Browsing by Subject "classification"

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The Adminstration of Public Education in Centralized and Coordinated Schools
(University of Texas at Austin, 1928-03-08) University of Texas at Austin
Best Practices for Queer Metadata
(OpenAIRE, 2024-06-29) The Queer Metadata Collective; Adolpho, Keani; Bailund, Allison; Beck, Emma; Bradshaw, Jennifer; Butler, Ellis; Bárcenas, Bianca; Caelin, Mara; Carpenter, Ruth; Day, Alison; Day, Tiffany; Dixon, Dominique; Dover, Abby; Frizzell, Sasha; Goodrich, Gideon; Hendrickson, B. L.; Keller, Tim; Misorski, Chloe; Murphy, Devon; Newlin, Rachel; Rawdon, Katy; Riccardi, Em; Rodriguez, Arielle; Springman, Abby; Tardy, Garth; Tarnawsky, Andrea; Thompson, Abbey; Uchimura, Elizabeth; Watson, B. M.; Williams, Adrian; Yragui, Crystal
This document is the result of two years of work by a group of nearly one hundred knowledge organisers, cataloguers, librarians, archivists, scholars, and information professionals with a concerted interest in improving the metadata treatment of queer people, communities, and items in GLAMS (Galleries, Libraries, Archives, Museums, and Special Collections) and other informational institutions. Their work has been supported by over 800 peer reviewers; combined, these groups make up the Queer Metadata Collective (QMDC). The QMDC builds upon earlier work done by the Trans Metadata Collective (TMDC), a similarly-organised group of metadata workers and information professionals with a concerted interest in improving the metadata representation of trans and gender-diverse people. The work of the TMDC culminated in Metadata Best Practices for Trans and Gender Diverse Resources, focusing on the description, cataloguing, and classification of information resources as well as the creation of metadata about trans and gender-diverse people, including authors, communities, and other creators. Following the publication of the Best Practices, several TMDC members founded and developed the QMDC over the summer of 2022. This document focuses on metadata by and about queer people, communities, and resources. While there is significant overlap between queer metadata and trans and gender diverse metadata, QMDC’s recommendations should not be seen as excluding or superseding TMDC’s, as trans and gender diverse people, communities, and resources have specific needs. For best practices and recommendations about trans and gender-diverse resources, please consult the TMDC document. If the TMDC and QMDC recommendations conflict (we are not aware of any instances in which they do), prefer the TMDC document for trans and gender diverse resources and the QMDC for other types of queer resources.
The Composition Of Normative Groups And Diagnostic Decision Making: Shooting Ourselves In The Foot
(2006-08) Pena, Elizabeth D.; Spaulding, Tammie J.; Plante, Elena; Pena, Elizabeth D.
Purpose: The normative group of a norm-referenced test is intended to provide a basis for interpreting test scores. However, the composition of the normative group may facilitate or impede different types of diagnostic interpretations. This article considers who should be included in a normative sample and how-this decision must be made relative to the purpose for which a test is intended. Method: The way in which the composition of the normative sample affects classification accuracy is demonstrated through a test review followed by a simulation study. The test review examined the descriptions of the normative group in a sample of 32 child language tests. The mean performance reported in the test manual for the sample of language impaired children was compared with the sample's norms, which either included or excluded children with language impairment. For the simulation, 2 contrasting normative procedures were modeled. The first procedure included a mixed group of representative cases (language impaired and normal cases). The second procedure excluded the language impaired cases from the norm. Results: Both the data obtained from test manuals and the data simulation based on population characteristics supported our claim that use of mixed normative groups decreases the ability to accurately identify language impairment. Tests that used mixed norms had smaller differences between the normative and language impaired groups in comparison with tests that excluded children with impairment within the normative sample. The simulation demonstrated mixed norms that lowered the group mean and increased the standard deviation, resulting in decreased classification accuracy. Conclusions: When the purpose of testing is to identify children with impaired language skills, including children with language impairment in the normative sample can reduce identification accuracy.
Fiberedness of almost-Montesinos knots
(2015-05) Miller, Maggie; Gordon, Cameron
In this paper we begin to classify fiberedness of "Almost-Montesinos" knots, a generalization of Montesinos knots. We employ the method used in the classification of fiberedness of Montesinos knots due to Hirasawa and Murasugi. To achieve this classification, we find minimal-genus surfaces of "skew pretzel links" (a generalization of pretzel links) via sutured manifold decompositions, following Gabai's method for pretzel links. We end by stating three remaining cases.
