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Articles 2851 - 2880 of 9095
Full-Text Articles in Entire DC Network
Anomalous Wave Dispersion In The Cyclohexanedione-Bromate Chemical Oscillator, Ryan Boger
Anomalous Wave Dispersion In The Cyclohexanedione-Bromate Chemical Oscillator, Ryan Boger
Graduate Student Theses, Dissertations, & Professional Papers
A modified six-variable Oregonator model presented here successfully reproduces a significant portion of the behavior observed in the Ferroin-catalyzed cyclohexanedione variant of the Belousov-Zhabotinsky (CHD-BZ) reaction. The phenomena of anomalous velocity dispersion (in which following waves may catch up to, rather than fall behind an initial excitation wave), wave-stacking, and backfiring have been successfully reproduced numerically as resulting from non-monotonic [Br-] decay to the steady state in the wake of an excitation pulse. The non-monotonic decay is seen as a "dip" in [Br-] following the passage of a chemical wave. This dip in [Br-] decay curve allows a following wave …
Psychometric Evaluations Of An Acculturation Scale And An Acculturation Stress Scale With American Indian University Students, Michael Brian Trahan
Psychometric Evaluations Of An Acculturation Scale And An Acculturation Stress Scale With American Indian University Students, Michael Brian Trahan
Graduate Student Theses, Dissertations, & Professional Papers
Acculturation and acculturation stress are constructs studied with various minority groups. This study tests the factor loadings for both the Native American Acculturation Scale (N.A.A.S.) and the Social, Attitudinal, Familial, and Environmental Acculturation Stress Scale (S.A.F.E.), as well as the reliability of these measures with American Indian undergraduate and graduate students in a university setting. The first hypothesis was that the factor loadings of the N.A.A.S. with this sample would not resemble the original factor structure found by Garrett and Pichette (2000). It was also believed that the N.A.A.S. would exhibit robust reliability with this sample, based upon a previous, …
Muscle-Fiber Type And Blood Oxidative Stress After Eccentric Exercise, John Quindry, Lindsey Miller, Graham Mcginnis, Megan Irwin, Charles Dumke, Meir Magal, N, Travis Triplett, Jeffrey Mcbride, Zea Urbiztondo
Muscle-Fiber Type And Blood Oxidative Stress After Eccentric Exercise, John Quindry, Lindsey Miller, Graham Mcginnis, Megan Irwin, Charles Dumke, Meir Magal, N, Travis Triplett, Jeffrey Mcbride, Zea Urbiztondo
Integrative Physiology and Athletic Training Faculty Publications
Acute strength exercise elicits a transient oxidative stress, but the factors underlying the magnitude of this response remain unknown. The purpose of this investigation was to determine whether muscle-fiber type relates to the magnitude of blood oxidative stress after eccentric muscle activity. Eleven college-age men performed 3 sets of 50 eccentric knee-extensions. Blood samples taken pre-, post-, and 24, 48, 72, and 96 hr postexercise were assayed for comparison of muscle damage and oxidative-stress biomarkers including protein carbonyls (PCs). Vastus lateralis muscle biopsies were assayed for relative percentage of slow-and fast-twitch muscle fibers. There was a mixed fiber composition (Type …
Sensitivity Of The Frozen/Melted Basal Boundary To Perturbations Of Basal Traction And Geothermal Heat Flux : Isunnguata Sermia, Western Greenland, Douglas John Brinkerhoff, Toby Warren Meierbachtol, Jesse Johnson, Joel T. Harper
Sensitivity Of The Frozen/Melted Basal Boundary To Perturbations Of Basal Traction And Geothermal Heat Flux : Isunnguata Sermia, Western Greenland, Douglas John Brinkerhoff, Toby Warren Meierbachtol, Jesse Johnson, Joel T. Harper
Computer Science Faculty Publications
A full-stress, thermomechanically coupled, numerical model is used to explore the interaction between basal thermal conditions and motion of a terrestrially terminating section of the west Greenland ice sheet. The model domain is a two-dimensional flowline profile extending from the ice divide to the margin. We use data-assimilation techniques based on the adjoint model in order to optimize the basal traction field, minimizing the difference between modeled and observed surface velocities. We monitor the sensitivity of the frozen/melted boundary (FMB) to changes in prescribed geothermal heat flux and sliding speed by applying perturbations to each of these parameters. The FMB …
Modeling 5 Years Of Subglacial Lake Activity In The Macayeal Ice Stream (Antarctica) Catchment Through Assimilation Of Icesat Laser Altimetry, Sasha P. Carter, Helen A. Fricker, Donald D. Blankenship, Jesse V. Johnson, William Lipscomb, Stephen F. Price, Duncan A. Young
