Molecular Gas Content of HI Monsters and Implications to Cold Gas Content Evolution in Galaxies

We present 12CO (J=1-0) observations of a sample of local galaxies (0.04<z<0.08) with a large neutral hydrogen reservoir, or "HI monsters". The data were obtained using the Redshift Search Receiver on the FCRAO 14 m telescope. The sample consists of 20 HI-massive galaxies with M(HI)>3e10Msun from the ALFALFA survey and 8 LSBs with a comparable M(HI) (>1.5e10Msun). Our sample selection is purely based on the amount of neutral hydrogen, thereby providing a chance to study how atomic and molecular gas relate to each other in these HI-massive systems. We have detected CO in 15 out of 20 ALFALFA selected galaxies and 4 out of 8 LSBs with molecular gas mass M(H2) of (1-11)e9Msun. Their total cold gas masses of (2-7e10Msun make them some of the most gas-massive galaxies identified to date in the Local Universe. Observed trends associated with HI, H2, and stellar properties of the HI massive galaxies and the field comparison sample are analyzed in the context of theoretical models of galaxy cold gas content and evolution, and the importance of total gas content and improved recipes for handling spatially differentiated behaviors of disk and halo gas are identified as potential areas of improvement for the modeling.Comment: 18 pages, 11 figures, 2 tables; Accepted for publication in MNRA

The Feeling of Foam & Other Essays

I create conceptual drawings, collages, sculptures, and installations to humorously destabilize and ultimately question how human language, formal methodologies, and social institutions function. While seemingly embracing an aesthetic of rationality, I undermine it with absurdity. In my work, I take a fundamentally dialectical position by skewering the rational to the illogical as neither can exist without the other

The Interaction Between Spending Policies and Asset Allocation for College and University Endowment

The analysis revealed better combinations of asset allocation and spending policy for college and university endowments that efficiently balance the desirable outcomes of stable spending in real terms against maintaining the purchasing power of the endowment over time (intergenerational equity). Using the variability and correlation of historical asset class returns, we created a forward-looking, projection-based, multivariate Monte Carlo simulation of individual asset class returns. The simulation incorporates the relationships between inflation and asset class returns, and the relationships among asset class returns. The projected time series of asset class returns produced a time series of endowment portfolio returns given an asset allocation. Applying a spending policy to each time series of portfolio returns generated the associated time series of spending and endowment values in nominal and inflation-adjusted terms. We tested 18 different endowment combinations (6 asset allocations x 3 spending policies) to examine three crucial endowment management decisions concerning: alternative assets in asset allocation, equity assets in asset allocation, and inflation factors in spending policy. Our findings suggest that inflation-adjusted spending policies combined with portfolios that include alternative assets and greater equity allocations are better for achieving intergenerational equity. In addition to the specific combinations studied, the simulation engine that was developed can be extended and utilized to test multiple additional asset allocation and spending policy combinations to further our understanding of this important issue

A portable device for nucleic acid quantification powered by sunlight, a flame or electricity.

A decentralized approach to diagnostics can decrease the time to treatment of infectious diseases in resource-limited settings. Yet most modern diagnostic tools require stable electricity and are not portable. Here, we describe a portable device for isothermal nucleic-acid quantification that can operate with power from electricity, sunlight or a flame, and that can store heat from intermittent energy sources, for operation when electrical power is not available or reliable. We deployed the device in two Ugandan health clinics, where it successfully operated through multiple power outages, with equivalent performance when powered via sunlight or electricity. A direct comparison between the portable device and commercial qPCR (quantitative polymerase chain reaction) machines for samples from 71 Ugandan patients (29 of which were tested in Uganda) for the presence of Kaposi's sarcoma-associated herpesvirus DNA showed 94% agreement, with the four discordant samples having the lowest concentration of the herpesvirus DNA. The device's flexibility in power supply provides a needed solution for on-field diagnostics

China Near Seas Combat Capabilities

The capstone U.S. Defense Department study on the future operational environment declares, China\u27s rise represents the most significant single event on the international horizon since the collapse of the Cold War. Understanding and assessing changes in China\u27s traditionally defensive naval strategy, doctrine, and force structure are of obvious importance to the U.S. Navy (USN) and other Pacific navies concerned with the possible security implications of that rise. This chapter examines the development of the Chinese navy\u27s Houbei (Type 022) fast-attack-craft force and its roles and missions in China\u27s near seas and discusses implications for the U.S. Navy and other navies in the region.https://digital-commons.usnwc.edu/cmsi-red-books/1010/thumbnail.jp