Labor Issues; Pittsburgh Politics;Steel Industry; Company Unions; U.S. Steel; Steel Workers Organizing Committee; CIO;Leaflet recruiting Pittsburgh steelworkers to join the Amalgamated Association of Iron, Steel and Tin Workers of North America and describing the injustices of current wages and working conditions.
2009 National Hydrologic Assessment
This site from the Hydrologic Information Center of the National Weather Service discusses the flood risk in the United States. Maps and satellite images support the text. The site also provides information about snow levels, stream flow, soil conditions, forecasts and outlooks.
Phosphorescence lifetime imaging in turbid media
In this dissertation we explore the use of highly scattered photons in an analog of conventional emission tomography. Through this technique we quantitatively reconstruct images of the spatial distribution of oxygen in turbid media. We begin with the mathematical description of diffusive light propagation in highly scattering systems and solve the forward problem. Numerical methods by which the forward problem is inverted are introduced next, enabling quantitative spatial image reconstruction. T
H [infinity symbol]/H2/Kalman filtering of linear dynamical systems via variational techniques with
Filtering of linear dynamical systems has historically been accomplished through the application of the Kalman filter. The Kalman filter has a minimum mean squared error type performance for linear systems with stochastic inputs. In practice, the Kalman filter has been adapter for use with systems outside its usual solution set. For example, the extended Kalman filter for nonlinear systems. While the Kalman filter has been rather successful in general, practical applications have found that mode
Peptide-modified polymer for endothelialization
A functionalized polycarbonate material derived from tyrosine containing varyinglevels of free acid functionality along the backbone, poly(DTE-co-X%DT carbonate), hasbeen functionalized with a peptide to promote endothelial cell attachment and evaluatedas a potential synthetic vascular graft material. Lysine derivatives have been produced topromote the attachment of engineered peptides for promoting endothelialization.NMR has been used to analyze the initial structure of the poly(DTEC-co-X%DTC)
Determination of vertical fluxes of sulfur dioxide and dimethyl sulfide in the remote marine atmosph
Vertical fluxes of dimethyl sulfide (DMS) and sulfur dioxide (SO2) were determined by eddy correlation and an isotopic dilution atmospheric pressure ionization mass spectrometer (APIMS) on an aircraft platform. The sampling frequency of the isotopic dilution APIMS ranged from 1 Hz to 25 Hz for real-time measurements. Measurements were made near the surface in the marine boundary layer to over 6 km in the free troposphere. The APIMS demonstrated an average sensitivity of 80 cps/pptv for DMS and S
Renal, Fall 2007
The major objective of this sequence is for the students to obtain integrated information regarding the structure and function of the renal system, mainly the kidney, by attending lectures and participating in laboratory exercises. By the end of the sequence, we hope that the students will have acquired a working knowledge of: 1) how the various structural components in the kidney are specialized for processing the filtrate and producing urine, 2) what homeostatic mechanisms are involved in the
Lecture 18 - 11/30/2010
Microencapsulation for therapeutic applications
Microencapsulation has proved to be a powerful technique in the field of drug delivery. A great deal of research is directed towards studying the use of various microencapsulation systems for that purpose. This study investigates the use of microencapsulation in alginate for protein delivery and delivery of gene therapy products for the treatment of spinal cord injury. Liposomes were encapsulated in alginate to form a drug delivery system which allows for multiple control points for drug release
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Essential Science for Teachers: Physical Science: Session 2. The Particle Nature of Matter: Solids,
What simple idea links together all of chemistry and physics? How can a close study of the macroscopic differences among solids, liquids, and gases support a microscopic model of tiny, discrete, and constantly moving particles? In this session, participants learn how the "particle model" can be turned into a powerful tool for generating predictions about the behavior of matter under a wide range of conditions.,The segment provides examples of probing questions to find out if the student recogniz
Science In Focus: Energy
Interview with Stephen Connors about limited sources of energy and the importance of using renewable sources.,Interviewee is explaining how the Earth's fossil fuel sources are finite because we are using them faster than we are creating new fossil fuel deposits. He speaks of going immensely to our geologic bank account. This segment only addresses the last sentence of the benchmark.
Space Weather Research Explorer
looks at how the sun creates a changing set of conditions in space. Learn about coronal holes, solar flares, coronal mass ejections, solar wind, magnetosphere, and auroras. See photos, graphs, and live data. Make your own space weather predictions.
Modélisation et perception de l'activité dans l'environnement Symba
Nous présentons dans cet article les travaux de recherche liés à la conception de Symba, un environnement support d'activités collectives en contexte d'apprentissage (ACCA) dont l'objectif est de faire travailler les étudiants sur l'organisation de leur activité. A travers la conception de Symba nous abordons les problématiques du support à la modélisation de l'activité collective par les apprenants, de la perception de l'activité et de la malléabilité de l'environnement.,Proceeding
Science in Focus: Energy
Interview with Dr. Jaci VanHeest about the transfer/transformation of energy, food ordering, and the food chain/web,,Dr. Jaci VanHeest states that heat is generated when using muscles. Targets only first sentence of benchmark.
Faut-il vraiment laisser le déroulement d'une animation sous le contrôle de l'apprenant ?
Grâce aux possibilités technologiques accrues, l'utilisation d'animations dans les documents multimédia à visée technique ou didactique, est devenue un usage courant. Cependant, les études qui ont comparé « toute chose égales par ailleurs » animations et graphiques statiques montrent que le bénéfices des graphiques animés, loin d'être automatique, dépend des dispositifs d'interaction mis à la disposition des utilisateurs. Sur la base de la littérature, nous proposons que l'usage
The Biology course is a first-year course in biology at the high school level. The course emphasizes a multi-representational approach to algebra, with concepts, results, and problems being expressed graphically, analytically, and verbally. The course uses four themes to organize important concepts throughout the course: science, technology, and society; evolution; the relationship between structure and function; and science as a process.
Piecewise Linear Grapher
Highlight the language of domain and range, and the ideas of continuity and discontinuity, with this tool that links symbolic and graphic representations of each interval of a piecewise linear function.
Private Universe Project in Mathematics: Workshop 2. Are You Convinced?
Proof making is one of the key ideas in mathematics. Looking at teachers and students grappling with the same probability problem, we see how two kinds of proofproof by cases and proof by inductionnaturally grow out of the need to justify and convince others.,25 min. Englewood, New JerseyTeachers Workshop Englewood, a town with unsatisfactory student test scores, is implementing a long-term project to improve math achievement. As part of a professional development workshop designed in part
European Heart Journal - My Cardio Interview: Ron Peters & Ulf Landmesser on RESPONSE
Ron Peters in conversation with Ulf Landmesser RESPONSE: Effect of a nurse coordinated prevention program on cardiovascular risk after an acute coronary syndrome: Main results of the RESPONSE trial.