Modeling 5 Years Of Subglacial Lake Activity In The Macayeal Ice Stream (Antarctica) Catchment Through Assimilation Of Icesat Laser Altimetry, Sasha P. Carter, Helen A. Fricker, Donald D. Blankenship, Jesse V. Johnson, William Lipscomb, Stephen F. Price, Duncan A. Young
Computer Science Faculty Publications
Subglacial lakes beneath Antarctica’s fast-moving ice streams are known to undergo ~1km3 volume changes on annual timescales. Focusing on the MacAyeal Ice Stream (MacIS) lake system, we create a simple model for the response of subglacial water distribution to lake discharge events through assimilation of lake volume changes estimated from Ice, Cloud and land Elevation Satellite (ICESat) laser altimetry. We construct a steady-state water transport model in which known subglacial lakes are treated as either sinks or sources depending on the ICESat-derived filling or drainingrates. The modeled volume change rates of five large subglacial lakes in the downstream portion …
High-Resolution Study Of Layering Within The Percolation And Soaked Facies Of The Greenland Ice Sheet, Joel Brown, Joel T. Harper, W. Tad Pfeffer, Neil Humphrey, John H. Bradford
High-Resolution Study Of Layering Within The Percolation And Soaked Facies Of The Greenland Ice Sheet, Joel Brown, Joel T. Harper, W. Tad Pfeffer, Neil Humphrey, John H. Bradford
Geosciences Faculty Publications
Within the percolation and soaked facies of the Greenland ice sheet, the relationship between radar-derived internal reflection horizons and the layered structure of the firm column is unclear. We conducted two small-scale ground-penetrating radar (GPR) surveys in conjunction with 10 m firm cores that we colleced within the percolation and soaked facies of the Greenland ice sheet. The two surveys were separated by the distance of about 50 km and about 340 m of elevation leading to about 40 days of difference in the duration of average annual melt. At the higher site (about 1997 ma.s.l.), which receives less melt, …
Montana Kaimin, November 17, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, November 17, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Montana Kaimin, November 15, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, November 15, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Minutes From The November 10, 2011 Meeting Of The University Of Montana Faculty, University Of Montana--Missoula. Faculty
Minutes From The November 10, 2011 Meeting Of The University Of Montana Faculty, University Of Montana--Missoula. Faculty
University of Montana Faculty Senate Meeting Minutes
Meeting minutes from the November 10, 2011 meeting of the University of Montana faculty.
Minutes From The October 13, 2011 Meeting Of The University Of Montana Faculty, University Of Montana--Missoula. Faculty
Minutes From The October 13, 2011 Meeting Of The University Of Montana Faculty, University Of Montana--Missoula. Faculty
University of Montana Faculty Senate Meeting Minutes
Meeting minutes from the October 13, 2011 meeting of the University of Montana faculty.
Montana Kaimin, October 13, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, October 13, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Montana Kaimin, October 11, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, October 11, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Department Of Mathematical Sciences Newsletter, Fall 2011, University Of Montana--Missoula. Department Of Mathematical Sciences
Department Of Mathematical Sciences Newsletter, Fall 2011, University Of Montana--Missoula. Department Of Mathematical Sciences
Newsletters from the Department of Mathematical Sciences at UM
George McRae: the 50 Year Anniversary / Jim Hirstein -- Rick Billstein Retires -- Remembering Sangadji -- Notes from the Chair / Leonid Kalachev -- Math Camp Provides UM Math Students with Middle School Teaching Experience / Bonnie Spence -- Jon Graham Wins Distinguished Teaching Award / John Bardsley -- Former Student Publishes book with the MAA / Greg St. George -- A Glimpse of East China Normal University / Solomon W. Harrar -- Alumni Reply Form -- Emma Celebrates 100th Birthday
Contributors, About Cutbank, Colophon, Back Cover
Current Unrestricted Operating Budgets, Fiscal Year 2012, University Of Montana--Missoula. Office Of Administration And Finance
Current Unrestricted Operating Budgets, Fiscal Year 2012, University Of Montana--Missoula. Office Of Administration And Finance
University of Montana Current Unrestricted Operating Budgets, 1993-2017
The unrestricted operating budget of the University of Montana, issued by the Office of University Planning, Budgeting and Analysis under the Office of Administration and Finance.
