78 FR 19000 - Montezuma National Wildlife Refuge, Cayuga, Seneca, and Wayne Counties, NY; Final Comprehensive...

Science.gov (United States)

2013-03-28

...-568- 5987 (phone), or Lia McLaughlin, Planning Team Leader, 413-253-8575 (phone); email... Conservation (NYSDEC), and other partners for its role in the conservation of migratory birds, particularly.... Newly acquired lands would not be converted to impoundments. Natural succession would play a larger role...

78 FR 43184 - Meeting of the National Commission on the Structure of the Air Force

Science.gov (United States)

2013-07-19

..., Director, Operational Planning, Policy and Strategy, Deputy Chief of Staff, Operations, Plans and... Staff, and Major General James McLaughlin, Commander, 24th Air Force and Commander, Air Forces Cyber...; (e) maintains a peacetime rotation force to support operational tempo goals of 1:2 for regular...

Radio Frequency Identification (RFID) Based Corrosion Monitoring Sensors. Part 2: Application and Testing of the Coating Materials

Science.gov (United States)

2014-12-22

Shona McLaughlin2, Jason S. H. Lo1, Chao Shi1, Jared Lenos3, and Andrew Vincelli4 1CanmetMATERIALS, Natural Resources Canada, 183 Longwood Road...Steel”, REVISTA DE METALURGIA, 2011, 47, 426-444. Figures Fig. 1 EMI shielding effectiveness calculated via Equation (1) vs

Strategic Improvements to TSA Spot Program

Science.gov (United States)

2015-03-01

supporting me in this program, and specifically, Assistant Administrators Robin Kane, John Sanders, and Chris McLaughlin for their sponsorship. I hope...analysis. Edited by Michael Borenstein, Larry V. Hedges, Julian P. T. Higgins , and Hannah R. Rothstein, 377–387. Chichester, UK: John Wiley & Sons, 2009

76 FR 63359 - Endangered and Threatened Wildlife and Plants; Proposed Designation of Critical Habitat for the...

Science.gov (United States)

2011-10-12

... tolerance, and gill function; reducing spawning habitat, reproductive success, and egg, larval, and juvenile...; reducing spawning habitat, reproductive success, and egg, larvae, and juvenile development; reducing food... storms and droughts (McLaughlin et al. 2002, p. 6074; Golladay et al. 2004, p. 504; Cook et al. 2004, p...

77 FR 6813 - President's National Security Telecommunications Advisory Committee

Science.gov (United States)

2012-02-09

... instructions for submitting written comments. Email: [email protected]hq.dhs.gov . Include the docket number in the... Schaffer, Assistant Secretary for Cybersecurity and Communications, an update on the Cloud Computing Subcommittee from Mr. Mark McLaughlin, Chair of the Cloud Computing Subcommittee, and an update on the National...

Development | Page 29 | IDRC - International Development ...

International Development Research Centre (IDRC) Digital Library (Canada)

David McLaughlin (President and CEO Canada's National Round Table on the Environment and the Economy). Read more about Creating Adaptive Policies: A Guide for Policy-making in an Uncertain World. Language English. Un ouvrage essentiel pour quiconque souhaite comprendre les conflits et le développement au ...

Développement | Page 29 | CRDI - Centre de recherches pour le ...

International Development Research Centre (IDRC) Digital Library (Canada)

David McLaughlin (President and CEO Canada's National Round Table on the Environment and the Economy). Read more about Creating Adaptive Policies: A Guide for Policy-making in an Uncertain World. Langue English. Un ouvrage essentiel pour quiconque souhaite comprendre les conflits et le développement au ...

Epidemiology, public health, and the rhetoric of false positives

DEFF Research Database (Denmark)

Blair, Aaron; Saracci, Rodolfo; Vineis, Paolo

2009-01-01

BACKGROUND: As an observational science, epidemiology is regarded by some researchers as inherently flawed and open to false results. In a recent paper, Boffetta et al. [Boffetta P, McLaughlin JK, LaVecchia C, Tarone RE, Lipworth L, Blot WJ. False-positive results in cancer epidemiology: a plea f...

The Mom Study: Parenting Stress and Attachment in Mothers of Young Children with and without Co-Morbid Special Needs

Science.gov (United States)

Caplan, Stacie

2010-01-01

Recent literature on the psychological adjustment of parents who have children with disabilities suggests that they encounter a range of challenges beyond those experienced by parents of typically developing children (Achiless, G.M., McLaughlin, M J , & Croninger, R.G. 2007; Brown & Pacini, 1989). This is particularly true when a special…

Problem Sets: Fundamentals Of Transportation And Traffic Operations

OpenAIRE

Daganzo, Carlos F.

1998-01-01

These problem sets comprise a supplement to Fundamentals of Transportation and Traffic Operations (C. Daganzo, Pergamon, 1997). Academicians can also obtain a companion set of solutions by writing to "Institute of Transportation Studies, Publications Office, 109 McLaughlin Hall, University of California, Berkeley, CA 94720" or by sending e-mail to .

World Reference Center for Arboviruses

Science.gov (United States)

1994-06-07

Rodriguez, S.C., Tesh, R., Travassos da Rosa, J.F.S., and Travassos da Rosa, E.S. Infeccao humana adquirida in laboratorio causada pelo virus SPH 114202...Arenavirus: familia Arenaviridae): Aspectos clinicos e laboratoriais. Rev. Inst. Med. Trop. Sao Paulo 35:521-525, 1993. Vodkin, M.H., McLaughlin, G.L

Idiopathic Retroperitoneal Hematoma

African Journals Online (AJOL)

6. Stewart BT, McLaughlin SJ, Thompson GA. Spontaneous retroperitoneal haemorrhage:a general surgeon's perspective. Aust N. Z J Surg 1998;68:371-3. Monib, et al.: Idiopathic retroperitoneal hematoma. How to cite this article: Monib S, Ritchie A, Thabet E. Idiopathic retroperitoneal hematoma. J Surg Tech Case Report ...

The Effectiveness of the Smog Index in Determining the Reading Levels of Business and Distributive Education Texts.

Science.gov (United States)

Schultheis, Robert A.; Anderson, Roberta

1982-01-01

McLaughlin's Smog Index was compared to the Dale-Chall formula for the determination of reading levels of 48 textbooks in business and distributive education. A Modified Smog Index proved a valid substitute for the Dale-Chall formula when used to evaluate the reading levels of business and distributive education narrative. (Author/CT)

Leaders' Views on the Values of School-Based Research: Contemporary Themes and Issues

Science.gov (United States)

Bryan, Hazel; Burstow, Bob

2017-01-01

In 2004, McLaughlin, Black-Hawkins and McIntyre published a literature review that explored the ways in which individual teachers, whole schools and groups of networked schools were engaging in practitioner research and enquiry. In the light of significant changes to the education landscape, the empirical research in this article provides an…

Securing the U.S. Transportation Command

Science.gov (United States)

2016-03-11

Optimization Capabilities Storyboard White Paper Air Centric (Draft),” TCAC-F/TCAC-SL, 13 Sept. 2011. 8. USTRANSCOM, “AT21 Time-Phased Optimization...Capabilities Storyboard White Paper Deployment Sealift Centric (Draft),” TCAC-F/SDTE-ST, 5 Dec. 2011. 9. D.J. Pohly, S. McLaughlin, P. McDaniel, and K

Intelligence-Driven Border Security: A Promethean View of U.S. Border Patrol Intelligence Operations

Science.gov (United States)

2015-12-01

Journal of Criminology 49 no. 5 (2009): 628–645. 28 Torin Monahan, “The Future of Security? Surveillance Operations at Homeland Security Fusion...terrorism Imagining Future Crime in the ‘War on Terror.’” British Journal of Criminology 49 no. 5 (2009): 628–645. McLaughlin, John. “Serving the

Volume 9 Number 1

African Journals Online (AJOL)

OLUWOLE

payment for all initial assemblage, storage, processing ... offer farmers or firms more than they can do themselves. Besides ... The broad objective of the study is to analyse .... Decision rule: if the mean score is ≥ 2.5; ..... Policy. Enugu: Fulladu Publishing. Company. Barallat, J. E., W. McLaughlin and D.R. Lee ... implications.

Pop / Mart Niineste

Index Scriptorium Estoniae

Niineste, Mart, 1983-

2006-01-01

Heliplaatidest: Soda Effect "Goodbye Fantasy", Morrissey "Ringleaders of the Tormentors", Loka "Fire Shepherds", Bruce Springsteen "We Shall Overcome. The Seeger Sessions", Zero 7 "The Garden", Graham Coxon "Love Travels At Illegal Speeds", Godsmack "IV", John McLaughlin "Industrial Zen", Pearl Jam "Pearl Jam", Goo Goo Dolls "Let Love In", Suburban Tribe "Revolt Now!"

Candidate R&D Thrusts for the Software Technology Initiative.

Science.gov (United States)

1981-05-01

Seen as the Result, Not the Cause of Per- formance Problems." Data Management vol. 19, no. 4 (April, 1981), p. 22. McLaughlin, R. A.. "That Old Bugaboo ...magnitude of the synergistic effect. The decision on what set of candidates to select resembles an investment portfolio decision, but has interdependencies

Embracing Learners' Ideas about Diffusion and Osmosis: A Coupled-Inquiry Approach

Science.gov (United States)

Sweeney, Ryan M.; Martin-Hansen, Lisa; Verma, Geeta; Dunkhase, John

2009-01-01

Learning about osmosis and diffusion is often a challenging task for middle school students. Here the authors present a lesson that was converted from a "cookbook" lab (McLaughlin and Thompson 2007) into a more inquiry-oriented lab that uses inquiry teaching strategies and hands-on investigations to teach middle-grade students about osmosis and…

Report of the AACRAO Professional Competencies and Proficiencies Working Group

Science.gov (United States)

American Association of Collegiate Registrars and Admissions Officers (AACRAO), 2015

2015-01-01

Interest on the part of the American Association of Collegiate Registrars and Admissions Officers (AACRAO) Board of Directors in the development of a set of descriptions of the core competencies for AACRAO professions goes back several years, with more active discussion beginning in 2011 under the leadership of AACRAO President Nora McLaughlin. At…

Simply Performance Assessment

Science.gov (United States)

McLaughlin, Cheryl A.; McLaughlin, Felecia C.; Pringle, Rose M.

2013-01-01

This article presents the experiences of Miss Felecia McLaughlin, a fourth-grade teacher from the island of Jamaica who used the model proposed by Bass et al. (2009) to assess conceptual understanding of four of the six types of simple machines while encouraging collaboration through the creation of learning teams. Students had an opportunity to…

Overgroups of root groups in classical groups

CERN Document Server

Aschbacher, Michael

2016-01-01

The author extends results of McLaughlin and Kantor on overgroups of long root subgroups and long root elements in finite classical groups. In particular he determines the maximal subgroups of this form. He also determines the maximal overgroups of short root subgroups in finite classical groups and the maximal overgroups in finite orthogonal groups of c-root subgroups.

Asymptotic expansions for the Gaussian unitary ensemble

DEFF Research Database (Denmark)

Haagerup, Uffe; Thorbjørnsen, Steen

2012-01-01

Let g : R ¿ C be a C8-function with all derivatives bounded and let trn denote the normalized trace on the n × n matrices. In Ref. 3 Ercolani and McLaughlin established asymptotic expansions of the mean value ¿{trn(g(Xn))} for a rather general class of random matrices Xn, including the Gaussian U...

The Role of Sequence Markers on Reading and Recall: A Comparison of Native and Nonnative English Speakers

Science.gov (United States)

1988-12-15

ORGANIZATION PEPOPT NVBER S; 6a E O c PEPFC=V’NG CPC;% ZA " ON 6o OrFiCE SYMBOL 7a NAME OF MONITORING ORGANZA - ON 0 University of Califor-ia (If appi cable...readers. Experimental Aging Research, 7, 253-268. McLeod, B., & McLaughlin, B. (1986). Restructuring or automatization? Reading in a second language

Distribution and Characterization of Antigens Found in Subcellular Fractions of African Trypanosomes.

Science.gov (United States)

1979-08-01

34 • . . .. . -. 11. (i.e., Trypanosoma cruzi, Pereira et al 1978; Entamoeba histolytica, McLaughlin and Muller in preparation...Partial purification and some properties of a neutral sulfhydryl and an acid proteinase from Entamoeba histolytica. Can. J. Microbiol. 23 420-425...in membrane fragments isolated from Acanthamoeba sp . Biochem. Biophys. Acta 193 203-211. Voorheis, H.P. Gale, J.S., Owen, M.J. and Edwards W. (1979

Ocular Safety of Topical Naltrexone

Science.gov (United States)

2013-04-01

Inhibition of human colon cancer by intermittent opioid receptor blockade with naltrexone. Cancer Letters 1996;101:159-64. 9. McLaughlin PJ, Zagon IS...containing peptides in pancreas and pituitary of genetically obese diabetic (db/db) mice during development of diabetic syndrome. Diabetes 1986;35:1143-51. 48...sore throat; diarrhea; sweating; slowed breathing; fast or pounding heartbeat; constricted pupils; decreased body temperature; mental depression; joint

Harnessing the Power of Collaborative Relationships to Improve National Preparedness and Responsiveness

Science.gov (United States)

2011-09-01

Journal of Qualtiy Improvement, 24: 518–540 McLaughlin, D. and LeCompte, M. (1993). Ethnography and qualitative design in educational research (2nd...METHODOLOGY This thesis uses a combination of the ethnographic research methods and qualitative data analysis including participant observation and...Ethnographic Research Center: http://www.nps.gov/history/ ethnography /aah/AAheritage/ERCf.htm NGB. (2011, March 7). National Guard News. Retrieved July

The Military Spouse Education and Career Opportunities Program: Recommendations for an Internal Monitoring System

Science.gov (United States)

2016-01-01

and are usually described in terms of the size and scope of the services (W.K. Kellogg Foundation, 2004). Output measures indicate whether a...W.K. Kellogg Foundation, 2004; Reed and Jordan; 2007; Jordan, 2010; McLaughlin and Jordan, 2010). In addition to the factors described in the logic...http://www.rand.org/pubs/monographs/MG809.html W. K. Kellogg Foundation, Using Logic Models to Bring Together Planning, Evaluation, and Action: Logic

Research Using In Vivo Simulation of Meta-Organizational Shared Decision Making (SDM). Task 3: Testing the Shared Decision Making Framework in Vivo

Science.gov (United States)

2011-12-01

santé des populations et professeure de psychologie à la faculté des sciences sociales de l’Université d’Ottawa. DRDC CSS CR 2011-32 iii Table...de psychologie , Faculté des sciences sociales | School of Psychology, Faculty of Social Sciences Chaire McLaughlin sur le risque psychosocial | The...Sincerely, Louise Lemyre, Ph.D, MSRC / FRSC École de psychologie / School of Psychology Faculté des sciences sociales / Faculty of Social

Pulmón del soldador de arco

Directory of Open Access Journals (Sweden)

Luciana Molinari

2010-12-01

Full Text Available La siderosis del soldador o neumoconiosis siderótica fue descripta por Doig y McLaughlin en 1936 como una enfermedad pulmonar causada por la inhalación crónica de polvo de hierro en soldadores de arco eléctrico. Presentamos un caso de siderosis del soldador asociada a aumento de los niveles de ferritina, sin hallazgo de depósito de hierro en otros órganos y sin causas evidentes de hemosiderosis secundaria.

Soliton Resolution for the Derivative Nonlinear Schrödinger Equation

Science.gov (United States)

Jenkins, Robert; Liu, Jiaqi; Perry, Peter; Sulem, Catherine

2018-05-01

We study the derivative nonlinear Schrödinger equation for generic initial data in a weighted Sobolev space that can support bright solitons (but exclude spectral singularities). Drawing on previous well-posedness results, we give a full description of the long-time behavior of the solutions in the form of a finite sum of localized solitons and a dispersive component. At leading order and in space-time cones, the solution has the form of a multi-soliton whose parameters are slightly modified from their initial values by soliton-soliton and soliton-radiation interactions. Our analysis provides an explicit expression for the correction dispersive term. We use the nonlinear steepest descent method of Deift and Zhou (Commun Pure Appl Math 56:1029-1077, 2003) revisited by the {\\overline{partial}} -analysis of McLaughlin and Miller (IMRP Int Math Res Pap 48673:1-77, 2006) and Dieng and McLaughlin (Long-time asymptotics for the NLS equation via dbar methods. Preprint, arXiv:0805.2807, 2008), and complemented by the recent work of Borghese et al. (Ann Inst Henri Poincaré Anal Non Linéaire, https://doi.org/10.1016/j.anihpc.2017.08.006, 2017) on soliton resolution for the focusing nonlinear Schrödinger equation. Our results imply that N-soliton solutions of the derivative nonlinear Schrödinger equation are asymptotically stable.