Field Identification and Classification of Coastal Dunes, Galveston County, Texas
(1995) Morton, Robert A.; Gutierrez, Roberto, 1951-; Gibeaut, James
As part of the Texas Natural Resources Inventory (NRI), beach and dune profiles were surveyed at 33 transects spaced 7,000 to 10,000 ft apart along the Gulf shore of Galveston County. These surveys were conducted to establish the position of the dune protection line and the vegetation line. Geographic positions of the dune protection line and the vegetation line on each transect were obtained with geodetic quality Global Positioning System (GPS) receivers. The GPS positions were converted to state plane coordinates to facilitate entry into ARC/INFO, the NRI geographic information system. Dune characteristics such as height, continuity, density of vegetative cover, and location with respect to the Gulf shore were recorded to determine the occurrence and distribution of different dune types. The functional relationships and response of different dune types to storm conditions were reviewed, and an ordinal ranking of dunes was prepared. On one end of the spectrum are high, continuous well-vegetated foredune ridges, and on the other end are low, isolated, barren or sparsely vegetated coppice mounds.
Finding Ultracool Brown Dwarfs With MegaCam On CFHT: Method And First Results
(2008-06) Delorme, P.; Willott, C. J.; Forveille, T.; Delfosse, X.; Reyle, C.; Bertin, E.; Albert, L.; Artigau, E.; Robin, A. C.; Allard, F.; Doyon, R.; Hill, G. J.; Hill, G. J.
Aims. We present the first results of a wide field survey for cool brown dwarfs with the MegaCam camera on the CFHT telescope, the Canada-France Brown Dwarf Survey, hereafter CFBDS. Our objectives are to find ultracool brown dwarfs and to constrain the field-brown dwarf mass function thanks to a larger sample of L and T dwarfs. Methods. We identify candidates in CFHT/MegaCam i' and z' images using optimised psf-fitting within Source Extractor, and follow them up with pointed near-infrared imaging on several telescopes. Results. We have so far analysed over 350 square degrees and found 770 brown dwarf candidates brighter than z'(AB) = 22.5. We currently have J-band photometry for 220 of these candidates, which confirms 37% as potential L or T dwarfs. Some are among the reddest and farthest brown dwarfs currently known, including an independent identification of the recently published ULAS J003402.77-005206.7 and the discovery of a second brown dwarf later than T8, CFBDS J005910.83-011401.3. Infrared spectra of three T dwarf candidates confirm their nature, and validate the selection process. Conclusions. The completed survey will discover similar to 100 T dwarfs and similar to 500 L dwarfs or M dwarfs later than M8, approximately doubling the number of currently known brown dwarfs. The resulting sample will have a very well-defined selection function, and will therefore produce a very clean luminosity function.
A Framework for the Design of Biomimetic Cellular Materials for Additive Manufacturing
(University of Texas at Austin, 2017) McNulty, T.; Bhate, D.; Zhang, A.; Kiser, M.A.; Ferry, L.; Suder, A.; Bhattacharya, S.; Boradkar, P.
Cellular materials such as honeycombs and lattices are an important area of research in Additive Manufacturing due to their ability to improve functionality and performance. While there are several design choices when selecting a unit cell, it is not always apparent what the optimum cellular design for a particular application is. This becomes particularly challenging when seeking an optimal design for more than one function, or when the design needs to transition spatially between different functions. Nature abounds with examples of cellular materials that are able to achieve multifunctionality, but designers lack the ability to translate the underlying principles in these examples to their design tools. In this work, we propose a framework to bridge the gap between nature and designer. We present a classification of natural cellular materials based on their structure and function, and relate them in a manner amenable for use in guiding design for Additive Manufacturing.
High-Resolution H-Band Spectroscopy Of Be Stars With SDSS-III/Apogee. I. New Be Stars, Line Identifications, And Line Profiles
(2015-01) Chojnowski, S. Drew; Whelan, David G.; Wisniewski, John P.; Majewski, Steven R.; Hall, Matthew; Shetrone, Matthew; Beaton, Rachael; Burton, Adam; Damke, Guillermo; Eikenberry, Steve; Hasselquist, Sten; Holtzman, Jon A.; Meszaros, Szabolcs; Nidever, David; Schneider, Donald P.; Wilson, John; Zasowski, Gail; Bizyaev, Dmitry; Brewington, Howard; Brinkmann, J.; Ebelke, Garrett; Frinchaboy, Peter M.; Kinemuchi, Karen; Malanushenko, Elena; Malanushenko, Viktor; Marchante, Moses; Oravetz, Daniel; Pan, Kaike K.; Simmons, Audrey; Shetrone, Matthew D.
