103 research outputs found
L’écriture de l’histoire de l’Orient ancien
No full textAfter introducing to the evolution of the oriental studies during the 19th century, the author presents the principles of the comparative method initiated by the Annales School. The article also gives two examples of how this method is applied to the myths of human immortality and of creation
Evaluation of subdivision methods used in octree ray tracing algorithms
No full textThe non-uniform spatial subdivision technique refined by Andrew Glassner [Glassner 1984] minimizes facet intersection tests (i) by automatically generating a density dependent spatial hierarchy of facet regions (called an octree) and (ii) by only testing facets in regions along the path of the ray. Past research has addressed optimization of the octree ray tracing process by separately improving both the octree traversal method and facet intersection algorithms. This author attempted to further improve the overall approach by attempting to identify new octree construction methods that would decrease the number of traversals required to render the scene. This research focused on the subdivision technique used in constructing the octree. The conventional Glassner algorithm utilizes cubic octants that can result in a large population of empty octants when rendering scenes containing localized regions with high facet density. Sparse octrees (containing significant numbers of empty octants) were believed to hinder performance of the facet traversal algorithm. As an alternative to the conventional cubic algorithm, the performance benefits of non-cubic octants were investigated. Octrees constructed with rectangular octants which more closely bound the scene were tested as one alternative to the cubic octants method. As a second alternative, this author proposed and implemented an ideal-cut subdivision algorithm that subdivides the parent octant through the mean location of the facets contained in the octant. For the scenes tested, the conventional cubic algorithm was shown to perform better than either alternative method, although, it was also shown to suffer from memory and run-time explosions on some scenes. The rectangular octant algorithm consistently approached the run-times produced by the cubic method. Since, the rectangular method defaults to the cubic method for scenes with 1:1:1 aspect ratios, the rectangular method must be considered as a reasonable alternative in rendering applications. The idealcu
Go Fish: An Analysis Of Economic Rents In Panamanian Fisheries Against Ecosystem Service Values
No full textGlobal demand of fish for consumption in developing nations is expected to continue to rise in the near future, putting pressure on stocks that are already overexploited. In the territorial waters of Panama there is a constant struggle between commercial vessels with high yield, subsistence fishermen trying to feed a remote village, and ecosystem services struggling to sustain themselves. These services are the direct and indirect benefits received by the population in the form of food, raw materials, nutrient cycling, and disaster regulation. They are being degraded by illegal and unregulated fishing, bottom trawlers raking the benthos and destroying coral reefs, longlines responsible for thousands of sea turtle and bird deaths, and purse seines that decrease species biodiversity in fish stock. While the government has passed laws to reduce the environmental impact the industrial fisheries have, they lack effective enforcement. An alternative approach is to place monetary values on ecosystem services to show the monetary value of previously unrepresented natural capital. Application of this method to fisheries management can educate policy makers on the economic losses to expect if overfishing of the seas continues and provide the economic imperative to lessen impacts on oceanic ecosystems. Through comparative analysis it is shown that the market value of all fish catch in Panamanian waters is less than that which is provided by the ecosystem services in the area. Open ocean and coral reef ecosystem services provide a combined 356 million in 2004. There is an economic and political imperative to protect and promote sustainability of not only the fish stock, but all ecosystem services in the ocean
Jones Junior High School sixth grade students, Toledo, Ohio, 1967
No full textTerms associated with the photograph are: Jones Junior High School (Toledo, Ohio) | junior high schools | class portraits | 1967-1968 | sixth grade | students | Hardy, Clyde | Harris, Joyce | Worstell, John | Harris, Rose | Barnhill, Sheila | Latimer, Dukie | McKind, Shirley | Miller, David | Loper, Melinda | Miller, Ralph | Smith, Carl | Gonzalez, Eusebia | Latimer, Chris | Flores, Christina | Elizardo, Mark | Ducatt, Joann | Glassner, Kim | Lawson, Lionel | Gartee, Debbie | May, Bud | Meyers, Louella | Lenix, Jeff | Starks, Vicki | Brown, Lynn | Caro, Mario | Torres, Juanita | Urbina, Leonard | Snyder, Judy | Kokinsparger, Richard | Greer, Nita | teachers | Sheline, Eugene Richard | Brimmer, Walte
Process analysis of the aqueous fractionation of tallow
No full textThesis (M.S.)--Michigan State University. Department of Chemical Engineering, 1983Includes bibliographical references (pages 79-80
Questions mésopotamiennes sur la divination
No full textMesopotamian questions on divination
The author prepares the ground for a comparative approach to Chinese and Mesopotamian divination : motivations of the invention of writing, writing as a range of techniques apt to create new possibilities of social action, the respective roles of the king and the exorcist, divination and multiple rationalities, divination and the writing of history.Quelques jalons pour une approche comparative des divinations chinoises et mésopotamiennes : mobiles de l'invention de l'écriture, l'écriture comme gamme de techniques aptes à créer des possibilités nouvelles d'action sociale, rôles respectifs du roi et de l'exorciste, divination et rationalités multiples, divination et écriture de l'histoire.Glassner Jean-Jacques. Questions mésopotamiennes sur la divination. In: Extrême-Orient, Extrême-Occident, 1999, n°21. Divination et rationalité en Chine ancienne, sous la direction de Karine Chemla, Donald Harper et Marc Kalinowski. pp. 147-154
Corn Stover Potential: Recasting the Corn Sweetener Industry
No full textCorn stover is by far the largest single available biomass not being used, representing more than one-third of the total waste, including municipal solids. An estimated 200 million dry tonnes (t) remain each year as aboveground residue. THE CORN STOVER ISSUE The corn sweetener industry is based on processing corn grain (maize), creating value-added products such as glucose, dextrose, and fructose. Conversion of corn stover to sugars has been stymied for years due to cost. Environmental benefits, wider adaptation of sustainable farming practices and the relentless improve-ments in biotechnology are expected to overcome the economic hurdle within the next five years and recast the corn sweetener industry. The corn stover industry uses about 8 % of the corn crop (20 million t) in 1997; the fuel ethanol industry used about 13 million t (515 million bu). These combined demands equal 13 % of domestic demand for corn. Corn stover consists of the stalks, leaves, and cobs remaining aboveground after the corn kernels are harvested. About 1 kg of stover is produced per kg of grain. In 1997 about 200 million dry t of stover was produced. The mass of stover increases with the yield of the corn-expected to increase 1 % to 2 % annually More than 90 % of the stover is left in the fields. Less than 1 % of corn stover is collected for industria
The effects of surfactant concentration and crystal size on the olein yield from the detergent fractionation of tallow
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