Elementary science textbooks : their contents, text characteristics, and comprehensibility : longitudinal study

Includes bibliographical references (leaves 21-24)Supported in part by a grant from the National Science Foundation, #NSFMDR85-50320, and in part by the National Institute of Education, #400-81-003

Mechanical characterization of solution-derived nanoparticle silver ink thin films

Mechanical properties of sintered silver nanoparticles are investigated via substrate curvature and nanoindentation methods. Substrate curvature measurements reveal that permanent microstructural changes occur during initial heating while subsequent annealing results in nearly elastic behavior of the thinner films. Thicker films were found to crack upon thermal treatment. The coefficient of thermal expansion was determined from linear slopes of curvature curves to be 1.9±0.097 ppm/°C, with elastic modulus and hardness determined via nanoindentation. Accounting for substrate effects, nanoindentation hardness and modulus remained constant for different film thicknesses and did not appear to be a function of annealing conditions. Hardness of 0.91 GPa and modulus of 110 GPa are somewhat lower than expected for a continuous nanocrystalline silver film, most likely due to porosity

Sling Complications

https://digitalscholarship.unlv.edu/wrin_briefs/1003/thumbnail.jp

Surgeon Volume

https://digitalscholarship.unlv.edu/wrin_briefs/1002/thumbnail.jp

The city of Wilmington's Citizens Participation Plan

The original goal of my project was "To develop a strong plan action that would allow for the sustainment of the City of Wilmington's Neighborhood Planning Councils beyond this administration". In April I changed the focus of my project from the sustainment of the NPCs to the Development of the City of Wilmington's Citizen Participation Plan. The Citizens Participation(CP) Plan is being revised for two reasons; 1. It is an HUD requirement to obtain CDBG funding and two. It is part of the Mayors vision of bottom-up government. Presently, under discussion is how the CP Plan can be used for the development of the five-year consolidated plan, as well as, the distribution of the 6.2 million dollars in capital funds for the community. As stated in the thesis project, "In my project contract, I explained that the Neighborhood Planning Councils (NPCS) was the City of Wilmington's community-based initiative. This initiative was in response to the Mayor's vision for the City's neighborhoods to become empowered and to help plan, develop and implement programs, projects and initiatives that will revitalizes their communities in conjunction with City government. The NPCs consist of representation from civic association, block clubs, churches, social service agencies, businesses, and individuals within the boundaries of the NPCs. There are eight NPCs, one for each councilmanic district and the boundaries are the same. The NPCs also have a leadership council. The "Leadership Council" includes the Chair and Co-Chair/President and Vice-President from each of the eight NPCs. It is this leadership group that I am working very closely with for my project. From April until the Present I have accomplished the following: √ collected data from other cities which have citizens (see appendix "a") √ formulated an ad hoc committee from the npc leadership to assist with the development of the plan (see appendix "b") √ have a completed draft of the plan (see appendix "c") √ have presented the draft of the plan to the NPC leadership for review and comments √ have presented the draft of the plan to the Mayor and the Director of Real Estate and Housing We are awaiting approval and/or comments from the NPC Leadership, the Mayor and the Director of Real Estate and Housing. The Mayor's approval is very important to the processes because without it, there will little to no cooperation from the City's Department Heads. A major hurdle we now face is the adoption of the plan by City Council. There are several reasons way the plan needs to be adopted by City Council. One reason is it is a federal regulation from HUD. The second reason is the it will be used for more than the allocations of CDBG dollars. It is our intentions (the community and staff) to have the Plan completed and adopted by City Council by the being of the CDBG funding cycle which starts in late September or early October of 1999." (Library-derived description)Peacock, G. A. (2000). The city of Wilmington's Citizens Participation Plan. Retrieved from http://academicarchive.snhu.eduMaster of Science (M.S.)School of Community Economic Developmen

Placing Colonial Ornithology : Imperial Ambiguities in Upper Canada, 1791- 1841

This paper examines the emergence of colonial ornithology in Upper Canada, 1791-1841, to determine the impact of empire and local contexts on the natural history activity. I argue that colonial ornithology emerged as a by-product of British imperialism that helped to reinforce British, upper- and middle-class, gender-specific white identities through practices of sportsman-hunting, taxidermy, natural theology, and the romantic-aesthetic. However, as this paper reveals, British imperial practices and ideas of ornithology relied on the participation of First Nations and Métis peoples, whose knowledge and skills were instrumental to British naturalists. The First Nations and Métis peoples therefore exerted a real presence in colonial ornithology in Upper Canada—albeit a subservient one in the British ornithological texts—as they positioned themselves as part of the ornithological trade with the collection and trading of specimens. Furthermore, British military officers, settlers, and tourists tapped into American scientific networks and knowledge systems rather than focusing solely on Britain as an imperial centre of accumulation. British imperial ideas and practices of colonial ornithology in Upper Canada therefore remained ambiguous during the early nineteenth century.Cet article examine l’émergence de l’ornithologie coloniale dans le Haut-Canada entre 1791 et 1841 afin de déterminer l’influence des contextes locaux et impériaux sur la pratique de l’histoire naturelle. Je soutiens que l’ornithologie coloniale émerge comme un sous-produit de l’impérialisme britannique et aide ainsi à renforcer les identités blanches, britanniques, et genrées spécifiques aux classes moyennes et élevées par l’entremise de la chasse sportive, de la taxidermie, de la théologie naturelle et de l’esthétique romantique. Toutefois, les pratiques impériales britanniques et les conceptions de l’ornithologie dépendent de la participation des Premières Nations et des métis, dont les connaissances et les habiletés sont instrumentales aux naturalistes britanniques. Les Premières Nations et la population métis exercent donc une présence réelle — bien que subordonnée selon les textes ornithologiques britanniques — dans l’ornithologie coloniale du Haut-Canada, alors qu’elles se situent elles-mêmes comme partie intégrante du commerce ornithologique par la collecte et l’échange de spécimens. De plus, les officiers militaires, colons et voyageurs britanniques intègrent les réseaux scientifiques et les systèmes de connaissances américains au lieu de se concentrer uniquement sur la Grande-Bretagne comme centre impérial d’accumulation. Les idées et les pratiques britanniques impériales en matière d’ornithologie demeurent donc ambiguës au Haut-Canada durant la première partie du 19e siècle

Formation and Equilibrium Properties of Living Polymer Brushes

Polydisperse brushes obtained by reversible radical chain polymerization reaction onto a solid substrate with surface-attached initiators, are studied by means of an off-lattice Monte Carlo algorithm of living polymers (LP). Various properties of such brushes, like the average chain length and the conformational orientation of the polymers, or the force exerted by the brush on the opposite container wall, reveal power-law dependence on the relevant parameters. The observed molecular weight distribution (MWD) of the grafted LP decays much more slowly than the corresponding LP bulk system due to the gradient of the monomer density within the dense pseudo-brush which favors longer chains. Both MWD and the density profiles of grafted polymers and chain ends are well fitted by effective power laws whereby the different exponents turn out to be mutually self-consistent for a pseudo-brush in the strong-stretching regime.Comment: 33 pages, 11 figues, J.Chem. Phys. accepted Oct. 199