Physical Sciences and Mathematics Commons^™

Osaka University: A Focus Of Polymer Science: 70th Anniversary Celebration, Otto Vogl, Koichi Hatada

Emeritus Faculty Author Gallery

No abstract provided.

Personalities In Polymer Science: Cover Page, Title Page, Introduction, And List Of Articles, Otto Vogl

Emeritus Faculty Author Gallery

A compilation of articles with short biographies of the scientists who played leading roles in the field and provided the basis of Polymer Science and Technology throughout the 20th century.

Osaka University: A Focus Of Polymer Science: 70th Anniversary Celebration, Otto Vogl, Koichi Hatada

Otto Vogl

No abstract provided.

Personalities In Polymer Science: Cover Page, Title Page, Introduction, And List Of Articles, Otto Vogl

Otto Vogl

A compilation of articles with short biographies of the scientists who played leading roles in the field and provided the basis of Polymer Science and Technology throughout the 20th century.

1. Yukio Imanishi, Otto Vogl

Emeritus Faculty Author Gallery

No abstract provided.

1. Yukio Imanishi, Otto Vogl

Otto Vogl

No abstract provided.

A Study Of Indoor Carbon Dioxide Levels And Sick Leave Among Office Workers, Theodore A. Myatt, John W. Staudenmayer, Kate Adams, Michael Walters, Stephen N. Rudnick, Donald K. Milton

John W Staudenmayer

Background A previous observational study detected a strong positive relationship between sick leave absences and carbon dioxide (CO2) concentrations in office buildings in the Boston area. The authors speculated that the observed association was due to a causal effect associated with low dilution ventilation, perhaps increased airborne transmission of respiratory infections. This study was undertaken to explore this association. Methods We conducted an intervention study of indoor CO2 levels and sick leave among hourly office workers employed by a large corporation. Outdoor air supply rates were adjusted periodically to increase the range of CO2 concentrations. We recorded indoor CO2 concentrations …

18th Annual International Conference On Contaminated Soils, Sediments And Water

Annual Conference on Soils, Sediments and Water: Abstracts

Conference at a Glance Monday, October 21, 2002 Workshops Workshops # 1, 2 & 3 - 10:00 am - 5:00 pm Workshops # 4 & 5 - 1:00 - 5:00 pm 1: The Indoor Air Exposure Pathway from Chlorinated Solvent Contaminated Groundwater 2: Theory and Use of Field Portable X-ray Fluorescence for Soil Analysis 3: In-Situ Chemical Oxidation Workshop 4: Workshop on Current Spectrochemical Techniques for Determining Heavy Metals in Sediments and Soils 5: Practical Remediation of Volatile Organic Compounds in Soil and Groundwater Tuesday, October 22, 2002 Platform Presentations 8:30am-Noon Session 1: Advances in In-Situ Remediation Session 2: Phytoremediation …

2. Toshinobu Higashimura, Otto Vogl

Emeritus Faculty Author Gallery

No abstract provided.

2. Toshinobu Higashimura, Otto Vogl

Otto Vogl

No abstract provided.

A Discrete Nonlinear Model With Substrate Feedback, Panos Kevrekidis, B. A. Malomed, A. R. Bishop

Panos Kevrekidis

We consider a prototypical model in which a nonlinear field (continuum or discrete) evolves on a flexible substrate which feeds back to the evolution of the main field. We identify the underlying physics and potential applications of such a model and examine its simplest one-dimensional Hamiltonian form, which turns out to be a modified Frenkel-Kontorova model coupled to an extra linear equation. We find static kink solutions and study their stability, and then examine moving kinks (the continuum limit of the model is studied too). We observe how the substrate effectively renormalizes properties of the kinks. In particular, a nontrivial …

Meridian Hill Park: The Making Of An American Neoclassical Landscape, Elizabeth Brabec

Landscape Architecture & Regional Planning Faculty Publication Series

The neoclassical design was the dominant design movement in landscape architecture at the turn of the last century, dictating the form and design of public parks for most of the first half of the twentieth century. Meridian Hill Park, located just north of the White ouse in Washington, DC, is considered the most ambitious neoclassical park ever conceived in the United States. The paper provides an overview of the design development of the park, illustrating how classical design precedents were used to create a contemporary neo-classical park.

