Using distributional similarity to organise biomedical terminology

We investigate an application of distributional similarity techniques to the problem of structural organisation of biomedical terminology. Our application domain is the relatively small GENIA corpus. Using terms that have been accurately marked-up by hand within the corpus, we consider the problem of automatically determining semantic proximity. Terminological units are dened for our purposes as normalised classes of individual terms. Syntactic analysis of the corpus data is carried out using the Pro3Gres parser and provides the data required to calculate distributional similarity using a variety of dierent measures. Evaluation is performed against a hand-crafted gold standard for this domain in the form of the GENIA ontology. We show that distributional similarity can be used to predict semantic type with a good degree of accuracy

The Green Wave of Electrification: Systems Solution to the Energy Challenges Facing the U.S.

Atlanta Conference on Science and Innovation Policy 2009This presentation was part of the session : Achieving National and Global GoalsIEEE-US

Laudato Si’ and the Consumption Challenge: Giving Students a Visceral Exercise in Saving Our Planet

Laudato Si’ is arguably the most comprehensive, powerful, and influential manifesto in the canon of environment stewardship. Pope Francis calls for nothing short of upending our consumer culture in the service of saving the planet. Gandhi’s plea to “live simply so that others may simply live” is the Pope’s ultimate admonition in his encyclical and the essence of his call to action on behalf of human survival. The following discussion highlights an innovative and powerful classroom experience pioneered in one of Regis University’s capstone interdisciplinary seminars. The transformational learning outcomes of this Consumption Challenge (the name of the assignment) eclipsed all reasonable expectations and delivered to its students a visceral connection to what Pope Francis is asking from us in Laudato Si’. Furthermore, the basic structure of this experiential course assignment can be used across all disciplines in Jesuit higher education. The authors offer this exercise as a tested and proven vehicle for bringing to our students the critical hopes, expectations, and personal challenges of the Pope’s historic encyclical

A Glimpse at Quasar Host Galaxy Far-UV Emission, Using DLAs as Natural Coronagraphs

In merger-driven models of massive galaxy evolution, the luminous quasar phase is expected to be accompanied by vigorous star formation in quasar host galaxies. In this paper, we use high column density Damped Lyman Alpha (DLA) systems along quasar sight lines as natural coronagraphs to directly study the far-UV (FUV) radiation from the host galaxies of luminous background quasars. We have stacked the spectra of $\sim$2,000 DLA systems (N_HI>10^{20.6} cm^{-2}) with a median absorption redshift = 2.6 selected from quasars observed in the SDSS-III Baryon Oscillation Spectroscopic Survey. We detect residual flux in the dark troughs of the composite DLA spectra. The level of this residual flux significantly exceeds systematic errors in the SDSS fiber sky subtraction; furthermore, the residual flux is strongly correlated with the continuum luminosity of the background quasar, while uncorrelated with DLA column density or metallicity. We conclude that the flux could be associated with the average FUV radiation from the background quasar host galaxies (with medium redshift < z > = 3.1) that is not blocked by the intervening DLA. Assuming all of the detected flux originates from quasar hosts, for the highest quasar luminosity bin (= 2.5x 10^{13} L_sun), the host galaxy has a FUV intensity of 1.5 +/- 0.2 x 10^{40} erg s^{-1} A^{-1}; this corresponds to an unobscured UV star formation rate of 9 M_sun/yr.Comment: 15 pages, 10 figures, Accepted for publication in Ap

Using Local Knowledge, Hydrologic, and Climate Data to Develop a Driftwood Harvest Model in Interior Alaska

Many rural Alaska residents rely on harvested driftwood from the Yukon River for fuel and construction materials, however they have stated that the character of the summer discharge in the Yukon River is changing and affecting their ability to harvest this resource. We examined whether the perceived changes in driftwood availability are related to changes in river hydrology and how changes in hydrology may affect future driftwood flows and the livelihoods of rural Alaskans.IAB, NSF, RAP, WERC, Alaska APSCo

