305 research outputs found
Inland extent of the Weddell Sea Rift imaged by new aerogeophysical data
No full textThe Weddell Sea Rift was a major focus for Jurassic extension and magmatism during the early stages of Gondwana break-up and underlies the Weddell Sea Embayment, which separates East Antarctica from a collage of crustal blocks in West Antarctica. Newly-collected aerogeophysical data over the catchments of Institute and Möller ice streams reveal the inland extent of the Weddell Sea Rift against the Ellsworth-Whitmore block and a hitherto unknown major left-lateral strike slip boundary between East and West Antarctica. Aeromagnetic and gravity anomalies define the regional subglacial extent of Proterozoic basement, Middle Cambrian rift-related volcanic rocks, Jurassic intrusions and sedimentary rocks of inferred post-Jurassic age. 2D and 3D magnetic depth-to-source estimates were used to help constrain joint magnetic and gravity models for the region. The models reveal that Proterozoic crust similar to that exposed at Haag Nunataks, extends southeast of the Ellsworth Mountains to the margin of the Coastal Basins. Thick granitic Jurassic intrusions are modelled at the transition between the Ellsworth-Whitmore block and the thinner crust of the Weddell Sea Rift and within the Pagano Shear Zone. The crust beneath the inland extension of the Weddell Sea Rift is modelled as being either ~ 4 km thinner compared to the adjacent Ellsworth-Whitmore block or as underlain by an up to 8 km thick mafic underplate
Clean subglacial access: prospects for future deep hot-water drilling
No full textAccessing and sampling subglacial environments deep beneath the Antarctic Ice Sheet presents several challenges to existing drilling technologies. With over half of the ice sheet believed to be resting on a wet bed, drilling down to this environment must conform to international agreements on environmental stewardship and protection, making clean hot-water drilling the most viable option. Such a drill, and its water recovery system, must be capable of accessing significantly greater ice depths than previous hot-water drills, and remain fully operational after connecting with the basal hydrological system. The Subglacial Lake Ellsworth (SLE) project developed a comprehensive plan for deep (greater than 3000?m) subglacial lake research, involving the design and development of a clean deep-ice hot-water drill. However, during fieldwork in December 2012 drilling was halted after a succession of equipment issues culminated in a failure to link with a subsurface cavity and abandonment of the access holes. The lessons learned from this experience are presented here. Combining knowledge gained from these lessons with experience from other hot-water drilling programmes, and recent field testing, we describe the most viable technical options and operational procedures for future clean entry into SLE and other deep subglacial access targets.<br/
Tropospheric radiative forcing from El Chichón and Mt. Pinatubo: theory and observations
No full textSeptember 1994.Also issued as Ellsworth G. Dutton's dissertation (Ph.D.) -- Colorado State University, 1995.The possibility of volcanic effects on global and regional climate variables has had a long history of speculation, correlative study, and proposed physical mechanisms. The potential for widespread surface cooling following the extensive spreading of long-lived stratospheric aerosols following major volcanic eruptions is based on the partial blocking of solar radiation incident at the top of the troposphere. Relatively simple physical mechanisms oppose this potential for cooling: dominant forward solar scattering and absorption of outgoing infrared radiation by the aerosols. More complex considerations are the spatial and temporal variations of the distributed aerosol and its optical and physical properties; potential for water/ice cloud modification by the volcanic particles; surface albedo, water vapor, and cloud feedbacks to a temperature change; the role of the oceans in a