Montana Kaimin, September 8, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, September 8, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Wbio 105.01: Wildlife And People, Daniel Croft Barton
Wbio 105.01: Wildlife And People, Daniel Croft Barton
University of Montana Course Syllabi
No abstract provided.
2011 Grizzly Football Yearbook, University Of Montana--Missoula. Athletics Department
2011 Grizzly Football Yearbook, University Of Montana--Missoula. Athletics Department
Grizzly Football Yearbook, 1939-2018
Annual yearbook of the University of Montana’s Athletics Department. This volume covers the period from fall 2011 through spring 2012.
September 2011 News Releases, University Of Montana--Missoula. Office Of University Relations
September 2011 News Releases, University Of Montana--Missoula. Office Of University Relations
University of Montana News Releases, 1928, 1956-present
No abstract provided.
The Nucleotide Exchange Factor Ric-8a Is A Chaperone For The Conformationally Dynamic Nucleotide-Free State Of G Alpha I1, Celestine J. Thomas, Klara Briknarova, Jonathan K. Hilmer, Navid Movahed, Brian Bothner, John P. Sumida, Gregory G. Tall, Stephen R. Sprang
The Nucleotide Exchange Factor Ric-8a Is A Chaperone For The Conformationally Dynamic Nucleotide-Free State Of G Alpha I1, Celestine J. Thomas, Klara Briknarova, Jonathan K. Hilmer, Navid Movahed, Brian Bothner, John P. Sumida, Gregory G. Tall, Stephen R. Sprang
Chemistry and Biochemistry Faculty Publications
Heterotrimeric G protein alpha subunits are activated upon exchange of GDP for GTP at the nucleotide binding site of G alpha, catalyzed by guanine nucleotide exchange factors (GEFs). In addition to transmembrane G protein-coupled receptors (GPCRs), which act on G protein heterotrimers, members of the family cytosolic proteins typified by mammalian Ric-8A are GEFs for Gi/q/12/13-class G alpha subunits. Ric-8A binds to G alpha.GDP, resulting in the release of GDP. The Ric-8A complex with nucleotide-free G alpha i1 is stable, but dissociates upon binding of GTP to G alpha i1. To gain insight into the mechanism of Ric-8A-catalyzed GDP release …
August 2011 News Releases, University Of Montana--Missoula. Office Of University Relations
August 2011 News Releases, University Of Montana--Missoula. Office Of University Relations
University of Montana News Releases, 1928, 1956-present
No abstract provided.
Quantifying The Flux Of Caco3 And Organic Carbon From The Surface Ocean Using In Situ Measurements Of O-2, N-2, Pco(2), And Ph, Steven Emerson, Christopher Sabine, Meghan F. Cronin, Richard Feely, Sarah E. Cullison Gray, Michael Degrandpre
Quantifying The Flux Of Caco3 And Organic Carbon From The Surface Ocean Using In Situ Measurements Of O-2, N-2, Pco(2), And Ph, Steven Emerson, Christopher Sabine, Meghan F. Cronin, Richard Feely, Sarah E. Cullison Gray, Michael Degrandpre
Chemistry and Biochemistry Faculty Publications
Ocean acidification from anthropogenic CO2 has focused our attention on the importance of understanding the rates and mechanisms of CaCO3 formation so that changes can be monitored and feedbacks predicted. We present a method for determining the rate of CaCO3 production using in situ measureme nts of fCO(2) and pH in surface waters of the eastern subarctic Pacific Ocean. These quantities were determined on a surface mooring every 3 h for a period of about 9 months in 2007 at Ocean Station Papa (50 degrees N, 145 degrees W). We use the data in a simple surface ocean, mass balance …
Research On Practical Rationality: Studying The Justification Of Actions In Mathematics Teaching, Patricio Herbst, Daniel Chazan
Research On Practical Rationality: Studying The Justification Of Actions In Mathematics Teaching, Patricio Herbst, Daniel Chazan
The Mathematics Enthusiast
Building on our earlier work conceptualizing teaching as the management of instructional exchanges, we lay out a theory of the practical rationality of mathematics teaching—that is, a theory of the grounds upon which instructional actions specific to mathematics can be justified or rebuffed. We do that from a perspective informed by what experienced practitioners consider viable but also in ways that suggest operational avenues for the study of instructional improvement, in particular for improvements that enable students to do more authentic mathematical work. We show how different kinds of experiments can be used to engage in theory building and provide …
