This study evaluated the production of Inga laurina (Sw.) Willd seedlings in 110 and 280 cm3 tube containers growing doses (0, 3, 6 12 kg m-3) controlled-release fertilizer (CRF) (15-09-12) their performance at 5 months after outplanting. The experiment was conducted using a randomized split-plot design, 2 x 4 arrangement (tube volumes CRF doses). Stabilized sewage sludge from urban origin used...

This study investigates the heat transfer performance of a novel ZA27 metal foam exchanger. An open-celled is combined with thin-walled copper tube in single-step casting process. The between two separated water streams flowing through and foam, respectively, measured compared to an equivalent shell exchanger arrangement. Heat enhancement up 71% rate exceeding 30 kW are observed attributed incr...

Introduction. A pseudoline is formed from a line by stretching the plane without tearing: it is the image of a line under a homeomorphism of the plane [13]. In arrangements of pseudolines, pairs of pseudolines intersect at most once and cross at their intersections. Pseudoline arrangements can be used to model sorting networks [1], tilings of convex polygons by rhombi [4], and graphs that have ...

We generalize the Hadwiger theorem on line transversals to collections of compact convex sets in the plane to the case where the sets are connected and the transversals form an arrangement of pseudolines. The proof uses the embeddability of pseudoline arrangements in topological affine planes. In 1940 Santaló showed [8], by an example, that Vincensini’s proof [9] of an extension of Helly’s theo...

Let G be a graph embedded in the plane and let A be an arrangement of pseudolines intersecting the drawing of G. An aligned drawing of G and A is a planar polyline drawing Γ of G with an arrangement A of lines so that Γ and A are homeomorphic to G and A. We show that if A is stretchable and every edge e either entirely lies on a pseudoline or intersects at most one pseudoline, then G and A have...

Last year W. D. Coolidge and C. N. Moore described a watercooled high voltage X-ray tube which satisfactorily handles as much as 50 milliamperes at 250,000 volts (1). The best high voltage tube on the market before that time could not be used continuously with more than 8 M.A. at 200,000 volts. Thus an X-ray intensity could be obtained with the new tube many times as great as was possible befor...

In the classic picture of morphogen-mediated patterning, cells acquire the correct spatial arrangement of specified fates by reading a precisely distributed gradient of morphogen. Xiong et al. now provide evidence for an alternate strategy-cells of the zebrafish neural tube actively sort to their correct positions following disordered specification by Sonic hedgehog.

Refer to Figure 1. A monotone matching is a set of n segments, each the portion of a unique pseudoline, and each spanning a unique slab, such that the left endpoint of each segment is above the right endpoint of the segment in the previous slab. In addition, the point on the first vertical line is below the left endpoint of the first segment, and the point on the last vertical line is above the...