93,715 research outputs found

    Drawing as Process: Expansiveness Through Constraint

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    This paper explores the concept of drawing as a time-based practice, where the process is the core of the artwork rather than the finished product. I divide my artistic concerns into four chapters, each advancing on the previous one, to discuss my drawing practice, which allows for exploration of time and space across a wide array of media and styles of representation. I embrace impulse and intuition in the mark-making process, letting go of control while prioritizing the form of depicted figures over their image. This paper highlights the importance of my inner contradiction and how the process reflects my thought patterns, rather than simply the result. Additionally, I find affinity in the works of referenced artists and writers, including Amy Sillman, Brian Rutenberg, Steffani Jemison, and Sarah Sze, as their theories that examine the process of making are relevant to my practice. Eventually, my improvised experiments of drawing in my thesis artwork, Geese, Why Geese?, exemplify the features of my works that explore the boundaries between progress and product, discipline and madness, and opens new possibilities to find expansiveness through constraint

    A poor man's positive energy theorem: II. Null geodesics

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    We show that positivity of energy for stationary, or strongly uniformly Schwarzschildian, asymptotically flat, non-singular domains of outer communications can be proved using Galloway's null rigidity theorem.Comment: Latex2e, 24 A4 pages, minor change

    Cauchy horizons in Gowdy space times

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    We analyse exhaustively the structure of \emph{non-degenerate} Cauchy horizons in Gowdy space-times, and we establish existence of a large class of non-polarized Gowdy space-times with such horizons. Added in proof: Our results here, together with deep new results of H. Ringstr\"om (talk at the Miami Waves conference, January 2004), establish strong cosmic censorship in (toroidal) Gowdy space-times.Comment: 25 pages Latex. Further information at http://grtensor.org/gowdy

    Classifiers With a Reject Option for Early Time-Series Classification

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    Early classification of time-series data in a dynamic environment is a challenging problem of great importance in signal processing. This paper proposes a classifier architecture with a reject option capable of online decision making without the need to wait for the entire time series signal to be present. The main idea is to classify an odor/gas signal with an acceptable accuracy as early as possible. Instead of using posterior probability of a classifier, the proposed method uses the "agreement" of an ensemble to decide whether to accept or reject the candidate label. The introduced algorithm is applied to the bio-chemistry problem of odor classification to build a novel Electronic-Nose called Forefront-Nose. Experimental results on wind tunnel test-bed facility confirms the robustness of the forefront-nose compared to the standard classifiers from both earliness and recognition perspectives

    Does asymptotic simplicity allow for radiation near spatial infinity?

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    A representation of spatial infinity based in the properties of conformal geodesics is used to obtain asymptotic expansions of the gravitational field near the region where null infinity touches spatial infinity. These expansions show that generic time symmetric initial data with an analytic conformal metric at spatial infinity will give rise to developments with a certain type of logarithmic singularities at the points where null infinity and spatial infinity meet. These logarithmic singularities produce a non-smooth null infinity. The sources of the logarithmic singularities are traced back down to the initial data. It is shown that is the parts of the initial data responsible for the non-regular behaviour of the solutions are not present, then the initial data is static to a certain order. On the basis of these results it is conjectured that the only time symmetric data sets with developments having a smooth null infinity are those which are static in a neighbourhood of infinity. This conjecture generalises a previous conjecture regarding time symmetric, conformally flat data. The relation of these conjectures to Penrose's proposal for the description of the asymptotic gravitational field of isolated bodies is discussed.Comment: 22 pages, 4 figures. Typos and grammatical mistakes corrected. Version to appear in Comm. Math. Phy

    Paths to the Baccalaureate at a Hispanic-Serving Institution: The Lived Experiences of Latinos who Entered Higher Education at the Community College

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    The U.S. Census indicates that Hispanic participation in postsecondary education tripled between 1996 and 2016. If the traditional outcome measure of the six-year graduation rate is used, however, increased participation has not resulted in an increased number of Latinos who complete a bachelor’s degree. Further, typical examinations of baccalaureate completion have focused on the starting point—beginning at a community college or beginning at a four-year college or university and compare percentages of completion by race or ethnicity. Findings of such studies point to the disparity in bachelor’s degree completion rates between Latinos and other racial and ethnic groups and that the disparity is even greater among individuals who begin postsecondary education at the community college. This paper follows an anti-deficit approach to gain a greater understanding of the complexities of baccalaureate completion of Latina/o students beyond the common measure of a six-year timeframe and the simplified starting point of the community college. Learning from the success of the participants may provide insight helpful to educational leaders who seek to provide access and facilitate the success of Latino students

    On "many black hole" space-times

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    We analyze the horizon structure of families of space times obtained by evolving initial data sets containing apparent horizons with several connected components. We show that under certain smallness conditions the outermost apparent horizons will also have several connected components. We further show that, again under a smallness condition, the maximal globally hyperbolic development of the many black hole initial data constructed by Chrusciel and Delay, or of hyperboloidal data of Isenberg, Mazzeo and Pollack, will have an event horizon, the intersection of which with the initial data hypersurface is not connected. This justifies the "many black hole" character of those space-times.Comment: several graphic file

    Seven Hills Winery Brochure 2008

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    A Seven Hills Winery brochure announces a new label design and three summer wine releases: the 2007 Pinot Gris (Oregon), the 2006 Merlot (Seven Hills Vineyard, Walla Walla Valley), and the 2006 Ciel du Cheval (vintage red wine blend, Red Mountain)
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