large-scale radiatively forced temperature variation; possible circulation modifications; and other forced and· random variations in climate. In the current work, rigorous radiative transfer calculations relative to a subset of the above considerations are carried out and compared to observational data to examine deterministic volcanic effects on climate. Specifically, zonally resolved volcanic radiative forcing at the tropopause, and other levels, is computed from the best available information on the spatial and temporal distribution of volcanic aerosols from two recent eruptions, El Chichon (Mexico, 1982) and Mt. Pinatubo (Philippines, 1991). Accuracy of the radiative calculations is partially verified with surface- and satellite-based irradiance observations. Maximum global seasonal-mean radiative forcings of -4.5 and -2.2 W m-2 are calculated following the Mt. Pinatubo and El Chichon eruptions, respectively. Within hemisphere irradiance gradient anomalies of up to 16% at the tropopause are calculated for the second N. Hemisphere summer following the eruptions. The computed radiative forcing is applied to a simple hemispheric tropospheric temperature change model, assuming constant cloudiness and surface albedo, in an effort to explain observed global temperature records (NOM Microwave Sounding Unit) following the two eruptions. Excellent agreement is seen between explained (modeled) and observed global and hemispheric temperature changes after the Mt. Pinatubo eruption, but not following that of El Chichon. Details of this work and some discussion of the results are given. A simple parameterization of the radiative forcing calculations is given that may prove useful in higher spatial and temporal resolution investigations.Sponsored by the National Oceanic and Atmospheric Administration; the Climate Monitoring and Diagnostics Laboratory; and the National Aeronautics & Space Administration
Variations in precipitation as affecting water works engineering /
No full text"With accompanying discussions by William W. Brush, Andrew J. Provost, Jr., Francis F. Longley, John C. Trautwine Jr., Sidney K. Clapp, Nicholas S. Hill, Jr., Ellsworth Huntington, and the author.""Reprinted from the Journal of The American Water Works Association, Vol. 3, No. 1, March 1916."Cover title.Mode of access: Internet
An investigation of the post high school outcomes of individuals with disabilities, and teacher and parent perceptions of transition services provided in a western Wisconsin school district
No full textPlan BThe purpose of this study was to evaluate the outcome of students with disabilities after leaving high school. Secondly, this research explores teacher and parent attitudes about transition services provided by the school to students with disabilities. A historical framework was based on the research of significant legislative acts that have shaped the implementation of transition services. Data was collected to research the areas of independent living, postsecondary education, and the employment of former graduates and dropouts who exited high school between May 2000 and May 2001. These former students received services from the special education program while in high school. Furthermore, the perceptions of teachers and parents of former students who received special education services were assessed to supplement student feedback. Data analysis was constructed by the use of numbers and individual student, teacher, and parent suggestions. Results from this study indicate that there is a blend of positive and negative former student outcomes within the school district. One to 2 years after exiting high school, the majority of the students were employed and working full-time. Most of the students were earning less than $10 per hour and living with a parent or relative; however, nearly ½ were attending postsecondary education and working. Teachers and parents indicated that the school district has offered several beneficial services to students in past years including extracurricular activities, the school-to-work program, and the summer youth work program. As students evolve and individual’s needs change there continues to be a need to evaluate and improve transition programming. Students, teachers, and parents agreed that additional classes or curriculum were needed to allow students to practice monetary management, independent living, and job attainment skills. Further study is recommended to determine the post high school outcomes, and parent and teacher suggestions within the same district in 2 years to assess transition program progress