Critical mass experiment using U-235 foils and lucite plates

International Nuclear Information System (INIS)

Sanchez, R.; Butterfield, K.; Kimpland, R.; Jaegers, P.

1998-01-01

The main objective of this experiment was to show how the multiplication of the system increases as moderated material is placed between highly enriched uranium foils. In addition, this experiment served to demonstrate the hand-stacking techniques, and approach to criticality by remote operation. This experiment was designed by Tom McLaughlin in the mid seventies as part of the criticality safety course that is taught at Los Alamos Critical Experiment Facility (LACEF). The W-U-235 ratio for this experiment was 215 which is where the minimum critical mass for this configuration occurs

Critical mass experiment using 235U foils and lucite plates

International Nuclear Information System (INIS)

Sanchez, R.; Butterfield, K.; Kimpland, R.; Jaegers, P.

1998-01-01

This experiment demonstrated how the neutron multiplication of a system increases as moderated material is placed between highly enriched uranium foils. In addition, this experiment served to demonstrate the hand-stacking technique and approach to criticality be remote operation. This experiment was designed by McLaughlin in the mid-seventies as part of the criticality safety course that is taught at the Los Alamos Critical Experiments Facility. The H/ 235 U ratio for this experiment was 215, which is the ratio at which the minimum critical mass for this configuration occurs

Geophysical Characterization of Serpentinite Hosted Hydrogeology at the McLaughlin Natural Reserve, Coast Range Ophiolite

Science.gov (United States)

Ortiz, Estefania; Tominaga, Masako; Cardace, Dawn; Schrenk, Matthew O.; Hoehler, Tori M.; Kubo, Michael D.; Rucker, Dale F.

2018-01-01

Geophysical remote sensing both on land and at sea has emerged as a powerful approach to characterize in situ water-rock interaction processes in time and space. We conducted 2-D Electrical Resistivity Tomography (ERT) surveys to investigate in situ hydrogeological architecture within the Jurassic age tectonic mélange portion of the Coast Range Ophiolite Microbial Observatory (CROMO) during wet and dry seasons, where water-rock interactive processes are thought to facilitate a subsurface biosphere. Integrating survey tracks traversing two previously drilled wells, QV1,1 and CSW1,1 at the CROMO site with wireline and core data, and the Serpentine Valley site, we successfully documented changes in hydrogeologic properties in the CROMO formation, i.e., lateral and vertical distribution of conductive zones and their temporal behavior that are dependent upon seasonal hydrology. Based on the core-log-ERT integration, we propose a hydrogeological architectural model, in which the formation is composed of three distinct aquifer systems: perched serpentinite aquifer without seasonal dependency (shallow system), well-cemented serpentine confining beds with seasonal dependency (intermediate system), serpentinite aquifer (deep system), and the ultramafic basement that acts as a quasi-aquiclude (below the deep system). The stunning contrast between the seasonality in the surface water availability and groundwater storativity in the formation allowed us to locate zones where serpentinite weathering and possibly deeper serpentinization processes might have taken place. We based our findings primarily on lithological composition and the distribution of the conductive formation, our work highlights the link between serpentinite weathering processes and possible sources of water in time and space.

«Julgamento pelos media»: policiamento, ambiente mediático das notícias 24/7 e a «política da indignação»

OpenAIRE

Greer, Chris; McLaughlin, Eugene

2012-01-01

Este artigo analisa a natureza em mudança das relações entre os meios de comunicação social e a chefia da polícia. Com base em estudos prévios (Greer & McLaughlin, 2010), usamos os conceitos de «estrutura inferencial» (Lang & Lang, 1955 e «hierarquia da credibilidade» (Becker, 1967) para analisar o «julgamento pelos media» do antigo comissário do Serviço da Polícia Metropolitana (MPS), Sir Ian Blair. Centramo-nos na reação coletiva e fundamentalmente hostil por parte dos media à declaração de...

Julgamento Pelos Media: Policiamento, Ambiente Mediatico das Noticias 24/7 e a Politica da Indignacao (Portuguese translation of 'Trial By Media: Policing, The 24-7 News Mediasphere, And The Politics Of Outrage')

OpenAIRE

Greer, C.; McLaughlin, E.

2012-01-01

Este artigo analisa a natureza em mudança das relações entre os meios de comunicação social e a chefia da polícia. Com base em estudos prévios (Greer & McLaughlin, 2010), usamos os conceitos de «estrutura inferencial» (Lang & Lang, 1955) e «hierarquia da credibilidade» (Becker, 1967) para analisar o «julgamento pelos media» do antigo comissário do Serviço da Polícia Metropolitana (MPS), Sir Ian Blair. Centramo-nos na reação coletiva e fundamentalmente hostil por parte dos media à declaração d...

A LOW STELLAR OBLIQUITY FOR WASP-47, A COMPACT MULTIPLANET SYSTEM WITH A HOT JUPITER AND AN ULTRA-SHORT PERIOD PLANET

Energy Technology Data Exchange (ETDEWEB)

Sanchis-Ojeda, Roberto; Isaacson, Howard; Marcy, Geoffrey W.; Weiss, Lauren [Department of Astronomy, University of California, Berkeley, CA 94720 (United States); Winn, Joshua N.; Dai, Fei [Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States); Howard, Andrew W.; Sinukoff, Evan [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Petigura, Erik; Rogers, Leslie [Department of Astronomy and Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 (United States); Albrecht, Simon [Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C (Denmark); Hirano, Teruyuki, E-mail: sanchisojeda@berkeley.edu [Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551 (Japan)

2015-10-10

We have detected the Rossiter–Mclaughlin effect during a transit of WASP-47b, the only known hot Jupiter with close planetary companions. By combining our spectroscopic observations with Kepler photometry, we show that the projected stellar obliquity is λ = 0° ± 24°. We can firmly exclude a retrograde orbit for WASP-47b, and rule out strongly misaligned prograde orbits. Low obliquities have also been found for most of the other compact multiplanet systems that have been investigated. The Kepler-56 system, with two close-in gas giants transiting their subgiant host star with an obliquity of at least 45{sup ◦}, remains the only clear counterexample.

The Rossiter-McLaughlin effect for exoplanets

Directory of Open Access Journals (Sweden)

Winn J.N.

2011-02-01

Full Text Available There are now more than 30 stars with transiting planets for which the stellar obliquity—or more precisely its sky projection—has been measured, via the eponymous effect of Rossiter and McLaughlin. The history of these measurements is intriguing. For 8 years a case was gradually building that the orbits of hot Jupiters are always well-aligned with the rotation of their parent stars. Then in a sudden reversal, many misaligned systems were found, and it now seems that even retrograde systems are not uncommon. I review the measurement technique underlying these discoveries, the patterns that have emerged from the data, and the implications for theories of planet formation and migration.

Loominguliste ja uuenduslike ideede rakendamisega seotud pinged / Maureen McLaughlin, Mary Ellen Vogt ; tõlkinud Tiina Nurm

Index Scriptorium Estoniae

McLaughlin, Maureen

2000-01-01

Selleks, et saaks toimuda tulemuslik ja uuenduslik aineõpetus, tuleb teadvustada ja ületada pinged, mis on seotud loovideede rakendamisega. Pingetekitajad, millega õpetajad uuenduslike õpetamis- ja õppimistoimingute rakendamisel võivad kokku puutuda, on järgmised : aeg, ainekavad, tekstid ja muud allikad, oletatav loovuse puudumine, ebakõla uuenduste ja reaalsuse vahel, õpilaste erinevus, tunni organiseerimine ja läbiviimine, hindamine ja hinnangu andmine, õpilaste usaldamine

MODELING THE ROSSITER–MCLAUGHLIN EFFECT: IMPACT OF THE CONVECTIVE CENTER-TO-LIMB VARIATIONS IN THE STELLAR PHOTOSPHERE

Energy Technology Data Exchange (ETDEWEB)

Cegla, H. M.; Watson, C. A. [Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast, University Road, Belfast BT7 1NN (United Kingdom); Oshagh, M.; Figueira, P.; Santos, N. C. [Instituto de Astrofisica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, PT4150-762 Porto (Portugal); Shelyag, S., E-mail: h.cegla@qub.ac.uk [Monash Centre for Astrophysics, School of Mathematical Sciences, Monash University, Clayton, Victoria, 3800 (Australia)

2016-03-01

Observations of the Rossiter–McLaughlin (RM) effect provide information on star–planet alignments, which can inform planetary migration and evolution theories. Here, we go beyond the classical RM modeling and explore the impact of a convective blueshift that varies across the stellar disk and non-Gaussian stellar photospheric profiles. We simulated an aligned hot Jupiter with a four-day orbit about a Sun-like star and injected center-to-limb velocity (and profile shape) variations based on radiative 3D magnetohydrodynamic simulations of solar surface convection. The residuals between our modeling and classical RM modeling were dependent on the intrinsic profile width and v sin i; the amplitude of the residuals increased with increasing v sin i and with decreasing intrinsic profile width. For slowly rotating stars the center-to-limb convective variation dominated the residuals (with amplitudes of 10 s of cm s{sup −1} to ∼1 m s{sup −1}); however, for faster rotating stars the dominant residual signature was due a non-Gaussian intrinsic profile (with amplitudes from 0.5 to 9 m s{sup −1}). When the impact factor was 0, neglecting to account for the convective center-to-limb variation led to an uncertainty in the obliquity of ∼10°–20°, even though the true v sin i was known. Additionally, neglecting to properly model an asymmetric intrinsic profile had a greater impact for more rapidly rotating stars (e.g., v sin i = 6 km s{sup −1}) and caused systematic errors on the order of ∼20° in the measured obliquities. Hence, neglecting the impact of stellar surface convection may bias star–planet alignment measurements and consequently theories on planetary migration and evolution.

Nuclear criticality safety: 3-day training course

International Nuclear Information System (INIS)

Schlesser, J.A.

1993-06-01

The open-quotes 3-Day Training Courseclose quotes is an intensive course in criticality safety consisting of lectures and laboratory sessions, including active student participation in actual critical experiments, a visit to a plutonium processing facility, and in-depth discussions on safety philosophy. The program is directed toward personnel who currently have criticality safety responsibilities in the capacity of supervisory staff and/or line management. This compilation of notes is presented as a source reference for the criticality safety course. It represents the contributions of many people, particularly Tom McLaughlin, the course's primary instructor. It should be noted that when chapters were extracted, an attempt was made to maintain footnotes and references as originally written. Photographs and illustrations are numbered sequentially

J.B. McLachlan: a biography

Energy Technology Data Exchange (ETDEWEB)

Frank, D.

1999-07-01

This social history and biography of James Bryson McLaughlin (1869-1916) describes McLaughlin's leadership as an educator and instigator in organizing Nova Scotia's coal miners during the labour wars in the 1920s. McLaughlin's background and childhood, education, reputation, religion, family life, health, and death are described. Included are descriptions of the life of coal miners in Cape Breton, radical left politics in Canada and the organizers involved, the political economy of the coal industry, child labour, churches, coal markets and prices, company towns and housing, mining disasters and fatalities, elections, First World War efforts, the depression, immigrants, and strikes. The labour organizations, companies, churches, and politicians involved in the struggles for union acceptance are discussed. 872 refs., 7 figs., 24 photos.

Exploring the effects of developing collaboration in a primary science teacher community

DEFF Research Database (Denmark)

Sillasen, Martin Krabbe

2010-01-01

This paper presents findings from a qualitative study to explore factors that may facilitate sustainable changes of collaboration in a primary science teacher community in one school. The context for this study is a development project aimed at improving science teaching by changing teacher......’s collective work in schools and developing network between schools. The objective is to improve the collaboration within primary science teacher communities on sharing best practice and developing new ways of teaching. This study represents an in-depth approach to explore possibilities and constraints for how...... a development project can facilitate sustainable change in primary science teachers’ collaboration. The purpose of the research project introduced here is to examine closer, why many development projects fail to produce sustainable results. The framework of McLaughlin and Talbert (2006) on building teacher...

Locked posterior dislocation of the shoulder: A report of three cases.

Science.gov (United States)

Benhamida, M K; Ouertatani, M; Hasayri, I; Benhassine, A; Meherzi, M; Bouhdiba, S; Mestiri, M

2015-04-01

Posterior shoulder dislocations account for 4% of all shoulder dislocations. In two-thirds of the cases, the diagnosis is made only once the shoulder is locked, which radically changes the treatment and prognosis. We report three clinical cases of locked posterior shoulder dislocation. Closed reduction was attempted in one case but failed. All patients underwent open reduction and subscapularis transfer according to either Neer's (2 cases) or McLaughlin's technique (1 case). The functional outcome was satisfactory in two cases despite recurrent dislocation on the third day after surgery. The third patient eventually developed post-traumatic shoulder osteoarthritis. The best treatment consists of detecting posterior dislocations immediately when they occur under suggestive circumstances (electrocution, epileptic seizure, severe trauma shoulder). Copyright © 2015 Elsevier Masson SAS. All rights reserved.

Accelerated color development of irradiated radiochromic dye films

International Nuclear Information System (INIS)

Chappas, W.J.

1981-01-01

The radiochromic dye films developed by Chalkley and McLaughlin are quickly becoming one of the principal methods for secondary dosimetry. Their useful dose and dose rate ranges, long-term color stability, small and flexible size, and ease of reading make them ideal for spatial dose distribution measurements in the complex targets often encountered in industry. At room temperature, however, their response is slow, requiring several hours after irradiation for full color development. This work examines the effect of humidity on the film's time response and describes a method for accelerating the film's color development. By keeping the film in a controlled humidity environment or through a simple heating technique, the film can be read in minutes instead of hours after irradiation. The results are shown to be identical to those of films stored for 24 hours at room temperature

An unusual new species of paguroid (Crustacea, Anomura, Paguridae) from deep waters of the Gulf of Mexico

Science.gov (United States)

Lemaitre, Rafael; Vázquez-Bader, Ana Rosa; Gracia, Adolfo

2014-01-01

Abstract A new hermit crab species of the family Paguridae, Tomopaguropsis ahkinpechensis sp. n., is described from deep waters (780–827 m) of the Gulf of Mexico. This is the second species of Tomopaguropsis known from the western Atlantic, and the fifth worldwide. The new species is morphologically most similar to a species from Indonesia, Tomopaguropsis crinita McLaughlin, 1997, the two having ocular peduncles that diminish in width distally, reduced corneas, dense cheliped setation, and males lacking paired pleopods 1. The calcified figs on the branchiostegite and anterodorsally on the posterior carapace, and the calcified first pleonal somite that is not fused to the last thoracic somite, are unusual paguroid characters. A discussion of the affinities and characters that define this new species is included, along with a key to all five species of Tomopaguropsis. PMID:25408613

Gamma-Ray Bursts Shower the Universe with Metals

International Nuclear Information System (INIS)

Hazi, A

2006-01-01

According to the results from a Livermore computer model, some of the small change jingling in your pocket contains zinc and copper created in massive gamma-ray bursts (GRBs) that rank as the most impressive light shows in the universe. Livermore astrophysicist Jason Pruet and his colleagues Rebecca Surman and Gail McLaughlin from North Carolina State University (NCSU) reported on their calculations in the February 20, 2004, issue of ''Astrophysical Journal Letters''. They found that GRBs from black holes surrounded by a disk of dense, hot plasma may have contributed heavily to the galactic inventory of elements such as calcium, scandium, titanium, zinc, and copper. ''A typical GRB of this kind briefly outshines all the stars in millions of galaxies combined'', says Pruet. ''Plus it makes about 100 times as much of some common elements as an ordinary supernova''

Temperature and humidity effects on the response of radiochromic dye films

International Nuclear Information System (INIS)

Chappas, W.J.