Complex Learning Through Cognitively Demanding Tasks, Lyn D. English
Complex Learning Through Cognitively Demanding Tasks, Lyn D. English
The Mathematics Enthusiast
The world’s increasing complexity, competitiveness, interconnectivity, and dependence on technology generate new challenges for nations and individuals that cannot be met by “continuing education as usual” (The National Academies, 2009). With the proliferation of complex systems have come new technologies for communication, collaboration, and conceptualization. These technologies have led to significant changes in the forms of mathematical thinking that are required beyond the classroom. This paper argues for the need to incorporate future-oriented understandings and competencies within the mathematics curriculum, through intellectually stimulating activities that draw upon multidisciplinary content and contexts. The paper also argues for greater recognition of children’s …
Conceptualizations And Issues Related To Learning Progressions, Learning Trajectories, And Levels Of Sophistication, Michael T. Battista
Conceptualizations And Issues Related To Learning Progressions, Learning Trajectories, And Levels Of Sophistication, Michael T. Battista
The Mathematics Enthusiast
In this paper the nature of learning progressions and related concepts are discussed. The notions of learning progressions and learning trajectories are conceptualized and their usage is illustrated with the help of examples. In particular the nuances of instructional interventions utilizing these concepts are also discussed with implications for the teaching and learning of mathematics.
On The Idea Of Learning Trajectories: Promises And Pitfalls, Susan B. Empson
On The Idea Of Learning Trajectories: Promises And Pitfalls, Susan B. Empson
The Mathematics Enthusiast
Learning mathematics is a complex and multidimensional if not an inherently indeterminate process. A necessary goal of research on learning is to simplify this complexity without sacrificing the ability of research to inform teaching. This goal has been addressed in part by researchers focusing on how to represent research on learning for teachers and on how to support teachers to use and generate models of students’ learning (e.g., Franke, Carpenter, Levi, & Fennema, et al., 2001; Hammer & Schifter, 2001; Simon & Tzur, 2004; Steffe, 2004). Recently, the idea of learning trajectories has gained attention as a way to focus …
Can Dual Processing Theories Of Thinking Inform Conceptual Learning In Mathematics?, Ron Tzur
Can Dual Processing Theories Of Thinking Inform Conceptual Learning In Mathematics?, Ron Tzur
The Mathematics Enthusiast
Concurring with Uri Leron’s (2010) cross-disciplinary approach to two distinct modes of mathematical thinking, intuitive and analytic, I discuss his elaboration and adaptation to mathematics education of the cognitive psychology dual-processing theory (DPT) in terms of (a) the problem significance and (b) features of the theory he adapts. Then, I discuss DPT in light of a constructivist stance on the inseparability between thinking and learning. In particular, I propose a brain-based account of conceptual learning—the Reflection on Activity-Effect Relationship (Ref*AER) framework—as a plausible alternative to DPT. I discuss advantages of the Ref*AER framework over DPT for mathematics education.
Practical Rationality, The Disciplinary Obligation, And Authentic Mathematical Work: A Look At Geometry, Deborah Moore-Russo, Michael Weiss
Practical Rationality, The Disciplinary Obligation, And Authentic Mathematical Work: A Look At Geometry, Deborah Moore-Russo, Michael Weiss
The Mathematics Enthusiast
Grossman and McDonald (2008) recently argued that the research community needs to move its “attention beyond the cognitive demands of teaching … to an expanded view of teaching that focuses on teaching as a practice (p. 185).” Building on the work of Bourdieu (Bourdieu and Wacquent, 1992; Bourdieu, 1985, 1998), Herbst and Chazan (2003, 2006) have written about mathematics teaching as a practice, just as law and medicine are considered practices, in an attempt to better understand the rationality that produces, regulates, and sustains mathematics instruction. This practical rationality is the commonly held system of dispositions or the “feel for …
Editorial: “Glocal”, “Glocavores”: Good Gadgetry?, Bharath Sriraman
Editorial: “Glocal”, “Glocavores”: Good Gadgetry?, Bharath Sriraman
The Mathematics Enthusiast
No abstract provided.