3. Otto Vogl, Gerald S. Kirshenbaum, Helga Roder

Emeritus Faculty Author Gallery

No abstract provided.

3. Otto Vogl, Gerald S. Kirshenbaum, Helga Roder

Otto Vogl

No abstract provided.

Medusae Fossae Formation: New Perspectives From Mars Global Surveyor, Bethany Bradley, S. E.H Sakimoto, H. Frey, J. R. Zimbelman

Bethany Bradley

The nature and origin of the Medusae Fossae Formation (MFF) on Mars has been debated since the return of the first Viking images. The MFF's young age, distinctive surface texture, and lack of obvious source have prompted multiple hypotheses for its origin. This study uses data from the Mars Global Surveyor (MGS) mission to examine the MFF at all available scales. We discuss and quantify observations from Mars Orbiter Laser Altimeter (MOLA) topography and Mars Orbiter Camera (MOC) images to better constrain the origin of the MFF. Topographic grid estimates yield a present extent of 2.1 × 106 km2 and …

Analogues Of Weyl’S Formula For Reduced Enveloping Algebras, J. E. Humphreys

Mathematics and Statistics Department Faculty Publication Series

In this note we study simple modules for a reduced enveloping algebra Ux (g) in the critical case when X E 2 g^x is “nilpotent”. Some dimension formulas computed by Jantzen suggest modified versions of Weyl’s dimension formula, based on certain reflecting hyperplanes for the affine Weyl group which might be associated to Kazhdan–Lusztig cells.

Review Of Frank Ryan: Tuberculosis: The Greatest Story Never Told, Lynn Margulis

Lynn Margulis (1938 - 2011)

No abstract provided.

On The Minimum Ropelength Of Knots And Links, Jason Cantarella, Robert B. Kusner, John M. Sullivan

Robert Kusner

The ropelength of a knot is the quotient of its length by its thickness, the radius of the largest embedded normal tube around the knot. We prove existence and regularity for ropelength minimizers in any knot or link type; these are C 1,1 curves, but need not be smoother. We improve the lower bound for the ropelength of a nontrivial knot, and establish new ropelength bounds for small knots and links, including some which are sharp.

Impervious Surfaces And Water Quality: A Review Of Current Literature And Its Implications For Watershed Planning, Elizabeth Brabec

Elizabeth Brabec

Impervious surfaces have for many years been recognized as an indicator of the intensity of the urban environment and, with the advent of urban sprawl, they have become a key issue in habitat health. Although a considerable amount of research has been done to define impervious thresholds for water quality degradation, there are a number of flaws in the assumptions and methodologies used. Given refinement of the methodology, accurate and usable parameters for preventative watershed planning can be developed, which include impervious surface thresholds and a balance between pervious and impervious surfaces within a watershed.

Structure Of The Malvenuto-Reutenauer Hopf Algebra Of Permutations (Extended Abstract), Marcelo Aguiar, Frank Sottile

Mathematics and Statistics Department Faculty Publication Series

We analyze the structure of the Malvenuto-Reutenauer Hopf algebra of permutations in detail. We give explicit formulas for its antipode, prove that it is a cofree coalgebra, determine its primitive elements and its coradical filtration and show that it decomposes as a crossed product over the Hopf algebra of quasi-symmetric functions. We also describe the structure constants of the multiplication as a certain number of facets of the permutahedron. Our results reveal a close relationship between the structure of this Hopf algebra and the weak order on the symmetric groups.

Using Small Group Assignments In Teaching Research Ethics, Kenneth D. Pimple

Ethics in Science and Engineering National Clearinghouse

No abstract provided.

Using Short Writing Assignments In Teaching Research Ethics, Kenneth D. Pimple

Ethics in Science and Engineering National Clearinghouse

Regularly asking students to write down their thoughts and reactions to class readings and discussions is an effective method of teaching and assessing student learning. Furthermore, as composition teachers will attest, frequent writing assignments, regardless of content, dramatically improve writing skills. Asking students to think “on paper” about topics encountered in the classroom encourages them to think about those topics in greater depth, relate them to their own lives, and thus connect the classroom to the world outside. I will describe four kinds of useful short writing assignments – freewriting, the non-quiz, the one-minute paper, and logbooks.