1981-01-01

The radiochromic dye films developed by Chalkley and McLaughlin are quickly becoming one of the principal methods for secondary dosimetry. Their useful dose and dose rate ranges, long-term color stability, small and flexible size, and ease of reading make them ideal for spatial dose distribution measurements in the complex targets often encountered in research and industry. At room temperature, however, their response is slow, often requiring several hours after irradiation for full color development. This work examines the effect of humidity on the film's time response and describes two methods for accelerating the film's color development. By keeping the film in a controlled humidity environment or through a simple heating technique, the film can be read in minutes instead of hours after irradiation. The results are shown to be identical to those of films stored for 24 hours at room temperature. (author)

Under which conditions does T1 difficulty affect T2 performance in the attentional blink?

DEFF Research Database (Denmark)

Nielsen, Simon; Petersen, Anders; Andersen, Tobias Søren

2009-01-01

When two visual targets (T1 & T2) are presented in rapid succession, performance of T2 suffers up to 900 ms. One theory of this attentional blink (Raymond, Shapiro, & Arnell, 1992) propose that T1 and T2 compete for limited processing resources (Chun & Potter, 1995), and predict that prolonging...... processing time for T1 by increasing its perceptual difficulty will induce a larger blink. Several studies have tested this prediction without reaching a consistent answer. McLaughlin, Shore, & Klein (2001) found no effect of the exposure duration of T1 on the attentional blink. Christmann & Leuthold (2004...... duration. In the hard condition, T1 exposure duration was 10 ms while T1 contrast was adjusted individually to reach 50% correct T1 identification. In the long duration condition, T1 exposure duration was increased to reach approximately 90% correct T1 identification. In the high contrast condition, T1...

Under which conditions does T1 difficulty affect T2 performance in the attentional blink?

DEFF Research Database (Denmark)

Nielsen, Simon; Petersen, Anders; Andersen, Tobias

When two visual targets (T1 & T2) are presented in rapid succession, performance of T2 suffers up to 900 ms. One theory of this attentional blink (Raymond, Shapiro, & Arnell, 1992) propose that T1 and T2 compete for limited processing resources (Chun & Potter, 1995), and predict that prolonging...... processing time for T1 by increasing its perceptual difficulty will induce a larger blink. Several studies have tested this prediction without reaching a consistent answer. McLaughlin, Shore, & Klein (2001) found no effect of the exposure duration of T1 on the attentional blink. Christmann & Leuthold (2004...... duration. In the hard condition, T1 exposure duration was 10 ms while T1 contrast was adjusted individually to reach 50% correct T1 identification. In the long duration condition, T1 exposure duration was increased to reach approximately 90% correct T1 identification. In the high contrast condition, T1...

X-Ray Absorption in Carbon Ions Near the K-Edge

Science.gov (United States)

Hasoglu, M. F.; Abdel-Naby, Sh. A.; Nikolic, D.; Gorczyca, T. W.; McLaughlin, B. M.

2007-06-01

K-shell photoabsorption calculations are important for determining the elemental abundances of the interstellar medium (ISM) from observed X-ray absorption spectra. Previously, we performed reliable K-shell photoabsorption calculations for oxygen [1-3] and neon [4,5] ions. We have executed detailed R-matrix calculations for carbon ions, including Auger broadening, by using an optical potential, and relaxation effects, by using pseudoorbitals with the necessary pseudoresonance elimination. This work was funded by NASA's Astronomy Physics Research and Analysis (APRA) and Solar and Heliospheric Physics (SHP) Supporting Research and Technology (SR&T) programs. References: [1] T. W. Gorczyca and B. M. McLaughlin. J Phys. B. 33 L859 (2000) [2] A. M. Juett, et al., Astrophys. J. 612, 308 (2004) [3] J. Garcia et al., Astrophys. J. Supp. S. 158, 68 (2005) [4] T. W. Gorczyca., Phys. Rev. A. 61, 024702 (2000) [5] A. M. Juett, et al., Astrophys. J. 648, 1066 (2006)

An Ethnographic Study of Chinese Heritage Language Education and Technological Innovations

Directory of Open Access Journals (Sweden)

Minjuan Wang

2004-01-01

Full Text Available Research has increasingly uncovered the cognitive, cultural, and economic advantages of bilingualism and the positive impact of heritage language on children's second language acquisition (M:cLaughlin, 1995. As one type of heritage language education organizations, Chinese language schools have been in existence for decades in the U.S., but their practices have remained informal and not readily accessible to people from other cultures. In order to bridge this gap, this ethnographic study illustrates family and community involvement in promoting language proficiency in heritage language populations and explores language education methods practiced in Chinese community language schools in an urban Southern California area. The study examines the intricate issues affecting heritage language learning and explores the potential uses of technology in assisting young learners in acquiring their heritage language (Chinese. In addition, the study generates guidelines for adapting existing technology-assisted language programs (e.g., the Chinese Cultural Crystals for instructional uses.

A comparative evaluation of accuracy of Mclaughlin Bennet Trevisi prescription of six commercially available orthodontic metal brackets: An in vitro study

Directory of Open Access Journals (Sweden)

Prateek Navratan Daga

2017-01-01

Full Text Available Introduction: While using preadjusted edgewise mechanics, tooth positioning relies on the accuracy of bracket prescription for correct expression of tip and torque when using full-size archwire, thus making accuracy of bracket prescription vital in its overall performance. This study aimed to investigate the precision offered in bracket prescription: slot dimensions, tip, and torque values. Materials and Methods: MBT prescriptions of upper left central incisor brackets manufactured by six different commercial houses were evaluated to assess the aforementioned accuracy of bracket slot dimensions as well as tip and torque values. Rapid-I Precision Measuring System was used to accurately determine slot dimensions as well as tip and torque values. Results: Results obtained in a descending order of accuracy were as follows: American Orthodontics, Ortho Organizers, 3M Unitek, Forestadent, Modern Orthodontics and JJ Orthodontics. The obtained results were evaluated statistically using one-way ANOVA test. P< 0.05 was considered statistically significant. Conclusion: This study helps us to note the accuracy level of the inherent prescription values offered in various commercial houses and the likely effect the same may have on our expectation of a prescription finish while using attachments from any of them.

Application of natural analog studies to exploration for ore deposits

International Nuclear Information System (INIS)

Gustafson, D.L.

1995-01-01

Natural analogs are viewed as similarities in nature and are routinely utilized by exploration geologists in their search for economic mineral deposits. Ore deposit modeling is undertaken by geologists to direct their exploration activities toward favorable geologic environments and, therefore, successful programs. Two types of modeling are presented: (i) empirical model development based on the study of known ore deposit characteristics, and (ii) concept model development based on theoretical considerations and field observations that suggest a new deposit type, not known to exist in nature, may exist and justifies an exploration program. Key elements that are important in empirical model development are described, and examples of successful applications of these natural analogs to exploration are presented. A classical example of successful concept model development, the discovery of the McLaughlin gold mine in California, is presented. The utilization of natural analogs is an important facet of mineral exploration. Natural analogs guide explorationists in their search for new discoveries, increase the probability of success, and may decrease overall exploration expenditure

Experiences of Visually Impaired Students in Community College Math Courses

Science.gov (United States)

Swan, S. Tomeka

Blind and visually impaired students who attend community colleges face challenges in learning mathematics (Forrest, 2010). Scoy, McLaughlin, Walls, and Zuppuhaur (2006) claim these students are at a disadvantage in studying mathematics due to the visual and interactive nature of the subject, and by the way mathematics is taught. In this qualitative study six blind and visually impaired students attended three community colleges in one Mid-Atlantic state. They shared their experiences inside the mathematics classroom. Five of the students were enrolled in developmental level math, and one student was enrolled in college level math. The conceptual framework used to explore how blind and visually impaired students persist and succeed in math courses was Piaget's theory on constructivism. The data from this qualitative study was obtained through personal interviews. Based on the findings of this study, blind and visually impaired students need the following accommodations in order to succeed in community college math courses: Accommodating instructors who help to keep blind and visually impaired students motivated and facilitate their academic progress towards math completion, tutorial support, assistive technology, and a positive and inclusive learning environment.

X-Ray Photoabsorption in Magnesium Ions

Science.gov (United States)

Abdel-Naby, Sh. A.; Hasoglu, M. F.; Nicolić, D.; Gorczyca, T. W.

2009-05-01

K-shell photoabsorption cross sections are necessary for determining elemental abundances of the interstellar medium (ISM) from observed X-ray spectra. Over the past few years, our group has computed reliable K-shell photoabsorption calculations for oxygen [1-3], neon [4,5], and carbon [6] ions. We extend our calculations to magnesium ions using a state-of-the-art R-matrix method that incorporates the important Auger broadening and pseudoresonanace-elimination effects. Comparisons with available independent-particle (IP) results and other available data will also be presented. This work was supported in part by NASA's Astronomy Physics Research and Analysis (APRA) and Solar and Heliospheric Physics (SHP) Supporting Research and Technology (SR&T) programs. [1] T. W. Gorczyca and B. M. McLaughlin. J Phys. B. 33, L859 (2000). [2] A. M. Juett, et al., Astrophys. J. 612, 308 (2004). [3] J. Garcia et al, Astrophys. J. Supp. S. 158, 68 (2005). [4] T. W. Gorczyca., Phys. Rev. A. 61, 024702 (2000). [5] A. M. Juett, et al, Astrophys. J. 648, 1066 (2006). [6] M. F. Hasoglu, et al, Astrophys. J., (in preparation)

Screening-Constant-by-Unit-Nuclear-Charge method investigations of high lying (1D2,1S0) ns, nd Rydberg series in the photoionization spectra of the halogen-like ion Kr+

Science.gov (United States)

Sakho, I.

2014-01-01

Energy positions and quantum defects of the 4s24p4 (1D2,1S0) ns, nd Rydberg series originating from the 4s24p52P3/2∘ ground state and from the 4s24p52P1/2∘ metastable state of Kr+ are reported. Calculations are performed using the Screening Constant by Unit Nuclear Charge (SCUNC) method. The results obtained are in suitable agreement with recent experimental data from the combined ASTRID merged-beam set up and Fourier Transform Ion Cyclotron Resonance device (Bizau et al., 2011), ALS measurements (Hinojosa et al., 2012), and multi-channel R-matrix eigenphase derivative calculations (McLaughlin and Balance, 2012). In addition, analysis of the 4s24p4(1D2)nd and the 4s24p4(1S0)nd resonances is given via the SCUNC procedure. The excellent results obtained from our work point out that the SCUNC formalism may be used to confirm the results of the analysis from the standard quantum-defect expansion formulas. Eventual errors occurring in the analysis can then be automatically detected and corrected via the SCUNC procedure.

A comprehensive approach to long-standing facial paralysis based on lengthening temporalis myoplasty.

Science.gov (United States)

Labbè, D; Bussu, F; Iodice, A

2012-06-01

Long-standing peripheral monolateral facial paralysis in the adult has challenged otolaryngologists, neurologists and plastic surgeons for centuries. Notwithstanding, the ultimate goal of normality of the paralyzed hemi-face with symmetry at rest, and the achievement of a spontaneous symmetrical smile with corneal protection, has not been fully reached. At the beginning of the 20(th) century, the main options were neural reconstructions including accessory to facial nerve transfer and hypoglossal to facial nerve crossover. In the first half of the 20(th) century, various techniques for static correction with autologous temporalis muscle and fascia grafts were proposed as the techniques of Gillies (1934) and McLaughlin (1949). Cross-facial nerve grafts have been performed since the beginning of the 1970s often with the attempt to transplant free-muscle to restore active movements. However, these transplants were non-vascularized, and further evaluations revealed central fibrosis and minimal return of function. A major step was taken in the second half of the 1970s, with the introduction of microneurovascular muscle transfer in facial reanimation, which, often combined in two steps with a cross-facial nerve graft, has become the most popular option for the comprehensive treatment of long-standing facial paralysis. In the second half of the 1990s in France, a regional muscle transfer technique with the definite advantages of being one-step, technically easier and relatively fast, namely lengthening temporalis myoplasty, acquired popularity and consensus among surgeons treating facial paralysis. A total of 111 patients with facial paralysis were treated in Caen between 1997 and 2005 by a single surgeon who developed 2 variants of the technique (V1, V2), each with its advantages and disadvantages, but both based on the same anatomo-functional background and aim, which is transfer of the temporalis muscle tendon on the coronoid process to the lips. For a comprehensive

Science.gov (United States)

LABBÈ, D.; BUSSU, F.; IODICE, A.

2012-01-01

SUMMARY Long-standing peripheral monolateral facial paralysis in the adult has challenged otolaryngologists, neurologists and plastic surgeons for centuries. Notwithstanding, the ultimate goal of normality of the paralyzed hemi-face with symmetry at rest, and the achievement of a spontaneous symmetrical smile with corneal protection, has not been fully reached. At the beginning of the 20th century, the main options were neural reconstructions including accessory to facial nerve transfer and hypoglossal to facial nerve crossover. In the first half of the 20th century, various techniques for static correction with autologous temporalis muscle and fascia grafts were proposed as the techniques of Gillies (1934) and McLaughlin (1949). Cross-facial nerve grafts have been performed since the beginning of the 1970s often with the attempt to transplant free-muscle to restore active movements. However, these transplants were non-vascularized, and further evaluations revealed central fibrosis and minimal return of function. A major step was taken in the second half of the 1970s, with the introduction of microneurovascular muscle transfer in facial reanimation, which, often combined in two steps with a cross-facial nerve graft, has become the most popular option for the comprehensive treatment of long-standing facial paralysis. In the second half of the 1990s in France, a regional muscle transfer technique with the definite advantages of being one-step, technically easier and relatively fast, namely lengthening temporalis myoplasty, acquired popularity and consensus among surgeons treating facial paralysis. A total of 111 patients with facial paralysis were treated in Caen between 1997 and 2005 by a single surgeon who developed 2 variants of the technique (V1, V2), each with its advantages and disadvantages, but both based on the same anatomo-functional background and aim, which is transfer of the temporalis muscle tendon on the coronoid process to the lips. For a

Industry careers for the biomedical engineer.

Science.gov (United States)

Munzner, Robert F

2004-01-01

This year's conference theme is "linkages for innovation in biomedicine." Biomedical engineers, especially those transitioning their career from academic study into medical device industry, will play a critical role in converting the fruits of scientific research into the reality of modern medical devices. This special session is organized to help biomedical engineers to achieve their career goals more effectively. Participants will have opportunities to hear from and interact with leading industrial experts on many issues. These may include but not limited to 1) career paths for biomedical engineers (industrial, academic, or federal; technical vs. managerial track; small start-up or large established companies); 2) unique design challenges and regulatory requirements in medical device development; 3) aspects of a successful biomedical engineering job candidate (such as resume, interview, follow-up). Suggestions for other topics are welcome and should be directed to xkong@ieee.org The distinguished panelists include: Xuan Kong, Ph.D., VP of Research, NEUROMetrix Inc, Waltham, MA Robert F. Munzner, Ph.D., Medical Device Consultant, Doctor Device, Herndon, VA Glen McLaughlin, Ph.D., VP of Engineering and CTO, Zonare Medical System Inc., Mountain View, CA Grace Bartoo, Ph.D., RAC, General Manager, Decus Biomedical LLC San Carlos, CA.

Screening-Constant-by-Unit-Nuclear-Charge method investigations of high lying (1D2,1S0) ns, nd Rydberg series in the photoionization spectra of the halogen-like ion Kr+

International Nuclear Information System (INIS)

Sakho, I.