Joint contingency contracting
No full textAcquisition research (Graduate School of Business & Public Policy)MBA Professional ReportThe purpose of this Master Business Administration (MBA) Professional Report is to investigate and analyze the means by which Contingency Contracting Officers (CCO) can effectively operate in a Joint contingency environment and to validate the Defense Contract Management Agency's (DCMA) entry and exit criteria for contingency contracting missions. Joint contingencies encompass regional conflicts, humanitarian and peacekeeping missions, and international or domestic disaster relief missions supported with the immediate deployment of military forces. This research was accomplished by reviewing the current guidance, policies, and doctrine pertinent to contingency contracting operations and conducting personal interviews. The researchers conducted interviews with representatives of the Joint Staff, J4 (Logistics), each Service Component's acquisition headquarters, U.S. Central Command's J4 (Logistics), U.S. Pacific Command's J4 (Logistics, Engineering, and Security Assistance), and the DCMA to explore how contingency contracting operations are planned and executed; current issues and lessons learned; and understand the current structure/organization of Service Component and Combatant Command for accomplishing contingency contracting. Conclusions and recommendations address perceived shortfalls in the methodologies the Services use to plan, communicate, integrate and execute contingency contracting operations. Three possible solutions to these shortfalls include adoption of the Yoder Three-Tier Model, establishment of the Joint Contingency Contracting Command (JCCC), and the creation of universal language for conducting contracting in contingencies.Approved for public release; distribution is unlimited.http://archive.org/details/jointcontingency1094546
Efficient recovery of whole blood RNA - a comparison of commercial RNA extraction protocols for high-throughput applications in wildlife species
No full textConclusion: By carefully choosing the appropriate RNA extraction method, whole blood can become a valuable source for high-throughput applications like expression arrays or transcriptome sequencing from natural populations. Additionally, candidate genes showing signs of selection could subsequently be genotyped in large population samples using whole blood as a source for RNA without harming individuals from rare or endangered species
Building brain capital
No full textBrains are indispensable drivers of human progress. Why not invest more heavily in them? We seek to place Brain Capital at the center of a new narrative to fuel economic and societal recovery and resilience.Fil: Eyre, Harris A.. Organisation for Economic Co-operation and Development; Francia. The PRODEO institute; Estados Unidos. Deakin University; Australia. Baylor College of Medicine; Estados UnidosFil: Ayadi, Rym. Euro-Mediterranean Economists Association; EspañaFil: Ellsworth, William. University of Stanford; Estados UnidosFil: Aragam, Gowri. University of Stanford; Estados UnidosFil: Smith, Erin. University of Stanford; Estados Unidos. The PRODEO institute; Estados Unidos. Organisation for Economic Co-operation and Development; FranciaFil: Dawson, Walter D.. Portland State University; Estados Unidos. University of California; Estados Unidos. University of Oregon; Estados UnidosFil: Ibañez, Agustin Mariano. University of California; Estados Unidos. Trinity College Dublin; Irlanda. Universidad