Matrix Orbit Closures

Let $G$ be the group \GL_r(\CC) \times (\CC^\times)^n. We conjecture that the finely-graded Hilbert series of a $G$ orbit closure in the space of $r$-by-$n$ matrices is wholly determined by the associated matroid. In support of this, we prove that the coefficients of this Hilbert series corresponding to certain hook-shaped Schur functions in the \GL_r(\CC) variables are determined by the matroid, and that the orbit closure has a set-theoretic system of ideal generators whose combinatorics are also so determined. We also discuss relations between these Hilbert series for related matrices

RANCANGAN BETON NORMAL DAN BETON SERAT KELAPA DENGAN PASIR TANAH MERAH SERTA BATU PECAH KUTAI BARAT

Design of Normal Concrete and Concrete Coconut Fibers with Tanah Merah Sand and Crushed Stone Kutai Barat.Final Project Faculty of Civil Engineering Department of the University 17 Agustus 1945 Samarinda.Normal concrete is concrete that has a weight of 2200 - 2500 kg/m3 using natural aggregates were broken or without broken.Fiber-reinforced concrete is a mixture of concrete plus fiber, generally in the form of rods with a size of 5-500 μm with a length of about 25 mm. Fiber material may be asbestos fibers, plastic fibers (polypropylene), or a piece of steel wire. The fibers in concrete prevents cracks that makes concrete more ductile than ordinary concrete. The purpose of this study was to compare the compressive strength value produced normal concrete and fiber-reinforced concrete that uses coarse crushed aggregate of Kampung Keay Kutai Barat and fine aggregate from Tanah Merah North Samarinda.This study uses a mix design method (Indonesian National Standard) SNI 03-2847-2002 conducted in the laboratory using the maximum size of coarse aggregate is 40 mm. The sample used for normal concrete and concrete variation of 0.25% coconut fiber and a variation of 0.5% respectively using 30 samples and the total number of samples is 90 samples.From the test results normal concrete compressive strength at 28 days compressive strength value of the average need (f'cr) is 108.050 and the compressive strength implied (f'c) is 87.987 Kg/Cm2 of the average compressive strength needs to be targeted (f'cr) = 255 Kg/Cm2 and2the compressive strength implied (f'c) = 175 Kg/Cm2. Concrete compressive strength testing of fiber variation of 0.25% at 28 days the value of the average compressive strength of the targeted (f'cr) is 94.342 Kg/Cm2 and the compressive strength implied (f'c) is 77.619 Kg/Cm2 of compressive strength average need targeted (f'cr) = 255 Kg/Cm2 and the compressive strength implied (f'c) = 175 Kg/Cm2. Concrete compressive strength testing of fiber variation of 0.5% at 28 days the compressive strength average (f'cr) is 87.343 Kg/Cm2 and the compressive strength implied (f'c) is 70.633 Kg/Cm2 from the mean compressive strength average need targeted (f'cr) = 255 Kg/Cm2 and the compressive strength implied (f'c) = 175 Kg/Cm2

Characterization of the mIHF Gene of Mycobacterium smegmatis

Integration of mycobacteriophage L5 requires the mycobacterial integration host factor (mIHF) in vitro. mIHF is a 105-residue heat-stable polypeptide that is not obviously related to HU or any other small DNA-binding proteins. mIHF is most abundant just prior to entry into stationary phase and is essential for the viability of Mycobacterium smegmatis