2014-01-01

Energy positions and quantum defects of the 4s 2 4p 4 ( 1 D 2 , 1 S 0 ) ns, nd Rydberg series originating from the 4s 2 4p 52 P 3/2 ∘ ground state and from the 4s 2 4p 52 P 1/2 ∘ metastable state of Kr + are reported. Calculations are performed using the Screening Constant by Unit Nuclear Charge (SCUNC) method. The results obtained are in suitable agreement with recent experimental data from the combined ASTRID merged-beam set up and Fourier Transform Ion Cyclotron Resonance device (Bizau et al., 2011), ALS measurements (Hinojosa et al., 2012), and multi-channel R-matrix eigenphase derivative calculations (McLaughlin and Balance, 2012). In addition, analysis of the 4s 2 4p 4 ( 1 D 2 )nd and the 4s 2 4p 4 ( 1 S 0 )nd resonances is given via the SCUNC procedure. The excellent results obtained from our work point out that the SCUNC formalism may be used to confirm the results of the analysis from the standard quantum-defect expansion formulas. Eventual errors occurring in the analysis can then be automatically detected and corrected via the SCUNC procedure

Redox calcination study of Synroc D powder containing simulated SRL waste

International Nuclear Information System (INIS)

Chen, C.

1982-01-01

According to Ringwood [A.E. Ringwood, W. Sinclair, and G.M. McLaughlin, Nuclear Waste Immobilization, Lawrence Livermore Laboratory, Livermore, Rept. UCRL-15147 (1979)], the iron oxidation state is important in controlling, the spinel mineralogy and composition if the amount of titania (TiO 2 ) consumed in spinel formation is to be minimized in favor of the formation of the Synroc phases, zirconolite, perovskite, and nepheline. In our redox calcination studies we observed that the iron oxidation state of FeO/Fe 2 O 3 can be controlled by the redoxcalcining atmosphere. In a CO atmosphere, the oxidation state was reduced to less than 7 wt % Fe 2 O 3 . With appropriate CO 2 /CO gas mixtures the resultant iron oxidation states were in the range of 45 to 59 wt % Fe 2 O 3 . Direct rotary redox calcination of spray dried powder at 600 0 C, without prior air calcination, showed increased redox efficiency when compared to powder that had been previously air calcined at 650 0 C. We believe this is caused by a reduction in particle size. Rotary calcination at 800 0 C in argon has no measurable reduction affect on the iron oxidation state of Synroc D powder

Screening-Constant-by-Unit-Nuclear-Charge method investigations of high lying ({sup 1}D{sub 2},{sup 1}S{sub 0}) ns, nd Rydberg series in the photoionization spectra of the halogen-like ion Kr{sup +}

Energy Technology Data Exchange (ETDEWEB)

Sakho, I., E-mail: aminafatima_sakho@yahoo.fr

2014-01-15

Energy positions and quantum defects of the 4s{sup 2}4p{sup 4} ({sup 1}D{sub 2},{sup 1}S{sub 0}) ns, nd Rydberg series originating from the 4s{sup 2}4p{sup 52}P{sub 3/2}{sup ∘} ground state and from the 4s{sup 2}4p{sup 52}P{sub 1/2}{sup ∘} metastable state of Kr{sup +} are reported. Calculations are performed using the Screening Constant by Unit Nuclear Charge (SCUNC) method. The results obtained are in suitable agreement with recent experimental data from the combined ASTRID merged-beam set up and Fourier Transform Ion Cyclotron Resonance device (Bizau et al., 2011), ALS measurements (Hinojosa et al., 2012), and multi-channel R-matrix eigenphase derivative calculations (McLaughlin and Balance, 2012). In addition, analysis of the 4s{sup 2}4p{sup 4}({sup 1}D{sub 2})nd and the 4s{sup 2}4p{sup 4}({sup 1}S{sub 0})nd resonances is given via the SCUNC procedure. The excellent results obtained from our work point out that the SCUNC formalism may be used to confirm the results of the analysis from the standard quantum-defect expansion formulas. Eventual errors occurring in the analysis can then be automatically detected and corrected via the SCUNC procedure.

Improving Hearing Aid Self-Efficacy and Utility Through Revising a Hearing Aid User Guide: A Pilot Study.

Science.gov (United States)

McMullan, Alexandra; Kelly-Campbell, Rebecca J; Wise, Kim

2018-03-08

This pilot study aimed to investigate whether revising a hearing aid user guide (HAUG) is associated with improved hearing aid self-efficacy and utility performance. In Part 1, an HAUG was evaluated using the Suitability Assessment of Material (SAM) and readability formulas (Flesch Reading Ease [Flesch, 1943], Flesch-Kincaid Readability Formula [Kincaid, Fishburne, Rogers, & Chissom, 1957], and Simple Measure of Gobbledygook [McLaughlin, 1969]). The HAUG was revised using results from the SAM and best practice guidelines. The revision included generating a video. In Part 2, 30 adults with hearing impairment were randomly assigned to use either the original guide (N = 15) or the revised guide and video (N = 15) to perform a utility task. Participants' self-efficacy was measured using the Basic and Advanced Handling subscales of the Measure of Audiologic Rehabilitation Self-Efficacy for Hearing Aids questionnaire. SAM and readability were compared between the original and revised guides (Doak, Doak, & Root, 1996). SAM and readability were improved following the revision. Participants in the revised guide group performed significantly better on the utility task and on the Measure of Audiologic Rehabilitation Self-Efficacy for Hearing Aids subscales than participants in the original guide group. These results are encouraging as they indicate that there is scope to influence self-efficacy and utility performance through the use of appropriate HAUGs.

A half-century ago physicists missed a major public service opportunity, costing the human race widespread chronic illness and many deaths!

Science.gov (United States)

Lundquist, Marjorie

2005-03-01

Radar-pulsed microwave (MW) radiation-helped the Allies win World War II but health concerns soon arose. Alerted to a syndrome resembling mild radiation poisoning,^1 a worried M.D. surveyed radar-exposed workers, finding a high incidence of internal bleeding, 2 leukemia cases in 600 radar operators, 2 brain tumor cases in a 5-man MW research team and many complaints of headache. He sent his report^2 to the Pentagon in 1953. Alarmed Navy officers convened a meeting^3 [mostly of electrical engineers (EEs)] to identify a safe level of MW exposure for servicemen. Biophysicist Herman Schwan attended, playing a major role in establishing 10 mW/cm^2 as a thermally safe MW exposure limit. The IEEE became sole sponsor of ANSI C95 [an early health standard for radiofrequency (RF) exposure] with negative long-term consequences for human health! I review RF health standards development since 1953, comparing what physicists might have done, had they-not EEs-had this responsibility! [See also my technical abstract.] ^1 N.H. Steneck, The Microwave Debate, Cambridge, MA: MIT Press, 1984; p. 33. ^2 J.T. McLaughlin, A Study of Possible Health Hazards from Exposure to Microwave Radiation (Hughes Aircraft, Culver City CA, Feb. 9, 1953). ^3 Biological Effects of Microwaves, meeting minutes (Navy Dept. Conference, Naval Medical Research Institute, Bethesda MD, Apr. 29, 1953).

Characterization of a new photo-fluorescent film dosimeter for high-radiation dose applications

International Nuclear Information System (INIS)

Murphy, Mark K.; Miller, Steven D.; Kovacs, Andras; Mclaughlin, William L.; Slezsak, Istvan

2001-01-01

Characterization studies on one of the first versions of the Sunna fluorescent dosimeter have been published by Kovacs and McLaughlin. This present study describes testing results of a newer version of the dosimeter (Model and 61543;, batch 0399-20). This dosimeter is a 1-cm by 3-cm polymeric film of 0.5 mm thickness that emits a green fluorescence component at intensities almost linear with dose. The manufacturing method (injection molding) allows potential batch sizes on the order of a million while maintaining a signal precision on the order of+/- 1%. Studies include dose response, dose rate dependence, energy dependence, post-irradiation stability, environmental effects, and variation of response within a batch. Data for both food irradiation and sterilization dose levels were obtained. The results indicate that the green signal (0.3-200 kGy) works well for food irradiation dose levels, especially in refrigerated facilities that maintain tight temperature control. The green signal also works well in sterilization facilities because its irradiation temperature coefficient above room temperature is minimal at sterilization doses. If the user requires readout results in less than 22 hours after room temperature irradiation, the user can either calibrate for a specific post-irradiation readout time(s) or simply heat the dosimeters in a small laboratory oven to quickly stabilize the signal

Characterization of a new photo-fluorescent film dosimeter for high-radiation dose applications

International Nuclear Information System (INIS)

Murphy, M.K.; Miller, S.D.; Kovacs, A.; McLaughlin, W.L.; Slezsak, I.

2002-01-01

Characterization studies on one of the first versions of the Sunna fluorescent dosimeter TM have been published by Kovacs and McLaughlin. This present study describes testing results of a newer version of the dosimeter (Model γ, batch 0399-20). This dosimeter is a 1-cmx3-cm polymeric film of 0.5 mm thickness that emits a green fluorescence component at intensities almost linear with dose. The manufacturing method (injection molding) allows potential batch sizes on the order of a million while maintaining a signal precision on the order of ±1%. Studies include dose response, dose rate dependence, energy dependence, post-irradiation stability, environmental effects, and variation of response within a batch. Data for both food irradiation and sterilization dose levels were obtained. The results indicate that the green signal (0.3-250 kGy) works well for food irradiation dose levels, especially in refrigerated facilities that maintain tight temperature control. The green signal also works well in sterilization facilities because its irradiation temperature coefficient above room temperature is minimal at sterilization doses. If the user requires readout results in <22 h after room temperature irradiation, the user can either calibrate for a specific post-irradiation readout time(s) or simply heat the dosimeters in a small laboratory oven to quickly stabilize the signal

A Life of Their Own: Women’s Mid-life Quest in Contemporary Irish Women’s Short Stories

Directory of Open Access Journals (Sweden)

Ann Wan-lih Chang

2016-03-01

Full Text Available This essay focuses on the motif of quest, as initiated by older or middle-aged women and depicted in stories by Clare Boylan, Éilís Ní Dhuibhne, Stella Mahon, Mary Dorcey and Marilyn McLaughlin in the 1980s and 90s. Throughout the western literary canon the quest motif recurs in myths, legends or genres such as rite-of-passage novels, in which a hero (seldom a heroine is encouraged to prove his own value through a series of tests. Within this tradition, a woman’s quest is usually one involving a process which shapes her into the contemporary norms of social conformity – essentially losing or sublimating the self rather than developing or expressing the potential of the self. Notwithstanding the traditional depictions of a female quest in which loss and self-sacrifice are characteristic, representations of Irish women in the stories explored in this essay demonstrate heroines whose quest leads them to a kind of awakening and enlightenment. The heroine in Irish women’s stories engages in subversion of the social norm as part of an attempt to reconcile with residual trauma from the past, or with inner conflicts which have left her feeling alienated from accepted social conventions and expectations in respect of women. Irish female writers illustrate through their narrative a latent power to challenge and to subvert the traditionally accepted and dominant patriarchal ideology of Irish society.

One-carbon (bio ?) Geochemistry in Subsurface Waters of the Serpentinizing Coast Range Ophiolite

Science.gov (United States)

Hoehler, Tori M.; Mccollom, Tom; Schrenk, Matt; Cardace, Dawn

2011-01-01

Serpentinization - the aqueous alteration of ultramafic rocks - typically imparts a highly reducing and alkaline character to the reacting fluids. In turn, these can influence the speciation and potential for metabolism of one-carbon compounds in the system. We examined the aqueous geochemistry and assessed the biological potential of one-carbon compounds in the subsurface of the McLaughlin Natural Reserve (Coast Range Ophiolite, California, USA). Fluids from wells sunk at depths of 25-90 meters have pH values ranging from 9.7 to 11.5 and dissolved inorganic carbon (DIC concentrations) generally below 60 micromolar. Methane is present at concentrations up to 1.3 millimolar (approximately one-atmosphere saturation), and hydrogen concentrations are below 15 nanomolar, suggesting active consumption of H2 and production of CH4. However, methane production from CO2 is thermodynamically unfavorable under these conditions. Additionally, the speciation of DIC predominantly into carbonate at these high pH values creates a problem of carbon availability for any organisms that require CO2 (or bicarbonate) for catabolism or anabolism. A potential alternative is carbon monoxide, which is present in these waters at concentrations 2000-fold higher than equilibrium with atmospheric CO. CO is utilized in a variety of metabolisms, including methanogenesis, and bioavailability is not adversely affected by pH-dependent speciation (as for DIC). Methanogenesis from CO under in situ conditions is thermodynamically favorable and would satisfy biological energy requirements with respect to both Gibbs Energy yield and power.

Using a home blood pressure monitor: do accompanying instructional materials meet low literacy guidelines?

Science.gov (United States)

Wallace, Lorraine S; Keenum, Amy J

2008-08-01

To evaluate the readability and related features of English language Quick Reference Guides (QRGs) and User Manuals (UMs) accompanying home blood pressure monitors (HBPMs). We evaluated QRGs and UMs for 22 HBPMs [arm (n=12); wrist (n=10)]. Using established criteria, we evaluated reading grade level, language availability, dimensions, text point size, use of illustrations, layout/formatting characteristics, and emphasis of key points of English-language patient instructions accompanying HBPMs. Readability was calculated using McLaughlin's Simplified Measure of Gobbledygoop. Items from the Suitability of Materials Assessment and User-Friendliness Tool were used to assess various layout features. Simplified Measure of Gobbledygoop scores of both QRGs (mean+/-SD=9.1+/-0.8) and UMs (9.3+/-0.8) ranged from 8th to 10th grade. QRGs and UMs presented steps in chronological order, used active voice throughout, avoided use of specialty fonts, focused on need to know, and used realistic illustrations. Seven sets of instructions included all seven key points related to proper HPBM use, whereas three sets of instructions included less than or equal to three key points (mean=4.8+/-1.9). Although most QRGs and UMs met at least some recommended low-literacy formatting guidelines, all instructional materials should be developed and tested to meet the needs of the patient population at large. Key points related to proper HBPM use should not only be included within these instructions, but highlighted to emphasize their importance.

Current concepts review: Fractures of the patella

Science.gov (United States)

Gwinner, Clemens; Märdian, Sven; Schwabe, Philipp; Schaser, Klaus-D.; Krapohl, Björn Dirk; Jung, Tobias M.

2016-01-01

Fractures of the patella account for about 1% of all skeletal injuries and can lead to profound impairment due to its crucial function in the extensor mechanism of the knee. Diagnosis is based on the injury mechanism, physical examination and radiological findings. While the clinical diagnosis is often distinct, there are numerous treatment options available. The type of treatment as well as the optimum timing of surgical intervention depends on the underlying fracture type, the associated soft tissue damage, patient factors (i.e. age, bone quality, activity level and compliance) and the stability of the extensor mechanism. Regardless of the treatment method an early rehabilitation is recommended in order to avoid contractures of the knee joint capsule and cartilage degeneration. For non-displaced and dislocated non-comminuted transverse patellar fractures (2-part) modified anterior tension band wiring is the treatment of choice and can be combined – due to its biomechanical superiority – with cannulated screw fixation. In severe comminuted fractures, open reduction and fixation with small fragment screws or new angular stable plates for anatomic restoration of the retropatellar surface and extension mechanism results in best outcome. Additional circular cerclage wiring using either typical metal cerclage wires or resorbable PDS/non-resorbable FiberWires increases fixation stability and decreases risk for re-dislocation. Distal avulsion fractures should be fixed with small fragment screws and should be protected by a transtibial McLaughlin cerclage. Partial or complete patellectomy should be regarded only as a very rare salvage operation due to its severe functional impairment. PMID:26816667

Evaluation of Biochemical Changes in Experimental Animals Treated with Some Anticancer and Radiosynthetizers

International Nuclear Information System (INIS)

EL-Shawy, O.E.M.