Agricultural Land Fragmentation: The Spatial Effects Of Three Land Protection Strategies In The Eastern United States, Elizabeth Brabec, Chip Smith

Elizabeth Brabec

Fragmentation of agricultural land by urban sprawl affects both the agricultural production capacity of the land and its rural scenic quality. In order to assess the resulting fragmentation of the three most common types of agricultural land conservation tools in the United States, this study analyzes the spatial form of three land protection strategies: a purchase of development rights (PDR) program, a clustering program and a transfer of development rights program. By assessing a series of measures of success such as total acreage protected, size of parcels, contiguity and farming status, the study compares the effectiveness of programs that have …

Intersection Cohomology Of Drinfeld‚S Compactifications, A Braverman, M Finkelberg, D Gaitsgory, I Mirkovic

Mathematics and Statistics Department Faculty Publication Series

Let X be a smooth complete curve, G be a reductive group and a parabolic. Following Drinfeld, one defines a (relative) compactification of the moduli stack of P-bundles on X. The present paper is concerned with the explicit description of the Intersection Cohomology sheaf of . The description is given in terms of the combinatorics of the Langlands dual Lie algebra .

Scattering Of A Solitary Pulse On A Local Defect Or Breather, Panayotis G. Kevrekidis, Boris A. Malomed, H. E. Nistazakis, Dimitri J. Frantzeskakis, A. Saxena, A. R. Bishop

Mathematics and Statistics Department Faculty Publication Series

A model is introduced to describe guided propagation of a linear or nonlinear pulse which encounters a localized nonlinear defect, that may be either static or breather-like one. The model with the static defect directly applies to an optical pulse in a long fiber link with an inserted additional section of a nonlinear fiber. A local breather which gives rise to the nonlinear defect affecting the propagation of a narrow optical pulse is possible in a molecular chain. In the case when the host waveguide is linear, the pulse has a Gaussian shape. In that case, an immediate result of …

Lines Tangent To 2n-2 Spheres In R^N, Frank Sottile, Thorsten Theobald

Mathematics and Statistics Department Faculty Publication Series

We show that for n 3 there are 3 · 2n−1 complex common tangent lines to 2n−2 general spheres in Rn and that there is a choice of spheres with all common tangents real.

Spsj 50th Annual Meeting, Osaka, Japan, May 23-25, 2001, Otto Vogl, Yasuhiko Shirota, Tatsuro Ouchi

Emeritus Faculty Author Gallery

No abstract provided.

Department Of Physics Newsletter: Spring 2002, Bob Krotkov, Gerry Peterson, Monroe Rabin

Physics Newsletters

No abstract provided.

Middlefield Open Space And Recreation Project, Center For Economic Development

Center for Economic Development Technical Reports

Over one thousand acres of farmland, open space, and wetlands are converted to residential or commercial development each week in New England. In Massachusetts, nearly two acres of open space land is lost to development every hour. Current development trends suggest that this building pattern, referred to as sprawl, is likely to continue into the near future. Because the negative consequences of sprawl development are highly visible, residents of Massachusetts are becoming increasingly concerned about its impact on their communities. Residents see the unique character of their communities being transformed by uncontrolled residential and commercial development. Green fields and open …

The Usher Plant Review And 8-Point Action Plan, Center For Economic Development

Center for Economic Development Technical Reports

The Usher Plant is located on Arch Street off of Route 2 in Erving, Massachusetts in the center village of the town. The plant is a rich part of the social, economic, and cultural identity of the town and its residents. The Erving Paper Company occupied this plant from 1964 to approximately 1990, when the company consolidated and moved its operations leaving over one-hundred workers either displaced or unemployed and the Usher Plant vacant.

The closing of the Usher Plant approximately 10 years ago has had a tremendous impact on the community residents, as well as Erving's center village merchants …