within our communities, and a focus on sustainable relationships. While serving others represents the genotype of our 150-year-old Jesuit university and community and civic engagement represents its phenotype, the last ten years has seen change in the university’s phenotype through dramatic growth in both the strategic approach of its place-based engagement commitments and its direct work among multiple community schools. In 2011, the School of Education engineered a radical overhaul of its teacher preparation program moving from a traditional approach to teacher education that was campus- and text-based to a field-based apprenticeship model (Heineke & Ryan, 2018). To achieve this ambitious project, the School of Education generated and solidified relationships with 20-25 core school partners where field-based learning could take place. Transformation of the teacher preparation program coincided with a comprehensive school-university partnership at a neighborhood-based public high school that currently features more than 20 academic initiatives. In 2016, LUC introduced Schools 2020 to build on this success with five additional public schools. In 2018, LUC began to serve as the Lead Partner Agency (LPA) at six Chicago Public Schools (CPS) Community School Initiatives (CSI) sites. Currently more than 1000 students are served through out-of-school (OST) programs while 100 part-time instructors (LUC faculty and students, school teachers, and community organization staff ) work with students through more than 100 unique program activities. More than $4 million in CPS-CSI funding has been secured through 2024 to support this work. In this article, we seek to present the historical context in which our university-school partnership emerged and has developed, our approaches to and examples of the work, discuss challenges that have surfaced in the work and, finally, describe horizon opportunities for LUC. We argue here for a place-based, mutually beneficial approach to university-school partnerships that places relationships at the center of the work in order to achieve sustainability over time. We believe that relationships based in trust and mutuality throughout and across our institutions lead to powerful outcomes for faculty, teachers, students, and ultimately communities. We argue here that a focus on relationships can lead to organizational and community transformation in ways that transactional operational systems may not

An Emerging University-School-Community Partnership: A Story in Two Acts

This paper shares narratives regarding an institutional effort to build a sustainable partnership with schools and communities. Loyola University Chicago has developed and strengthened partnerships with eight community schools in Chicago Public Schools (CPS) District over the past decades to promote equity and social justice in the urban context. The sustainability of partnerships is an ongoing issue in university-assisted community schools. Guided by poststructuralist versions of narrative research, the five authors write and share memories about their engagement in university partnerships with communities and schools. This paper explores the “how” of partnerships rather than reiterating strategies of “what works” in partnerships. The authors articulate the complexity of community partnerships and crucial elements to consider for advancing partnerships. As examples, the authors explore the creation of a field-based teacher education program (Teaching, Learning, and Leading with Schools and Communities; TLLSC) as well as a community-centered, justice-oriented graduate program (Curriculum, Culture, and Communities; 3Cs). These degree programs focus on educating students as research practitioners in the ongoing sustainable support and collaboration among schools, universities, and communities. An asset-based frame is employed across narratives in developing and implementing degree programs and offering core courses. The subjectivities of each author enrich the conversations on ongoing efforts to build sustainable, trust-based partnerships. Drawing from our narratives, the authors hope PK-20 educators, university leaders, and community leaders collaboratively and critically reflect on their practices in partnership and utilize some of our narratives and themes as starting points of an ongoing conversation. Overall, this paper contributes to extending the approach to community partnership and equity-oriented education, highlighting the value of university-community partnerships for local schools and institutional efforts

Facultative methanotrophs are abundant at terrestrial natural gas seeps

Background: Natural gas contains methane and the gaseous alkanes ethane, propane and butane, which collectively influence atmospheric chemistry and cause global warming. Methane-oxidising bacteria, methanotrophs, are crucial in mitigating emissions of methane as they oxidise most of the methane produced in soils and the subsurface before it reaches the atmosphere. Methanotrophs are usually obligate, i.e. grow only on methane and not on longer chain alkanes. Bacteria that grow on the other gaseous alkanes in natural gas such as propane have also been characterised, but they do not grow on methane. Recently, it was shown that the facultative methanotroph Methylocella silvestris grew on ethane and propane, other components of natural gas, in addition to methane. Therefore, we hypothesised that Methylocella may be prevalent at natural gas seeps and might play a major role in consuming all components of this potent greenhouse gas mixture before it is released to the atmosphere. Results: Environments known to be exposed to biogenic methane emissions or thermogenic natural gas seeps were surveyed for methanotrophs. 16S rRNA gene amplicon sequencing revealed that Methylocella were the most abundant methanotrophs in natural gas seep environments. New Methylocella-specific molecular tools targeting mmoX (encoding the soluble methane monooxygenase) by PCR and Illumina amplicon sequencing were designed and used to investigate various sites. Functional gene-based assays confirmed that Methylocella were present in all of the natural gas seep sites tested here. This might be due to its ability to use methane and other short chain alkane components of natural gas. We also observed the abundance of Methylocella in other environments exposed to biogenic methane, suggesting that Methylocella has been overlooked in the past as previous ecological studies of methanotrophs often used pmoA (encoding the alpha subunit of particulate methane monooxygenase) as a marker gene. Conclusion: New biomolecular tools designed in this study have expanded our ability to detect, and our knowledge of the environmental distribution of Methylocella, a unique facultative methanotroph. This study has revealed that Methylocella are particularly abundant at natural gas seeps and may play a significant role in biogeochemical cycling of gaseous hydrocarbons

Sensitive high-performance liquid chromatographic method for the determination of 5-fluorouracil in plasma

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/25895/1/0000458.pd

Rapid gas--liquid chromatographic method for plasma verapamil level determination

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/25897/1/0000460.pd