2009-01-01

Cancer constitutes the largest cause of mortality in the world and claims over 6 million lives every year (Abdullaev et al. 2000).It is a disease in which cellular growth regulatory networks are disrupted(Chen et al.2003). An extremely promising strategy for cancer prevention today is chemo prevention, which is defined as the use of synthetic or natural agents (alone or in combination) to block the development of cancer in humans (Gupta et al. 2004). Most of anticancer drugs have side effects on human normal cells when they were used to treat tumor cells (Bi and Jiang ,2006).Therefore cancer drugs development has moved from conventional cytotoxic chemotherapeutics to a more mechanism-based targeted approach towards the common goal of tumor growth arrest (McLaughlin and La Thangue 2004). Histones are a family of nuclear proteins that interact with DNA, resulting in DNA being wrapped around a core of histone octamer within the nucleosome (Rasheed et al. 2008).They may act through the transcriptional reactivation of dormant tumor suppressor genes and they also modulate expression of several other genes related to cell cycle, apoptosis, and angiogenesis (Shankar ans Srivastava, 2008). Histone acetylation is a reversible process: histone acetyl transferases (HAT) transfer the acetyl moiety from acetyl coenzyme A to the lysine, and histone de acetylases (HDAC) remove the acetyl groups reestablishing the positive charge in the histones (Fang, 2005).In particular, imbalance in histone acetylation can lead to changes in chromatin structure and transcriptional dysregulation of genes that are involved in the control of proliferation, cell-cycle progression, differentiation and/or apoptosis

A novel germ cell protein, SPIF (sperm PKA interacting factor), is essential for the formation of a PKA/TCP11 complex that undergoes conformational and phosphorylation changes upon capacitation.

Science.gov (United States)

Stanger, Simone J; Law, Estelle A; Jamsai, Duangporn; O'Bryan, Moira K; Nixon, Brett; McLaughlin, Eileen A; Aitken, R John; Roman, Shaun D

2016-08-01

Spermatozoa require the process of capacitation to enable them to fertilize an egg. PKA is crucial to capacitation and the development of hyperactivated motility. Sperm PKA is activated by cAMP generated by the germ cell-enriched adenylyl cyclase encoded by Adcy10 Male mice lacking Adcy10 are sterile, because their spermatozoa are immotile. The current study was designed to identify binding partners of the sperm-specific (Cα2) catalytic subunit of PKA (PRKACA) by using it as the "bait" in a yeast 2-hybrid system. This approach was used to identify a novel germ cell-enriched protein, sperm PKA interacting factor (SPIF), in 25% of the positive clones. Homozygous Spif-null mice were embryonically lethal. SPIF was coexpressed and coregulated with PRKACA and with t-complex protein (TCP)-11, a protein associated with PKA signaling. We established that these 3 proteins form part of a novel complex in mouse spermatozoa. Upon capacitation, the SPIF protein becomes tyrosine phosphorylated in >95% of sperm. An apparent molecular rearrangement in the complex occurs, bringing PRKACA and TCP11 into proximity. Taken together, these results suggest a role for the novel complex of SPIF, PRKACA, and TCP11 during sperm capacitation, fertilization, and embryogenesis.-Stanger, S. J., Law, E. A., Jamsai, D., O'Bryan, M. K., Nixon, B., McLaughlin, E. A., Aitken, R. J., Roman, S. D. A novel germ cell protein, SPIF (sperm PKA interacting factor), is essential for the formation of a PKA/TCP11 complex that undergoes conformational and phosphorylation changes upon capacitation. © FASEB.

Management of Multi-Casualty Incidents in Mountain Rescue: Evidence-Based Guidelines of the International Commission for Mountain Emergency Medicine (ICAR MEDCOM).

Science.gov (United States)

Blancher, Marc; Albasini, François; Elsensohn, Fidel; Zafren, Ken; Hölzl, Natalie; McLaughlin, Kyle; Wheeler, Albert R; Roy, Steven; Brugger, Hermann; Greene, Mike; Paal, Peter

2018-02-15

Blancher, Marc, François Albasini, Fidel Elsensohn, Ken Zafren, Natalie Hölzl, Kyle McLaughlin, Albert R. Wheeler III, Steven Roy, Hermann Brugger, Mike Greene, and Peter Paal. Management of multi-casualty incidents in mountain rescue. High Alt Med Biol. 00:000-000, 2018. Multi-Casualty Incidents (MCI) occur in mountain areas. Little is known about the incidence and character of such events, and the kind of rescue response. Therefore, the International Commission for Mountain Emergency Medicine (ICAR MEDCOM) set out to provide recommendations for the management of MCI in mountain areas. Details of MCI occurring in mountain areas related to mountaineering activities and involving organized mountain rescue were collected. A literature search using (1) PubMed, (2) national mountain rescue registries, and (3) lay press articles on the internet was performed. The results were analyzed with respect to specific aspects of mountain rescue. We identified 198 MCIs that have occurred in mountain areas since 1956: 137 avalanches, 38 ski lift accidents, and 23 other events, including lightning injuries, landslides, volcanic eruptions, lost groups of people, and water-related accidents. General knowledge on MCI management is required. Due to specific aspects of triage and management, the approach to MCIs may differ between those in mountain areas and those in urban settings. Mountain rescue teams should be prepared to manage MCIs. Knowledge should be reviewed and training performed regularly. Cooperation between terrestrial rescue services, avalanche safety authorities, and helicopter crews is critical to successful management of MCIs in mountain areas.

Bioensayo General de Letalidad en Artemia Salina, a Las Fracciones del Extracto Etanólico De Psidium Guajava. L y Psidium Guineense. Sw

Directory of Open Access Journals (Sweden)

Lizbeth Sánchez

2005-10-01

Full Text Available El estudio se centró en la evaluación y verificación de la letalidad de las fracciones acetato de etilo, obtenida de los extractos etanólicos de los frutos en estado de madurez, verde y pintón, utilizando la cáscara y pulpa de las especies guayaba (Psidium guajava L y Choba (Psidium guineense Sw. La valoración se llevó a cabo mediante el bioensayo en Artemia salina, a través del cual, se evidencia el siguiente proceso: determinar la concentración letal 50 (CL50 utilizando el medio artificial a Ph 7-8, burbujear con el fin de saturar de oxígeno la solución, controlar la eclosión de los huevos a 25 °C despuésde 48 horas, preparar la solución madre y las de trabajo a concentraciones de 1500, 1000, 500,100, 10 g/ml, control positivo estricnina a 80, 70, 60, 50 g/ml, blanco solvente etanol a 80 g/ml. El ensayo biológico se realizó siguiendo las metodologías propuestas por Gualdrón, R (1994; Cyted (1995;Martínez, C (1999 y McLaughlin, J (1997. Comprobada la letalidad de las fracciones acetato del extracto etanólico de Psidium guajava. L y Psidium guineense. Sw mostró CL50 de 181.4 y 221.30g/ml respectivamente, los resultados se evaluaron según Gautret (2000.

Radiochromic film dosimetry

International Nuclear Information System (INIS)

Soares, Christopher G.

2006-01-01

The object of this paper is to give a new user some practical information on the use of radiochromic films for medical applications. While various aspects of radiochromic film dosimetry for medical applications have been covered in some detail in several other excellent review articles which have appeared in the last few years [Niroomand-Rad, A., Blackwell, C.R., Coursey, B.M., Gall, K.P., McLaughlin, W.L., Meigooni, A.S., Nath, R., Rodgers, J.E., Soares, C.G., 1998. Radiochromic dosimetry: recommendations of the AAPM Radiation Therapy Committee Task Group 55. Med. Phys. 25, 2093-2115; Dempsey, J.F., Low, D.A., Mutic, S., Markman, J., Kirov, A.S., Nussbaum, G.H., Williamson, J.F., 2000. Validation of a precision radiochromic film dosimetry system for quantitative two-dimensional imaging of acute exposure dose distributions. Med. Phys. 27, 2462-2475; Butson, M.J., Yu, P.K.N., Cheung, T., Metcalfe, P., 2003. Radiochromic film for medical radiation dosimetry. Mater. Sci. Eng. R41, 61-120], it is the intent of the present author to present material from a more user-oriented and practical standpoint. That is, how the films work will be stressed much less than how to make the films work well. The strength of radiochromic films is most evident in applications where there is a very high dose gradient and relatively high absorbed dose rates. These conditions are associated with brachytherapy applications, measurement of small fields, and at the edges (penumbra regions) of larger fields

Introduction to this special issue on ocean acidification: the pathway from science to policy

Science.gov (United States)

Mathis, Jeremy T.; Cooley, Sarah R.; Yates, Kimberly K.; Williamson, Phillip

2015-01-01

Ocean acidification (OA) is a progressive decrease in the pH of seawater over decades, caused primarily by uptake of excess atmospheric CO2 and accompanied by changes in seawater carbonate chemistry. Scientific studies designed to examine the effects of anthropogenic carbon dioxide (CO2) emissions on global carbon fluxes have also led to the detection of OA. During the last decade, this phenomenon has surged to the attention of not only scientists but also policymakers and the public. OA chemistry is well understood and follows first principles of acid-base chemistry (e.g., Gattuso and Hansson, 2011; Box 1 in McLaughlin et al.). Today, total anthropogenic release of CO2 exceeds nine petagrams of carbon annually, with ~85% coming directly from industrial sources and ~15% from changes in land use. The three major sinks for this CO2 are: ~46% of CO2 emitted remains in the atmosphere, ~29% is absorbed by the terrestrial biosphere, and the ocean absorbs the remaining ~26% (Le Quéré et al., 2014), resulting in OA. Since the Industrial Revolution, global average surface ocean pH has dropped 0.1 unit (about a 30% increase in acidity; IPCC, 2013), and it is expected to drop another 0.3 to 0.4 units by 2100 (100-150% increase in acidity) if CO2 emissions continue in a business-as-usual scenario (Orr et al., 2005; IPCC, 2013). Some areas of the ocean, such as coastal regions, upwelling zones, and polar seas, may be subjected to much greater chemical perturbations from OA than indicated by such globally averaged values (e.g., Feely et al., 2008; Mathis et al.).

Calcium channel blockers, angiotensin receptor blockers, and angiotensin-converting enzyme inhibitors: Effectiveness in combination with diuretics or β-blockers for treating hypertension

Directory of Open Access Journals (Sweden)

John D Bisognano

2007-11-01

Full Text Available John D Bisognano1, Trent McLaughlin2, Craig S Roberts3, Simon SK Tang31Internal Medicine Department, Cardiology Division, the University of Rochester Medical Center, Rochester, NY, USA; 2NDC Health, Phoenix, Arizona, USA; 3Pfizer Inc, New York, NY, USAAbstract: This retrospective database analysis compared the effectiveness of dihydropyridine calcium channel blockers (DHPs, angiotensin-converting enzyme (ACE inhibitors, and angiotensin receptor blockers (ARBs added to diuretics or β-blockers. Adults with hypertension treated with diuretic or β-blocker monotherapy between 1998 and 2001 were identified from a large US electronic medical records database of primary care practices. Patients were required to have a baseline blood pressure (BP ≥140/90 mmHg (≥130/80 mmHg for diabetes mellitus and recorded BP measurements within 6 months before and 1–12 months following index date. Patients were matched 1:1:1 by propensity score to correct for differences in baseline characteristics. 1875 patients met study criteria and 660 (220 in each cohort were matched based on propensity scores. Matched cohorts had no significant differences in baseline characteristics. Mean changes in systolic/diastolic BP were –17.5/–8.8, –15.7/–6.3, and –13.0/–8.0 mmHg with DHPs, ACE inhibitors, and ARBs, respectively. Joint National Committee on the Prevention, Detection, Evaluation, and Treatment of High BP 6/7 goal attainment for each regimen was 47.3%, 40.0%, and 32.2%, respectively. DHPs, ACE inhibitors, and ARBs improved BP when added to patients’ β-blocker or diuretic therapy. The greatest benefits were observed with DHPs, followed by ACE inhibitors, then ARBs.Keywords: hypertension, amlodipine besylate, lisinopril, valsartan, Joint National Committee (JNC 6 and 7

Evaluation of constructivist pedagogy: Influence on critical thinking skills, science fair participation and level of performance

Science.gov (United States)

Foxx, Robbie Evelyn

Science education reform, driven by a rapidly advancing technological society, demands the attention of both elementary and middle school curriculum-developers. Science education training in current standards (National Research Council [NRC] Standards 1996) emphasize inquiry, which is reported to be a basic tenet of the theory known as constructivism (NAASP, 1996; Cohen, 1988; Conley, 1993; Friedman, 1999; Newman, Marks, & Gamoran, 1996; Smerdon & Burkam 1999; Sizer 1992; Talbert & McLaughlin 1993; Tobin & Gallagher, 1987; Yager, 1991, 2000). Pedagogy focusing on the tenets of constructivist theory, at the intermediate level, can address current science standards. Many science educators believe participation in science fairs helps students develop the attitudes, skills, and knowledge that will help them to be comfortable and successful in the scientific and technological society (Czerniak, 1996). Competing in science fairs is one vehicle which allows students to apply science to societal issues, solve problems and model those things scientists do. Moreover, constructing a science fair project is suggested as being an excellent means to foster the development of concepts necessary in promoting scientific literacy (Czerniak, 1996). Research further suggests that through science fairs or other inquiry activities, students construct their knowledge with fewer misconceptions as they explore and discover the nature of science (NRC 1996). Tohn 's study (as cited in Bellipanni, 1994) stated that science fairs are a major campaign to increase student skills and to allow students a chance to have fun with science. The purpose of this research was twofold: (1) to assess science problem solving skills of students instructed using constructivist pedagogy, and (2) to explore the effects of constructivist pedagogy's influence(s) on science fair participation/placement. Students' attitudes resulting from these experiences were examined as well.

A 30-year chronosequence of burned areas in Arizona: effects of wildfires on vegetation in Sonoran Desert Tortoise (Gopherus morafkai) habitats

Science.gov (United States)

Shryock, Daniel F.; Esque, Todd C.; Chen, Felicia C.

2015-01-01

Fire is widely regarded as a key evolutionary force in fire-prone ecosystems, with effects spanning multiple levels of organization, from species and functional group composition through landscape-scale vegetation structure, biomass, and diversity (Pausas and others, 2004; Bond and Keeley 2005; Pausas and Verdu, 2008). Ecosystems subjected to novel fire regimes may experience profound changes that are difficult to predict, including persistent losses of vegetation cover and diversity (McLaughlin and Bowers, 1982; Brown and Minnich, 1986; Brooks, 2012), losses to seed banks (Esque and others, 2010a), changes in demographic processes (Esque and others, 2004; DeFalco and others, 2010), increased erosion (Soulard and others, 2013), changes in nutrient availability (Esque and others, 2010b), increased dominance of invasive species (Esque and others, 2002; Brooks and others, 2004), and transitions to alternative community states (Davies and others, 2012). In the deserts of the Southwestern United States, fire size and frequency have increased substantially over the last several decades because of an invasive grass/fire feedback cycle (Schmid and Rogers, 1988; D’Antonio and Vitousek, 1992; Swantek and others, 1999; Brooks and Matchett, 2006; Esque and others, 2010a), in which invasive annual species are able to establish fuel loads capable of sustaining large-scale wildfires following years of high rainfall (Esque and Schwalbe, 2002). Native perennial vegetation is not well-adapted to fire in these environments, and widespread, physiognomically dominant species such as creosote bush (Larrea tridentata), Joshua tree (Yucca brevifolia), giant saguaro cactus (Carnegiea gigantea), and paloverde (Parkinsonia spp.) may be reduced or eliminated (Brown and Minnich, 1986; Esque and others, 2006; DeFalco and others, 2010), potentially affecting wildlife populations including the Sonoran and federally threatened Mojave Desert Tortoises (Gopherus morafkai and Gopherus agassizii

Coastal Vulnerability to Erosion Processes: Study Cases from Different Countries

Science.gov (United States)

Anfuso, Giorgio; Martinez Del Pozo, Jose Angel; Rangel-Buitrago, Nelson

2010-05-01

When natural processes affect or threaten human activities or infrastructures they become a natural hazard. In order to prevent the natural hazards impact and the associated economic and human losses, coastal managers need to know the intrinsic vulnerability of the littoral, using information on the physical and ecological coastal features, human occupation and present and future shoreline trends. The prediction of future coastline positions can be based on the study of coastal changes which have occurred over recent decades. Vertical aerial photographs, satellite imagery and maps are very useful data sources for the reconstruction of coast line changes at long (>60 years) and medium (between 60 and 10 years) temporal and spatial scales. Vulnerability maps have been obtained for several coastal sectors around the world through the use of Geographical Information Systems (GIS), computer-assisted multivariate analysis and numerical models. In the USA, "Flood Insurance Rate Maps" have been created by the government and "Coastal Zone Hazard Maps" have been prepared for coastal stretches affected by hurricane Hugo. In Spain, the vulnerability of the Ebro and an Andalusia coastal sector were investigated over different time scales. McLaughlin et al., (2002) developed a GIS based coastal vulnerability index for the Northern Ireland littoral that took into account socio-economic activities and coastal resistance to erosion and energetic characteristics. Lizárraga et al., (2001) combined beach reduction at Rosario (Mexico) with the probability of damage to landward structures, obtaining a vulnerability matrix. In this work several coastal vulnerability maps have also been created by comparing data on coastal erosion/accretion and land use along different coastal sectors in Italy, Morocco and Colombia. Keywords: Hazard, Vulnerability, Coastal Erosion, Italy, Morocco, Colombia.