A glimpse at quasar host galaxy Far-UV emission using damped Lyα's as natural coronagraphs

In merger-driven models of massive galaxy evolution, the luminous quasar phase is expected to be accompanied by vigorous star formation in quasar host galaxies. In this paper, we use high column density damped Lyα (DLA) systems along quasar sight lines

Phonons, electronic charge response and electron-phonon interaction in the high-temperature superconductors

We investigate in the framework of linear response theory the complete phonon dispersion, phonon induced electronic charge response, electron-phonon interaction and dielectric and infrared properties of the high-temperature superconductors (HTSC's). In particular the experimentally observed strong renormalization of the in-plane oxygen bond-stretching modes (OBSM) which appear upon doping in the HTSC's is discussed. It is shown that the characteristic softening, indicating a strong EPI, is most likely a generic effect of the CuO plane and is driven by a nonlocal coupling of the displaced ions to the localized charge-fluctuations (CF's) at the Cu and O ions. The different behaviour of the OBSM during the insulator-metal transition via the underdoped phase is calculated and from a comparison of these modes conclusions about the electronic state in the HTSC's are drawn. The underdoped state is modelled in terms of a charge response which is insulator-like at the Cu and is competing with a metallic charge response at the O-network in the CuO plane. For the non-cuprate HTSC Ba-Bi-O also a strong renormalization of the OBSM is predicted. C-axis polarized infrared and Raman-active modes of the HTSC's are calculated in terms of CF's and anisotropic dipole-fluctuations and the problem of a metallic character of the BiO planes is studied.Interlayer phonons and their accompanying charge response are investigated. Depending on the interlayer coupling calculations are performed from the static, adiabatic- to the non-adiabatic regime.It is shown that phonon-plasmon mixing and a strong long-ranged non-adiabatic EPI becomes evident within a certain region around the c-axis. Both the OBSM and the non-adiabatic coupled c-axis phonon-plasmon modes are found to be important for pairing in the HTSC's.Comment: 65 pages,20 figures. Extended version to appear in Physica Status Solidi (b) 2004; figure 20 has been corrected; references have been adde

Enhancing Supercapacitor Electrochemical Performance with 3D Printed Cellular PEEK/MWCNT Electrodes Coated with PEDOT: PSS

In this study, we examine the electrochemical performance of supercapacitor (SC) electrodes made from 3D-printed nanocomposites. These composites consist of multiwalled carbon nanotubes (MWCNTs) and polyether ether ketone (PEEK), coated with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). The electrochemical performance of a 3D-printed PEEK/MWCNT solid electrode with a surface area density of 1.2 mm–1 is compared to two distinct periodically porous PEEK/MWCNT electrodes with surface area densities of 7.3 and 7.1 mm–1. To enhance SC performance, the 3D-printed electrodes are coated with a conductive polymer, PEDOT:PSS. The architected cellular electrodes exhibit significantly improved capacitive properties, with the cellular electrode (7.1 mm–1) displaying a capacitance nearly four times greater than that of the solid 3D-printed electrode-based SCs. Moreover, the PEDOT:PSS-coated cellular electrode (7.1 mm–1) demonstrates a high specific capacitance of 12.55 mF·cm–3 at 50 mV·s–1, contrasting to SCs based on 3D-printed cellular electrodes (4.09 mF·cm–3 at 50 mV·s–1) without the coating. The conductive PEDOT:PSS coating proves effective in reducing surface resistance, resulting in a decreased voltage drop during the SCs’ charging and discharging processes. Ultimately, the 3D-printed cellular nanocomposite electrode with the conductive polymer coating achieves an energy density of 1.98 μW h·cm–3 at a current of 70 μA. This study underscores how the combined effect of the surface area density of porous electrodes enabled by 3D printing, along with the conductivity imparted by the polymer coating, synergistically improves the energy storage performance