Adolfo Ibañez; Chile. Universidad de San Andrés. Departamento de Matemáticas y Ciencias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Altimus, Cara. Milken Institute; Estados UnidosFil: Berk, Michael. Deakin University; Australia. University of Melbourne; AustraliaFil: Manji, Husseini K.. Johnson & Johnson, Science for Minds; Estados UnidosFil: Storch, Eric A.. Baylor College of Medicine; Estados UnidosFil: Leboyer, Marion. University Paris Est Créteil; FranciaFil: Kawaguchi, Naoko. Organisation for Economic Co-operation and Development; FranciaFil: Freeman, Michael. University of California; Estados UnidosFil: Brannelly, Patrick. Gates Ventures Alzheimer’s Disease; Estados UnidosFil: Manes, Facundo Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Neurociencia Cognitiva. Fundación Favaloro. Instituto de Neurociencia Cognitiva; ArgentinaFil: Chapman, Sandra B.. University of Texas; Estados UnidosFil: Cummings, Jeffrey. University Of Nevada; Estados UnidosFil: Graham, Carol. Brookings Institution; Estados Unidos. University of Maryland; Estados Unidos. Gallup, Inc.; Estados UnidosFil: Miller, Benjamin F.. Wellbeing Trust; Estados Unidos. University Of Colorado Anschutz Medical Campus.; Estados UnidosFil: Sarnyai, Zoltan. James Cook University; AustraliaFil: Meyer, Retsina. Delix Therapeutics; Estados UnidosFil: Hynes, William. Organisation for Economic Co-operation and Development; Franci
DISPERSED FLUORESCENCE SPECTROSCOPY OF HCO IN A FREE-JET EXPANSION
No full textAuthor Institution: Department of Chemistry, Hope College, Holland, MI 49423High resolution dispersed fluorescence (DF) spectra of the excited vibrational levels in formaldehyde have been recorded to describe its S potential energy surface. Formaldehyde was cooled in a free-jet expansion and excited with a laser to the 4, 4, 34 and 5 levels in S. The resulting fluorescence was dispersed with a monochromator to yield S vibrational spectra. Over 268 vibrational transitions have been assigned and fit to a polyad model. The model includes harmonic and anharmonic terms, and also accounts for resonances among vibrational levels. The results are compared to ab initio calculations
THE ELEVENTH AND TWELFTH DATA RELEASES OF THE SLOAN DIGITAL SKY SURVEY: FINAL DATA FROM SDSS-III
No full textCitation: Alam, S., Albareti, F. D., Prieto, C. A., Anders, F., Anderson, S. F., Anderton, T., . . . Zhu, G. T. (2015). THE ELEVENTH AND TWELFTH DATA RELEASES OF THE SLOAN DIGITAL SKY SURVEY: FINAL DATA FROM SDSS-III. Astrophysical Journal Supplement Series, 219(1), 27. doi:10.1088/0067-0049/219/1/12The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution spectrograph, and a novel optical interferometer. All of the data from SDSS-III are now made public. In particular, this paper describes Data Release 11 (DR11) including all data acquired through 2013 July, and Data Release 12 (DR12) adding data acquired through 2014 July (including all data included in previous data releases), marking the end of SDSS-III observing. Relative to our previous public release (DR10), DR12 adds one million new spectra of galaxies and quasars from the Baryon Oscillation Spectroscopic Survey (BOSS) over an additional 3000 deg(2) of sky, more than triples the number of H-band spectra of stars as part of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE), and includes repeated accurate radial velocity measurements of 5500 stars from the Multi-object APO Radial Velocity Exoplanet Large-area Survey (MARVELS). The APOGEE outputs now include the measured abundances of 15 different elements for each star. In total, SDSS-III added 5200 deg(2) of ugriz imaging; 155,520 spectra of 138,099 stars as part of the Sloan Exploration of Galactic Understanding and Evolution 2 (SEGUE-2) survey; 2,497,484 BOSS spectra of 1,372,737 galaxies, 294,512 quasars, and 247,216 stars over 9376 deg(2); 618,080 APOGEE spectra of 156,593 stars; and 197,040 MARVELS spectra of 5513 stars. Since its first light in 1998, SDSS has imaged over 1/3 of the Celestial sphere in five bands and obtained