A new dyed poly (vinyl butyral) film for high-dose applications

International Nuclear Information System (INIS)

Eid, S.A.; Beshir, W.B.; Ebraheem, S.

2006-01-01

The polymer films under investigation are comprising a mixture of 2 dyes, namely, 2,6-dichlorophenol indophenol sodium salt (DCP), and bromo cresol green (BCG) indicator in presence of different concentrations of chloral hydrate. The color of this film changes from the blue to purple and finally to yellow, the bleaching reaction for DCP takes place in the beginning, giving the tinge of purple color, followed by the transformation of BCG to its acidic form due to the presence of chloral hydrate. The response of these films is affected by the change in chloral hydrate concentration and also the ratio of the 2 combined dyes. Accordingly, these films could be used as dosimeter in two steps color change indicators, in the dose range from 0.2 to 6 kGy. To examine their suitability for eventual application in different food radiation processing, the dosimetric parameters, e.g. dose response, effect of relative humidity during irradiation on response as well as pre-and post-irradiation stability of these film are investigated. Using the phenomenon of HCl generation from PVC under irradiation, ph-indicating dyes have been added to PVC. A chlorine-containing polymer is not necessary for this reaction to occur. A similar color change can be produced if chloro alkanes are present in the dye-containing matrix (Whittaker, 1990). Ueno (1988) developed a radiation dosimeter from acidity indicators by coating a high molecular weight polymer support (e.g. polyester film) with a composition containing a halogen-containing polymer (e.g. PVC), a pigment which changes color with the change of ph and a basic material (e.g. KOH in EtOH). For routine dose monitoring in radiation processing, the polymeric dyed flexible films are most commonly used as dosimeters and indicators for both electron beams and gamma rays (Ebraheem et al., 1999 and McLaughlin et al

Relations of ammonium minerals at several hydrothermal systems in the western U.S.

Science.gov (United States)

Krohn, M.D.; Kendall, C.; Evans, J.R.; Fries, T.L.

1993-01-01

Ammonium bound to silicate and sulfate minerals has recently been located at several major hydrothermal systems in the western U.S. utilizing newly-discovered near-infrared spectral properties. Knowledge of the origin and mineralogic relations of ammonium minerals at known hydrothermal systems is critical for the proper interpretation of remote sensing data and for testing of possible links to mineralization. Submicroscopic analysis of ammonium minerals from two mercury- and gold-bearing hot-springs deposits at Ivanhoe, Nevada and McLaughlin, California shows that the ammonium feldspar, buddingtonite, occurs as fine-grained euhedral crystals coating larger sulfide and quartz crystals. Ammonium feldspar seems to precipitate relatively late in the crystallization sequence and shows evidence for replacement of NH4+ by K+ or other monovalent cations. Some buddingtonite is observed in close association with mercury, but not with gold. Ammonioalunite is found in a variety of isolated crystal forms at both deposits. Nitrogen isotopic values for ammonium-bearing minerals show a 14??? range in composition, precluding assignment of a specific provenance to the nitrogen. The correlations of nitrogen isotopic values with depth and ammonium content suggest some loss of nitrogen in the oxidizing supergene environment, possibly as a metastable mineral. The high ammonium content in these hydrothermal systems, the close association to mercury, and the small crystal size of the ammonium-bearing minerals all suggest that ammonium may be transported in a late-stage vapor phase or as an organic volatile. Such a process could lead to the formation of a non-carbonaceous organic aureole above a buried geothermal source. The discovery of a 10-km outcrop of ammonium minerals confirms that significant substitution of ammonium in minerals is possible over an extensive area and that remote sensing is a feasible means to detect such aureoles. ?? 1993.

Assessment of dimensional accuracy of preadjusted metal injection molding orthodontic brackets.

Science.gov (United States)

Alavi, Shiva; Tajmirriahi, Farnaz

2016-09-01

the aim of this study is to evaluate the dimensional accuracy of McLaughlin, Bennett, and Trevisi (MBT) brackets manufactured by two different companies (American Orthodontics and Ortho Organizers) and determine variations in incorporation of values in relation to tip and torque in these products. In the present analytical/descriptive study, 64 maxillary right central brackets manufactured by two companies (American Orthodontics and Ortho Organizers) were selected randomly and evaluated for the accuracy of the values in relation to torque and angulation presented by the manufacturers. They were placed in a video measuring machine using special revolvers under them and were positioned in a manner so that the light beams would be directed on the floor of the slot without the slot walls being seen. Then, the software program of the same machine was used to determine the values of each bracket type. The means of measurements were determined for each sample and were analyzed with independent t -test and one-sample t -test. Based on the confidence interval, it can be concluded that at 95% probability, the means of tip angles of maxillary right central brackets of these two brands were 4.1-4.3° and the torque angles were 16.39-16.72°. The tips in these samples were at a range of 3.33-4.98°, and the torque was at a range of 15.22-18.48°. In the present study, there were no significant differences in the angulation incorporated into the brackets from the two companies; however, they were significantly different from the tiP values for the MBT prescription. In relation to torque, there was a significant difference between the American Orthodontic brackets exhibited significant differences with the reported 17°, too.

Assessment of dimensional accuracy of preadjusted metal injection molding orthodontic brackets

Directory of Open Access Journals (Sweden)

Shiva Alavi

2016-01-01

Full Text Available Background: the aim of this study is to evaluate the dimensional accuracy of McLaughlin, Bennett, and Trevisi (MBT brackets manufactured by two different companies (American Orthodontics and Ortho Organizers and determine variations in incorporation of values in relation to tip and torque in these products. Materials and Methods: In the present analytical/descriptive study, 64 maxillary right central brackets manufactured by two companies (American Orthodontics and Ortho Organizers were selected randomly and evaluated for the accuracy of the values in relation to torque and angulation presented by the manufacturers. They were placed in a video measuring machine using special revolvers under them and were positioned in a manner so that the light beams would be directed on the floor of the slot without the slot walls being seen. Then, the software program of the same machine was used to determine the values of each bracket type. The means of measurements were determined for each sample and were analyzed with independent t-test and one-sample t-test. Results: Based on the confidence interval, it can be concluded that at 95% probability, the means of tip angles of maxillary right central brackets of these two brands were 4.1-4.3° and the torque angles were 16.39-16.72°. The tips in these samples were at a range of 3.33-4.98°, and the torque was at a range of 15.22-18.48°. Conclusion: In the present study, there were no significant differences in the angulation incorporated into the brackets from the two companies; however, they were significantly different from the tiP values for the MBT prescription. In relation to torque, there was a significant difference between the American Orthodontic brackets exhibited significant differences with the reported 17°, too.

Epidemiologic characteristics and risk factors for renal cell cancer

Directory of Open Access Journals (Sweden)

Loren Lipworth

2009-04-01

Full Text Available Loren Lipworth1,2, Robert E Tarone1,2, Lars Lund2,3, Joseph K McLaughlin1,21International Epidemiology Institute, Rockville, MD, USA; 2Department of Medicine (JKM, RET and Preventive Medicine (LL, Vanderbilt University Medical Center and Vanderbilt-Ingram Cancer Center, Nashville, TN, USA; 3Department of Urology, Viborg Hospital, Viborg, DenmarkAbstract: Incidence rates of renal cell cancer, which accounts for 85% of kidney cancers, have been rising in the United States and in most European countries for several decades. Family history is associated with a two- to four-fold increase in risk, but the major forms of inherited predisposition together account for less than 4% of renal cell cancers. Cigarette smoking, obesity, and hypertension are the most consistently established risk factors. Analgesics have not been convincingly linked with renal cell cancer risk. A reduced risk of renal cell cancer among statin users has been hypothesized but has not been adequately studied. A possible protective effect of fruit and vegetable consumption is the only moderately consistently reported dietary finding, and, with the exception of a positive association with parity, evidence for a role of hormonal or reproductive factors in the etiology of renal cell cancer in humans is limited. A recent hypothesis that moderate levels of alcohol consumption may be protective for renal cell cancer is not strongly supported by epidemiologic results, which are inconsistent with respect to the categories of alcohol consumption and the amount of alcohol intake reportedly associated with decreased risk. For occupational factors, the weight of the evidence does not provide consistent support for the hypotheses that renal cell cancer may be caused by asbestos, gasoline, or trichloroethylene exposure. The established determinants of renal cell cancer, cigarette smoking, obesity, and hypertension, account for less than half of these cancers. Novel epidemiologic approaches

Using MicroFTIR to Map Mineral Distributions in Serpentinizing Systems

Science.gov (United States)

Johnson, A.; Kubo, M. D.; Cardace, D.

2016-12-01

Serpentinization, the water-rock reaction forming serpentine mineral assemblages from ultramafic precursors, can co-occur with the production of hydrogen, methane, and diverse organic compounds (McCollom and Seewald, 2013), evolving water appropriate for carbonate precipitation, including in ophiolite groundwater flow systems and travertine-producing seeps/springs. Serpentinization is regarded as a geologic process important to the sustainability of the deep biosphere (Schrenk et al., 2013) and the origin of life (Schulte et al., 2006). In this study, we manually polished wafers of ultramafic rocks/associated minerals (serpentinite, peridotite, pyroxenite, dunite; olivine, diopside, serpentine, magnetite), and travertine/constituent minerals (carbonate crusts; calcite, dolomite), and observed mineral boundaries and interfaces using µFTIR analysis in reflection mode. We used a Thermo Nicolet iS50 FTIR spectrometer coupled with a Continuum IR microscope to map minerals/boundaries. We identify, confirm, and document FTIR wavenumber regions linked to serpentinite- and travertine-associated minerals by referencing IR spectra (RRUFF) and aligning with x-ray diffraction. The ultramafic and carbonate samples are from the following field localities: McLaughlin Natural Reserve - a UC research reserve, Lower Lake, CA; Zambales, PH; Ontario, CA; Yellow Dog, MI; Taskesti, TK; Twin Sisters Range, WA; Sharon, MA; Klamath Mountains, CA; Dun Mountain, NZ; and Sussex County, NJ. Our goals are to provide comprehensive µFTIR characterization of mineral profiles important in serpentinites and related rocks, and evaluate the resolving power of µFTIR for the detection of mineral-encapsulated, residual organic compounds from biological activity. We report on µFTIR data for naturally occurring ultramafics and travertines and also estimate the limit of detection for cell membrane components in mineral matrices, impregnating increasing mass proportions of xanthan gum in a peridotite sand

AAS 228: Day 1 afternoon

Science.gov (United States)

Kohler, Susanna

2016-06-01

)Chris Arumainayagam (Wellesley College) opens up the press conference with a research being carried on exclusively by undergraduate students. He shows that the formation of complex molecules in space is currently explained by high energy cosmic rays and ultra-violet (UV) photons, but then presents their suggestion that low-energy UV photons may also play a significant role in this process. Additionally, if detected, the presence of the molecule Methoxymethanol could help to prove their hypothesis.Philip Hopkins showing results frompress release.Philip Hopkins (Caltech) shows the work on FIRE, a new galaxy evolution simulation that is pushing the limits of the field, and is very successful in resolving some of its biggest issues, such as the abundance of fluffy galaxies, the cold dark matter hypothesis and the missing satellites problem.Gregory Walth (University of California, San Diego) and collaborators discovered an unexpected giant luminous star-forming clump on a galaxy at redshift z = 0.61 which, incidentally, is gravitationally lensed by the galaxy cluster Abell S1063 (z = 0.35). Such clumps are much more common at higher redshifts (z 2), so this discovery raises questions on how common these objects are in the more local universe, and how they were formed.Plenary Session: The Brightest Pulses in the Universe (by MichaelZevin)Fast radio bursts are one of the biggest mysteries in modern astronomy. Attempts to explain their astrophysical origin span from the mergingof relativistic objects to pesky aliens (one of these explanations is more accepted than the other). Maura McLaughlin took the audience on a walk through the history of FRBs and how weve built our current understanding of these perplexing occurrences. The story started with the discovery of radio pulsars by Jocelyn Bell in 1967. Due to the periodicity of the radio beam in these newly-discovered objects, the time-series data of the radio sky was almost always Fourier transformed before analysis and burst events were

Powerful Radio Burst Indicates New Astronomical Phenomenon

Science.gov (United States)

2007-09-01

Astronomers studying archival data from an Australian radio telescope have discovered a powerful, short-lived burst of radio waves that they say indicates an entirely new type of astronomical phenomenon. Region of Strong Radio Burst Visible-light (negative greyscale) and radio (contours) image of Small Magellanic Cloud and area where burst originated. CREDIT: Lorimer et al., NRAO/AUI/NSF Click on image for high-resolution file ( 114 KB) "This burst appears to have originated from the distant Universe and may have been produced by an exotic event such as the collision of two neutron stars or the death throes of an evaporating black hole," said Duncan Lorimer, Assistant Professor of Physics at West Virginia University (WVU) and the National Radio Astronomy Observatory (NRAO). The research team led by Lorimer consists of Matthew Bailes of Swinburne University in Australia, Maura McLaughlin of WVU and NRAO, David Narkevic of WVU, and Fronefield Crawford of Franklin and Marshall College in Lancaster, Pennsylvania. The astronomers announced their findings in the September 27 issue of the online journal Science Express. The startling discovery came as WVU undergraduate student David Narkevic re-analyzed data from observations of the Small Magellanic Cloud made by the 210-foot Parkes radio telescope in Australia. The data came from a survey of the Magellanic Clouds that included 480 hours of observations. "This survey had sought to discover new pulsars, and the data already had been searched for the type of pulsating signals they produce," Lorimer said. "We re-examined the data, looking for bursts that, unlike the usual ones from pulsars, are not periodic," he added. The survey had covered the Magellanic Clouds, a pair of small galaxies in orbit around our own Milky Way Galaxy. Some 200,000 light-years from Earth, the Magellanic Clouds are prominent features in the Southern sky. Ironically, the new discovery is not part of these galaxies, but rather is much more distant

A methodological approach to assess beach-dune system susceptibility to erosion. Cases studies from Valdelagrana spit (Spain) and Campomarino beach (Italy).

Science.gov (United States)

Rizzo, Angela; Aucelli, Pietro P. C.; Gracia, Javier F.; Anfuso, Giorgio; Rosskopf, Carmen M.

2016-04-01

Dunes provide many important services to coastal areas, such as coastal erosion mitigation, coastal flooding protection and biological diversity. Their dynamic equilibrium and geomorphological evolution are the result of the interaction between marine and aeolian processes. Moreover, coastal dunes are characterized by a high ecological value, being a narrow strip between marine and terrestrial ecosystems and are habitats considered of community interest by the Habitats Directive 92/43/EEC. In the meantime, the significant increase of human pressure on coastal environments during the last decades has caused a strong alteration and an increase of the fragility and fragmentation of these habitats. This paper presents a methodological approach for the assessment of the beach-dune system susceptibility to erosion. The aim is to identify, at the local scale, the degree of susceptibility of coastal stretches in order to evaluate the degree of exposure of human settlements and natural environments located behind the dune system and to support actuations to appropriately improve dune management and conservation. A coastal susceptibility matrix and a corresponding Coastal Susceptibility Index (CSI) are proposed. Following the assumption that a good index should be based on a minimum amount of essential information (Cooper and McLaughlin, 1998), possibly already available or easy to be obtained (Villa and McLeod, 2002), the proposed index consisted into eight variables concerning existing beach and dune conditions, covering geomorphological, physical and anthropogenic aspects. Each variable was inserted into a GIS system and overlapped with the others through a logical overlay operation. The resulting layer was reclassified according to the formula proposed by Rangel and Anfuso (2015) allowing to calculate the CSI, which ranged from 1 (null/very low susceptibility) to 5 (very high susceptibility). In a further step, the predominant processes occurred in the last decades were

The effects of student-level and classroom-level factors on elementary students' science achievement in five countries

Science.gov (United States)

Kaya, Sibel

needed. For all the countries investigated, with the exception of Singapore, the between-class variance was much smaller than the within-class variance. Japan had the smallest variation in science achievement among classrooms which indicates the homogeneity across classrooms in Japan. Increasing awareness and knowledge of gender neutral instructional techniques, providing a non-threatening, rich and supportive environment for both genders in classrooms by elementary teachers are to be encouraged. To improve students' self beliefs about science, it is recommended that teachers model science activities and accommodate students' needs and abilities (Bandura, 1997; Britner & Pajares, 2006). Schools and teachers are recommended to develop a successful home-school partnership for improved student learning and positive attitudes toward science (Eccles & Harold, 1996; Epstein & Salinas, 2004). Furthermore, developing a knowledge base for teachers regarding the influences of classroom and school composition is highlighted (Honig, Kahne, & McLaughlin, 2001; Murrel, 2001). At the classroom- and school-level, policy efforts could focus on the distribution of educational resources (Condron & Roscigno, 2003; Goesling, 2003) to compensate for poor family background.