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) has amassed the largest ever collection of multi-epoch, high-resolution (R similar to 22, 500), H-band spectra for B-type emission line (Be) stars. These stars were targeted by APOGEE as telluric standard stars and subsequently identified via visual inspection as Be stars based on H I Brackett series emission or shell absorption in addition to otherwise smooth continua and occasionally non-hydrogen emission features. The 128/238 APOGEE Be stars for which emission had never previously been reported serve to increase the total number of known Be stars by similar to 6%. Because the H band is relatively unexplored compared to other wavelength regimes, we focus here on identification of the H-band lines and analysis of the emission peak velocity separations (Delta v(p)) and emission peak intensity ratios (V/R) of the usually double-peaked H I and nonhydrogen emission lines. H I Br11 emission is found to preferentially form in the circumstellar disks at an average distance of similar to 2.2 stellar radii. Increasing Delta v(p) toward the weaker Br12-Br20 lines suggests these lines are formed interior to Br11. By contrast, the observed IR Fe II emission lines present evidence of having significantly larger formation radii; distinctive phase lags between IR Fe II and H I Brackett emission lines further supports that these species arise from different radii in Be disks. Several emission lines have been identified for the first time including C I 16895, a prominent feature in the spectra for almost a fifth of the sample and, as inferred from relatively large Delta v(p) compared to the Br11-Br20, a tracer of the inner regions of Be disks. Emission lines at 15760 angstrom and 16781 angstrom remain unidentified, but usually appear along with and always have similar line profile morphology to Fe II 16878. Unlike the typical metallic lines observed for Be stars in the optical, the H-band metallic lines, such as Fe II 16878, never exhibit any evidence of shell absorption, even when the H I lines are clearly shell-dominated. The first known example of a quasi-triple-peaked Br11 line profile is reported for HD 253659, one of several stars exhibiting intra- and/or extraspecies V/R and radial velocity variation within individual spectra. Br11 profiles are presented for all discussed stars, as are full APOGEE spectra for a portion of the sample.
HR 8257: A Three-Dimensional Orbit And Basic Properties
(2009-04) Fekel, Francis C.; Boden, Andrew F.; Tomkin, Jocelyn; Torres, Guillermo; Tomkin, Jocelyn
We have used interferometric and spectroscopic observations of HR 8257 to determine a three-dimensional orbit of the system. The orbit has a period of 12.21345 days and an eccentricity of 0.2895. The masses of the F0 and F2 dwarf components are 1.56 and 1.38M(circle dot), respectively, with fractional errors of 1.4%. Our orbital parallax of 13.632 +/- 0.095 mas, corresponding to a distance of 73.4 +/- 0.6 pc, differs from the Hipparcos result by just 2% and has a significantly smaller uncertainty. From our spectroscopic observations and spectral energy distribution modeling we determine the component effective temperatures and luminosities to be T(eff)(A) = 7030 +/- 200K and T(eff)(B) = 6560 +/- 200K and L(A) = 9.4 +/- 0.3 L(circle dot) and L(B) = 4.7 +/- 0.2 L(circle dot). The primary rotates pseudosynchronously, while the secondary is not far from its pseudosynchronous rotational velocity. Although both early-F stars are slowly rotating, neither component of this close binary is an Am star. A comparison with evolutionary tracks indicates that the stars are slightly metal poor, and although the components have evolved away from the zero-age main sequence, they are both still dwarfs.
Letter from Carl Blegen to Emmett Bennett Jr., December 1, 1953
(1953-12-01) Blegen, Carl William
Letter from Emmett Bennett Jr. to Carl Blegen, April 16, 1949
(1949-04-16) Bennett, Emmett L. Jr.
Letter from Emmett Bennett Jr. to Carl Blegen, February 20, 1949
(1949-02-20) Bennett, Emmett L. Jr.
Letter from Emmett Bennett Jr. to Carl Blegen, October 29, 1953
(1953-10-29) Bennett, Emmett L. Jr.
Letter from Emmett Bennett Jr. to Carl Blegen, October 8, 1948
(1948-10-08) Bennett, Emmett L. Jr.
Letter from John Chadwick to Emmett Bennett Jr., October 24, 1967
(1967-10-24) Chadwick, John
Letter to A.Myra Keen from H.B. Stenzel on 1961-05-19
(1961-05-19) Stenzel, H.B.
Letter to A.Myra Keen from H.B. Stenzel on 1962-02-26
(1962-02-26) Stenzel, H.B.
Letter to Andre Chavan from Raymond C. Moore on 1965-03-03
(1965-03-03) Moore, Raymond C.
Letter to Daniel Pajaud from H.B. Stenzel on 1967-12-01
(1967-12-01) Stenzel, H.B.
Letter to F.K. North from H.B. Stenzel on 1948-11-28
(1948-11-28) Stenzel, H.B.