2,020 research outputs found
Recent Results on Nonlinear Elliptic Free Boundary Problems
No full textIn this paper we give an overview of some recent and older results concerning free boundary problems governed by elliptic operators
Stop the Century--We’re Not Ready!
No full textThe distinguished Nobel Laureate and contributing author of the newly released Science Literacy for the Twenty-first Century and author of The God Particle will explore how science and technology serve as the drivers for 21st Century changes in our social, political and economic lives. Profits and conveniences made by deployment of new knowledge force the issue of whether such deployment is in society’s best long-term interest. The need grows exponentially for the voting public in our democratic society to play a significant role in making decisions. Lederman discusses whether we can devise a feasible educational system that will produce high school graduates with a sense of how science works, as well as whether voter-citizens can employ a “science way of thinking” in order to participate in issues affecting their lives and those of their children.
The lecture will be followed by a proclamation from Mike McCoy, Chairman of the Kane County Board: The Kane County “Dr. Leon Lederman Day” and a book launch, refreshments and signing of Science Literacy for the Twenty-first Century
Nancy S. Jecker, Zohar Lederman, and Anita Ho reply
No full textThis letter replies to the letter "Colonial and Neocolonial Barriers to Companion Digital Humans in Africa," by Luís Cordeiro-Rodrigues, in the same, May-June 2024, issue of the Hastings Center Report. </p
International collaborative follow-up investigation of graduating high school students’ understandings of the nature of scientific inquiry: is progress Being made?
No full textUnderstandings of the nature of scientific inquiry (NOSI), as opposed to engaging students in inquiry learning experiences, are included in science education reform documents around the world. However, little is known about what students have learned about NOSI during their pre-college school years. The purpose of this large-scale follow-up international project (i.e. 32 countries and regions, spanning six continents and including 3917 students for the high school sample) was to collect data on what exiting high school students have learned about NOSI. Additionally, the study investigated changes in 12th grade students’ NOSI understandings compared to seventh grade (i.e. 20 countries and regions) students’ understandings from a prior investigation [Lederman et al. (2019). An international collaborative investigation of beginning seventh grade students’ understandings of scientific inquiry: Establishing a baseline. Journal of Research in Science Teaching, 56(4), 486–515. https://doi.org/10.1002/tea.21512]. This study documents and discusses graduating high school students’ understandings and compares their understandings to seventh grade students’ understandings of the same aspects of scientific inquiry for each country. It is important to note that collecting data from each of the 130+ countries globally was not feasible. Similarly, it was not possible to collect data from every region of each country. A concerted effort was made, however, to provide a relatively representative picture of each country and the world.No Full Tex
The business of product innovation : international empirical evidence
No full textIt is so widely recognized that innovation is a key driver of economic growth that it is cliché to say so. This article studies product innovation by firms with data from 68 countries, covering more than 25,000 firms in eight manufacturing sectors. The author assesses the predictions of inter-disciplinary research on innovation by firms. The econometric evidence suggests that globalization and local knowledge increase the likelihood that firms will introduce new products. By contrast, domestic regulatory impediments to competition are not robustly correlated with product innovation.E-Business,Innovation,Microfinance,Education for Development (superceded),Statistical&Mathematical Sciences
Toward inclusion of all learners through science education
No full textPresentation co-presented by Georgia Southern faculty member Lacey D. Huffling with Sami Kahn, Michele Koomen, Terri Hebert, S. Burgstahler, Judith Lederman, Jonte’ Taylor, Kevin Fleming, and Selina Bartels at National Science Teachers’ Association Conference, Atlanta, GA
Reaching for the American Dream: Economic Policy for the Future
No full textLeague of Women Voters production \u27Reaching for the American Dream: Economic Policy for the Future\u27 as part of its \u27Understanding U.S. Economic Policy\u27 project. Topics discussed include the United States economy and planning for the future; the federal budget deficit; and how citizens can participate in economic decisions. Dr. Susan S. Lederman, Chair of the League of Women Voters Education Fund concludes the program; Reaching for the American Dream: Economic Policy for the Future League of Women Voters Education Fund 18:00; Restricted use
Sexual Risk Behavior May Be Associated with T-Helper-Cell Response to HIV-1 Peptides in HIV− and HIV+ Men
No full textThe production of interleukin-2 by in vitro T helper cells in response to synthetic peptides from the envelope of HIV-1 ("peptide response") has been shown in both HIV-exposed HIV-seronegative (HIV-) and HIV-seropositive (HIV+) homosexual men. In this exploratory study, we examine the association of peptide response with sexual risk behavior and indicators of HIV disease progression in 21 HIV- and 17 HIV+ homosexual men examined in the third and fourth years of a natural history project of HIV disease in New York City. Preproject risk behaviors were associated with HIV status only. During-project risk behaviors were associated with peptide response only. There were no significant HIV Status x Peptide Response interactions. In HIV+ men, one of several disease-progression indicators also contributed. Thus, in our sample peptide response appears to reflect relatively recent exposure to HIV-1 by way of sexual risk behavior in both HIV-exposed HIV- and HIV+ men, and, in HIV+ men additionally, immunologieal impairment by disease progression
An inhomogeneous singular perturbation problem for the p(x)-Laplacian
No full textIn this paper we study the following singular perturbation problem for the pϵ(x)-Laplacian: Δpϵ (x)uϵ:=div(|∇uϵ(x)|pϵ (x)-2∇ uϵ)=βϵ(uϵ)+fϵ,uϵ≥0, (Pϵ(fϵ, pϵ)) where ϵ>0, βϵ(s)=1/ϵβ(s/ϵ), with β a Lipschitz function satisfying β>0 in (0,1), β≡0 outside (0,1) and ∫β(s)ds=M. The functions uϵ, fϵ and pϵ are uniformly bounded. We prove uniform Lipschitz regularity, we pass to the limit (ϵ→0) and we show that, under suitable assumptions, limit functions are weak solutions to the free boundary problem: u≥0 and {Δp(x)u = f in {u>0}u=0,|∇u|=λ ∗(x)on ∂{u>0} (P(f, p, λ∗)) with λ∗ (x)=(p(x)/p(x)-1 M)1/p(x), p = lim pϵ and f = lim fϵ. In Lederman and Wolanski (submitted) we prove that the free boundary of a weak solution is a C1,α surface near flat free boundary points. This result applies, in particular, to the limit functions studied in this paper.Fil: Lederman, Claudia Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Investigaciones Matemáticas "Luis A. Santaló". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Matemáticas "Luis A. Santaló"; ArgentinaFil: Wolanski, Noemi Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Investigaciones Matemáticas "Luis A. Santaló". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Matemáticas "Luis A. Santaló"; Argentin
Symposium – Implications of Inclusive Science Education Research for Pre-service Science Teacher Education
No full textPresentation co-presented by Georgia Southern faculty member Lacey D. Huffling with Sami Kahn, Michele Koomen, Gustavus Adolphus, Kevin Fleming, Bill Lindquist, Judith S. Lederman, Phillip A. Boda, Teresa Shume, and Elaine M. Silva Mangiante.
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