Magmatic-vapor expansion and the formation of high-sulfidation gold deposits: Chemical controls on alteration and mineralization

Science.gov (United States)

Henley, R.W.; Berger, B.R.

2011-01-01

from any external contemporary hydrothermal activity. Subsequent fracturing is localized by the embrittled wallrock to provide high-permeability fracture arrays that constrain vapor expansion with minimization of heat loss. The Sulfide Stage vein sequence is then a consequence of destabilization of metal-vapor species in response to depressurization and decrease in vapor density. The geology, mineralogy, fluid inclusion and stable isotope data and geothermometry for high-sulfidation, bulk-tonnage and lode deposits are quite different from those for epithermal gold-silver deposits such as McLaughlin, California that formed near-surface in groundwater-dominated hydrothermal systems where magmatic fluid has been diluted to less than about 30%. High sulfidation gold deposits are better termed 'Solfataric Gold Deposits' to emphasize this distinction. The magmatic-vapor expansion hypothesis also applies to the phenomenology of acidic geothermal systems in active volcanic systems and equivalent magmatic-vapor discharges on the flanks of submarine volcanoes. ?? 2010.

Technology-Enhanced Science: Using an Online Blog to Share a Collaborative Field Study for Research and Education

Science.gov (United States)

Mccann, A. R.; Cardace, D.; Carnevale, D.

2011-12-01

The role of technology is an increasingly important resource in preparing students for the future. The Internet is a widely accessible tool. Technology has also made us more connected, allowing constant communication and instantaneous data sharing. Public utilities such as those found on the web, including blogs, are a means to convey scientific research in rapid, useful ways. This tool is ideal for newly emerging fields, allowing up-to-date collaboration and referencing of ongoing studies, as well as bringing students virtually into the field or laboratory through videos, pictures, and records of project work. Astrobiology is a high interest topic, integrating geology, chemistry, biology, and physics. Terrestrial Mars analog environments are compelling in that they shed light on unusual opportunities for diverse life in settings beyond Earth. For this study, the analog site locality is at the University of California-Davis McLaughlin Natural Reserve in the Coast Range Ophiolite, a portion of actively serpentinizing, uplifted oceanic material in northern California (see companion poster, McCann et al., Mineralogy of Surface Serpentinite Outcrops in the Coast Range Ophiolite: Implications for the Deep Biosphere and Astrobiology). Our research objective is to monitor the activity taking place within the subsurface biosphere through an interdisciplinary approach involving biogeochemists, microbiologists, organic geochemists, and geologists. The study of serpentinization with astrobiological ground-truthing is a relatively new and promising field. Scientific field procedures are constantly being modified as they are applied. In order to better collaborate study efforts, a daily field journal is being written, recording ideas, discussions, procedures, problems, solutions, and results. It serves as an informal report, including pictures and video clips of the field activity. The journal is maintained as an online blog for ease of use and accessibility, as well as public

FOREWORD: Imaging from coupled physics Imaging from coupled physics

Science.gov (United States)

Arridge, S. R.; Scherzer, O.

2012-08-01

absorption of an ultrashort pulse of light, having propagated by multiple scattering some distance into a diffusing medium, generates a source of acoustic waves that are propagated with hyperbolic stability to a surface detector. A complementary problem is that of 'acousto-optics' which uses focussed acoustic waves as the primary field to induce perturbations in optical or electrical properties, which are thus spatially localized. Similar physical principles apply to implement ultrasound modulated electrical impedance tomography (UMEIT). These topics are included in the review of Wildak and Scherzer [1], and Kuchment and Steinhauer [2] offer a general analysis of their structure in terms of pseudo-differential operators. 'Acousto-electrical' imaging is analyzed as a particular case by Ammari et al [6]. In the paper by Tarvainen et al [7], the photo-acoustic problem is studied with respect to different models of the light propagation step. In the paper by Monard and Bal [8], a more general problem for the reconstruction of an anisotropic diffusion parameter from power density measurements is considered; here, issues of uniqueness with respect to the number of measurements is of great importance. A distinctive, and highly important, example of ICP is that of elastography, in which the primary field is low-frequency ultrasound giving rise to mechanical displacement that reveals information on the local elasticity tensor. As in all the methods discussed in this section, this contrast mechanism is measured internally, with a secondary technique, which in this case can be either MRI or ultrasound. McLaughlin et al [9] give a comprehensive analysis of this problem. Our intention for this special section was to provide both an overview and a snapshot of current work in this exciting area. The increasing interest, and the involvement of cross-disciplinary groups of scientists, will continue to lead to the rapid expansion and important new results in this novel area of imaging science

Students Excited by Stellar Discovery

Science.gov (United States)

2011-02-01

follow-up observations, and Thompson joined online. "Observing with the students is very exciting. It gives the students a chance to learn about radio telescopes and pulsar observing in a very hands-on way, and it is extra fun when we find a pulsar," said Rosen. Snider, on the other hand, said, "I got very, very nervous. I expected when I went there that I would just be watching other people do things, and then I actually go to sit down at the controls. I definitely didn't want to mess something up." Everything went well, and the observations confirmed that the students had found an exotic pulsar. "I learned more in the two hours in the control room than I would have in school the whole day," Mabry said. Pulsars are spinning neutron stars that sling lighthouse beams of radio waves or light around as they spin. A neutron star is what is left after a massive star explodes at the end of its normal life. With no nuclear fuel left to produce energy to offset the stellar remnant's weight, its material is compressed to extreme densities. The pressure squeezes together most of its protons and electrons to form neutrons; hence, the name neutron star. One tablespoon of material from a pulsar would weigh 10 million tons -- as much as a supertanker. The object that the students discovered is in a special class of pulsar that spins very fast - in this case, about 30 times per second, comparable to the speed of a kitchen blender. "The big question we need to answer first is whether this is a young pulsar or a recycled pulsar," said Maura McLaughlin, an astronomer at WVU. "A pulsar spinning that fast is very interesting as it could be newly born or it could be a very old, recycled pulsar." A recycled pulsar is one that was once in a binary system. Material from the companion star is deposited onto the pulsar, causing it to speed up, or be recycled. Mystery remains, however, about whether this pulsar has ever had a companion star. If it did, "it may be that this pulsar had a massive

Developing Switchgrass as a Bioenergy Crop

Energy Technology Data Exchange (ETDEWEB)

Bouton, J.; Bransby, D.; Conger, B.; McLaughlin, S.; Ocumpaugh, W.; Parrish, D.; Taliaferro, C.; Vogel, K.; Wullschleger, S.

1998-11-08

The utilization of energy crops produced on American farms as a source of renewable fuels is a concept with great relevance to current ecological and economic issues at both national and global scales. Development of a significant national capacity to utilize perennial forage crops, such as switchgrass (Panicum virgatum, L.) as biofuels could benefit our agricultural economy by providing an important new source of income for farmers. In addition energy production from perennial cropping systems, which are compatible with conventional fining practices, would help reduce degradation of agricultural soils, lower national dependence on foreign oil supplies, and reduce emissions of greenhouse gases and toxic pollutants to the atmosphere (McLaughlin 1998). Interestingly, on-farm energy production is a very old concept, extending back to 19th century America when both transpofiation and work on the farm were powered by approximately 27 million draft animals and fueled by 34 million hectares of grasslands (Vogel 1996). Today a new form of energy production is envisioned for some of this same acreage. The method of energy production is exactly the same - solar energy captured in photosynthesis, but the subsequent modes of energy conversion are vastly different, leading to the production of electricity, transportation fuels, and chemicals from the renewable feedstocks. While energy prices in the United States are among the cheapest in the world, the issues of high dependency on imported oil, the uncertainties of maintaining stable supplies of imported oil from finite reserves, and the environmental costs associated with mining, processing, and combusting fossil fuels have been important drivers in the search for cleaner burning fuels that can be produced and renewed from the landscape. At present biomass and bioenergy combine provide only about 4% of the total primary energy used in the U.S. (Overend 1997). By contrast, imported oil accounts for approximately 44% of the

An Equivalent cross-section Framework for improving computational efficiency in Distributed Hydrologic Modelling

Science.gov (United States)

Khan, Urooj; Tuteja, Narendra; Ajami, Hoori; Sharma, Ashish

2014-05-01

the accuracy of equivalent cross-section approach, the sub-basins are also divided into equally spaced multiple hillslope cross-sections. These cross-sections are simulated in a fully distributed settings using the 2-dimensional, Richards' equation based distributed hydrological model. The simulated fluxes are multiplied by the contributing area of each cross-section to get total fluxes from each sub-basin referred as reference fluxes. The equivalent cross-section approach is investigated for seven first order sub-basins of the McLaughlin catchment of the Snowy River, NSW, Australia, and evaluated in Wagga-Wagga experimental catchment. Our results show that the simulated fluxes using an equivalent cross-section approach are very close to the reference fluxes whereas computational time is reduced of the order of ~4 to ~22 times in comparison to the fully distributed settings. The transpiration and soil evaporation are the dominant fluxes and constitute ~85% of actual rainfall. Overall, the accuracy achieved in dominant fluxes is higher than the other fluxes. The simulated soil moistures from equivalent cross-section approach are compared with the in-situ soil moisture observations in the Wagga-Wagga experimental catchment in NSW, and results found to be consistent. Our results illustrate that the equivalent cross-section approach reduces the computational time significantly while maintaining the same order of accuracy in predicting the hydrological fluxes. As a result, this approach provides a great potential for implementation of distributed hydrological models at regional scales.

IARC Monographs: 40 Years of Evaluating Carcinogenic Hazards to Humans

Science.gov (United States)

Blair, Aaron; Vineis, Paolo; Ahrens, Wolfgang; Andersen, Aage; Anto, Josep M.; Armstrong, Bruce K.; Baccarelli, Andrea A.; Beland, Frederick A.; Berrington, Amy; Bertazzi, Pier Alberto; Birnbaum, Linda S.; Brownson, Ross C.; Bucher, John R.; Cantor, Kenneth P.; Cardis, Elisabeth; Cherrie, John W.; Christiani, David C.; Cocco, Pierluigi; Coggon, David; Comba, Pietro; Demers, Paul A.; Dement, John M.; Douwes, Jeroen; Eisen, Ellen A.; Engel, Lawrence S.; Fenske, Richard A.; Fleming, Lora E.; Fletcher, Tony; Fontham, Elizabeth; Forastiere, Francesco; Frentzel-Beyme, Rainer; Fritschi, Lin; Gerin, Michel; Goldberg, Marcel; Grandjean, Philippe; Grimsrud, Tom K.; Gustavsson, Per; Haines, Andy; Hartge, Patricia; Hansen, Johnni; Hauptmann, Michael; Heederik, Dick; Hemminki, Kari; Hemon, Denis; Hertz-Picciotto, Irva; Hoppin, Jane A.; Huff, James; Jarvholm, Bengt; Kang, Daehee; Karagas, Margaret R.; Kjaerheim, Kristina; Kjuus, Helge; Kogevinas, Manolis; Kriebel, David; Kristensen, Petter; Kromhout, Hans; Laden, Francine; Lebailly, Pierre; LeMasters, Grace; Lubin, Jay H.; Lynch, Charles F.; Lynge, Elsebeth; ‘t Mannetje, Andrea; McMichael, Anthony J.; McLaughlin, John R.; Marrett, Loraine; Martuzzi, Marco; Merchant, James A.; Merler, Enzo; Merletti, Franco; Miller, Anthony; Mirer, Franklin E.; Monson, Richard; Nordby, Karl-Cristian; Olshan, Andrew F.; Parent, Marie-Elise; Perera, Frederica P.; Perry, Melissa J.; Pesatori, Angela Cecilia; Pirastu, Roberta; Porta, Miquel; Pukkala, Eero; Rice, Carol; Richardson, David B.; Ritter, Leonard; Ritz, Beate; Ronckers, Cecile M.; Rushton, Lesley; Rusiecki, Jennifer A.; Rusyn, Ivan; Samet, Jonathan M.; Sandler, Dale P.; de Sanjose, Silvia; Schernhammer, Eva; Costantini, Adele Seniori; Seixas, Noah; Shy, Carl; Siemiatycki, Jack; Silverman, Debra T.; Simonato, Lorenzo; Smith, Allan H.; Smith, Martyn T.; Spinelli, John J.; Spitz, Margaret R.; Stallones, Lorann; Stayner, Leslie T.; Steenland, Kyle; Stenzel, Mark; Stewart, Bernard W.; Stewart, Patricia A.; Symanski, Elaine; Terracini, Benedetto; Tolbert, Paige E.; Vainio, Harri; Vena, John; Vermeulen, Roel; Victora, Cesar G.; Ward, Elizabeth M.; Weinberg, Clarice R.; Weisenburger, Dennis; Wesseling, Catharina; Weiderpass, Elisabete; Zahm, Shelia Hoar

2015-01-01

, Cardis E, Cherrie JW, Christiani DC, Cocco P, Coggon D, Comba P, Demers PA, Dement JM, Douwes J, Eisen EA, Engel LS, Fenske RA, Fleming LE, Fletcher T, Fontham E, Forastiere F, Frentzel-Beyme R, Fritschi L, Gerin M, Goldberg M, Grandjean P, Grimsrud TK, Gustavsson P, Haines A, Hartge P, Hansen J, Hauptmann M, Heederik D, Hemminki K, Hemon D, Hertz-Picciotto I, Hoppin JA, Huff J, Jarvholm B, Kang D, Karagas MR, Kjaerheim K, Kjuus H, Kogevinas M, Kriebel D, Kristensen P, Kromhout H, Laden F, Lebailly P, LeMasters G, Lubin JH, Lynch CF, Lynge E, ‘t Mannetje A, McMichael AJ, McLaughlin JR, Marrett L, Martuzzi M, Merchant JA, Merler E, Merletti F, Miller A, Mirer FE, Monson R, Nordby KC, Olshan AF, Parent ME, Perera FP, Perry MJ, Pesatori AC, Pirastu R, Porta M, Pukkala E, Rice C, Richardson DB, Ritter L, Ritz B, Ronckers CM, Rushton L, Rusiecki JA, Rusyn I, Samet JM, Sandler DP, de Sanjose S, Schernhammer E, Seniori Costantini A, Seixas N, Shy C, Siemiatycki J, Silverman DT, Simonato L, Smith AH, Smith MT, Spinelli JJ, Spitz MR, Stallones L, Stayner LT, Steenland K, Stenzel M, Stewart BW, Stewart PA, Symanski E, Terracini B, Tolbert PE, Vainio H, Vena J, Vermeulen R, Victora CG, Ward EM, Weinberg CR, Weisenburger D, Wesseling C, Weiderpass E, Zahm SH. 2015. IARC Monographs: 40 years of evaluating carcinogenic hazards to humans. Environ Health Perspect 123:507–514; http://dx.doi.org/10.1289/ehp.1409149 PMID:25712798

PREFACE: First International Congress of the International Association of Inverse Problems (IPIA): Applied Inverse Problems 2007: Theoretical and Computational Aspects

Science.gov (United States)

Uhlmann, Gunther

2008-07-01

This volume represents the proceedings of the fourth Applied Inverse Problems (AIP) international conference and the first congress of the Inverse Problems International Association (IPIA) which was held in Vancouver, Canada, June 25 29, 2007. The organizing committee was formed by Uri Ascher, University of British Columbia, Richard Froese, University of British Columbia, Gary Margrave, University of Calgary, and Gunther Uhlmann, University of Washington, chair. The conference was part of the activities of the Pacific Institute of Mathematical Sciences (PIMS) Collaborative Research Group on inverse problems (http://www.pims.math.ca/scientific/collaborative-research-groups/past-crgs). This event was also supported by grants from NSF and MITACS. Inverse Problems (IP) are problems where causes for a desired or an observed effect are to be determined. They lie at the heart of scientific inquiry and technological development. The enormous increase in computing power and the development of powerful algorithms have made it possible to apply the techniques of IP to real-world problems of growing complexity. Applications include a number of medical as well as other imaging techniques, location of oil and mineral deposits in the earth's substructure, creation of astrophysical images from telescope data, finding cracks and interfaces within materials, shape optimization, model identification in growth processes and, more recently, modelling in the life sciences. The series of Applied Inverse Problems (AIP) Conferences aims to provide a primary international forum for academic and industrial researchers working on all aspects of inverse problems, such as mathematical modelling, functional analytic methods, computational approaches, numerical algorithms etc. The steering committee of the AIP conferences consists of Heinz Engl (Johannes Kepler Universität, Austria), Joyce McLaughlin (RPI, USA), William Rundell (Texas A&M, USA), Erkki Somersalo (Helsinki University of Technology

Charge transfer in ionic systems

International Nuclear Information System (INIS)

Bacchus-Montabonel, M.C.; Tergiman, Y.S.; Vaeck, N.; Baloitcha, E.; Desouter-Lecomte, M.

