Book Description
The Surveys in Differential Geometry are supplements to the Journal of Differential Geometry, which are published by International Press. They include significant invited papers combining original research and overviews of the most current research in specific areas of interest to the growing Journal of Differential Geometry community.The survey volumes serve as continuing references, inspirations for new research, and introductions to the variety of topics of interest to differential geometers. These supplements are published annually since 1999.

As a service to the mathematics community, the editors of the Journal of Differential Geometry decided to organize a conference to be held every three years. Among the speakers at our first conference were people working in algebraic geometry, mathematical physics and other interesting fields. These speakers are prominent specialists in their respective areas who are able to give a broad overview of recent trends and make predictions and suggestions for future research. We believe that these conferences are important gatherings that inspire experts and non-experts alike. Our first conference was held at Harvard University from April 27-29, 1990, was made possible by the generous funding of the Journal of Differential Geometry. Central to the success of this conference were the speakers who prepared not only two hours' worth of lectures, but also the manuscripts published here. Their lectures were enthusiastically received by several hundred participants. ... Read more

Book Description
This digital document is an article from Journal of Secondary Gifted Education, published by Thomson Gale on June 22, 2005. The length of the article is 8037 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: When do gifted high school students use geometry to solve geometry problems?
Author: Boris Koichu
Publication: Journal of Secondary Gifted Education (Magazine/Journal)
Date: June 22, 2005
Publisher: Thomson Gale
Volume: 16Issue: 4Page: 168(12)

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Book Description
This digital document is an article from Journal of Computers in Mathematics and Science Teaching, published by Association for the Advancement of Computing in Education (AACE) on June 22, 2004. The length of the article is 5730 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Working with accurate representations: the case of preconstructed dynamic geometry sketches.
Author: Margaret Sinclair
Publication: Journal of Computers in Mathematics and Science Teaching (Refereed)
Date: June 22, 2004
Publisher: Association for the Advancement of Computing in Education (AACE)
Volume: 23Issue: 2Page: 191(18)

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Book Description
This digital document is a journal article from Journal of Mathematical Behavior, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
A case study, originally set up to identify and describe some benefits and limitations of using dynamic web-based geometry sketches, provided an opportunity to examine peer interactions in a lab. Since classes were held in a computer lab, teachers and pairs faced the challenges of working and communicating in a lab environment. Research has shown that particular teacher interventions provide motivation for the consideration of new ideas, and help uncover misunderstandings that may interfere with student progress [Towers, J. (1999). In what ways do teachers interventions interact with and occasion the growth of students' mathematical understanding. Doctoral Dissertation, University of British Columbia, Unpublished]. Examples of student discourse presented here suggest that certain peer interactions act in similar ways-helping propel students towards new understanding. On the other hand, they also show that some peer interactions, although superficially similar to teacher interventions, may hamper student progress. . ... Read more

Book Description
This digital document is an article from Journal of Computers in Mathematics and Science Teaching, published by Thomson Gale on December 22, 2006. The length of the article is 6447 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: The impact of virtual manipulatives on first grade geometry instruction and learning.
Author: Kent Steen
Publication: Journal of Computers in Mathematics and Science Teaching (Magazine/Journal)
Date: December 22, 2006
Publisher: Thomson Gale
Volume: 25Issue: 4Page: 373(19)

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Product Description
The Journal of Differential Geometry is devoted to the publication of research papers in differential geometry and related subjects such as differential equations, mathematical physics, algebraic geometry, and geometric topology. ... Read more

Book Description
This digital document is a journal article from Journal of Aerosol Science, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Large spatial-scale atmospheric aerosol characterization is commonly accomplished from high-speed aircraft platforms using subisokinetic sampling. The aspiration efficiencies in these inlets are commonly determined from the empirical correlation of Belyaev and Levin [1974. Techniques for collection of representative aerosol samples. Journal of Aerosol Science, 5, 325-338] (B&L), though the correlation was obtained from experiments under conditions very different from those encountered during high-speed aircraft sampling. Aircraft inlets are generally thick-walled, often have a blunt-body downstream, operate at a large freestream to sampling velocity ratio, and under conditions of low ambient pressures. The dependence of sampling characteristics on these parameters is studied using computational fluid dynamics (CFD) modeling. The CFD calculations show that the anisokinetic inlet sampling characteristics are strongly influenced by the operating conditions and sampler geometry, especially the presence of an aft blunt body. It is observed that these dependencies are not accurately captured by the existing correlations. The presence of even a moderately sized blunt-body aft of a sampling inlet can greatly influence the sampling characteristics of a straight tube inlet. A new correlation is derived based on the CFD simulation results, and this correlation is seen to greatly improve prediction of inlet sampling characteristics considering their geometries. ... Read more

Book Description
This digital document is a journal article from Journal of Aerosol Science, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
This paper presents regional and total deposition measurements in several realistic mouth and throat geometries and demonstrates the effects of intrasubject and intersubject variations in geometry on deposition efficiency. A set of seven geometries that span the range of key dimensions of a larger set of 80 geometries were studied at flow rates of 30 and 90l/min and particle diameters of 3-6.5@mm. The models were obtained using magnetic resonance imaging scans. Gamma scintigraphy and gravimetry were used to determine deposition. The models were subdivided into regions corresponding to the mouth, oropharynx, larynx and trachea. The results indicate that both total and regional deposition exhibit large intersubject differences, but also show some intrasubject difference. A mean equivalent diameter D"m"e"a"n=2V/@pL (where V is mouth-throat volume, L is centerline path length), and corresponding velocity U"m"e"a"n=4Q/@pD"m"e"a"n^2 (where Q is inhalation flow rate) are used as the length and velocity scale in defining a Stokes number, Stk. In addition, an effect on deposition due to flow Reynolds number, Re was noticed. When plotted vs. Stokes number with inclusion of this Reynolds number effect, the total deposition data from all the different geometries collapse onto essentially a single curve, given by: @h=100-100/(11.5Stk^1^.^9^1^2Re^0^.^7^0^7+1) for the parameter range explored, where @h is the percent of inhaled aerosol depositing in the mouth-throat. ... Read more

Book Description
This digital document is a journal article from Journal of Archaeological Science, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
An absence of settlement features during the Central European Corded Ware period (Late Eneolithic, 2900-2300 BC) has been interpreted as a reflection of mobile pastoral subsistence. Recent analyses of the Late Eneolithic archeological context reveal that the Late Eneolithic exhibit evidence of sedentary agricultural activities similar to the Early Bronze Age. Since the archeological analyses are not clear cut, we tested mobility pattern differences between the Late Eneolithic and Early Bronze Age using biomechanical analysis of the tibial midshaft cross-sections. The total sample of the 130 tibiae representing five archaeological cultures was used. The results of the tibial midshaft geometry do not support the hypothesis about different mobility in the Late Eneolithic and Early Bronze Age. This conclusion is supported by nonsignificant differences between the Corded Ware females and the Early Bronze Age females. Higher absolute values for the Corded Ware males should be explained either by stochastic variation or by differing amounts of physical demands despite a generally similar pattern of subsistence of the Late Eneolithic and Early Bronze Age. One of the Early Bronze Age samples, the Wieselburger group, is an exception because the individuals show both reduced overall size and bending resistance of the tibial parameters not only in comparison with the Late Eneolithic but also to the rest of the Early Bronze Age. The results suggest that the behavioral processes which affected the tibial midshaft biology operated during the Late Eneolithic and Early Bronze Age as a mosaic across time and between/within cultures. ... Read more