20,651 research outputs found
Impact of varying analytical methodologies on grain particle size determination
No full textCitation: Kalivoda, J. R., Jones, C. K., & Stark, C. R. (2017). Impact of varying analytical methodologies on grain particle size determination. Journal of Animal Science, 95(1), 113-119. doi:10.2527/jas2016.0966The determination of particle size is an important quality control measurement for feed manufacturers, nutritionists, and producers. The current approved method for determining the geometric mean diameter by weight (d(gw)) and geometric standard deviation (S-gw) of grains is standard ANSI/ASAE S319.4. This method controls many variables, including the suggested quantity of initial material and the type, number, and size of sieves. However, the method allows for variations in sieving time, sieve agitators, and the use of a dispersion agent. The objective of this experiment was to determine which method of particle size analysis best estimated the particle size of various cereal grain types. Eighteen samples of either corn, sorghum, or wheat were ground and analyzed using different variations of the approved method. Treatments were arranged in a 5 x 3 factorial arrangement with 5 sieving methods: 1) 10-min sieving time with sieve agitators and no dispersion agent, 2) 10-min sieving time with sieve agitators and dispersion agent, 3) 15-min sieving time with no sieve agitators or dispersion agent, 4) 15-min sieving time with sieve agitators and no dispersion agent, and 5) 15-min sieving time with sieve agitators and dispersion agent conducted in 3 grain types (ground corn, sorghum, and wheat) with 4 replicates per treatment. The analytical method that resulted in the lowest dgw and greatest Sgw was considered desirable because it was presumably representative of increased movement of particles to their appropriate sieve. Analytical method affected dgw and Sgw (P 0.05), but wheat ground using the same mill parameters was 120 to 104 m larger (P = 0.05) than corn and sorghum, respectively. Both sieve agitators and dispersion agent should be included when conducting particle size analysis. The results indicate that 10 and 15 min of sieving time produced similar results
Cooperation and Wealth
No full textWe calculate the equilibrium fraction of cooperators in a population in which payoffs accrue from playing a single-shot prisoner’s dilemma game. Individuals who are hardwired as cooperators or defectors are randomly matched into pairs, and cooperators are able to perfectly find out the type of a partner to a game by incurring a recognition cost. We show that the equilibrium fraction of cooperators relates negatively to the population’s level of wealth.Equilibrium fraction of cooperators, Population's level of wealth, Single-shot prisoner's dilemma game
Malcolm Stark Correspondence
No full textEntries include typed correspondence on The Camden Herald Publishing Company stationery concerning the whereabouts of Mr. Stark, a handwritten letter from Stark on plain paper, and a typed letter on receipt of the Maine poet\u27s book Way Out and Close About for the Maine Author Collection
Inequality and Migration: A Behavioral Link
No full textWe provide an analytical-behavioral explanation for the observed positive relationship between income inequality, as measured by the Gini coefficient, and the incentive to migrate. We show that a higher total relative deprivation of a population leads to a stronger incentive to engage in migration for a given level of a population’s income; that total relative deprivation is positively related to the Gini coefficient; and that, consequently, the Gini coefficient and migration are positively correlated, holding the population’s income constant.Income inequality, Relative deprivation, The Gini coefficient, The incentive to migrate
Asymmetric stark shifts of exciton in InAs/GaAs pyramidal quantum dots
No full textWithin the framework of the single-band effective-mass envelope-function theory, the effect of electric field on the electronic structures of pyramidal quantum dot is investigated. Taking the Coulomb interaction between the heavy holes and electron into account, the quantum confined Stark shift of the exciton as functions of the strength and direction of applied electric field and the size of the quantum dot are obtained. An interesting asymmetry of Stark shifts around the zero field is found. (C) 1997 Elsevier Science Ltd
Kamimuria gressitti Stark & Sivec 2013, sp. nov.
No full textKamimuria gressitti, sp. nov. (Figs. 1-8) Material examined. Holotype ♂ and paratype ♀ from CHINA, W. Hupeh (Hubei Province), Lichuan District, Suisapa, 1000 m, 23 August 1948, J.L. Gressitt, Djou (California Academy of Sciences). Adult Habitus. Three ocelli. Color pattern apparently pale brown, without distinctive pattern, but obscured by specimen condition. Wings pale, veins pale amber. Male. Forewing length 20.5 mm. Hemitergal lobes slender, finger-like, bluntly rounded at the apex and bearing a small patch of sensilla basiconica along ventroapical margins (Figs. 1-2); hemitergal lobes meet in median field of tergum 10 in dorsal aspect, and approach anterior margin of tergum 10; in lateral aspect a slight ventral swelling occurs near midlength of hemitergal lobes (Fig. 2). Tergum 9 with a median patch of sensilla basiconica; sterna 4-6 with well developed hair brushes. Aedeagus membranous, relatively straight, but constricted subapically, near midlength, and at base of aedeagal tube (Fig. 4); armature extensive on subapical sac portion, consisting of a circular band of sharp, triangular spines; band narrowly divided medially on dorsal surface and more broadly on ventral surface; fine microtrichia occur in a pair of apicolateral patches (Figs. 3-4) and similar patches occur ventrally on the middle tube section (Fig. 5) and ventrally on the basal envelope section (Fig. 5). Female. Forewing length 22 mm. Subgenital plate a short, triangular projection, barely reaching the anterior margin of sternum 9 (Fig. 6), and bearing a small median notch. Vagina membranous but partially lined with pale setae around wide posterior section at gonopore; anterior section slightly narrower from midlength, and bearing a prominent, balloon-like spermatheca on a slender stalk (Fig. 7). Egg. Length ca. 0.41 mm, width ca. 0.24 mm. Somewhat barrel shaped with short, wide, slightly flanged collar (Fig. 8). Chorion smooth. Larva. Unknown. Etymology. The patronym honors the late J. Linsley Gressitt, distinguished Coleopterist and Naturalist, director of the “Dawn Redwood Expedition”, and co-collector of the type series of this species. Diagnosis. The aedeagal armature size and general aedeagal shape is somewhat similar to that of K. similis Klapálek (Sivec & Stark 2008), however the new species lacks the enlarged pair of dorsal spines found in K. similis, and the hemitergal lobes of the latter species bear an abrupt subapical notch not found in the new species. There is also a general similarity with K. atrocephala Sivec & Stark, however that species has a more extensive patch of lateral spines along the aedeagal tube and sac, and a small patch of sensilla basiconica on tergum 8. Unfortunately, the provisional key in Sivec & Stark (2008) is based, in part, on pigment patterns and is therefore, unsuitable for specimens like these which have obscure pigmentation.Published as part of Stark, Bill P. & Sivec, Ignac, 2013, Kamimuria Gressitti, A New Stonefly Species From China (Plecoptera: Perlidae), And New Records Of K. Atra From Vietnam, pp. 116-121 in Illiesia 9 (11) on pages 119-120, DOI: 10.5281/zenodo.475330
J. K. Stark. Personal Names in Palmyrene Inscriptions
No full textCaquot André. J. K. Stark. Personal Names in Palmyrene Inscriptions. In: Revue de l'histoire des religions, tome 182, n°2, 1972. pp. 200-202
SUBMILLIMETER LASER STARK SPECTROSCOPY OF
No full textAuthor Institution: Department of Physics, University of IdahoA Laser Stark spectrum has been observed for fully deuterated Amonia () with the line of the DCN laser up to Stark fields of about 58000 V/cm. The rotation-inversion spectra were taken for both parallel and perpendicular polarizations and three distinct families, one above the laser line and two below the laser line, were observed. Tentative identification of the family above the laser line is and those below the laser frequency are
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