2002-01-01

Charge transfer involving multiply charged ions in collision with atomic or molecular targets are determinant processes in controlled thermonuclear fusion research and astrophysical plasma. In such processes, an electron is generally captured in a excited state of the ion, followed by line emission. The observation of line intensities provides important information on the electron temperature, density and spacial distributions in the emitting region of the plasma. From a theoretical point of view, different approaches may be used with regard to the collisional energy range of the process. A semi-classical method is currently used at keV energies, but the description of very low-velocity processes requires a complete quantum mechanical treatment of the dynamics of both electrons and nuclei. The first approach extensively used is the resolution of the stationary close-coupling equations, but we have analyzed recently the efficiency of a time-dependent wave packet method which provides a clear and physical insight into the dynamics of the processes and may be particularly interesting for polyatomic systems since it allows the possibility of developing a fully quantal mechanical treatment for some degrees of freedom, the other ones being treated classically. The keV energy range treatment is presented on two examples pointing out the case of complex ion-atom collision systems, as well as the differences between ion-atom and ion-molecule mechanisms. In connection with translation energy spectroscopy experiments of McLaughlin et al in the 4-28 keV impact energy range, we present a complete ab-initio theoretical approach of the N 4+ (2s) 2 S + He system taking into account both single and double electron capture channels. This is an extremely complex collisional system which involves numerous channels with short range interactions and a very intricate interaction region may be observed for interatomic distances around R = 3.5 a.u.. In agreement with experimental data, the

Unique Stellar System Gives Einstein a Thumbs-Up

Science.gov (United States)

2008-07-01

down the geometry of the double-pulsar system and track changes in the orientation of the spin axis of one of them. As one pulsar's spin axis slowly moved, the pattern of signal blockages as the other passed behind it also changed. The signal from the pulsar in back is absorbed by the ionized gas in the other's magnetosphere. Pulsars, first discovered in 1967, are the "corpses" of massive stars that have exploded as supernovae. What is left after the explosion is a superdense neutron star that packs more than the mass of our Sun into the size of an average city. Beams of radio waves stream outward from the poles of the star's intense magnetic field and sweep around as the star rotates, as often as hundreds of times a second. The pair of pulsars studied with the GBT is about 1700 light-years from Earth. The average distance between the two is only about twice the distance from the Earth to the Moon. The two orbit each other in just under two and a half hours. "A system like this, with two very massive objects very close to each other, is precisely the kind of extreme 'cosmic laboratory' needed to test Einstein's prediction," said Victoria Kaspi, leader of McGill University's Pulsar Group. Theories of gravity don't differ significantly in "ordinary" regions of space such as our own Solar System. In regions of extremely strong gravity fields, such as near a pair of close, massive objects, however, differences are expected to show up. In the binary-pulsar study, General Relativity "passed the test" provided by such an extreme environment, the scientists said. "It's not quite right to say that we have now 'proven' General Relativity," Breton said. "However, so far, Einstein's theory has passed all the tests that have been conducted, including ours." Breton, Kaspi and Ransom worked with Michael Kramer of the Jodrell Bank Observatory at the University of Manchester in Great Britain; Maura McLaughlin of West Virginia University and the NRAO; Maxim Lyutikov of Purdue University

Developing an outcome-based biodiversity metric in support of the field to market project: Final report

Science.gov (United States)

Drew, C. Ashton; Alexander-Vaughn, Louise B.; Collazo, Jaime A.; McKerrow, Alexa; Anderson, John

2013-01-01

depends on that animal’s resource specialization, mobility, and life history strategies (Jeanneret et al. 2003a, b; Jennings & Pocock 2009). The knowledge necessary to define the biodiversity contribution of agricultural lands is specialized, dispersed, and nuanced, and thus not readily accessible. Given access to clearly defined biodiversity tradeoffs between alternative agricultural practices, landowners, land managers and farm operators could collectively enhance the conservation and economic value of agricultural landscapes. Therefore, Field to Market: The Keystone Alliance for Sustainable Agriculture and The Nature Conservancy jointly funded a pilot project to develop a biodiversity metric to integrate into Field to Market’s existing sustainability calculator, The Fieldprint Calculator (http://www. fieldtomarket.org/). Field to Market: The Keystone Alliance for Sustainable Agriculture is an alliance among producers, agribusinesses, food companies, and conservation organizations seeking to create sustainable outcomes for agriculture. The Fieldprint Calculator supports the Keystone Alliance’s vision to achieve safe, accessible, and nutritious food, fiber and fuel in thriving ecosystems to meet the needs of 9 billion people in 2050. In support of this same vision, our project provides proof-of-concept for an outcome-based biodiversity metric for Field to Market to quantify biodiversity impacts of commercial row crop production on terrestrial vertebrate richness. Little research exists examining the impacts of alternative commercial agricultural practices on overall terrestrial biodiversity (McLaughlin & Mineau 1995). Instead, most studies compare organic versus conventional practices (e.g. Freemark & Kirk 2001; Wickramasinghe et al. 2004), and most studies focus on flora, avian, or invertebrate communities (Jeanneret et al. 2003a; Maes et al. 2008; Pollard & Relton 1970). Therefore, we used an expert-knowledge-based approach to develop a metric that predicts

The effects of mulching on soil erosion by water. A review based on published data

Science.gov (United States)

Prosdocimi, Massimo; Jordán, Antonio; Tarolli, Paolo; Cerdà, Artemi

2016-04-01

lands, post-fire affected areas and anthropic sites. Data published in literature have been collected. The results proved the beneficial effects of mulching on soil erosion by water in all the contexts considered, with reduction rates in average sediment concentration, soil loss and runoff volume that, in some cases, exceeded 90%. Furthermore, in most cases, mulching confirmed to be a relatively inexpensive soil conservation practice that allowed to reduce soil erodibility and surface immediately after its application. References Cerdà, A., 1994. The response of abandoned terraces to simulated rain, in: Rickson, R.J., (Ed.), Conserving Soil Resources: European Perspective, CAB International, Wallingford, pp. 44-55. Cerdà, A., Flanagan, D.C., Le Bissonnais, Y., Boardman, J., 2009. Soil erosion and agriculture. Soil & Tillage Research 106, 107-108. Cerdan, O., Govers, G., Le Bissonnais, Y., Van Oost, K., Poesen, J., Saby, N., Gobin, A., Vacca, A., Quinton, J., Auerwald, K., Klik, A., Kwaad, F.J.P.M., Raclot, D., Ionita, I., Rejman, J., Rousseva, S., Muxart, T., Roxo, M.J., Dostal, T., 2010. Rates and spatial variations of soil erosion in Europe: A study based on erosion plot data. Geomorphology 122, 167-177. García-Orenes, F., Roldán A., Mataix-Solera, J, Cerdà, A., Campoy M, Arcenegui, V., Caravaca F. 2009. Soil structural stability and erosion rates influenced by agricultural management practices in a semi-arid Mediterranean agro-ecosystem. Soil Use and Management 28: 571-579. Hayes, S.A., McLaughlin, R.A., Osmond, D.L., 2005. Polyacrylamide use for erosion and turbidity control on construction sites. Journal of soil and water conservation 60(4):193-199. Jordán, A., Zavala, L.M., Muñoz-Rojas, M., 2011. Mulching, effects on soil physical properties. In: Gliński, J., Horabik, J., Lipiec, J. (Eds.), Encyclopedia of Agrophysics. Springer, Dordrecht, pp. 492-496. Montgomery, D.R., 2007. Soil erosion and agricultural sustainability. PNAS 104, 13268-13272. Prats, S

Obituary: Benjamin Franklin Peery Jr. (1922-2010)

Science.gov (United States)

Cowley, Charles

2011-12-01

Professor Benjamin F. Peery, Jr. died at his home in Silver Spring, MD of natural causes on 30 November 2010. His full life began in St. Joseph, MO (home of the Pony Express) on 4 March 1922. His father was a railway mail clerk, so his family moved frequently. Most of his childhood was spent in southeastern Minnesota. He enlisted in the army in 1942, and served in campaigns in North Africa and Italy. After his discharge in 1945, he enrolled in the University of Minnesota, earning a BS in Physics in 1949. One of his early hobbies was to build and fly model airplanes. His intention to pursue aeronautical engineering changed to physics, but after receiving a MS in physics from Fisk University in 1955, he decided on a career in astronomy. He told the editors of the PBS series The Astronomers (1991, in which his career is highlighted) he thought it was shamefully absurd not to know what made the stars shine. So he began PhD studies in astronomy at the University of Michigan (Ann Arbor). His dissertation was on the complex eclipsing binary VV Cephei, where a compact hot star passes behind a cool giant star, revealing the structure of that giant's atmosphere. This task was especially demanding because of the complexity of the system's spectrum and the formidable array of observations assembled by Ben's advisor, Dean McLaughlin. Fortunately, Ben's strong physics background enabled him to design and construct one of the first oscilloscope measuring engines, which his fellow students called the PeeryScope. The final (1961) dissertation is an impressive combination of observational and astrophysical analysis. His degree was obtained in 1962; he had already begun a career at the University of Indiana, where he taught and did research (1959--1976). The Indiana years were highly productive. In addition to his own research, he was advisor on six PhD dissertations, and a master's thesis. Several of his students have also had productive careers. An ADS search on his students' names

Simulation and modeling of turbulent non isothermal vapor-droplet dispersed flow

International Nuclear Information System (INIS)

Baalbaki, Daoud

2011-01-01

with a more elaborated model called Q2Q12. The results of different combinations of these models are verified with the help of the experimental data realized in a similar case by Kulick et al. (1994). Moreover the interfacial turbulence coupling between the two phases is analyzed and the modification of the modeling of this term in the Q2Q12 model is proposed. The proposed modeling is then verified based on the experimental results of Kulick et al. (1994). Due to its critical role in the prediction of the droplets distribution, the modeling of the lift force is studied separately in chapter 5. A detailed bibliographical study is presented about the classical analytical modeling of this force. Then a parametric study is presented about the compatibility of these models to the present case. Due to recent DNS results achieved in this domain, as the results of Sugioka and Komori (2006) and Zeng et al. (2009), we succeeded to propose two new modeling. The first one is based on the model of Saffman (1965) by extending the correction proposed by McLaughlin (1991) to cover a wide range of Reynolds number and the second is a proposed numerical correlation that fits the results from direct numerical simulation (DNS). Back to the context of the study, chapter 6 is dedicated to check the impact of the modeling proposed in this study on the thermal transfer through the flow. For this purpose, a series of simulations are achieved for a case with hot walls. From the seven transfer mechanisms presented in figure 1.2, only the convection models are considered because the other models are still under construction in parallel projects. The models are evaluated by quantifying the heat extracted by flow from the wall and results are presented. Finally, a general conclusion and a perspectives will be drawn

Obituary: Donald Alexander Macrae, 1916-2006

Science.gov (United States)

Seaquist, E. R.

2007-12-01

led him to introduce this subject area into the Toronto graduate research and teaching curriculum. In collaboration with the Department of Electrical Engineering, he established a radio astronomy observing site at the U of T's David Dunlap Observatory (DDO) in 1956. This was at a time when few astronomers took this subject seriously. The DDO work led to the precise determination of the absolute flux density of Cas A at 320 MHz, a radiometric standard as important today as it was when it was reported in 1963. On behalf of the University of Toronto, he subsequently participated in radio astronomy activity at the National Research Council's (NRC's) new Algonquin Radio Observatory in Algonquin Park. The radio astronomy program that Don established was an early stimulus for the first successful experiment in Very Long Baseline Interferometry in 1967, a collaboration among the University of Toronto, Queen's University, and NRC. As a teacher, Don was highly regarded by his students, whom he engaged with his characteristic wit and frequent anecdotes. His lectures always were well prepared and organized, and endowed with an underlying belief that the ideas and principles of physics were most easily understood by applying them first to the stars. As an innovative teacher, he was the first professor at Toronto to teach computer programming at the university, recognizing early that students would need such skills in their scientific careers. Similarly, he was a strong advocate for public outreach. He was featured in the Oscar-nominated short film "Universe" produced in 1960 by the National Film Board of Canada. He also was instrumental in the establishment of the McLaughlin Planetarium, which opened in Toronto in October 1968. In honor of his strong record in education, the U of T established an undergraduate scholarship in Don's name in 2003 to reward promising undergraduates in the astronomy program. In 1965, Don became Head of the Department and Director of the DDO, and

AAS 228: Day 2 afternoon

Science.gov (United States)

Kohler, Susanna

2016-06-01

-mathematical sense!), the latter has always won the debate. Whether we talk about a small Ptolemaic geocentric universe or a larger-than-life Copernican heliocentric solar system, the Milky way being the only galaxy vs. us being one of many, or a static versus an accelerating universe, the latter has been victorious. Hence Trimble asks, then who are we to stop at a universe, with existing ideas of a multiverse! If you put 3 cosmologists is a room, two of them will say the 3rd doesnt understand Malmquist bias. Virginia Trimble #aas228 Risa Wechsler (@RisaWechsler) June 14, 2016Stay tuned for tomorrows parts III and IV of The Limits of Scientific Cosmology!Plenary Session Things That Go Bump in the Night: The Transient Radio Sky (by Susanna Kohler)This afternoon plenary was given by Dale Frail of the National Radio Astronomy Observatory, who injected some pop culture into our day by introducing radio transients as some of the nights terrors that Game of Thrones warned us about.Dale Frail opens his plenary talk with the night is dark and full of terrors. #GoT #aas228 pic.twitter.com/uWGAnZd0X9 astrobites (@astrobites) June 14, 2016Transient sources are those that change, often rapidly, while we observe them. Radio transients are an incredibly broad category, spanning sources that can vary on fraction-of-a-second timescales (like pulsars) to year-long timescales (like jets from active galactic nuclei).Radio transients as a category includes a lot of different sources! #aas228 pic.twitter.com/4x5OoYalqv astrobites (@astrobites) June 14, 2016In general, Frail emphasized, the radio sky is quiet; radio transients are actually quite rare. But the list of potential radio transients, while including many known sources, also pushes into more speculative territory. Interesting examples include the mysterious Fast Radio Bursts (FRBs) discussed in yesterdays plenary by Maura McLaughlin, and electromagnetic counterparts to gravitational waves.Frail gave an overview of what we currently know about