over five million astronomical spectra.Additional Authors: Berlind, A. A.;Beutler, F.;Bhardwaj, V.;Bird, J. C.;Bizyaev, D.;Blake, C. H.;Blanton, M. R.;Blomqvist, M.;Bochanski, J. J.;Bolton, A. S.;Bovy, J.;Bradley, A. S.;Brandt, W. N.;Brauer, D. E.;Brinkmann, J.;Brown, P. J.;Brownstein, J. R.;Burden, A.;Burtin, E.;Busca, N. G.;Cai, Z.;Capozzi, D.;Rosell, A. C.;Carr, M. A.;Carrera, R.;Chambers, K. C.;Chaplin, W. J.;Chen, Y. C.;Chiappini, C.;Chojnowski, S. D.;Chuang, C. H.;Clerc, N.;Comparat, J.;Covey, K.;Croft, R. A. C.;Cuesta, A. J.;Cunha, K.;da Costa, L. N.;Da Rio, N.;Davenport, J. R. A.;Dawson, K. S.;De Lee, N.;Delubac, T.;Deshpande, R.;Dhital, S.;Dutra-Ferreira, L.;Dwelly, T.;Ealet, A.;Ebelke, G. L.;Edmondson, E. M.;Eisenstein, D. J.;Ellsworth, T.;Elsworth, Y.;Epstein, C. R.;Eracleous, M.;Escoffier, S.;Esposito, M.;Evans, M. L.;Fan, X. H.;Fernandez-Alvar, E.;Feuillet, D.;Ak, N. F.;Finley, H.;Finoguenov, A.;Flaherty, K.;Fleming, S. W.;Font-Ribera, A.;Foster, J.;Frinchaboy, P. M.;Galbraith-Frew, J. G.;Garcia, R. A.;Garcia-Hernandez, D. A.;Perez, A. E. G.;Gaulme, P.;Ge, J.;Genova-Santos, R.;Georgakakis, A.;Ghezzi, L.;Gillespie, B. A.;Girardi, L.;Goddard, D.;Gontcho, S. G. A.;Hernandez, J. I. G.;Grebel, E. K.;Green, P. J.;Grieb, J. N.;Grieves, N.;Gunn, J. E.;Guo, H.;Harding, P.;Hasselquist, S.;Hawley, S. L.;Hayden, M.;Hearty, F. R.;Hekker, S.;Ho, S.;Hogg, D. W.;Holley-Bockelmann, K.;Holtzman, J. A.;Honscheid, K.;Huber, D.;Huehnerhoff, J.;Ivans, II;Jiang, L. H.;Johnson, J. A.;Kinemuchi, K.;Kirkby, D.;Kitaura, F.;Klaene, M. A.;Knapp, G. R.;Kneib, J. P.;Koenig, X. P.;Lam, C. R.;Lan, T. W.;Lang, D. T.;Laurent, P.;Le Goff, J. M.;Leauthaud, A.;Lee, K. G.;Lee, Y. S.;Licquia, T. C.;Liu, J.;Long, D. C.;Lopez-Corredoira, M.;Lorenzo-Oliveira, D.;Lucatello, S.;Lundgren, B.;Lupton, R. H.;Mack, C. E.;Mahadevan, S.;Maia, M. A. G.;Majewski, S. R.;Malanushenko, E.;Malanushenko, V.;Manchado, A.;Manera, M.;Mao, Q. Q.;Maraston, C.;Marchwinski, R. C.;Margala, D.;Martell, S. L.;Martig, M.;Masters, K. L.;Mathur, S.;McBride, C. K.;McGehee, P. M.;McGreer, I. D.;McMahon, R. G.;Menard, B.;Menzel, M. L.;Merloni, A.;Meszaros, S.;Miller, A. A.;Miralda-Escude, J.;Miyatake, H.;Montero-Dorta, A. D.;More, S.;Morganson, E.;Morice-Atkinson, X.;Morrison, H. L.;Mosser, B.;Muna, D.;Myers, A. D.;Nandra, K.;Newman, J. A.;Neyrinck, M.;Nguyen, D. C.;Nichol, R. C.;Nidever, D. L.;Noterdaeme, P.;Nuza, S. E.;O'Connell, J. E.;O'Connell, R. W.;O'Connell, R.;Ogando, R. L. C.;Olmstead, M. D.;Oravetz, A. E.;Oravetz, D. J.;Osumi, K.;Owen, R.;Padgett, D. L.;Padmanabhan, N.;Paegert, M.;Palanque-Delabrouille, N.;Pan, K. K.;Parejko, J. K.;Paris, I.;Park, C.;Pattarakijwanich, P.;Pellejero-Ibanez, M.;Pepper, J.;Percival, W. J.;Perez-Fournon, I.;Perez-Rafols, I.;Petitjean, P.;Pieri, M. M.;Pinsonneault, M. H.;de Mello, G. F. P.;Prada, F.;Prakash, A.;Price-Whelan, A. M.;Protopapas, P.;Raddick, M. J.;Rahman, M.;Reid, B. A.;Rich, J.;Rix, H. W.;Robin, A. C.;Rockosi, C. M.;Rodrigues, T. S.;Rodriguez-Torres, S.;Roe, N. A.;Ross, A. J.;Ross, N. P.;Rossi, G.;Ruan, J. J.;Rubino-Martin, J. A.;Rykoff, E. S.;Salazar-Albornoz, S.;Salvato, M.;Samushia, L.;Sanchez, A. G.;Santiago, B.;Sayres, C.;Schiavon, R. P.;Schlegel, D. J.;Schmidt, S. J.;Schneider, D. P.;Schultheis, M.;Schwope, A. D.;Scoccola, C. G.;Scott, C.;Sellgren, K.;Seo, H. J.;Serenelli, A.;Shane, N.;Shen, Y.;Shetrone, M.;Shu, Y. P.;Aguirre, V. S.;Sivarani, T.;Skrutskie, M. F.;Slosar, A.;Smith, V. V.;Sobreira, F.;Souto, D.;Stassun, K. G.;Steinmetz, M.;Stello, D.;Strauss, M. A.;Streblyanska, A.;Suzuki, N.;Swanson, M. E. C.;Tan, J. C.;Tayar, J.;Terrien, R. C.;Thakar, A. R.;Thomas, D.;Thomas, N.;Thompson, B. A.;Tinker, J. L.;Tojeiro, R.;Troup, N. W.;Vargas-Magana, M.;Vazquez, J. A.;Verde, L.;Viel, M.;Vogt, N. P.;Wake, D. A.;Wang, J.;Weaver, B. A.;Weinberg, D. H.;Weiner, B. J.;White, M.;Wilson, J. C.;Wisniewski, J. P.;Wood-Vasey, W. M.;Yeche, C.;York, D. G.;Zakamska, N. L.;Zamora, O.;Zasowski, G.;Zehavi, I.;Zhao, G. B.;Zheng, Z.;Zhou, X.;Zhou, Z. M.;Zou, H.;Zhu, G. T
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